release 3.6.1

(did not yet happen...)

.github/workflows/ci.yml

@@ -20,47 +20,29 @@ on:
 
 jobs:
   build:
+    name: build (11)
     runs-on: ubuntu-latest
 
-    strategy:
-      matrix:
-        # test against
-        # - Java 8 (minimum requirement)
-        # - Java LTS versions (11, 17, ...)
-        # - latest Java version(s)
-        java:
-          - 8
-          - 11  # LTS
-          - 17  # LTS
-          - 21  # LTS
-        toolchain: [""]
-        include:
-          - java: 21
-            toolchain: 22  # latest
-
     steps:
       - uses: actions/checkout@v4
 
-      - uses: gradle/wrapper-validation-action@v2
+      - uses: gradle/actions/wrapper-validation@v4
-        if: matrix.java == '8'
 
-      - name: Setup Java ${{ matrix.java }}
+      - name: Setup Java 11
         uses: actions/setup-java@v4
         with:
-          java-version: ${{ matrix.java }}
+          java-version: 11
-          distribution: temurin  # Java 8, 11, 17 and 21 are pre-installed on ubuntu-latest
+          distribution: temurin  # pre-installed on ubuntu-latest
           cache: gradle
 
       - name: Check with Error Prone
-        if: matrix.java == '11'
+        run: ./gradlew errorprone clean
-        run: ./gradlew errorprone clean -Dtoolchain=${{ matrix.toolchain }}
 
       - name: Build with Gradle
-        run: ./gradlew build -Dtoolchain=${{ matrix.toolchain }}
+        run: ./gradlew build
 
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
-        if: matrix.java == '11'
         with:
           name: FlatLaf-build-artifacts
           path: |
@@ -70,9 +52,44 @@ jobs:
             !**/*-sources.jar
 
 
-  snapshot:
+  build-on:
     runs-on: ubuntu-latest
     needs: build
+    if: github.repository == 'JFormDesigner/FlatLaf'
+
+    strategy:
+      matrix:
+        # test against
+        # - Java 8 (minimum requirement)
+        # - Java LTS versions (11, 17, ...)
+        # - latest Java version(s)
+        java:
+          - 8
+          - 17  # LTS
+          - 21  # LTS
+          - 23  # latest
+        toolchain: [""]
+#        include:
+#          - java: 21
+#            toolchain: 22  # latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Java ${{ matrix.java }}
+        uses: actions/setup-java@v4
+        with:
+          java-version: ${{ matrix.java }}
+          distribution: temurin  # Java 8, 11, 17 and 21 are pre-installed on ubuntu-latest
+          cache: gradle
+
+      - name: Build with Gradle
+        run: ./gradlew build -Dtoolchain=${{ matrix.toolchain }}
+
+
+  snapshot:
+    runs-on: ubuntu-latest
+    needs: build-on
     if: |
       github.event_name == 'push' &&
       (github.ref == 'refs/heads/main' || startsWith( github.ref, 'refs/heads/develop-' )) &&
@@ -88,27 +105,16 @@ jobs:
           distribution: temurin  # pre-installed on ubuntu-latest
           cache: gradle
 
-      - name: Publish snapshot to oss.sonatype.org
+      - name: Publish snapshot to Sonatype Central
-        run: ./gradlew publish :flatlaf-theme-editor:build -PskipFonts -Dorg.gradle.internal.publish.checksums.insecure=true -Dorg.gradle.parallel=false
+        run: ./gradlew publish -PskipFonts -Dorg.gradle.internal.publish.checksums.insecure=true -Dorg.gradle.parallel=false
         env:
-          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
-          OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
-
-      - name: Upload theme editor
-        uses: sebastianpopp/ftp-action@releases/v2
-        with:
-          host: ${{ secrets.FTP_SERVER }}
-          user: ${{ secrets.FTP_USERNAME }}
-          password: ${{ secrets.FTP_PASSWORD }}
-          forceSsl: true
-          localDir: "flatlaf-theme-editor/build/libs"
-          remoteDir: "snapshots"
-          options: "--only-newer --no-recursion --verbose=1"
 
 
   release:
     runs-on: ubuntu-latest
-    needs: build
+    needs: build-on
     if: |
       github.event_name == 'push' &&
       startsWith( github.ref, 'refs/tags/' ) &&
@@ -125,31 +131,19 @@ jobs:
           cache: gradle
 
       - name: Release a new stable version to Maven Central
-        run: ./gradlew publish :flatlaf-demo:build :flatlaf-theme-editor:build -PskipFonts -Prelease -Dorg.gradle.parallel=false
+        run: ./gradlew publishToSonatype closeSonatypeStagingRepository :flatlaf-demo:build :flatlaf-theme-editor:build -PskipFonts -Prelease -Dorg.gradle.parallel=false
         env:
-          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
-          OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
           SIGNING_KEY:      ${{ secrets.SIGNING_KEY }}
           SIGNING_PASSWORD: ${{ secrets.SIGNING_PASSWORD }}
 
-      - name: Upload demo
+      - name: Install lftp
-        uses: sebastianpopp/ftp-action@releases/v2
+        run: sudo apt-get -y install lftp
-        with:
-          host: ${{ secrets.FTP_SERVER }}
-          user: ${{ secrets.FTP_USERNAME }}
-          password: ${{ secrets.FTP_PASSWORD }}
-          forceSsl: true
-          localDir: "flatlaf-demo/build/libs"
-          remoteDir: "."
-          options: "--only-newer --no-recursion --verbose=1"
 
-      - name: Upload theme editor
+      - name: Upload demo and theme editor
-        uses: sebastianpopp/ftp-action@releases/v2
+        run: >
-        with:
+          lftp -c "set ftp:ssl-force true;
-          host: ${{ secrets.FTP_SERVER }}
+            open -u ${{ secrets.FTP_USERNAME }},${{ secrets.FTP_PASSWORD }} ${{ secrets.FTP_SERVER }};
-          user: ${{ secrets.FTP_USERNAME }}
+            mput flatlaf-demo/build/libs/flatlaf-demo-*.jar;
-          password: ${{ secrets.FTP_PASSWORD }}
+            mput flatlaf-theme-editor/build/libs/flatlaf-theme-editor-*.jar"
-          forceSsl: true
-          localDir: "flatlaf-theme-editor/build/libs"
-          remoteDir: "."
-          options: "--only-newer --no-recursion --verbose=1"

.github/workflows/fonts.yml

@@ -45,18 +45,18 @@ jobs:
               run: ./gradlew :flatlaf-fonts-${{ matrix.font }}:build
               if: startsWith( github.ref, format( 'refs/tags/fonts/{0}-', matrix.font ) ) != true
 
-            - name: Publish snapshot to oss.sonatype.org
+            - name: Publish snapshot to Sonatype Central
               run: ./gradlew :flatlaf-fonts-${{ matrix.font }}:publish -Dorg.gradle.internal.publish.checksums.insecure=true
               env:
-                  OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+                  SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
-                  OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+                  SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
               if: github.ref == 'refs/heads/main' || startsWith( github.ref, 'refs/heads/develop-' )
 
             - name: Release a new stable version to Maven Central
               run: ./gradlew :flatlaf-fonts-${{ matrix.font }}:build :flatlaf-fonts-${{ matrix.font }}:publish -Prelease
               env:
-                  OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+                  SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
-                  OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+                  SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
                   SIGNING_KEY:      ${{ secrets.SIGNING_KEY }}
                   SIGNING_PASSWORD: ${{ secrets.SIGNING_PASSWORD }}
               if: startsWith( github.ref, format( 'refs/tags/fonts/{0}-', matrix.font ) )

.github/workflows/natives.yml

@@ -21,16 +21,25 @@ jobs:
         strategy:
             matrix:
                 os:
-                    - windows
+                    - windows-latest
-                    - macos
+                    - macos-latest
-                    - ubuntu
+                    - ubuntu-latest
+                    - ubuntu-24.04-arm
 
-        runs-on: ${{ matrix.os }}-latest
+        runs-on: ${{ matrix.os }}
 
         steps:
             - uses: actions/checkout@v4
 
-            - uses: gradle/wrapper-validation-action@v2
+            - uses: gradle/actions/wrapper-validation@v4
+
+            - name: install libxt-dev
+              if: matrix.os == 'ubuntu-latest' || matrix.os == 'ubuntu-24.04-arm'
+              run: sudo apt install libxt-dev
+
+            - name: install g++-aarch64-linux-gnu
+              if: matrix.os == 'ubuntu-latest'
+              run: sudo apt install g++-aarch64-linux-gnu
 
             - name: Setup Java 11
               uses: actions/setup-java@v4

.github/workflows/pr-snapshots.yml

@@ -28,10 +28,10 @@ jobs:
           distribution: temurin  # pre-installed on ubuntu-latest
           cache: gradle
 
-      - name: Publish PR snapshot to oss.sonatype.org
+      - name: Publish PR snapshot to Sonatype Central
         run: >
           ./gradlew publish -PskipFonts -Dorg.gradle.internal.publish.checksums.insecure=true -Dorg.gradle.parallel=false
           -Pgithub.event.pull_request.number=${{ github.event.pull_request.number }}
         env:
-          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
-          OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}

.gitignore

@@ -5,6 +5,7 @@ build/
 .project
 .settings/
 .idea/
+.consulo/
 out/
 *.iml
 *.ipr

CHANGELOG.md

@@ -1,6 +1,282 @@
 FlatLaf Change Log
 ==================
 
+## 3.6.1
+
+- Extras: Support JSVG 2.0.0. Minimum JSVG version is now 1.6.0. (issue #997)
+- FlatLaf window decorations (Windows 10/11 only): Improved diagonal window
+  resizing on top-left and top-right window corners. Top window resize area now
+  also covers iconify/maximize/close buttons. (issue #1015)
+- ToggleButton: Styling `selectedForeground` did not work if `foreground` is
+  also styled. (issue #1017)
+- JideSplitButton: Fixed updating popup when switching theme. (issue #1000)
+- IntelliJ Themes: Fixed logging false errors when loading 3rd party
+  `.theme.json` files. (issue #990)
+- Linux: Popups appeared in wrong position on multi-screen setup if primary
+  display is located below or right to secondary display. (see
+  [NetBeans issue #8532](https://github.com/apache/netbeans/issues/8532))
+- macOS: Fixed popup flickering after theme change. (issue #1009)
+- macOS with JetBrains Runtime: Fixed sometimes empty popups. (issue #1019)
+
+
+## 3.6
+
+#### New features and improvements
+
+- macOS: Re-enabled rounded popup border (see PR #772) on macOS 14.4+ (was
+  disabled in 3.5.x).
+- Increased contrast of text for better readability: (PR #972; issue #762)
+  - In **FlatLaf Dark**, **FlatLaf Darcula** and many dark IntelliJ themes, made
+    all text colors brighter.
+  - In **FlatLaf Light**, **FlatLaf IntelliJ** and many light IntelliJ themes,
+    made disabled text colors slightly darker.
+  - In **FlatLaf macOS Light**, made disabled text colors darker.
+  - In **FlatLaf macOS Dark**, made text colors of "default" button and selected
+    ToggleButton lighter.
+- CheckBox: Support styling indeterminate state of
+  [tri-state check boxes](https://www.javadoc.io/doc/com.formdev/flatlaf-extras/latest/com/formdev/flatlaf/extras/components/FlatTriStateCheckBox.html).
+  (PR #936; issue #919)
+- List: Support for alternate row highlighting. (PR #939)
+- Tree: Support for alternate row highlighting. (PR #903)
+- Tree: Support wide cell renderer. (issue #922)
+- ScrollBar: Use rounded thumb also on Windows (as on macOS and Linux) and made
+  thumb slightly darker/lighter. (issue #918)
+- Extras: `FlatSVGIcon` color filters now can access painting component to
+  implement component state based color mappings. (issue #906)
+- Linux:
+  - Rounded iconify/maximize/close buttons if using FlatLaf window decorations.
+    (PR #971)
+  - Added `libflatlaf-linux-arm64.so` for Linux on ARM64. (issue #899)
+  - Use X11 window manager events to resize window, if FlatLaf window
+    decorations are enabled. This gives FlatLaf windows a more "native" feeling.
+    (issue #866)
+- IntelliJ Themes:
+  - Updated to latest versions and fixed various issues.
+  - Support customizing through properties files. (issue #824)
+- SwingX: Support `JXTipOfTheDay` component. (issue #980)
+- Support key prefixes for Linux desktop environments (e.g. `[gnome]`, `[kde]`
+  or `[xfce]`) in properties files. (issue #974)
+- Support custom key prefixes (e.g. `[win10]` or `[test]`) in properties files.
+  (issue #649)
+- Support multi-prefixed keys (e.g. `[dark][gnome]TitlePane.buttonBackground`).
+  The value is only used if all prefixes match current platform/theme.
+- Support new component border color to indicate success state (set client
+  property `JComponent.outline` to `success`). (PR #982, issue #945)
+- Fonts: Updated **Inter** to
+  [v4.1](https://github.com/rsms/inter/releases/tag/v4.1).
+
+#### Fixed bugs
+
+- Button: Fixed background and foreground colors for `borderless` and
+  `toolBarButton` style default buttons (`JButton.isDefaultButton()` is `true`).
+  (issue #947)
+- FileChooser: Improved performance when navigating to large directories with
+  thousands of files. (issue #953)
+- PopupFactory: Fixed NPE on Windows 10 when `owner` is `null`. (issue #952)
+- Popup: On Windows 10, drop shadow of heavy-weight popup was not updated if
+  popup moved/resized. (issue #942)
+- FlatLaf window decorations:
+  - Minimize and maximize icons were not shown for custom scale factors less
+    than 100% (e.g. `-Dflatlaf.uiScale=75%`). (issue #951)
+  - Linux: Fixed occasional maximizing of window when single-clicking the
+    window's title bar. (issue #637)
+- Styling: MigLayout visual padding was not updated after applying style to
+  Button, ComboBox, Spinner, TextField (and subclasses) and ToggleButton. (issue
+  #965)
+- Linux: Popups (menus and combobox lists) were not hidden when window is moved,
+  resized, maximized, restored, iconified or switched to another window. (issue
+  #962)
+- Fixed loading FlatLaf UI delegate classes when using FlatLaf in special
+  application where multiple class loaders are involved. E.g. in Eclipse plugin
+  or in LibreOffice extension. (issues #955 and #851)
+- HTML: Fixed rendering of `<hr noshade>` in dark themes. (issue #932)
+- TextComponents: `selectAllOnFocusPolicy` related changes:
+  - No longer select all text if selection (or caret position) was changed by
+    application and `selectAllOnFocusPolicy` is `once` (the default). (issue
+    #983)
+  - FormattedTextField and Spinner: `selectAllOnFocusPolicy = once` behaves now
+    as `always` (was `never` before), which means that all text is selected when
+    component gains focus. This is because of special behavior of
+    `JFormattedTextField` that did not allow implementation of `once`.
+  - Client property `JTextField.selectAllOnFocusPolicy` now also works on
+    (editable) `JComboBox` and on `JSpinner`.
+  - Added client property `JTextField.selectAllOnMouseClick` to override UI
+    property `TextComponent.selectAllOnMouseClick`. (issue #961)
+  - For `selectAllOnMouseClick = true`, clicking with the mouse into the text
+    field, to focus it, now always selects all text, even if
+    `selectAllOnFocusPolicy` is `once`.
+
+#### Incompatibilities
+
+- IntelliJ Themes:
+  - Theme prefix in `IntelliJTheme$ThemeLaf.properties` changed from
+    `[theme-name]` to `{theme-name}`.
+  - Renamed classes in package
+    `com.formdev.flatlaf.intellijthemes.materialthemeuilite` from `Flat<theme>`
+    to `FlatMT<theme>`.
+  - Removed `Gruvbox Dark Medium` and `Gruvbox Dark Soft` themes.
+- Prefixed keys in properties files (e.g. `[dark]Button.background` or
+  `[win]Button.arc`) are now handled earlier than before. In previous versions,
+  prefixed keys always had higher priority than unprefixed keys and did always
+  overwrite unprefixed keys. Now prefixed keys are handled in same order as
+  unprefixed keys, which means that if a key is prefixed and unprefixed (e.g.
+  `[win]Button.arc` and `Button.arc`), the one which is last specified in
+  properties file is used.\
+  Following worked in previous versions, but now `Button.arc` is always `6`:
+  ~~~properties
+  [win]Button.arc = 12
+  Button.arc = 6
+  ~~~
+  This works in new (and old) versions:
+  ~~~properties
+  Button.arc = 6
+  [win]Button.arc = 12
+  ~~~
+
+
+## 3.5.4
+
+#### Fixed bugs
+
+- HTML: Fixed NPE when using HTML text on a component with `null` font. (issue
+  #930; PR #931; regression in 3.5)
+- Linux: Fixed NPE when using FlatLaf window decorations and switching theme.
+  (issue #933; regression in 3.5.3)
+
+
+## 3.5.3
+
+#### Fixed bugs
+
+- HTML: Fixed wrong rendering if HTML text contains `<style>` tag with
+  attributes (e.g. `<style type='text/css'>`). (issue #905; regression in 3.5.1)
+- FlatLaf window decorations:
+  - Windows: Fixed possible deadlock with TabbedPane in window title area in
+    "full window content" mode. (issue #909)
+  - Windows: Fixed wrong layout in maximized frame after changing screen scale
+    factor. (issue #904)
+  - Linux: Fixed continuous cursor toggling between resize and standard cursor
+    when resizing window. (issue #907)
+  - Fixed sometimes broken window moving with SplitPane in window title area in
+    "full window content" mode. (issue #926)
+- Popup: On Windows 10, fixed misplaced popup drop shadow. (issue #911;
+  regression in 3.5)
+- Popup: Fixed NPE if `GraphicsConfiguration` is `null` on Windows. (issue #921)
+- Theme Editor: Fixed using color picker on secondary screen.
+- Fixed detection of Windows 11 if custom exe launcher does not specify Windows
+  10+ compatibility in application manifest. (issue #916)
+- Linux: Fixed slightly different font size (or letter width) used to paint HTML
+  text when default font family is _Cantarell_ (e.g. on Fedora). (issue #912)
+
+#### Other Changes
+
+- Class `FlatPropertiesLaf` now supports FlatLaf macOS themes as base themes.
+
+
+## 3.5.2
+
+#### Fixed bugs
+
+- Windows: Fixed repaint issues (ghosting) on some systems (probably depending
+  on graphics card/driver). This is done by setting Java system property
+  `sun.java2d.d3d.onscreen` to `false` (but only if `sun.java2d.d3d.onscreen`,
+  `sun.java2d.d3d` and `sun.java2d.noddraw` are not yet set), which disables
+  usage of Windows Direct3D (DirectX) onscreen surfaces. Component rendering
+  still uses Direct3D. (issue #887)
+- FlatLaf window decorations:
+  - Iconify/maximize/close buttons did not fill whole title bar height, if some
+    custom component in menu bar increases title bar height. (issue #897)
+  - Windows: Fixed possible application freeze when using custom component that
+    overrides `Component.contains(int x, int y)` and invokes
+    `SwingUtilities.convertPoint()` (or similar) from the overridden method.
+    (issue #878)
+- TextComponents: Fixed too fast scrolling in multi-line text components when
+  using touchpads (e.g. on macOS). (issue #892)
+- ToolBar: Fixed endless loop if button in Toolbar has focus and is made
+  invisible. (issue #884)
+
+#### Other Changes
+
+- FlatLaf window decorations: Added client property `JRootPane.titleBarHeight`
+  to allow specifying a (larger) preferred height for the title bar. (issue
+  #897)
+- Added system property `flatlaf.useRoundedPopupBorder` to allow disabling
+  native rounded popup borders on Windows 11 and macOS. On macOS 14.4+, where
+  rounded popup borders are disabled since FlatLaf 3.5 because of occasional
+  problems, you can use this to enable rounded popup borders (at your risk).
+
+
+## 3.5.1
+
+#### Fixed bugs
+
+- HTML: Fixed occasional cutoff wrapped text when using multi-line text in HTML
+  tags `<h1>`...`<h6>`, `<code>`, `<kbd>`, `<big>`, `<small>` or `<samp>`.
+  (issue #873; regression in 3.5)
+- Popup: Fixed `UnsupportedOperationException: PERPIXEL_TRANSLUCENT translucency
+  is not supported` exception on Haiku OS when showing popup (partly) outside of
+  window. (issue #869)
+- HiDPI: Fixed occasional wrong repaint areas when using
+  `HiDPIUtils.installHiDPIRepaintManager()`. (see PR #864)
+- Added system property `flatlaf.useSubMenuSafeTriangle` to allow disabling
+  submenu safe triangle (PR #490) for
+  [SWTSwing](https://github.com/Chrriis/SWTSwing). (issue #870)
+
+
+## 3.5
+
+#### New features and improvements
+
+- Table: Support rounded selection. (PR #856)
+- Button and ToggleButton: Added border colors for pressed and selected states.
+  (issue #848)
+- Label: Support painting background with rounded corners. (issue #842)
+- Popup: Fixed flicker of popups (e.g. tooltips) while they are moving (e.g.
+  following mouse pointer). (issues #832 and #672)
+- FileChooser: Wrap shortcuts in scroll pane. (issue #828)
+- Theme Editor: On macOS, use larger window title bar. (PR #779)
+
+#### Fixed bugs
+
+- macOS: Disabled rounded popup border (see PR #772) on macOS 14.4+ because it
+  may freeze the application and crash the macOS WindowServer process (reports
+  vary from Finder restarts to OS restarts). This is a temporary change until a
+  solution is found. See NetBeans issues
+  [apache/netbeans#7560](https://github.com/apache/netbeans/issues/7560#issuecomment-2226439215)
+  and
+  [apache/netbeans#6647](https://github.com/apache/netbeans/issues/6647#issuecomment-2070124442).
+- FlatLaf window decorations: Window top border on Windows 10 in "full window
+  content" mode was not fully repainted when activating or deactivating window.
+  (issue #809)
+- Button and ToggleButton: UI properties `[Toggle]Button.selectedForeground` and
+  `[Toggle]Button.pressedForeground` did not work for HTML text. (issue #848)
+- HTML: Fixed font sizes for HTML tags `<h1>`...`<h6>`, `<code>`, `<kbd>`,
+  `<big>`, `<small>` and `<samp>` in HTML text for components Button, CheckBox,
+  RadioButton, MenuItem (and subclasses), JideLabel, JideButton, JXBusyLabel and
+  JXHyperlink. Also fixed for Label and ToolTip if using Java 11+.
+- ScrollPane: Fixed/improved border painting at 125% - 175% scaling to avoid
+  different border thicknesses. (issue #743)
+- Table: Fixed painting of alternating rows below table if auto-resize mode is
+  `JTable.AUTO_RESIZE_OFF` and table width is smaller than scroll pane (was not
+  updated when table width changed and was painted on wrong side in
+  right-to-left component orientation).
+- Theme Editor: Fixed occasional empty window on startup on macOS.
+- FlatLaf window decorations: Fixed black line sometimes painted on top of
+  (native) window border on Windows 11. (issue #852)
+- HiDPI: Fixed incomplete component paintings at 125% or 175% scaling on Windows
+  where sometimes a 1px wide area at the right or bottom component edge is not
+  repainted. E.g. ScrollPane focus indicator border. (issues #860 and #582)
+
+#### Incompatibilities
+
+- ProgressBar: Log warning (including stack trace) when uninstalling
+  indeterminate progress bar UI or using `JProgressBar.setIndeterminate(false)`
+  not on AWT thread, because this may throw NPE in `FlatProgressBarUI.paint()`.
+  (issues #841 and #830)
+- Panel: Rounded background of panel with rounded corners is now painted even if
+  panel is not opaque. (issue #840)
+
+
 ## 3.4.1
 
 #### Fixed bugs
@@ -10,7 +286,7 @@ FlatLaf Change Log
 - TabbedPane: Fixed swapped back and forward scroll buttons when using
   `TabbedPane.scrollButtonsPlacement = trailing` (regression in FlatLaf 3.3).
 - Fixed missing window top border on Windows 10 in "full window content" mode.
-  (issue 809)
+  (issue #809)
 - Extras:
   - `FlatSVGIcon` color filters now support linear gradients. (PR #817)
   - `FlatSVGIcon`: Use log level `CONFIG` instead of `SEVERE` and allow
@@ -54,8 +330,8 @@ FlatLaf Change Log
   - Improved log messages for loading fails.
 - Fonts: Updated **Inter** to
   [v4.0](https://github.com/rsms/inter/releases/tag/v4.0).
-- Table: Select all text in cell editor when starting editing using `F2` key.
+- Table: Select all text in cell editor when starting editing using `F2` key on
-  (issue 652)
+  Windows or Linux. (issue #652)
 
 #### Fixed bugs
 
@@ -83,7 +359,7 @@ FlatLaf Change Log
 #### Fixed bugs
 
 - Button and ToggleButton: Selected buttons did not use explicitly set
-  foreground color. (issue 756)
+  foreground color. (issue #756)
 - FileChooser: Catch NPE in Java 21 when getting icon for `.exe` files that use
   default Windows exe icon. (see
   [JDK-8320692](https://bugs.openjdk.org/browse/JDK-8320692))
@@ -836,7 +1112,7 @@ FlatLaf Change Log
 - Native window decorations (Windows 10 only):
   - Fixed occasional application crash in `flatlaf-windows.dll`. (issue #357)
   - When window is initially shown, fill background with window background color
-    (instead of white), which avoids flickering in dark themes. (issue 339)
+    (instead of white), which avoids flickering in dark themes. (issue #339)
   - When resizing a window at the right/bottom edge, then first fill the new
     space with the window background color (instead of black) before the layout
     is updated.

README.md

@@ -33,14 +33,22 @@ FlatLaf can use 3rd party themes created for IntelliJ Platform (see
 Sponsors
 --------
 
+### Current Sponsors
+
+<a href="https://exocharts.com/"><img src="https://www.formdev.com/flatlaf/sponsor/Exocharts.png" width="200" alt="Exocharts" title="Exocharts - Professional Grade OrderFlow"></a>
+
+<!-- [![None Sponsors](images/none-sponsors.png)](https://www.formdev.com/flatlaf/sponsor/) -->
+
+[Become a Sponsor](https://www.formdev.com/flatlaf/sponsor/)
+
+### Previous Sponsors
+
 <a href="https://www.ej-technologies.com/"><img src="https://www.formdev.com/flatlaf/sponsor/ej-technologies.png" width="200" alt="ej-technologies" title="ej-technologies - Java APM, Java Profiler, Java Installer Builder"></a>
 &nbsp; &nbsp; &nbsp; &nbsp;
 <a href="https://www.dbvis.com/"><img src="https://www.formdev.com/flatlaf/sponsor/dbvisualizer.svg" width="200" alt="DbVisualizer" title="DbVisualizer - SQL Client and Editor"></a>
 &nbsp; &nbsp; &nbsp; &nbsp;
 <a href="https://www.dscsag.com/"><img src="https://www.formdev.com/flatlaf/sponsor/DSC.png" height="48" alt="DSC Software AG" title="DSC Software AG - Your Companion for Integrative PLM"></a>
 
-[Become a Sponsor](https://www.formdev.com/flatlaf/sponsor/)
-
 Demo
 ----
 
@@ -75,10 +83,10 @@ application.
 ### Snapshots
 
 FlatLaf snapshot binaries are available on
-[Sonatype OSSRH](https://oss.sonatype.org/content/repositories/snapshots/com/formdev/flatlaf/).
+[Sonatype Central](https://central.sonatype.com/service/rest/repository/browse/maven-snapshots/com/formdev/flatlaf/).
 To access the latest snapshot, change the FlatLaf version in your dependencies
-to `<version>-SNAPSHOT` (e.g. `0.27-SNAPSHOT`) and add the repository
+to `<version>-SNAPSHOT` (e.g. `3.7-SNAPSHOT`) and add the repository
-`https://oss.sonatype.org/content/repositories/snapshots/` to your build (see
+`https://central.sonatype.com/repository/maven-snapshots/` to your build (see
 [Maven](https://maven.apache.org/guides/mini/guide-multiple-repositories.html)
 and
 [Gradle](https://docs.gradle.org/current/userguide/declaring_repositories.html#sec:declaring_custom_repository)
@@ -176,11 +184,16 @@ Applications using FlatLaf
   relational data browsing tool
 - ![Hot](images/hot.svg) [MagicPlot](https://magicplot.com/) (**commercial**) -
   Software for nonlinear fitting, plotting and data analysis
-- ![New](images/new.svg) [Constellation](https://www.constellation-app.com/) -
+- [Constellation](https://www.constellation-app.com/) - Data Visualization and
-  Data Visualization and Analytics (based on NetBeans platform)
+  Analytics (based on NetBeans platform)
-- ![New](images/new.svg)
+- [Kafka Visualizer](https://github.com/kumait/kafkavisualizer) - Kafka GUI
-  [Kafka Visualizer](https://github.com/kumait/kafkavisualizer) - Kafka GUI
   client
+- ![New](images/new.svg)
+  [RedisFront](https://github.com/dromara/RedisFront/blob/master/README_EN.md) -
+  Cross-platform redis GUI
+- ![New](images/new.svg)
+  [Zettelkasten](https://github.com/Zettelkasten-Team/Zettelkasten) - knowledge
+  management tool
 
 ### Security
 
@@ -189,11 +202,9 @@ Applications using FlatLaf
 - ![Hot](images/hot.svg)
   [Burp Suite Professional and Community Edition](https://portswigger.net/burp/pro)
   (**commercial**) - the leading software for web security testing
-- ![New](images/new.svg)
+- [Ghidra](https://github.com/NationalSecurityAgency/ghidra) - a software
-  [Ghidra](https://github.com/NationalSecurityAgency/ghidra) - a software
   reverse engineering (SRE) framework
-- ![New](images/new.svg) [jadx](https://github.com/skylot/jadx) - Dex to Java
+- [jadx](https://github.com/skylot/jadx) - Dex to Java decompiler
-  decompiler
 - [BurpCustomizer](https://github.com/CoreyD97/BurpCustomizer) - adds more
   FlatLaf themes to Burp Suite
 - [Total Validator](https://www.totalvalidator.com/) (**commercial**) - checks
@@ -205,19 +216,24 @@ Applications using FlatLaf
 
 - [jclasslib bytecode viewer](https://github.com/ingokegel/jclasslib)
 - [KeyStore Explorer](https://keystore-explorer.org/)
-- ![New](images/new.svg)
+- [muCommander](https://github.com/mucommander/mucommander) - lightweight
-  [muCommander](https://github.com/mucommander/mucommander) - lightweight
   cross-platform file manager
-- ![New](images/new.svg) [Guiffy](https://www.guiffy.com/) (**commercial**) -
+- [Guiffy](https://www.guiffy.com/) (**commercial**) - advanced cross-platform
-  advanced cross-platform Diff/Merge
+  Diff/Merge
-- ![New](images/new.svg) [HashGarten](https://github.com/jonelo/HashGarten) -
+- [HashGarten](https://github.com/jonelo/HashGarten) - cross-platform Swing GUI
-  cross-platform Swing GUI for Jacksum
+  for Jacksum
 - [Pseudo Assembler IDE](https://github.com/tomasz-herman/PseudoAssemblerIDE) -
   IDE for Pseudo-Assembler
 - [Linotte](https://github.com/cpc6128/LangageLinotte) - French programming
   language created to learn programming
 - [lsfusion platform](https://github.com/lsfusion/platform) - information
   systems development platform
+- ![New](images/new.svg) [Consulo](https://github.com/consulo/consulo) - open
+  source cross-platform multi-language IDE (Java, .NET, JS, etc)
+- [Convertigo](https://github.com/convertigo/convertigo) - low code & no code
+  mobile & web platform
+- ![New](images/new.svg) [EduMIPS64](https://github.com/EduMIPS64/edumips64) -
+  visual MIPS64 CPU simulator
 
 ### Electrical
 
@@ -225,6 +241,11 @@ Applications using FlatLaf
   designing, simulating and explaining digital circuits
 - [Logisim-evolution](https://github.com/logisim-evolution/logisim-evolution) -
   Digital logic design tool and simulator
+- ![New](images/new.svg) [OpenPnP](https://github.com/openpnp/openpnp) - SMT
+  Pick and Place Hardware and Software
+- ![New](images/new.svg)
+  [TrainControl](https://github.com/bob123456678/TrainControl) - control Marklin
+  / Trix / DCC digital model train layout
 - [Makelangelo Software](https://github.com/MarginallyClever/Makelangelo-software) -
   for plotters, especially the wall-hanging polargraph
 - [GUIslice Builder](https://github.com/ImpulseAdventure/GUIslice-Builder) - GUI
@@ -239,8 +260,10 @@ Applications using FlatLaf
 
 - ![Hot](images/hot.svg) [jAlbum](https://jalbum.net/) (**commercial**) -
   creates photo album websites
-- ![New](images/new.svg) [MediathekView](https://mediathekview.de/) - search in
+- [MediathekView](https://mediathekview.de/) - search in media libraries of
-  media libraries of various German broadcasters
+  various German broadcasters
+- ![New](images/new.svg) [Pixelitor](https://github.com/lbalazscs/Pixelitor) -
+  image editor
 - [Cinecred](https://loadingbyte.com/cinecred/) - create beautiful film credit
   sequences
 - [tinyMediaManager](https://www.tinymediamanager.org/) (**commercial**) - a
@@ -257,18 +280,23 @@ Applications using FlatLaf
 - [lectureStudio](https://www.lecturestudio.org/) - digitize your lectures with
   ease
 
-### Modelling
+### Modelling / Planning
 
-- ![New](images/new.svg) [Astah](https://astah.net/) (**commercial**) - create
+- ![New](images/new.svg) [Gephi](https://github.com/gephi/gephi) - the Open
-  UML, ER Diagram, Flowchart, Data Flow Diagram, Requirement Diagram, SysML
+  Graph Viz Platform
-  diagrams and more
+- [Astah](https://astah.net/) (**commercial**) - create UML, ER Diagram,
+  Flowchart, Data Flow Diagram, Requirement Diagram, SysML diagrams and more
 - [IGMAS+](https://www.gfz-potsdam.de/igmas) - Interactive Gravity and Magnetic
   Application System
+- ![New](images/new.svg) [StarPlan](https://www.progotec.de/) (**commercial**) -
+  die Stundenplan Software für Bildungseinrichtungen
+- ![New](images/new.svg) [SSPlot](https://github.com/babaissarkar/ssplot) -
+  plotting utility for plotting CSV data
 
 ### Documents
 
-- ![New](images/new.svg) [Big Faceless (BFO) PDF Viewer](https://bfo.com/)
+- [Big Faceless (BFO) PDF Viewer](https://bfo.com/) (**commercial**) - Swing PDF
-  (**commercial**) - Swing PDF Viewer
+  Viewer
 - [PDF Studio](https://www.qoppa.com/pdfstudio/) (**commercial**) - create,
   review and edit PDF documents
 - [XMLmind XML Editor](https://www.xmlmind.com/xmleditor/) (**commercial**)
@@ -286,6 +314,9 @@ Applications using FlatLaf
 
 ### Business / Legal
 
+- ![New](images/new.svg) ![Sponsor](images/sponsor.svg)
+  [Lisheane ERP](https://www.lisheane.ch/) (**commercial**) - backoffice
+  applikation
 - ![Sponsor](images/sponsor.svg)
   [j-lawyer](https://github.com/jlawyerorg/j-lawyer-org) - Kanzleisoftware
 - ![Sponsor](images/sponsor.svg) [Jeyla Studio](https://www.jeylastudio.com/) -
@@ -302,20 +333,20 @@ Applications using FlatLaf
 
 ### Messaging
 
-- ![New](images/new.svg) [Spark](https://github.com/igniterealtime/Spark) -
+- [Spark](https://github.com/igniterealtime/Spark) - cross-platform IM client
-  cross-platform IM client optimized for businesses and organizations
+  optimized for businesses and organizations
-- ![New](images/new.svg) [Chatty](https://github.com/chatty/chatty) - Twitch
+- [Chatty](https://github.com/chatty/chatty) - Twitch Chat Client
-  Chat Client
 
 ### Gaming
 
-- ![New](images/new.svg) ![Sponsor](images/sponsor.svg)
+- ![Sponsor](images/sponsor.svg) [BGBlitz](https://www.bgblitz.com/)
-  [BGBlitz](https://www.bgblitz.com/) (**commercial**) - professional Backgammon
+  (**commercial**) - professional Backgammon
-- ![New](images/new.svg) [MCreator](https://github.com/MCreator/MCreator) - 
+- ![New](images/new.svg) [josé](https://peteschaefer.github.io/jose/) - a
-  software used to make Minecraft Java Edition mods, Minecraft Bedrock Edition Add-Ons, 
+  graphical chess tool
-  and data packs without programming knowledge
+- ![New](images/new.svg) [MCreator](https://github.com/MCreator/MCreator) - make
-- ![New](images/new.svg) [MapTool](https://github.com/RPTools/maptool) - virtual
+  Minecraft Java Edition mods, Minecraft Bedrock Edition Add-Ons, and data packs
-  Tabletop for playing role-playing games
+- [MapTool](https://github.com/RPTools/maptool) - virtual Tabletop for playing
+  role-playing games
 - [MegaMek](https://github.com/MegaMek/megamek),
   [MegaMekLab](https://github.com/MegaMek/megameklab) and
   [MekHQ](https://github.com/MegaMek/mekhq) - a sci-fi tabletop BattleTech
@@ -327,8 +358,7 @@ Applications using FlatLaf
 
 - [MooInfo](https://github.com/rememberber/MooInfo) - visual implementation of
   OSHI, to view information about the system and hardware
-- ![New](images/new.svg)
+- [Linux Task Manager (LTM)](https://github.com/ajee10x/LTM-LinuxTaskManager) -
-  [Linux Task Manager (LTM)](https://github.com/ajee10x/LTM-LinuxTaskManager) -
   GUI for monitoring and managing various aspects of a Linux system
 - [Rest Suite](https://github.com/supanadit/restsuite) - Rest API testing
 - [SpringRemote](https://github.com/HaleyWang/SpringRemote) - remote Linux SSH
@@ -337,6 +367,8 @@ Applications using FlatLaf
   easy
 - [Android Tool](https://github.com/fast-geek/Android-Tool) - makes popular adb
   and fastboot commands easier to use
+- ![New](images/new.svg) [Termora](https://github.com/TermoraDev/termora) -
+  Terminal emulator and SSH client
 
 ### Miscellaneous
 

build.gradle.kts

@@ -16,6 +16,7 @@
 
 import net.ltgt.gradle.errorprone.errorprone
 
+group = "com.formdev"
 version = property( if( hasProperty( "release" ) ) "flatlaf.releaseVersion" else "flatlaf.developmentVersion" ) as String
 
 // for PR snapshots change version to 'PR-<pr_number>-SNAPSHOT'
@@ -49,6 +50,7 @@ println()
 
 
 plugins {
+	alias( libs.plugins.gradle.nexus.publish.plugin )
 	alias( libs.plugins.errorprone ) apply false
 }
 
@@ -143,3 +145,20 @@ allprojects {
 		}
 	}
 }
+
+nexusPublishing {
+	repositories {
+		sonatype {
+			// see https://central.sonatype.org/publish/publish-portal-ossrh-staging-api/
+			nexusUrl = uri( "https://ossrh-staging-api.central.sonatype.com/service/local/" )
+			snapshotRepositoryUrl = uri( "https://central.sonatype.com/repository/maven-snapshots/" )
+
+			// get from gradle.properties
+			val sonatypeUsername: String? by project
+			val sonatypePassword: String? by project
+
+			username = System.getenv( "SONATYPE_USERNAME" ) ?: sonatypeUsername
+			password = System.getenv( "SONATYPE_PASSWORD" ) ?: sonatypePassword
+		}
+	}
+}

buildSrc/src/main/kotlin/flatlaf-publish.gradle.kts

@@ -86,24 +86,26 @@ publishing {
 		}
 	}
 
+/*
 	repositories {
 		maven {
-			name = "OSSRH"
+			name = "MavenCentral"
 
-			val releasesRepoUrl = "https://oss.sonatype.org/service/local/staging/deploy/maven2/"
+			val releasesRepoUrl = "https://ossrh-staging-api.central.sonatype.com/service/local/staging/deploy/maven2/"
-			val snapshotsRepoUrl = "https://oss.sonatype.org/content/repositories/snapshots/"
+			val snapshotsRepoUrl = "https://central.sonatype.com/repository/maven-snapshots/"
 			url = uri( if( rootProject.hasProperty( "release" ) ) releasesRepoUrl else snapshotsRepoUrl )
 
 			credentials {
 				// get from gradle.properties
-				val ossrhUsername: String? by project
+				val sonatypeUsername: String? by project
-				val ossrhPassword: String? by project
+				val sonatypePassword: String? by project
 
-				username = System.getenv( "OSSRH_USERNAME" ) ?: ossrhUsername
+				username = System.getenv( "SONATYPE_USERNAME" ) ?: sonatypeUsername
-				password = System.getenv( "OSSRH_PASSWORD" ) ?: ossrhPassword
+				password = System.getenv( "SONATYPE_PASSWORD" ) ?: sonatypePassword
 			}
 		}
 	}
+*/
 }
 
 signing {

flatlaf-core/.settings/org.eclipse.jdt.core.prefs

@@ -1,4 +1,7 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false

flatlaf-core/build.gradle.kts

@@ -156,5 +156,6 @@ flatlafPublish {
 		NativeArtifact( "${natives}/libflatlaf-macos-arm64.dylib",  "macos-arm64",    "dylib" ),
 		NativeArtifact( "${natives}/libflatlaf-macos-x86_64.dylib", "macos-x86_64",   "dylib" ),
 		NativeArtifact( "${natives}/libflatlaf-linux-x86_64.so",    "linux-x86_64",   "so" ),
+		NativeArtifact( "${natives}/libflatlaf-linux-arm64.so",     "linux-arm64",    "so" ),
 	)
 }

flatlaf-core/flatlaf-core-sigtest.txt

@@ -1,5 +1,5 @@
 #Signature file v4.1
-#Version 3.4
+#Version 3.6.1
 
 CLSS public abstract interface com.formdev.flatlaf.FlatClientProperties
 fld public final static java.lang.String BUTTON_TYPE = "JButton.buttonType"
@@ -24,6 +24,7 @@ fld public final static java.lang.String MINIMUM_HEIGHT = "JComponent.minimumHei
 fld public final static java.lang.String MINIMUM_WIDTH = "JComponent.minimumWidth"
 fld public final static java.lang.String OUTLINE = "JComponent.outline"
 fld public final static java.lang.String OUTLINE_ERROR = "error"
+fld public final static java.lang.String OUTLINE_SUCCESS = "success"
 fld public final static java.lang.String OUTLINE_WARNING = "warning"
 fld public final static java.lang.String PLACEHOLDER_TEXT = "JTextField.placeholderText"
 fld public final static java.lang.String POPUP_BORDER_CORNER_RADIUS = "Popup.borderCornerRadius"
@@ -40,6 +41,7 @@ fld public final static java.lang.String SELECT_ALL_ON_FOCUS_POLICY = "JTextFiel
 fld public final static java.lang.String SELECT_ALL_ON_FOCUS_POLICY_ALWAYS = "always"
 fld public final static java.lang.String SELECT_ALL_ON_FOCUS_POLICY_NEVER = "never"
 fld public final static java.lang.String SELECT_ALL_ON_FOCUS_POLICY_ONCE = "once"
+fld public final static java.lang.String SELECT_ALL_ON_MOUSE_CLICK = "JTextField.selectAllOnMouseClick"
 fld public final static java.lang.String SPLIT_PANE_EXPANDABLE_SIDE = "JSplitPane.expandableSide"
 fld public final static java.lang.String SPLIT_PANE_EXPANDABLE_SIDE_LEFT = "left"
 fld public final static java.lang.String SPLIT_PANE_EXPANDABLE_SIDE_RIGHT = "right"
@@ -100,12 +102,14 @@ fld public final static java.lang.String TEXT_FIELD_TRAILING_COMPONENT = "JTextF
 fld public final static java.lang.String TEXT_FIELD_TRAILING_ICON = "JTextField.trailingIcon"
 fld public final static java.lang.String TITLE_BAR_BACKGROUND = "JRootPane.titleBarBackground"
 fld public final static java.lang.String TITLE_BAR_FOREGROUND = "JRootPane.titleBarForeground"
+fld public final static java.lang.String TITLE_BAR_HEIGHT = "JRootPane.titleBarHeight"
 fld public final static java.lang.String TITLE_BAR_SHOW_CLOSE = "JRootPane.titleBarShowClose"
 fld public final static java.lang.String TITLE_BAR_SHOW_ICON = "JRootPane.titleBarShowIcon"
 fld public final static java.lang.String TITLE_BAR_SHOW_ICONIFFY = "JRootPane.titleBarShowIconify"
 fld public final static java.lang.String TITLE_BAR_SHOW_MAXIMIZE = "JRootPane.titleBarShowMaximize"
 fld public final static java.lang.String TITLE_BAR_SHOW_TITLE = "JRootPane.titleBarShowTitle"
 fld public final static java.lang.String TREE_PAINT_SELECTION = "JTree.paintSelection"
+fld public final static java.lang.String TREE_WIDE_CELL_RENDERER = "JTree.wideCellRenderer"
 fld public final static java.lang.String TREE_WIDE_SELECTION = "JTree.wideSelection"
 fld public final static java.lang.String USE_WINDOW_DECORATIONS = "JRootPane.useWindowDecorations"
 fld public final static java.lang.String WINDOW_STYLE = "Window.style"
@@ -219,10 +223,14 @@ meth public static java.lang.String getPreferredFontFamily()
 meth public static java.lang.String getPreferredLightFontFamily()
 meth public static java.lang.String getPreferredMonospacedFontFamily()
 meth public static java.lang.String getPreferredSemiboldFontFamily()
+meth public static java.lang.String getUIKeyLightOrDarkPrefix(boolean)
 meth public static java.util.Map<java.lang.String,java.lang.Class<?>> getStyleableInfos(javax.swing.JComponent)
 meth public static java.util.Map<java.lang.String,java.lang.String> getGlobalExtraDefaults()
+meth public static java.util.Set<java.lang.String> getUIKeyPlatformPrefixes()
+meth public static java.util.Set<java.lang.String> getUIKeySpecialPrefixes()
 meth public static java.util.function.Function<java.lang.String,java.awt.Color> getSystemColorGetter()
 meth public static javax.swing.UIDefaults$ActiveValue createActiveFontValue(float)
+meth public static void disableWindowsD3Donscreen()
 meth public static void hideMnemonics()
 meth public static void initIconColors(javax.swing.UIDefaults,boolean)
 meth public static void installLafInfo(java.lang.String,java.lang.Class<? extends javax.swing.LookAndFeel>)
@@ -253,7 +261,7 @@ meth public void setExtraDefaults(java.util.Map<java.lang.String,java.lang.Strin
 meth public void uninitialize()
 meth public void unregisterUIDefaultsGetter(java.util.function.Function<java.lang.Object,java.lang.Object>)
 supr javax.swing.plaf.basic.BasicLookAndFeel
-hfds DESKTOPFONTHINTS,aquaLoaded,customDefaultsSources,desktopPropertyListener,desktopPropertyName,desktopPropertyName2,extraDefaults,globalExtraDefaults,mnemonicHandler,oldPopupFactory,postInitialization,preferredFontFamily,preferredLightFontFamily,preferredMonospacedFontFamily,preferredSemiboldFontFamily,subMenuUsabilityHelperInstalled,systemColorGetter,uiDefaultsGetters,updateUIPending
+hfds DESKTOPFONTHINTS,aquaLoaded,customDefaultsSources,desktopPropertyListener,desktopPropertyName,desktopPropertyName2,extraDefaults,globalExtraDefaults,linuxPopupMenuCanceler,mnemonicHandler,oldPopupFactory,postInitialization,preferredFontFamily,preferredLightFontFamily,preferredMonospacedFontFamily,preferredSemiboldFontFamily,subMenuUsabilityHelperInstalled,systemColorGetter,uiDefaultsGetters,uiKeyPlatformPrefixes,uiKeySpecialPrefixes,updateUIPending
 hcls ActiveFont,FlatUIDefaults,ImageIconUIResource
 
 CLSS public abstract interface static com.formdev.flatlaf.FlatLaf$DisabledIconProvider
@@ -296,6 +304,8 @@ fld public final static java.lang.String UPDATE_UI_ON_SYSTEM_FONT_CHANGE = "flat
 fld public final static java.lang.String USE_JETBRAINS_CUSTOM_DECORATIONS = "flatlaf.useJetBrainsCustomDecorations"
  anno 0 java.lang.Deprecated()
 fld public final static java.lang.String USE_NATIVE_LIBRARY = "flatlaf.useNativeLibrary"
+fld public final static java.lang.String USE_ROUNDED_POPUP_BORDER = "flatlaf.useRoundedPopupBorder"
+fld public final static java.lang.String USE_SUB_MENU_SAFE_TRIANGLE = "flatlaf.useSubMenuSafeTriangle"
 fld public final static java.lang.String USE_TEXT_Y_CORRECTION = "flatlaf.useTextYCorrection"
 fld public final static java.lang.String USE_UBUNTU_FONT = "flatlaf.useUbuntuFont"
 fld public final static java.lang.String USE_WINDOW_DECORATIONS = "flatlaf.useWindowDecorations"
@@ -314,7 +324,7 @@ meth public static boolean setup(java.io.InputStream)
 meth public static com.formdev.flatlaf.FlatLaf createLaf(com.formdev.flatlaf.IntelliJTheme)
 meth public static com.formdev.flatlaf.FlatLaf createLaf(java.io.InputStream) throws java.io.IOException
 supr java.lang.Object
-hfds checkboxDuplicateColors,checkboxKeyMapping,colors,icons,isMaterialUILite,namedColors,ui,uiKeyCopying,uiKeyDoNotOverride,uiKeyExcludes,uiKeyInverseMapping,uiKeyMapping
+hfds checkboxDuplicateColors,checkboxKeyMapping,jsonColors,jsonIcons,jsonUI,namedColors,uiKeyCopying,uiKeyDoNotOverride,uiKeyExcludesContains,uiKeyExcludesStartsWith,uiKeyInverseMapping,uiKeyMapping
 
 CLSS public static com.formdev.flatlaf.IntelliJTheme$ThemeLaf
  outer com.formdev.flatlaf.IntelliJTheme
@@ -409,6 +419,7 @@ innr public static Fade
 innr public static HSLChange
 innr public static HSLIncreaseDecrease
 innr public static Mix
+innr public static Mix2
 meth public !varargs static java.awt.Color applyFunctions(java.awt.Color,com.formdev.flatlaf.util.ColorFunctions$ColorFunction[])
 meth public static float clamp(float)
 meth public static float luma(java.awt.Color)
@@ -470,6 +481,16 @@ meth public java.lang.String toString()
 meth public void apply(float[])
 supr java.lang.Object
 
+CLSS public static com.formdev.flatlaf.util.ColorFunctions$Mix2
+ outer com.formdev.flatlaf.util.ColorFunctions
+cons public init(java.awt.Color,float)
+fld public final float weight
+fld public final java.awt.Color color1
+intf com.formdev.flatlaf.util.ColorFunctions$ColorFunction
+meth public java.lang.String toString()
+meth public void apply(float[])
+supr java.lang.Object
+
 CLSS public com.formdev.flatlaf.util.CubicBezierEasing
 cons public init(float,float,float,float)
 fld public final static com.formdev.flatlaf.util.CubicBezierEasing EASE
@@ -629,16 +650,33 @@ hfds alpha,hsl,rgb
 
 CLSS public com.formdev.flatlaf.util.HiDPIUtils
 cons public init()
+innr public abstract interface static DirtyRegionCallback
 innr public abstract interface static Painter
+innr public static HiDPIRepaintManager
 meth public static float computeTextYCorrection(java.awt.Graphics2D)
 meth public static java.awt.Graphics2D createGraphicsTextYCorrection(java.awt.Graphics2D)
+meth public static void addDirtyRegion(javax.swing.JComponent,int,int,int,int,com.formdev.flatlaf.util.HiDPIUtils$DirtyRegionCallback)
 meth public static void drawStringUnderlineCharAtWithYCorrection(javax.swing.JComponent,java.awt.Graphics2D,java.lang.String,int,int,int)
 meth public static void drawStringWithYCorrection(javax.swing.JComponent,java.awt.Graphics2D,java.lang.String,int,int)
+meth public static void installHiDPIRepaintManager()
 meth public static void paintAtScale1x(java.awt.Graphics2D,int,int,int,int,com.formdev.flatlaf.util.HiDPIUtils$Painter)
 meth public static void paintAtScale1x(java.awt.Graphics2D,javax.swing.JComponent,com.formdev.flatlaf.util.HiDPIUtils$Painter)
+meth public static void repaint(java.awt.Component)
+meth public static void repaint(java.awt.Component,int,int,int,int)
+meth public static void repaint(java.awt.Component,java.awt.Rectangle)
 supr java.lang.Object
 hfds CORRECTION_INTER,CORRECTION_OPEN_SANS,CORRECTION_SEGOE_UI,CORRECTION_TAHOMA,SCALE_FACTORS,useDebugScaleFactor,useTextYCorrection
 
+CLSS public abstract interface static com.formdev.flatlaf.util.HiDPIUtils$DirtyRegionCallback
+ outer com.formdev.flatlaf.util.HiDPIUtils
+meth public abstract void addDirtyRegion(javax.swing.JComponent,int,int,int,int)
+
+CLSS public static com.formdev.flatlaf.util.HiDPIUtils$HiDPIRepaintManager
+ outer com.formdev.flatlaf.util.HiDPIUtils
+cons public init()
+meth public void addDirtyRegion(javax.swing.JComponent,int,int,int,int)
+supr javax.swing.RepaintManager
+
 CLSS public abstract interface static com.formdev.flatlaf.util.HiDPIUtils$Painter
  outer com.formdev.flatlaf.util.HiDPIUtils
 meth public abstract void paint(java.awt.Graphics2D,int,int,int,int,double)
@@ -734,6 +772,7 @@ supr java.lang.Object
 CLSS public com.formdev.flatlaf.util.SystemInfo
 cons public init()
 fld public final static boolean isAARCH64
+fld public final static boolean isGNOME
 fld public final static boolean isJava_11_orLater
 fld public final static boolean isJava_12_orLater
 fld public final static boolean isJava_15_orLater
@@ -750,6 +789,7 @@ fld public final static boolean isMacOS_10_11_ElCapitan_orLater
 fld public final static boolean isMacOS_10_14_Mojave_orLater
 fld public final static boolean isMacOS_10_15_Catalina_orLater
 fld public final static boolean isProjector
+fld public final static boolean isUnknownOS
 fld public final static boolean isWebswing
 fld public final static boolean isWinPE
 fld public final static boolean isWindows
@@ -1137,6 +1177,31 @@ meth public void provideErrorFeedback(java.awt.Component)
 meth public void uninitialize()
 supr java.lang.Object
 
+CLSS public javax.swing.RepaintManager
+cons public init()
+meth public boolean isCompletelyDirty(javax.swing.JComponent)
+meth public boolean isDoubleBufferingEnabled()
+meth public java.awt.Dimension getDoubleBufferMaximumSize()
+meth public java.awt.Image getOffscreenBuffer(java.awt.Component,int,int)
+meth public java.awt.Image getVolatileOffscreenBuffer(java.awt.Component,int,int)
+meth public java.awt.Rectangle getDirtyRegion(javax.swing.JComponent)
+meth public java.lang.String toString()
+meth public static javax.swing.RepaintManager currentManager(java.awt.Component)
+meth public static javax.swing.RepaintManager currentManager(javax.swing.JComponent)
+meth public static void setCurrentManager(javax.swing.RepaintManager)
+meth public void addDirtyRegion(java.applet.Applet,int,int,int,int)
+meth public void addDirtyRegion(java.awt.Window,int,int,int,int)
+meth public void addDirtyRegion(javax.swing.JComponent,int,int,int,int)
+meth public void addInvalidComponent(javax.swing.JComponent)
+meth public void markCompletelyClean(javax.swing.JComponent)
+meth public void markCompletelyDirty(javax.swing.JComponent)
+meth public void paintDirtyRegions()
+meth public void removeInvalidComponent(javax.swing.JComponent)
+meth public void setDoubleBufferMaximumSize(java.awt.Dimension)
+meth public void setDoubleBufferingEnabled(boolean)
+meth public void validateInvalidComponents()
+supr java.lang.Object
+
 CLSS public abstract javax.swing.border.AbstractBorder
 cons public init()
 intf java.io.Serializable

flatlaf-core/src/main/java/com/formdev/flatlaf/FlatClientProperties.java

@@ -21,6 +21,8 @@ import java.awt.IllegalComponentStateException;
 import java.awt.Window;
 import java.util.Objects;
 import javax.swing.JComponent;
+import javax.swing.JFormattedTextField;
+import javax.swing.JSpinner;
 import javax.swing.SwingConstants;
 
 /**
@@ -220,6 +222,7 @@ public interface FlatClientProperties
 	 * <strong>Allowed Values</strong>
 	 *     {@link #OUTLINE_ERROR},
 	 *     {@link #OUTLINE_WARNING},
+	 *     {@link #OUTLINE_SUCCESS},
 	 *     any color (type {@link java.awt.Color}) or
 	 *     an array of two colors (type {@link java.awt.Color}[2]) where the first color
 	 *     is for focused state and the second for unfocused state
@@ -240,6 +243,14 @@ public interface FlatClientProperties
 	 */
 	String OUTLINE_WARNING = "warning";
 
+	/**
+	 * Paint the component border in another color (usually greenish) to indicate a success.
+	 *
+	 * @see #OUTLINE
+	 * @since 3.6
+	 */
+	String OUTLINE_SUCCESS = "success";
+
 	/**
 	 * Specifies a callback that is invoked to check whether a component is permanent focus owner.
 	 * Used to paint focus indicators.
@@ -461,7 +472,7 @@ public interface FlatClientProperties
 	 * {@link FlatSystemProperties#USE_WINDOW_DECORATIONS}, but higher priority
 	 * than UI default {@code TitlePane.useWindowDecorations}.
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
@@ -481,7 +492,7 @@ public interface FlatClientProperties
 	 * {@link FlatSystemProperties#MENUBAR_EMBEDDED}, but higher priority
 	 * than UI default {@code TitlePane.menuBarEmbedded}.
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
@@ -507,6 +518,8 @@ public interface FlatClientProperties
 	 * The user can left-click-and-drag on the title bar area to move the window,
 	 * except when clicking on a component that processes mouse events (e.g. buttons or menus).
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -537,7 +550,7 @@ public interface FlatClientProperties
 	 * <p>
 	 * This client property has higher priority than UI default {@code TitlePane.showIcon}.
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
@@ -553,6 +566,8 @@ public interface FlatClientProperties
 	 * Setting this shows/hides the windows title
 	 * for the {@code JFrame} or {@code JDialog} that contains the root pane.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -567,6 +582,8 @@ public interface FlatClientProperties
 	 * Setting this shows/hides the "iconify" button
 	 * for the {@code JFrame} that contains the root pane.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -581,6 +598,8 @@ public interface FlatClientProperties
 	 * Setting this shows/hides the "maximize/restore" button
 	 * for the {@code JFrame} that contains the root pane.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -595,6 +614,8 @@ public interface FlatClientProperties
 	 * Setting this shows/hides the "close" button
 	 * for the {@code JFrame} or {@code JDialog} that contains the root pane.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -605,7 +626,7 @@ public interface FlatClientProperties
 	/**
 	 * Background color of window title bar (requires enabled window decorations).
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.awt.Color}
@@ -617,7 +638,7 @@ public interface FlatClientProperties
 	/**
 	 * Foreground color of window title bar (requires enabled window decorations).
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.awt.Color}
@@ -626,10 +647,24 @@ public interface FlatClientProperties
 	 */
 	String TITLE_BAR_FOREGROUND = "JRootPane.titleBarForeground";
 
+	/**
+	 * Specifies the preferred height of title bar (requires enabled window decorations).
+	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Integer}
+	 *
+	 * @since 3.5.2
+	 */
+	String TITLE_BAR_HEIGHT = "JRootPane.titleBarHeight";
+
 	/**
 	 * Specifies whether the glass pane should have full height and overlap the title bar,
 	 * if FlatLaf window decorations are enabled. Default is {@code false}.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -1176,12 +1211,15 @@ public interface FlatClientProperties
 	/**
 	 * Specifies whether all text is selected when the text component gains focus.
 	 * <p>
-	 * <strong>Component</strong> {@link javax.swing.JTextField} (and subclasses)<br>
+	 * <strong>Components</strong> {@link javax.swing.text.JTextComponent} (and subclasses),
+	 * {@link javax.swing.JComboBox} (since 3.6) and {@link javax.swing.JSpinner} (since 3.6)<br>
 	 * <strong>Value type</strong> {@link java.lang.String}<br>
 	 * <strong>Allowed Values</strong>
 	 *     {@link #SELECT_ALL_ON_FOCUS_POLICY_NEVER},
 	 *     {@link #SELECT_ALL_ON_FOCUS_POLICY_ONCE} (default) or
 	 *     {@link #SELECT_ALL_ON_FOCUS_POLICY_ALWAYS}
+	 *
+	 * @see #SELECT_ALL_ON_MOUSE_CLICK
 	 */
 	String SELECT_ALL_ON_FOCUS_POLICY = "JTextField.selectAllOnFocusPolicy";
 
@@ -1196,6 +1234,12 @@ public interface FlatClientProperties
 	 * Select all text when the text component gains focus for the first time
 	 * and selection was not modified (is at end of text).
 	 * This is the default.
+	 * <p>
+	 * <b>Limitations:</b>
+	 * For {@link JFormattedTextField} and {@link JSpinner} this behaves
+	 * as {@link #SELECT_ALL_ON_FOCUS_POLICY_ALWAYS}.
+     * This is because of special behavior of {@link JFormattedTextField}
+     * that did not allow implementation of {@code "once"}.
 	 *
 	 * @see #SELECT_ALL_ON_FOCUS_POLICY
 	 */
@@ -1208,6 +1252,19 @@ public interface FlatClientProperties
 	 */
 	String SELECT_ALL_ON_FOCUS_POLICY_ALWAYS = "always";
 
+	/**
+	 * Specifies whether all text is selected when when clicking with the mouse
+	 * into the text field (and if "select all on focus" policy is enabled).
+	 * <p>
+	 * <strong>Components</strong> {@link javax.swing.text.JTextComponent} (and subclasses),
+	 * {@link javax.swing.JComboBox} and {@link javax.swing.JSpinner}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 *
+	 * @see #SELECT_ALL_ON_FOCUS_POLICY
+	 * @since 3.6
+	 */
+	String SELECT_ALL_ON_MOUSE_CLICK = "JTextField.selectAllOnMouseClick";
+
 	/**
 	 * Placeholder text that is only painted if the text field is empty.
 	 * <p>
@@ -1386,13 +1443,23 @@ public interface FlatClientProperties
 	//---- JTree --------------------------------------------------------------
 
 	/**
-	 * Override if a tree shows a wide selection. Default is {@code true}.
+	 * Specifies whether tree shows a wide selection. Default is {@code true}.
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JTree}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 */
 	String TREE_WIDE_SELECTION = "JTree.wideSelection";
 
+	/**
+	 * Specifies whether tree uses a wide cell renderer. Default is {@code false}.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JTree}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 *
+	 * @since 3.6
+	 */
+	String TREE_WIDE_CELL_RENDERER = "JTree.wideCellRenderer";
+
 	/**
 	 * Specifies whether tree item selection is painted. Default is {@code true}.
 	 * If set to {@code false}, then the tree cell renderer is responsible for painting selection.

flatlaf-core/src/main/java/com/formdev/flatlaf/FlatLaf.java

@@ -20,6 +20,7 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.EventQueue;
 import java.awt.Font;
+import java.awt.GraphicsEnvironment;
 import java.awt.Image;
 import java.awt.RenderingHints;
 import java.awt.Toolkit;
@@ -36,6 +37,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Enumeration;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -43,6 +45,7 @@ import java.util.MissingResourceException;
 import java.util.Properties;
 import java.util.ResourceBundle;
 import java.util.ServiceLoader;
+import java.util.Set;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.IntUnaryOperator;
@@ -99,6 +102,8 @@ public abstract class FlatLaf
 	private static Map<String, String> globalExtraDefaults;
 	private Map<String, String> extraDefaults;
 	private static Function<String, Color> systemColorGetter;
+	private static Set<String> uiKeyPlatformPrefixes;
+	private static Set<String> uiKeySpecialPrefixes;
 
 	private String desktopPropertyName;
 	private String desktopPropertyName2;
@@ -110,6 +115,7 @@ public abstract class FlatLaf
 	private PopupFactory oldPopupFactory;
 	private MnemonicHandler mnemonicHandler;
 	private boolean subMenuUsabilityHelperInstalled;
+	private LinuxPopupMenuCanceler linuxPopupMenuCanceler;
 
 	private Consumer<UIDefaults> postInitialization;
 	private List<Function<Object, Object>> uiDefaultsGetters;
@@ -119,6 +125,46 @@ public abstract class FlatLaf
 	private static String preferredSemiboldFontFamily;
 	private static String preferredMonospacedFontFamily;
 
+	static {
+		// see disableWindowsD3Donscreen() for details
+		// https://github.com/JFormDesigner/FlatLaf/issues/887
+		if( SystemInfo.isWindows &&
+			System.getProperty( "sun.java2d.d3d.onscreen" ) == null &&
+			System.getProperty( "sun.java2d.d3d" ) == null &&
+			System.getProperty( "sun.java2d.noddraw" ) == null )
+		  System.setProperty( "sun.java2d.d3d.onscreen", "false" );
+	}
+
+	/**
+	 * Disable usage of Windows Direct3D (DirectX) onscreen surfaces because this may lead to
+	 * repaint issues (ghosting) on some systems (probably depending on graphics card/driver).
+	 * Problem occurs usually when a small heavy-weight popup window (menu, combobox, tooltip) is shown.
+	 * <p>
+	 * Sets system property {@code sun.java2d.d3d.onscreen} to {@code false},
+	 * but only if {@code sun.java2d.d3d.onscreen}, {@code sun.java2d.d3d}
+	 * and {@code sun.java2d.noddraw} are not yet set.
+	 * <p>
+	 * <strong>Note</strong>: Must be invoked very early before the graphics environment is created.
+	 * <p>
+	 * This method is automatically invoked when loading this class,
+	 * which is usually before the graphics environment is created.
+	 * E.g. when doing {@code FlatLightLaf.setup()} or
+	 * {@code UIManager.setLookAndFeel( "com.formdev.flatlaf.FlatLightLaf" )}.
+	 * <p>
+	 * However, it may be invoked too late if you use some methods from {@link UIManager}
+	 * of {@link GraphicsEnvironment} before setting look and feel.
+	 * E.g. {@link UIManager#put(Object, Object)}.
+	 * In that case invoke this method yourself very early.
+	 * <p>
+	 * <strong>Tip</strong>: How to find out when the graphics environment is created?
+	 * Set a breakpoint at constructor of class {@link GraphicsEnvironment} and look at the stack.
+	 *
+	 * @since 3.5.2
+	 */
+	public static void disableWindowsD3Donscreen() {
+		// dummy method used to trigger invocation of "static {...}" block
+	}
+
 	/**
 	 * Sets the application look and feel to the given LaF
 	 * using {@link UIManager#setLookAndFeel(javax.swing.LookAndFeel)}.
@@ -264,6 +310,10 @@ public abstract class FlatLaf
 		// install submenu usability helper
 		subMenuUsabilityHelperInstalled = SubMenuUsabilityHelper.install();
 
+		// install Linux popup menu canceler
+		if( SystemInfo.isLinux )
+			linuxPopupMenuCanceler = new LinuxPopupMenuCanceler();
+
 		// listen to desktop property changes to update UI if system font or scaling changes
 		if( SystemInfo.isWindows ) {
 			// Windows 10 allows increasing font size independent of scaling:
@@ -356,6 +406,12 @@ public abstract class FlatLaf
 			subMenuUsabilityHelperInstalled = false;
 		}
 
+		// uninstall Linux popup menu canceler
+		if( linuxPopupMenuCanceler != null ) {
+			linuxPopupMenuCanceler.uninstall();
+			linuxPopupMenuCanceler = null;
+		}
+
 		// restore default link color
 		new HTMLEditorKit().getStyleSheet().addRule( "a, address { color: blue; }" );
 		postInitialization = null;
@@ -469,10 +525,10 @@ public abstract class FlatLaf
 
 		// load defaults from properties
 		List<Class<?>> lafClassesForDefaultsLoading = getLafClassesForDefaultsLoading();
-		if( lafClassesForDefaultsLoading != null )
+		if( lafClassesForDefaultsLoading == null )
-			UIDefaultsLoader.loadDefaultsFromProperties( lafClassesForDefaultsLoading, addons, getAdditionalDefaults(), isDark(), defaults );
+			lafClassesForDefaultsLoading = UIDefaultsLoader.getLafClassesForDefaultsLoading( getClass() );
-		else
+		UIDefaultsLoader.loadDefaultsFromProperties( lafClassesForDefaultsLoading, addons,
-			UIDefaultsLoader.loadDefaultsFromProperties( getClass(), addons, getAdditionalDefaults(), isDark(), defaults );
+			this::applyAdditionalProperties, getAdditionalDefaults(), isDark(), defaults );
 
 		// setup default font after loading defaults from properties
 		// to allow defining "defaultFont" in properties
@@ -489,9 +545,6 @@ public abstract class FlatLaf
 		// initialize text antialiasing
 		putAATextInfo( defaults );
 
-		// apply additional defaults (e.g. from IntelliJ themes)
-		applyAdditionalDefaults( defaults );
-
 		// allow addons modifying UI defaults
 		for( FlatDefaultsAddon addon : addons )
 			addon.afterDefaultsLoading( this, defaults );
@@ -501,6 +554,9 @@ public abstract class FlatLaf
 			return UIScale.getUserScaleFactor();
 		} );
 
+		// add lazy UI delegate class loading (if necessary)
+		addLazyUIdelegateClassLoading( defaults );
+
 		if( postInitialization != null ) {
 			postInitialization.accept( defaults );
 			postInitialization = null;
@@ -509,7 +565,8 @@ public abstract class FlatLaf
 		return defaults;
 	}
 
-	void applyAdditionalDefaults( UIDefaults defaults ) {
+	// apply additional properties (e.g. from IntelliJ themes)
+	void applyAdditionalProperties( Properties properties ) {
 	}
 
 	protected List<Class<?>> getLafClassesForDefaultsLoading() {
@@ -698,6 +755,53 @@ public abstract class FlatLaf
 		}
 	}
 
+	/**
+	 * Handle UI delegate classes if running in special application where multiple class loaders are involved.
+	 * E.g. in Eclipse plugin or in LibreOffice extension.
+	 * <p>
+	 * Problem: Swing runs in Java's system classloader and FlatLaf is loaded in plugin classloader.
+	 * When Swing tries to load UI delegate class in {@link UIDefaults#getUIClass(String, ClassLoader)},
+	 * invoked from {@link UIDefaults#getUI(JComponent)}, it uses the component's classloader,
+	 * which is Java's system classloader for core Swing components,
+	 * and can not find FlatLaf UI delegates.
+	 * <p>
+	 * Solution: Add lazy values for UI delegate class names.
+	 * Those lazy values use FlatLaf classloader to load UI delegate class.
+	 * This is similar to what {@link UIDefaults#getUIClass(String, ClassLoader)} does.
+	 * <p>
+	 * Not using {@code defaults.put( "ClassLoader", FlatLaf.class.getClassLoader() )},
+	 * which would work for FlatLaf UI delegates, but it would break custom
+	 * UI delegates used in other classloaders.
+	 */
+	private static void addLazyUIdelegateClassLoading( UIDefaults defaults ) {
+		if( FlatLaf.class.getClassLoader() == ClassLoader.getSystemClassLoader() )
+			return; // not necessary
+
+		Map<String, LazyValue> map = new HashMap<>();
+		for( Map.Entry<Object, Object> e : defaults.entrySet() ) {
+			Object key = e.getKey();
+			Object value = e.getValue();
+			if( key instanceof String && ((String)key).endsWith( "UI" ) &&
+				value instanceof String && !defaults.containsKey( value ) )
+			{
+				String className = (String) value;
+				map.put( className, (LazyValue) t -> {
+					try {
+						Class<?> uiClass = FlatLaf.class.getClassLoader().loadClass( className );
+						if( ComponentUI.class.isAssignableFrom( uiClass ) )
+							return uiClass;
+					} catch( ClassNotFoundException ex ) {
+						// ignore
+					}
+
+					// let UIDefaults.getUIClass() try to load UI delegate class
+					return null;
+				} );
+			}
+		}
+		defaults.putAll( map );
+	}
+
 	private void putAATextInfo( UIDefaults defaults ) {
 		if ( SystemInfo.isMacOS && SystemInfo.isJetBrainsJVM ) {
 			// The awt.font.desktophints property suggests sub-pixel anti-aliasing
@@ -1022,6 +1126,92 @@ public abstract class FlatLaf
 		FlatLaf.systemColorGetter = systemColorGetter;
 	}
 
+	/**
+	 * Returns UI key prefix, used in FlatLaf properties files, for light or dark themes.
+	 * Return value is either {@code [light]} or {@code [dark]}.
+	 *
+	 * @since 3.6
+	 */
+	public static String getUIKeyLightOrDarkPrefix( boolean dark ) {
+		return dark ? "[dark]" : "[light]";
+	}
+
+	/**
+	 * Returns set of UI key prefixes, used in FlatLaf properties files, for current platform.
+	 * If UI keys in properties files start with a prefix (e.g. {@code [someprefix]Button.background}),
+	 * then they are only used if that prefix is contained in this set
+	 * (or is one of {@code [light]} or {@code [dark]} depending on current theme).
+	 * <p>
+	 * By default, the set contains one or more of following prefixes:
+	 * <ul>
+	 *   <li>{@code [win]} on Windows
+	 *   <li>{@code [mac]} on macOS
+	 *   <li>{@code [linux]} on Linux
+	 *   <li>{@code [unknown]} on other platforms
+	 *   <li>{@code [gnome]} on Linux with GNOME desktop environment
+	 *   <li>{@code [kde]} on Linux with KDE desktop environment
+	 *   <li>on Linux, the value of the environment variable {@code XDG_CURRENT_DESKTOP},
+	 *       split at colons and converted to lower case (e.g. if value of  {@code XDG_CURRENT_DESKTOP}
+	 *       is {@code ubuntu:GNOME}, then {@code [ubuntu]} and {@code [gnome]})
+	 * </ul>
+	 * <p>
+	 * You can add own prefixes to the set.
+	 * The prefixes must start with '[' and end with ']' characters, otherwise they will be ignored.
+	 *
+	 * @since 3.6
+	 */
+	public static Set<String> getUIKeyPlatformPrefixes() {
+		if( uiKeyPlatformPrefixes == null ) {
+			uiKeyPlatformPrefixes = new HashSet<>();
+			uiKeyPlatformPrefixes.add(
+				SystemInfo.isWindows ? "[win]" :
+				SystemInfo.isMacOS ? "[mac]" :
+				SystemInfo.isLinux ? "[linux]" : "[unknown]" );
+
+			// Linux
+			if( SystemInfo.isLinux ) {
+				if( SystemInfo.isGNOME )
+					uiKeyPlatformPrefixes.add( "[gnome]" );
+				else if( SystemInfo.isKDE )
+					uiKeyPlatformPrefixes.add( "[kde]" );
+
+				// add values from XDG_CURRENT_DESKTOP for other desktops
+				String desktop = System.getenv( "XDG_CURRENT_DESKTOP" );
+				if( desktop != null ) {
+					// XDG_CURRENT_DESKTOP is a colon-separated list of strings
+					// https://specifications.freedesktop.org/desktop-entry-spec/latest/recognized-keys.html#key-onlyshowin
+					// e.g. "ubuntu:GNOME" on Ubuntu 24.10 or "GNOME-Classic:GNOME" on CentOS 7
+					for( String desk : StringUtils.split( desktop.toLowerCase( Locale.ENGLISH ), ':', true, true ) )
+						uiKeyPlatformPrefixes.add( '[' + desk + ']' );
+				}
+			}
+		}
+		return uiKeyPlatformPrefixes;
+	}
+
+	/**
+	 * Returns set of special UI key prefixes, used in FlatLaf properties files.
+	 * Unlike other prefixes, properties with special prefixes are preserved.
+	 * You can access them using `UIManager`. E.g. `UIManager.get( "[someSpecialPrefix]someKey" )`.
+	 * <p>
+	 * By default, the set contains following special prefixes:
+	 * <ul>
+	 *   <li>{@code [style]}
+	 * </ul>
+	 * <p>
+	 * You can add own prefixes to the set.
+	 * The prefixes must start with '[' and end with ']' characters, otherwise they will be ignored.
+	 *
+	 * @since 3.6
+	 */
+	public static Set<String> getUIKeySpecialPrefixes() {
+		if( uiKeySpecialPrefixes == null ) {
+			uiKeySpecialPrefixes = new HashSet<>();
+			uiKeySpecialPrefixes.add( "[style]" );
+		}
+		return uiKeySpecialPrefixes;
+	}
+
 	private static void reSetLookAndFeel() {
 		EventQueue.invokeLater( () -> {
 			LookAndFeel lookAndFeel = UIManager.getLookAndFeel();

flatlaf-core/src/main/java/com/formdev/flatlaf/FlatPropertiesLaf.java

@@ -23,13 +23,15 @@ import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.Locale;
 import java.util.Properties;
+import com.formdev.flatlaf.themes.FlatMacDarkLaf;
+import com.formdev.flatlaf.themes.FlatMacLightLaf;
 
 /**
  * A Flat LaF that is able to load UI defaults from properties passed to the constructor.
  * <p>
  * Specify the base theme in the properties with {@code @baseTheme=<baseTheme>}.
  * Allowed values for {@code <baseTheme>} are {@code light} (the default), {@code dark},
- * {@code intellij} or {@code darcula}.
+ * {@code intellij}, {@code darcula}, {@code maclight} or {@code macdark}.
  * <p>
  * The properties are applied after loading the base theme and may overwrite base properties.
  * All features of FlatLaf properties files are available.
@@ -71,7 +73,8 @@ public class FlatPropertiesLaf
 		this.properties = properties;
 
 		baseTheme = properties.getProperty( "@baseTheme", "light" );
-		dark = "dark".equalsIgnoreCase( baseTheme ) || "darcula".equalsIgnoreCase( baseTheme );
+		dark = "dark".equalsIgnoreCase( baseTheme ) || "darcula".equalsIgnoreCase( baseTheme ) ||
+			"macdark".equalsIgnoreCase( baseTheme );
 	}
 
 	@Override
@@ -116,6 +119,16 @@ public class FlatPropertiesLaf
 				lafClasses.add( FlatDarkLaf.class );
 				lafClasses.add( FlatDarculaLaf.class );
 				break;
+
+			case "maclight":
+				lafClasses.add( FlatLightLaf.class );
+				lafClasses.add( FlatMacLightLaf.class );
+				break;
+
+			case "macdark":
+				lafClasses.add( FlatDarkLaf.class );
+				lafClasses.add( FlatMacDarkLaf.class );
+				break;
 		}
 		return lafClasses;
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/FlatSystemProperties.java

@@ -82,7 +82,7 @@ public interface FlatSystemProperties
 	 * {@link FlatClientProperties#USE_WINDOW_DECORATIONS} and
 	 * UI default {@code TitlePane.useWindowDecorations}.
 	 * <p>
-	 * (requires Window 10/11)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
 	 * <strong>Default</strong> none
@@ -99,7 +99,7 @@ public interface FlatSystemProperties
 	 * Setting this to {@code false} disables using JetBrains Runtime custom window decorations.
 	 * Then FlatLaf native window decorations are used.
 	 * <p>
-	 * (requires Window 10/11)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
 	 * <strong>Default</strong> {@code false} (since v2; was {@code true} in v1)
@@ -120,7 +120,7 @@ public interface FlatSystemProperties
 	 * {@link FlatClientProperties#MENU_BAR_EMBEDDED} and
 	 * UI default {@code TitlePane.menuBarEmbedded}.
 	 * <p>
-	 * (requires Window 10/11)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
 	 * <strong>Default</strong> none
@@ -135,6 +135,18 @@ public interface FlatSystemProperties
 	 */
 	String ANIMATION = "flatlaf.animation";
 
+	/**
+	 * Specifies whether native rounded popup borders should be used (if supported by operating system).
+	 * <p>
+	 * (requires Windows 11 or macOS)
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}; except in FlatLaf 3.5.x on macOS 14.4+ where it was {@code false}
+	 *
+	 * @since 3.5.2
+	 */
+	String USE_ROUNDED_POPUP_BORDER = "flatlaf.useRoundedPopupBorder";
+
 	/**
 	 * Specifies whether vertical text position is corrected when UI is scaled on HiDPI screens.
 	 * <p>
@@ -204,6 +216,16 @@ public interface FlatSystemProperties
 	 */
 	String NATIVE_LIBRARY_PATH = "flatlaf.nativeLibraryPath";
 
+	/**
+	 * Specifies whether safe triangle is used to improve usability of submenus.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}
+	 *
+	 * @since 3.5.1
+	 */
+	String USE_SUB_MENU_SAFE_TRIANGLE = "flatlaf.useSubMenuSafeTriangle";
+
 	/**
 	 * Checks whether a system property is set and returns {@code true} if its value
 	 * is {@code "true"} (case-insensitive), otherwise it returns {@code false}.

flatlaf-core/src/main/java/com/formdev/flatlaf/IntelliJTheme.java

@@ -16,7 +16,6 @@
 
 package com.formdev.flatlaf;
 
-import java.awt.Color;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
@@ -25,20 +24,16 @@ import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
-import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Properties;
 import java.util.Set;
-import java.util.Map.Entry;
-import javax.swing.UIDefaults;
-import javax.swing.plaf.ColorUIResource;
 import com.formdev.flatlaf.json.Json;
 import com.formdev.flatlaf.json.ParseException;
-import com.formdev.flatlaf.util.ColorFunctions;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.StringUtils;
 import com.formdev.flatlaf.util.SystemInfo;
@@ -63,13 +58,11 @@ public class IntelliJTheme
 	public final boolean dark;
 	public final String author;
 
-	private final boolean isMaterialUILite;
+	private Map<String, String> jsonColors;
+	private Map<String, Object> jsonUI;
+	private Map<String, Object> jsonIcons;
 
-	private Map<String, String> colors;
+	private Map<String, String> namedColors = Collections.emptyMap();
-	private Map<String, Object> ui;
-	private Map<String, Object> icons;
-
-	private Map<String, ColorUIResource> namedColors = Collections.emptyMap();
 
 	/**
 	 * Loads a IntelliJ .theme.json file from the given input stream,
@@ -84,7 +77,7 @@ public class IntelliJTheme
 		try {
 		    return FlatLaf.setup( createLaf( in ) );
 		} catch( Exception ex ) {
-			LoggingFacade.INSTANCE.logSevere(  "FlatLaf: Failed to load IntelliJ theme", ex );
+			LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to load IntelliJ theme", ex );
 		    return false;
 		}
 	}
@@ -138,94 +131,90 @@ public class IntelliJTheme
 	    dark = Boolean.parseBoolean( (String) json.get( "dark" ) );
 	    author = (String) json.get( "author" );
 
-		isMaterialUILite = author.equals( "Mallowigi" );
+	    jsonColors = (Map<String, String>) json.get( "colors" );
-
+	    jsonUI = (Map<String, Object>) json.get( "ui" );
-	    colors = (Map<String, String>) json.get( "colors" );
+	    jsonIcons = (Map<String, Object>) json.get( "icons" );
-	    ui = (Map<String, Object>) json.get( "ui" );
-	    icons = (Map<String, Object>) json.get( "icons" );
 	}
 
-	private void applyProperties( UIDefaults defaults ) {
+	private void applyProperties( Properties properties ) {
-		if( ui == null )
+		if( jsonUI == null )
 			return;
 
-		defaults.put( "Component.isIntelliJTheme", true );
+		put( properties, "Component.isIntelliJTheme", "true" );
 
 		// enable button shadows
-		defaults.put( "Button.paintShadow", true );
+		put( properties, "Button.paintShadow", "true" );
-		defaults.put( "Button.shadowWidth", dark ? 2 : 1 );
+		put( properties, "Button.shadowWidth", dark ? "2" : "1" );
 
-		Map<Object, Object> themeSpecificDefaults = removeThemeSpecificDefaults( defaults );
+		Map<String, String> themeSpecificProps = removeThemeSpecificProps( properties );
+		Set<String> jsonUIKeys = new HashSet<>();
 
-		loadNamedColors( defaults );
+		// Json node "colors"
+		loadNamedColors( properties, jsonUIKeys );
 
-		// convert Json "ui" structure to UI defaults
+		// convert Json "ui" structure to UI properties
-		ArrayList<Object> defaultsKeysCache = new ArrayList<>();
+		for( Map.Entry<String, Object> e : jsonUI.entrySet() )
-		Set<String> uiKeys = new HashSet<>();
+			apply( e.getKey(), e.getValue(), properties, jsonUIKeys );
-		for( Map.Entry<String, Object> e : ui.entrySet() )
-			apply( e.getKey(), e.getValue(), defaults, defaultsKeysCache, uiKeys );
 
-		applyColorPalette( defaults );
+		// set FlatLaf variables
-		applyCheckBoxColors( defaults );
+		copyIfSetInJson( properties, jsonUIKeys, "@background", "Panel.background", "*.background" );
+		copyIfSetInJson( properties, jsonUIKeys, "@foreground", "CheckBox.foreground", "*.foreground" );
+		copyIfSetInJson( properties, jsonUIKeys, "@accentBaseColor",
+			"ColorPalette.accent", // Material UI Lite, Hiberbee
+			"ColorPalette.accentColor", // Dracula, One Dark
+			"ProgressBar.foreground",
+			"*.selectionBackground" );
+		copyIfSetInJson( properties, jsonUIKeys, "@accentUnderlineColor", "*.underlineColor", "TabbedPane.underlineColor" );
+		copyIfSetInJson( properties, jsonUIKeys, "@selectionBackground", "*.selectionBackground" );
+		copyIfSetInJson( properties, jsonUIKeys, "@selectionForeground", "*.selectionForeground" );
+		copyIfSetInJson( properties, jsonUIKeys, "@selectionInactiveBackground", "*.selectionInactiveBackground" );
+		copyIfSetInJson( properties, jsonUIKeys, "@selectionInactiveForeground", "*.selectionInactiveForeground" );
+
+		// Json node "icons/ColorPalette"
+		applyIconsColorPalette( properties );
+
+		// apply "CheckBox.icon." colors
+		applyCheckBoxColors( properties );
 
 		// copy values
 		for( Map.Entry<String, String> e : uiKeyCopying.entrySet() ) {
-			Object value = defaults.get( e.getValue() );
+			Object value = properties.get( e.getValue() );
 			if( value != null )
-				defaults.put( e.getKey(), value );
+				put( properties, e.getKey(), value );
 		}
 
 		// IDEA does not paint button background if disabled, but FlatLaf does
-		Object panelBackground = defaults.get( "Panel.background" );
+		put( properties, "Button.disabledBackground", "@disabledBackground" );
-		defaults.put( "Button.disabledBackground", panelBackground );
+		put( properties, "ToggleButton.disabledBackground", "@disabledBackground" );
-		defaults.put( "ToggleButton.disabledBackground", panelBackground );
 
-		// fix Button borders
+		// fix Button
-		copyIfNotSet( defaults, "Button.focusedBorderColor", "Component.focusedBorderColor", uiKeys );
+		fixStartEnd( properties, jsonUIKeys, "Button.startBackground", "Button.endBackground", "Button.background" );
-		defaults.put( "Button.hoverBorderColor", defaults.get( "Button.focusedBorderColor" ) );
+		fixStartEnd( properties, jsonUIKeys, "Button.startBorderColor", "Button.endBorderColor", "Button.borderColor" );
-		defaults.put( "HelpButton.hoverBorderColor", defaults.get( "Button.focusedBorderColor" ) );
+		fixStartEnd( properties, jsonUIKeys, "Button.default.startBackground", "Button.default.endBackground", "Button.default.background" );
-
+		fixStartEnd( properties, jsonUIKeys, "Button.default.startBorderColor", "Button.default.endBorderColor", "Button.default.borderColor" );
-		// IDEA uses an SVG icon for the help button, but paints the background with Button.startBackground and Button.endBackground
-		Object helpButtonBackground = defaults.get( "Button.startBackground" );
-		Object helpButtonBorderColor = defaults.get( "Button.startBorderColor" );
-		if( helpButtonBackground == null )
-			helpButtonBackground = defaults.get( "Button.background" );
-		if( helpButtonBorderColor == null )
-			helpButtonBorderColor = defaults.get( "Button.borderColor" );
-		defaults.put( "HelpButton.background", helpButtonBackground );
-		defaults.put( "HelpButton.borderColor", helpButtonBorderColor );
-		defaults.put( "HelpButton.disabledBackground", panelBackground );
-		defaults.put( "HelpButton.disabledBorderColor", defaults.get( "Button.disabledBorderColor" ) );
-		defaults.put( "HelpButton.focusedBorderColor", defaults.get( "Button.focusedBorderColor" ) );
-		defaults.put( "HelpButton.focusedBackground", defaults.get( "Button.focusedBackground" ) );
 
 		// IDEA uses TextField.background for editable ComboBox and Spinner
-		Object textFieldBackground = get( defaults, themeSpecificDefaults, "TextField.background" );
+		Object textFieldBackground = get( properties, themeSpecificProps, "TextField.background" );
-		defaults.put( "ComboBox.editableBackground", textFieldBackground );
+		put( properties, "ComboBox.editableBackground", textFieldBackground );
-		defaults.put( "Spinner.background", textFieldBackground );
+		put( properties, "Spinner.background", textFieldBackground );
-
-		// Spinner arrow button always has same colors as ComboBox arrow button
-		defaults.put( "Spinner.buttonBackground", defaults.get( "ComboBox.buttonEditableBackground" ) );
-		defaults.put( "Spinner.buttonArrowColor", defaults.get( "ComboBox.buttonArrowColor" ) );
-		defaults.put( "Spinner.buttonDisabledArrowColor", defaults.get( "ComboBox.buttonDisabledArrowColor" ) );
 
 		// some themes specify colors for TextField.background, but forget to specify it for other components
 		// (probably because those components are not used in IntelliJ IDEA)
-		putAll( defaults, textFieldBackground,
+		putAll( properties, textFieldBackground,
 			"EditorPane.background",
 			"FormattedTextField.background",
 			"PasswordField.background",
 			"TextArea.background",
 			"TextPane.background"
 		);
-		putAll( defaults, get( defaults, themeSpecificDefaults, "TextField.selectionBackground" ),
+		putAll( properties, get( properties, themeSpecificProps, "TextField.selectionBackground" ),
 			"EditorPane.selectionBackground",
 			"FormattedTextField.selectionBackground",
 			"PasswordField.selectionBackground",
 			"TextArea.selectionBackground",
 			"TextPane.selectionBackground"
 		);
-		putAll( defaults, get( defaults, themeSpecificDefaults, "TextField.selectionForeground" ),
+		putAll( properties, get( properties, themeSpecificProps, "TextField.selectionForeground" ),
 			"EditorPane.selectionForeground",
 			"FormattedTextField.selectionForeground",
 			"PasswordField.selectionForeground",
@@ -235,7 +224,7 @@ public class IntelliJTheme
 
 		// fix disabled and not-editable backgrounds for text components, combobox and spinner
 		// (IntelliJ IDEA does not use those colors; instead it used background color of parent)
-		putAll( defaults, panelBackground,
+		putAll( properties, "@disabledBackground",
 			"ComboBox.disabledBackground",
 			"EditorPane.disabledBackground", "EditorPane.inactiveBackground",
 			"FormattedTextField.disabledBackground", "FormattedTextField.inactiveBackground",
@@ -246,132 +235,148 @@ public class IntelliJTheme
 			"TextPane.disabledBackground", "TextPane.inactiveBackground"
 		);
 
-		// fix ToggleButton
-		if( !uiKeys.contains( "ToggleButton.startBackground" ) && !uiKeys.contains( "*.startBackground" ) )
-			defaults.put( "ToggleButton.startBackground", defaults.get( "Button.startBackground" ) );
-		if( !uiKeys.contains( "ToggleButton.endBackground" ) && !uiKeys.contains( "*.endBackground" ) )
-			defaults.put( "ToggleButton.endBackground", defaults.get( "Button.endBackground" ) );
-		if( !uiKeys.contains( "ToggleButton.foreground" ) && uiKeys.contains( "Button.foreground" ) )
-			defaults.put( "ToggleButton.foreground", defaults.get( "Button.foreground" ) );
-
 		// fix DesktopPane background (use Panel.background and make it 5% darker/lighter)
-		Color desktopBackgroundBase = defaults.getColor( "Panel.background" );
+		put( properties, "Desktop.background", dark ? "lighten($Panel.background,5%)" : "darken($Panel.background,5%)" );
-		Color desktopBackground = ColorFunctions.applyFunctions( desktopBackgroundBase,
-			new ColorFunctions.HSLIncreaseDecrease( 2, dark, 5, false, true ) );
-		defaults.put( "Desktop.background", new ColorUIResource( desktopBackground ) );
-
-		// fix List and Table background colors in Material UI Lite themes
-		if( isMaterialUILite ) {
-			defaults.put( "List.background", defaults.get( "Tree.background" ) );
-			defaults.put( "Table.background", defaults.get( "Tree.background" ) );
-		}
 
 		// limit tree row height
-		int rowHeight = defaults.getInt( "Tree.rowHeight" );
+		String rowHeightStr = (String) properties.get( "Tree.rowHeight" );
+		int rowHeight = (rowHeightStr != null) ? Integer.parseInt( rowHeightStr ) : 0;
 		if( rowHeight > 22 )
-			defaults.put( "Tree.rowHeight", 22 );
+			put( properties, "Tree.rowHeight", "22" );
 
-		// get (and remove) theme specific wildcard replacements, which override all other defaults that end with same suffix
+		// get (and remove) theme specific wildcard replacements, which override all other properties that end with same suffix
-		HashMap<String, Object> wildcards = new HashMap<>();
+		HashMap<String, String> wildcardProps = new HashMap<>();
-		Iterator<Entry<Object, Object>> it = themeSpecificDefaults.entrySet().iterator();
+		Iterator<Map.Entry<String, String>> it = themeSpecificProps.entrySet().iterator();
 		while( it.hasNext() ) {
-			Entry<Object, Object> e = it.next();
+			Map.Entry<String, String> e = it.next();
-			String key = (String) e.getKey();
+			String key = e.getKey();
 			if( key.startsWith( "*." ) ) {
-				wildcards.put( key.substring( "*.".length() ), e.getValue() );
+				wildcardProps.put( key, e.getValue() );
 				it.remove();
 			}
 		}
 
-		// override UI defaults with theme specific wildcard replacements
+		// override properties with theme specific wildcard replacements
-		if( !wildcards.isEmpty() ) {
+		if( !wildcardProps.isEmpty() ) {
-			for( Object key : defaults.keySet().toArray() ) {
+			for( Map.Entry<String, String> e : wildcardProps.entrySet() )
-				int dot;
+				applyWildcard( properties, e.getKey(), e.getValue() );
-				if( !(key instanceof String) ||
-					(dot = ((String)key).lastIndexOf( '.' )) < 0 )
-				  continue;
-
-				String wildcardKey = ((String)key).substring( dot + 1 );
-				Object wildcardValue = wildcards.get( wildcardKey );
-				if( wildcardValue != null )
-					defaults.put( key, wildcardValue );
-			}
 		}
 
-		// apply theme specific UI defaults at the end to allow overwriting
+		// apply theme specific properties at the end to allow overwriting
-		for( Map.Entry<Object, Object> e : themeSpecificDefaults.entrySet() ) {
+		for( Map.Entry<String, String> e : themeSpecificProps.entrySet() ) {
-			Object key = e.getKey();
+			String key = e.getKey();
-			Object value = e.getValue();
+			String value = e.getValue();
 
 			// append styles to existing styles
-			if( key instanceof String && ((String)key).startsWith( "[style]" ) ) {
+			if( key.startsWith( "[style]" ) ) {
-				Object oldValue = defaults.get( key );
+				String oldValue = (String) properties.get( key );
 				if( oldValue != null )
 					value = oldValue + "; " + value;
 			}
 
-			defaults.put( key, value );
+			put( properties, key, value );
 		}
 
 		// let Java release memory
-		colors = null;
+		jsonColors = null;
-		ui = null;
+		jsonUI = null;
-		icons = null;
+		jsonIcons = null;
 	}
 
-	private Object get( UIDefaults defaults, Map<Object, Object> themeSpecificDefaults, String key ) {
+	private String get( Properties properties, Map<String, String> themeSpecificProps, String key ) {
-		return themeSpecificDefaults.getOrDefault( key, defaults.get( key ) );
+		return themeSpecificProps.getOrDefault( key, (String) properties.get( key ) );
 	}
 
-	private void putAll( UIDefaults defaults, Object value, String... keys ) {
+	private void put( Properties properties, Object key, Object value ) {
+		if( value != null )
+			properties.put( key, value );
+		else
+			properties.remove( key );
+	}
+
+	private void putAll( Properties properties, Object value, String... keys ) {
 		for( String key : keys )
-			defaults.put( key, value );
+			put( properties, key, value );
 	}
 
-	private Map<Object, Object> removeThemeSpecificDefaults( UIDefaults defaults ) {
+	private void copyIfSetInJson( Properties properties, Set<String> jsonUIKeys, String destKey, String... srcKeys ) {
-		// search for theme specific UI defaults keys
+		for( String srcKey : srcKeys ) {
+			if( jsonUIKeys.contains( srcKey ) ) {
+				Object value = properties.get( srcKey );
+				if( value != null ) {
+					put( properties, destKey, value );
+					break;
+				}
+			}
+		}
+	}
+
+	private void fixStartEnd( Properties properties, Set<String> jsonUIKeys, String startKey, String endKey, String key ) {
+		if( jsonUIKeys.contains( startKey ) && jsonUIKeys.contains( endKey ) )
+			put( properties, key, "$" + startKey );
+	}
+
+	private Map<String, String> removeThemeSpecificProps( Properties properties ) {
+		// search for theme specific properties keys
 		ArrayList<String> themeSpecificKeys = new ArrayList<>();
-		for( Object key : defaults.keySet() ) {
+		for( Object key : properties.keySet() ) {
-			if( key instanceof String && ((String)key).startsWith( "[" ) && !((String)key).startsWith( "[style]" ) )
+			if( ((String)key).startsWith( "{" ) )
 				themeSpecificKeys.add( (String) key );
 		}
 
-		// remove theme specific UI defaults and remember only those for current theme
+		// special prefixes (priority from highest to lowest)
-		Map<Object, Object> themeSpecificDefaults = new HashMap<>();
+		String currentThemePrefix = '{' + name.replace( ' ', '_' ) + '}';
-		String currentThemePrefix = '[' + name.replace( ' ', '_' ) + ']';
+		String currentThemeAndAuthorPrefix = '{' + name.replace( ' ', '_' ) + "---" + author.replace( ' ', '_' ) + '}';
-		String currentThemeAndAuthorPrefix = '[' + name.replace( ' ', '_' ) + "---" + author.replace( ' ', '_' ) + ']';
+		String currentAuthorPrefix = "{author-" + author.replace( ' ', '_' ) + '}';
-		String currentAuthorPrefix = "[author-" + author.replace( ' ', '_' ) + ']';
+		String lightOrDarkPrefix = dark ? "{*-dark}" : "{*-light}";
-		String allThemesPrefix = "[*]";
+		String allThemesPrefix = "{*}";
-		String[] prefixes = { currentThemePrefix, currentThemeAndAuthorPrefix, currentAuthorPrefix, allThemesPrefix };
+		String[] prefixes = { currentThemePrefix, currentThemeAndAuthorPrefix, currentAuthorPrefix, lightOrDarkPrefix, allThemesPrefix };
+
+		// collect values for special prefixes in its own maps
+		@SuppressWarnings( "unchecked" )
+		Map<String, String>[] maps = new Map[prefixes.length];
+		for( int i = 0; i < maps.length; i++ )
+			maps[i] = new HashMap<>();
+
+		// remove theme specific properties and remember only those for current theme
 		for( String key : themeSpecificKeys ) {
-			Object value = defaults.remove( key );
+			String value = (String) properties.remove( key );
-			for( String prefix : prefixes ) {
+			for( int i = 0; i < prefixes.length; i++ ) {
+				String prefix = prefixes[i];
 				if( key.startsWith( prefix ) ) {
-					themeSpecificDefaults.put( key.substring( prefix.length() ), value );
+					maps[i].put( key.substring( prefix.length() ), value );
 					break;
 				}
 			}
 		}
 
-		return themeSpecificDefaults;
+		// copy values into single map (from lowest to highest priority)
+		Map<String, String> themeSpecificProps = new HashMap<>();
+		for( int i = maps.length - 1; i >= 0; i-- )
+			themeSpecificProps.putAll( maps[i] );
+		return themeSpecificProps;
 	}
 
 	/**
 	 * http://www.jetbrains.org/intellij/sdk/docs/reference_guide/ui_themes/themes_customize.html#defining-named-colors
 	 */
-	private void loadNamedColors( UIDefaults defaults ) {
+	private void loadNamedColors( Properties properties, Set<String> jsonUIKeys ) {
-		if( colors == null )
+		if( jsonColors == null )
 			return;
 
 		namedColors = new HashMap<>();
 
-		for( Map.Entry<String, String> e : colors.entrySet() ) {
+		for( Map.Entry<String, String> e : jsonColors.entrySet() ) {
 			String value = e.getValue();
-			ColorUIResource color = parseColor( value );
+			if( canParseColor( value ) ) {
-			if( color != null ) {
 				String key = e.getKey();
-				namedColors.put( key, color );
+				namedColors.put( key, value );
-				defaults.put( "ColorPalette." + key, color );
+
+				String uiKey = "ColorPalette." + key;
+				put( properties, uiKey, value );
+
+				// this is only necessary for copyIfSetInJson() (used for accent color)
+				jsonUIKeys.add( uiKey );
 			}
 		}
 	}
@@ -380,7 +385,7 @@ public class IntelliJTheme
 	 * http://www.jetbrains.org/intellij/sdk/docs/reference_guide/ui_themes/themes_customize.html#custom-ui-control-colors
 	 */
 	@SuppressWarnings( "unchecked" )
-	private void apply( String key, Object value, UIDefaults defaults, ArrayList<Object> defaultsKeysCache, Set<String> uiKeys ) {
+	private void apply( String key, Object value, Properties properties, Set<String> jsonUIKeys ) {
 		if( value instanceof Map ) {
 			Map<String, Object> map = (Map<String, Object>)value;
 			if( map.containsKey( "os.default" ) || map.containsKey( "os.windows" ) || map.containsKey( "os.mac" ) || map.containsKey( "os.linux" ) ) {
@@ -388,12 +393,12 @@ public class IntelliJTheme
 					: SystemInfo.isMacOS ? "os.mac"
 					: SystemInfo.isLinux ? "os.linux" : null;
 				if( osKey != null && map.containsKey( osKey ) )
-					apply( key, map.get( osKey ), defaults, defaultsKeysCache, uiKeys );
+					apply( key, map.get( osKey ), properties, jsonUIKeys );
 				else if( map.containsKey( "os.default" ) )
-					apply( key, map.get( "os.default" ), defaults, defaultsKeysCache, uiKeys );
+					apply( key, map.get( "os.default" ), properties, jsonUIKeys );
 			} else {
 				for( Map.Entry<String, Object> e : map.entrySet() )
-					apply( key + '.' + e.getKey(), e.getValue(), defaults, defaultsKeysCache, uiKeys );
+					apply( key + '.' + e.getKey(), e.getValue(), properties, jsonUIKeys );
 			}
 		} else {
 			if( "".equals( value ) )
@@ -408,25 +413,40 @@ public class IntelliJTheme
 				key.equals( "Tree.rightChildIndent" ) )
 			  return; // ignore
 
+			// ignore icons
+			if( key.endsWith( "Icon" ) )
+				return; // ignore
+
 			// map keys
 			key = uiKeyMapping.getOrDefault( key, key );
 			if( key.isEmpty() )
 				return; // ignore key
 
-			// exclude properties
+			// exclude properties (1st level)
 			int dot = key.indexOf( '.' );
-			if( dot > 0 && uiKeyExcludes.contains( key.substring( 0, dot + 1 ) ) )
+			if( dot > 0 && uiKeyExcludesStartsWith.contains( key.substring( 0, dot + 1 ) ) )
 				return;
 
-			if( uiKeyDoNotOverride.contains( key ) && uiKeys.contains( key ) )
+			// exclude properties (2st level)
+			int dot2 = (dot > 0) ? key.indexOf( '.', dot + 1 ) : -1;
+			if( dot2 > 0 && uiKeyExcludesStartsWith.contains( key.substring( 0, dot2 + 1 ) ) )
 				return;
 
-			uiKeys.add( key );
+			// exclude properties (contains)
+			for( String s : uiKeyExcludesContains ) {
+				if( key.contains( s ) )
+					return;
+			}
 
-			String valueStr = value.toString();
+			if( uiKeyDoNotOverride.contains( key ) && jsonUIKeys.contains( key ) )
+				return;
+
+			jsonUIKeys.add( key );
+
+			String valueStr = value.toString().trim();
 
 			// map named colors
-			Object uiValue = namedColors.get( valueStr );
+			String uiValue = namedColors.get( valueStr );
 
 			// parse value
 			if( uiValue == null ) {
@@ -445,47 +465,64 @@ public class IntelliJTheme
 
 				// parse value
 				try {
-					uiValue = UIDefaultsLoader.parseValue( key, valueStr, null );
+					UIDefaultsLoader.parseValue( key, valueStr, null );
+					uiValue = valueStr;
 				} catch( RuntimeException ex ) {
-					UIDefaultsLoader.logParseError( key, valueStr, ex, false );
+					UIDefaultsLoader.logParseError( key, valueStr, ex, true );
 					return; // ignore invalid value
 				}
 			}
 
-			if( key.startsWith( "*." ) ) {
+			// wildcards
-				// wildcard
+			if( applyWildcard( properties, key, uiValue ) )
-				String tail = key.substring( 1 );
+				return;
 
-				// because we can not iterate over the UI defaults keys while
+			put( properties, key, uiValue );
-				// modifying UI defaults in the same loop, we have to copy the keys
-				if( defaultsKeysCache.size() != defaults.size() ) {
-					defaultsKeysCache.clear();
-					Enumeration<Object> e = defaults.keys();
-					while( e.hasMoreElements() )
-						defaultsKeysCache.add( e.nextElement() );
-				}
-
-				// replace all values in UI defaults that match the wildcard key
-				for( Object k : defaultsKeysCache ) {
-					if( k.equals( "Desktop.background" ) ||
-						k.equals( "DesktopIcon.background" ) ||
-						k.equals( "TabbedPane.focusColor" ) )
-					  continue;
-
-					if( k instanceof String ) {
-						// support replacing of mapped keys
-						// (e.g. set ComboBox.buttonEditableBackground to *.background
-						// because it is mapped from ComboBox.ArrowButton.background)
-						String km = uiKeyInverseMapping.getOrDefault( k, (String) k );
-						if( km.endsWith( tail ) && !((String)k).startsWith( "CheckBox.icon." ) )
-							defaults.put( k, uiValue );
-					}
-				}
-			} else
-				defaults.put( key, uiValue );
 		}
 	}
 
+	private boolean applyWildcard( Properties properties, String key, String value ) {
+		if( !key.startsWith( "*." ) )
+			return false;
+
+		String tail = key.substring( 1 );
+
+		// because we can not iterate over the properties keys while
+		// modifying properties in the same loop, we have to copy the keys
+		String[] keys = properties.keySet().toArray( new String[properties.size()] );
+
+		// replace all values in properties that match the wildcard key
+		for( String k : keys ) {
+			if( k.startsWith( "*" ) ||
+				k.startsWith( "@" ) ||
+				k.startsWith( "HelpButton." ) ||
+				k.startsWith( "JX" ) ||
+				k.startsWith( "Jide" ) ||
+				k.startsWith( "ProgressBar.selection" ) ||
+				k.startsWith( "TitlePane." ) ||
+				k.startsWith( "ToggleButton.tab." ) ||
+				k.equals( "Desktop.background" ) ||
+				k.equals( "DesktopIcon.background" ) ||
+				k.equals( "TabbedPane.focusColor" ) ||
+				k.endsWith( ".hoverBackground" ) ||
+				k.endsWith( ".pressedBackground" ) )
+			  continue;
+
+			// support replacing of mapped keys
+			// (e.g. set ComboBox.buttonEditableBackground to *.background
+			// because it is mapped from ComboBox.ArrowButton.background)
+			String km = uiKeyInverseMapping.getOrDefault( k, k );
+			if( km.endsWith( tail ) && !k.startsWith( "CheckBox.icon." ) )
+				put( properties, k, value );
+		}
+
+		// Note: also add wildcards to properties and let UIDefaultsLoader
+		//       process it on BasicLookAndFeel UI defaults
+		put( properties, key, value );
+
+		return true;
+	}
+
 	private String fixColorIfValid( String newColorStr, String colorStr ) {
 		try {
 			// check whether it is valid
@@ -497,11 +534,11 @@ public class IntelliJTheme
 		}
 	}
 
-	private void applyColorPalette( UIDefaults defaults ) {
+	private void applyIconsColorPalette( Properties properties ) {
-		if( icons == null )
+		if( jsonIcons == null )
 			return;
 
-		Object palette = icons.get( "ColorPalette" );
+		Object palette = jsonIcons.get( "ColorPalette" );
 		if( !(palette instanceof Map) )
 			return;
 
@@ -510,44 +547,48 @@ public class IntelliJTheme
 		for( Map.Entry<String, Object> e : colorPalette.entrySet() ) {
 			String key = e.getKey();
 			Object value = e.getValue();
-			if( key.startsWith( "Checkbox." ) || !(value instanceof String) )
+			if( key.startsWith( "Checkbox." ) || key.startsWith( "#" ) || !(value instanceof String) )
 				continue;
 
 			if( dark )
 				key = StringUtils.removeTrailing( key, ".Dark" );
 
-			ColorUIResource color = toColor( (String) value );
+			String color = toColor( (String) value );
 			if( color != null )
-				defaults.put( key, color );
+				put( properties, key, color );
 		}
 	}
 
-	private ColorUIResource toColor( String value ) {
+	private String toColor( String value ) {
+		if( value.startsWith( "##" ) )
+			value = fixColorIfValid( value.substring( 1 ), value );
+
 		// map named colors
-		ColorUIResource color = namedColors.get( value );
+		String color = namedColors.get( value );
 
 		// parse color
-		return (color != null) ? color : parseColor( value );
+		return (color != null) ? color : (canParseColor( value ) ? value : null);
 	}
 
-	private ColorUIResource parseColor( String value ) {
+	private boolean canParseColor( String value ) {
 		try {
-			return UIDefaultsLoader.parseColor( value );
+			return UIDefaultsLoader.parseColor( value ) != null;
 		} catch( IllegalArgumentException ex ) {
-			return null;
+			LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to parse color: '" + value + '\'', ex );
+			return false;
 		}
 	}
 
 	/**
 	 * Because IDEA uses SVGs for check boxes and radio buttons, the colors for
 	 * these two components are specified in "icons > ColorPalette".
-	 * FlatLaf uses vector icons and expects colors for the two components in UI defaults.
+	 * FlatLaf uses vector icons and expects colors for the two components in properties.
 	 */
-	private void applyCheckBoxColors( UIDefaults defaults ) {
+	private void applyCheckBoxColors( Properties properties ) {
-		if( icons == null )
+		if( jsonIcons == null )
 			return;
 
-		Object palette = icons.get( "ColorPalette" );
+		Object palette = jsonIcons.get( "ColorPalette" );
 		if( !(palette instanceof Map) )
 			return;
 
@@ -569,9 +610,9 @@ public class IntelliJTheme
 				if( !dark && newKey.startsWith( checkBoxIconPrefix ) )
 					newKey = "CheckBox.icon[filled].".concat( newKey.substring( checkBoxIconPrefix.length() ) );
 
-				ColorUIResource color = toColor( (String) value );
+				String color = toColor( (String) value );
 				if( color != null ) {
-					defaults.put( newKey, color );
+					put( properties, newKey, color );
 
 					String key2 = checkboxDuplicateColors.get( key + ".Dark");
 					if( key2 != null ) {
@@ -592,7 +633,7 @@ public class IntelliJTheme
 
 						String newKey2 = checkboxKeyMapping.get( key2 );
 						if( newKey2 != null )
-							defaults.put( newKey2, color );
+							put( properties, newKey2, color );
 					}
 				}
 
@@ -603,13 +644,13 @@ public class IntelliJTheme
 		// update hover, pressed and focused colors
 		if( checkboxModified ) {
 			// for non-filled checkbox/radiobutton used in dark themes
-			defaults.remove( "CheckBox.icon.focusWidth" );
+			properties.remove( "CheckBox.icon.focusWidth" );
-			defaults.put( "CheckBox.icon.hoverBorderColor", defaults.get( "CheckBox.icon.focusedBorderColor" ) );
+			put( properties, "CheckBox.icon.hoverBorderColor", properties.get( "CheckBox.icon.focusedBorderColor" ) );
 
 			// for filled checkbox/radiobutton used in light themes
-			defaults.remove( "CheckBox.icon[filled].focusWidth" );
+			properties.remove( "CheckBox.icon[filled].focusWidth" );
-			defaults.put( "CheckBox.icon[filled].hoverBorderColor", defaults.get( "CheckBox.icon[filled].focusedBorderColor" ) );
+			put( properties, "CheckBox.icon[filled].hoverBorderColor", properties.get( "CheckBox.icon[filled].focusedBorderColor" ) );
-			defaults.put( "CheckBox.icon[filled].focusedSelectedBackground", defaults.get( "CheckBox.icon[filled].selectedBackground" ) );
+			put( properties, "CheckBox.icon[filled].focusedSelectedBackground", properties.get( "CheckBox.icon[filled].selectedBackground" ) );
 
 			if( dark ) {
 				// IDEA Darcula checkBoxFocused.svg, checkBoxSelectedFocused.svg,
@@ -623,22 +664,16 @@ public class IntelliJTheme
 					"CheckBox.icon[filled].focusedSelectedBorderColor",
 				};
 				for( String key : focusedBorderColorKeys ) {
-					Color color = defaults.getColor( key );
+					Object color = properties.get( key );
-					if( color != null ) {
+					if( color != null )
-						defaults.put( key, new ColorUIResource( new Color(
+						put( properties, key, "fade(" + color + ", 65%)" );
-							(color.getRGB() & 0xffffff) | 0xa6000000, true ) ) );
-					}
 				}
 			}
 		}
 	}
 
-	private void copyIfNotSet( UIDefaults defaults, String destKey, String srcKey, Set<String> uiKeys ) {
+	private static final Set<String> uiKeyExcludesStartsWith;
-		if( !uiKeys.contains( destKey ) )
+	private static final String[] uiKeyExcludesContains;
-			defaults.put( destKey, defaults.get( srcKey ) );
-	}
-
-	private static final Set<String> uiKeyExcludes;
 	private static final Set<String> uiKeyDoNotOverride;
 	/** Rename UI default keys (key --> value). */
 	private static final Map<String, String> uiKeyMapping = new HashMap<>();
@@ -650,29 +685,30 @@ public class IntelliJTheme
 
 	static {
 		// IntelliJ UI properties that are not used in FlatLaf
-		uiKeyExcludes = new HashSet<>( Arrays.asList(
+		uiKeyExcludesStartsWith = new HashSet<>( Arrays.asList(
 			"ActionButton.", "ActionToolbar.", "ActionsList.", "AppInspector.", "AssignedMnemonic.", "Autocomplete.",
 			"AvailableMnemonic.",
-			"BigSpinner.", "Bookmark.", "BookmarkIcon.", "BookmarkMnemonicAssigned.", "BookmarkMnemonicAvailable.",
+			"Badge.", "Banner.", "BigSpinner.", "Bookmark.", "BookmarkIcon.", "BookmarkMnemonicAssigned.", "BookmarkMnemonicAvailable.",
 			"BookmarkMnemonicCurrent.", "BookmarkMnemonicIcon.", "Borders.", "Breakpoint.",
-			"Canvas.", "CodeWithMe.", "ComboBoxButton.", "CompletionPopup.", "ComplexPopup.", "Content.",
+			"Canvas.", "CellEditor.", "Code.", "CodeWithMe.", "ColumnControlButton.", "CombinedDiff.", "ComboBoxButton.",
-			"CurrentMnemonic.", "Counter.",
+			"CompilationCharts.", "CompletionPopup.", "ComplexPopup.", "Content.", "ContextHelp.", "CurrentMnemonic.", "Counter.",
-			"Debugger.", "DebuggerPopup.", "DebuggerTabs.", "DefaultTabs.", "Dialog.", "DialogWrapper.", "DragAndDrop.",
+			"Debugger.", "DebuggerPopup.", "DebuggerTabs.", "DefaultTabs.", "Dialog.", "DialogWrapper.",
+			"DisclosureButton.", "DragAndDrop.",
 			"Editor.", "EditorGroupsTabs.", "EditorTabs.",
-			"FileColor.", "FlameGraph.", "Focus.",
+			"FileColor.", "FindPopup.", "FlameGraph.", "Focus.",
 			"Git.", "Github.", "GotItTooltip.", "Group.", "Gutter.", "GutterTooltip.",
 			"HeaderColor.", "HelpTooltip.", "Hg.",
-			"IconBadge.", "InformationHint.", "InplaceRefactoringPopup.",
+			"IconBadge.", "InformationHint.", "InlineBanner.", "InplaceRefactoringPopup.",
-			"Lesson.", "Link.", "LiveIndicator.",
+			"Lesson.", "LineProfiler.", "Link.", "LiveIndicator.",
-			"MainMenu.", "MainToolbar.", "MemoryIndicator.", "MlModelBinding.", "MnemonicIcon.",
+			"MainMenu.", "MainToolbar.", "MainWindow.", "MemoryIndicator.", "MlModelBinding.", "MnemonicIcon.",
 			"NavBar.", "NewClass.", "NewPSD.", "Notification.", "Notifications.", "NotificationsToolwindow.",
 			"OnePixelDivider.", "OptionButton.", "Outline.",
-			"ParameterInfo.", "Plugins.", "ProgressIcon.", "PsiViewer.",
+			"ParameterInfo.", "PresentationAssistant.", "Plugins.", "Profiler.", "ProgressIcon.", "PsiViewer.",
-			"ReviewList.", "RunWidget.",
+			"Resizable.", "Review.", "ReviewList.", "RunToolbar.", "RunWidget.",
 			"ScreenView.", "SearchEverywhere.", "SearchFieldWithExtension.", "SearchMatch.", "SearchOption.",
 			"SearchResults.", "SegmentedButton.", "Settings.", "SidePanel.", "Space.", "SpeedSearch.", "StateWidget.",
-			"StatusBar.",
+			"StatusBar.", "StripeToolbar.",
-			"Tag.", "TipOfTheDay.", "ToolbarComboWidget.", "ToolWindow.",
+			"Tag.", "TipOfTheDay.", "ToolbarComboWidget.", "ToolWindow.", "TrialWidget.",
 			"UIDesigner.", "UnattendedHostStatus.",
 			"ValidationTooltip.", "VersionControl.",
 			"WelcomeScreen.",
@@ -683,11 +719,24 @@ public class IntelliJTheme
 			// possible typos in .theme.json files
 			"Checkbox.", "Toolbar.", "Tooltip.", "UiDesigner.", "link."
 		) );
+		uiKeyExcludesContains = new String[] {
+			".darcula."
+		};
 
 		uiKeyDoNotOverride = new HashSet<>( Arrays.asList(
 			"TabbedPane.selectedForeground"
 		) );
 
+		// "*."
+		uiKeyMapping.put( "*.fontFace", "" ); // ignore (used in OnePauintxi themes)
+		uiKeyMapping.put( "*.fontSize", "" ); // ignore (used in OnePauintxi themes)
+
+		// Button
+		uiKeyMapping.put( "Button.minimumSize", "" ); // ignore (used in Material Theme UI Lite)
+
+		// CheckBox.iconSize
+		uiKeyMapping.put( "CheckBox.iconSize", "" ); // ignore (used in Rider themes)
+
 		// ComboBox
 		uiKeyMapping.put( "ComboBox.background",                        "" ); // ignore
 		uiKeyMapping.put( "ComboBox.buttonBackground",                  "" ); // ignore
@@ -696,14 +745,17 @@ public class IntelliJTheme
 		uiKeyMapping.put( "ComboBox.ArrowButton.disabledIconColor",     "ComboBox.buttonDisabledArrowColor" );
 		uiKeyMapping.put( "ComboBox.ArrowButton.iconColor",             "ComboBox.buttonArrowColor" );
 		uiKeyMapping.put( "ComboBox.ArrowButton.nonEditableBackground", "ComboBox.buttonBackground" );
-		uiKeyCopying.put( "ComboBox.buttonSeparatorColor",              "Component.borderColor" );
-		uiKeyCopying.put( "ComboBox.buttonDisabledSeparatorColor",      "Component.disabledBorderColor" );
 
 		// Component
 		uiKeyMapping.put( "Component.inactiveErrorFocusColor",   "Component.error.borderColor" );
 		uiKeyMapping.put( "Component.errorFocusColor",           "Component.error.focusedBorderColor" );
 		uiKeyMapping.put( "Component.inactiveWarningFocusColor", "Component.warning.borderColor" );
 		uiKeyMapping.put( "Component.warningFocusColor",         "Component.warning.focusedBorderColor" );
+		uiKeyMapping.put( "Component.inactiveSuccessFocusColor", "Component.success.borderColor" );
+		uiKeyMapping.put( "Component.successFocusColor",         "Component.success.focusedBorderColor" );
+
+		// Label
+		uiKeyMapping.put( "Label.disabledForegroundColor", "" ); // ignore (used in Material Theme UI Lite)
 
 		// Link
 		uiKeyMapping.put( "Link.activeForeground", "Component.linkColor" );
@@ -711,10 +763,7 @@ public class IntelliJTheme
 		// Menu
 		uiKeyMapping.put( "Menu.border",                "Menu.margin" );
 		uiKeyMapping.put( "MenuItem.border",            "MenuItem.margin" );
-		uiKeyCopying.put( "CheckBoxMenuItem.margin",    "MenuItem.margin" );
-		uiKeyCopying.put( "RadioButtonMenuItem.margin", "MenuItem.margin" );
 		uiKeyMapping.put( "PopupMenu.border",           "PopupMenu.borderInsets" );
-		uiKeyCopying.put( "MenuItem.underlineSelectionColor", "TabbedPane.underlineColor" );
 
 		// IDEA uses List.selectionBackground also for menu selection
 		uiKeyCopying.put( "Menu.selectionBackground",                "List.selectionBackground" );
@@ -722,13 +771,14 @@ public class IntelliJTheme
 		uiKeyCopying.put( "CheckBoxMenuItem.selectionBackground",    "List.selectionBackground" );
 		uiKeyCopying.put( "RadioButtonMenuItem.selectionBackground", "List.selectionBackground" );
 
-		// ProgressBar
+		// ProgressBar: IDEA uses ProgressBar.trackColor and ProgressBar.progressColor
 		uiKeyMapping.put( "ProgressBar.background",    "" ); // ignore
 		uiKeyMapping.put( "ProgressBar.foreground",    "" ); // ignore
 		uiKeyMapping.put( "ProgressBar.trackColor",    "ProgressBar.background" );
 		uiKeyMapping.put( "ProgressBar.progressColor", "ProgressBar.foreground" );
-		uiKeyCopying.put( "ProgressBar.selectionForeground", "ProgressBar.background" );
+
-		uiKeyCopying.put( "ProgressBar.selectionBackground", "ProgressBar.foreground" );
+		// RadioButton
+		uiKeyMapping.put( "RadioButton.iconSize", "" ); // ignore (used in Rider themes)
 
 		// ScrollBar
 		uiKeyMapping.put( "ScrollBar.trackColor", "ScrollBar.track" );
@@ -738,34 +788,30 @@ public class IntelliJTheme
 		uiKeyMapping.put( "Separator.separatorColor", "Separator.foreground" );
 
 		// Slider
+		uiKeyMapping.put( "Slider.buttonColor", "Slider.thumbColor" );
+		uiKeyMapping.put( "Slider.buttonBorderColor", "" ); // ignore
+		uiKeyMapping.put( "Slider.thumb", "" ); // ignore (used in Material Theme UI Lite)
+		uiKeyMapping.put( "Slider.track", "" ); // ignore (used in Material Theme UI Lite)
+		uiKeyMapping.put( "Slider.trackDisabled", "" ); // ignore (used in Material Theme UI Lite)
 		uiKeyMapping.put( "Slider.trackWidth", "" ); // ignore (used in Material Theme UI Lite)
-		uiKeyCopying.put( "Slider.trackValueColor", "ProgressBar.foreground" );
-		uiKeyCopying.put( "Slider.thumbColor", "ProgressBar.foreground" );
-		uiKeyCopying.put( "Slider.trackColor", "ProgressBar.background" );
-
-		// Spinner
-		uiKeyCopying.put( "Spinner.buttonSeparatorColor",         "Component.borderColor" );
-		uiKeyCopying.put( "Spinner.buttonDisabledSeparatorColor", "Component.disabledBorderColor" );
 
 		// TabbedPane
 		uiKeyMapping.put( "DefaultTabs.underlinedTabBackground", "TabbedPane.selectedBackground" );
 		uiKeyMapping.put( "DefaultTabs.underlinedTabForeground", "TabbedPane.selectedForeground" );
 		uiKeyMapping.put( "DefaultTabs.inactiveUnderlineColor",  "TabbedPane.inactiveUnderlineColor" );
+		uiKeyMapping.put( "TabbedPane.tabAreaInsets", "" ); // ignore (used in Material Theme UI Lite)
+
+		// TableHeader
+		uiKeyMapping.put( "TableHeader.cellBorder", "" ); // ignore (used in Material Theme UI Lite)
+		uiKeyMapping.put( "TableHeader.height", "" ); // ignore (used in Material Theme UI Lite)
 
 		// TitlePane
-		uiKeyCopying.put( "TitlePane.inactiveBackground",     "TitlePane.background" );
 		uiKeyMapping.put( "TitlePane.infoForeground",         "TitlePane.foreground" );
 		uiKeyMapping.put( "TitlePane.inactiveInfoForeground", "TitlePane.inactiveForeground" );
 
 		for( Map.Entry<String, String> e : uiKeyMapping.entrySet() )
 			uiKeyInverseMapping.put( e.getValue(), e.getKey() );
 
-		uiKeyCopying.put( "ToggleButton.tab.underlineColor",         "TabbedPane.underlineColor" );
-		uiKeyCopying.put( "ToggleButton.tab.disabledUnderlineColor", "TabbedPane.disabledUnderlineColor" );
-		uiKeyCopying.put( "ToggleButton.tab.selectedBackground",     "TabbedPane.selectedBackground" );
-		uiKeyCopying.put( "ToggleButton.tab.hoverBackground",        "TabbedPane.hoverColor" );
-		uiKeyCopying.put( "ToggleButton.tab.focusBackground",        "TabbedPane.focusColor" );
-
 		checkboxKeyMapping.put( "Checkbox.Background.Default",  "CheckBox.icon.background" );
 		checkboxKeyMapping.put( "Checkbox.Background.Disabled", "CheckBox.icon.disabledBackground" );
 		checkboxKeyMapping.put( "Checkbox.Border.Default",      "CheckBox.icon.borderColor" );
@@ -818,17 +864,15 @@ public class IntelliJTheme
 		}
 
 		@Override
-		void applyAdditionalDefaults( UIDefaults defaults ) {
+		void applyAdditionalProperties( Properties properties ) {
-			theme.applyProperties( defaults );
+			theme.applyProperties( properties );
 		}
 
 		@Override
 		protected ArrayList<Class<?>> getLafClassesForDefaultsLoading() {
-			ArrayList<Class<?>> lafClasses = new ArrayList<>();
+			ArrayList<Class<?>> lafClasses = UIDefaultsLoader.getLafClassesForDefaultsLoading( getClass() );
-			lafClasses.add( FlatLaf.class );
+			lafClasses.add( 1, theme.dark ? FlatDarkLaf.class : FlatLightLaf.class );
-			lafClasses.add( theme.dark ? FlatDarkLaf.class : FlatLightLaf.class );
+			lafClasses.add( 2, theme.dark ? FlatDarculaLaf.class : FlatIntelliJLaf.class );
-			lafClasses.add( theme.dark ? FlatDarculaLaf.class : FlatIntelliJLaf.class );
-			lafClasses.add( ThemeLaf.class );
 			return lafClasses;
 		}
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/LinuxFontPolicy.java

@@ -111,7 +111,7 @@ class LinuxFontPolicy
 		if( logicalFamily != null )
 			family = logicalFamily;
 
-		return createFontEx( family, style, size, dsize );
+		return createFontEx( family, style, size );
 	}
 
 	/**
@@ -121,9 +121,9 @@ class LinuxFontPolicy
 	 * E.g. family 'URW Bookman Light' is not found, but 'URW Bookman' is found.
 	 * If still not found, then font of family 'Dialog' is returned.
 	 */
-	private static Font createFontEx( String family, int style, int size, double dsize ) {
+	private static Font createFontEx( String family, int style, int size ) {
 		for(;;) {
-			Font font = createFont( family, style, size, dsize );
+			Font font = FlatLaf.createCompositeFont( family, style, size );
 
 			if( Font.DIALOG.equals( family ) )
 				return font;
@@ -135,7 +135,7 @@ class LinuxFontPolicy
 				// - character width is zero (e.g. font Cantarell; Fedora; Oracle Java 8)
 				FontMetrics fm = StyleContext.getDefaultStyleContext().getFontMetrics( font );
 				if( fm.getHeight() > size * 2 || fm.stringWidth( "a" ) == 0 )
-					return createFont( Font.DIALOG, style, size, dsize );
+					return FlatLaf.createCompositeFont( Font.DIALOG, style, size );
 
 				return font;
 			}
@@ -143,7 +143,7 @@ class LinuxFontPolicy
 			// find last word in family
 			int index = family.lastIndexOf( ' ' );
 			if( index < 0 )
-				return createFont( Font.DIALOG, style, size, dsize );
+				return FlatLaf.createCompositeFont( Font.DIALOG, style, size );
 
 			// check whether last work contains some font weight (e.g. Ultra-Bold or Heavy)
 			String lastWord = family.substring( index + 1 ).toLowerCase( Locale.ENGLISH );
@@ -155,15 +155,6 @@ class LinuxFontPolicy
 		}
 	}
 
-	private static Font createFont( String family, int style, int size, double dsize ) {
-		Font font = FlatLaf.createCompositeFont( family, style, size );
-
-		// set font size in floating points
-		font = font.deriveFont( style, (float) dsize );
-
-		return font;
-	}
-
 	private static double getGnomeFontScale() {
 		// do not scale font here if JRE scales
 		if( isSystemScaling() )
@@ -257,7 +248,7 @@ class LinuxFontPolicy
 		if( size < 1 )
 			size = 1;
 
-		return createFont( family, style, size, dsize );
+		return FlatLaf.createCompositeFont( family, style, size );
 	}
 
 	@SuppressWarnings( "MixedMutabilityReturnType" ) // Error Prone

flatlaf-core/src/main/java/com/formdev/flatlaf/LinuxPopupMenuCanceler.java

@@ -0,0 +1,166 @@
+/*
+ * Copyright 2025 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf;
+
+import java.awt.Component;
+import java.awt.Window;
+import java.awt.event.ComponentEvent;
+import java.awt.event.ComponentListener;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import javax.swing.JPopupMenu;
+import javax.swing.MenuElement;
+import javax.swing.MenuSelectionManager;
+import javax.swing.SwingUtilities;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+
+/**
+ * Cancels (hides) popup menus on Linux.
+ * <p>
+ * On Linux, popups are not hidden under following conditions, which results in
+ * misplaced popups:
+ * <ul>
+ *   <li>window moved or resized
+ *   <li>window maximized or restored
+ *   <li>window iconified
+ *   <li>window deactivated (e.g. activated other application)
+ * </ul>
+ *
+ * On Windows and macOS, popups are automatically hidden.
+ * <p>
+ * The implementation is similar to what's done in
+ * {@code javax.swing.plaf.basic.BasicPopupMenuUI.MouseGrabber},
+ * but only hides popup in some conditions.
+ *
+ * @author Karl Tauber
+ */
+class LinuxPopupMenuCanceler
+	extends WindowAdapter
+	implements ChangeListener, ComponentListener
+{
+	private MenuElement[] lastPathSelectedPath;
+	private Window window;
+
+	LinuxPopupMenuCanceler() {
+		MenuSelectionManager msm = MenuSelectionManager.defaultManager();
+		msm.addChangeListener( this );
+
+		lastPathSelectedPath = msm.getSelectedPath();
+		if( lastPathSelectedPath.length > 0 )
+			addWindowListeners( lastPathSelectedPath[0] );
+	}
+
+	void uninstall() {
+		MenuSelectionManager.defaultManager().removeChangeListener( this );
+	}
+
+	private void addWindowListeners( MenuElement selected ) {
+		removeWindowListeners();
+
+		// see BasicPopupMenuUI.MouseGrabber.grabWindow()
+		Component invoker = selected.getComponent();
+		if( invoker instanceof JPopupMenu )
+			invoker = ((JPopupMenu)invoker).getInvoker();
+		window = (invoker instanceof Window)
+			? (Window) invoker
+			: SwingUtilities.windowForComponent( invoker );
+
+		if( window != null ) {
+			window.addWindowListener( this );
+			window.addComponentListener( this );
+		}
+	}
+
+	private void removeWindowListeners() {
+		if( window != null ) {
+			window.removeWindowListener( this );
+			window.removeComponentListener( this );
+			window = null;
+		}
+	}
+
+	private void cancelPopupMenu() {
+		try {
+			MenuSelectionManager msm = MenuSelectionManager.defaultManager();
+			MenuElement[] selectedPath = msm.getSelectedPath();
+			for( MenuElement e : selectedPath ) {
+				if( e instanceof JPopupMenu )
+					((JPopupMenu)e).putClientProperty( "JPopupMenu.firePopupMenuCanceled", true );
+			}
+			msm.clearSelectedPath();
+		} catch( RuntimeException ex ) {
+			removeWindowListeners();
+			throw ex;
+		} catch( Error ex ) {
+			removeWindowListeners();
+			throw ex;
+		}
+	}
+
+	//---- ChangeListener ----
+
+	@Override
+	public void stateChanged( ChangeEvent e ) {
+		MenuElement[] selectedPath = MenuSelectionManager.defaultManager().getSelectedPath();
+
+		if( selectedPath.length == 0 )
+			removeWindowListeners();
+		else if( lastPathSelectedPath.length == 0 )
+			addWindowListeners( selectedPath[0] );
+
+		lastPathSelectedPath = selectedPath;
+	}
+
+	//---- WindowListener ----
+
+	@Override
+	public void windowIconified( WindowEvent e ) {
+		cancelPopupMenu();
+	}
+
+	@Override
+	public void windowDeactivated( WindowEvent e ) {
+		cancelPopupMenu();
+	}
+
+	@Override
+	public void windowClosing( WindowEvent e ) {
+		cancelPopupMenu();
+	}
+
+	//---- ComponentListener ----
+
+	@Override
+	public void componentResized( ComponentEvent e ) {
+		cancelPopupMenu();
+	}
+
+	@Override
+	public void componentMoved( ComponentEvent e ) {
+		cancelPopupMenu();
+	}
+
+	@Override
+	public void componentShown( ComponentEvent e ) {
+	}
+
+	@Override
+	public void componentHidden( ComponentEvent e ) {
+		cancelPopupMenu();
+	}
+}

flatlaf-core/src/main/java/com/formdev/flatlaf/SubMenuUsabilityHelper.java

@@ -45,6 +45,7 @@ import javax.swing.UIManager;
 import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
 import com.formdev.flatlaf.ui.FlatUIUtils;
+import com.formdev.flatlaf.util.LoggingFacade;
 
 /**
  * Improves usability of submenus by using a
@@ -64,6 +65,7 @@ class SubMenuUsabilityHelper
 	// https://github.com/apache/netbeans/issues/4231#issuecomment-1179616607
 	private static SubMenuUsabilityHelper instance;
 
+	private boolean eventQueuePushNotSupported;
 	private SubMenuEventQueue subMenuEventQueue;
 	private SafeTrianglePainter safeTrianglePainter;
 	private boolean changePending;
@@ -83,6 +85,9 @@ class SubMenuUsabilityHelper
 		if( instance != null )
 			return false;
 
+		if( !FlatSystemProperties.getBoolean( FlatSystemProperties.USE_SUB_MENU_SAFE_TRIANGLE, true ) )
+			return false;
+
 		instance = new SubMenuUsabilityHelper();
 		MenuSelectionManager.defaultManager().addChangeListener( instance );
 		return true;
@@ -99,7 +104,7 @@ class SubMenuUsabilityHelper
 
 	@Override
 	public void stateChanged( ChangeEvent e ) {
-		if( !FlatUIUtils.getUIBoolean( KEY_USE_SAFE_TRIANGLE, true ))
+		if( eventQueuePushNotSupported || !FlatUIUtils.getUIBoolean( KEY_USE_SAFE_TRIANGLE, true ))
 			return;
 
 		// handle menu selection change later, but only once in case of temporary changes
@@ -173,8 +178,29 @@ debug*/
 		targetBottomY = popupLocation.y + popupSize.height;
 
 		// install own event queue to suppress mouse events when mouse is moved within safe triangle
-		if( subMenuEventQueue == null )
+		if( subMenuEventQueue == null ) {
-			subMenuEventQueue = new SubMenuEventQueue();
+			SubMenuEventQueue queue = new SubMenuEventQueue();
+
+			try {
+				Toolkit toolkit = Toolkit.getDefaultToolkit();
+				toolkit.getSystemEventQueue().push( queue );
+
+				// check whether push() worked
+				// (e.g. SWTSwing uses own event queue that does not support push())
+				if( toolkit.getSystemEventQueue() != queue ) {
+					eventQueuePushNotSupported = true;
+					LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to push submenu event queue. Disabling submenu safe triangle.", null );
+					return;
+				}
+
+				subMenuEventQueue = queue;
+			} catch( RuntimeException ex ) {
+				// catch runtime exception from EventQueue.push()
+				eventQueuePushNotSupported = true;
+				LoggingFacade.INSTANCE.logSevere( "FlatLaf: Failed to push submenu event queue. Disabling submenu safe triangle.", ex );
+				return;
+			}
+		}
 
 		// create safe triangle painter
 		if( safeTrianglePainter == null && UIManager.getBoolean( KEY_SHOW_SAFE_TRIANGLE ) )
@@ -247,8 +273,6 @@ debug*/
 				}
 			} );
 			timeoutTimer.setRepeats( false );
-
-			Toolkit.getDefaultToolkit().getSystemEventQueue().push( this );
 		}
 
 		void uninstall() {

flatlaf-core/src/main/java/com/formdev/flatlaf/UIDefaultsLoader.java

@@ -41,6 +41,8 @@ import java.util.Locale;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Properties;
+import java.util.Set;
+import java.util.function.Consumer;
 import java.util.function.Function;
 import javax.swing.Icon;
 import javax.swing.UIDefaults;
@@ -61,7 +63,6 @@ import com.formdev.flatlaf.util.HSLColor;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.SoftCache;
 import com.formdev.flatlaf.util.StringUtils;
-import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -85,15 +86,14 @@ class UIDefaultsLoader
 	private static final String WILDCARD_PREFIX = "*.";
 
 	static final String KEY_VARIABLES = "FlatLaf.internal.variables";
+	static final String KEY_PROPERTIES = "FlatLaf.internal.properties";
 
 	private static int parseColorDepth;
 
 	private static Map<String, ColorUIResource> systemColorCache;
 	private static final SoftCache<String, Object> fontCache = new SoftCache<>();
 
-	static void loadDefaultsFromProperties( Class<?> lookAndFeelClass, List<FlatDefaultsAddon> addons,
+	static ArrayList<Class<?>> getLafClassesForDefaultsLoading( Class<?> lookAndFeelClass ) {
-		Properties additionalDefaults, boolean dark, UIDefaults defaults )
-	{
 		// determine classes in class hierarchy in reverse order
 		ArrayList<Class<?>> lafClasses = new ArrayList<>();
 		for( Class<?> lafClass = lookAndFeelClass;
@@ -102,20 +102,54 @@ class UIDefaultsLoader
 		{
 			lafClasses.add( 0, lafClass );
 		}
+		return lafClasses;
+	}
 
-		loadDefaultsFromProperties( lafClasses, addons, additionalDefaults, dark, defaults );
+	static Properties newUIProperties( boolean dark ) {
+		// UI key prefixes
+		String lightOrDarkPrefix = FlatLaf.getUIKeyLightOrDarkPrefix( dark );
+		Set<String> platformPrefixes = FlatLaf.getUIKeyPlatformPrefixes();
+		Set<String> specialPrefixes = FlatLaf.getUIKeySpecialPrefixes();
+
+		return new Properties() {
+			@Override
+			public synchronized Object put( Object k, Object value ) {
+				// process key prefixes (while loading properties files)
+				String key = (String) k;
+				while( key.startsWith( "[" ) ) {
+					int closeIndex = key.indexOf( ']' );
+					if( closeIndex < 0 )
+						return null; // ignore property with invalid prefix
+
+					String prefix = key.substring( 0, closeIndex + 1 );
+
+					if( specialPrefixes.contains( prefix ) )
+						break; // keep special prefix
+
+					if( !lightOrDarkPrefix.equals( prefix ) && !platformPrefixes.contains( prefix ) )
+						return null; // ignore property
+
+					// prefix is known and enabled --> remove prefix
+					key = key.substring( closeIndex + 1 );
+				}
+
+				return super.put( key, value );
+			}
+		};
 	}
 
 	static void loadDefaultsFromProperties( List<Class<?>> lafClasses, List<FlatDefaultsAddon> addons,
-		Properties additionalDefaults, boolean dark, UIDefaults defaults )
+		Consumer<Properties> intellijThemesHook, Properties additionalDefaults, boolean dark, UIDefaults defaults )
 	{
 		try {
 			// temporary cache system colors while loading defaults,
 			// which avoids that system color getter is invoked multiple times
 			systemColorCache = (FlatLaf.getSystemColorGetter() != null) ? new HashMap<>() : null;
 
+			// all properties files will be loaded into this map
+			Properties properties = newUIProperties( dark );
+
 			// load core properties files
-			Properties properties = new Properties();
 			for( Class<?> lafClass : lafClasses ) {
 				String propertiesName = '/' + lafClass.getName().replace( '.', '/' ) + ".properties";
 				try( InputStream in = lafClass.getResourceAsStream( propertiesName ) ) {
@@ -142,6 +176,10 @@ class UIDefaultsLoader
 					addonClassLoaders.add( addonClassLoader );
 			}
 
+			// apply IntelliJ themes properties
+			if( intellijThemesHook != null )
+				intellijThemesHook.accept( properties );
+
 			// load custom properties files (usually provided by applications)
 			List<Object> customDefaultsSources = FlatLaf.getCustomDefaultsSources();
 			int size = (customDefaultsSources != null) ? customDefaultsSources.size() : 0;
@@ -198,41 +236,6 @@ class UIDefaultsLoader
 			if( additionalDefaults != null )
 				properties.putAll( additionalDefaults );
 
-			// collect all platform specific keys (but do not modify properties)
-			ArrayList<String> platformSpecificKeys = new ArrayList<>();
-			for( Object okey : properties.keySet() ) {
-				String key = (String) okey;
-				if( key.startsWith( "[" ) &&
-					(key.startsWith( "[win]" ) ||
-					 key.startsWith( "[mac]" ) ||
-					 key.startsWith( "[linux]" ) ||
-					 key.startsWith( "[light]" ) ||
-					 key.startsWith( "[dark]" )) )
-				  platformSpecificKeys.add( key );
-			}
-
-			// remove platform specific properties and re-add only properties
-			// for current platform, but with platform prefix removed
-			if( !platformSpecificKeys.isEmpty() ) {
-				// handle light/dark specific properties
-				String lightOrDarkPrefix = dark ? "[dark]" : "[light]";
-				for( String key : platformSpecificKeys ) {
-					if( key.startsWith( lightOrDarkPrefix ) )
-						properties.put( key.substring( lightOrDarkPrefix.length() ), properties.remove( key ) );
-				}
-
-				// handle platform specific properties
-				String platformPrefix =
-					SystemInfo.isWindows ? "[win]" :
-					SystemInfo.isMacOS ? "[mac]" :
-					SystemInfo.isLinux ? "[linux]" : "[unknown]";
-				for( String key : platformSpecificKeys ) {
-					Object value = properties.remove( key );
-					if( key.startsWith( platformPrefix ) )
-						properties.put( key.substring( platformPrefix.length() ), value );
-				}
-			}
-
 			// get (and remove) wildcard replacements, which override all other defaults that end with same suffix
 			HashMap<String, String> wildcards = new HashMap<>();
 			Iterator<Entry<Object, Object>> it = properties.entrySet().iterator();
@@ -287,6 +290,15 @@ class UIDefaultsLoader
 			// remember variables in defaults to allow using them in styles
 			defaults.put( KEY_VARIABLES, variables );
 
+			// remember properties (for testing)
+			if( FlatSystemProperties.getBoolean( KEY_PROPERTIES, false ) ) {
+				Properties properties2 = new Properties();
+				properties2.putAll( properties );
+				for( Map.Entry<String, String> e : wildcards.entrySet() )
+					properties2.put( WILDCARD_PREFIX + e.getKey(), e.getValue() );
+				defaults.put( KEY_PROPERTIES, properties2 );
+			}
+
 			// clear/disable system color cache
 			systemColorCache = null;
 		} catch( IOException ex ) {
@@ -637,18 +649,26 @@ class UIDefaultsLoader
 		if( value.indexOf( ',' ) >= 0 ) {
 			// Syntax: top,left,bottom,right[,lineColor[,lineThickness[,arc]]]
 			List<String> parts = splitFunctionParams( value, ',' );
-			Insets insets = parseInsets( value );
+			try {
-			ColorUIResource lineColor = (parts.size() >= 5)
+				Insets insets = parseInsets( value );
-				? (ColorUIResource) parseColorOrFunction( resolver.apply( parts.get( 4 ) ), resolver )
+				ColorUIResource lineColor = (parts.size() >= 5 && !parts.get( 4 ).isEmpty())
-				: null;
+					? (ColorUIResource) parseColorOrFunction( resolver.apply( parts.get( 4 ) ), resolver )
-			float lineThickness = (parts.size() >= 6 && !parts.get( 5 ).isEmpty()) ? parseFloat( parts.get( 5 ) ) : 1f;
+					: null;
-			int arc = (parts.size() >= 7) ? parseInteger( parts.get( 6 ) ) : 0;
+				float lineThickness = (parts.size() >= 6 && !parts.get( 5 ).isEmpty())
+					? parseFloat( parts.get( 5 ) )
+					: 1f;
+				int arc = (parts.size() >= 7) && !parts.get( 6 ).isEmpty()
+					? parseInteger( parts.get( 6 ) )
+					: -1;
 
-			return (LazyValue) t -> {
+				return (LazyValue) t -> {
-				return (lineColor != null)
+					return (lineColor != null || arc > 0)
-					? new FlatLineBorder( insets, lineColor, lineThickness, arc )
+						? new FlatLineBorder( insets, lineColor, lineThickness, arc )
-					: new FlatEmptyBorder( insets );
+						: new FlatEmptyBorder( insets );
-			};
+				};
+			} catch( RuntimeException ex ) {
+				throw new IllegalArgumentException( "invalid border '" + value + "' (" + ex.getMessage() + ")" );
+			}
 		} else
 			return parseInstance( value, resolver, addonClassLoaders );
 	}
@@ -719,7 +739,7 @@ class UIDefaultsLoader
 				Integer.parseInt( numbers.get( 1 ) ),
 				Integer.parseInt( numbers.get( 2 ) ),
 				Integer.parseInt( numbers.get( 3 ) ) );
-		} catch( NumberFormatException ex ) {
+		} catch( NumberFormatException | IndexOutOfBoundsException ex ) {
 			throw new IllegalArgumentException( "invalid insets '" + value + "'" );
 		}
 	}
@@ -732,7 +752,7 @@ class UIDefaultsLoader
 			return new DimensionUIResource(
 				Integer.parseInt( numbers.get( 0 ) ),
 				Integer.parseInt( numbers.get( 1 ) ) );
-		} catch( NumberFormatException ex ) {
+		} catch( NumberFormatException | IndexOutOfBoundsException ex ) {
 			throw new IllegalArgumentException( "invalid size '" + value + "'" );
 		}
 	}
@@ -826,6 +846,7 @@ class UIDefaultsLoader
 		try {
 			switch( function ) {
 				case "if":			return parseColorIf( value, params, resolver );
+				case "lazy":		return parseColorLazy( value, params, resolver );
 				case "systemColor":	return parseColorSystemColor( value, params, resolver );
 				case "rgb":			return parseColorRgbOrRgba( false, params, resolver );
 				case "rgba":		return parseColorRgbOrRgba( true, params, resolver );
@@ -873,6 +894,32 @@ class UIDefaultsLoader
 		return parseColorOrFunction( resolver.apply( ifValue ), resolver );
 	}
 
+	/**
+	 * Syntax: lazy(uiKey)
+	 * <p>
+	 * This "lazy" function is only used if the "lazy" is passed as parameter to another
+	 * color function. Otherwise, the general "lazy" function is used.
+	 * <p>
+	 * Note: The color is resolved immediately, not lazy, because it is passed as parameter to another color function.
+	 * So e.g. {@code darken(lazy(List.background), 10%)} is the same as {@code darken($List.background, 10%)}.
+	 * <p>
+	 * Only useful if a property is defined as lazy and that property is used
+	 * in another property's color function. E.g.
+	 *
+	 * <pre>{@code
+	 * someProperty = lazy(List.background)
+	 * anotherProperty = darken($someProperty, 10%)
+	 * }</pre>
+	 */
+	private static Object parseColorLazy( String value, List<String> params, Function<String, String> resolver )
+		throws IllegalArgumentException
+	{
+		if( params.size() != 1 )
+			throw newMissingParametersException( value );
+
+		return parseColorOrFunction( resolver.apply( PROPERTY_PREFIX + params.get( 0 ) ), resolver );
+	}
+
 	/**
 	 * Syntax: systemColor(name[,defaultValue])
 	 *   - name: system color name
@@ -970,7 +1017,7 @@ class UIDefaultsLoader
 	 *         fadein(color,amount[,options]) or fadeout(color,amount[,options])
 	 *   - color: a color (e.g. #f00) or a color function
 	 *   - amount: percentage 0-100%
-	 *   - options: [relative] [autoInverse] [noAutoInverse] [lazy] [derived]
+	 *   - options: [relative] [autoInverse] [noAutoInverse] [derived] [lazy]
 	 */
 	private static Object parseColorHSLIncreaseDecrease( int hslIndex, boolean increase,
 		List<String> params, Function<String, String> resolver )
@@ -980,15 +1027,15 @@ class UIDefaultsLoader
 		int amount = parsePercentage( params.get( 1 ) );
 		boolean relative = false;
 		boolean autoInverse = false;
-		boolean lazy = false;
 		boolean derived = false;
+		boolean lazy = false;
 
 		if( params.size() > 2 ) {
 			String options = params.get( 2 );
 			relative = options.contains( "relative" );
 			autoInverse = options.contains( "autoInverse" );
-			lazy = options.contains( "lazy" );
 			derived = options.contains( "derived" );
+			lazy = options.contains( "lazy" );
 
 			// use autoInverse by default for derived colors, except if noAutoInverse is set
 			if( derived && !options.contains( "noAutoInverse" ) )
@@ -999,14 +1046,8 @@ class UIDefaultsLoader
 		ColorFunction function = new ColorFunctions.HSLIncreaseDecrease(
 			hslIndex, increase, amount, relative, autoInverse );
 
-		if( lazy ) {
+		if( lazy )
-			return (LazyValue) t -> {
+			return newLazyColorFunction( colorStr, function );
-				Object color = lazyUIManagerGet( colorStr );
-				return (color instanceof Color)
-					? new ColorUIResource( ColorFunctions.applyFunctions( (Color) color, function ) )
-					: null;
-			};
-		}
 
 		// parse base color, apply function and create derived color
 		return parseFunctionBaseColor( colorStr, function, derived, resolver );
@@ -1035,14 +1076,8 @@ class UIDefaultsLoader
 		// create function
 		ColorFunction function = new ColorFunctions.Fade( amount );
 
-		if( lazy ) {
+		if( lazy )
-			return (LazyValue) t -> {
+			return newLazyColorFunction( colorStr, function );
-				Object color = lazyUIManagerGet( colorStr );
-				return (color instanceof Color)
-					? new ColorUIResource( ColorFunctions.applyFunctions( (Color) color, function ) )
-					: null;
-			};
-		}
 
 		// parse base color, apply function and create derived color
 		return parseFunctionBaseColor( colorStr, function, derived, resolver );
@@ -1052,7 +1087,7 @@ class UIDefaultsLoader
 	 * Syntax: spin(color,angle[,options])
 	 *   - color: a color (e.g. #f00) or a color function
 	 *   - angle: number of degrees to rotate
-	 *   - options: [derived]
+	 *   - options: [derived] [lazy]
 	 */
 	private static Object parseColorSpin( List<String> params, Function<String, String> resolver )
 		throws IllegalArgumentException
@@ -1060,15 +1095,20 @@ class UIDefaultsLoader
 		String colorStr = params.get( 0 );
 		int amount = parseInteger( params.get( 1 ) );
 		boolean derived = false;
+		boolean lazy = false;
 
 		if( params.size() > 2 ) {
 			String options = params.get( 2 );
 			derived = options.contains( "derived" );
+			lazy = options.contains( "lazy" );
 		}
 
 		// create function
 		ColorFunction function = new ColorFunctions.HSLIncreaseDecrease( 0, true, amount, false, false );
 
+		if( lazy )
+			return newLazyColorFunction( colorStr, function );
+
 		// parse base color, apply function and create derived color
 		return parseFunctionBaseColor( colorStr, function, derived, resolver );
 	}
@@ -1080,7 +1120,7 @@ class UIDefaultsLoader
 	 *         changeAlpha(color,value[,options])
 	 *   - color: a color (e.g. #f00) or a color function
 	 *   - value: for hue: number of degrees; otherwise: percentage 0-100%
-	 *   - options: [derived]
+	 *   - options: [derived] [lazy]
 	 */
 	private static Object parseColorChange( int hslIndex,
 		List<String> params, Function<String, String> resolver )
@@ -1091,27 +1131,33 @@ class UIDefaultsLoader
 			? parseInteger( params.get( 1 ) )
 			: parsePercentage( params.get( 1 ) );
 		boolean derived = false;
+		boolean lazy = false;
 
 		if( params.size() > 2 ) {
 			String options = params.get( 2 );
 			derived = options.contains( "derived" );
+			lazy = options.contains( "lazy" );
 		}
 
 		// create function
 		ColorFunction function = new ColorFunctions.HSLChange( hslIndex, value );
 
+		if( lazy )
+			return newLazyColorFunction( colorStr, function );
+
 		// parse base color, apply function and create derived color
 		return parseFunctionBaseColor( colorStr, function, derived, resolver );
 	}
 
 	/**
-	 * Syntax: mix(color1,color2[,weight]) or
+	 * Syntax: mix(color1,color2[,weight][,options]) or
-	 *         tint(color[,weight]) or
+	 *         tint(color[,weight][,options]) or
-	 *         shade(color[,weight])
+	 *         shade(color[,weight][,options])
 	 *   - color1: a color (e.g. #f00) or a color function
 	 *   - color2: a color (e.g. #f00) or a color function
 	 *   - weight: the weight (in range 0-100%) to mix the two colors
 	 *             larger weight uses more of first color, smaller weight more of second color
+	 *   - options: [derived] [lazy]
 	 */
 	private static Object parseColorMix( String color1Str, List<String> params, Function<String, String> resolver )
 		throws IllegalArgumentException
@@ -1120,18 +1166,36 @@ class UIDefaultsLoader
 		if( color1Str == null )
 			color1Str = params.get( i++ );
 		String color2Str = params.get( i++ );
-		int weight = (params.size() > i) ? parsePercentage( params.get( i ) ) : 50;
+		int weight = 50;
+		boolean derived = false;
+		boolean lazy = false;
+
+		if( params.size() > i ) {
+			String weightStr = params.get( i );
+			if( !weightStr.isEmpty() && Character.isDigit( weightStr.charAt( 0 ) ) ) {
+				weight = parsePercentage( weightStr );
+				i++;
+			}
+		}
+		if( params.size() > i ) {
+			String options = params.get( i );
+			derived = options.contains( "derived" );
+			lazy = options.contains( "lazy" );
+		}
 
 		// parse second color
-		ColorUIResource color2 = (ColorUIResource) parseColorOrFunction( resolver.apply( color2Str ), resolver );
+		ColorUIResource color1 = (ColorUIResource) parseColorOrFunction( resolver.apply( color1Str ), resolver );
-		if( color2 == null )
+		if( color1 == null )
 			return null;
 
 		// create function
-		ColorFunction function = new ColorFunctions.Mix( color2, weight );
+		ColorFunction function = new ColorFunctions.Mix2( color1, weight );
+
+		if( lazy )
+			return newLazyColorFunction( color2Str, function );
 
 		// parse first color, apply function and create mixed color
-		return parseFunctionBaseColor( color1Str, function, false, resolver );
+		return parseFunctionBaseColor( color2Str, function, derived, resolver );
 	}
 
 	/**
@@ -1225,6 +1289,15 @@ class UIDefaultsLoader
 		return new ColorUIResource( newColor );
 	}
 
+	private static LazyValue newLazyColorFunction( String uiKey, ColorFunction function ) {
+		return (LazyValue) t -> {
+			Object color = lazyUIManagerGet( uiKey );
+			return (color instanceof Color)
+				? new ColorUIResource( ColorFunctions.applyFunctions( (Color) color, function ) )
+				: null;
+		};
+	}
+
 	/**
 	 * Syntax: [normal] [bold|+bold|-bold] [italic|+italic|-italic] [<size>|+<incr>|-<decr>|<percent>%] [family[, family]] [$baseFontKey]
 	 */
@@ -1310,17 +1383,17 @@ class UIDefaultsLoader
 						break;
 				}
 			}
-		} catch( IOException ex ) {
+		} catch( RuntimeException | IOException ex ) {
-			throw new IllegalArgumentException( ex );
+			throw new IllegalArgumentException(  "invalid font '" + value + "' (" + ex.getMessage() + ")" );
 		}
 
 		if( style != -1 && styleChange != 0 )
-			throw new IllegalArgumentException( "can not mix absolute style (e.g. 'bold') with derived style (e.g. '+italic') in '" + value + "'" );
+			throw new IllegalArgumentException( "invalid font '" + value + "': can not mix absolute style (e.g. 'bold') with derived style (e.g. '+italic')" );
 		if( styleChange != 0 ) {
 			if( (styleChange & Font.BOLD) != 0 && (styleChange & (Font.BOLD << 16)) != 0 )
-				throw new IllegalArgumentException( "can not use '+bold' and '-bold' in '" + value + "'" );
+				throw new IllegalArgumentException( "invalid font '" + value + "': can not use '+bold' and '-bold'" );
 			if( (styleChange & Font.ITALIC) != 0 && (styleChange & (Font.ITALIC << 16)) != 0 )
-				throw new IllegalArgumentException( "can not use '+italic' and '-italic' in '" + value + "'" );
+				throw new IllegalArgumentException( "invalid font '" + value + "': can not use '+italic' and '-italic'" );
 		}
 
 		font = new FlatLaf.ActiveFont( baseFontKey, families, style, styleChange, absoluteSize, relativeSize, scaleSize );
@@ -1460,7 +1533,7 @@ class UIDefaultsLoader
 			return (LazyValue) t -> {
 				return new GrayFilter( brightness, contrast, alpha );
 			};
-		} catch( NumberFormatException ex ) {
+		} catch( NumberFormatException | IndexOutOfBoundsException ex ) {
 			throw new IllegalArgumentException( "invalid gray filter '" + value + "'" );
 		}
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatAbstractIcon.java

@@ -57,6 +57,8 @@ public abstract class FlatAbstractIcon
 //			g2.setColor( Color.blue );
 //			g2.drawRect( x, y, getIconWidth() - 1, getIconHeight() - 1 );
 
+			paintBackground( c, g2, x, y );
+
 			g2.translate( x, y );
 			UIScale.scaleGraphics( g2 );
 
@@ -69,7 +71,11 @@ public abstract class FlatAbstractIcon
 		}
 	}
 
-	protected abstract void paintIcon( Component c, Graphics2D g2 );
+	/** @since 3.5.2 */
+	protected void paintBackground( Component c, Graphics2D g, int x, int y ) {
+	}
+
+	protected abstract void paintIcon( Component c, Graphics2D g );
 
 	@Override
 	public int getIconWidth() {

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatCheckBoxIcon.java

@@ -17,6 +17,7 @@
 package com.formdev.flatlaf.icons;
 
 import static com.formdev.flatlaf.FlatClientProperties.*;
+import static com.formdev.flatlaf.ui.FlatUIUtils.stateColor;
 import java.awt.BasicStroke;
 import java.awt.Color;
 import java.awt.Component;
@@ -48,6 +49,8 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  * @uiDefault CheckBox.icon.borderWidth					int or float	optional; defaults to Component.borderWidth
  * @uiDefault CheckBox.icon.selectedBorderWidth			int or float	optional; defaults to CheckBox.icon.borderWidth
  * @uiDefault CheckBox.icon.disabledSelectedBorderWidth	int or float	optional; defaults to CheckBox.icon.selectedBorderWidth
+ * @uiDefault CheckBox.icon.indeterminateBorderWidth			int or float	optional; defaults to CheckBox.icon.selectedBorderWidth
+ * @uiDefault CheckBox.icon.disabledIndeterminateBorderWidth	int or float	optional; defaults to CheckBox.icon.disabledSelectedBorderWidth
  * @uiDefault CheckBox.arc								int
  *
  * @uiDefault CheckBox.icon.focusColor					Color	optional; defaults to Component.focusColor
@@ -56,30 +59,45 @@ import com.formdev.flatlaf.ui.FlatUIUtils;
  * @uiDefault CheckBox.icon.selectedBorderColor			Color
  * @uiDefault CheckBox.icon.selectedBackground			Color
  * @uiDefault CheckBox.icon.checkmarkColor				Color
+ * @uiDefault CheckBox.icon.indeterminateBorderColor	Color	optional; defaults to CheckBox.icon.selectedBorderColor
+ * @uiDefault CheckBox.icon.indeterminateBackground		Color	optional; defaults to CheckBox.icon.selectedBackground
+ * @uiDefault CheckBox.icon.indeterminateCheckmarkColor	Color	optional; defaults to CheckBox.icon.checkmarkColor
  *
- * @uiDefault CheckBox.icon.disabledBorderColor			Color
+ * @uiDefault CheckBox.icon.disabledBorderColor					Color
- * @uiDefault CheckBox.icon.disabledBackground			Color
+ * @uiDefault CheckBox.icon.disabledBackground					Color
- * @uiDefault CheckBox.icon.disabledSelectedBorderColor	Color	optional; CheckBox.icon.disabledBorderColor is used if not specified
+ * @uiDefault CheckBox.icon.disabledSelectedBorderColor			Color	optional; defaults to CheckBox.icon.disabledBorderColor
- * @uiDefault CheckBox.icon.disabledSelectedBackground	Color	optional; CheckBox.icon.disabledBackground is used if not specified
+ * @uiDefault CheckBox.icon.disabledSelectedBackground			Color	optional; defaults to CheckBox.icon.disabledBackground
- * @uiDefault CheckBox.icon.disabledCheckmarkColor		Color
+ * @uiDefault CheckBox.icon.disabledCheckmarkColor				Color
+ * @uiDefault CheckBox.icon.disabledIndeterminateBorderColor	Color	optional; defaults to CheckBox.icon.disabledSelectedBorderColor
+ * @uiDefault CheckBox.icon.disabledIndeterminateBackground		Color	optional; defaults to CheckBox.icon.disabledSelectedBackground
+ * @uiDefault CheckBox.icon.disabledIndeterminateCheckmarkColor	Color	optional; defaults to CheckBox.icon.disabledCheckmarkColor
  *
- * @uiDefault CheckBox.icon.focusedBorderColor			Color	optional
+ * @uiDefault CheckBox.icon.focusedBorderColor					Color	optional
- * @uiDefault CheckBox.icon.focusedBackground			Color	optional
+ * @uiDefault CheckBox.icon.focusedBackground					Color	optional
- * @uiDefault CheckBox.icon.focusedSelectedBorderColor	Color	optional; CheckBox.icon.focusedBorderColor is used if not specified
+ * @uiDefault CheckBox.icon.focusedSelectedBorderColor			Color	optional; defaults to CheckBox.icon.focusedBorderColor
- * @uiDefault CheckBox.icon.focusedSelectedBackground	Color	optional; CheckBox.icon.focusedBackground is used if not specified
+ * @uiDefault CheckBox.icon.focusedSelectedBackground			Color	optional; defaults to CheckBox.icon.focusedBackground
- * @uiDefault CheckBox.icon.focusedCheckmarkColor		Color	optional; CheckBox.icon.checkmarkColor is used if not specified
+ * @uiDefault CheckBox.icon.focusedCheckmarkColor				Color	optional; defaults to CheckBox.icon.checkmarkColor
+ * @uiDefault CheckBox.icon.focusedIndeterminateBorderColor		Color	optional; defaults to CheckBox.icon.focusedSelectedBorderColor
+ * @uiDefault CheckBox.icon.focusedIndeterminateBackground		Color	optional; defaults to CheckBox.icon.focusedSelectedBackground
+ * @uiDefault CheckBox.icon.focusedIndeterminateCheckmarkColor	Color	optional; defaults to CheckBox.icon.focusedCheckmarkColor
  *
- * @uiDefault CheckBox.icon.hoverBorderColor			Color	optional
+ * @uiDefault CheckBox.icon.hoverBorderColor					Color	optional
- * @uiDefault CheckBox.icon.hoverBackground				Color	optional
+ * @uiDefault CheckBox.icon.hoverBackground						Color	optional
- * @uiDefault CheckBox.icon.hoverSelectedBorderColor	Color	optional; CheckBox.icon.hoverBorderColor is used if not specified
+ * @uiDefault CheckBox.icon.hoverSelectedBorderColor			Color	optional; defaults to CheckBox.icon.hoverBorderColor
- * @uiDefault CheckBox.icon.hoverSelectedBackground		Color	optional; CheckBox.icon.hoverBackground is used if not specified
+ * @uiDefault CheckBox.icon.hoverSelectedBackground				Color	optional; defaults to CheckBox.icon.hoverBackground
- * @uiDefault CheckBox.icon.hoverCheckmarkColor			Color	optional; CheckBox.icon.checkmarkColor is used if not specified
+ * @uiDefault CheckBox.icon.hoverCheckmarkColor					Color	optional; defaults to CheckBox.icon.checkmarkColor
+ * @uiDefault CheckBox.icon.hoverIndeterminateBorderColor		Color	optional; defaults to CheckBox.icon.hoverSelectedBorderColor
+ * @uiDefault CheckBox.icon.hoverIndeterminateBackground		Color	optional; defaults to CheckBox.icon.hoverSelectedBackground
+ * @uiDefault CheckBox.icon.hoverIndeterminateCheckmarkColor	Color	optional; defaults to CheckBox.icon.hoverCheckmarkColor
  *
- * @uiDefault CheckBox.icon.pressedBorderColor			Color	optional
+ * @uiDefault CheckBox.icon.pressedBorderColor					Color	optional
- * @uiDefault CheckBox.icon.pressedBackground			Color	optional
+ * @uiDefault CheckBox.icon.pressedBackground					Color	optional
- * @uiDefault CheckBox.icon.pressedSelectedBorderColor	Color	optional; CheckBox.icon.pressedBorderColor is used if not specified
+ * @uiDefault CheckBox.icon.pressedSelectedBorderColor			Color	optional; defaults to CheckBox.icon.pressedBorderColor
- * @uiDefault CheckBox.icon.pressedSelectedBackground	Color	optional; CheckBox.icon.pressedBackground is used if not specified
+ * @uiDefault CheckBox.icon.pressedSelectedBackground			Color	optional; defaults to CheckBox.icon.pressedBackground
- * @uiDefault CheckBox.icon.pressedCheckmarkColor		Color	optional; CheckBox.icon.checkmarkColor is used if not specified
+ * @uiDefault CheckBox.icon.pressedCheckmarkColor				Color	optional; defaults to CheckBox.icon.checkmarkColor
+ * @uiDefault CheckBox.icon.pressedIndeterminateBorderColor		Color	optional; defaults to CheckBox.icon.pressedSelectedBorderColor
+ * @uiDefault CheckBox.icon.pressedIndeterminateBackground		Color	optional; defaults to CheckBox.icon.pressedSelectedBackground
+ * @uiDefault CheckBox.icon.pressedIndeterminateCheckmarkColor	Color	optional; defaults to CheckBox.icon.pressedCheckmarkColor
  *
  * @author Karl Tauber
  */
@@ -92,6 +110,8 @@ public class FlatCheckBoxIcon
 	/** @since 2 */ @Styleable protected float borderWidth = getUIFloat( "CheckBox.icon.borderWidth", FlatUIUtils.getUIFloat( "Component.borderWidth", 1 ), style );
 	/** @since 2 */ @Styleable protected float selectedBorderWidth = getUIFloat( "CheckBox.icon.selectedBorderWidth", Float.MIN_VALUE, style );
 	/** @since 2 */ @Styleable protected float disabledSelectedBorderWidth = getUIFloat( "CheckBox.icon.disabledSelectedBorderWidth", Float.MIN_VALUE, style );
+	/** @since 3.6 */ @Styleable protected float indeterminateBorderWidth = getUIFloat( "CheckBox.icon.indeterminateBorderWidth", Float.MIN_VALUE, style );
+	/** @since 3.6 */ @Styleable protected float disabledIndeterminateBorderWidth = getUIFloat( "CheckBox.icon.disabledIndeterminateBorderWidth", Float.MIN_VALUE, style );
 	@Styleable protected int arc = FlatUIUtils.getUIInt( "CheckBox.arc", 2 );
 
 	// enabled
@@ -100,6 +120,9 @@ public class FlatCheckBoxIcon
 	@Styleable protected Color selectedBorderColor = getUIColor( "CheckBox.icon.selectedBorderColor", style );
 	@Styleable protected Color selectedBackground = getUIColor( "CheckBox.icon.selectedBackground", style );
 	@Styleable protected Color checkmarkColor = getUIColor( "CheckBox.icon.checkmarkColor", style );
+	/** @since 3.6 */ @Styleable protected Color indeterminateBorderColor = getUIColor( "CheckBox.icon.indeterminateBorderColor", style );
+	/** @since 3.6 */ @Styleable protected Color indeterminateBackground = getUIColor( "CheckBox.icon.indeterminateBackground", style );
+	/** @since 3.6 */ @Styleable protected Color indeterminateCheckmarkColor = getUIColor( "CheckBox.icon.indeterminateCheckmarkColor", style );
 
 	// disabled
 	@Styleable protected Color disabledBorderColor = getUIColor( "CheckBox.icon.disabledBorderColor", style );
@@ -107,6 +130,9 @@ public class FlatCheckBoxIcon
 	/** @since 2 */ @Styleable protected Color disabledSelectedBorderColor = getUIColor( "CheckBox.icon.disabledSelectedBorderColor", style );
 	/** @since 2 */ @Styleable protected Color disabledSelectedBackground = getUIColor( "CheckBox.icon.disabledSelectedBackground", style );
 	@Styleable protected Color disabledCheckmarkColor = getUIColor( "CheckBox.icon.disabledCheckmarkColor", style );
+	/** @since 3.6 */ @Styleable protected Color disabledIndeterminateBorderColor = getUIColor( "CheckBox.icon.disabledIndeterminateBorderColor", style );
+	/** @since 3.6 */ @Styleable protected Color disabledIndeterminateBackground = getUIColor( "CheckBox.icon.disabledIndeterminateBackground", style );
+	/** @since 3.6 */ @Styleable protected Color disabledIndeterminateCheckmarkColor = getUIColor( "CheckBox.icon.disabledIndeterminateCheckmarkColor", style );
 
 	// focused
 	@Styleable protected Color focusedBorderColor = getUIColor( "CheckBox.icon.focusedBorderColor", style );
@@ -114,6 +140,9 @@ public class FlatCheckBoxIcon
 	/** @since 2 */ @Styleable protected Color focusedSelectedBorderColor = getUIColor( "CheckBox.icon.focusedSelectedBorderColor", style );
 	/** @since 2 */ @Styleable protected Color focusedSelectedBackground = getUIColor( "CheckBox.icon.focusedSelectedBackground", style );
 	/** @since 2 */ @Styleable protected Color focusedCheckmarkColor = getUIColor( "CheckBox.icon.focusedCheckmarkColor", style );
+	/** @since 3.6 */ @Styleable protected Color focusedIndeterminateBorderColor = getUIColor( "CheckBox.icon.focusedIndeterminateBorderColor", style );
+	/** @since 3.6 */ @Styleable protected Color focusedIndeterminateBackground = getUIColor( "CheckBox.icon.focusedIndeterminateBackground", style );
+	/** @since 3.6 */ @Styleable protected Color focusedIndeterminateCheckmarkColor = getUIColor( "CheckBox.icon.focusedIndeterminateCheckmarkColor", style );
 
 	// hover
 	@Styleable protected Color hoverBorderColor = getUIColor( "CheckBox.icon.hoverBorderColor", style );
@@ -121,6 +150,9 @@ public class FlatCheckBoxIcon
 	/** @since 2 */ @Styleable protected Color hoverSelectedBorderColor = getUIColor( "CheckBox.icon.hoverSelectedBorderColor", style );
 	/** @since 2 */ @Styleable protected Color hoverSelectedBackground = getUIColor( "CheckBox.icon.hoverSelectedBackground", style );
 	/** @since 2 */ @Styleable protected Color hoverCheckmarkColor = getUIColor( "CheckBox.icon.hoverCheckmarkColor", style );
+	/** @since 3.6 */ @Styleable protected Color hoverIndeterminateBorderColor = getUIColor( "CheckBox.icon.hoverIndeterminateBorderColor", style );
+	/** @since 3.6 */ @Styleable protected Color hoverIndeterminateBackground = getUIColor( "CheckBox.icon.hoverIndeterminateBackground", style );
+	/** @since 3.6 */ @Styleable protected Color hoverIndeterminateCheckmarkColor = getUIColor( "CheckBox.icon.hoverIndeterminateCheckmarkColor", style );
 
 	// pressed
 	/** @since 2 */ @Styleable protected Color pressedBorderColor = getUIColor( "CheckBox.icon.pressedBorderColor", style );
@@ -128,6 +160,9 @@ public class FlatCheckBoxIcon
 	/** @since 2 */ @Styleable protected Color pressedSelectedBorderColor = getUIColor( "CheckBox.icon.pressedSelectedBorderColor", style );
 	/** @since 2 */ @Styleable protected Color pressedSelectedBackground = getUIColor( "CheckBox.icon.pressedSelectedBackground", style );
 	/** @since 2 */ @Styleable protected Color pressedCheckmarkColor = getUIColor( "CheckBox.icon.pressedCheckmarkColor", style );
+	/** @since 3.6 */ @Styleable protected Color pressedIndeterminateBorderColor = getUIColor( "CheckBox.icon.pressedIndeterminateBorderColor", style );
+	/** @since 3.6 */ @Styleable protected Color pressedIndeterminateBackground = getUIColor( "CheckBox.icon.pressedIndeterminateBackground", style );
+	/** @since 3.6 */ @Styleable protected Color pressedIndeterminateCheckmarkColor = getUIColor( "CheckBox.icon.pressedIndeterminateCheckmarkColor", style );
 
 	protected String getPropertyPrefix() {
 		return "CheckBox.";
@@ -182,11 +217,17 @@ public class FlatCheckBoxIcon
 		boolean indeterminate = isIndeterminate( c );
 		boolean selected = indeterminate || isSelected( c );
 		boolean isFocused = FlatUIUtils.isPermanentFocusOwner( c );
-		float bw = selected
+		float bw = Float.MIN_VALUE;
-			? (disabledSelectedBorderWidth != Float.MIN_VALUE && !c.isEnabled()
+		if( !c.isEnabled() ) {
-				? disabledSelectedBorderWidth
+			bw = (indeterminate && disabledIndeterminateBorderWidth != Float.MIN_VALUE)
-				: (selectedBorderWidth != Float.MIN_VALUE ? selectedBorderWidth : borderWidth))
+				? disabledIndeterminateBorderWidth
-			: borderWidth;
+				: (selected ? disabledSelectedBorderWidth : selectedBorderWidth);
+		}
+		if( bw == Float.MIN_VALUE ) {
+			bw = (indeterminate && indeterminateBorderWidth != Float.MIN_VALUE)
+				? indeterminateBorderWidth
+				: ((selected && selectedBorderWidth != Float.MIN_VALUE) ? selectedBorderWidth : borderWidth);
+		}
 
 		// paint focused border
 		if( isFocused && focusWidth > 0 && FlatButtonUI.isFocusPainted( c ) ) {
@@ -195,15 +236,15 @@ public class FlatCheckBoxIcon
 		}
 
 		// paint border
-		g.setColor( getBorderColor( c, selected ) );
+		g.setColor( getBorderColor( c, selected, indeterminate ) );
 		paintBorder( c, g, bw );
 
 		// paint background
-		Color bg = FlatUIUtils.deriveColor( getBackground( c, selected ),
+		Color baseBg = stateColor( indeterminate, indeterminateBackground, selected, selectedBackground, background );
-			selected ? selectedBackground : background );
+		Color bg = FlatUIUtils.deriveColor( getBackground( c, selected, indeterminate ), baseBg );
 		if( bg.getAlpha() < 255 ) {
 			// fill background with default color before filling with non-opaque background
-			g.setColor( selected ? selectedBackground : background );
+			g.setColor( baseBg );
 			paintBackground( c, g, bw );
 		}
 		g.setColor( bg );
@@ -211,7 +252,7 @@ public class FlatCheckBoxIcon
 
 		// paint checkmark
 		if( selected ) {
-			g.setColor( getCheckmarkColor( c ) );
+			g.setColor( getCheckmarkColor( c, indeterminate ) );
 			if( indeterminate )
 				paintIndeterminate( c, g );
 			else
@@ -272,30 +313,33 @@ public class FlatCheckBoxIcon
 		return focusColor;
 	}
 
-	protected Color getBorderColor( Component c, boolean selected ) {
+	/** @since 3.6 */
+	protected Color getBorderColor( Component c, boolean selected, boolean indeterminate ) {
 		return FlatButtonUI.buttonStateColor( c,
-			selected ? selectedBorderColor : borderColor,
+			stateColor( indeterminate, indeterminateBorderColor,         selected, selectedBorderColor,         borderColor ),
-			(selected && disabledSelectedBorderColor != null) ? disabledSelectedBorderColor : disabledBorderColor,
+			stateColor( indeterminate, disabledIndeterminateBorderColor, selected, disabledSelectedBorderColor, disabledBorderColor ),
-			(selected && focusedSelectedBorderColor != null) ? focusedSelectedBorderColor : focusedBorderColor,
+			stateColor( indeterminate, focusedIndeterminateBorderColor,  selected, focusedSelectedBorderColor,  focusedBorderColor ),
-			(selected && hoverSelectedBorderColor != null) ? hoverSelectedBorderColor : hoverBorderColor,
+			stateColor( indeterminate, hoverIndeterminateBorderColor,    selected, hoverSelectedBorderColor,    hoverBorderColor ),
-			(selected && pressedSelectedBorderColor != null) ? pressedSelectedBorderColor : pressedBorderColor );
+			stateColor( indeterminate, pressedIndeterminateBorderColor,  selected, pressedSelectedBorderColor,  pressedBorderColor ) );
 	}
 
-	protected Color getBackground( Component c, boolean selected ) {
+	/** @since 3.6 */
+	protected Color getBackground( Component c, boolean selected, boolean indeterminate ) {
 		return FlatButtonUI.buttonStateColor( c,
-			selected ? selectedBackground : background,
+			stateColor( indeterminate, indeterminateBackground,          selected, selectedBackground,          background ),
-			(selected && disabledSelectedBackground != null) ? disabledSelectedBackground : disabledBackground,
+			stateColor( indeterminate, disabledIndeterminateBackground,  selected, disabledSelectedBackground,  disabledBackground ),
-			(selected && focusedSelectedBackground != null) ? focusedSelectedBackground : focusedBackground,
+			stateColor( indeterminate, focusedIndeterminateBackground,   selected, focusedSelectedBackground,   focusedBackground ),
-			(selected && hoverSelectedBackground != null) ? hoverSelectedBackground : hoverBackground,
+			stateColor( indeterminate, hoverIndeterminateBackground,     selected, hoverSelectedBackground,     hoverBackground ),
-			(selected && pressedSelectedBackground != null) ? pressedSelectedBackground : pressedBackground );
+			stateColor( indeterminate, pressedIndeterminateBackground,   selected, pressedSelectedBackground,   pressedBackground ) );
 	}
 
-	protected Color getCheckmarkColor( Component c ) {
+	/** @since 3.6 */
+	protected Color getCheckmarkColor( Component c, boolean indeterminate ) {
 		return FlatButtonUI.buttonStateColor( c,
-			checkmarkColor,
+			stateColor( indeterminate, indeterminateCheckmarkColor, checkmarkColor ),
-			disabledCheckmarkColor,
+			stateColor( indeterminate, disabledIndeterminateCheckmarkColor, disabledCheckmarkColor ),
-			focusedCheckmarkColor,
+			stateColor( indeterminate, focusedIndeterminateCheckmarkColor, focusedCheckmarkColor ),
-			hoverCheckmarkColor,
+			stateColor( indeterminate, hoverIndeterminateCheckmarkColor, hoverCheckmarkColor ),
-			pressedCheckmarkColor );
+			stateColor( indeterminate, pressedIndeterminateCheckmarkColor, pressedCheckmarkColor ) );
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatWindowAbstractIcon.java

@@ -18,76 +18,141 @@ package com.formdev.flatlaf.icons;
 
 import java.awt.Color;
 import java.awt.Component;
+import java.awt.Container;
 import java.awt.Dimension;
 import java.awt.Graphics2D;
-import java.awt.RenderingHints;
+import java.awt.Insets;
+import java.awt.Window;
+import javax.swing.SwingUtilities;
 import com.formdev.flatlaf.ui.FlatButtonUI;
+import com.formdev.flatlaf.ui.FlatTitlePane;
 import com.formdev.flatlaf.ui.FlatUIUtils;
+import com.formdev.flatlaf.util.DerivedColor;
 import com.formdev.flatlaf.util.HiDPIUtils;
+import com.formdev.flatlaf.util.UIScale;
 
 /**
  * Base class for window icons.
  *
  * @uiDefault TitlePane.buttonSize						Dimension
+ * @uiDefault TitlePane.buttonInsets					Insets	optional
+ * @uiDefault TitlePane.buttonArc						int		optional
  * @uiDefault TitlePane.buttonSymbolHeight				int
- * @uiDefault TitlePane.buttonHoverBackground			Color
+ * @uiDefault TitlePane.buttonBackground				Color	optional
- * @uiDefault TitlePane.buttonPressedBackground			Color
+ * @uiDefault TitlePane.buttonForeground				Color	optional
+ * @uiDefault TitlePane.buttonInactiveBackground		Color	optional
+ * @uiDefault TitlePane.buttonInactiveForeground		Color	optional
+ * @uiDefault TitlePane.buttonHoverBackground			Color	optional
+ * @uiDefault TitlePane.buttonHoverForeground			Color	optional
+ * @uiDefault TitlePane.buttonPressedBackground			Color	optional
+ * @uiDefault TitlePane.buttonPressedForeground			Color	optional
  *
  * @author Karl Tauber
  */
 public abstract class FlatWindowAbstractIcon
 	extends FlatAbstractIcon
 {
-	private final int symbolHeight;
+	/** @since 3.6 */ protected final Insets insets;
-	private final Color hoverBackground;
+	/** @since 3.6 */ protected final int arc;
-	private final Color pressedBackground;
+	/** @since 3.6 */ protected final int symbolHeight;
+
+	/** @since 3.6 */ protected final Color background;
+	/** @since 3.6 */ protected final Color foreground;
+	/** @since 3.6 */ protected final Color inactiveBackground;
+	/** @since 3.6 */ protected final Color inactiveForeground;
+	protected final Color hoverBackground;
+	/** @since 3.6 */ protected final Color hoverForeground;
+	protected final Color pressedBackground;
+	/** @since 3.6 */ protected final Color pressedForeground;
 
 	/** @since 3.2 */
 	protected FlatWindowAbstractIcon( String windowStyle ) {
-		this( FlatUIUtils.getSubUIDimension( "TitlePane.buttonSize", windowStyle ),
+		this( windowStyle, null, null, null, null, null, null, null, null );
-			FlatUIUtils.getSubUIInt( "TitlePane.buttonSymbolHeight", windowStyle, 10 ),
-			FlatUIUtils.getSubUIColor( "TitlePane.buttonHoverBackground", windowStyle ),
-			FlatUIUtils.getSubUIColor( "TitlePane.buttonPressedBackground", windowStyle ) );
 	}
 
-	/** @since 3.2 */
+	/** @since 3.6 */
-	protected FlatWindowAbstractIcon( Dimension size, int symbolHeight, Color hoverBackground, Color pressedBackground ) {
+	protected FlatWindowAbstractIcon( String windowStyle,
+		Color background, Color foreground, Color inactiveBackground, Color inactiveForeground,
+		Color hoverBackground, Color hoverForeground, Color pressedBackground, Color pressedForeground )
+	{
+		this( FlatUIUtils.getSubUIDimension( "TitlePane.buttonSize", windowStyle ),
+			FlatUIUtils.getSubUIInsets( "TitlePane.buttonInsets", windowStyle ),
+			FlatUIUtils.getSubUIInt( "TitlePane.buttonArc", windowStyle, 0 ),
+			FlatUIUtils.getSubUIInt( "TitlePane.buttonSymbolHeight", windowStyle, 10 ),
+			(background != null) ? background : FlatUIUtils.getSubUIColor( "TitlePane.buttonBackground", windowStyle ),
+			(foreground != null) ? foreground : FlatUIUtils.getSubUIColor( "TitlePane.buttonForeground", windowStyle ),
+			(inactiveBackground != null) ? inactiveBackground : FlatUIUtils.getSubUIColor( "TitlePane.buttonInactiveBackground", windowStyle ),
+			(inactiveForeground != null) ? inactiveForeground : FlatUIUtils.getSubUIColor( "TitlePane.buttonInactiveForeground", windowStyle ),
+			(hoverBackground != null) ? hoverBackground : FlatUIUtils.getSubUIColor( "TitlePane.buttonHoverBackground", windowStyle ),
+			(hoverForeground != null) ? hoverForeground : FlatUIUtils.getSubUIColor( "TitlePane.buttonHoverForeground", windowStyle ),
+			(pressedBackground != null) ? pressedBackground : FlatUIUtils.getSubUIColor( "TitlePane.buttonPressedBackground", windowStyle ),
+			(pressedForeground != null) ? pressedForeground : FlatUIUtils.getSubUIColor( "TitlePane.buttonPressedForeground", windowStyle ) );
+	}
+
+	/** @since 3.6 */
+	protected FlatWindowAbstractIcon( Dimension size, Insets insets, int arc, int symbolHeight,
+		Color background, Color foreground, Color inactiveBackground, Color inactiveForeground,
+		Color hoverBackground, Color hoverForeground, Color pressedBackground, Color pressedForeground )
+	{
 		super( size.width, size.height, null );
+		this.insets = (insets != null) ? insets : new Insets( 0, 0, 0, 0 );
+		this.arc = arc;
 		this.symbolHeight = symbolHeight;
+
+		this.background = background;
+		this.foreground = foreground;
+		this.inactiveBackground = inactiveBackground;
+		this.inactiveForeground = inactiveForeground;
 		this.hoverBackground = hoverBackground;
+		this.hoverForeground = hoverForeground;
 		this.pressedBackground = pressedBackground;
+		this.pressedForeground = pressedForeground;
 	}
 
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
-		paintBackground( c, g );
-
 		g.setColor( getForeground( c ) );
 		HiDPIUtils.paintAtScale1x( g, 0, 0, width, height, this::paintIconAt1x );
 	}
 
 	protected abstract void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor );
 
-	protected void paintBackground( Component c, Graphics2D g ) {
+	/** @since 3.5.2 */
-		Color background = FlatButtonUI.buttonStateColor( c, null, null, null, hoverBackground, pressedBackground );
+	@Override
+	protected void paintBackground( Component c, Graphics2D g, int x, int y ) {
+		Color bg = null;
+		if( background != null || inactiveBackground != null ) {
+			Window window = SwingUtilities.windowForComponent( c );
+			bg = (window == null || window.isActive()) ? background : inactiveBackground;
+		}
+
+		Color background = FlatButtonUI.buttonStateColor( c, bg, null, null, hoverBackground, pressedBackground );
 		if( background != null ) {
-			// disable antialiasing for background rectangle painting to avoid blurry edges when scaled (e.g. at 125% or 175%)
+			Insets insets = UIScale.scale( this.insets );
-			Object oldHint = g.getRenderingHint( RenderingHints.KEY_ANTIALIASING );
+			float arc = UIScale.scale( (float) this.arc );
-			g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF );
 
-			g.setColor( FlatUIUtils.deriveColor( background, c.getBackground() ) );
+			// derive color from title pane background
-			g.fillRect( 0, 0, width, height );
+			if( background instanceof DerivedColor ) {
+				Container titlePane = SwingUtilities.getAncestorOfClass( FlatTitlePane.class, c );
+				Component baseComp = (titlePane != null) ? titlePane : c;
+				background = FlatUIUtils.deriveColor( background, baseComp.getBackground() );
+			}
 
-			g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, oldHint );
+			g.setColor( background );
+			FlatUIUtils.paintComponentBackground( g, insets.left, insets.top,
+				c.getWidth() - insets.left - insets.right,
+				c.getHeight() - insets.top - insets.bottom,
+				0, arc );
 		}
 	}
 
 	protected Color getForeground( Component c ) {
-		return c.getForeground();
+		Color fg = null;
-	}
+		if( foreground != null || inactiveForeground != null ) {
-
+			Window window = SwingUtilities.windowForComponent( c );
-	/** @since 3.2 */
+			fg = (window == null || window.isActive()) ? foreground : inactiveForeground;
-	protected int getSymbolHeight() {
+		}
-		return symbolHeight;
+		return FlatButtonUI.buttonStateColor( c, (fg != null) ? fg : c.getForeground(),
+			null, null, hoverForeground, pressedForeground );
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatWindowCloseIcon.java

@@ -17,53 +17,54 @@
 package com.formdev.flatlaf.icons;
 
 import java.awt.BasicStroke;
-import java.awt.Color;
-import java.awt.Component;
 import java.awt.Graphics2D;
 import java.awt.geom.Path2D;
-import com.formdev.flatlaf.ui.FlatButtonUI;
 import com.formdev.flatlaf.ui.FlatUIUtils;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * "close" icon for windows (frames and dialogs).
  *
- * @uiDefault TitlePane.closeHoverBackground			Color
+ * @uiDefault TitlePane.closeBackground					Color	optional
- * @uiDefault TitlePane.closePressedBackground			Color
+ * @uiDefault TitlePane.closeForeground					Color	optional
- * @uiDefault TitlePane.closeHoverForeground			Color
+ * @uiDefault TitlePane.closeInactiveBackground			Color	optional
- * @uiDefault TitlePane.closePressedForeground			Color
+ * @uiDefault TitlePane.closeInactiveForeground			Color	optional
+ * @uiDefault TitlePane.closeHoverBackground			Color	optional
+ * @uiDefault TitlePane.closeHoverForeground			Color	optional
+ * @uiDefault TitlePane.closePressedBackground			Color	optional
+ * @uiDefault TitlePane.closePressedForeground			Color	optional
  *
  * @author Karl Tauber
  */
 public class FlatWindowCloseIcon
 	extends FlatWindowAbstractIcon
 {
-	private final Color hoverForeground;
-	private final Color pressedForeground;
-
 	public FlatWindowCloseIcon() {
 		this( null );
 	}
 
 	/** @since 3.2 */
 	public FlatWindowCloseIcon( String windowStyle ) {
-		super( FlatUIUtils.getSubUIDimension( "TitlePane.buttonSize", windowStyle ),
+		super( windowStyle,
-			FlatUIUtils.getSubUIInt( "TitlePane.buttonSymbolHeight", windowStyle, 10 ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closeBackground", windowStyle ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closeForeground", windowStyle ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closeInactiveBackground", windowStyle ),
+			FlatUIUtils.getSubUIColor( "TitlePane.closeInactiveForeground", windowStyle ),
 			FlatUIUtils.getSubUIColor( "TitlePane.closeHoverBackground", windowStyle ),
-			FlatUIUtils.getSubUIColor( "TitlePane.closePressedBackground", windowStyle ) );
+			FlatUIUtils.getSubUIColor( "TitlePane.closeHoverForeground", windowStyle ),
-
+			FlatUIUtils.getSubUIColor( "TitlePane.closePressedBackground", windowStyle ),
-		hoverForeground = FlatUIUtils.getSubUIColor( "TitlePane.closeHoverForeground", windowStyle );
+			FlatUIUtils.getSubUIColor( "TitlePane.closePressedForeground", windowStyle ) );
-		pressedForeground = FlatUIUtils.getSubUIColor( "TitlePane.closePressedForeground", windowStyle );
 	}
 
 	@Override
 	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-		int iwh = (int) (getSymbolHeight() * scaleFactor);
+		int iwh = (int) (symbolHeight * scaleFactor);
 		int ix = x + ((width - iwh) / 2);
 		int iy = y + ((height - iwh) / 2);
 		int ix2 = ix + iwh - 1;
 		int iy2 = iy + iwh - 1;
-		float thickness = SystemInfo.isWindows_11_orLater ? (float) scaleFactor : (int) scaleFactor;
+		boolean isWindows10 = SystemInfo.isWindows_10_orLater && !SystemInfo.isWindows_11_orLater;
+		float thickness = Math.max( isWindows10 ? (int) scaleFactor : (float) scaleFactor, 1 );
 
 		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD, 4 );
 		path.moveTo( ix, iy );
@@ -73,9 +74,4 @@ public class FlatWindowCloseIcon
 		g.setStroke( new BasicStroke( thickness ) );
 		g.draw( path );
 	}
-
-	@Override
-	protected Color getForeground( Component c ) {
-		return FlatButtonUI.buttonStateColor( c, c.getForeground(), null, null, hoverForeground, pressedForeground );
-	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatWindowIconifyIcon.java

@@ -37,8 +37,8 @@ public class FlatWindowIconifyIcon
 
 	@Override
 	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-		int iw = (int) (getSymbolHeight() * scaleFactor);
+		int iw = (int) (symbolHeight * scaleFactor);
-		int ih = (int) scaleFactor;
+		int ih = Math.max( (int) scaleFactor, 1 );
 		int ix = x + ((width - iw) / 2);
 		int iy = y + ((height - ih) / 2);
 

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatWindowMaximizeIcon.java

@@ -39,10 +39,11 @@ public class FlatWindowMaximizeIcon
 
 	@Override
 	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-		int iwh = (int) (getSymbolHeight() * scaleFactor);
+		int iwh = (int) (symbolHeight * scaleFactor);
 		int ix = x + ((width - iwh) / 2);
 		int iy = y + ((height - iwh) / 2);
-		float thickness = SystemInfo.isWindows_11_orLater ? (float) scaleFactor : (int) scaleFactor;
+		boolean isWindows10 = SystemInfo.isWindows_10_orLater && !SystemInfo.isWindows_11_orLater;
+		float thickness = Math.max( isWindows10 ? (int) scaleFactor : (float) scaleFactor, 1 );
 		int arc = Math.max( (int) (1.5 * scaleFactor), 2 );
 
 		g.fill( SystemInfo.isWindows_11_orLater

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatWindowRestoreIcon.java

@@ -42,14 +42,15 @@ public class FlatWindowRestoreIcon
 
 	@Override
 	protected void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-		int iwh = (int) (getSymbolHeight() * scaleFactor);
+		int iwh = (int) (symbolHeight * scaleFactor);
 		int ix = x + ((width - iwh) / 2);
 		int iy = y + ((height - iwh) / 2);
-		float thickness = SystemInfo.isWindows_11_orLater ? (float) scaleFactor : (int) scaleFactor;
+		boolean isWindows10 = SystemInfo.isWindows_10_orLater && !SystemInfo.isWindows_11_orLater;
+		float thickness = Math.max( isWindows10 ? (int) scaleFactor : (float) scaleFactor, 1 );
 		int arc = Math.max( (int) (1.5 * scaleFactor), 2 );
 		int arcOuter = (int) (arc + (1.5 * scaleFactor));
 
-		int rwh = (int) ((getSymbolHeight() - 2) * scaleFactor);
+		int rwh = (int) ((symbolHeight - 2) * scaleFactor);
 		int ro2 = iwh - rwh;
 
 		// upper-right rectangle

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatBorder.java

@@ -59,6 +59,8 @@ import com.formdev.flatlaf.util.DerivedColor;
  * @uiDefault Component.error.focusedBorderColor		Color
  * @uiDefault Component.warning.borderColor				Color
  * @uiDefault Component.warning.focusedBorderColor		Color
+ * @uiDefault Component.success.borderColor				Color
+ * @uiDefault Component.success.focusedBorderColor		Color
  * @uiDefault Component.custom.borderColor				Color
  *
  * @author Karl Tauber
@@ -81,6 +83,8 @@ public class FlatBorder
 	@Styleable(dot=true) protected Color errorFocusedBorderColor = UIManager.getColor( "Component.error.focusedBorderColor" );
 	@Styleable(dot=true) protected Color warningBorderColor = UIManager.getColor( "Component.warning.borderColor" );
 	@Styleable(dot=true) protected Color warningFocusedBorderColor = UIManager.getColor( "Component.warning.focusedBorderColor" );
+	/** @since 3.6 */ @Styleable(dot=true) protected Color successBorderColor = UIManager.getColor( "Component.success.borderColor" );
+	/** @since 3.6 */ @Styleable(dot=true) protected Color successFocusedBorderColor = UIManager.getColor( "Component.success.focusedBorderColor" );
 	@Styleable(dot=true) protected Color customBorderColor = UIManager.getColor( "Component.custom.borderColor" );
 
 	// only used via styling (not in UI defaults, but has likewise client properties)
@@ -135,7 +139,7 @@ public class FlatBorder
 			Paint borderColor = (outlineColor != null) ? outlineColor : getBorderColor( c );
 			FlatUIUtils.paintOutlinedComponent( g2, x, y, width, height,
 				focusWidth, 1, focusInnerWidth, borderWidth, arc,
-				focusColor, borderColor, null );
+				focusColor, borderColor, null, c instanceof JScrollPane );
 		} finally {
 			g2.dispose();
 		}
@@ -168,6 +172,9 @@ public class FlatBorder
 
 				case FlatClientProperties.OUTLINE_WARNING:
 					return isFocused( c ) ? warningFocusedBorderColor : warningBorderColor;
+
+				case FlatClientProperties.OUTLINE_SUCCESS:
+					return isFocused( c ) ? successFocusedBorderColor : successBorderColor;
 			}
 		} else if( outline instanceof Color ) {
 			Color color = (Color) outline;
@@ -277,7 +284,7 @@ public class FlatBorder
 	}
 
 	/**
-	 * Returns the (unscaled) arc diameter of the border.
+	 * Returns the (unscaled) arc diameter of the border corners.
 	 */
 	protected int getArc( Component c ) {
 		return 0;

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatButtonBorder.java

@@ -42,6 +42,13 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Button.disabledBorderColor		Color
  * @uiDefault Button.focusedBorderColor			Color
  * @uiDefault Button.hoverBorderColor			Color	optional
+ * @uiDefault Button.pressedBorderColor			Color	optional
+ *
+ * @uiDefault Button.selectedBorderColor		Color	optional
+ * @uiDefault Button.disabledSelectedBorderColor Color	optional
+ * @uiDefault Button.focusedSelectedBorderColor	Color	optional
+ * @uiDefault Button.hoverSelectedBorderColor	Color	optional
+ * @uiDefault Button.pressedSelectedBorderColor	Color	optional
  *
  * @uiDefault Button.default.borderWidth		int or float
  * @uiDefault Button.default.borderColor		Color
@@ -49,6 +56,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Button.default.endBorderColor		Color	optional; if set, a gradient paint is used
  * @uiDefault Button.default.focusedBorderColor	Color
  * @uiDefault Button.default.focusColor			Color
+ * @uiDefault Button.default.pressedBorderColor	Color	optional
  * @uiDefault Button.default.hoverBorderColor	Color	optional
  *
  * @uiDefault Button.toolbar.focusWidth			int or float		optional; default is 1.5
@@ -65,6 +73,13 @@ public class FlatButtonBorder
 
 	protected Color endBorderColor = UIManager.getColor( "Button.endBorderColor" );
 	@Styleable protected Color hoverBorderColor = UIManager.getColor( "Button.hoverBorderColor" );
+	/** @since 3.5 */ @Styleable protected Color pressedBorderColor = UIManager.getColor( "Button.pressedBorderColor" );
+
+	/** @since 3.5 */ @Styleable protected Color selectedBorderColor = UIManager.getColor( "Button.selectedBorderColor" );
+	/** @since 3.5 */ @Styleable protected Color disabledSelectedBorderColor = UIManager.getColor( "Button.disabledSelectedBorderColor" );
+	/** @since 3.5 */ @Styleable protected Color focusedSelectedBorderColor = UIManager.getColor( "Button.focusedSelectedBorderColor" );
+	/** @since 3.5 */ @Styleable protected Color hoverSelectedBorderColor = UIManager.getColor( "Button.hoverSelectedBorderColor" );
+	/** @since 3.5 */ @Styleable protected Color pressedSelectedBorderColor = UIManager.getColor( "Button.pressedSelectedBorderColor" );
 
 	@Styleable(dot=true) protected float defaultBorderWidth = FlatUIUtils.getUIFloat( "Button.default.borderWidth", 1 );
 	@Styleable(dot=true) protected Color defaultBorderColor = FlatUIUtils.getUIColor( "Button.default.startBorderColor", "Button.default.borderColor" );
@@ -72,6 +87,7 @@ public class FlatButtonBorder
 	@Styleable(dot=true) protected Color defaultFocusedBorderColor = UIManager.getColor( "Button.default.focusedBorderColor" );
 	@Styleable(dot=true) protected Color defaultFocusColor = UIManager.getColor( "Button.default.focusColor" );
 	@Styleable(dot=true) protected Color defaultHoverBorderColor = UIManager.getColor( "Button.default.hoverBorderColor" );
+	/** @since 3.5 */ @Styleable(dot=true) protected Color defaultPressedBorderColor = UIManager.getColor( "Button.default.pressedBorderColor" );
 
 	/** @since 1.4 */ @Styleable(dot=true) protected float toolbarFocusWidth = FlatUIUtils.getUIFloat( "Button.toolbar.focusWidth", 1.5f );
 	/** @since 1.4 */ @Styleable(dot=true) protected Color toolbarFocusColor = UIManager.getColor( "Button.toolbar.focusColor" );
@@ -139,12 +155,13 @@ public class FlatButtonBorder
 	@Override
 	protected Paint getBorderColor( Component c ) {
 		boolean def = FlatButtonUI.isDefaultButton( c );
+		boolean selected = (c instanceof AbstractButton && ((AbstractButton)c).isSelected());
 		Paint color = FlatButtonUI.buttonStateColor( c,
-			def ? defaultBorderColor : borderColor,
+			def ? defaultBorderColor : ((selected && selectedBorderColor != null) ? selectedBorderColor : borderColor),
-			disabledBorderColor,
+			(selected && disabledSelectedBorderColor != null) ? disabledSelectedBorderColor : disabledBorderColor,
-			def ? defaultFocusedBorderColor : focusedBorderColor,
+			def ? defaultFocusedBorderColor : ((selected && focusedSelectedBorderColor != null) ? focusedSelectedBorderColor : focusedBorderColor),
-			def ? defaultHoverBorderColor : hoverBorderColor,
+			def ? defaultHoverBorderColor : ((selected && hoverSelectedBorderColor != null) ? hoverSelectedBorderColor : hoverBorderColor),
-			null );
+			def ? defaultPressedBorderColor : ((selected && pressedSelectedBorderColor != null) ? pressedSelectedBorderColor : pressedBorderColor) );
 
 		// change to gradient paint if start/end colors are specified
 		Color startBg = def ? defaultBorderColor : borderColor;

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatButtonUI.java

@@ -29,6 +29,7 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Insets;
 import java.awt.Rectangle;
+import java.awt.event.FocusEvent;
 import java.awt.geom.RoundRectangle2D;
 import java.beans.PropertyChangeEvent;
 import java.util.Map;
@@ -61,6 +62,7 @@ import com.formdev.flatlaf.icons.FlatHelpButtonIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -278,8 +280,6 @@ public class FlatButtonUI
 
 		LookAndFeel.installProperty( b, "opaque", false );
 		LookAndFeel.installProperty( b, "iconTextGap", scale( iconTextGap ) );
-
-		MigLayoutVisualPadding.install( b );
 	}
 
 	@Override
@@ -289,10 +289,23 @@ public class FlatButtonUI
 		oldStyleValues = null;
 		borderShared = null;
 
-		MigLayoutVisualPadding.uninstall( b );
 		defaults_initialized = false;
 	}
 
+	@Override
+	protected void installListeners( AbstractButton b ) {
+		super.installListeners( b );
+
+		MigLayoutVisualPadding.install( b );
+	}
+
+	@Override
+	protected void uninstallListeners( AbstractButton b ) {
+		super.uninstallListeners( b );
+
+		MigLayoutVisualPadding.uninstall( b );
+	}
+
 	@Override
 	protected BasicButtonListener createButtonListener( AbstractButton b ) {
 		return new FlatButtonListener( b );
@@ -300,6 +313,10 @@ public class FlatButtonUI
 
 	protected void propertyChange( AbstractButton b, PropertyChangeEvent e ) {
 		switch( e.getPropertyName() ) {
+			case BasicHTML.propertyKey:
+				FlatHTML.updateRendererCSSFontBaseSize( b );
+				break;
+
 			case SQUARE_SIZE:
 			case MINIMUM_WIDTH:
 			case MINIMUM_HEIGHT:
@@ -308,11 +325,11 @@ public class FlatButtonUI
 
 			case BUTTON_TYPE:
 				b.revalidate();
-				b.repaint();
+				HiDPIUtils.repaint( b );
 				break;
 
 			case OUTLINE:
-				b.repaint();
+				HiDPIUtils.repaint( b );
 				break;
 
 			case STYLE:
@@ -324,7 +341,7 @@ public class FlatButtonUI
 				} else
 					installStyle( b );
 				b.revalidate();
-				b.repaint();
+				HiDPIUtils.repaint( b );
 				break;
 		}
 	}
@@ -364,6 +381,12 @@ public class FlatButtonUI
 			return ((FlatHelpButtonIcon)helpButtonIcon).applyStyleProperty( key, value );
 		}
 
+		// update internal values; otherwise isCustomBackground() and isCustomForeground() would return wrong results
+		switch( key ) {
+			case "background":	background = (Color) value; break;
+			case "foreground":	foreground = (Color) value; break;
+		}
+
 		if( "iconTextGap".equals( key ) && value instanceof Integer )
 			value = UIScale.scale( (Integer) value );
 
@@ -583,9 +606,16 @@ public class FlatButtonUI
 		// paint text
 		if( clippedText != null && !clippedText.isEmpty() ) {
 			View view = (View) b.getClientProperty( BasicHTML.propertyKey );
-			if( view != null )
+			if( view != null ) {
+				// update foreground color in HTML view, which is necessary
+				// for selected and pressed states
+				// (only for enabled buttons, because UIManager.getColor("textInactiveText")
+				// is used for disabled components; see: javax.swing.text.GlyphView.paint())
+				if( b.isEnabled() )
+					FlatHTML.updateRendererCSSForeground( view, getForeground( b ) );
+
 				view.paint( g, textR ); // HTML text
-			else
+			} else
 				paintText( g, b, textR, clippedText );
 		}
 
@@ -631,8 +661,6 @@ public class FlatButtonUI
 	}
 
 	public static void paintText( Graphics g, AbstractButton b, Rectangle textRect, String text, Color foreground ) {
-		if(foreground == null)
-			foreground=Color.red;
 		FontMetrics fm = b.getFontMetrics( b.getFont() );
 		int mnemonicIndex = FlatLaf.isShowMnemonics() ? b.getDisplayedMnemonicIndex() : -1;
 
@@ -642,7 +670,8 @@ public class FlatButtonUI
 	}
 
 	protected Color getBackground( JComponent c ) {
-		boolean toolBarButton = isToolBarButton( c ) || isBorderlessButton( c );
+		boolean def = isDefaultButton( c );
+		boolean toolBarButton = !def && (isToolBarButton( c ) || isBorderlessButton( c ));
 
 		// selected state
 		if( ((AbstractButton)c).isSelected() ) {
@@ -670,7 +699,6 @@ public class FlatButtonUI
 				toolbarPressedBackground );
 		}
 
-		boolean def = isDefaultButton( c );
 		return buttonStateColor( c,
 			getBackgroundBase( c, def ),
 			disabledBackground,
@@ -722,7 +750,8 @@ public class FlatButtonUI
 
 	protected Color getForeground( JComponent c ) {
 		Color fg = c.getForeground();
-		boolean toolBarButton = isToolBarButton( c ) || isBorderlessButton( c );
+		boolean def = isDefaultButton( c );
+		boolean toolBarButton = !def && (isToolBarButton( c ) || isBorderlessButton( c ));
 
 		// selected state
 		if( ((AbstractButton)c).isSelected() ) {
@@ -748,7 +777,6 @@ public class FlatButtonUI
 				toolbarPressedForeground );
 		}
 
-		boolean def = isDefaultButton( c );
 		return buttonStateColor( c,
 			getForegroundBase( c, def ),
 			disabledText,
@@ -906,7 +934,7 @@ public class FlatButtonUI
 
 		@Override
 		public void stateChanged( ChangeEvent e ) {
-			super.stateChanged( e );
+			HiDPIUtils.repaint( b );
 
 			// if button is in toolbar, repaint button groups
 			AbstractButton b = (AbstractButton) e.getSource();
@@ -918,5 +946,17 @@ public class FlatButtonUI
 					((FlatToolBarUI)ui).repaintButtonGroup( b );
 			}
 		}
+
+		@Override
+		public void focusGained( FocusEvent e ) {
+			super.focusGained( e );
+			HiDPIUtils.repaint( b );
+		}
+
+		@Override
+		public void focusLost( FocusEvent e ) {
+			super.focusLost( e );
+			HiDPIUtils.repaint( b );
+		}
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatCaret.java

@@ -17,6 +17,7 @@
 package com.formdev.flatlaf.ui;
 
 import static com.formdev.flatlaf.FlatClientProperties.*;
+import java.awt.Container;
 import java.awt.EventQueue;
 import java.awt.Rectangle;
 import java.awt.event.ActionEvent;
@@ -24,7 +25,9 @@ import java.awt.event.FocusEvent;
 import java.awt.event.MouseEvent;
 import javax.swing.Action;
 import javax.swing.ActionMap;
+import javax.swing.JComboBox;
 import javax.swing.JFormattedTextField;
+import javax.swing.JSpinner;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.plaf.UIResource;
@@ -33,6 +36,7 @@ import javax.swing.text.DefaultCaret;
 import javax.swing.text.DefaultEditorKit;
 import javax.swing.text.Document;
 import javax.swing.text.JTextComponent;
+import javax.swing.text.Position;
 import javax.swing.text.Utilities;
 
 /**
@@ -48,12 +52,15 @@ public class FlatCaret
 {
 	private static final String KEY_CARET_INFO = "FlatLaf.internal.caretInfo";
 
+	// selectAllOnFocusPolicy
+	private static final int NEVER = 0, ONCE = 1, ALWAYS = 2;
+
 	private final String selectAllOnFocusPolicy;
 	private final boolean selectAllOnMouseClick;
 
 	private boolean inInstall;
 	private boolean wasFocused;
-	private boolean wasTemporaryLost;
+	private boolean wasFocusTemporaryLost;
 	private boolean isMousePressed;
 	private boolean isWordSelection;
 	private boolean isLineSelection;
@@ -94,6 +101,9 @@ public class FlatCaret
 			// restore selection
 			select( (int) ci[1], (int) ci[0] );
 
+			if( ci[4] != 0 )
+				wasFocused = true;
+
 			// if text component is focused, then caret and selection are visible,
 			// but when switching theme, the component does not yet have
 			// a highlighter and the selection is not painted
@@ -121,6 +131,7 @@ public class FlatCaret
 			getMark(),
 			getBlinkRate(),
 			System.currentTimeMillis(),
+			wasFocused ? 1 : 0,
 		} );
 
 		super.deinstall( c );
@@ -140,11 +151,36 @@ public class FlatCaret
 		super.adjustVisibility( nloc );
 	}
 
+	@Override
+	public void setDot( int dot ) {
+		super.setDot( dot );
+
+		// mark as focused if invoked from JTextComponent.setCaretPosition()
+		// to disable SELECT_ALL_ON_FOCUS_POLICY_ONCE if application explicitly changes selection
+		if( !wasFocused &&
+			getSelectAllOnFocusPolicy() == ONCE &&
+			StackUtils.wasInvokedFrom( JTextComponent.class.getName(), "setCaretPosition", 6 ) )
+		  wasFocused = true;
+	}
+
+	@Override
+	public void moveDot( int dot ) {
+		super.moveDot( dot );
+
+		// mark as focused if invoked from JTextComponent.moveCaretPosition()
+		// to disable SELECT_ALL_ON_FOCUS_POLICY_ONCE if application explicitly changes selection
+		if( !wasFocused &&
+			getSelectAllOnFocusPolicy() == ONCE &&
+			StackUtils.wasInvokedFrom( JTextComponent.class.getName(), "moveCaretPosition", 6 ) )
+		  wasFocused = true;
+	}
+
 	@Override
 	public void focusGained( FocusEvent e ) {
-		if( !inInstall && !wasTemporaryLost && (!isMousePressed || selectAllOnMouseClick) )
+		if( !inInstall && !wasFocusTemporaryLost && (!isMousePressed || isSelectAllOnMouseClick()) )
 			selectAllOnFocusGained();
-		wasTemporaryLost = false;
+
+		wasFocusTemporaryLost = false;
 		wasFocused = true;
 
 		super.focusGained( e );
@@ -152,7 +188,7 @@ public class FlatCaret
 
 	@Override
 	public void focusLost( FocusEvent e ) {
-		wasTemporaryLost = e.isTemporary();
+		wasFocusTemporaryLost = e.isTemporary();
 		super.focusLost( e );
 	}
 
@@ -232,24 +268,13 @@ public class FlatCaret
 		if( doc == null || !c.isEnabled() || !c.isEditable() || FlatUIUtils.isCellEditor( c ) )
 			return;
 
-		Object selectAllOnFocusPolicy = c.getClientProperty( SELECT_ALL_ON_FOCUS_POLICY );
+		int selectAllOnFocusPolicy = getSelectAllOnFocusPolicy();
-		if( selectAllOnFocusPolicy == null )
+		if( selectAllOnFocusPolicy == NEVER )
-			selectAllOnFocusPolicy = this.selectAllOnFocusPolicy;
-
-		if( selectAllOnFocusPolicy == null || SELECT_ALL_ON_FOCUS_POLICY_NEVER.equals( selectAllOnFocusPolicy ) )
 			return;
 
-		if( !SELECT_ALL_ON_FOCUS_POLICY_ALWAYS.equals( selectAllOnFocusPolicy ) ) {
+		if( selectAllOnFocusPolicy == ONCE && !isMousePressed ) {
-			// policy is "once" (or null or unknown)
-
 			// was already focused?
-			if( wasFocused )
+			if( wasFocused && !(c instanceof JFormattedTextField) )
-				return;
-
-			// check whether selection was modified before gaining focus
-			int dot = getDot();
-			int mark = getMark();
-			if( dot != mark || dot != doc.getLength() )
 				return;
 		}
 
@@ -265,16 +290,51 @@ public class FlatCaret
 
 				select( 0, c2.getDocument().getLength() );
 			} );
-		} else {
+		} else
 			select( 0, doc.getLength() );
-		}
 	}
 
 	private void select( int mark, int dot ) {
 		if( mark != getMark() )
-			setDot( mark );
+			setDot( mark, Position.Bias.Forward );
 		if( dot != getDot() )
-			moveDot( dot );
+			moveDot( dot, Position.Bias.Forward );
+	}
+
+	private int getSelectAllOnFocusPolicy() {
+		Object value = getClientProperty( SELECT_ALL_ON_FOCUS_POLICY );
+		// Note: using String.valueOf() because selectAllOnFocusPolicy may be null
+		switch( String.valueOf( value instanceof String ? value : selectAllOnFocusPolicy ) ) {
+			default:
+			case SELECT_ALL_ON_FOCUS_POLICY_NEVER:  return NEVER;
+			case SELECT_ALL_ON_FOCUS_POLICY_ONCE:   return ONCE;
+			case SELECT_ALL_ON_FOCUS_POLICY_ALWAYS: return ALWAYS;
+		}
+	}
+
+	private boolean isSelectAllOnMouseClick() {
+		Object value = getClientProperty( SELECT_ALL_ON_MOUSE_CLICK );
+		return (value instanceof Boolean) ? (boolean) value : selectAllOnMouseClick;
+	}
+
+	private Object getClientProperty( String key ) {
+		JTextComponent c = getComponent();
+		if( c == null )
+			return null;
+
+		Object value = c.getClientProperty( key );
+		if( value != null )
+			return value;
+
+		Container parent = c.getParent();
+		if( parent instanceof JComboBox )
+			return ((JComboBox<?>)parent).getClientProperty( key );
+		if( parent instanceof JSpinner.DefaultEditor ) {
+			parent = parent.getParent();
+			if( parent instanceof JSpinner )
+				return ((JSpinner)parent).getClientProperty( key );
+		}
+		return null;
 	}
 
 	/** @since 1.4 */

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatCheckBoxMenuItemUI.java

@@ -23,6 +23,7 @@ import java.lang.invoke.MethodHandles;
 import java.util.Map;
 import javax.swing.Icon;
 import javax.swing.JComponent;
+import javax.swing.JMenuItem;
 import javax.swing.LookAndFeel;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicCheckBoxMenuItemUI;
@@ -102,13 +103,23 @@ public class FlatCheckBoxMenuItemUI
 		oldStyleValues = null;
 	}
 
+	@Override
+	protected void installComponents( JMenuItem menuItem ) {
+		super.installComponents( menuItem );
+
+		// update HTML renderer if necessary
+		FlatHTML.updateRendererCSSFontBaseSize( menuItem );
+	}
+
 	protected FlatMenuItemRenderer createRenderer() {
 		return new FlatMenuItemRenderer( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
 	}
 
 	@Override
 	protected PropertyChangeListener createPropertyChangeListener( JComponent c ) {
-		return FlatStylingSupport.createPropertyChangeListener( c, this::installStyle, super.createPropertyChangeListener( c ) );
+		return FlatHTML.createPropertyChangeListener(
+			FlatStylingSupport.createPropertyChangeListener( c, this::installStyle,
+				super.createPropertyChangeListener( c ) ) );
 	}
 
 	/** @since 2 */

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatComboBoxUI.java

@@ -78,6 +78,7 @@ import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableLookupProvider;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.SystemInfo;
 
@@ -220,10 +221,12 @@ public class FlatComboBoxUI
 
 			private void repaintArrowButton() {
 				if( arrowButton != null && !comboBox.isEditable() )
-					arrowButton.repaint();
+					HiDPIUtils.repaint( arrowButton );
 			}
 		};
 		comboBox.addMouseListener( hoverListener );
+
+		MigLayoutVisualPadding.install( comboBox );
 	}
 
 	@Override
@@ -232,6 +235,8 @@ public class FlatComboBoxUI
 
 		comboBox.removeMouseListener( hoverListener );
 		hoverListener = null;
+
+		MigLayoutVisualPadding.uninstall( comboBox );
 	}
 
 	@Override
@@ -273,8 +278,6 @@ public class FlatComboBoxUI
 			comboBox.setMaximumRowCount( maximumRowCount );
 
 		paddingBorder = new CellPaddingBorder( padding );
-
-		MigLayoutVisualPadding.install( comboBox );
 	}
 
 	@Override
@@ -303,8 +306,6 @@ public class FlatComboBoxUI
 
 		oldStyleValues = null;
 		borderShared = null;
-
-		MigLayoutVisualPadding.uninstall( comboBox );
 	}
 
 	@Override
@@ -351,15 +352,15 @@ public class FlatComboBoxUI
 			@Override
 			public void focusGained( FocusEvent e ) {
 				super.focusGained( e );
-				if( comboBox != null && comboBox.isEditable() )
+				if( comboBox != null )
-					comboBox.repaint();
+					HiDPIUtils.repaint( comboBox );
 			}
 
 			@Override
 			public void focusLost( FocusEvent e ) {
 				super.focusLost( e );
-				if( comboBox != null && comboBox.isEditable() )
+				if( comboBox != null )
-					comboBox.repaint();
+					HiDPIUtils.repaint( comboBox );
 			}
 		};
 	}
@@ -386,12 +387,12 @@ public class FlatComboBoxUI
 				switch( propertyName ) {
 					case PLACEHOLDER_TEXT:
 						if( editor != null )
-							editor.repaint();
+							HiDPIUtils.repaint( editor );
 						break;
 
 					case COMPONENT_ROUND_RECT:
 					case OUTLINE:
-						comboBox.repaint();
+						HiDPIUtils.repaint( comboBox );
 						break;
 
 					case MINIMUM_WIDTH:
@@ -402,7 +403,7 @@ public class FlatComboBoxUI
 					case STYLE_CLASS:
 						installStyle();
 						comboBox.revalidate();
-						comboBox.repaint();
+						HiDPIUtils.repaint( comboBox );
 						break;
 				}
 			}
@@ -584,7 +585,7 @@ public class FlatComboBoxUI
 			FlatUIUtils.paintComponentBackground( g2, 0, 0, width, height, focusWidth, arc );
 
 			// paint arrow button background
-			if( enabled && !isCellRenderer ) {
+			if( enabled && !isCellRenderer && arrowButton.isVisible() ) {
 				Color buttonColor = paintButton
 					? buttonEditableBackground
 					: (buttonFocusedBackground != null || focusedBackground != null) && isPermanentFocusOwner( comboBox )
@@ -611,7 +612,7 @@ public class FlatComboBoxUI
 			}
 
 			// paint vertical line between value and arrow button
-			if( paintButton ) {
+			if( paintButton && arrowButton.isVisible() ) {
 				Color separatorColor = enabled ? buttonSeparatorColor : buttonDisabledSeparatorColor;
 				if( separatorColor != null && buttonSeparatorWidth > 0 ) {
 					g2.setColor( separatorColor );
@@ -881,7 +882,7 @@ public class FlatComboBoxUI
 				GraphicsConfiguration gc = comboBox.getGraphicsConfiguration();
 				if( gc != null ) {
 					Rectangle screenBounds = gc.getBounds();
-					Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets( gc );
+					Insets screenInsets = FlatUIUtils.getScreenInsets( gc );
 					displayWidth = Math.min( displayWidth, screenBounds.width - screenInsets.left - screenInsets.right );
 				} else {
 					Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatDropShadowBorder.java

@@ -74,7 +74,7 @@ public class FlatDropShadowBorder
 
 		this.shadowColor = shadowColor;
 		this.shadowInsets = shadowInsets;
-		this.shadowOpacity = shadowOpacity;
+		this.shadowOpacity = Math.min( Math.max( shadowOpacity, 0f ), 1f );
 
 		shadowSize = maxInset( shadowInsets );
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatEditorPaneUI.java

@@ -171,7 +171,7 @@ public class FlatEditorPaneUI
 			case FlatClientProperties.STYLE_CLASS:
 				installStyle.run();
 				c.revalidate();
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 		}
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatFileChooserUI.java

@@ -24,6 +24,7 @@ import java.awt.Graphics2D;
 import java.awt.Image;
 import java.awt.Insets;
 import java.awt.LayoutManager;
+import java.awt.Rectangle;
 import java.awt.RenderingHints;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
@@ -32,6 +33,7 @@ import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.function.Function;
 import javax.swing.AbstractButton;
+import javax.swing.BorderFactory;
 import javax.swing.Box;
 import javax.swing.BoxLayout;
 import javax.swing.ButtonGroup;
@@ -46,6 +48,7 @@ import javax.swing.JScrollPane;
 import javax.swing.JTable;
 import javax.swing.JToggleButton;
 import javax.swing.JToolBar;
+import javax.swing.Scrollable;
 import javax.swing.SwingConstants;
 import javax.swing.UIManager;
 import javax.swing.filechooser.FileSystemView;
@@ -164,6 +167,7 @@ public class FlatFileChooserUI
 {
 	private final FlatFileView fileView = new FlatFileView();
 	private FlatShortcutsPanel shortcutsPanel;
+	private JScrollPane shortcutsScrollPane;
 
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatFileChooserUI( (JFileChooser) c );
@@ -183,7 +187,10 @@ public class FlatFileChooserUI
 			FlatShortcutsPanel panel = createShortcutsPanel( fc );
 			if( panel.getComponentCount() > 0 ) {
 				shortcutsPanel = panel;
-				fc.add( shortcutsPanel, BorderLayout.LINE_START );
+				shortcutsScrollPane = new JScrollPane( shortcutsPanel,
+					JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER );
+				shortcutsScrollPane.setBorder( BorderFactory.createEmptyBorder() );
+				fc.add( shortcutsScrollPane, BorderLayout.LINE_START );
 				fc.addPropertyChangeListener( shortcutsPanel );
 			}
 		}
@@ -196,6 +203,7 @@ public class FlatFileChooserUI
 		if( shortcutsPanel != null ) {
 			fc.removePropertyChangeListener( shortcutsPanel );
 			shortcutsPanel = null;
+			shortcutsScrollPane = null;
 		}
 	}
 
@@ -324,7 +332,7 @@ public class FlatFileChooserUI
 	public Dimension getPreferredSize( JComponent c ) {
 		Dimension prefSize = super.getPreferredSize( c );
 		Dimension minSize = getMinimumSize( c );
-		int shortcutsPanelWidth = (shortcutsPanel != null) ? shortcutsPanel.getPreferredSize().width : 0;
+		int shortcutsPanelWidth = (shortcutsScrollPane != null) ? shortcutsScrollPane.getPreferredSize().width : 0;
 		return new Dimension(
 			Math.max( prefSize.width, minSize.width + shortcutsPanelWidth ),
 			Math.max( prefSize.height, minSize.height ) );
@@ -368,31 +376,68 @@ public class FlatFileChooserUI
 			if( icon != null )
 				return icon;
 
-			// get system icon
+			// new proxy icon
-			if( f != null ) {
+			//
-				try {
+			// Note: Since this is a super light weight icon object, we do not add it
-					icon = getFileChooser().getFileSystemView().getSystemIcon( f );
+			//       to the icon cache here. This keeps cache small in case of large directories
-				} catch( NullPointerException ex ) {
+			//       with thousands of files when icons of all files are only needed to compute
-					// Java 21 may throw a NPE for exe files that use default Windows exe icon
+			//       the layout of list/table, but never painted because located outside of visible area.
-				}
+			//       When an icon needs to be painted, the proxy adds it to the icon cache
+			//       and loads the real icon.
+			return new FlatFileViewIcon( f );
+		}
 
-				if( icon != null ) {
+		//---- class FlatFileViewIcon -----------------------------------------
-					if( icon instanceof ImageIcon )
+
-						icon = new ScaledImageIcon( (ImageIcon) icon );
+		/**
-					cacheIcon( f, icon );
+		 * A proxy icon that has a fixed (scaled) width/height (16x16) and
-					return icon;
+		 * gets/loads the real (system) icon only for painting.
-				}
+		 * Avoids unnecessary getting/loading system icons.
+		 */
+		private class FlatFileViewIcon
+			implements Icon
+		{
+			private final File f;
+			private Icon realIcon;
+
+			FlatFileViewIcon( File f ) {
+				this.f = f;
 			}
 
-			// get default icon
+			@Override
-			icon = super.getIcon( f );
+			public int getIconWidth() {
-
+				return UIScale.scale( 16 );
-			if( icon instanceof ImageIcon ) {
-				icon = new ScaledImageIcon( (ImageIcon) icon );
-				cacheIcon( f, icon );
 			}
 
-			return icon;
+			@Override
+			public int getIconHeight() {
+				return UIScale.scale( 16 );
+			}
+
+			@Override
+			public void paintIcon( Component c, Graphics g, int x, int y ) {
+				// get icon on demand
+				if( realIcon == null ) {
+					// get system icon
+					try {
+						if( f != null )
+							realIcon = getFileChooser().getFileSystemView().getSystemIcon( f );
+					} catch( NullPointerException ex ) {
+						// Java 21 may throw a NPE for exe files that use default Windows exe icon
+					}
+
+					// get default icon
+					if( realIcon == null )
+						realIcon = FlatFileView.super.getIcon( f );
+
+					if( realIcon instanceof ImageIcon )
+						realIcon = new ScaledImageIcon( (ImageIcon) realIcon );
+
+					cacheIcon( f, this );
+				}
+
+				realIcon.paintIcon( c, g, x, y );
+			}
 		}
 	}
 
@@ -401,7 +446,7 @@ public class FlatFileChooserUI
 	/** @since 2.3 */
 	public static class FlatShortcutsPanel
 		extends JToolBar
-		implements PropertyChangeListener
+		implements PropertyChangeListener, Scrollable
 	{
 		private final JFileChooser fc;
 
@@ -420,6 +465,7 @@ public class FlatFileChooserUI
 			super( JToolBar.VERTICAL );
 			this.fc = fc;
 			setFloatable( false );
+			putClientProperty( FlatClientProperties.STYLE, "hoverButtonGroupBackground: null" );
 
 			buttonSize = UIScale.scale( getUIDimension( "FileChooser.shortcuts.buttonSize", 84, 64 ) );
 			iconSize = getUIDimension( "FileChooser.shortcuts.iconSize", 32, 32 );
@@ -461,7 +507,7 @@ public class FlatFileChooserUI
 					icon = new ShortcutIcon( icon, iconSize.width, iconSize.height );
 
 				// create button
-				JToggleButton button = createButton( name, icon );
+				JToggleButton button = createButton( name, icon, file.toString() );
 				File f = file;
 				button.addActionListener( e -> {
 					fc.setCurrentDirectory( f );
@@ -487,8 +533,10 @@ public class FlatFileChooserUI
 			return size;
 		}
 
-		protected JToggleButton createButton( String name, Icon icon ) {
+		/** @since 3.5 */
+		protected JToggleButton createButton( String name, Icon icon, String toolTip ) {
 			JToggleButton button = new JToggleButton( name, icon );
+			button.setToolTipText( toolTip );
 			button.setVerticalTextPosition( SwingConstants.BOTTOM );
 			button.setHorizontalTextPosition( SwingConstants.CENTER );
 			button.setAlignmentX( Component.CENTER_ALIGNMENT );
@@ -566,6 +614,8 @@ public class FlatFileChooserUI
 			buttonGroup.clearSelection();
 		}
 
+		//---- interface PropertyChangeListener ----
+
 		@Override
 		public void propertyChange( PropertyChangeEvent e ) {
 			switch( e.getPropertyName() ) {
@@ -574,6 +624,41 @@ public class FlatFileChooserUI
 					break;
 			}
 		}
+
+		//---- interface Scrollable ----
+
+		@Override
+		public Dimension getPreferredScrollableViewportSize() {
+			if( getComponentCount() > 0 ) {
+				Insets insets = getInsets();
+				int height = (getComponent( 0 ).getPreferredSize().height * 5) + insets.top + insets.bottom;
+				return new Dimension( getPreferredSize().width, height );
+			}
+			return getPreferredSize();
+		}
+
+		@Override
+		public int getScrollableUnitIncrement( Rectangle visibleRect, int orientation, int direction ) {
+			if( orientation == SwingConstants.VERTICAL && getComponentCount() > 0 )
+				return getComponent( 0 ).getPreferredSize().height;
+
+			return getScrollableBlockIncrement( visibleRect, orientation, direction ) / 10;
+		}
+
+		@Override
+		public int getScrollableBlockIncrement( Rectangle visibleRect, int orientation, int direction ) {
+			return (orientation == SwingConstants.VERTICAL) ? visibleRect.height : visibleRect.width;
+		}
+
+		@Override
+		public boolean getScrollableTracksViewportWidth() {
+			return true;
+		}
+
+		@Override
+		public boolean getScrollableTracksViewportHeight() {
+			return false;
+		}
 	}
 
 	//---- class ShortcutIcon -------------------------------------------------

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatHTML.java

@@ -0,0 +1,290 @@
+/*
+ * Copyright 2024 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import java.awt.Color;
+import java.awt.Font;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.function.BiConsumer;
+import javax.swing.AbstractButton;
+import javax.swing.JComponent;
+import javax.swing.JLabel;
+import javax.swing.JToolTip;
+import javax.swing.plaf.basic.BasicHTML;
+import javax.swing.text.AttributeSet;
+import javax.swing.text.Document;
+import javax.swing.text.LabelView;
+import javax.swing.text.Style;
+import javax.swing.text.StyleConstants;
+import javax.swing.text.View;
+import javax.swing.text.html.CSS;
+import javax.swing.text.html.HTMLDocument;
+import javax.swing.text.html.StyleSheet;
+
+/**
+ * @author Karl Tauber
+ * @since 3.5
+ */
+public class FlatHTML
+{
+	private FlatHTML() {}
+
+	/**
+	 * Adds CSS rule BASE_SIZE to the style sheet of the HTML view,
+	 * which re-calculates font sizes based on current component font size.
+	 * This is necessary for "absolute-size" keywords (e.g. "x-large")
+	 * for "font-size" attributes in default style sheet (see javax/swing/text/html/default.css).
+	 * See also <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/font-size#values">CSS font-size</a>.
+	 * <p>
+	 * This method should be invoked after {@link BasicHTML#updateRenderer(JComponent, String)}.
+	 */
+	public static void updateRendererCSSFontBaseSize( JComponent c ) {
+		View view = (View) c.getClientProperty( BasicHTML.propertyKey );
+		if( view == null )
+			return;
+
+//		dumpViews( view, 0 );
+
+		Document doc = view.getDocument();
+		if( !(doc instanceof HTMLDocument) )
+			return;
+
+		// add BASE_SIZE rule if necessary
+		//  - if point size at index 7 is not 36, then probably HTML text contains BASE_SIZE rule
+		//  - if point size at index 4 is equal to given font size, then it is not necessary to add BASE_SIZE rule
+		StyleSheet styleSheet = ((HTMLDocument)doc).getStyleSheet();
+/*debug
+		for( int i = 1; i <= 7; i++ )
+			System.out.println( i+": "+ styleSheet.getPointSize( i ) );
+debug*/
+		Font font = c.getFont();
+		if( styleSheet.getPointSize( 7 ) != 36f ||
+			font == null || styleSheet.getPointSize( 4 ) == font.getSize() )
+		  return;
+
+		// check whether view uses "absolute-size" keywords (e.g. "x-large") for font-size
+		if( !usesAbsoluteSizeKeywordForFontSize( view ) )
+			return;
+
+		// get HTML text from component
+		String text;
+		if( c instanceof JLabel )
+			text = ((JLabel)c).getText();
+		else if( c instanceof AbstractButton )
+			text = ((AbstractButton)c).getText();
+		else if( c instanceof JToolTip )
+			text = ((JToolTip)c).getTipText();
+		else
+			return;
+		if( text == null || !BasicHTML.isHTMLString( text ) )
+			return;
+
+		// BASE_SIZE rule is parsed in javax.swing.text.html.StyleSheet.addRule()
+		String style = "<style>BASE_SIZE " + font.getSize() + "</style>";
+		String openTag = "";
+		String closeTag = "";
+
+		int headIndex;
+		int styleIndex;
+
+		int insertIndex;
+		if( (headIndex = indexOfTag( text, "head", true )) >= 0 ) {
+			// there is a <head> tag --> insert after <head> tag
+			insertIndex = headIndex;
+		} else if( (styleIndex = indexOfTag( text, "style", false )) >= 0 ) {
+			// there is a <style> tag --> insert before <style> tag
+			insertIndex = styleIndex;
+		} else {
+			// no <head> or <style> tag --> insert <head> tag after <html> tag
+			insertIndex = "<html>".length();
+			openTag = "<head>";
+			closeTag = "</head>";
+		}
+
+		String newText = text.substring( 0, insertIndex )
+			+ openTag + style + closeTag
+			+ text.substring( insertIndex );
+
+		BasicHTML.updateRenderer( c, newText );
+
+		// for unit tests
+		if( testUpdateRenderer != null )
+			testUpdateRenderer.accept( c, newText );
+	}
+
+	// for unit tests
+	static BiConsumer<JComponent, String> testUpdateRenderer;
+
+	/**
+	 * Returns start or end index of a HTML tag.
+	 * Checks only for leading '<' character and (case-ignore) tag name.
+	 */
+	private static int indexOfTag( String html, String tag, boolean endIndex ) {
+		int tagLength = tag.length();
+		int maxLength = html.length() - tagLength - 2;
+		char lastTagChar = tag.charAt( tagLength - 1 );
+
+		for( int i = "<html>".length(); i < maxLength; i++ ) {
+			// check for leading '<' and last tag name character
+			if( html.charAt( i ) == '<' && Character.toLowerCase( html.charAt( i + tagLength ) ) == lastTagChar ) {
+				// compare tag characters from last to first
+				for( int j = tagLength - 2; j >= 0; j-- ) {
+					if( Character.toLowerCase( html.charAt( i + 1 + j ) ) != tag.charAt( j ) )
+						break; // not equal
+
+					if( j == 0 ) {
+						// tag found
+						return endIndex ? html.indexOf( '>', i + tagLength ) + 1 : i;
+					}
+				}
+			}
+		}
+
+		return -1;
+	}
+
+	private static final Set<String> absoluteSizeKeywordsSet = new HashSet<>( Arrays.asList(
+		"xx-small", "x-small", "small", "medium", "large", "x-large", "xx-large" ) );
+
+	/**
+	 * Checks whether view uses "absolute-size" keywords (e.g. "x-large") for font-size
+	 * (see javax/swing/text/html/default.css).
+	 */
+	private static boolean usesAbsoluteSizeKeywordForFontSize( View view ) {
+		AttributeSet attributes = view.getAttributes();
+		if( attributes != null ) {
+			Object fontSize = attributes.getAttribute( CSS.Attribute.FONT_SIZE );
+			if( fontSize != null ) {
+				if( absoluteSizeKeywordsSet.contains( fontSize.toString() ) )
+					return true;
+			}
+		}
+
+		int viewCount = view.getViewCount();
+		for( int i = 0; i < viewCount; i++ ) {
+			if( usesAbsoluteSizeKeywordForFontSize( view.getView( i ) ) )
+				return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Updates foreground in style sheet of the HTML view.
+	 * Adds "body { color: #&lt;foreground-hex&gt;; }"
+	 */
+	public static void updateRendererCSSForeground( View view, Color foreground ) {
+		Document doc = view.getDocument();
+		if( !(doc instanceof HTMLDocument) || foreground == null )
+			return;
+
+		// add foreground rule if necessary
+		//  - use tag 'body' because BasicHTML.createHTMLView() also uses this tag
+		//    to set font and color styles to component font/color
+		//    see: SwingUtilities2.displayPropertiesToCSS()
+		//  - this color is not used if component is disabled;
+		//    JTextComponent.getDisabledTextColor() is used for disabled text components;
+		//    UIManager.getColor("textInactiveText") is used for other disabled components
+		//    see: javax.swing.text.GlyphView.paint()
+		Style bodyStyle = ((HTMLDocument)doc).getStyle( "body" );
+		if( bodyStyle == null ) {
+			StyleSheet styleSheet = ((HTMLDocument)doc).getStyleSheet();
+			styleSheet.addRule( String.format( "body { color: #%06x; }", foreground.getRGB() & 0xffffff ) );
+			clearViewCaches( view );
+		} else if( !foreground.equals( bodyStyle.getAttribute( StyleConstants.Foreground ) ) ) {
+			bodyStyle.addAttribute( StyleConstants.Foreground, foreground );
+			clearViewCaches( view );
+		}
+	}
+
+	/**
+	 * Clears cached values in view so that CSS changes take effect.
+	 */
+	private static void clearViewCaches( View view ) {
+		if( view instanceof LabelView )
+			((LabelView)view).changedUpdate( null, null, null );
+
+		int viewCount = view.getViewCount();
+		for( int i = 0; i < viewCount; i++ )
+			clearViewCaches( view.getView( i ) );
+	}
+
+	public static PropertyChangeListener createPropertyChangeListener( PropertyChangeListener superListener ) {
+		return e -> {
+			if( superListener != null )
+				superListener.propertyChange( e );
+			propertyChange( e );
+		};
+	}
+
+	/**
+	 * Invokes {@link #updateRendererCSSFontBaseSize(JComponent)}
+	 * for {@link BasicHTML#propertyKey} property change events,
+	 * which are fired when {@link BasicHTML#updateRenderer(JComponent, String)}
+	 * updates the HTML view.
+	 */
+	public static void propertyChange( PropertyChangeEvent e ) {
+		if( BasicHTML.propertyKey.equals( e.getPropertyName() ) && e.getNewValue() instanceof View )
+			updateRendererCSSFontBaseSize( (JComponent) e.getSource() );
+	}
+
+/*debug
+	public static void dumpView( JComponent c ) {
+		View view = (View) c.getClientProperty( BasicHTML.propertyKey );
+		if( view != null )
+			dumpViews( view, 0 );
+	}
+
+	public static void dumpViews( View view, int indent ) {
+		for( int i = 0; i < indent; i++ )
+			System.out.print( "    " );
+
+		System.out.printf( "%s @%-8x   %3d,%2d",
+			view.getClass().isAnonymousClass() ? view.getClass().getName() : view.getClass().getSimpleName(),
+			System.identityHashCode( view ),
+			(int) view.getPreferredSpan( View.X_AXIS ),
+			(int) view.getPreferredSpan( View.Y_AXIS ) );
+
+		AttributeSet attrs = view.getAttributes();
+		if( attrs != null ) {
+			Object fontSize = attrs.getAttribute( CSS.Attribute.FONT_SIZE );
+			System.out.printf( "  %-8s", fontSize );
+		}
+
+		if( view instanceof javax.swing.text.GlyphView ) {
+			javax.swing.text.GlyphView gview = ((javax.swing.text.GlyphView)view);
+			java.awt.Font font = gview.getFont();
+			System.out.printf( "   %3d-%-3d  %s %2d (@%x)  #%06x  '%s'",
+				gview.getStartOffset(), gview.getEndOffset() - 1,
+				font.getName(), font.getSize(), System.identityHashCode( font ),
+				gview.getForeground().getRGB() & 0xffffff,
+				gview.getText( gview.getStartOffset(), gview.getEndOffset() ) );
+		}
+		System.out.println();
+
+		int viewCount = view.getViewCount();
+		for( int i = 0; i < viewCount; i++ ) {
+			View child = view.getView( i );
+			dumpViews( child, indent + 1 );
+		}
+	}
+debug*/
+}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatLabelUI.java

@@ -22,11 +22,7 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Rectangle;
 import java.beans.PropertyChangeEvent;
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.Locale;
 import java.util.Map;
-import java.util.Set;
 import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.JLabel;
@@ -64,6 +60,9 @@ public class FlatLabelUI
 {
 	@Styleable protected Color disabledForeground;
 
+	// only used via styling (not in UI defaults)
+	/** @since 3.5 */ @Styleable protected int arc = -1;
+
 	private final boolean shared;
 	private boolean defaults_initialized = false;
 	private Map<String, Object> oldStyleValues;
@@ -110,16 +109,13 @@ public class FlatLabelUI
 		super.installComponents( c );
 
 		// update HTML renderer if necessary
-		updateHTMLRenderer( c, c.getText(), false );
+		FlatHTML.updateRendererCSSFontBaseSize( c );
 	}
 
 	@Override
 	public void propertyChange( PropertyChangeEvent e ) {
 		String name = e.getPropertyName();
-		if( name == "text" || name == "font" || name == "foreground" ) {
+		if( name.equals( FlatClientProperties.STYLE ) || name.equals( FlatClientProperties.STYLE_CLASS ) ) {
-			JLabel label = (JLabel) e.getSource();
-			updateHTMLRenderer( label, label.getText(), true );
-		} else if( name.equals( FlatClientProperties.STYLE ) || name.equals( FlatClientProperties.STYLE_CLASS ) ) {
 			JLabel label = (JLabel) e.getSource();
 			if( shared && FlatStylingSupport.hasStyleProperty( label ) ) {
 				// unshare component UI if necessary
@@ -128,9 +124,11 @@ public class FlatLabelUI
 			} else
 				installStyle( label );
 			label.revalidate();
-			label.repaint();
+			HiDPIUtils.repaint( label );
-		} else
+		}
-			super.propertyChange( e );
+
+		super.propertyChange( e );
+		FlatHTML.propertyChange( e );
 	}
 
 	/** @since 2 */
@@ -165,83 +163,10 @@ public class FlatLabelUI
 		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
 	}
 
-	/**
+	@Override
-	 * Checks whether text contains HTML tags that use "absolute-size" keywords
+	public void update( Graphics g, JComponent c ) {
-	 * (e.g. "x-large") for font-size in default style sheet
+		FlatPanelUI.fillRoundedBackground( g, c, arc );
-	 * (see javax/swing/text/html/default.css).
+		paint( g, c );
-	 * If yes, adds a special CSS rule (BASE_SIZE) to the HTML text, which
-	 * re-calculates font sizes based on current component font size.
-	 */
-	static void updateHTMLRenderer( JComponent c, String text, boolean always ) {
-		if( BasicHTML.isHTMLString( text ) &&
-			c.getClientProperty( "html.disable" ) != Boolean.TRUE &&
-			needsFontBaseSize( text ) )
-		{
-			// BASE_SIZE rule is parsed in javax.swing.text.html.StyleSheet.addRule()
-			String style = "<style>BASE_SIZE " + c.getFont().getSize() + "</style>";
-
-			String lowerText = text.toLowerCase( Locale.ENGLISH );
-			int headIndex;
-			int styleIndex;
-
-			int insertIndex;
-			if( (headIndex = lowerText.indexOf( "<head>" )) >= 0 ) {
-				// there is a <head> tag --> insert after <head> tag
-				insertIndex = headIndex + "<head>".length();
-			} else if( (styleIndex = lowerText.indexOf( "<style>" )) >= 0 ) {
-				// there is a <style> tag --> insert before <style> tag
-				insertIndex = styleIndex;
-			} else {
-				// no <head> or <style> tag --> insert <head> tag after <html> tag
-				style = "<head>" + style + "</head>";
-				insertIndex = "<html>".length();
-			}
-
-			text = text.substring( 0, insertIndex )
-				+ style
-				+ text.substring( insertIndex );
-		} else if( !always )
-			return; // not necessary to invoke BasicHTML.updateRenderer()
-
-		BasicHTML.updateRenderer( c, text );
-	}
-
-	private static Set<String> tagsUseFontSizeSet;
-
-	private static boolean needsFontBaseSize( String text ) {
-		if( tagsUseFontSizeSet == null ) {
-			// tags that use font-size in javax/swing/text/html/default.css
-			tagsUseFontSizeSet = new HashSet<>( Arrays.asList(
-				"h1", "h2", "h3", "h4", "h5", "h6", "code", "kbd", "big", "small", "samp" ) );
-		}
-
-		// search for tags in HTML text
-		int textLength = text.length();
-		for( int i = 6; i < textLength - 1; i++ ) {
-			if( text.charAt( i ) == '<' ) {
-				switch( text.charAt( i + 1 ) ) {
-					// first letters of tags in tagsUseFontSizeSet
-					case 'b': case 'B':
-					case 'c': case 'C':
-					case 'h': case 'H':
-					case 'k': case 'K':
-					case 's': case 'S':
-						int tagBegin = i + 1;
-						for( i += 2; i < textLength; i++ ) {
-							if( !Character.isLetterOrDigit( text.charAt( i ) ) ) {
-								String tag = text.substring( tagBegin, i ).toLowerCase( Locale.ENGLISH );
-								if( tagsUseFontSizeSet.contains( tag ) )
-									return true;
-
-								break;
-							}
-						}
-						break;
-				}
-			}
-		}
-
-		return false;
 	}
 
 	static Graphics createGraphicsHTMLTextYCorrection( Graphics g, JComponent c ) {

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatLineBorder.java

@@ -23,13 +23,20 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Insets;
 import javax.swing.JComponent;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.plaf.ComponentUI;
 
 /**
  * Line border for various components.
- *
+ * <p>
  * Paints a scaled (usually 1px thick) line around the component.
  * The line thickness is not added to the border insets.
  * The insets should be at least have line thickness (usually 1,1,1,1).
+ * <p>
+ * For {@link javax.swing.JPanel} and {@link javax.swing.JLabel}, this border
+ * can be used paint rounded background (if line color is {@code null}) or
+ * paint rounded line border with rounded background.
  *
  * @author Karl Tauber
  */
@@ -41,7 +48,7 @@ public class FlatLineBorder
 	/** @since 2 */ private final int arc;
 
 	public FlatLineBorder( Insets insets, Color lineColor ) {
-		this( insets, lineColor, 1f, 0 );
+		this( insets, lineColor, 1f, -1 );
 	}
 
 	/** @since 2 */
@@ -52,15 +59,28 @@ public class FlatLineBorder
 		this.arc = arc;
 	}
 
+	/** @since 3.5 */
+	public FlatLineBorder( Insets insets, int arc ) {
+		this( insets, null, 0, arc );
+	}
+
 	public Color getLineColor() {
 		return lineColor;
 	}
 
+	/**
+	 * Returns the (unscaled) line thickness used to paint the border.
+	 * The line thickness does not affect the border insets.
+	 */
 	public float getLineThickness() {
 		return lineThickness;
 	}
 
-	/** @since 2 */
+	/**
+	 * Returns the (unscaled) arc diameter of the border corners.
+	 *
+	 * @since 2
+	 */
 	public int getArc() {
 		return arc;
 	}
@@ -70,11 +90,31 @@ public class FlatLineBorder
 		if( c instanceof JComponent && ((JComponent)c).getClientProperty( FlatPopupFactory.KEY_POPUP_USES_NATIVE_BORDER ) != null )
 			return;
 
+		Color lineColor = getLineColor();
+		float lineThickness = getLineThickness();
+		if( lineColor == null || lineThickness <= 0 )
+			return;
+
+		int arc = getArc();
+		if( arc < 0 ) {
+			// get arc from label or panel
+			ComponentUI ui = (c instanceof JLabel)
+				? ((JLabel)c).getUI()
+				: (c instanceof JPanel ? ((JPanel)c).getUI() : null);
+			if( ui instanceof FlatLabelUI )
+				arc = ((FlatLabelUI)ui).arc;
+			else if( ui instanceof FlatPanelUI )
+				arc = ((FlatPanelUI)ui).arc;
+
+			if( arc < 0 )
+				arc = 0;
+		}
+
 		Graphics2D g2 = (Graphics2D) g.create();
 		try {
 			FlatUIUtils.setRenderingHints( g2 );
 			FlatUIUtils.paintOutlinedComponent( g2, x, y, width, height,
-				0, 0, 0, scale( getLineThickness() ), scale( getArc() ), null, getLineColor(), null );
+				0, 0, 0, scale( lineThickness ), scale( arc ), null, lineColor, null );
 		} finally {
 			g2.dispose();
 		}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatListUI.java

@@ -43,6 +43,7 @@ import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.util.Graphics2DProxy;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -56,6 +57,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault List.foreground						Color
  * @uiDefault List.selectionBackground				Color
  * @uiDefault List.selectionForeground				Color
+ * @uiDefault List.alternateRowColor				Color
  * @uiDefault List.dropLineColor					Color
  * @uiDefault List.border							Border
  * @uiDefault List.cellRenderer						ListCellRenderer
@@ -92,6 +94,7 @@ public class FlatListUI
 	@Styleable protected Color selectionForeground;
 	@Styleable protected Color selectionInactiveBackground;
 	@Styleable protected Color selectionInactiveForeground;
+	/** @since 3.6 */ @Styleable protected Color alternateRowColor;
 	/** @since 3 */ @Styleable protected Insets selectionInsets;
 	/** @since 3 */ @Styleable protected int selectionArc;
 
@@ -128,6 +131,7 @@ public class FlatListUI
 		selectionForeground = UIManager.getColor( "List.selectionForeground" );
 		selectionInactiveBackground = UIManager.getColor( "List.selectionInactiveBackground" );
 		selectionInactiveForeground = UIManager.getColor( "List.selectionInactiveForeground" );
+		alternateRowColor = UIManager.getColor( "List.alternateRowColor" );
 		selectionInsets = UIManager.getInsets( "List.selectionInsets" );
 		selectionArc = UIManager.getInt( "List.selectionArc" );
 
@@ -142,6 +146,7 @@ public class FlatListUI
 		selectionForeground = null;
 		selectionInactiveBackground = null;
 		selectionInactiveForeground = null;
+		alternateRowColor = null;
 
 		oldStyleValues = null;
 	}
@@ -182,7 +187,7 @@ public class FlatListUI
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle();
 					list.revalidate();
-					list.repaint();
+					HiDPIUtils.repaint( list );
 					break;
 			}
 		};
@@ -205,7 +210,7 @@ public class FlatListUI
 				Rectangle r = getCellBounds( list, firstIndex, lastIndex );
 				if( r != null ) {
 					int arc = (int) Math.ceil( UIScale.scale( selectionArc / 2f ) );
-					list.repaint( r.x - arc, r.y - arc, r.width + (arc * 2), r.height + (arc * 2) );
+					HiDPIUtils.repaint( list, r.x - arc, r.y - arc, r.width + (arc * 2), r.height + (arc * 2) );
 				}
 			}
 		};
@@ -298,13 +303,24 @@ public class FlatListUI
 	{
 		boolean isSelected = selModel.isSelectedIndex( row );
 
+		// paint alternating rows
+		if( alternateRowColor != null && row % 2 != 0 &&
+			!"ComboBox.list".equals( list.getName() ) ) // combobox does not support alternate row color
+		{
+			g.setColor( alternateRowColor );
+
+			float arc = UIScale.scale( selectionArc / 2f );
+			FlatUIUtils.paintSelection( (Graphics2D) g, rowBounds.x, rowBounds.y, rowBounds.width, rowBounds.height,
+				UIScale.scale( selectionInsets ), arc, arc, arc, arc, 0 );
+		}
+
 		// get renderer component
 		@SuppressWarnings( "unchecked" )
 		Component rendererComponent = cellRenderer.getListCellRendererComponent( list,
 			dataModel.getElementAt( row ), row, isSelected,
 			FlatUIUtils.isPermanentFocusOwner( list ) && (row == leadIndex) );
 
-		//
+		// use smaller cell width if list is used in JFileChooser
 		boolean isFileList = Boolean.TRUE.equals( list.getClientProperty( "List.isFileList" ) );
 		int cx, cw;
 		if( isFileList ) {
@@ -324,8 +340,7 @@ public class FlatListUI
 			(rendererComponent instanceof DefaultListCellRenderer ||
 			 rendererComponent instanceof BasicComboBoxRenderer) &&
 			(selectionArc > 0 ||
-			 (selectionInsets != null &&
+			 (selectionInsets != null && !FlatUIUtils.isInsetsEmpty( selectionInsets ))) )
-			  (selectionInsets.top != 0 || selectionInsets.left != 0 || selectionInsets.bottom != 0 || selectionInsets.right != 0))) )
 		{
 			// Because selection painting is done in the cell renderer, it would be
 			// necessary to require a FlatLaf specific renderer to implement rounded selection.
@@ -374,7 +389,15 @@ public class FlatListUI
 		rendererPane.paintComponent( g, rendererComponent, list, cx, rowBounds.y, cw, rowBounds.height, true );
 	}
 
-	/** @since 3 */
+	/**
+	 * Paints (rounded) cell selection.
+	 * Supports {@link #selectionArc} and {@link #selectionInsets}.
+	 * <p>
+	 * <b>Note:</b> This method is only invoked if either selection arc
+	 *              is greater than zero or if selection insets are not empty.
+	 *
+	 * @since 3
+	 */
 	protected void paintCellSelection( Graphics g, int row, int x, int y, int width, int height ) {
 		float arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight;
 		arcTopLeft = arcTopRight = arcBottomLeft = arcBottomRight = UIScale.scale( selectionArc / 2f );
@@ -440,7 +463,8 @@ public class FlatListUI
 	 * Paints a cell selection at the given coordinates.
 	 * The selection color must be set on the graphics context.
 	 * <p>
-	 * This method is intended for use in custom cell renderers.
+	 * This method is intended for use in custom cell renderers
+	 * to support {@link #selectionArc} and {@link #selectionInsets}.
 	 *
 	 * @since 3
 	 */

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatMenuItemRenderer.java

@@ -25,7 +25,9 @@ import java.awt.Font;
 import java.awt.FontMetrics;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
+import java.awt.GridLayout;
 import java.awt.Insets;
+import java.awt.LayoutManager;
 import java.awt.Paint;
 import java.awt.Rectangle;
 import java.awt.event.InputEvent;
@@ -35,6 +37,7 @@ import java.util.Map;
 import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.JMenu;
+import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;
 import javax.swing.KeyStroke;
 import javax.swing.SwingUtilities;
@@ -222,7 +225,7 @@ public class FlatMenuItemRenderer
 		}
 
 		// arrow size
-		if( !isTopLevelMenu && arrowIcon != null ) {
+		if( arrowIcon != null && (!isTopLevelMenu || isInVerticalMenuBar( menuItem )) ) {
 			// gap between text and arrow
 			if( accelText == null )
 				width += scale( textNoAcceleratorGap );
@@ -254,7 +257,8 @@ public class FlatMenuItemRenderer
 		boolean isTopLevelMenu = isTopLevelMenu( menuItem );
 
 		// layout arrow
-		if( !isTopLevelMenu && arrowIcon != null ) {
+		boolean showArrowIcon = (arrowIcon != null && (!isTopLevelMenu || isInVerticalMenuBar( menuItem )));
+		if( showArrowIcon ) {
 			arrowRect.width = arrowIcon.getIconWidth();
 			arrowRect.height = arrowIcon.getIconHeight();
 		} else
@@ -288,7 +292,7 @@ public class FlatMenuItemRenderer
 		int accelArrowWidth = accelRect.width + arrowRect.width;
 		if( accelText != null )
 			accelArrowWidth += scale( !isTopLevelMenu ? textAcceleratorGap : menuItem.getIconTextGap() );
-		if( !isTopLevelMenu && arrowIcon != null ) {
+		if( showArrowIcon ) {
 			if( accelText == null )
 				accelArrowWidth += scale( textNoAcceleratorGap );
 			accelArrowWidth += scale( acceleratorArrowGap );
@@ -355,7 +359,7 @@ debug*/
 		paintIcon( g, iconRect, getIconForPainting(), underlineSelection ? underlineSelectionCheckBackground : checkBackground, selectionBackground );
 		paintText( g, textRect, menuItem.getText(), selectionForeground, disabledForeground );
 		paintAccelerator( g, accelRect, getAcceleratorText(), acceleratorForeground, acceleratorSelectionForeground, disabledForeground );
-		if( !isTopLevelMenu( menuItem ) )
+		if( arrowIcon != null && (!isTopLevelMenu( menuItem ) || isInVerticalMenuBar( menuItem )) )
 			paintArrowIcon( g, arrowRect, arrowIcon );
 	}
 
@@ -520,6 +524,15 @@ debug*/
 		return menuItem instanceof JMenu && ((JMenu)menuItem).isTopLevelMenu();
 	}
 
+	/** @since 3.5 */
+	public static boolean isInVerticalMenuBar( JMenuItem menuItem ) {
+		if( !(menuItem instanceof JMenu) || !(menuItem.getParent() instanceof JMenuBar) )
+			return false;
+
+		LayoutManager layout = menuItem.getParent().getLayout();
+		return layout instanceof GridLayout && ((GridLayout)layout).getRows() != 1;
+	}
+
 	protected boolean isUnderlineSelection() {
 		return "underline".equals( UIManager.getString( "MenuItem.selectionType" ) );
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatMenuItemUI.java

@@ -103,13 +103,23 @@ public class FlatMenuItemUI
 		oldStyleValues = null;
 	}
 
+	@Override
+	protected void installComponents( JMenuItem menuItem ) {
+		super.installComponents( menuItem );
+
+		// update HTML renderer if necessary
+		FlatHTML.updateRendererCSSFontBaseSize( menuItem );
+	}
+
 	protected FlatMenuItemRenderer createRenderer() {
 		return new FlatMenuItemRenderer( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
 	}
 
 	@Override
 	protected PropertyChangeListener createPropertyChangeListener( JComponent c ) {
-		return FlatStylingSupport.createPropertyChangeListener( c, this::installStyle, super.createPropertyChangeListener( c ) );
+		return FlatHTML.createPropertyChangeListener(
+			FlatStylingSupport.createPropertyChangeListener( c, this::installStyle,
+				super.createPropertyChangeListener( c ) ) );
 	}
 
 	/** @since 2 */

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatMenuUI.java

@@ -47,6 +47,7 @@ import javax.swing.plaf.basic.BasicMenuUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableLookupProvider;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 
 /**
@@ -136,6 +137,14 @@ public class FlatMenuUI
 		oldStyleValues = null;
 	}
 
+	@Override
+	protected void installComponents( JMenuItem menuItem ) {
+		super.installComponents( menuItem );
+
+		// update HTML renderer if necessary
+		FlatHTML.updateRendererCSSFontBaseSize( menuItem );
+	}
+
 	protected FlatMenuItemRenderer createRenderer() {
 		return new FlatMenuRenderer( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
 	}
@@ -159,7 +168,7 @@ public class FlatMenuUI
 				JMenu menu = (JMenu) e.getSource();
 				if( menu.isTopLevelMenu() && menu.isRolloverEnabled() ) {
 					menu.getModel().setRollover( rollover );
-					menu.repaint();
+					HiDPIUtils.repaint( menu );
 				}
 			}
 		};
@@ -167,7 +176,9 @@ public class FlatMenuUI
 
 	@Override
 	protected PropertyChangeListener createPropertyChangeListener( JComponent c ) {
-		return FlatStylingSupport.createPropertyChangeListener( c, this::installStyle, super.createPropertyChangeListener( c ) );
+		return FlatHTML.createPropertyChangeListener(
+			FlatStylingSupport.createPropertyChangeListener( c, this::installStyle,
+				super.createPropertyChangeListener( c ) ) );
 	}
 
 	/** @since 2 */

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatNativeLibrary.java

@@ -58,6 +58,7 @@ class FlatNativeLibrary
 
 		String classifier;
 		String ext;
+		boolean unknownArch = false;
 		if( SystemInfo.isWindows_10_orLater && (SystemInfo.isX86 || SystemInfo.isX86_64 || SystemInfo.isAARCH64) ) {
 			// Windows: requires Windows 10/11 (x86, x86_64 or aarch64)
 
@@ -90,11 +91,14 @@ class FlatNativeLibrary
 			classifier = SystemInfo.isAARCH64 ? "macos-arm64" : "macos-x86_64";
 			ext = "dylib";
 
-		} else if( SystemInfo.isLinux && SystemInfo.isX86_64 ) {
+		} else if( SystemInfo.isLinux ) {
-			// Linux: requires x86_64
+			// Linux: x86_64 or aarch64 (but also supports unknown architectures)
 
-			classifier = "linux-x86_64";
+			classifier = SystemInfo.isAARCH64 ? "linux-arm64"
+				: (SystemInfo.isX86_64 ? "linux-x86_64"
+					: "linux-" + sanitize( System.getProperty( "os.arch" ) ));
 			ext = "so";
+			unknownArch = !SystemInfo.isX86_64 && !SystemInfo.isAARCH64;
 
 			// Load libjawt.so (part of JRE) explicitly because it is not found
 			// in all Java versions/distributions.
@@ -106,7 +110,7 @@ class FlatNativeLibrary
 			return; // no native library available for current OS or CPU architecture
 
 		// load native library
-		NativeLibrary nativeLibrary = createNativeLibrary( classifier, ext );
+		NativeLibrary nativeLibrary = createNativeLibrary( classifier, ext, unknownArch );
 		if( !nativeLibrary.isLoaded() )
 			return;
 
@@ -128,7 +132,7 @@ class FlatNativeLibrary
 		FlatNativeLibrary.nativeLibrary = nativeLibrary;
 	}
 
-	private static NativeLibrary createNativeLibrary( String classifier, String ext ) {
+	private static NativeLibrary createNativeLibrary( String classifier, String ext, boolean unknownArch ) {
 		String libraryName = "flatlaf-" + classifier;
 
 		// load from "java.library.path" or from path specified in system property "flatlaf.nativeLibraryPath"
@@ -139,9 +143,11 @@ class FlatNativeLibrary
 				if( library.isLoaded() )
 					return library;
 
-				LoggingFacade.INSTANCE.logSevere( "FlatLaf: Native library '" + System.mapLibraryName( libraryName )
+				if( !unknownArch ) {
-					+ "' not found in java.library.path '" + System.getProperty( "java.library.path" )
+					LoggingFacade.INSTANCE.logSevere( "FlatLaf: Native library '" + System.mapLibraryName( libraryName )
-					+ "'. Using extracted native library instead.", null );
+						+ "' not found in java.library.path '" + System.getProperty( "java.library.path" )
+						+ "'. Using extracted native library instead.", null );
+				}
 			} else {
 				// try standard library naming scheme
 				// (same as in flatlaf.jar in package 'com/formdev/flatlaf/natives')
@@ -160,11 +166,13 @@ class FlatNativeLibrary
 						return new NativeLibrary( libraryFile2, true );
 				}
 
-				LoggingFacade.INSTANCE.logSevere( "FlatLaf: Native library '"
+				if( !unknownArch ) {
-					+ libraryFile.getName()
+					LoggingFacade.INSTANCE.logSevere( "FlatLaf: Native library '"
-					+ (libraryName2 != null ? ("' or '" + libraryName2) : "")
+						+ libraryFile.getName()
-					+ "' not found in '" + libraryFile.getParentFile().getAbsolutePath()
+						+ (libraryName2 != null ? ("' or '" + libraryName2) : "")
-					+ "'. Using extracted native library instead.", null );
+						+ "' not found in '" + libraryFile.getParentFile().getAbsolutePath()
+						+ "'. Using extracted native library instead.", null );
+				}
 			}
 		}
 
@@ -175,7 +183,7 @@ class FlatNativeLibrary
 			return new NativeLibrary( libraryFile, true );
 
 		// load from FlatLaf jar (extract native library to temp folder)
-		return new NativeLibrary( "com/formdev/flatlaf/natives/" + libraryName, null, true );
+		return new NativeLibrary( "com/formdev/flatlaf/natives/" + libraryName, null, !unknownArch );
 	}
 
 	/**
@@ -273,6 +281,13 @@ class FlatNativeLibrary
 			+ '-' + classifier + '.' + ext;
 	}
 
+	/**
+	 * Allow only 'a'-'z', 'A'-'Z', '0'-'9', '_' and '-' in filenames.
+	 */
+	private static String sanitize( String s ) {
+		return s.replaceAll( "[^a-zA-Z0-9_-]", "_" );
+	}
+
 	private static void loadJAWT() {
 		try {
 			System.loadLibrary( "jawt" );

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatNativeLinuxLibrary.java

@@ -16,6 +16,7 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.GraphicsConfiguration;
 import java.awt.Point;
 import java.awt.Toolkit;
 import java.awt.Window;
@@ -48,8 +49,17 @@ class FlatNativeLinuxLibrary
 	}
 
 	// direction for _NET_WM_MOVERESIZE message
-	// see https://specifications.freedesktop.org/wm-spec/wm-spec-latest.html
+	// see https://specifications.freedesktop.org/wm-spec/latest/ar01s04.html
-	static final int MOVE = 8;
+	static final int
+		SIZE_TOPLEFT     = 0,
+		SIZE_TOP         = 1,
+		SIZE_TOPRIGHT    = 2,
+		SIZE_RIGHT       = 3,
+		SIZE_BOTTOMRIGHT = 4,
+		SIZE_BOTTOM      = 5,
+		SIZE_BOTTOMLEFT  = 6,
+		SIZE_LEFT        = 7,
+		MOVE             = 8;
 
 	private static Boolean isXWindowSystem;
 
@@ -96,7 +106,11 @@ class FlatNativeLinuxLibrary
 	}
 
 	private static Point scale( Window window, Point pt ) {
-		AffineTransform transform = window.getGraphicsConfiguration().getDefaultTransform();
+		GraphicsConfiguration gc = window.getGraphicsConfiguration();
+		if( gc == null )
+			return pt;
+
+		AffineTransform transform = gc.getDefaultTransform();
 		int x = (int) Math.round( pt.x * transform.getScaleX() );
 		int y = (int) Math.round( pt.y * transform.getScaleY() );
 		return new Point( x, y );

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatPanelUI.java

@@ -25,11 +25,13 @@ import java.util.Map;
 import javax.swing.JComponent;
 import javax.swing.JPanel;
 import javax.swing.LookAndFeel;
+import javax.swing.border.Border;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicPanelUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -110,7 +112,7 @@ public class FlatPanelUI
 				} else
 					installStyle( c );
 				c.revalidate();
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER:
@@ -160,32 +162,38 @@ public class FlatPanelUI
 
 	@Override
 	public void update( Graphics g, JComponent c ) {
-		// fill background
+		fillRoundedBackground( g, c, arc );
-		if( c.isOpaque() ) {
+		paint( g, c );
-			int width = c.getWidth();
+	}
-			int height = c.getHeight();
-			int arc = (this.arc >= 0)
-				? this.arc
-				: ((c.getBorder() instanceof FlatLineBorder)
-					? ((FlatLineBorder)c.getBorder()).getArc()
-					: 0);
 
-			// fill background with parent color to avoid garbage in rounded corners
+	/** @since 3.5 */
-			if( arc > 0 )
+	public static void fillRoundedBackground( Graphics g, JComponent c, int arc ) {
-				FlatUIUtils.paintParentBackground( g, c );
+		if( arc < 0 ) {
-
+			Border border = c.getBorder();
-			g.setColor( c.getBackground() );
+			arc = ((border instanceof FlatLineBorder)
-			if( arc > 0 ) {
+				? ((FlatLineBorder)border).getArc()
-				// fill rounded rectangle if having rounded corners
+				: 0);
-				Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
-				FlatUIUtils.paintComponentBackground( (Graphics2D) g, 0, 0, width, height,
-					0, UIScale.scale( arc ) );
-				FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
-			} else
-				g.fillRect( 0, 0, width, height );
 		}
 
-		paint( g, c );
+		// fill background
+		if( c.isOpaque() ) {
+			if( arc > 0 ) {
+				// fill background with parent color to avoid garbage in rounded corners
+				FlatUIUtils.paintParentBackground( g, c );
+			} else {
+				g.setColor( c.getBackground() );
+				g.fillRect( 0, 0, c.getWidth(), c.getHeight() );
+			}
+		}
+
+		// fill rounded rectangle if having rounded corners
+		if( arc > 0 ) {
+			g.setColor( c.getBackground() );
+			Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
+			FlatUIUtils.paintComponentBackground( (Graphics2D) g, 0, 0, c.getWidth(), c.getHeight(),
+				0, UIScale.scale( arc ) );
+			FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
+		}
 	}
 
 	@Override

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatPasswordFieldUI.java

@@ -43,6 +43,7 @@ import javax.swing.text.View;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.icons.FlatCapsLockIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -163,7 +164,7 @@ public class FlatPasswordFieldUI
 			}
 			private void repaint( KeyEvent e ) {
 				if( e.getKeyCode() == KeyEvent.VK_CAPS_LOCK ) {
-					e.getComponent().repaint();
+					HiDPIUtils.repaint( e.getComponent() );
 					scrollCaretToVisible();
 				}
 			}
@@ -326,7 +327,7 @@ public class FlatPasswordFieldUI
 		if( visible != revealButton.isVisible() ) {
 			revealButton.setVisible( visible );
 			c.revalidate();
-			c.repaint();
+			HiDPIUtils.repaint( c );
 
 			if( !visible ) {
 				revealButton.setSelected( false );

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatPopupFactory.java

@@ -17,6 +17,7 @@
 package com.formdev.flatlaf.ui;
 
 import java.awt.AWTEvent;
+import java.awt.BorderLayout;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Container;
@@ -31,16 +32,19 @@ import java.awt.Panel;
 import java.awt.Point;
 import java.awt.PointerInfo;
 import java.awt.Rectangle;
-import java.awt.Toolkit;
 import java.awt.Window;
 import java.awt.event.ComponentEvent;
 import java.awt.event.ComponentListener;
+import java.awt.event.HierarchyEvent;
+import java.awt.event.HierarchyListener;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowFocusListener;
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
 import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.concurrent.atomic.AtomicReference;
 import javax.swing.JComponent;
 import javax.swing.JLayeredPane;
 import javax.swing.JPanel;
@@ -58,6 +62,7 @@ import javax.swing.border.EmptyBorder;
 import javax.swing.border.LineBorder;
 import javax.swing.plaf.basic.BasicComboPopup;
 import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.FlatSystemProperties;
 import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -76,6 +81,8 @@ public class FlatPopupFactory
 	private MethodHandle java8getPopupMethod;
 	private MethodHandle java9getPopupMethod;
 
+	private final ArrayList<NonFlashingPopup> stillShownHeavyWeightPopups = new ArrayList<>();
+
 	@Override
 	public Popup getPopup( Component owner, Component contents, int x, int y )
 		throws IllegalArgumentException
@@ -88,15 +95,28 @@ public class FlatPopupFactory
 
 		fixLinuxWaylandJava21focusIssue( owner );
 
+		// reuse a heavy weight popup window, which is still shown on screen,
+		// to avoid flicker when popup (e.g. tooltip) is moving while mouse is moved
+		for( NonFlashingPopup popup : stillShownHeavyWeightPopups ) {
+			if( popup.delegate != null &&
+				popup.owner == owner &&
+				(popup.contents == contents ||
+				 (popup.contents instanceof JToolTip && contents instanceof JToolTip)) )
+			{
+				stillShownHeavyWeightPopups.remove( popup );
+				return reuseStillShownHeavyWeightPopups( popup, contents, x, y );
+			}
+		}
+
 		boolean forceHeavyWeight = isOptionEnabled( owner, contents, FlatClientProperties.POPUP_FORCE_HEAVY_WEIGHT, "Popup.forceHeavyWeight" );
 
 		if( !isOptionEnabled( owner, contents, FlatClientProperties.POPUP_DROP_SHADOW_PAINTED, "Popup.dropShadowPainted" ) || SystemInfo.isProjector || SystemInfo.isWebswing )
-			return new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight ), contents );
+			return new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight ), owner, contents );
 
 		// macOS and Linux adds drop shadow to heavy weight popups
 		if( SystemInfo.isMacOS || SystemInfo.isLinux ) {
-			NonFlashingPopup popup = new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, true ), contents );
+			NonFlashingPopup popup = new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, true ), owner, contents );
-			if( popup.popupWindow != null && SystemInfo.isMacOS && FlatNativeMacLibrary.isLoaded() )
+			if( popup.popupWindow != null && isMacOSBorderSupported() )
 				setupRoundedBorder( popup.popupWindow, owner, contents );
 			return popup;
 		}
@@ -105,7 +125,7 @@ public class FlatPopupFactory
 		if( isWindows11BorderSupported() &&
 			getBorderCornerRadius( owner, contents ) > 0 )
 		{
-			NonFlashingPopup popup = new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, true ), contents );
+			NonFlashingPopup popup = new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, true ), owner, contents );
 			if( popup.popupWindow != null )
 				setupRoundedBorder( popup.popupWindow, owner, contents );
 			return popup;
@@ -116,7 +136,11 @@ public class FlatPopupFactory
 			forceHeavyWeight = true;
 
 		// create drop shadow popup
-		return new DropShadowPopup( getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight ), owner, contents );
+		Popup popupForScreenOfOwner = getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight );
+		GraphicsConfiguration gc = (owner != null) ? owner.getGraphicsConfiguration() : null;
+		return (gc != null && gc.isTranslucencyCapable())
+			? new DropShadowPopup( popupForScreenOfOwner, owner, contents )
+			: new NonFlashingPopup( popupForScreenOfOwner, owner, contents );
 	}
 
 	/**
@@ -227,6 +251,24 @@ public class FlatPopupFactory
 		return UIManager.get( uiKey );
 	}
 
+	/**
+	 * Reuse a heavy weight popup window, which is still shown on screen,
+	 * by updating window location and contents.
+	 * This avoid flicker when popup (e.g. a tooltip) is moving while mouse is moved.
+	 * E.g. overridden JComponent.getToolTipLocation(MouseEvent).
+	 * See ToolTipManager.checkForTipChange(MouseEvent).
+	 */
+	private static NonFlashingPopup reuseStillShownHeavyWeightPopups(
+		NonFlashingPopup reusePopup, Component contents, int ownerX, int ownerY )
+	{
+		// clone popup because PopupFactory.getPopup() should not return old instance
+		NonFlashingPopup popup = reusePopup.cloneForReuse();
+
+		// update popup location, size and contents
+		popup.reset( contents, ownerX, ownerY );
+		return popup;
+	}
+
 	//---- tooltips -----------------------------------------------------------
 
 	/**
@@ -263,13 +305,13 @@ public class FlatPopupFactory
 				break;
 			}
 		}
-		if( gc == null )
+		if( gc == null && owner != null )
 			gc = owner.getGraphicsConfiguration();
 		if( gc == null )
 			return null;
 
 		Rectangle screenBounds = gc.getBounds();
-		Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets( gc );
+		Insets screenInsets = FlatUIUtils.getScreenInsets( gc );
 		int screenTop = screenBounds.y + screenInsets.top;
 
 		// place tooltip above mouse location if there is enough space
@@ -316,19 +358,23 @@ public class FlatPopupFactory
 	//---- native rounded border ----------------------------------------------
 
 	private static boolean isWindows11BorderSupported() {
-		return SystemInfo.isWindows_11_orLater && FlatNativeWindowsLibrary.isLoaded();
+		return SystemInfo.isWindows_11_orLater &&
+			FlatSystemProperties.getBoolean( FlatSystemProperties.USE_ROUNDED_POPUP_BORDER, true ) &&
+			FlatNativeWindowsLibrary.isLoaded();
+	}
+
+	private static boolean isMacOSBorderSupported() {
+		return SystemInfo.isMacOS &&
+			FlatSystemProperties.getBoolean( FlatSystemProperties.USE_ROUNDED_POPUP_BORDER, true ) &&
+			FlatNativeMacLibrary.isLoaded();
 	}
 
 	private static void setupRoundedBorder( Window popupWindow, Component owner, Component contents ) {
-		// make sure that the native window is created
-		if( !popupWindow.isDisplayable() )
-			popupWindow.addNotify();
-
 		int borderCornerRadius = getBorderCornerRadius( owner, contents );
 		float borderWidth = getRoundedBorderWidth( owner, contents );
 
 		// get Swing border color
-		Color borderColor = null; // use system default color
+		Color borderColor;
 		if( contents instanceof JComponent ) {
 			Border border = ((JComponent)contents).getBorder();
 			border = FlatUIUtils.unwrapNonUIResourceBorder( border );
@@ -340,11 +386,33 @@ public class FlatPopupFactory
 				borderColor = ((LineBorder)border).getLineColor();
 			else if( border instanceof EmptyBorder )
 				borderColor = FlatNativeWindowsLibrary.COLOR_NONE; // do not paint border
+			else
+				borderColor = null; // use system default color
 
 			// avoid that FlatLineBorder paints the Swing border
 			((JComponent)contents).putClientProperty( KEY_POPUP_USES_NATIVE_BORDER, true );
-		}
+		} else
+			borderColor = null; // use system default color
 
+		if( popupWindow.isDisplayable() ) {
+			// native window already created
+			setupRoundedBorderImpl( popupWindow, borderCornerRadius, borderWidth, borderColor );
+		} else {
+			// native window not yet created --> add listener to set native border after window creation
+			AtomicReference<HierarchyListener> l = new AtomicReference<>();
+			l.set( e -> {
+				if( e.getID() == HierarchyEvent.HIERARCHY_CHANGED &&
+					(e.getChangeFlags() & HierarchyEvent.DISPLAYABILITY_CHANGED) != 0 )
+				{
+					setupRoundedBorderImpl( popupWindow, borderCornerRadius, borderWidth, borderColor );
+					popupWindow.removeHierarchyListener( l.get() );
+				}
+			} );
+			popupWindow.addHierarchyListener( l.get() );
+		}
+	}
+
+	private static void setupRoundedBorderImpl( Window popupWindow, int borderCornerRadius, float borderWidth, Color borderColor ) {
 		if( SystemInfo.isWindows ) {
 			// get native window handle
 			long hwnd = FlatNativeWindowsLibrary.getHWND( popupWindow );
@@ -490,18 +558,31 @@ public class FlatPopupFactory
 
 	//---- class NonFlashingPopup ---------------------------------------------
 
-	private static class NonFlashingPopup
+	/**
+	 * Fixes popup background flashing effect when using dark theme on light platform theme,
+	 * where the light popup background is shown for a fraction of a second before
+	 * the dark popup content is shown.
+	 * This is fixed by setting popup background to content background.
+	 * <p>
+	 * Defers hiding of heavy weight popup window for an event cycle,
+	 * which allows reusing popup window to avoid flicker when "moving" popup.
+	 */
+	private class NonFlashingPopup
 		extends Popup
 	{
 		private Popup delegate;
+		Component owner;
 		private Component contents;
 
 		// heavy weight
-		protected Window popupWindow;
+		Window popupWindow;
 		private Color oldPopupWindowBackground;
 
-		NonFlashingPopup( Popup delegate, Component contents ) {
+		private boolean disposed;
+
+		NonFlashingPopup( Popup delegate, Component owner, Component contents ) {
 			this.delegate = delegate;
+			this.owner = owner;
 			this.contents = contents;
 
 			popupWindow = SwingUtilities.windowForComponent( contents );
@@ -515,10 +596,52 @@ public class FlatPopupFactory
 			}
 		}
 
+		private NonFlashingPopup( NonFlashingPopup reusePopup ) {
+			delegate = reusePopup.delegate;
+			owner = reusePopup.owner;
+			contents = reusePopup.contents;
+			popupWindow = reusePopup.popupWindow;
+			oldPopupWindowBackground = reusePopup.oldPopupWindowBackground;
+		}
+
+		NonFlashingPopup cloneForReuse() {
+			return new NonFlashingPopup( this );
+		}
+
 		@Override
-		public void show() {
+		public final void show() {
+			if( disposed )
+				return;
+
+			showImpl();
+		}
+
+		void showImpl() {
 			if( delegate != null ) {
-				showPopupAndFixLocation( delegate, popupWindow );
+				// On macOS and Linux, the empty popup window is shown in popup.show()
+				// (in peer.setVisible(true) invoked from Component.show()),
+				// but the popup content is painted later via repaint manager.
+				// This may cause some flicker, especially during JVM warm-up or
+				// when running JVM in interpreter mode (option -Xint).
+				// To reduce flicker, immediately paint popup content as soon as popup window becomes visible.
+				// This also fixes a problem with JetBrainsRuntime JVM, where sometimes the popups were empty.
+				if( (SystemInfo.isMacOS || SystemInfo.isLinux) && popupWindow instanceof JWindow ) {
+					HierarchyListener l = e -> {
+						if( e.getID() == HierarchyEvent.HIERARCHY_CHANGED &&
+							(e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) != 0 )
+						{
+							((JWindow)popupWindow).getRootPane().paintImmediately(
+								0, 0, popupWindow.getWidth(), popupWindow.getHeight() );
+						}
+					};
+					popupWindow.addHierarchyListener( l );
+					try {
+						showPopupAndFixLocation( delegate, popupWindow );
+					} finally {
+						popupWindow.removeHierarchyListener( l );
+					}
+				} else
+					showPopupAndFixLocation( delegate, popupWindow );
 
 				// increase tooltip size if necessary because it may be too small on HiDPI screens
 				//    https://bugs.openjdk.java.net/browse/JDK-8213535
@@ -540,13 +663,36 @@ public class FlatPopupFactory
 		}
 
 		@Override
-		public void hide() {
+		public final void hide() {
+			if( disposed )
+				return;
+			disposed = true;
+
+			// immediately hide non-heavy weight popups or combobox popups
+			if( !(popupWindow instanceof JWindow) || contents instanceof BasicComboPopup ) {
+				hideImpl();
+				return;
+			}
+
+			// defer hiding of heavy weight popup window for an event cycle,
+			// which allows reusing popup window to avoid flicker when "moving" popup
+			((JWindow)popupWindow).getContentPane().removeAll();
+			stillShownHeavyWeightPopups.add( this );
+			EventQueue.invokeLater( () -> {
+				// hide popup if it was not reused
+				if( stillShownHeavyWeightPopups.remove( this ) )
+					hideImpl();
+			} );
+		}
+
+		void hideImpl() {
 			if( contents instanceof JComponent )
 				((JComponent)contents).putClientProperty( KEY_POPUP_USES_NATIVE_BORDER, null );
 
 			if( delegate != null ) {
 				delegate.hide();
 				delegate = null;
+				owner = null;
 				contents = null;
 			}
 
@@ -554,18 +700,54 @@ public class FlatPopupFactory
 				// restore background so that it can not affect other LaFs (when switching)
 				// because popup windows are cached and reused
 				popupWindow.setBackground( oldPopupWindowBackground );
+
+				// On macOS, popupWindow.setBackground(...) invoked from constructor,
+				// has no affect if the popup window peer (a NSWindow) is already created,
+				// which is the case when reusing a cached popup window
+				// (see class PopupFactory.HeavyWeightPopup).
+				// This may result in flicker when e.g. showing a popup in a light theme,
+				// then switching to a dark theme and again showing a popup,
+				// because the underling NSWindow still has a light background,
+				// which may be shown shortly before the actual dark popup content is shown.
+				// To fix this, dispose the popup window, which disposes the NSWindow.
+				// The AWT popup window stays in the popup cache, but when reusing it later,
+				// a new peer and a new NSWindow is created and gets the correct background.
+				if( SystemInfo.isMacOS )
+					popupWindow.dispose();
+
 				popupWindow = null;
 			}
 		}
+
+		void reset( Component contents, int ownerX, int ownerY ) {
+			// update popup window location
+			popupWindow.setLocation( ownerX, ownerY );
+
+			// replace component in content pane
+			Container contentPane = ((JWindow)popupWindow).getContentPane();
+			contentPane.removeAll();
+			contentPane.add( contents, BorderLayout.CENTER );
+			popupWindow.pack();
+
+			// update client property on contents
+			if( this.contents != contents ) {
+				Object old = (this.contents instanceof JComponent)
+					? ((JComponent)this.contents).getClientProperty( KEY_POPUP_USES_NATIVE_BORDER )
+					: null;
+				if( contents instanceof JComponent )
+					((JComponent)contents).putClientProperty( KEY_POPUP_USES_NATIVE_BORDER, old );
+
+				this.contents = contents;
+			}
+		}
 	}
 
 	//---- class DropShadowPopup ----------------------------------------------
 
 	private class DropShadowPopup
 		extends NonFlashingPopup
+		implements ComponentListener
 	{
-		private final Component owner;
-
 		// light weight
 		private JComponent lightComp;
 		private Border oldBorder;
@@ -580,11 +762,11 @@ public class FlatPopupFactory
 		// heavy weight
 		private Popup dropShadowDelegate;
 		private Window dropShadowWindow;
+		private JPanel dropShadowPanel2;
 		private Color oldDropShadowWindowBackground;
 
 		DropShadowPopup( Popup delegate, Component owner, Component contents ) {
-			super( delegate, contents );
+			super( delegate, owner, contents );
-			this.owner = owner;
 
 			Dimension size = contents.getPreferredSize();
 			if( size.width <= 0 || size.height <= 0 )
@@ -600,31 +782,31 @@ public class FlatPopupFactory
 				// the drop shadow and is positioned behind the popup window.
 
 				// create panel that paints the drop shadow
-				JPanel dropShadowPanel = new JPanel();
+				dropShadowPanel2 = new JPanel();
-				dropShadowPanel.setBorder( createDropShadowBorder() );
+				dropShadowPanel2.setBorder( createDropShadowBorder() );
-				dropShadowPanel.setOpaque( false );
+				dropShadowPanel2.setOpaque( false );
 
 				// set preferred size of drop shadow panel
 				Dimension prefSize = popupWindow.getPreferredSize();
-				Insets insets = dropShadowPanel.getInsets();
+				Insets insets = dropShadowPanel2.getInsets();
-				dropShadowPanel.setPreferredSize( new Dimension(
+				dropShadowPanel2.setPreferredSize( new Dimension(
 					prefSize.width + insets.left + insets.right,
 					prefSize.height + insets.top + insets.bottom ) );
 
 				// create heavy weight popup for drop shadow
 				int x = popupWindow.getX() - insets.left;
 				int y = popupWindow.getY() - insets.top;
-				dropShadowDelegate = getPopupForScreenOfOwner( owner, dropShadowPanel, x, y, true );
+				dropShadowDelegate = getPopupForScreenOfOwner( owner, dropShadowPanel2, x, y, true );
 
 				// make drop shadow popup window translucent
-				dropShadowWindow = SwingUtilities.windowForComponent( dropShadowPanel );
+				dropShadowWindow = SwingUtilities.windowForComponent( dropShadowPanel2 );
 				if( dropShadowWindow != null ) {
 					oldDropShadowWindowBackground = dropShadowWindow.getBackground();
 					dropShadowWindow.setBackground( new Color( 0, true ) );
 				}
 
 				// Windows 11: reset corner preference on reused heavy weight popups
-				if( isWindows11BorderSupported() ) {
+				if( SystemInfo.isWindows_11_orLater && FlatNativeWindowsLibrary.isLoaded() ) {
 					resetWindows11Border( popupWindow );
 					if( dropShadowWindow != null )
 						resetWindows11Border( dropShadowWindow );
@@ -654,6 +836,23 @@ public class FlatPopupFactory
 			}
 		}
 
+		private DropShadowPopup( DropShadowPopup reusePopup ) {
+			super( reusePopup );
+
+			// not necessary to clone fields used for light/medium weight popups
+
+			// heavy weight
+			dropShadowDelegate = reusePopup.dropShadowDelegate;
+			dropShadowWindow = reusePopup.dropShadowWindow;
+			dropShadowPanel2 = reusePopup.dropShadowPanel2;
+			oldDropShadowWindowBackground = reusePopup.oldDropShadowWindowBackground;
+		}
+
+		@Override
+		NonFlashingPopup cloneForReuse() {
+			return new DropShadowPopup( this );
+		}
+
 		private Border createDropShadowBorder() {
 			return new FlatDropShadowBorder(
 				UIManager.getColor( "Popup.dropShadowColor" ),
@@ -662,14 +861,14 @@ public class FlatPopupFactory
 		}
 
 		@Override
-		public void show() {
+		void showImpl() {
 			if( dropShadowDelegate != null )
 				showPopupAndFixLocation( dropShadowDelegate, dropShadowWindow );
 
 			if( mediumWeightPanel != null )
 				showMediumWeightDropShadow();
 
-			super.show();
+			super.showImpl();
 
 			// fix location of light weight popup in case it has left or top drop shadow
 			if( lightComp != null ) {
@@ -677,13 +876,22 @@ public class FlatPopupFactory
 				if( insets.left != 0 || insets.top != 0 )
 					lightComp.setLocation( lightComp.getX() - insets.left, lightComp.getY() - insets.top );
 			}
+
+			if( popupWindow != null ) {
+				removeAllPopupWindowComponentListeners();
+				popupWindow.addComponentListener( this );
+			}
 		}
 
 		@Override
-		public void hide() {
+		void hideImpl() {
+			if( popupWindow != null )
+				removeAllPopupWindowComponentListeners();
+
 			if( dropShadowDelegate != null ) {
 				dropShadowDelegate.hide();
 				dropShadowDelegate = null;
+				dropShadowPanel2 = null;
 			}
 
 			if( mediumWeightPanel != null ) {
@@ -692,7 +900,7 @@ public class FlatPopupFactory
 				mediumWeightPanel = null;
 			}
 
-			super.hide();
+			super.hideImpl();
 
 			if( dropShadowWindow != null ) {
 				dropShadowWindow.setBackground( oldDropShadowWindowBackground );
@@ -776,5 +984,58 @@ public class FlatPopupFactory
 			if( dropShadowPanel != null && mediumWeightPanel != null )
 				dropShadowPanel.setSize( FlatUIUtils.addInsets( mediumWeightPanel.getSize(), dropShadowPanel.getInsets() ) );
 		}
+
+		@Override
+		void reset( Component contents, int ownerX, int ownerY ) {
+			if( popupWindow != null )
+				removeAllPopupWindowComponentListeners();
+
+			super.reset( contents, ownerX, ownerY );
+
+			updateDropShadowWindowBounds();
+		}
+
+		private void updateDropShadowWindowBounds() {
+			if( dropShadowWindow == null )
+				return;
+
+			// calculate size of drop shadow window
+			Dimension size = popupWindow.getSize();
+			Insets insets = dropShadowPanel2.getInsets();
+			int w = size.width + insets.left + insets.right;
+			int h = size.height + insets.top + insets.bottom;
+
+			// update drop shadow popup window bounds
+			int x = popupWindow.getX() - insets.left;
+			int y = popupWindow.getY() - insets.top;
+			dropShadowWindow.setBounds( x, y, w, h );
+			dropShadowWindow.validate();
+		}
+
+		private void removeAllPopupWindowComponentListeners() {
+			// make sure that there is no old component listener
+			// necessary because this class is cloned if reusing popup windows
+			for( ComponentListener l : popupWindow.getComponentListeners() ) {
+				if( l instanceof DropShadowPopup )
+					popupWindow.removeComponentListener( l );
+			}
+		}
+
+		//---- interface ComponentListener ----
+
+		@Override
+		public void componentResized( ComponentEvent e ) {
+			if( e.getSource() == popupWindow )
+				updateDropShadowWindowBounds();
+		}
+
+		@Override
+		public void componentMoved( ComponentEvent e ) {
+			if( e.getSource() == popupWindow )
+				updateDropShadowWindowBounds();
+		}
+
+		@Override public void componentShown( ComponentEvent e ) {}
+		@Override public void componentHidden( ComponentEvent e ) {}
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatPopupMenuUI.java

@@ -239,12 +239,14 @@ public class FlatPopupMenuUI
 		if( gc == null && popupMenu.getInvoker() != null )
 			gc = popupMenu.getInvoker().getGraphicsConfiguration();
 
-		// compute screen height
+		if( gc == null )
+			return new Rectangle( Toolkit.getDefaultToolkit().getScreenSize() );
+
+		// compute screen bounds
 		// (always subtract screen insets because there is no API to detect whether
 		// the popup can overlap the taskbar; see JPopupMenu.canPopupOverlapTaskBar())
-		Toolkit toolkit = Toolkit.getDefaultToolkit();
+		Rectangle screenBounds = gc.getBounds();
-		Rectangle screenBounds = (gc != null) ? gc.getBounds() : new Rectangle( toolkit.getScreenSize() );
+		Insets screenInsets = FlatUIUtils.getScreenInsets( gc );
-		Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets( gc );
 		return FlatUIUtils.subtractInsets( screenBounds, screenInsets );
 	}
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatProgressBarUI.java

@@ -18,6 +18,7 @@ package com.formdev.flatlaf.ui;
 
 import static com.formdev.flatlaf.FlatClientProperties.*;
 import java.awt.Dimension;
+import java.awt.EventQueue;
 import java.awt.FontMetrics;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
@@ -86,6 +87,17 @@ public class FlatProgressBarUI
 		installStyle();
 	}
 
+	@Override
+	public void uninstallUI( JComponent c ) {
+		if( !EventQueue.isDispatchThread() && progressBar.isIndeterminate() ) {
+			LoggingFacade.INSTANCE.logSevere(
+				"FlatLaf: Uninstalling indeterminate progress bar UI not on AWT thread may throw NPE in FlatProgressBarUI.paint(). Use SwingUtilities.invokeLater().",
+				new IllegalStateException() );
+		}
+
+		super.uninstallUI( c );
+	}
+
 	@Override
 	protected void installDefaults() {
 		super.installDefaults();
@@ -110,17 +122,25 @@ public class FlatProgressBarUI
 
 		propertyChangeListener = e -> {
 			switch( e.getPropertyName() ) {
+				case "indeterminate":
+					if( !EventQueue.isDispatchThread() && !progressBar.isIndeterminate() ) {
+						LoggingFacade.INSTANCE.logSevere(
+							"FlatLaf: Using JProgressBar.setIndeterminate(false) not on AWT thread may throw NPE in FlatProgressBarUI.paint(). Use SwingUtilities.invokeLater().",
+							new IllegalStateException() );
+					}
+					break;
+
 				case PROGRESS_BAR_LARGE_HEIGHT:
 				case PROGRESS_BAR_SQUARE:
 					progressBar.revalidate();
-					progressBar.repaint();
+					HiDPIUtils.repaint( progressBar );
 					break;
 
 				case STYLE:
 				case STYLE_CLASS:
 					installStyle();
 					progressBar.revalidate();
-					progressBar.repaint();
+					HiDPIUtils.repaint( progressBar );
 					break;
 			}
 		};
@@ -274,6 +294,6 @@ public class FlatProgressBarUI
 		// Only solution is to repaint whole progress bar.
 		double systemScaleFactor = UIScale.getSystemScaleFactor( progressBar.getGraphicsConfiguration() );
 		if( (int) systemScaleFactor != systemScaleFactor )
-			progressBar.repaint();
+			HiDPIUtils.repaint( progressBar );
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatRadioButtonMenuItemUI.java

@@ -23,6 +23,7 @@ import java.lang.invoke.MethodHandles;
 import java.util.Map;
 import javax.swing.Icon;
 import javax.swing.JComponent;
+import javax.swing.JMenuItem;
 import javax.swing.LookAndFeel;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicMenuItemUI;
@@ -102,13 +103,23 @@ public class FlatRadioButtonMenuItemUI
 		oldStyleValues = null;
 	}
 
+	@Override
+	protected void installComponents( JMenuItem menuItem ) {
+		super.installComponents( menuItem );
+
+		// update HTML renderer if necessary
+		FlatHTML.updateRendererCSSFontBaseSize( menuItem );
+	}
+
 	protected FlatMenuItemRenderer createRenderer() {
 		return new FlatMenuItemRenderer( menuItem, checkIcon, arrowIcon, acceleratorFont, acceleratorDelimiter );
 	}
 
 	@Override
 	protected PropertyChangeListener createPropertyChangeListener( JComponent c ) {
-		return FlatStylingSupport.createPropertyChangeListener( c, this::installStyle, super.createPropertyChangeListener( c ) );
+		return FlatHTML.createPropertyChangeListener(
+			FlatStylingSupport.createPropertyChangeListener( c, this::installStyle,
+				super.createPropertyChangeListener( c ) ) );
 	}
 
 	/** @since 2 */

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatRadioButtonUI.java

@@ -40,12 +40,14 @@ import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicButtonListener;
+import javax.swing.plaf.basic.BasicHTML;
 import javax.swing.plaf.basic.BasicRadioButtonUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.icons.FlatCheckBoxIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -159,6 +161,10 @@ public class FlatRadioButtonUI
 	/** @since 2 */
 	protected void propertyChange( AbstractButton b, PropertyChangeEvent e ) {
 		switch( e.getPropertyName() ) {
+			case BasicHTML.propertyKey:
+				FlatHTML.updateRendererCSSFontBaseSize( b );
+				break;
+
 			case FlatClientProperties.STYLE:
 			case FlatClientProperties.STYLE_CLASS:
 				if( shared && FlatStylingSupport.hasStyleProperty( b ) ) {
@@ -168,7 +174,7 @@ public class FlatRadioButtonUI
 				} else
 					installStyle( b );
 				b.revalidate();
-				b.repaint();
+				HiDPIUtils.repaint( b );
 				break;
 		}
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatRootPaneUI.java

@@ -31,6 +31,7 @@ import java.awt.Window;
 import java.awt.event.ComponentListener;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
+import java.util.Objects;
 import java.util.function.Function;
 import javax.swing.JComponent;
 import javax.swing.JDialog;
@@ -448,6 +449,11 @@ public class FlatRootPaneUI
 					titlePane.titleBarColorsChanged();
 				break;
 
+			case FlatClientProperties.TITLE_BAR_HEIGHT:
+				if( titlePane != null )
+					titlePane.revalidate();
+				break;
+
 			case FlatClientProperties.FULL_WINDOW_CONTENT:
 				if( titlePane != null ) {
 					rootPane.getLayeredPane().setLayer( titlePane, getLayerForTitlePane() );
@@ -480,8 +486,12 @@ public class FlatRootPaneUI
 				break;
 
 			case "ancestor":
-				if( e.getNewValue() instanceof Window )
+				if( e.getNewValue() instanceof Window ) {
+					if( titlePane != null && !Objects.equals( titlePane.windowStyle, FlatTitlePane.getWindowStyle( rootPane ) ) )
+						setTitlePane( createTitlePane() );
+
 					macClearBackgroundForTranslucentWindow( rootPane );
+				}
 
 				macUninstallWindowBackgroundListener( rootPane );
 				macInstallWindowBackgroundListener( rootPane );
@@ -679,7 +689,7 @@ public class FlatRootPaneUI
 	 * Window border used for non-native window decorations.
 	 */
 	public static class FlatWindowBorder
-		extends BorderUIResource.EmptyBorderUIResource
+		extends FlatEmptyBorder
 	{
 		protected final Color activeBorderColor = UIManager.getColor( "RootPane.activeBorderColor" );
 		protected final Color inactiveBorderColor = UIManager.getColor( "RootPane.inactiveBorderColor" );
@@ -712,7 +722,10 @@ public class FlatRootPaneUI
 		}
 
 		private void paintImpl( Graphics2D g, int x, int y, int width, int height, double scaleFactor ) {
-			g.drawRect( x, y, width - 1, height - 1 );
+			Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
+			float lineWidth = (float) (UIScale.scale( 1f ) * scaleFactor);
+			g.fill( FlatUIUtils.createRectangle( x, y, width, height, lineWidth ) );
+			FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
 		}
 
 		protected boolean isWindowMaximized( Component c ) {

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatScrollBarUI.java

@@ -43,6 +43,7 @@ import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableField;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableLookupProvider;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
@@ -212,14 +213,14 @@ public class FlatScrollBarUI
 			switch( e.getPropertyName() ) {
 				case FlatClientProperties.SCROLL_BAR_SHOW_BUTTONS:
 					scrollbar.revalidate();
-					scrollbar.repaint();
+					HiDPIUtils.repaint( scrollbar );
 					break;
 
 				case FlatClientProperties.STYLE:
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle();
 					scrollbar.revalidate();
-					scrollbar.repaint();
+					HiDPIUtils.repaint( scrollbar );
 					break;
 
 				case "componentOrientation":
@@ -492,7 +493,7 @@ public class FlatScrollBarUI
 
 		private void repaint() {
 			if( scrollbar.isEnabled() )
-				scrollbar.repaint();
+				HiDPIUtils.repaint( scrollbar );
 		}
 	}
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatScrollPaneUI.java

@@ -55,6 +55,7 @@ import javax.swing.plaf.basic.BasicScrollPaneUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -209,7 +210,7 @@ public class FlatScrollPaneUI
 
 			// Use (0, 0) view position to obtain a constant unit increment of first item.
 			// Unit increment may be different for each item.
-			Rectangle visibleRect = new Rectangle( viewport.getViewSize() );
+			Rectangle visibleRect = new Rectangle( viewport.getExtentSize() );
 			unitIncrement = scrollable.getScrollableUnitIncrement( visibleRect, orientation, 1 );
 
 			if( unitIncrement > 0 ) {
@@ -297,11 +298,11 @@ public class FlatScrollPaneUI
 					JScrollBar hsb = scrollpane.getHorizontalScrollBar();
 					if( vsb != null ) {
 						vsb.revalidate();
-						vsb.repaint();
+						HiDPIUtils.repaint( vsb );
 					}
 					if( hsb != null ) {
 						hsb.revalidate();
-						hsb.repaint();
+						HiDPIUtils.repaint( hsb );
 					}
 					break;
 
@@ -321,14 +322,14 @@ public class FlatScrollPaneUI
 					break;
 
 				case FlatClientProperties.OUTLINE:
-					scrollpane.repaint();
+					HiDPIUtils.repaint( scrollpane );
 					break;
 
 				case FlatClientProperties.STYLE:
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle();
 					scrollpane.revalidate();
-					scrollpane.repaint();
+					HiDPIUtils.repaint( scrollpane );
 					break;
 
 				case "border":
@@ -339,7 +340,7 @@ public class FlatScrollPaneUI
 						borderShared = null;
 						installStyle();
 						scrollpane.revalidate();
-						scrollpane.repaint();
+						HiDPIUtils.repaint( scrollpane );
 					}
 					break;
 			}
@@ -538,14 +539,14 @@ public class FlatScrollPaneUI
 		public void focusGained( FocusEvent e ) {
 			// necessary to update focus border
 			if( scrollpane.getBorder() instanceof FlatBorder )
-				scrollpane.repaint();
+				HiDPIUtils.repaint( scrollpane );
 		}
 
 		@Override
 		public void focusLost( FocusEvent e ) {
 			// necessary to update focus border
 			if( scrollpane.getBorder() instanceof FlatBorder )
-				scrollpane.repaint();
+				HiDPIUtils.repaint( scrollpane );
 		}
 	}
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatSeparatorUI.java

@@ -32,6 +32,7 @@ import javax.swing.plaf.basic.BasicSeparatorUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 
 /**
@@ -134,7 +135,7 @@ public class FlatSeparatorUI
 				} else
 					installStyle( s );
 				s.revalidate();
-				s.repaint();
+				HiDPIUtils.repaint( s );
 				break;
 		}
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatSliderUI.java

@@ -25,6 +25,8 @@ import java.awt.Graphics2D;
 import java.awt.Insets;
 import java.awt.Rectangle;
 import java.awt.Shape;
+import java.awt.event.FocusEvent;
+import java.awt.event.FocusListener;
 import java.awt.event.MouseEvent;
 import java.awt.geom.Ellipse2D;
 import java.awt.geom.Path2D;
@@ -191,6 +193,23 @@ public class FlatSliderUI
 		return new FlatTrackListener();
 	}
 
+	@Override
+	protected FocusListener createFocusListener( JSlider slider ) {
+		return new BasicSliderUI.FocusHandler() {
+			@Override
+			public void focusGained( FocusEvent e ) {
+				super.focusGained( e );
+				HiDPIUtils.repaint( slider );
+			}
+
+			@Override
+			public void focusLost( FocusEvent e ) {
+				super.focusLost( e );
+				HiDPIUtils.repaint( slider );
+			}
+		};
+	}
+
 	@Override
 	protected PropertyChangeListener createPropertyChangeListener( JSlider slider ) {
 		return FlatStylingSupport.createPropertyChangeListener( slider, this::installStyle,
@@ -422,7 +441,7 @@ debug*/
 		Color thumbColor, Color thumbBorderColor, Color focusedColor, float thumbBorderWidth, int focusWidth )
 	{
 		double systemScaleFactor = UIScale.getSystemScaleFactor( (Graphics2D) g );
-		if( systemScaleFactor != 1 && systemScaleFactor != 2 ) {
+		if( systemScaleFactor != (int) systemScaleFactor ) {
 			// paint at scale 1x to avoid clipping on right and bottom edges at 125%, 150% or 175%
 			HiDPIUtils.paintAtScale1x( (Graphics2D) g, thumbRect.x, thumbRect.y, thumbRect.width, thumbRect.height,
 				(g2d, x2, y2, width2, height2, scaleFactor) -> {
@@ -579,15 +598,15 @@ debug*/
 
 	@Override
 	public void setThumbLocation( int x, int y ) {
+		// set new thumb location and compute union of old and new thumb bounds
+		Rectangle r = new Rectangle( thumbRect );
+		thumbRect.setLocation( x, y );
+		SwingUtilities.computeUnion( thumbRect.x, thumbRect.y, thumbRect.width, thumbRect.height, r );
+
 		if( !isRoundThumb() ) {
 			// the needle of the directional thumb is painted outside of thumbRect
 			// --> must increase repaint rectangle
 
-			// set new thumb location and compute union of old and new thumb bounds
-			Rectangle r = new Rectangle( thumbRect );
-			thumbRect.setLocation( x, y );
-			SwingUtilities.computeUnion( thumbRect.x, thumbRect.y, thumbRect.width, thumbRect.height, r );
-
 			// increase union rectangle for repaint
 			int extra = (int) Math.ceil( UIScale.scale( focusWidth ) * 0.4142f );
 			if( slider.getOrientation() == JSlider.HORIZONTAL )
@@ -597,10 +616,9 @@ debug*/
 				if( !slider.getComponentOrientation().isLeftToRight() )
 					r.x -= extra;
 			}
+		}
 
-			slider.repaint( r );
+		HiDPIUtils.repaint( slider, r );
-		} else
-			super.setThumbLocation( x, y );
 	}
 
 	//---- class FlatTrackListener --------------------------------------------
@@ -688,21 +706,21 @@ debug*/
 				!UIManager.getBoolean( "Slider.snapToTicksOnReleased" ) )
 			{
 				calculateThumbLocation();
-				slider.repaint();
+				HiDPIUtils.repaint( slider );
 			}
 		}
 
 		protected void setThumbHover( boolean hover ) {
 			if( hover != thumbHover ) {
 				thumbHover = hover;
-				slider.repaint( thumbRect );
+				HiDPIUtils.repaint( slider, thumbRect );
 			}
 		}
 
 		protected void setThumbPressed( boolean pressed ) {
 			if( pressed != thumbPressed ) {
 				thumbPressed = pressed;
-				slider.repaint( thumbRect );
+				HiDPIUtils.repaint( slider, thumbRect );
 			}
 		}
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatSpinnerUI.java

@@ -47,6 +47,7 @@ import javax.swing.plaf.basic.BasicSpinnerUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 
 /**
@@ -139,8 +140,6 @@ public class FlatSpinnerUI
 		buttonHoverArrowColor = UIManager.getColor( "Spinner.buttonHoverArrowColor" );
 		buttonPressedArrowColor = UIManager.getColor( "Spinner.buttonPressedArrowColor" );
 		padding = UIManager.getInsets( "Spinner.padding" );
-
-		MigLayoutVisualPadding.install( spinner );
 	}
 
 	@Override
@@ -161,8 +160,6 @@ public class FlatSpinnerUI
 
 		oldStyleValues = null;
 		borderShared = null;
-
-		MigLayoutVisualPadding.uninstall( spinner );
 	}
 
 	@Override
@@ -172,6 +169,8 @@ public class FlatSpinnerUI
 		addEditorFocusListener( spinner.getEditor() );
 		spinner.addFocusListener( getHandler() );
 		spinner.addPropertyChangeListener( getHandler() );
+
+		MigLayoutVisualPadding.install( spinner );
 	}
 
 	@Override
@@ -183,6 +182,8 @@ public class FlatSpinnerUI
 		spinner.removePropertyChangeListener( getHandler() );
 
 		handler = null;
+
+		MigLayoutVisualPadding.uninstall( spinner );
 	}
 
 	private Handler getHandler() {
@@ -586,7 +587,7 @@ public class FlatSpinnerUI
 		@Override
 		public void focusGained( FocusEvent e ) {
 			// necessary to update focus border
-			spinner.repaint();
+			HiDPIUtils.repaint( spinner );
 
 			// if spinner gained focus, transfer it to the editor text field
 			if( e.getComponent() == spinner ) {
@@ -599,7 +600,7 @@ public class FlatSpinnerUI
 		@Override
 		public void focusLost( FocusEvent e ) {
 			// necessary to update focus border
-			spinner.repaint();
+			HiDPIUtils.repaint( spinner );
 		}
 
 		//---- interface PropertyChangeListener ----
@@ -614,7 +615,7 @@ public class FlatSpinnerUI
 
 				case FlatClientProperties.COMPONENT_ROUND_RECT:
 				case FlatClientProperties.OUTLINE:
-					spinner.repaint();
+					HiDPIUtils.repaint( spinner );
 					break;
 
 				case FlatClientProperties.MINIMUM_WIDTH:
@@ -625,7 +626,7 @@ public class FlatSpinnerUI
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle();
 					spinner.revalidate();
-					spinner.repaint();
+					HiDPIUtils.repaint( spinner );
 					break;
 			}
 		}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatStylingSupport.java

@@ -40,8 +40,8 @@ import javax.swing.UIManager;
 import javax.swing.border.Border;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.StringUtils;
-import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * Support for styling components in CSS syntax.
@@ -324,22 +324,24 @@ public class FlatStylingSupport
 			return null;
 
 		Map<String, Object> oldValues = new HashMap<>();
+		outer:
 		for( Map.Entry<String, Object> e : style.entrySet() ) {
 			String key = e.getKey();
 			Object newValue = e.getValue();
 
 			// handle key prefix
-			if( key.startsWith( "[" ) ) {
+			while( key.startsWith( "[" ) ) {
-				if( (SystemInfo.isWindows && key.startsWith( "[win]" )) ||
+				int closeIndex = key.indexOf( ']' );
-					(SystemInfo.isMacOS && key.startsWith( "[mac]" )) ||
+				if( closeIndex < 0 )
-					(SystemInfo.isLinux && key.startsWith( "[linux]" )) ||
+					continue outer;
-					(key.startsWith( "[light]" ) && !FlatLaf.isLafDark()) ||
+
-					(key.startsWith( "[dark]" ) && FlatLaf.isLafDark()) )
+				String prefix = key.substring( 0, closeIndex + 1 );
-				{
+				String lightOrDarkPrefix = FlatLaf.getUIKeyLightOrDarkPrefix( FlatLaf.isLafDark() );
-					// prefix is known and enabled --> remove prefix
+				if( !lightOrDarkPrefix.equals( prefix ) && !FlatLaf.getUIKeyPlatformPrefixes().contains( prefix ) )
-					key = key.substring( key.indexOf( ']' ) + 1 );
+					continue outer;
-				} else
+
-					continue;
+				// prefix is known and enabled --> remove prefix
+				key = key.substring( closeIndex + 1 );
 			}
 
 			Object oldValue = applyProperty.apply( key, newValue );
@@ -709,7 +711,7 @@ public class FlatStylingSupport
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle.run();
 					c.revalidate();
-					c.repaint();
+					HiDPIUtils.repaint( c );
 					break;
 			}
 		};

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTabbedPaneUI.java

@@ -98,6 +98,7 @@ import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
 import com.formdev.flatlaf.util.Animator;
 import com.formdev.flatlaf.util.CubicBezierEasing;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.JavaCompatibility;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.StringUtils;
@@ -895,7 +896,7 @@ public class FlatTabbedPaneUI
 			}
 		}
 
-		tabPane.repaint( r );
+		HiDPIUtils.repaint( tabPane, r );
 	}
 
 	private boolean inCalculateEqual;
@@ -1684,7 +1685,7 @@ debug*/
 			w - (ci.left / 100f) - (ci.right / 100f), h - (ci.top / 100f) - (ci.bottom / 100f) ), false );
 
 		// add gap for selected tab to path
-		if( getTabType() == TAB_TYPE_CARD ) {
+		if( getTabType() == TAB_TYPE_CARD && selectedIndex >= 0 ) {
 			float csh = scale( (float) contentSeparatorHeight );
 
 			Rectangle tabRect = getTabBounds( tabPane, selectedIndex );
@@ -2305,8 +2306,23 @@ debug*/
 	/** @since 3.4 */
 	@Override
 	public Boolean isTitleBarCaptionAt( int x, int y ) {
-		if( tabForCoordinate( tabPane, x, y ) >= 0 )
+		// Note: not using tabForCoordinate() here because this may validate layout and cause dead lock
-			return false;
+
+		if( moreTabsButton != null ) {
+			// convert x,y from JTabbedPane coordinate space to ScrollableTabPanel coordinate space
+			Point viewPosition = tabViewport.getViewPosition();
+			x = x - tabViewport.getX() + viewPosition.x;
+			y = y - tabViewport.getY() + viewPosition.y;
+
+			// check whether point is within viewport
+			if( !tabViewport.getViewRect().contains( x, y ) )
+				return null; // check children
+		}
+
+		for( int i = 0; i < rects.length; i++ ) {
+			if( rects[i].contains( x, y ) )
+				return false;
+		}
 
 		return null; // check children
 	}
@@ -2581,19 +2597,19 @@ debug*/
 		@Override
 		public void popupMenuWillBecomeVisible( PopupMenuEvent e ) {
 			popupVisible = true;
-			repaint();
+			HiDPIUtils.repaint( this );
 		}
 
 		@Override
 		public void popupMenuWillBecomeInvisible( PopupMenuEvent e ) {
 			popupVisible = false;
-			repaint();
+			HiDPIUtils.repaint( this );
 		}
 
 		@Override
 		public void popupMenuCanceled( PopupMenuEvent e ) {
 			popupVisible = false;
-			repaint();
+			HiDPIUtils.repaint( this );
 		}
 	}
 
@@ -3102,7 +3118,7 @@ debug*/
 
 				case TABBED_PANE_SHOW_TAB_SEPARATORS:
 				case TABBED_PANE_TAB_TYPE:
-					tabPane.repaint();
+					HiDPIUtils.repaint( tabPane );
 					break;
 
 				case TABBED_PANE_SHOW_CONTENT_SEPARATOR:
@@ -3125,14 +3141,14 @@ debug*/
 				case TABBED_PANE_TAB_ICON_PLACEMENT:
 				case TABBED_PANE_TAB_CLOSABLE:
 					tabPane.revalidate();
-					tabPane.repaint();
+					HiDPIUtils.repaint( tabPane );
 					break;
 
 				case TABBED_PANE_LEADING_COMPONENT:
 					uninstallLeadingComponent();
 					installLeadingComponent();
 					tabPane.revalidate();
-					tabPane.repaint();
+					HiDPIUtils.repaint( tabPane );
 					ensureSelectedTabIsVisibleLater();
 					break;
 
@@ -3140,7 +3156,7 @@ debug*/
 					uninstallTrailingComponent();
 					installTrailingComponent();
 					tabPane.revalidate();
-					tabPane.repaint();
+					HiDPIUtils.repaint( tabPane );
 					ensureSelectedTabIsVisibleLater();
 					break;
 
@@ -3148,7 +3164,7 @@ debug*/
 				case STYLE_CLASS:
 					installStyle();
 					tabPane.revalidate();
-					tabPane.repaint();
+					HiDPIUtils.repaint( tabPane );
 					break;
 			}
 		}
@@ -3172,7 +3188,7 @@ debug*/
 				case TABBED_PANE_TAB_ALIGNMENT:
 				case TABBED_PANE_TAB_CLOSABLE:
 					tabPane.revalidate();
-					tabPane.repaint();
+					HiDPIUtils.repaint( tabPane );
 					break;
 			}
 		}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTableCellBorder.java

@@ -65,8 +65,28 @@ public class FlatTableCellBorder
 		return super.getLineColor();
 	}
 
+	@Override
+	public int getArc() {
+		if( c != null ) {
+			Integer selectionArc = getStyleFromTableUI( c, ui -> ui.selectionArc );
+			if( selectionArc != null )
+				return selectionArc;
+		}
+		return super.getArc();
+	}
+
 	@Override
 	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
+		if( c != null ) {
+			Insets selectionInsets = getStyleFromTableUI( c, ui -> ui.selectionInsets );
+			if( selectionInsets != null ) {
+				x += selectionInsets.left;
+				y += selectionInsets.top;
+				width -= selectionInsets.left + selectionInsets.right;
+				height -= selectionInsets.top + selectionInsets.bottom;
+			}
+		}
+
 		this.c = c;
 		super.paintBorder( c, g, x, y, width, height );
 		this.c = null;

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTableHeaderUI.java

@@ -45,6 +45,7 @@ import javax.swing.table.TableColumn;
 import javax.swing.table.TableColumnModel;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -234,8 +235,8 @@ public class FlatTableHeaderUI
 
 	@Override
 	protected void rolloverColumnUpdated( int oldColumn, int newColumn ) {
-		header.repaint( header.getHeaderRect( oldColumn ) );
+		HiDPIUtils.repaint( header, header.getHeaderRect( oldColumn ) );
-		header.repaint( header.getHeaderRect( newColumn ) );
+		HiDPIUtils.repaint( header, header.getHeaderRect( newColumn ) );
 	}
 
 	@Override

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTableUI.java

@@ -24,7 +24,13 @@ import java.awt.EventQueue;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Insets;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.Shape;
 import java.awt.event.ActionEvent;
+import java.awt.event.ComponentAdapter;
+import java.awt.event.ComponentEvent;
+import java.awt.event.ComponentListener;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
 import java.awt.geom.Rectangle2D;
@@ -33,26 +39,35 @@ import java.beans.PropertyChangeListener;
 import java.util.Map;
 import javax.swing.Action;
 import javax.swing.ActionMap;
+import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.JScrollPane;
 import javax.swing.JTable;
 import javax.swing.JTextField;
 import javax.swing.JViewport;
+import javax.swing.ListSelectionModel;
 import javax.swing.LookAndFeel;
 import javax.swing.SwingConstants;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ListSelectionEvent;
+import javax.swing.event.ListSelectionListener;
+import javax.swing.event.TableColumnModelEvent;
+import javax.swing.event.TableColumnModelListener;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicTableUI;
 import javax.swing.table.DefaultTableCellRenderer;
 import javax.swing.table.JTableHeader;
 import javax.swing.table.TableCellRenderer;
+import javax.swing.table.TableColumnModel;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.icons.FlatCheckBoxIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.util.Graphics2DProxy;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
@@ -92,6 +107,8 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Table.intercellSpacing					Dimension
  * @uiDefault Table.selectionInactiveBackground			Color
  * @uiDefault Table.selectionInactiveForeground			Color
+ * @uiDefault Table.selectionInsets						Insets
+ * @uiDefault Table.selectionArc						int
  * @uiDefault Table.paintOutsideAlternateRows			boolean
  * @uiDefault Table.editorSelectAllOnStartEditing		boolean
  *
@@ -120,6 +137,8 @@ public class FlatTableUI
 	@Styleable protected Color selectionForeground;
 	@Styleable protected Color selectionInactiveBackground;
 	@Styleable protected Color selectionInactiveForeground;
+	/** @since 3.5 */ @Styleable protected Insets selectionInsets;
+	/** @since 3.5 */ @Styleable protected int selectionArc;
 
 	// for FlatTableCellBorder
 	/** @since 2 */ @Styleable protected Insets cellMargins;
@@ -132,6 +151,9 @@ public class FlatTableUI
 	private TableCellRenderer oldBooleanRenderer;
 
 	private PropertyChangeListener propertyChangeListener;
+	private ComponentListener outsideAlternateRowsListener;
+	private ListSelectionListener rowSelectionListener;
+	private TableColumnModelListener columnSelectionListener;
 	private Map<String, Object> oldStyleValues;
 
 	public static ComponentUI createUI( JComponent c ) {
@@ -158,6 +180,8 @@ public class FlatTableUI
 		selectionForeground = UIManager.getColor( "Table.selectionForeground" );
 		selectionInactiveBackground = UIManager.getColor( "Table.selectionInactiveBackground" );
 		selectionInactiveForeground = UIManager.getColor( "Table.selectionInactiveForeground" );
+		selectionInsets = UIManager.getInsets( "Table.selectionInsets" );
+		selectionArc = UIManager.getInt( "Table.selectionArc" );
 
 		toggleSelectionColors();
 
@@ -245,6 +269,28 @@ public class FlatTableUI
 
 		propertyChangeListener = e -> {
 			switch( e.getPropertyName() ) {
+				case "selectionModel":
+					if( rowSelectionListener != null ) {
+						Object oldModel = e.getOldValue();
+						Object newModel = e.getNewValue();
+						if( oldModel != null )
+							((ListSelectionModel)oldModel).removeListSelectionListener( rowSelectionListener );
+						if( newModel != null )
+							((ListSelectionModel)newModel).addListSelectionListener( rowSelectionListener );
+					}
+					break;
+
+				case "columnModel":
+					if( columnSelectionListener != null ) {
+						Object oldModel = e.getOldValue();
+						Object newModel = e.getNewValue();
+						if( oldModel != null )
+							((TableColumnModel)oldModel).removeColumnModelListener( columnSelectionListener );
+						if( newModel != null )
+							((TableColumnModel)newModel).addColumnModelListener( columnSelectionListener );
+					}
+					break;
+
 				case FlatClientProperties.COMPONENT_FOCUS_OWNER:
 					toggleSelectionColors();
 					break;
@@ -253,11 +299,14 @@ public class FlatTableUI
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle();
 					table.revalidate();
-					table.repaint();
+					HiDPIUtils.repaint( table );
 					break;
 			}
 		};
 		table.addPropertyChangeListener( propertyChangeListener );
+
+		if( selectionArc > 0 )
+			installRepaintRoundedSelectionListeners();
 	}
 
 	@Override
@@ -266,6 +315,19 @@ public class FlatTableUI
 
 		table.removePropertyChangeListener( propertyChangeListener );
 		propertyChangeListener = null;
+
+		if( outsideAlternateRowsListener != null ) {
+			table.removeComponentListener( outsideAlternateRowsListener );
+			outsideAlternateRowsListener = null;
+		}
+		if( rowSelectionListener != null ) {
+			table.getSelectionModel().removeListSelectionListener( rowSelectionListener );
+			rowSelectionListener = null;
+		}
+		if( columnSelectionListener != null ) {
+			table.getColumnModel().removeColumnModelListener( columnSelectionListener );
+			columnSelectionListener = null;
+		}
 	}
 
 	@Override
@@ -342,6 +404,8 @@ public class FlatTableUI
 	protected Object applyStyleProperty( String key, Object value ) {
 		if( "rowHeight".equals( key ) && value instanceof Integer )
 			value = UIScale.scale( (Integer) value );
+		else if( "selectionArc".equals( key ) && value instanceof Integer && (Integer) value > 0 )
+			installRepaintRoundedSelectionListeners();
 
 		return FlatStylingSupport.applyToAnnotatedObjectOrComponent( this, table, key, value );
 	}
@@ -404,6 +468,7 @@ public class FlatTableUI
 
 			double systemScaleFactor = UIScale.getSystemScaleFactor( (Graphics2D) g );
 			double lineThickness = (1. / systemScaleFactor) * (int) systemScaleFactor;
+			double lineOffset = (1. - lineThickness) + 0.05; // adding 0.05 to fix line location in some cases
 
 			// Java 8 uses drawLine() to paint grid lines
 			// Java 9+ uses fillRect() to paint grid lines (except for dragged column)
@@ -446,11 +511,11 @@ public class FlatTableUI
 					// reduce line thickness to avoid unstable painted line thickness
 					if( lineThickness != 1 ) {
 						if( horizontalLines && height == 1 && wasInvokedFromPaintGrid() ) {
-							super.fill( new Rectangle2D.Double( x, y, width, lineThickness ) );
+							super.fill( new Rectangle2D.Double( x, y + lineOffset, width, lineThickness ) );
 							return;
 						}
 						if( verticalLines && width == 1 && y == 0 && wasInvokedFromPaintGrid() ) {
-							super.fill( new Rectangle2D.Double( x, y, lineThickness, height ) );
+							super.fill( new Rectangle2D.Double( x + lineOffset, y, lineThickness, height ) );
 							return;
 						}
 					}
@@ -468,6 +533,10 @@ public class FlatTableUI
 			};
 		}
 
+		// rounded selection or selection insets
+		if( selectionArc > 0 || (selectionInsets != null && !FlatUIUtils.isInsetsEmpty( selectionInsets )) )
+			g = new RoundedSelectionGraphics( g, UIManager.getColor( "Table.alternateRowColor" ) );
+
 		super.paint( g, c );
 	}
 
@@ -513,8 +582,6 @@ public class FlatTableUI
 		boolean paintOutside = UIManager.getBoolean( "Table.paintOutsideAlternateRows" );
 		Color alternateColor;
 		if( paintOutside && (alternateColor = UIManager.getColor( "Table.alternateRowColor" )) != null ) {
-			g.setColor( alternateColor );
-
 			int rowCount = table.getRowCount();
 
 			// paint alternating empty rows below the table
@@ -523,10 +590,350 @@ public class FlatTableUI
 				int tableWidth = table.getWidth();
 				int rowHeight = table.getRowHeight();
 
+				g.setColor( alternateColor );
+
+				int x = viewport.getComponentOrientation().isLeftToRight() ? 0 : viewportWidth - tableWidth;
 				for( int y = tableHeight, row = rowCount; y < viewportHeight; y += rowHeight, row++ ) {
 					if( row % 2 != 0 )
-						g.fillRect( 0, y, tableWidth, rowHeight );
+						paintAlternateRowBackground( g, -1, -1, x, y, tableWidth, rowHeight );
 				}
+
+				// add listener on demand
+				if( outsideAlternateRowsListener == null && table.getAutoResizeMode() == JTable.AUTO_RESIZE_OFF ) {
+					outsideAlternateRowsListener = new FlatOutsideAlternateRowsListener();
+					table.addComponentListener( outsideAlternateRowsListener );
+				}
+			}
+		}
+	}
+
+	/**
+	 * Paints (rounded) alternate row background.
+	 * Supports {@link #selectionArc} and {@link #selectionInsets}.
+	 * <p>
+	 * <b>Note:</b> This method is only invoked if either selection arc
+	 *              is greater than zero or if selection insets are not empty.
+	 *
+	 * @since 3.5
+	 */
+	protected void paintAlternateRowBackground( Graphics g, int row, int column, int x, int y, int width, int height ) {
+		Insets insets = (selectionInsets != null) ? (Insets) selectionInsets.clone() : null;
+		float arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight;
+		arcTopLeft = arcTopRight = arcBottomLeft = arcBottomRight = UIScale.scale( selectionArc / 2f );
+
+		if( column >= 0 ) {
+			// selection insets
+
+			// selection arc
+			if( column > 0 ) {
+				if( insets != null )
+					insets.left = 0;
+
+				if( table.getComponentOrientation().isLeftToRight() )
+					arcTopLeft = arcBottomLeft = 0;
+				else
+					arcTopRight = arcBottomRight = 0;
+			}
+			if( column < table.getColumnCount() - 1 ) {
+				if( insets != null )
+					insets.right = 0;
+
+				if( table.getComponentOrientation().isLeftToRight() )
+					arcTopRight = arcBottomRight = 0;
+				else
+					arcTopLeft = arcBottomLeft = 0;
+			}
+		}
+
+		FlatUIUtils.paintSelection( (Graphics2D) g, x, y, width, height,
+			UIScale.scale( insets ), arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight, 0 );
+	}
+
+	/**
+	 * Paints (rounded) cell selection.
+	 * Supports {@link #selectionArc} and {@link #selectionInsets}.
+	 * <p>
+	 * <b>Note:</b> This method is only invoked if either selection arc
+	 *              is greater than zero or if selection insets are not empty.
+	 *
+	 * @since 3.5
+	 */
+	protected void paintCellSelection( Graphics g, int row, int column, int x, int y, int width, int height ) {
+		boolean rowSelAllowed = table.getRowSelectionAllowed();
+		boolean colSelAllowed = table.getColumnSelectionAllowed();
+		boolean rowSelOnly = rowSelAllowed && !colSelAllowed;
+		boolean colSelOnly = colSelAllowed && !rowSelAllowed;
+		boolean cellOnlySel = rowSelAllowed && colSelAllowed;
+
+		// get selection state of surrounding cells
+		boolean leftSelected    = (column > 0 && (rowSelOnly || table.isCellSelected( row, column - 1 )));
+		boolean topSelected     = (row    > 0 && (colSelOnly || table.isCellSelected( row - 1, column )));
+		boolean rightSelected   = (column < table.getColumnCount() - 1 && (rowSelOnly || table.isCellSelected( row, column + 1 )));
+		boolean bottomSelected  = (row    < table.getRowCount() - 1    && (colSelOnly || table.isCellSelected( row + 1, column )));
+		if( !table.getComponentOrientation().isLeftToRight() ) {
+			boolean temp = leftSelected;
+			leftSelected = rightSelected;
+			rightSelected = temp;
+		}
+
+		// selection insets
+		// (insets are applied to whole row if row-only selection is used,
+		//  or to whole column if column-only selection is used,
+		//  or to cell if cell selection is used)
+		Insets insets = (selectionInsets != null) ? (Insets) selectionInsets.clone() : null;
+		if( insets != null ) {
+			if( rowSelOnly && leftSelected )
+				insets.left = 0;
+			if( rowSelOnly && rightSelected )
+				insets.right = 0;
+			if( colSelOnly && topSelected )
+				insets.top = 0;
+			if( colSelOnly && bottomSelected )
+				insets.bottom = 0;
+		}
+
+		// selection arc
+		float arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight;
+		arcTopLeft = arcTopRight = arcBottomLeft = arcBottomRight = UIScale.scale( selectionArc / 2f );
+		if( selectionArc > 0 ) {
+			// note that intercellSpacing is not considered as a gap because
+			// grid lines are usually painted to intercell space
+			boolean hasRowGap = (rowSelOnly || cellOnlySel) && insets != null && (insets.top != 0 || insets.bottom != 0);
+			boolean hasColGap = (colSelOnly || cellOnlySel) && insets != null && (insets.left != 0 || insets.right != 0);
+
+			if( leftSelected && !hasColGap )
+				arcTopLeft = arcBottomLeft = 0;
+			if( rightSelected && !hasColGap )
+				arcTopRight = arcBottomRight = 0;
+			if( topSelected && !hasRowGap )
+				arcTopLeft = arcTopRight = 0;
+			if( bottomSelected && !hasRowGap )
+				arcBottomLeft = arcBottomRight = 0;
+		}
+
+		FlatUIUtils.paintSelection( (Graphics2D) g, x, y, width, height,
+			UIScale.scale( insets ), arcTopLeft, arcTopRight, arcBottomLeft, arcBottomRight, 0 );
+	}
+
+	/**
+	 * Paints a cell selection at the given coordinates.
+	 * The selection color must be set on the graphics context.
+	 * <p>
+	 * This method is intended for use in custom cell renderers to support
+	 * {@link #selectionArc} and {@link #selectionInsets}.
+	 *
+	 * @since 3.5
+	 */
+	public static void paintCellSelection( JTable table, Graphics g, int row, int column, int x, int y, int width, int height ) {
+		if( !(table.getUI() instanceof FlatTableUI) )
+			return;
+
+		FlatTableUI ui = (FlatTableUI) table.getUI();
+		ui.paintCellSelection( g, row, column, x, y, width, height );
+	}
+
+	private void installRepaintRoundedSelectionListeners() {
+		if( rowSelectionListener == null ) {
+			rowSelectionListener = this::repaintRoundedRowSelection;
+			table.getSelectionModel().addListSelectionListener( rowSelectionListener );
+		}
+
+		if( columnSelectionListener == null ) {
+			columnSelectionListener = new TableColumnModelListener() {
+				@Override
+				public void columnSelectionChanged( ListSelectionEvent e ) {
+					repaintRoundedColumnSelection( e );
+				}
+				@Override public void columnRemoved( TableColumnModelEvent e ) {}
+				@Override public void columnMoved( TableColumnModelEvent e ) {}
+				@Override public void columnMarginChanged( ChangeEvent e ) {}
+				@Override public void columnAdded( TableColumnModelEvent e ) {}
+			};
+			table.getColumnModel().addColumnModelListener( columnSelectionListener );
+		}
+	}
+
+	private void repaintRoundedRowSelection( ListSelectionEvent e ) {
+		if( selectionArc <= 0 || !table.getRowSelectionAllowed() )
+			return;
+
+		int rowCount = table.getRowCount();
+		int columnCount = table.getColumnCount();
+		if( rowCount <= 0 || columnCount <= 0 )
+			return;
+
+		// repaint including rows before and after changed selection
+		int firstRow = Math.max( 0, Math.min( e.getFirstIndex() - 1, rowCount - 1 ) );
+		int lastRow = Math.max( 0, Math.min( e.getLastIndex() + 1, rowCount - 1 ) );
+		Rectangle firstRect = table.getCellRect( firstRow, 0, false );
+		Rectangle lastRect = table.getCellRect( lastRow, columnCount - 1, false );
+		table.repaint( firstRect.union( lastRect ) );
+	}
+
+	private void repaintRoundedColumnSelection( ListSelectionEvent e ) {
+		if( selectionArc <= 0 || !table.getColumnSelectionAllowed() )
+			return;
+
+		int rowCount = table.getRowCount();
+		int columnCount = table.getColumnCount();
+		if( rowCount <= 0 || columnCount <= 0 )
+			return;
+
+		// limit to selected rows for cell selection
+		int firstRow = 0;
+		int lastRow = rowCount - 1;
+		if( table.getRowSelectionAllowed() ) {
+			firstRow = table.getSelectionModel().getMinSelectionIndex();
+			lastRow = table.getSelectionModel().getMaxSelectionIndex();
+		}
+
+		// repaint including columns before and after changed selection
+		int firstColumn = Math.max( 0, Math.min( e.getFirstIndex() - 1, columnCount - 1 ) );
+		int lastColumn = Math.max( 0, Math.min( e.getLastIndex() + 1, columnCount - 1 ) );
+		Rectangle firstRect = table.getCellRect( firstRow, firstColumn, false );
+		Rectangle lastRect = table.getCellRect( lastRow, lastColumn, false );
+		table.repaint( firstRect.union( lastRect ) );
+	}
+
+	//---- class RoundedSelectionGraphics -------------------------------------
+
+	/**
+	 * Because selection painting is done in the cell renderer, it would be
+	 * necessary to require a FlatLaf specific renderer to implement rounded selection.
+	 * Using a LaF specific renderer was avoided because often a custom renderer is
+	 * already used in applications. Then either the rounded selection is not used,
+	 * or the application has to be changed to extend a FlatLaf renderer.
+	 * <p>
+	 * To solve this, a graphics proxy is used that paints rounded selection
+	 * if row/column/cell is selected and the renderer wants to fill the background.
+	 */
+	private class RoundedSelectionGraphics
+		extends Graphics2DProxy
+	{
+		private final Color alternateRowColor;
+
+		// used to avoid endless loop in case that paintCellSelection() invokes
+		// g.fillRect() with full bounds (selectionInsets is 0,0,0,0)
+		private boolean inPaintSelection;
+
+		RoundedSelectionGraphics( Graphics delegate, Color alternateRowColor ) {
+			super( (Graphics2D) delegate );
+			this.alternateRowColor = alternateRowColor;
+		}
+
+		@Override
+		public Graphics create() {
+			return new RoundedSelectionGraphics( super.create(), alternateRowColor );
+		}
+
+		@Override
+		public Graphics create( int x, int y, int width, int height ) {
+			return new RoundedSelectionGraphics( super.create( x, y, width, height ), alternateRowColor );
+		}
+
+		@Override
+		public void fillRect( int x, int y, int width, int height ) {
+			if( fillCellSelection( x, y, width, height ) )
+				return;
+
+			super.fillRect( x, y, width, height );
+		}
+
+		@Override
+		public void fill( Shape shape ) {
+			if( shape instanceof Rectangle2D ) {
+				Rectangle2D r = (Rectangle2D) shape;
+				double x = r.getX();
+				double y = r.getY();
+				double width = r.getWidth();
+				double height = r.getHeight();
+				if( x == (int) x && y == (int) y && width == (int) width && height == (int) height ) {
+					if( fillCellSelection( (int) x, (int) y, (int) width, (int) height ) )
+						return;
+				}
+			}
+
+			super.fill( shape );
+		}
+
+		private boolean fillCellSelection( int x, int y, int width, int height ) {
+			if( inPaintSelection )
+				return false;
+
+			Color color;
+			Component rendererComponent;
+			if( x == 0 && y == 0 &&
+				((color = getColor()) == table.getSelectionBackground() ||
+				 (alternateRowColor != null && color == alternateRowColor)) &&
+				(rendererComponent = findActiveRendererComponent()) != null &&
+				width == rendererComponent.getWidth() &&
+				height == rendererComponent.getHeight() )
+			{
+				Point location = rendererComponent.getLocation();
+				int row = table.rowAtPoint( location );
+				int column = table.columnAtPoint( location );
+				if( row >= 0 && column >= 0 ) {
+					inPaintSelection = true;
+					if( color == table.getSelectionBackground() )
+						paintCellSelection( this, row, column, x, y, width, height );
+					else
+						paintAlternateRowBackground( this, row, column, x, y, width, height );
+					inPaintSelection = false;
+
+					return true;
+				}
+			}
+			return false;
+		}
+
+		/**
+		 * A CellRendererPane may contain multiple components, if multiple renderers
+		 * are used. Inactive renderer components have size {@code 0x0}.
+		 */
+		private Component findActiveRendererComponent() {
+			int count = rendererPane.getComponentCount();
+			for( int i = 0; i < count; i++ ) {
+				Component c = rendererPane.getComponent( i );
+				if( c.getWidth() > 0 && c.getHeight() > 0 )
+					return c;
+			}
+			return null;
+		}
+	}
+
+	//---- class OutsideAlternateRowsListener ---------------------------------
+
+	/**
+	 * Used if table auto-resize-mode is off to repaint outside alternate rows
+	 * when table width changed (column resized) or component orientation changed.
+	 */
+	private class FlatOutsideAlternateRowsListener
+		extends ComponentAdapter
+	{
+		@Override
+		public void componentHidden( ComponentEvent e ) {
+			Container viewport = SwingUtilities.getUnwrappedParent( table );
+			if( viewport instanceof JViewport )
+				HiDPIUtils.repaint( viewport );
+		}
+
+		@Override
+		public void componentMoved( ComponentEvent e ) {
+			repaintAreaBelowTable();
+		}
+
+		@Override
+		public void componentResized( ComponentEvent e ) {
+			repaintAreaBelowTable();
+		}
+
+		private void repaintAreaBelowTable() {
+			Container viewport = SwingUtilities.getUnwrappedParent( table );
+			if( viewport instanceof JViewport ) {
+				int viewportHeight = viewport.getHeight();
+				int tableHeight = table.getHeight();
+				if( tableHeight < viewportHeight )
+					HiDPIUtils.repaint( viewport, 0, tableHeight, viewport.getWidth(), viewportHeight - tableHeight );
 			}
 		}
 	}
@@ -583,12 +990,14 @@ public class FlatTableUI
 
 		FlatBooleanRenderer() {
 			setHorizontalAlignment( SwingConstants.CENTER );
-			setIcon( new FlatCheckBoxIcon() {
+			Icon icon = new FlatCheckBoxIcon() {
 				@Override
 				protected boolean isSelected( Component c ) {
 					return selected;
 				}
-			} );
+			};
+			setIcon( icon );
+			setDisabledIcon( icon );
 		}
 
 		@Override

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTextFieldUI.java

@@ -174,8 +174,6 @@ public class FlatTextFieldUI
 		defaultMargin = UIManager.getInsets( prefix + ".margin" );
 
 		LookAndFeel.installProperty( getComponent(), "opaque", false );
-
-		MigLayoutVisualPadding.install( getComponent() );
 	}
 
 	@Override
@@ -193,8 +191,6 @@ public class FlatTextFieldUI
 
 		oldStyleValues = null;
 		borderShared = null;
-
-		MigLayoutVisualPadding.uninstall( getComponent() );
 	}
 
 	@Override
@@ -204,6 +200,8 @@ public class FlatTextFieldUI
 		// necessary to update focus border and background
 		focusListener = new FlatUIUtils.RepaintFocusListener( getComponent(), null );
 		getComponent().addFocusListener( focusListener );
+
+		MigLayoutVisualPadding.install( getComponent() );
 	}
 
 	@Override
@@ -217,6 +215,8 @@ public class FlatTextFieldUI
 			getComponent().getDocument().removeDocumentListener( documentListener );
 			documentListener = null;
 		}
+
+		MigLayoutVisualPadding.uninstall( getComponent() );
 	}
 
 	@Override
@@ -239,7 +239,7 @@ public class FlatTextFieldUI
 			case COMPONENT_ROUND_RECT:
 			case OUTLINE:
 			case TEXT_FIELD_PADDING:
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case MINIMUM_WIDTH:
@@ -250,38 +250,38 @@ public class FlatTextFieldUI
 			case STYLE_CLASS:
 				installStyle();
 				c.revalidate();
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case TEXT_FIELD_LEADING_ICON:
 				leadingIcon = (e.getNewValue() instanceof Icon) ? (Icon) e.getNewValue() : null;
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case TEXT_FIELD_TRAILING_ICON:
 				trailingIcon = (e.getNewValue() instanceof Icon) ? (Icon) e.getNewValue() : null;
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case TEXT_FIELD_LEADING_COMPONENT:
 				uninstallLeadingComponent();
 				installLeadingComponent();
 				c.revalidate();
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case TEXT_FIELD_TRAILING_COMPONENT:
 				uninstallTrailingComponent();
 				installTrailingComponent();
 				c.revalidate();
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case TEXT_FIELD_SHOW_CLEAR_BUTTON:
 				uninstallClearButton();
 				installClearButton();
 				c.revalidate();
-				c.repaint();
+				HiDPIUtils.repaint( c );
 				break;
 
 			case "enabled":
@@ -815,7 +815,7 @@ debug*/
 		if( visible != clearButton.isVisible() ) {
 			clearButton.setVisible( visible );
 			c.revalidate();
-			c.repaint();
+			HiDPIUtils.repaint( c );
 		}
 	}
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTitlePane.java

@@ -33,7 +33,6 @@ import java.awt.Image;
 import java.awt.Insets;
 import java.awt.Point;
 import java.awt.Rectangle;
-import java.awt.Toolkit;
 import java.awt.Window;
 import java.awt.event.ActionListener;
 import java.awt.event.ComponentAdapter;
@@ -90,13 +89,16 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault TitlePane.iconSize							Dimension
  * @uiDefault TitlePane.iconMargins							Insets
  * @uiDefault TitlePane.titleMargins						Insets
- * @uiDefault TitlePane.menuBarEmbedded						boolean
  * @uiDefault TitlePane.titleMinimumWidth					int
  * @uiDefault TitlePane.buttonMinimumWidth					int
  * @uiDefault TitlePane.buttonMaximizedHeight				int
+ * @uiDefault TitlePane.buttonsGap							int
+ * @uiDefault TitlePane.buttonsMargins						Insets
+ * @uiDefault TitlePane.buttonsFillVertically				boolean
  * @uiDefault TitlePane.centerTitle							boolean
  * @uiDefault TitlePane.centerTitleIfMenuBarEmbedded		boolean
  * @uiDefault TitlePane.showIconBesideTitle					boolean
+ * @uiDefault TitlePane.menuBarEmbedded						boolean
  * @uiDefault TitlePane.menuBarTitleGap						int
  * @uiDefault TitlePane.menuBarTitleMinimumGap				int
  * @uiDefault TitlePane.closeIcon							Icon
@@ -124,9 +126,14 @@ public class FlatTitlePane
 	/** @since 2.5 */ protected final boolean showIconInDialogs;
 	/** @since 2 */ protected final int noIconLeftGap;
 	protected final Dimension iconSize;
+	/** @since 3.6 */ protected final Insets iconMargins;
+	/** @since 3.6 */ protected final Insets titleMargins;
 	/** @since 2.4 */ protected final int titleMinimumWidth;
 	/** @since 2.4 */ protected final int buttonMinimumWidth;
 	protected final int buttonMaximizedHeight;
+	/** @since 3.6 */ protected final int buttonsGap;
+	/** @since 3.6 */ protected final Insets buttonsMargins;
+	/** @since 3.6 */ protected final boolean buttonsFillVertically;
 	protected final boolean centerTitle;
 	protected final boolean centerTitleIfMenuBarEmbedded;
 	/** @since 2.4 */ protected final boolean showIconBesideTitle;
@@ -146,6 +153,9 @@ public class FlatTitlePane
 	protected JButton restoreButton;
 	protected JButton closeButton;
 
+	private JComponent iconifyMaximizeGapComp;
+	private JComponent maximizeCloseGapComp;
+
 	protected Window window;
 
 	private final Handler handler;
@@ -180,9 +190,7 @@ public class FlatTitlePane
 	public FlatTitlePane( JRootPane rootPane ) {
 		this.rootPane = rootPane;
 
-		Window w = SwingUtilities.getWindowAncestor( rootPane );
+		windowStyle = getWindowStyle( rootPane );
-		String defaultWindowStyle = (w != null && w.getType() == Window.Type.UTILITY) ? WINDOW_STYLE_SMALL : null;
-		windowStyle = clientProperty( rootPane, WINDOW_STYLE, defaultWindowStyle, String.class );
 
 		titleFont = FlatUIUtils.getSubUIFont( "TitlePane.font", windowStyle );
 		activeBackground = FlatUIUtils.getSubUIColor( "TitlePane.background", windowStyle );
@@ -197,9 +205,14 @@ public class FlatTitlePane
 		showIconInDialogs = FlatUIUtils.getSubUIBoolean( "TitlePane.showIconInDialogs", windowStyle, true );
 		noIconLeftGap = FlatUIUtils.getSubUIInt( "TitlePane.noIconLeftGap", windowStyle, 8 );
 		iconSize = FlatUIUtils.getSubUIDimension( "TitlePane.iconSize", windowStyle );
+		iconMargins = FlatUIUtils.getSubUIInsets( "TitlePane.iconMargins", windowStyle );
+		titleMargins = FlatUIUtils.getSubUIInsets( "TitlePane.titleMargins", windowStyle );
 		titleMinimumWidth = FlatUIUtils.getSubUIInt( "TitlePane.titleMinimumWidth", windowStyle, 60 );
 		buttonMinimumWidth = FlatUIUtils.getSubUIInt( "TitlePane.buttonMinimumWidth", windowStyle, 30 );
 		buttonMaximizedHeight = FlatUIUtils.getSubUIInt( "TitlePane.buttonMaximizedHeight", windowStyle, 0 );
+		buttonsGap = FlatUIUtils.getSubUIInt( "TitlePane.buttonsGap", windowStyle, 0 );
+		buttonsMargins = FlatUIUtils.getSubUIInsets( "TitlePane.buttonsMargins", windowStyle );
+		buttonsFillVertically = FlatUIUtils.getSubUIBoolean( "TitlePane.buttonsFillVertically", windowStyle, true );
 		centerTitle = FlatUIUtils.getSubUIBoolean( "TitlePane.centerTitle", windowStyle, false );
 		centerTitleIfMenuBarEmbedded = FlatUIUtils.getSubUIBoolean( "TitlePane.centerTitleIfMenuBarEmbedded", windowStyle, true );
 		showIconBesideTitle = FlatUIUtils.getSubUIBoolean( "TitlePane.showIconBesideTitle", windowStyle, false );
@@ -222,13 +235,19 @@ public class FlatTitlePane
 			windowTopBorderLayer = new JPanel();
 			windowTopBorderLayer.setVisible( false );
 			windowTopBorderLayer.setOpaque( false );
-			windowTopBorderLayer.setBorder( FlatUIUtils.nonUIResource( FlatNativeWindowBorder.WindowTopBorder.getInstance() ) );
+			windowTopBorderLayer.setBorder( FlatUIUtils.nonUIResource( WindowTopBorder.getInstance() ) );
 		} else
 			windowTopBorderLayer = null;
 
 		applyComponentOrientation( rootPane.getComponentOrientation() );
 	}
 
+	static String getWindowStyle( JRootPane rootPane ) {
+		Window w = SwingUtilities.getWindowAncestor( rootPane );
+		String defaultWindowStyle = (w != null && w.getType() == Window.Type.UTILITY) ? WINDOW_STYLE_SMALL : null;
+		return clientProperty( rootPane, WINDOW_STYLE, defaultWindowStyle, String.class );
+	}
+
 	protected FlatTitlePaneBorder createTitlePaneBorder() {
 		return new FlatTitlePaneBorder();
 	}
@@ -246,8 +265,8 @@ public class FlatTitlePane
 				setUI( new FlatTitleLabelUI() );
 			}
 		};
-		iconLabel.setBorder( new FlatEmptyBorder( FlatUIUtils.getSubUIInsets( "TitlePane.iconMargins", windowStyle ) ) );
+		iconLabel.setBorder( new FlatEmptyBorder( iconMargins ) );
-		titleLabel.setBorder( new FlatEmptyBorder( FlatUIUtils.getSubUIInsets( "TitlePane.titleMargins", windowStyle ) ) );
+		titleLabel.setBorder( new FlatEmptyBorder( titleMargins ) );
 
 		leftPanel.setLayout( new BoxLayout( leftPanel, BoxLayout.LINE_AXIS ) );
 		leftPanel.setOpaque( false );
@@ -350,23 +369,33 @@ public class FlatTitlePane
 		restoreButton = createButton( "TitlePane.restoreIcon", "Restore", e -> restore() );
 		closeButton = createButton( "TitlePane.closeIcon", "Close", e -> close() );
 
+		iconifyMaximizeGapComp = createButtonsGapComp();
+		maximizeCloseGapComp = createButtonsGapComp();
+
 		// initially hide buttons that are only supported in frames
 		iconifyButton.setVisible( false );
 		maximizeButton.setVisible( false );
 		restoreButton.setVisible( false );
+		iconifyMaximizeGapComp.setVisible( false );
+		maximizeCloseGapComp.setVisible( false );
 
 		buttonPanel = new JPanel() {
 			@Override
 			public Dimension getPreferredSize() {
 				Dimension size = super.getPreferredSize();
+				int titleBarHeight = clientPropertyInt( rootPane, TITLE_BAR_HEIGHT, -1 );
+				if( titleBarHeight >= 0 )
+					return new Dimension( size.width, UIScale.scale( titleBarHeight ) );
+
 				if( buttonMaximizedHeight > 0 && isWindowMaximized() && !hasVisibleEmbeddedMenuBar( rootPane.getJMenuBar() ) ) {
 					// make title pane height smaller when frame is maximized
-					size = new Dimension( size.width, Math.min( size.height, UIScale.scale( buttonMaximizedHeight ) ) );
+					size = new Dimension( size.width, Math.min( size.height, UIScale.scale( buttonMaximizedHeight + buttonsMargins.top + buttonsMargins.bottom ) ) );
 				}
 				return size;
 			}
 		};
 		buttonPanel.setOpaque( false );
+		buttonPanel.setBorder( FlatUIUtils.nonUIResource( new FlatEmptyBorder( buttonsMargins ) ) );
 		buttonPanel.setLayout( new BoxLayout( buttonPanel, BoxLayout.LINE_AXIS ) );
 		if( rootPane.getWindowDecorationStyle() == JRootPane.FRAME ) {
 			// JRootPane.FRAME works only for frames (and not for dialogs)
@@ -375,8 +404,10 @@ public class FlatTitlePane
 			// later in frameStateChanged(), which is invoked from addNotify()
 
 			buttonPanel.add( iconifyButton );
+			buttonPanel.add( iconifyMaximizeGapComp );
 			buttonPanel.add( maximizeButton );
 			buttonPanel.add( restoreButton );
+			buttonPanel.add( maximizeCloseGapComp );
 		}
 		buttonPanel.add( closeButton );
 
@@ -393,7 +424,17 @@ public class FlatTitlePane
 			@Override
 			public Dimension getMinimumSize() {
 				// allow the button to shrink if space is rare
-				return new Dimension( UIScale.scale( buttonMinimumWidth ), super.getMinimumSize().height );
+				return new Dimension(
+					Math.min( UIScale.scale( buttonMinimumWidth ), super.getPreferredSize().width ),
+					super.getMinimumSize().height );
+			}
+			@Override
+			public Dimension getMaximumSize() {
+				// allow the button to fill whole button area height
+				// see also BasicMenuUI.getMaximumSize()
+				return buttonsFillVertically
+					? new Dimension( super.getMaximumSize().width, Short.MAX_VALUE )
+					: super.getMaximumSize();
 			}
 		};
 		button.setFocusable( false );
@@ -404,6 +445,14 @@ public class FlatTitlePane
 		return button;
 	}
 
+	private JComponent createButtonsGapComp() {
+		JComponent gapComp = new JPanel();
+		gapComp.setOpaque( false );
+		gapComp.setMinimumSize( new Dimension( 0, 0 ) );
+		gapComp.setPreferredSize( new Dimension( UIScale.scale( buttonsGap ), 0 ) );
+		return gapComp;
+	}
+
 	protected void activeChanged( boolean active ) {
 		Color background = clientPropertyColor( rootPane, TITLE_BAR_BACKGROUND, null );
 		Color foreground = clientPropertyColor( rootPane, TITLE_BAR_FOREGROUND, null );
@@ -425,6 +474,9 @@ public class FlatTitlePane
 		closeButton.setForeground( foreground );
 
 		// this is necessary because hover/pressed colors are derived from background color
+		// (since FlatWindowAbstractIcon now invokes FlatTitlePane.getBackground()
+		//  to get base color, this is no longer necessary, but keep it for compatibility;
+		//  e.g. for custom window icons)
 		iconifyButton.setBackground( background );
 		maximizeButton.setBackground( background );
 		restoreButton.setBackground( background );
@@ -484,6 +536,13 @@ public class FlatTitlePane
 			maximizeButton.setVisible( false );
 			restoreButton.setVisible( false );
 		}
+
+		boolean iconifyVisible = iconifyButton.isVisible();
+		boolean maximizeVisible = maximizeButton.isVisible();
+		boolean restoreVisible = restoreButton.isVisible();
+		boolean closeVisible = closeButton.isVisible();
+		iconifyMaximizeGapComp.setVisible( iconifyVisible && (maximizeVisible || restoreVisible || closeVisible) );
+		maximizeCloseGapComp.setVisible( closeVisible && (maximizeVisible || restoreVisible) );
 	}
 
 	protected void updateIcon() {
@@ -737,22 +796,17 @@ public class FlatTitlePane
 		if( isFullWindowContent() )
 			return;
 
-		// not storing value of "TitlePane.unifiedBackground" in class to allow changing at runtime
+		g.setColor( getBackground() );
-		g.setColor( (UIManager.getBoolean( "TitlePane.unifiedBackground" ) &&
-				clientPropertyColor( rootPane, TITLE_BAR_BACKGROUND, null ) == null)
-			? FlatUIUtils.getParentBackground( this )
-			: getBackground() );
 		g.fillRect( 0, 0, getWidth(), getHeight() );
 	}
 
-	protected void repaintWindowBorder() {
+	@Override
-		int width = rootPane.getWidth();
+	public Color getBackground() {
-		int height = rootPane.getHeight();
+		// not storing value of "TitlePane.unifiedBackground" in class to allow changing at runtime
-		Insets insets = rootPane.getInsets();
+		return (UIManager.getBoolean( "TitlePane.unifiedBackground" ) &&
-		rootPane.repaint( 0, 0, width, insets.top ); // top
+				clientPropertyColor( rootPane, TITLE_BAR_BACKGROUND, null ) == null)
-		rootPane.repaint( 0, 0, insets.left, height ); // left
+			? FlatUIUtils.getParentBackground( this )
-		rootPane.repaint( 0, height - insets.bottom, width, insets.bottom ); // bottom
+			: super.getBackground();
-		rootPane.repaint( width - insets.right, 0, insets.right, height ); // right
 	}
 
 	/**
@@ -824,7 +878,8 @@ public class FlatTitlePane
 		Rectangle oldMaximizedBounds = frame.getMaximizedBounds();
 		if( !hasNativeCustomDecoration() &&
 			(oldMaximizedBounds == null ||
-			 Objects.equals( oldMaximizedBounds, rootPane.getClientProperty( "_flatlaf.maximizedBounds" ) )) )
+			 Objects.equals( oldMaximizedBounds, rootPane.getClientProperty( "_flatlaf.maximizedBounds" ) )) &&
+			window.getGraphicsConfiguration() != null )
 		{
 			GraphicsConfiguration gc = window.getGraphicsConfiguration();
 
@@ -859,7 +914,7 @@ public class FlatTitlePane
 			// screen insets are in physical size, except for Java 15+
 			// (see https://bugs.openjdk.java.net/browse/JDK-8243925)
 			// and except for Java 8 on secondary screens where primary screen is scaled
-			Insets screenInsets = window.getToolkit().getScreenInsets( gc );
+			Insets screenInsets = FlatUIUtils.getScreenInsets( gc );
 
 			// maximized bounds are required in physical size, except for Java 15+
 			// (see https://bugs.openjdk.java.net/browse/JDK-8231564 and
@@ -1058,10 +1113,11 @@ public class FlatTitlePane
 	 * <p>
 	 * Note:
 	 * <ul>
-	 *   <li>This method is invoked often when mouse is moved over title bar
+	 *   <li>This method is invoked often when mouse is moved over window title bar area
 	 *       and should therefore return quickly.
 	 *   <li>This method is invoked on 'AWT-Windows' thread (not 'AWT-EventQueue' thread)
 	 *       while processing Windows messages.
+	 *       It <b>must not</b> change any component property or layout because this could cause a dead lock.
 	 * </ul>
 	 */
 	private boolean captionHitTest( Point pt ) {
@@ -1089,9 +1145,10 @@ public class FlatTitlePane
 	}
 
 	private boolean isTitleBarCaptionAt( Component c, int x, int y ) {
-		if( !c.isDisplayable() || !c.isVisible() || !c.contains( x, y ) || c == mouseLayer )
+		if( !c.isDisplayable() || !c.isVisible() || !contains( c, x, y ) || c == mouseLayer )
 			return true; // continue checking with next component
 
+		// check enabled component that has mouse listeners
 		if( c.isEnabled() &&
 			(c.getMouseListeners().length > 0 ||
 			 c.getMouseMotionListeners().length > 0) )
@@ -1107,8 +1164,18 @@ public class FlatTitlePane
 			// if component is not fully layouted, do not invoke function
 			// because it is too dangerous that the function tries to layout the component,
 			// which could cause a dead lock
-			if( !c.isValid() )
+			if( !c.isValid() ) {
+				// revalidate if necessary so that it is valid when invoked again later
+				EventQueue.invokeLater( () -> {
+					Window w = SwingUtilities.windowForComponent( c );
+					if( w != null )
+						w.revalidate();
+					else
+						c.revalidate();
+				} );
+
 				return false; // assume that this is not a caption because the component has mouse listeners
+			}
 
 			if( caption instanceof Function ) {
 				// check client property function value
@@ -1141,6 +1208,16 @@ public class FlatTitlePane
 		return true;
 	}
 
+	/**
+	 * Same as {@link Component#contains(int, int)}, but not using that method
+	 * because it may be overridden by custom components and invoke code that
+	 * tries to request AWT tree lock on 'AWT-Windows' thread.
+	 * This could freeze the application if AWT tree is already locked on 'AWT-EventQueue' thread.
+	 */
+	private boolean contains( Component c, int x, int y ) {
+		return x >= 0 && y >= 0 && x < c.getWidth() && y < c.getHeight();
+	}
+
 	private int lastCaptionHitTestX;
 	private int lastCaptionHitTestY;
 	private long lastCaptionHitTestTime;
@@ -1352,10 +1429,7 @@ public class FlatTitlePane
 			activeChanged( true );
 			updateNativeTitleBarHeightAndHitTestSpots();
 
-			if( isWindowTopBorderNeeded() )
+			repaintBorder();
-				WindowTopBorder.getInstance().repaintBorder( FlatTitlePane.this );
-
-			repaintWindowBorder();
 		}
 
 		@Override
@@ -1363,10 +1437,22 @@ public class FlatTitlePane
 			activeChanged( false );
 			updateNativeTitleBarHeightAndHitTestSpots();
 
-			if( isWindowTopBorderNeeded() )
+			repaintBorder();
+		}
+
+		private void repaintBorder() {
+			// Windows 10 top border
+			if( windowTopBorderLayer != null && windowTopBorderLayer.isShowing())
+				WindowTopBorder.getInstance().repaintBorder( windowTopBorderLayer );
+			else if( isWindowTopBorderNeeded() && !isWindowMaximized() && !isFullWindowContent() )
 				WindowTopBorder.getInstance().repaintBorder( FlatTitlePane.this );
 
-			repaintWindowBorder();
+			// Window border used for non-native window decorations
+			if( rootPane.getBorder() instanceof FlatRootPaneUI.FlatWindowBorder ) {
+				// not repainting four areas on the four sides because RepaintManager
+				// unions dirty regions, which also results in repaint of whole rootpane
+				rootPane.repaint();
+			}
 		}
 
 		@Override
@@ -1386,22 +1472,9 @@ debug*/
 
 		private Point dragOffset;
 		private boolean linuxNativeMove;
-		private long lastSingleClickWhen;
 
 		@Override
 		public void mouseClicked( MouseEvent e ) {
-			// on Linux, when using native library, the mouse clicked event
-			// is usually not sent and maximize/restore is done in mouse pressed event
-			// this check is here for the case that a mouse clicked event comes through for some reason
-			if( linuxNativeMove && SystemInfo.isLinux && FlatNativeLinuxLibrary.isWMUtilsSupported( window ) ) {
-				// see comment in mousePressed()
-				if( lastSingleClickWhen != 0 && (e.getWhen() - lastSingleClickWhen) <= getMultiClickInterval() ) {
-					lastSingleClickWhen = 0;
-					maximizeOrRestore();
-				}
-				return;
-			}
-
 			if( e.getClickCount() == 2 && SwingUtilities.isLeftMouseButton( e ) ) {
 				if( SwingUtilities.getDeepestComponentAt( FlatTitlePane.this, e.getX(), e.getY() ) == iconLabel ) {
 					// double-click on icon closes window
@@ -1432,42 +1505,6 @@ debug*/
 
 			dragOffset = SwingUtilities.convertPoint( mouseLayer, e.getPoint(), window );
 			linuxNativeMove = false;
-
-			// on Linux, move or maximize/restore window
-			if( SystemInfo.isLinux && FlatNativeLinuxLibrary.isWMUtilsSupported( window ) ) {
-				// The fired Java mouse events, when doing a double-click and the first click
-				// sends a _NET_WM_MOVERESIZE message, are different for various Linux distributions:
-				//   CentOS 7      (GNOME 3.28.2, X11):   PRESSED(clickCount=1) PRESSED(clickCount=2) RELEASED(clickCount=2)
-				//   Ubuntu 20.04  (GNOME 3.36.1, X11):   PRESSED(clickCount=1) PRESSED(clickCount=2) RELEASED(clickCount=2)
-				//   Ubuntu 22.04  (GNOME 42.2, Wayland): PRESSED(clickCount=1)                       RELEASED(clickCount=1) CLICKED(clickCount=1)
-				//   Kubuntu 22.04 (KDE 5.24.4, X11):     PRESSED(clickCount=1) PRESSED(clickCount=1) RELEASED(clickCount=1)
-
-				// double-click is not always recognized in Java when using _NET_WM_MOVERESIZE message
-				int clickCount = e.getClickCount();
-				if( clickCount == 1 && lastSingleClickWhen != 0 && (e.getWhen() - lastSingleClickWhen) <= getMultiClickInterval() )
-					clickCount = 2;
-
-				switch( clickCount ) {
-					case 1:
-						// move window via _NET_WM_MOVERESIZE message
-						e.consume();
-						linuxNativeMove = FlatNativeLinuxLibrary.moveOrResizeWindow( window, e, FlatNativeLinuxLibrary.MOVE );
-						lastSingleClickWhen = e.getWhen();
-						break;
-
-					case 2:
-						// maximize/restore on double-click
-						// also done here because no mouse clicked event is sent when using _NET_WM_MOVERESIZE message
-						lastSingleClickWhen = 0;
-						maximizeOrRestore();
-						break;
-				}
-			}
-		}
-
-		private int getMultiClickInterval() {
-			Object value = Toolkit.getDefaultToolkit().getDesktopProperty( "awt.multiClickInterval" );
-			return (value instanceof Integer) ? (Integer) value : 500;
 		}
 
 		@Override public void mouseReleased( MouseEvent e ) {}
@@ -1490,6 +1527,13 @@ debug*/
 			if( hasNativeCustomDecoration() )
 				return; // do nothing if having native window border
 
+			// on Linux, move window using window manager
+			if( SystemInfo.isLinux && FlatNativeLinuxLibrary.isWMUtilsSupported( window ) ) {
+				linuxNativeMove = FlatNativeLinuxLibrary.moveOrResizeWindow( window, e, FlatNativeLinuxLibrary.MOVE );
+				if( linuxNativeMove )
+					return;
+			}
+
 			// restore window if it is maximized
 			if( window instanceof Frame ) {
 				Frame frame = (Frame) window;
@@ -1559,6 +1603,15 @@ debug*/
 		 * Useful for components that do not use mouse input on whole component bounds.
 		 * E.g. a tabbed pane with a few tabs has some empty space beside the tabs
 		 * that can be used to move the window.
+		 * <p>
+		 * Note:
+		 * <ul>
+		 *   <li>This method is invoked often when mouse is moved over window title bar area
+		 *       and should therefore return quickly.
+		 *   <li>This method is invoked on 'AWT-Windows' thread (not 'AWT-EventQueue' thread)
+		 *       while processing Windows messages.
+		 *       It <b>must not</b> change any component property or layout because this could cause a dead lock.
+		 * </ul>
 		 *
 		 * @return {@code true} if the component is not interested in mouse input at the given location
 		 *         {@code false} if the component wants process mouse input at the given location

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToggleButtonUI.java

@@ -26,6 +26,7 @@ import javax.swing.*;
 import javax.swing.plaf.ComponentUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -159,14 +160,14 @@ public class FlatToggleButtonUI
 					b.revalidate();
 				}
 
-				b.repaint();
+				HiDPIUtils.repaint( b );
 				break;
 
 			case TAB_BUTTON_UNDERLINE_PLACEMENT:
 			case TAB_BUTTON_UNDERLINE_HEIGHT:
 			case TAB_BUTTON_UNDERLINE_COLOR:
 			case TAB_BUTTON_SELECTED_BACKGROUND:
-				b.repaint();
+				HiDPIUtils.repaint( b );
 				break;
 		}
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolBarSeparatorUI.java

@@ -36,6 +36,7 @@ import javax.swing.plaf.basic.BasicToolBarSeparatorUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 
 /**
@@ -131,7 +132,7 @@ public class FlatToolBarSeparatorUI
 				} else
 					installStyle( s );
 				s.revalidate();
-				s.repaint();
+				HiDPIUtils.repaint( s );
 				break;
 		}
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolBarUI.java

@@ -47,6 +47,7 @@ import javax.swing.plaf.basic.BasicToolBarUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -443,7 +444,7 @@ public class FlatToolBarUI
 
 		// repaint button group
 		if( gr != null )
-			toolBar.repaint( gr );
+			HiDPIUtils.repaint(toolBar, gr );
 	}
 
 	private ButtonGroup getButtonGroup( AbstractButton b ) {
@@ -530,8 +531,11 @@ public class FlatToolBarUI
 
 		private Component getRecentComponent( Container aContainer, boolean first ) {
 			// if moving focus into the toolbar, focus recently focused toolbar button
-			if( focusedCompIndex >= 0 && focusedCompIndex < toolBar.getComponentCount() )
+			if( focusedCompIndex >= 0 && focusedCompIndex < toolBar.getComponentCount() ) {
-				return toolBar.getComponent( focusedCompIndex );
+				Component c = toolBar.getComponent( focusedCompIndex );
+				if( accept( c ) )
+					return c;
+			}
 
 			return first
 				? super.getFirstComponent( aContainer )

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolTipUI.java

@@ -61,7 +61,7 @@ public class FlatToolTipUI
 		super.installUI( c );
 
 		// update HTML renderer if necessary
-		FlatLabelUI.updateHTMLRenderer( c, ((JToolTip)c).getTipText(), false );
+		FlatHTML.updateRendererCSSFontBaseSize( c );
 	}
 
 	@Override
@@ -81,11 +81,7 @@ public class FlatToolTipUI
 	/** @since 2.0.1 */
 	@Override
 	public void propertyChange( PropertyChangeEvent e ) {
-		String name = e.getPropertyName();
+		FlatHTML.propertyChange( e );
-		if( name == "tiptext" || name == "font" || name == "foreground" ) {
-			JToolTip toolTip = (JToolTip) e.getSource();
-			FlatLabelUI.updateHTMLRenderer( toolTip, toolTip.getTipText(), false );
-		}
 	}
 
 	@Override

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTreeUI.java

@@ -47,6 +47,7 @@ import javax.swing.tree.DefaultTreeCellRenderer;
 import javax.swing.tree.TreePath;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
+import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -101,9 +102,11 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Tree.selectionForeground				Color
  * @uiDefault Tree.selectionInactiveBackground		Color
  * @uiDefault Tree.selectionInactiveForeground		Color
+ * @uiDefault Tree.alternateRowColor				Color
  * @uiDefault Tree.selectionInsets					Insets
  * @uiDefault Tree.selectionArc						int
  * @uiDefault Tree.wideSelection					boolean
+ * @uiDefault Tree.wideCellRenderer					boolean
  * @uiDefault Tree.showCellFocusIndicator			boolean
  * @uiDefault Tree.showDefaultIcons					boolean
  *
@@ -140,9 +143,11 @@ public class FlatTreeUI
 	@Styleable protected Color selectionInactiveBackground;
 	@Styleable protected Color selectionInactiveForeground;
 	@Styleable protected Color selectionBorderColor;
+	/** @since 3.6 */ @Styleable protected Color alternateRowColor;
 	/** @since 3 */ @Styleable protected Insets selectionInsets;
 	/** @since 3 */ @Styleable protected int selectionArc;
 	@Styleable protected boolean wideSelection;
+	/** @since 3.6 */ @Styleable protected boolean wideCellRenderer;
 	@Styleable protected boolean showCellFocusIndicator;
 	/** @since 3 */ protected boolean showDefaultIcons;
 
@@ -191,9 +196,11 @@ public class FlatTreeUI
 		selectionInactiveBackground = UIManager.getColor( "Tree.selectionInactiveBackground" );
 		selectionInactiveForeground = UIManager.getColor( "Tree.selectionInactiveForeground" );
 		selectionBorderColor = UIManager.getColor( "Tree.selectionBorderColor" );
+		alternateRowColor = UIManager.getColor( "Tree.alternateRowColor" );
 		selectionInsets = UIManager.getInsets( "Tree.selectionInsets" );
 		selectionArc = UIManager.getInt( "Tree.selectionArc" );
 		wideSelection = UIManager.getBoolean( "Tree.wideSelection" );
+		wideCellRenderer = UIManager.getBoolean( "Tree.wideCellRenderer" );
 		showCellFocusIndicator = UIManager.getBoolean( "Tree.showCellFocusIndicator" );
 		showDefaultIcons = UIManager.getBoolean( "Tree.showDefaultIcons" );
 
@@ -226,6 +233,7 @@ public class FlatTreeUI
 		selectionInactiveBackground = null;
 		selectionInactiveForeground = null;
 		selectionBorderColor = null;
+		alternateRowColor = null;
 
 		defaultLeafIcon = null;
 		defaultClosedIcon = null;
@@ -309,8 +317,9 @@ public class FlatTreeUI
 			if( e.getSource() == tree ) {
 				switch( e.getPropertyName() ) {
 					case TREE_WIDE_SELECTION:
+					case TREE_WIDE_CELL_RENDERER:
 					case TREE_PAINT_SELECTION:
-						tree.repaint();
+						HiDPIUtils.repaint( tree );
 						break;
 
 					case "dropLocation":
@@ -325,7 +334,7 @@ public class FlatTreeUI
 					case STYLE_CLASS:
 						installStyle();
 						tree.revalidate();
-						tree.repaint();
+						HiDPIUtils.repaint( tree );
 						break;
 
 					case "enabled":
@@ -353,7 +362,7 @@ public class FlatTreeUI
 
 		Rectangle r = tree.getPathBounds( loc.getPath() );
 		if( r != null )
-			tree.repaint( 0, r.y, tree.getWidth(), r.height );
+			HiDPIUtils.repaint( tree, 0, r.y, tree.getWidth(), r.height );
 	}
 
 	@Override
@@ -370,14 +379,14 @@ public class FlatTreeUI
 			{
 				if( changedPaths.length > 4 ) {
 					// same is done in BasicTreeUI.Handler.valueChanged()
-					tree.repaint();
+					HiDPIUtils.repaint( tree );
 				} else {
 					int arc = (int) Math.ceil( UIScale.scale( selectionArc / 2f ) );
 
 					for( TreePath path : changedPaths ) {
 						Rectangle r = getPathBounds( tree, path );
 						if( r != null )
-							tree.repaint( r.x, r.y - arc, r.width, r.height + (arc * 2) );
+							HiDPIUtils.repaint( tree, r.x, r.y - arc, r.width, r.height + (arc * 2) );
 					}
 				}
 			}
@@ -570,6 +579,27 @@ public class FlatTreeUI
 		boolean isDropRow = isDropRow( row );
 		boolean needsSelectionPainting = (isSelected || isDropRow) && isPaintSelection();
 
+		// paint alternating rows
+		if( alternateRowColor != null && row % 2 != 0 ) {
+			g.setColor( alternateRowColor );
+
+			float arc = UIScale.scale( selectionArc / 2f );
+			FlatUIUtils.paintSelection( (Graphics2D) g, 0, bounds.y, tree.getWidth(), bounds.height,
+				UIScale.scale( selectionInsets ), arc, arc, arc, arc, 0 );
+		}
+
+		// update bounds for wide cell renderer
+		if( isWideSelection() && isWideCellRenderer() ) {
+			Rectangle wideBounds = new Rectangle( bounds );
+			if( tree.getComponentOrientation().isLeftToRight() )
+				wideBounds.width = tree.getWidth() - bounds.x - insets.right;
+			else {
+				wideBounds.x = insets.left;
+				wideBounds.width = bounds.x + bounds.width - insets.left;
+			}
+			bounds = wideBounds;
+		}
+
 		// do not paint row if editing
 		if( isEditing ) {
 			// paint wide selection
@@ -794,6 +824,11 @@ public class FlatTreeUI
 		return clientPropertyBoolean( tree, TREE_WIDE_SELECTION, wideSelection );
 	}
 
+	/** @since 3.6 */
+	protected boolean isWideCellRenderer() {
+		return clientPropertyBoolean( tree, TREE_WIDE_CELL_RENDERER, wideCellRenderer );
+	}
+
 	protected boolean isPaintSelection() {
 		return clientPropertyBoolean( tree, TREE_PAINT_SELECTION, paintSelection );
 	}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatUIUtils.java

@@ -26,6 +26,7 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.GraphicsConfiguration;
 import java.awt.GraphicsDevice;
+import java.awt.GraphicsEnvironment;
 import java.awt.Insets;
 import java.awt.KeyboardFocusManager;
 import java.awt.Paint;
@@ -34,6 +35,7 @@ import java.awt.RenderingHints;
 import java.awt.Shape;
 import java.awt.Stroke;
 import java.awt.SystemColor;
+import java.awt.Toolkit;
 import java.awt.Window;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
@@ -124,6 +126,25 @@ public class FlatUIUtils
 		dest.right = src.right;
 	}
 
+	/** @since 3.5 */
+	public static boolean isInsetsEmpty( Insets insets ) {
+		return insets.top == 0 && insets.left == 0 && insets.bottom == 0 && insets.right == 0;
+	}
+
+	/** @since 3.6 */
+	public static Color stateColor( boolean state, Color stateColor, Color defaultColor ) {
+		return (state && stateColor != null) ? stateColor : defaultColor;
+	}
+
+	/** @since 3.6 */
+	public static Color stateColor( boolean state1, Color state1Color,
+		boolean state2, Color state2Color, Color defaultColor )
+	{
+		return (state1 && state1Color != null)
+			? state1Color
+			: ((state2 && state2Color != null) ? state2Color : defaultColor);
+	}
+
 	public static Color getUIColor( String key, int defaultColorRGB ) {
 		Color color = UIManager.getColor( key );
 		return (color != null) ? color : new Color( defaultColorRGB );
@@ -395,6 +416,17 @@ public class FlatUIUtils
 		return (fullScreenWindow != null && fullScreenWindow == SwingUtilities.windowForComponent( c ));
 	}
 
+	/** @since 3.6.1 */
+	public static Insets getScreenInsets( GraphicsConfiguration gc ) {
+		// on Linux, getScreenInsets() may report wrong values in multi-screen setups
+		// see https://github.com/apache/netbeans/issues/8532#issuecomment-2909687016
+		if( SystemInfo.isLinux &&
+			GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices().length > 1 )
+		  return new Insets( 0, 0, 0, 0 );
+
+		return Toolkit.getDefaultToolkit().getScreenInsets( gc );
+	}
+
 	public static Boolean isRoundRect( Component c ) {
 		return (c instanceof JComponent)
 			? FlatClientProperties.clientPropertyBooleanStrict(
@@ -601,28 +633,55 @@ public class FlatUIUtils
 	public static void paintOutlinedComponent( Graphics2D g, int x, int y, int width, int height,
 		float focusWidth, float focusWidthFraction, float focusInnerWidth, float borderWidth, float arc,
 		Paint focusColor, Paint borderColor, Paint background )
+	{
+		paintOutlinedComponent( g, x, y, width, height, focusWidth, focusWidthFraction, focusInnerWidth,
+			borderWidth, arc, focusColor, borderColor, background, false );
+	}
+
+	static void paintOutlinedComponent( Graphics2D g, int x, int y, int width, int height,
+		float focusWidth, float focusWidthFraction, float focusInnerWidth, float borderWidth, float arc,
+		Paint focusColor, Paint borderColor, Paint background, boolean scrollPane )
 	{
 		double systemScaleFactor = UIScale.getSystemScaleFactor( g );
-		if( systemScaleFactor != 1 && systemScaleFactor != 2 ) {
+		if( (int) systemScaleFactor != systemScaleFactor ) {
 			// paint at scale 1x to avoid clipping on right and bottom edges at 125%, 150% or 175%
 			HiDPIUtils.paintAtScale1x( g, x, y, width, height,
 				(g2d, x2, y2, width2, height2, scaleFactor) -> {
 					paintOutlinedComponentImpl( g2d, x2, y2, width2, height2,
 						(float) (focusWidth * scaleFactor), focusWidthFraction, (float) (focusInnerWidth * scaleFactor),
 						(float) (borderWidth * scaleFactor), (float) (arc * scaleFactor),
-						focusColor, borderColor, background );
+						focusColor, borderColor, background, scrollPane, scaleFactor );
 				} );
 			return;
 		}
 
 		paintOutlinedComponentImpl( g, x, y, width, height, focusWidth, focusWidthFraction, focusInnerWidth,
-			borderWidth, arc, focusColor, borderColor, background );
+			borderWidth, arc, focusColor, borderColor, background, scrollPane, systemScaleFactor );
 	}
 
+	@SuppressWarnings( "SelfAssignment" ) // Error Prone
 	private static void paintOutlinedComponentImpl( Graphics2D g, int x, int y, int width, int height,
 		float focusWidth, float focusWidthFraction, float focusInnerWidth, float borderWidth, float arc,
-		Paint focusColor, Paint borderColor, Paint background )
+		Paint focusColor, Paint borderColor, Paint background, boolean scrollPane, double scaleFactor )
 	{
+		// Special handling for scrollpane and fractional scale factors (e.g. 1.25 - 1.75),
+		// where Swing scales one "logical" pixel (border insets) to either one or two physical pixels.
+		// Antialiasing is used to paint the border, which usually needs two physical pixels
+		// at small scale factors. 1px for the solid border and another 1px for antialiasing.
+		// But scrollpane view is painted over the border, which results in a painted border
+		// that is 1px thick at some sides and 2px thick at other sides.
+		if( scrollPane && scaleFactor != (int) scaleFactor ) {
+			if( focusWidth > 0 ) {
+				// reduce outer border thickness (focusWidth) so that inner side of
+				// component border (focusWidth + borderWidth) is at a full pixel
+				int totalWidth = (int) (focusWidth + borderWidth);
+				focusWidth = totalWidth - borderWidth;
+			} else {// if( scaleFactor > 1 && scaleFactor < 2 ) {
+				// reduce component border thickness (borderWidth) to full pixels
+				borderWidth = (int) borderWidth;
+			}
+		}
+
 		// outside bounds of the border and the background
 		float x1 = x + focusWidth;
 		float y1 = y + focusWidth;
@@ -780,7 +839,7 @@ public class FlatUIUtils
 
 		if( arcTopLeft > 0 || arcTopRight > 0 || arcBottomLeft > 0 || arcBottomRight > 0 ) {
 			double systemScaleFactor = UIScale.getSystemScaleFactor( g );
-			if( systemScaleFactor != 1 && systemScaleFactor != 2 ) {
+			if( systemScaleFactor != (int) systemScaleFactor ) {
 				// paint at scale 1x to avoid clipping on right and bottom edges at 125%, 150% or 175%
 				HiDPIUtils.paintAtScale1x( g, x, y, width, height,
 					(g2d, x2, y2, width2, height2, scaleFactor) -> {
@@ -1315,13 +1374,13 @@ debug*/
 		@Override
 		public void focusGained( FocusEvent e ) {
 			if( repaintCondition == null || repaintCondition.test( repaintComponent ) )
-				repaintComponent.repaint();
+				HiDPIUtils.repaint( repaintComponent );
 		}
 
 		@Override
 		public void focusLost( FocusEvent e ) {
 			if( repaintCondition == null || repaintCondition.test( repaintComponent ) )
-				repaintComponent.repaint();
+				HiDPIUtils.repaint( repaintComponent );
 		}
 	}
 

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatWindowResizer.java

@@ -41,7 +41,7 @@ import java.util.function.Supplier;
 import javax.swing.DesktopManager;
 import javax.swing.JComponent;
 import javax.swing.JInternalFrame;
-import javax.swing.JLayeredPane;
+import javax.swing.JPanel;
 import javax.swing.JRootPane;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
@@ -59,8 +59,6 @@ import com.formdev.flatlaf.util.UIScale;
 public abstract class FlatWindowResizer
 	implements PropertyChangeListener, ComponentListener
 {
-	protected final static Integer WINDOW_RESIZER_LAYER = JLayeredPane.DRAG_LAYER + 1;
-
 	protected final JComponent resizeComp;
 
 	protected final int borderDragThickness = FlatUIUtils.getUIInt( "RootPane.borderDragThickness", 5 );
@@ -81,12 +79,12 @@ public abstract class FlatWindowResizer
 		leftDragComp = createDragBorderComponent( NW_RESIZE_CURSOR, W_RESIZE_CURSOR, SW_RESIZE_CURSOR );
 		rightDragComp = createDragBorderComponent( NE_RESIZE_CURSOR, E_RESIZE_CURSOR, SE_RESIZE_CURSOR );
 
-		Container cont = (resizeComp instanceof JRootPane) ? ((JRootPane)resizeComp).getLayeredPane() : resizeComp;
+		// for rootpanes, add after glasspane
-		Object cons = (cont instanceof JLayeredPane) ? WINDOW_RESIZER_LAYER : null;
+		int insertIndex = (resizeComp instanceof JRootPane) ? 1 : 0;
-		cont.add( topDragComp, cons, 0 );
+		resizeComp.add( topDragComp,    insertIndex++ );
-		cont.add( bottomDragComp, cons, 1 );
+		resizeComp.add( bottomDragComp, insertIndex++ );
-		cont.add( leftDragComp, cons, 2 );
+		resizeComp.add( leftDragComp,   insertIndex++ );
-		cont.add( rightDragComp, cons, 3 );
+		resizeComp.add( rightDragComp,  insertIndex++ );
 
 		resizeComp.addComponentListener( this );
 		resizeComp.addPropertyChangeListener( "ancestor", this );
@@ -105,11 +103,10 @@ public abstract class FlatWindowResizer
 		resizeComp.removeComponentListener( this );
 		resizeComp.removePropertyChangeListener( "ancestor", this );
 
-		Container cont = topDragComp.getParent();
+		resizeComp.remove( topDragComp );
-		cont.remove( topDragComp );
+		resizeComp.remove( bottomDragComp );
-		cont.remove( bottomDragComp );
+		resizeComp.remove( leftDragComp );
-		cont.remove( leftDragComp );
+		resizeComp.remove( rightDragComp );
-		cont.remove( rightDragComp );
 	}
 
 	public void doLayout() {
@@ -120,7 +117,7 @@ public abstract class FlatWindowResizer
 		int y = 0;
 		int width = resizeComp.getWidth();
 		int height = resizeComp.getHeight();
-		if( width == 0 || height == 0 )
+		if( width <= 0 || height <= 0 )
 			return;
 
 		Insets resizeInsets = getResizeInsets();
@@ -191,7 +188,7 @@ public abstract class FlatWindowResizer
 	protected abstract Dimension getWindowMinimumSize();
 	protected abstract Dimension getWindowMaximumSize();
 
-	protected void beginResizing( int direction ) {}
+	protected void beginResizing( int resizeDir, MouseEvent e ) {}
 	protected void endResizing() {}
 
 	//---- interface PropertyChangeListener ----
@@ -234,17 +231,45 @@ public abstract class FlatWindowResizer
 	{
 		protected Window window;
 
+		private final JComponent centerComp;
 		private final boolean limitResizeToScreenBounds;
 
 		public WindowResizer( JRootPane rootPane ) {
 			super( rootPane );
 
+			// Transparent "center" component that is made visible only while resizing window.
+			// It uses same cursor as the area where resize dragging started.
+			// This ensures that the cursor shape stays stable while dragging mouse
+			// into the window to make window smaller. Otherwise it would toggling between
+			// resize and standard cursor because the component layout is not updated
+			// fast enough and the mouse cursor is always updated from the component
+			// at the mouse location.
+			centerComp = new JPanel();
+			centerComp.setOpaque( false );
+			centerComp.setVisible( false );
+			rootPane.add( centerComp, 5 );
+
 			// On Linux, limit window resizing to screen bounds because otherwise
 			// there would be a strange effect when the mouse is moved over a sidebar
 			// while resizing and the opposite window side is also resized.
 			limitResizeToScreenBounds = SystemInfo.isLinux;
 		}
 
+		@Override
+		public void uninstall() {
+			resizeComp.remove( centerComp );
+
+			super.uninstall();
+		}
+
+		@Override
+		public void doLayout() {
+			super.doLayout();
+
+			if( centerComp != null && centerComp.isVisible() )
+				centerComp.setBounds( 0, 0, resizeComp.getWidth(), resizeComp.getHeight() );
+		}
+
 		@Override
 		protected void addNotify() {
 			Container parent = resizeComp.getParent();
@@ -299,20 +324,17 @@ public abstract class FlatWindowResizer
 
 		@Override
 		protected boolean limitToParentBounds() {
-			return limitResizeToScreenBounds && window != null;
+			return limitResizeToScreenBounds && window != null && window.getGraphicsConfiguration() != null;
 		}
 
 		@Override
 		protected Rectangle getParentBounds() {
-			if( limitResizeToScreenBounds && window != null ) {
+			GraphicsConfiguration gc = window.getGraphicsConfiguration();
-				GraphicsConfiguration gc = window.getGraphicsConfiguration();
+			Rectangle bounds = gc.getBounds();
-				Rectangle bounds = gc.getBounds();
+			Insets insets = FlatUIUtils.getScreenInsets( gc );
-				Insets insets = window.getToolkit().getScreenInsets( gc );
+			return new Rectangle( bounds.x + insets.left, bounds.y + insets.top,
-				return new Rectangle( bounds.x + insets.left, bounds.y + insets.top,
+				bounds.width - insets.left - insets.right,
-					bounds.width - insets.left - insets.right,
+				bounds.height - insets.top - insets.bottom );
-					bounds.height - insets.top - insets.bottom );
-			}
-			return null;
 		}
 
 		@Override
@@ -346,6 +368,37 @@ public abstract class FlatWindowResizer
 		public void windowStateChanged( WindowEvent e ) {
 			updateVisibility();
 		}
+
+		@Override
+		protected void beginResizing( int resizeDir, MouseEvent e ) {
+			// on Linux, resize window using window manager
+			if( SystemInfo.isLinux && window != null && FlatNativeLinuxLibrary.isWMUtilsSupported( window ) ) {
+				int direction = -1;
+				switch( resizeDir ) {
+					case N_RESIZE_CURSOR:	direction = FlatNativeLinuxLibrary.SIZE_TOP; break;
+					case S_RESIZE_CURSOR:	direction = FlatNativeLinuxLibrary.SIZE_BOTTOM; break;
+					case W_RESIZE_CURSOR:	direction = FlatNativeLinuxLibrary.SIZE_LEFT; break;
+					case E_RESIZE_CURSOR:	direction = FlatNativeLinuxLibrary.SIZE_RIGHT; break;
+					case NW_RESIZE_CURSOR:	direction = FlatNativeLinuxLibrary.SIZE_TOPLEFT; break;
+					case NE_RESIZE_CURSOR:	direction = FlatNativeLinuxLibrary.SIZE_TOPRIGHT; break;
+					case SW_RESIZE_CURSOR:	direction = FlatNativeLinuxLibrary.SIZE_BOTTOMLEFT; break;
+					case SE_RESIZE_CURSOR:	direction = FlatNativeLinuxLibrary.SIZE_BOTTOMRIGHT; break;
+				}
+
+				if( direction >= 0 && FlatNativeLinuxLibrary.moveOrResizeWindow( window, e, direction ) )
+					return;
+			}
+
+			centerComp.setBounds( 0, 0, resizeComp.getWidth(), resizeComp.getHeight() );
+			centerComp.setCursor( getPredefinedCursor( resizeDir ) );
+			centerComp.setVisible( true );
+		}
+
+		@Override
+		protected void endResizing() {
+			centerComp.setVisible( false );
+			centerComp.setCursor( null );
+		}
 	}
 
 	//---- class InternalFrameResizer -----------------------------------------
@@ -427,7 +480,18 @@ public abstract class FlatWindowResizer
 		}
 
 		@Override
-		protected void beginResizing( int direction ) {
+		protected void beginResizing( int resizeDir, MouseEvent e ) {
+			int direction = 0;
+			switch( resizeDir ) {
+				case N_RESIZE_CURSOR:	direction = NORTH; break;
+				case S_RESIZE_CURSOR:	direction = SOUTH; break;
+				case W_RESIZE_CURSOR:	direction = WEST; break;
+				case E_RESIZE_CURSOR:	direction = EAST; break;
+				case NW_RESIZE_CURSOR:	direction = NORTH_WEST; break;
+				case NE_RESIZE_CURSOR:	direction = NORTH_EAST; break;
+				case SW_RESIZE_CURSOR:	direction = SOUTH_WEST; break;
+				case SE_RESIZE_CURSOR:	direction = SOUTH_EAST; break;
+			}
 			desktopManager.get().beginResizingFrame( getFrame(), direction );
 		}
 
@@ -535,18 +599,7 @@ debug*/
 			dragRightOffset = windowBounds.x + windowBounds.width - xOnScreen;
 			dragBottomOffset = windowBounds.y + windowBounds.height - yOnScreen;
 
-			int direction = 0;
+			beginResizing( resizeDir, e );
-			switch( resizeDir ) {
-				case N_RESIZE_CURSOR:	direction = NORTH; break;
-				case S_RESIZE_CURSOR:	direction = SOUTH; break;
-				case W_RESIZE_CURSOR:	direction = WEST; break;
-				case E_RESIZE_CURSOR:	direction = EAST; break;
-				case NW_RESIZE_CURSOR:	direction = NORTH_WEST; break;
-				case NE_RESIZE_CURSOR:	direction = NORTH_EAST; break;
-				case SW_RESIZE_CURSOR:	direction = SOUTH_WEST; break;
-				case SE_RESIZE_CURSOR:	direction = SOUTH_EAST; break;
-			}
-			beginResizing( direction );
 		}
 
 		@Override

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatWindowsNativeWindowBorder.java

@@ -21,6 +21,7 @@ import java.awt.Dialog;
 import java.awt.EventQueue;
 import java.awt.Frame;
 import java.awt.GraphicsConfiguration;
+import java.awt.Insets;
 import java.awt.Point;
 import java.awt.Rectangle;
 import java.awt.Window;
@@ -39,6 +40,7 @@ import javax.swing.event.ChangeListener;
 import javax.swing.event.EventListenerList;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.SystemInfo;
+import com.formdev.flatlaf.util.UIScale;
 
 //
 // Interesting resources:
@@ -282,6 +284,8 @@ class FlatWindowsNativeWindowBorder
 			HTMINBUTTON = 8,
 			HTMAXBUTTON = 9,
 			HTTOP = 12,
+			HTTOPLEFT = 13,
+			HTTOPRIGHT = 14,
 			HTCLOSE = 20;
 
 		private Window window;
@@ -341,6 +345,31 @@ class FlatWindowsNativeWindowBorder
 			// scale-down mouse x/y because Swing coordinates/values may be scaled on a HiDPI screen
 			Point pt = scaleDown( x, y );
 
+			// limit top resize border to 4px, which seems to be standard for modern WinUI apps
+			if( isOnResizeBorder && pt.y > UIScale.scale( 4 ) )
+				isOnResizeBorder = false;
+
+			if( isOnResizeBorder ) {
+				Insets insets = window.getInsets();
+
+				// return HTTOPLEFT if mouse is over top resize border on left side
+				//   - hovering mouse shows top-left resize cursor
+				//   - left-click-and-drag resizes window
+				if( pt.x <= insets.left + UIScale.scale( 12 ) )
+					return HTTOPLEFT;
+
+				// return HTTOPRIGHT if mouse is over top resize border on right side
+				//   - hovering mouse shows top-right resize cursor
+				//   - left-click-and-drag resizes window
+				if( pt.x >= window.getWidth() - insets.right - UIScale.scale( 12 ) )
+					return HTTOPRIGHT;
+
+				// return HTTOP if mouse is over top resize border
+				//   - hovering mouse shows vertical resize cursor
+				//   - left-click-and-drag vertically resizes window
+				return HTTOP;
+			}
+
 			// return HTSYSMENU if mouse is over application icon
 			//   - left-click on HTSYSMENU area shows system menu
 			//   - double-left-click sends WM_CLOSE
@@ -364,12 +393,6 @@ class FlatWindowsNativeWindowBorder
 			if( contains( closeButtonBounds, pt ) )
 				return HTCLOSE;
 
-			// return HTTOP if mouse is over top resize border
-			//   - hovering mouse shows vertical resize cursor
-			//   - left-click and drag vertically resizes window
-			if( isOnResizeBorder )
-				return HTTOP;
-
 			boolean isOnTitleBar = (pt.y < titleBarHeight);
 			if( isOnTitleBar ) {
 				// return HTCLIENT if mouse is over any Swing component in title bar

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/StackUtils.java

@@ -21,7 +21,7 @@ import java.util.function.BiPredicate;
 /**
  * @author Karl Tauber
  */
-class StackUtils
+public class StackUtils
 {
 	private static final StackUtils INSTANCE = new StackUtilsImpl();
 

flatlaf-core/src/main/java/com/formdev/flatlaf/util/ColorFunctions.java

@@ -224,6 +224,9 @@ public class ColorFunctions
 		if( functions.length == 1 && functions[0] instanceof Mix ) {
 			Mix mixFunction = (Mix) functions[0];
 			return mix( color, mixFunction.color2, mixFunction.weight / 100 );
+		} else if( functions.length == 1 && functions[0] instanceof Mix2 ) {
+			Mix2 mixFunction = (Mix2) functions[0];
+			return mix( mixFunction.color1, color, mixFunction.weight / 100 );
 		}
 
 		// convert RGB to HSL
@@ -386,7 +389,11 @@ public class ColorFunctions
 	//---- class Mix ----------------------------------------------------------
 
 	/**
-	 * Mix two colors.
+	 * Mix two colors using {@link ColorFunctions#mix(Color, Color, float)}.
+	 * First color is passed to {@link #apply(float[])}.
+	 * Second color is {@link #color2}.
+	 * <p>
+	 * Use {@link Mix2} to tint or shade color.
 	 *
 	 * @since 1.6
 	 */
@@ -420,4 +427,44 @@ public class ColorFunctions
 			return String.format( "mix(#%08x,%.0f%%)", color2.getRGB(), weight );
 		}
 	}
+
+	//---- class Mix2 ---------------------------------------------------------
+
+	/**
+	 * Mix two colors using {@link ColorFunctions#mix(Color, Color, float)}.
+	 * First color is {@link #color1}.
+	 * Second color is passed to {@link #apply(float[])}.
+	 *
+	 * @since 3.6
+	 */
+	public static class Mix2
+		implements ColorFunction
+	{
+		public final Color color1;
+		public final float weight;
+
+		public Mix2( Color color1, float weight ) {
+			this.color1 = color1;
+			this.weight = weight;
+		}
+
+		@Override
+		public void apply( float[] hsla ) {
+			// convert from HSL to RGB because color mixing is done on RGB values
+			Color color2 = HSLColor.toRGB( hsla[0], hsla[1], hsla[2], hsla[3] / 100 );
+
+			// mix
+			Color color = mix( color1, color2, weight / 100 );
+
+			// convert RGB to HSL
+			float[] hsl = HSLColor.fromRGB( color );
+			System.arraycopy( hsl, 0, hsla, 0, hsl.length );
+			hsla[3] = (color.getAlpha() / 255f) * 100;
+		}
+
+		@Override
+		public String toString() {
+			return String.format( "mix2(#%08x,%.0f%%)", color1.getRGB(), weight );
+		}
+	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/util/HiDPIUtils.java

@@ -16,15 +16,21 @@
 
 package com.formdev.flatlaf.util;
 
+import java.awt.Color;
+import java.awt.Component;
 import java.awt.Font;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
+import java.awt.Rectangle;
 import java.awt.font.GlyphVector;
 import java.awt.geom.AffineTransform;
 import java.awt.geom.Rectangle2D;
 import java.text.AttributedCharacterIterator;
 import javax.swing.JComponent;
+import javax.swing.RepaintManager;
+import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.FlatSystemProperties;
+import com.formdev.flatlaf.ui.StackUtils;
 
 /**
  * @author Karl Tauber
@@ -320,6 +326,258 @@ public class HiDPIUtils
 			public void drawGlyphVector( GlyphVector g, float x, float y ) {
 				super.drawGlyphVector( g, x, y + yCorrection );
 			}
+
+			@Override
+			public void fillRect( int x, int y, int width, int height ) {
+				// fix hard coded black color in HRuleView.paint() of '<hr noshade>'
+				if( super.getColor() == Color.black &&
+					StackUtils.wasInvokedFrom( "javax.swing.text.html.HRuleView", "paint", 4 ) )
+				{
+					super.setColor( FlatLaf.isLafDark() ? Color.lightGray : Color.darkGray );
+					super.fillRect( x, y, width, height );
+					super.setColor( Color.black );
+				} else
+					super.fillRect( x, y, width, height );
+			}
 		};
 	}
+
+	/**
+	 * Repaints the given component.
+	 * <p>
+	 * See {@link #repaint(Component, int, int, int, int)} for more details.
+	 *
+	 * @since 3.5
+	 */
+	public static void repaint( Component c ) {
+		repaint( c, 0, 0, c.getWidth(), c.getHeight() );
+	}
+
+	/**
+	 * Repaints the given component area.
+	 * <p>
+	 * See {@link #repaint(Component, int, int, int, int)} for more details.
+	 *
+	 * @since 3.5
+	 */
+	public static void repaint( Component c, Rectangle r ) {
+		repaint( c, r.x, r.y, r.width, r.height );
+	}
+
+	/**
+	 * Repaints the given component area.
+	 * <p>
+	 * Invokes {@link Component#repaint(int, int, int, int)} on the given component,
+	 * <p>
+	 * Use this method, instead of {@code Component.repaint(...)},
+	 * to fix a problem in Swing when using scale factors that end on .25 or .75
+	 * (e.g. 1.25, 1.75, 2.25, etc) and repainting single components, which may not
+	 * repaint right and/or bottom 1px edge of component.
+	 * <p>
+	 * The problem may occur under following conditions:
+	 * <ul>
+	 *   <li>using Java 9 or later
+	 *   <li>system scale factor is 125%, 175%, 225%, ...
+	 *       (Windows only; Java on macOS and Linux does not support fractional scale factors)
+	 *   <li>repaint whole component or right/bottom area of component
+	 *   <li>component is opaque; or component is contained in a opaque container
+	 *       that has same right/bottom bounds as component
+	 *   <li>component has bounds that Java/Swing scales different when repainting components
+	 * </ul>
+	 *
+	 * @since 3.5
+	 */
+	public static void repaint( Component c, int x, int y, int width, int height ) {
+		// repaint given component area
+		//   Always invoke repaint() on given component, even if also invoked (below)
+		//   on one of its ancestors, for the case that component overrides that method.
+		//   Also RepaintManager "merges" the two repaints into one.
+		c.repaint( x, y, width, height );
+
+		if( RepaintManager.currentManager( c ) instanceof HiDPIRepaintManager )
+			return;
+
+		// if necessary, also repaint given area in first ancestor that is larger than component
+		// to avoid clipping issue (see needsSpecialRepaint())
+		if( needsSpecialRepaint( c, x, y, width, height ) ) {
+			int x2 = x + c.getX();
+			int y2 = y + c.getY();
+			for( Component p = c.getParent(); p != null; p = p.getParent() ) {
+				x2 += p.getX();
+				y2 += p.getY();
+				if( x2 + width < p.getWidth() && y2 + height < p.getHeight() ) {
+					p.repaint( x2, y2, width, height );
+					break;
+				}
+			}
+		}
+	}
+
+	/**
+	 * There is a problem in Swing, when using scale factors that end on .25 or .75
+	 * (e.g. 1.25, 1.75, 2.25, etc) and repainting single components, which may not
+	 * repaint right and/or bottom 1px edge of component.
+	 * <p>
+	 * The component is first painted to an in-memory image,
+	 * and then that image is copied to the screen.
+	 * See {@code javax.swing.RepaintManager.PaintManager#paintDoubleBufferedFPScales()}.
+	 * <p>
+	 * There are two clipping rectangles involved when copying the image to the screen:
+	 * {@code sun.java2d.SunGraphics2D#devClip} and
+	 * {@code sun.java2d.SunGraphics2D#usrClip}.
+	 * <p>
+	 * {@code devClip} is the device clipping in physical pixels.
+	 * It gets the bounds of the painting component, which is either the passed component,
+	 * or if it is non-opaque, then the first opaque ancestor of the passed component.
+	 * It is calculated in {@code sun.java2d.SunGraphics2D#constrain()} while
+	 * getting a graphics context via {@link JComponent#getGraphics()}.
+	 * <p>
+	 * {@code usrClip} is the user clipping, which is set via {@link Graphics} clipping methods.
+	 * This is done in {@code javax.swing.RepaintManager.PaintManager#paintDoubleBufferedFPScales()}.
+	 * <p>
+	 * The intersection of {@code devClip} and {@code usrClip}
+	 * (computed in {@code sun.java2d.SunGraphics2D#validateCompClip()})
+	 * is used to copy the image to the screen.
+	 * <p>
+	 * Unfortunately different scaling/rounding strategies are used to calculate
+	 * the two clipping rectangles, which is the reason of the issue.
+	 * <p>
+	 * {@code devClip} (see {@code sun.java2d.SunGraphics2D#constrain()}):
+	 * <pre>{@code
+	 * int devX = (int) (x * scale);
+	 * int devWidth = Math.round( width * scale )
+	 * }</pre>
+	 * {@code usrClip} (see {@code javax.swing.RepaintManager.PaintManager#paintDoubleBufferedFPScales()}):
+	 * <pre>{@code
+	 * int usrX = (int) Math.ceil( (x * scale) - 0.5 );
+	 * int usrWidth = ((int) Math.ceil( ((x + width) * scale) - 0.5 )) - usrX;
+	 * }</pre>
+	 * X/Y coordinates are always rounded down for {@code devClip}, but rounded up for {@code usrClip}.
+	 * Width/height calculation is also different.
+	 */
+	private static boolean needsSpecialRepaint( Component c, int x, int y, int width, int height ) {
+		// no special repaint necessary for Java 8 or for macOS and Linux
+		// (Java on those platforms does not support fractional scale factors)
+		if( !SystemInfo.isJava_9_orLater || !SystemInfo.isWindows )
+			return false;
+
+		// check whether repaint area is empty or no component given
+		// (same checks as in javax.swing.RepaintManager.addDirtyRegion0())
+		if( width <= 0 || height <= 0 || c == null )
+			return false;
+
+		// check whether component has zero size
+		// (same checks as in javax.swing.RepaintManager.addDirtyRegion0())
+		int compWidth = c.getWidth();
+		int compHeight = c.getHeight();
+		if( compWidth <= 0 || compHeight <= 0 )
+			return false;
+
+		// check whether repaint area does span to right or bottom component edges
+		// (in this case, {@code devClip} is always larger than {@code usrClip})
+		if( x + width < compWidth && y + height < compHeight )
+			return false;
+
+		// if component is not opaque, Swing uses the first opaque ancestor for painting
+		if( !c.isOpaque() ) {
+			int x2 = x;
+			int y2 = y;
+			for( Component p = c.getParent(); p != null; p = p.getParent() ) {
+				x2 += p.getX();
+				y2 += p.getY();
+				if( p.isOpaque() ) {
+					// check whether repaint area does span to right or bottom edges
+					// of the opaque ancestor component
+					// (in this case, {@code devClip} is always larger than {@code usrClip})
+					if( x2 + width < p.getWidth() && y2 + height < p.getHeight() )
+						return false;
+					break;
+				}
+			}
+		}
+
+		// check whether Special repaint is necessary for current scale factor
+		// (doing this check late because it temporary allocates some memory)
+		double scaleFactor = UIScale.getSystemScaleFactor( c.getGraphicsConfiguration() );
+		double fraction = scaleFactor - (int) scaleFactor;
+		if( fraction == 0 || fraction == 0.5 )
+			return false;
+
+		return true;
+	}
+
+	/**
+	 * Installs a {@link HiDPIRepaintManager} on Windows when running in Java 9+,
+	 * but only if default repaint manager is currently installed.
+	 * <p>
+	 * Invoke once on application startup.
+	 * Compatible with all/other LaFs.
+	 *
+	 * @since 3.5
+	 */
+	public static void installHiDPIRepaintManager() {
+		if( !SystemInfo.isJava_9_orLater || !SystemInfo.isWindows )
+			return;
+
+		RepaintManager manager = RepaintManager.currentManager( (Component) null );
+		if( manager.getClass() == RepaintManager.class )
+			RepaintManager.setCurrentManager( new HiDPIRepaintManager() );
+	}
+
+	/**
+	 * Similar to {@link #repaint(Component, int, int, int, int)},
+	 * but invokes callback instead of invoking {@link Component#repaint(int, int, int, int)}.
+	 * <p>
+	 * For use in custom repaint managers.
+	 *
+	 * @since 3.5
+	 */
+	public static void addDirtyRegion( JComponent c, int x, int y, int width, int height, DirtyRegionCallback callback ) {
+		if( needsSpecialRepaint( c, x, y, width, height ) ) {
+			int x2 = x + c.getX();
+			int y2 = y + c.getY();
+			for( Component p = c.getParent(); p != null; p = p.getParent() ) {
+				if( x2 + width < p.getWidth() && y2 + height < p.getHeight() && p instanceof JComponent ) {
+					callback.addDirtyRegion( (JComponent) p, x2, y2, width, height );
+					return;
+				}
+				x2 += p.getX();
+				y2 += p.getY();
+			}
+		}
+
+		callback.addDirtyRegion( c, x, y, width, height );
+	}
+
+	//---- interface DirtyRegionCallback --------------------------------------
+
+	/**
+	 * For {@link HiDPIUtils#addDirtyRegion(JComponent, int, int, int, int, DirtyRegionCallback)}.
+	 *
+	 * @since 3.5
+	 */
+	public interface DirtyRegionCallback {
+		void addDirtyRegion( JComponent c, int x, int y, int w, int h );
+	}
+
+	//---- class HiDPIRepaintManager ------------------------------------------
+
+	/**
+	 * A repaint manager that fixes a problem in Swing when repainting components
+	 * at some scale factors (e.g. 125%, 175%, etc) on Windows.
+	 * <p>
+	 * Use {@link HiDPIUtils#installHiDPIRepaintManager()} to install it.
+	 * <p>
+	 * See {@link HiDPIUtils#repaint(Component, int, int, int, int)} for details.
+	 *
+	 * @since 3.5
+	 */
+	public static class HiDPIRepaintManager
+		extends RepaintManager
+	{
+		@Override
+		public void addDirtyRegion( JComponent c, int x, int y, int w, int h ) {
+			HiDPIUtils.addDirtyRegion( c, x, y, w, h, super::addDirtyRegion );
+		}
+	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/util/SystemInfo.java

@@ -31,6 +31,7 @@ public class SystemInfo
 	public static final boolean isWindows;
 	public static final boolean isMacOS;
 	public static final boolean isLinux;
+	/** @since 3.6 */ public static final boolean isUnknownOS;
 
 	// OS versions
 	public static final long osVersion;
@@ -59,6 +60,7 @@ public class SystemInfo
 	public static final boolean isJetBrainsJVM_11_orLater;
 
 	// UI toolkits
+	/** @since 3.6 */ public static final boolean isGNOME;
 	public static final boolean isKDE;
 
 	// other
@@ -75,6 +77,7 @@ public class SystemInfo
 		isWindows = osName.startsWith( "windows" );
 		isMacOS = osName.startsWith( "mac" );
 		isLinux = osName.startsWith( "linux" );
+		isUnknownOS = !isWindows && !isMacOS && !isLinux;
 
 		// OS versions
 		osVersion = scanVersion( System.getProperty( "os.version" ) );
@@ -104,7 +107,13 @@ public class SystemInfo
 		isJetBrainsJVM_11_orLater = isJetBrainsJVM && isJava_11_orLater;
 
 		// UI toolkits
-		isKDE = (isLinux && System.getenv( "KDE_FULL_SESSION" ) != null);
+		String desktop = isLinux ? System.getenv( "XDG_CURRENT_DESKTOP" ) : null;
+		isGNOME = (isLinux &&
+			(System.getenv( "GNOME_DESKTOP_SESSION_ID" ) != null ||
+			 (desktop != null && desktop.contains( "GNOME" ))));
+		isKDE = (isLinux &&
+			(System.getenv( "KDE_FULL_SESSION" ) != null ||
+			 (desktop != null && desktop.contains( "KDE" ))));
 
 		// other
 		isProjector = Boolean.getBoolean( "org.jetbrains.projector.server.enable" );

flatlaf-core/src/main/java/com/formdev/flatlaf/util/UIScale.java

@@ -33,6 +33,7 @@ import javax.swing.plaf.DimensionUIResource;
 import javax.swing.plaf.FontUIResource;
 import javax.swing.plaf.InsetsUIResource;
 import javax.swing.plaf.UIResource;
+import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.FlatSystemProperties;
 
 /**
@@ -188,7 +189,9 @@ public class UIScale
 		// because even if we are on a HiDPI display it is not sure
 		// that a larger font size is set by the current LaF
 		// (e.g. can avoid large icons with small text)
-		Font font = UIManager.getFont( "defaultFont" );
+		Font font = null;
+		if( UIManager.getLookAndFeel() instanceof FlatLaf )
+			font = UIManager.getFont( "defaultFont" );
 		if( font == null )
 			font = UIManager.getFont( "Label.font" );
 
@@ -244,6 +247,16 @@ public class UIScale
 	}
 
 	private static float computeScaleFactor( Font font ) {
+		String customFontSizeDivider = System.getProperty( "flatlaf.uiScale.fontSizeDivider" );
+		if( customFontSizeDivider != null ) {
+			try {
+				float fontSizeDivider = Math.max( Integer.parseInt( customFontSizeDivider ), 10 );
+				return font.getSize() / fontSizeDivider;
+			} catch( NumberFormatException ex ) {
+				// ignore
+			}
+		}
+
 		// default font size
 		float fontSizeDivider = 12f;
 

flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatDarculaLaf.properties

@@ -61,7 +61,6 @@ Component.arrowType = triangle
 #---- ProgressBar ----
 
 ProgressBar.foreground = darken(@foreground,10%)
-ProgressBar.selectionForeground = @background
 
 
 #---- RadioButton ----

flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatDarkLaf.properties

@@ -34,7 +34,7 @@
 
 # general background and foreground (text color)
 @background = #3c3f41
-@foreground = #bbb
+@foreground = #ddd
 @disabledBackground = @background
 @disabledForeground = shade(@foreground,25%)
 
@@ -45,7 +45,7 @@
 
 # selection
 @selectionBackground = @accentSelectionBackground
-@selectionForeground = contrast(@selectionBackground, @background, @foreground, 25%)
+@selectionForeground = contrast(@selectionBackground, shade(@background), tint(@foreground), 25%)
 @selectionInactiveBackground = spin(saturate(shade(@selectionBackground,70%),20%),-15)
 @selectionInactiveForeground = @foreground
 
@@ -187,6 +187,8 @@ Component.error.borderColor = desaturate($Component.error.focusedBorderColor,25%
 Component.error.focusedBorderColor = #8b3c3c
 Component.warning.borderColor = darken(desaturate($Component.warning.focusedBorderColor,20%),10%)
 Component.warning.focusedBorderColor = #ac7920
+Component.success.borderColor = desaturate($Component.success.focusedBorderColor,25%)
+Component.success.focusedBorderColor = #648b3c
 Component.custom.borderColor = desaturate(#f00,50%,relative derived noAutoInverse)
 
 
@@ -262,7 +264,7 @@ PopupMenu.hoverScrollArrowBackground = lighten(@background,5%)
 ProgressBar.background = lighten(@background,8%)
 ProgressBar.foreground = @accentSliderColor
 ProgressBar.selectionBackground = @foreground
-ProgressBar.selectionForeground = contrast($ProgressBar.foreground, @background, @foreground, 25%)
+ProgressBar.selectionForeground = contrast($ProgressBar.foreground, shade(@background), tint(@foreground), 25%)
 
 
 #---- RootPane ----
@@ -274,7 +276,7 @@ RootPane.inactiveBorderColor = lighten(@background,5%,derived)
 #---- ScrollBar ----
 
 ScrollBar.track = lighten(@background,1%,derived noAutoInverse)
-ScrollBar.thumb = lighten($ScrollBar.track,10%,derived noAutoInverse)
+ScrollBar.thumb = lighten($ScrollBar.track,15%,derived noAutoInverse)
 ScrollBar.hoverTrackColor = lighten($ScrollBar.track,4%,derived noAutoInverse)
 ScrollBar.hoverThumbColor = lighten($ScrollBar.thumb,10%,derived noAutoInverse)
 ScrollBar.pressedThumbColor = lighten($ScrollBar.thumb,15%,derived noAutoInverse)
@@ -284,7 +286,7 @@ ScrollBar.pressedButtonBackground = lighten(@background,10%,derived noAutoInvers
 
 #---- Separator ----
 
-Separator.foreground = tint(@background,10%)
+Separator.foreground = tint(@background,15%)
 
 
 #---- Slider ----
@@ -341,8 +343,13 @@ TableHeader.bottomSeparatorColor = $TableHeader.separatorColor
 #---- TitlePane ----
 
 TitlePane.embeddedForeground = darken($TitlePane.foreground,15%)
-TitlePane.buttonHoverBackground = lighten($TitlePane.background,15%,derived)
+TitlePane.buttonHoverBackground = lighten($TitlePane.background,10%,derived)
-TitlePane.buttonPressedBackground = lighten($TitlePane.background,10%,derived)
+TitlePane.buttonPressedBackground = lighten($TitlePane.background,6%,derived)
+
+# Linux
+[linux]TitlePane.buttonBackground = lighten($TitlePane.background,5%,derived)
+[linux]TitlePane.buttonHoverBackground = lighten($TitlePane.background,10%,derived)
+[linux]TitlePane.buttonPressedBackground = lighten($TitlePane.background,15%,derived)
 
 
 #---- ToggleButton ----

flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLaf.properties

@@ -50,6 +50,9 @@ mini.font = -3
 #defaultFont = ...
 
 # font weights
+#  fallback for unknown platform
+light.font = +0
+semibold.font = +0
 #  Windows
 [win]light.font = "Segoe UI Light"
 [win]semibold.font = "Segoe UI Semibold"
@@ -59,15 +62,12 @@ mini.font = -3
 #  Linux
 [linux]light.font = "Lato Light", "Ubuntu Light", "Cantarell Light"
 [linux]semibold.font = "Lato Semibold", "Ubuntu Medium", "Montserrat SemiBold"
-#  fallback for unknown platform
-light.font = +0
-semibold.font = +0
 
 # monospaced
+monospaced.font = Monospaced
 [win]monospaced.font = Monospaced
 [mac]monospaced.font = Menlo, Monospaced
 [linux]monospaced.font = "Liberation Mono", "Ubuntu Mono", Monospaced
-monospaced.font = Monospaced
 
 # styles
 [style].h00 = font: $h00.font
@@ -564,8 +564,8 @@ RadioButtonMenuItem.background = @menuBackground
 #---- RootPane ----
 
 RootPane.border = com.formdev.flatlaf.ui.FlatRootPaneUI$FlatWindowBorder
-RootPane.borderDragThickness = 5
+RootPane.borderDragThickness = 6
-RootPane.cornerDragWidth = 16
+RootPane.cornerDragWidth = 32
 RootPane.honorFrameMinimumSizeOnResize = false
 RootPane.honorDialogMinimumSizeOnResize = true
 
@@ -574,12 +574,12 @@ RootPane.honorDialogMinimumSizeOnResize = true
 
 ScrollBar.width = 10
 ScrollBar.minimumButtonSize = 12,12
-ScrollBar.minimumThumbSize = 10,10
+ScrollBar.minimumThumbSize = 18,18
 ScrollBar.maximumThumbSize = 100000,100000
 ScrollBar.trackInsets = 0,0,0,0
-ScrollBar.thumbInsets = 0,0,0,0
+ScrollBar.thumbInsets = 2,2,2,2
 ScrollBar.trackArc = 0
-ScrollBar.thumbArc = 0
+ScrollBar.thumbArc = 999
 ScrollBar.hoverThumbWithTrack = false
 ScrollBar.pressedThumbWithTrack = false
 ScrollBar.showButtons = false
@@ -588,15 +588,8 @@ ScrollBar.buttonArrowColor = @buttonArrowColor
 ScrollBar.buttonDisabledArrowColor = @buttonDisabledArrowColor
 ScrollBar.allowsAbsolutePositioning = true
 
-[mac]ScrollBar.minimumThumbSize = 18,18
-[mac]ScrollBar.thumbInsets = 2,2,2,2
-[mac]ScrollBar.thumbArc = 999
 [mac]ScrollBar.hoverThumbWithTrack = true
 
-[linux]ScrollBar.minimumThumbSize = 18,18
-[linux]ScrollBar.thumbInsets = 2,2,2,2
-[linux]ScrollBar.thumbArc = 999
-
 
 #---- ScrollPane ----
 
@@ -823,9 +816,14 @@ TitlePane.iconMargins = 3,8,3,8
 TitlePane.titleMargins = 3,0,3,0
 TitlePane.titleMinimumWidth = 60
 TitlePane.buttonSize = 44,30
+TitlePane.buttonInsets = 0,0,0,0
+TitlePane.buttonArc = 0
 TitlePane.buttonMinimumWidth = 30
 TitlePane.buttonMaximizedHeight = 22
 TitlePane.buttonSymbolHeight = 10
+TitlePane.buttonsGap = 0
+TitlePane.buttonsMargins = 0,0,0,0
+TitlePane.buttonsFillVertically = true
 TitlePane.centerTitle = false
 TitlePane.centerTitleIfMenuBarEmbedded = true
 TitlePane.showIconBesideTitle = false
@@ -856,6 +854,27 @@ TitlePane.small.iconifyIcon = com.formdev.flatlaf.icons.FlatWindowIconifyIcon, s
 TitlePane.small.maximizeIcon = com.formdev.flatlaf.icons.FlatWindowMaximizeIcon, small
 TitlePane.small.restoreIcon = com.formdev.flatlaf.icons.FlatWindowRestoreIcon, small
 
+# Linux
+[linux]TitlePane.buttonSize = 26,26
+[linux]TitlePane.buttonInsets = 2,2,2,2
+[linux]TitlePane.buttonArc = 999
+[linux]TitlePane.buttonMaximizedHeight = -1
+[linux]TitlePane.buttonSymbolHeight = 8
+[linux]TitlePane.buttonsGap = 8
+[linux]TitlePane.buttonsMargins = 4,4,4,4
+[linux]TitlePane.buttonsFillVertically = false
+[linux]TitlePane.small.buttonSize = 20,20
+[linux]TitlePane.small.buttonInsets = 1,1,1,1
+[linux]TitlePane.small.buttonSymbolHeight = 6
+[linux]TitlePane.small.buttonsGap = 4
+[linux]TitlePane.small.buttonsMargins = 2,2,2,2
+[linux]TitlePane.closeBackground = $?TitlePane.buttonBackground
+[linux]TitlePane.closeInactiveBackground = $?TitlePane.buttonInactiveBackground
+[linux]TitlePane.closeHoverBackground = $?TitlePane.buttonHoverBackground
+[linux]TitlePane.closePressedBackground = $?TitlePane.buttonPressedBackground
+[linux]TitlePane.closeHoverForeground = $?TitlePane.foreground
+[linux]TitlePane.closePressedForeground = $?TitlePane.foreground
+
 
 #---- ToggleButton ----
 
@@ -934,6 +953,7 @@ Tree.rendererMargins = 1,2,1,2
 Tree.selectionInsets = 0,0,0,0
 Tree.selectionArc = 0
 Tree.wideSelection = true
+Tree.wideCellRenderer = false
 Tree.repaintWholeRow = true
 Tree.paintLines = false
 Tree.showCellFocusIndicator = false

flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLightLaf.properties

@@ -36,7 +36,7 @@
 @background = #f2f2f2
 @foreground = #000
 @disabledBackground = @background
-@disabledForeground = tint(@foreground,55%)
+@disabledForeground = tint(@foreground,50%)
 
 # component background
 @buttonBackground = lighten(@background,5%)
@@ -194,6 +194,8 @@ Component.error.borderColor = lighten(desaturate($Component.error.focusedBorderC
 Component.error.focusedBorderColor = #e53e4d
 Component.warning.borderColor = lighten(saturate($Component.warning.focusedBorderColor,25%),20%)
 Component.warning.focusedBorderColor = #e2a53a
+Component.success.borderColor = lighten(desaturate($Component.success.focusedBorderColor,20%),25%)
+Component.success.focusedBorderColor = #14dc92
 Component.custom.borderColor = lighten(desaturate(#f00,20%,derived noAutoInverse),25%,derived noAutoInverse)
 
 
@@ -280,7 +282,7 @@ RootPane.inactiveBorderColor = darken(@background,30%,derived)
 #---- ScrollBar ----
 
 ScrollBar.track = lighten(@background,1%,derived noAutoInverse)
-ScrollBar.thumb = darken($ScrollBar.track,10%,derived noAutoInverse)
+ScrollBar.thumb = darken($ScrollBar.track,15%,derived noAutoInverse)
 ScrollBar.hoverTrackColor = darken($ScrollBar.track,3%,derived noAutoInverse)
 ScrollBar.hoverThumbColor = darken($ScrollBar.thumb,10%,derived noAutoInverse)
 ScrollBar.pressedThumbColor = darken($ScrollBar.thumb,20%,derived noAutoInverse)
@@ -347,8 +349,13 @@ TableHeader.bottomSeparatorColor = $TableHeader.separatorColor
 #---- TitlePane ----
 
 TitlePane.embeddedForeground = lighten($TitlePane.foreground,35%)
-TitlePane.buttonHoverBackground = darken($TitlePane.background,10%,derived)
+TitlePane.buttonHoverBackground = darken($TitlePane.background,5%,derived)
-TitlePane.buttonPressedBackground = darken($TitlePane.background,8%,derived)
+TitlePane.buttonPressedBackground = darken($TitlePane.background,3%,derived)
+
+# Linux
+[linux]TitlePane.buttonBackground = darken($TitlePane.background,5%,derived)
+[linux]TitlePane.buttonHoverBackground = darken($TitlePane.background,10%,derived)
+[linux]TitlePane.buttonPressedBackground = darken($TitlePane.background,15%,derived)
 
 
 #---- ToggleButton ----

flatlaf-core/src/main/resources/com/formdev/flatlaf/IntelliJTheme$ThemeLaf.properties

@@ -21,27 +21,41 @@
 #  - https://www.formdev.com/flatlaf/properties-files/
 #  - https://www.formdev.com/flatlaf/how-to-customize/
 #
+# Properties in this file are applied in following order:
+#   1. properties without '{...}' and without '[...]' prefix
+#   2. properties specified in .theme.json file
+#   3. properties starting with '{*}'
+#   4. properties starting with '{*-light}' or '{*-dark}'
+#   5. properties starting with '{author-<author>}',
+#      where '<author>' is replaced with "author" value from .theme.json file 
+#   6. properties starting with '{<name>---<author>}',
+#      where '<name>' and '<author>' are replaced with "name" and "author" values from .theme.json file 
+#   7. properties starting with '{<name>}',
+#      where '<name>' is replaced with "name" value from .theme.json file 
+#   8. properties with '[...]' prefix
+#
+
 
 #---- system colors ----
 
 # fix (most) system colors because they are usually not set in .json files
-desktop = lazy(TextField.background)
+desktop = $TextField.background
-activeCaptionText = lazy(TextField.foreground)
+activeCaptionText = $TextField.foreground
-inactiveCaptionText = lazy(TextField.foreground)
+inactiveCaptionText = $TextField.foreground
-window = lazy(Panel.background)
+window = $Panel.background
-windowBorder = lazy(TextField.foreground)
+windowBorder = $TextField.foreground
-windowText = lazy(TextField.foreground)
+windowText = $TextField.foreground
-menu = lazy(Menu.background)
+menu = $Menu.background
-menuText = lazy(Menu.foreground)
+menuText = $Menu.foreground
-text = lazy(TextField.background)
+text = $TextField.background
-textText = lazy(TextField.foreground)
+textText = $TextField.foreground
-textHighlight = lazy(TextField.selectionBackground)
+textHighlight = $TextField.selectionBackground
-textHighlightText = lazy(TextField.selectionForeground)
+textHighlightText = $TextField.selectionForeground
-textInactiveText = lazy(TextField.inactiveForeground)
+textInactiveText = $TextField.inactiveForeground
-control = lazy(Panel.background)
+control = $Panel.background
-controlText = lazy(TextField.foreground)
+controlText = $TextField.foreground
-info = lazy(ToolTip.background)
+info = $ToolTip.background
-infoText = lazy(ToolTip.foreground)
+infoText = $ToolTip.foreground
 
 
 #---- variables ----
@@ -49,26 +63,13 @@ infoText = lazy(ToolTip.foreground)
 # make sure that accent color (set via FlatLaf.setSystemColorGetter()) is ignored 
 @accentColor = null
 
+# use same accent color for checkmark, slider, tab underline, etc.
+@accentBase2Color = @accentBaseColor
+
 # use fixed color because it is used in borders
 @cellFocusColor = #222
 
 
-#---- Button ----
-
-Button.startBackground = $Button.background
-Button.endBackground = $Button.background
-Button.startBorderColor = $Button.borderColor
-Button.endBorderColor = $Button.borderColor
-
-Button.default.startBackground = $Button.default.background
-Button.default.endBackground = $Button.default.background
-Button.default.startBorderColor = $Button.default.borderColor
-Button.default.endBorderColor = $Button.default.borderColor
-
-Button.hoverBorderColor = null
-Button.default.hoverBorderColor = null
-
-
 #---- CheckBoxMenuItem ----
 
 # colors from intellij/checkmark.svg and darcula/checkmark.svg
@@ -76,34 +77,33 @@ Button.default.hoverBorderColor = null
 [dark]CheckBoxMenuItem.icon.checkmarkColor=#fff9
 
 
-#---- Component ----
-
-Component.accentColor = lazy(ProgressBar.foreground)
-
-
-#---- HelpButton ----
-
-HelpButton.hoverBorderColor = null
-
-
 #---- Slider ----
 
-Slider.focusedColor = fade($Component.focusColor,40%,derived)
+# this "reverses" definition in FlatLightLaf/FlatDarkLaf.properties 
+Slider.trackValueColor = $Slider.thumbColor
+Slider.thumbColor = @accentSliderColor
+
+
+#---- Spinner ----
+
+# Spinner arrow button always has same colors as ComboBox arrow button
+Spinner.buttonBackground = $ComboBox.buttonEditableBackground
+Spinner.buttonArrowColor = $ComboBox.buttonArrowColor
+Spinner.buttonDisabledArrowColor = $ComboBox.buttonDisabledArrowColor
 
 
 #---- TabbedPane ----
 
 # colors from JBUI.CurrentTheme.DefaultTabs.inactiveUnderlineColor()
-[light]TabbedPane.inactiveUnderlineColor = #9ca7b8
+{*-light}TabbedPane.inactiveUnderlineColor = #9ca7b8
-[dark]TabbedPane.inactiveUnderlineColor = #747a80
+{*-dark}TabbedPane.inactiveUnderlineColor = #747a80
 
 
 #---- ToggleButton ----
 
-ToggleButton.startBackground = $ToggleButton.background
+{*}ToggleButton.background = $Button.background
-ToggleButton.endBackground = $ToggleButton.background
+{*-dark}ToggleButton.selectedBackground = lighten($ToggleButton.background,15%,derived)
-[dark]ToggleButton.selectedBackground = lighten($ToggleButton.background,15%,derived)
+{*-dark}ToggleButton.disabledSelectedBackground = lighten($ToggleButton.background,5%,derived)
-[dark]ToggleButton.disabledSelectedBackground = lighten($ToggleButton.background,5%,derived)
 
 
 #---- theme specific ----
@@ -112,357 +112,434 @@ ToggleButton.endBackground = $ToggleButton.background
 @ijMenuCheckBackgroundL20 = lighten(@selectionBackground,20%,derived noAutoInverse)
 @ijMenuCheckBackgroundD10 = darken(@selectionBackground,10%,derived noAutoInverse)
 
-@ijTextBackgroundL3 = lighten(Panel.background,3%,lazy)
+@ijSeparatorLight = shade(@background,15%)
-@ijTextBackgroundL4 = lighten(Panel.background,4%,lazy)
+@ijSeparatorDark = tint(@background,25%)
 
-[Arc_Theme]CheckBoxMenuItem.foreground = lazy(MenuItem.foreground)
+@ijTextBackgroundL3 = lighten($Panel.background,3%)
-[Arc_Theme]PopupMenu.foreground = lazy(MenuItem.foreground)
+@ijTextBackgroundL4 = lighten($Panel.background,4%)
-[Arc_Theme]RadioButtonMenuItem.foreground = lazy(MenuItem.foreground)
-[Arc_Theme]ProgressBar.selectionBackground = #000
-[Arc_Theme]ProgressBar.selectionForeground = #fff
-[Arc_Theme]List.selectionInactiveForeground = #fff
-[Arc_Theme]Table.selectionInactiveForeground = #fff
-[Arc_Theme]Tree.selectionInactiveForeground = #fff
 
-[Arc_Theme_-_Orange]CheckBoxMenuItem.foreground = lazy(MenuItem.foreground)
+{Arc_Theme}@selectionInactiveForeground = @selectionForeground
-[Arc_Theme_-_Orange]PopupMenu.foreground = lazy(MenuItem.foreground)
+{Arc_Theme}CheckBoxMenuItem.foreground = $MenuItem.foreground
-[Arc_Theme_-_Orange]RadioButtonMenuItem.foreground = lazy(MenuItem.foreground)
+{Arc_Theme}PopupMenu.foreground = $MenuItem.foreground
-[Arc_Theme_-_Orange]ProgressBar.selectionBackground = #000
+{Arc_Theme}RadioButtonMenuItem.foreground = $MenuItem.foreground
-[Arc_Theme_-_Orange]ProgressBar.selectionForeground = #fff
-[Arc_Theme_-_Orange]List.selectionInactiveForeground = #fff
-[Arc_Theme_-_Orange]Table.selectionInactiveForeground = #fff
-[Arc_Theme_-_Orange]Tree.selectionInactiveForeground = #fff
 
-[Arc_Theme_Dark]CheckBoxMenuItem.foreground = lazy(MenuItem.foreground)
+{Arc_Theme_-_Orange}@selectionInactiveForeground = @selectionForeground
-[Arc_Theme_Dark]PopupMenu.foreground = lazy(MenuItem.foreground)
+{Arc_Theme_-_Orange}CheckBoxMenuItem.foreground = $MenuItem.foreground
-[Arc_Theme_Dark]RadioButtonMenuItem.foreground = lazy(MenuItem.foreground)
+{Arc_Theme_-_Orange}PopupMenu.foreground = $MenuItem.foreground
-[Arc_Theme_Dark]ProgressBar.selectionBackground = #ddd
+{Arc_Theme_-_Orange}RadioButtonMenuItem.foreground = $MenuItem.foreground
-[Arc_Theme_Dark]ProgressBar.selectionForeground = #ddd
-[Arc_Theme_Dark]ToolBar.separatorColor = lazy(Separator.foreground)
 
-[Arc_Theme_Dark_-_Orange]CheckBoxMenuItem.foreground = lazy(MenuItem.foreground)
+{Arc_Theme_Dark}CheckBoxMenuItem.foreground = $MenuItem.foreground
-[Arc_Theme_Dark_-_Orange]PopupMenu.foreground = lazy(MenuItem.foreground)
+{Arc_Theme_Dark}PopupMenu.foreground = $MenuItem.foreground
-[Arc_Theme_Dark_-_Orange]RadioButtonMenuItem.foreground = lazy(MenuItem.foreground)
+{Arc_Theme_Dark}RadioButtonMenuItem.foreground = $MenuItem.foreground
-[Arc_Theme_Dark_-_Orange]ProgressBar.selectionBackground = #ddd
+{Arc_Theme_Dark}ToolBar.background = @background
-[Arc_Theme_Dark_-_Orange]ProgressBar.selectionForeground = #fff
-[Arc_Theme_Dark_-_Orange]ToolBar.separatorColor = lazy(Separator.foreground)
 
-[Carbon]Table.selectionBackground = lazy(List.selectionBackground)
+{Arc_Theme_Dark_-_Orange}CheckBoxMenuItem.foreground = $MenuItem.foreground
-[Carbon]Table.selectionInactiveForeground = lazy(List.selectionInactiveForeground)
+{Arc_Theme_Dark_-_Orange}PopupMenu.foreground = $MenuItem.foreground
-[Carbon]TextField.background = @ijTextBackgroundL4
+{Arc_Theme_Dark_-_Orange}ProgressBar.selectionForeground = #fff
+{Arc_Theme_Dark_-_Orange}RadioButtonMenuItem.foreground = $MenuItem.foreground
+{Arc_Theme_Dark_-_Orange}ToolBar.background = @background
 
-[Cobalt_2]Component.accentColor = lazy(Component.focusColor)
+{Carbon}Separator.foreground = @ijSeparatorDark
-[Cobalt_2]CheckBox.icon.background = #002946
+{Carbon}ToolBar.separatorColor = $Separator.foreground
-[Cobalt_2]CheckBox.icon.checkmarkColor = #002946
+{Carbon}Table.selectionBackground = $List.selectionBackground
-[Cobalt_2]MenuItem.checkBackground = @ijMenuCheckBackgroundL10
+{Carbon}TextField.background = @ijTextBackgroundL4
-[Cobalt_2]MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL10
-[Cobalt_2]ComboBox.background = @ijTextBackgroundL3
-[Cobalt_2]ComboBox.buttonBackground = @ijTextBackgroundL3
-[Cobalt_2]TextField.background = @ijTextBackgroundL3
-[Cobalt_2]Table.background = lazy(List.background)
-[Cobalt_2]Tree.background = lazy(List.background)
 
-[Cyan_light]MenuItem.checkBackground = @ijMenuCheckBackgroundL20
+{Cobalt_2}@accentBaseColor = $ColorPalette.hue3
-[Cyan_light]MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL20
+{Cobalt_2}CheckBox.icon.background = @background
+{Cobalt_2}MenuItem.checkBackground = @ijMenuCheckBackgroundL10
+{Cobalt_2}MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL10
+{Cobalt_2}ComboBox.background = @ijTextBackgroundL3
+{Cobalt_2}Slider.thumbColor = $ProgressBar.foreground
+{Cobalt_2}Slider.disabledTrackColor = $Separator.foreground
+{Cobalt_2}TextField.background = @ijTextBackgroundL3
+{Cobalt_2}Table.background = $List.background
+{Cobalt_2}Tree.background = $List.background
 
-[Dark_Flat_Theme]*.inactiveForeground = #808080
+{Cyan_light}@disabledForeground = tint(@foreground,30%)
-[Dark_Flat_Theme]Component.accentColor = lazy(List.selectionBackground)
+{Cyan_light}*.disabledText = @disabledForeground
-[Dark_Flat_Theme]TableHeader.background = #3B3B3B
+{Cyan_light}*.disabledForeground = @disabledForeground
-[Dark_Flat_Theme]TextPane.foreground = lazy(TextField.foreground)
+{Cyan_light}*.inactiveForeground = @disabledForeground
-[Dark_Flat_Theme]CheckBoxMenuItem.selectionForeground = lazy(MenuItem.selectionForeground)
+{Cyan_light}Button.background = @buttonBackground
-[Dark_Flat_Theme]List.selectionForeground = lazy(Tree.selectionForeground)
+{Cyan_light}MenuItem.checkBackground = @ijMenuCheckBackgroundL20
-[Dark_Flat_Theme]RadioButtonMenuItem.selectionForeground = lazy(MenuItem.selectionForeground)
+{Cyan_light}MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL20
-[Dark_Flat_Theme]Separator.foreground = lazy(ToolBar.separatorColor)
 
-[Dark_purple]Slider.focusedColor = fade($Component.focusColor,70%,derived)
+{Dark_Flat_Theme}@accentBaseColor = $TabbedPane.underlineColor
+{Dark_Flat_Theme}@disabledForeground = #808080
+{Dark_Flat_Theme}*.disabledText = @disabledForeground
+{Dark_Flat_Theme}*.disabledForeground = @disabledForeground
+{Dark_Flat_Theme}*.inactiveForeground = @disabledForeground
+{Dark_Flat_Theme}TableHeader.background = #3B3B3B
+{Dark_Flat_Theme}CheckBoxMenuItem.selectionForeground = $MenuItem.selectionForeground
+{Dark_Flat_Theme}ComboBox.background = $TextField.background
+{Dark_Flat_Theme}ComboBox.buttonBackground = $ComboBox.background
+{Dark_Flat_Theme}List.selectionForeground = $Tree.selectionForeground
+{Dark_Flat_Theme}ProgressBar.selectionForeground = @foreground
+{Dark_Flat_Theme}RadioButtonMenuItem.selectionForeground = $MenuItem.selectionForeground
+{Dark_Flat_Theme}Separator.foreground = @ijSeparatorDark
+{Dark_Flat_Theme}Slider.trackColor = $ProgressBar.background
+{Dark_Flat_Theme}Slider.thumbColor = fade($ProgressBar.foreground,100%)
+{Dark_Flat_Theme}TextPane.foreground = $TextField.foreground
+{Dark_Flat_Theme}ToggleButton.foreground = $Button.foreground
 
-[Dracula---Zihan_Ma]Component.accentColor = lazy(Component.focusColor)
+{Dracula---Zihan_Ma}CheckBox.icon.background = @background
-[Dracula---Zihan_Ma]ComboBox.selectionBackground = lazy(List.selectionBackground)
+{Dracula---Zihan_Ma}ComboBox.selectionBackground = $List.selectionBackground
-[Dracula---Zihan_Ma]ProgressBar.selectionBackground = #fff
+{Dracula---Zihan_Ma}ProgressBar.selectionBackground = #fff
-[Dracula---Zihan_Ma]ProgressBar.selectionForeground = #fff
+{Dracula---Zihan_Ma}ProgressBar.selectionForeground = #fff
+{Dracula---Zihan_Ma}Slider.trackColor = $?ColorPalette.selectionBackground
+{Dracula---Zihan_Ma}ToggleButton.foreground = $Button.foreground
 
-[Gradianto_Dark_Fuchsia]*.selectionBackground = #8452a7
+{Gradianto_Dark_Fuchsia}MenuItem.checkBackground = @ijMenuCheckBackgroundL10
-[Gradianto_Dark_Fuchsia]*.selectionInactiveBackground = #562C6A
+{Gradianto_Dark_Fuchsia}MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL10
-[Gradianto_Dark_Fuchsia]MenuItem.checkBackground = @ijMenuCheckBackgroundL10
+{Gradianto_Dark_Fuchsia}TextField.background = @ijTextBackgroundL4
-[Gradianto_Dark_Fuchsia]MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL10
+{Gradianto_Dark_Fuchsia}Tree.background = $List.background
-[Gradianto_Dark_Fuchsia]TextField.background = @ijTextBackgroundL4
+{Gradianto_Dark_Fuchsia}Tree.selectionInactiveBackground = $List.selectionInactiveBackground
-[Gradianto_Dark_Fuchsia]Tree.background = lazy(List.background)
+{Gradianto_Dark_Fuchsia}Separator.foreground = @ijSeparatorDark
-[Gradianto_Dark_Fuchsia]Separator.foreground = lazy(ScrollBar.track)
+{Gradianto_Dark_Fuchsia}ToolBar.separatorColor = $Separator.foreground
-[Gradianto_Dark_Fuchsia]ToolBar.separatorColor = lazy(ScrollBar.track)
+{Gradianto_Dark_Fuchsia}ProgressBar.background = $ScrollBar.track
-[Gradianto_Dark_Fuchsia]ProgressBar.background = lazy(ScrollBar.track)
+{Gradianto_Dark_Fuchsia}Slider.trackColor = $ScrollBar.track
-[Gradianto_Dark_Fuchsia]Slider.trackColor = lazy(ScrollBar.track)
 
-[Gradianto_Deep_Ocean]TextField.background = @ijTextBackgroundL3
+{Gradianto_Deep_Ocean}Separator.foreground = @ijSeparatorDark
-[Gradianto_Deep_Ocean]Tree.background = lazy(List.background)
+{Gradianto_Deep_Ocean}ToolBar.separatorColor = $Separator.foreground
+{Gradianto_Deep_Ocean}TextField.background = @ijTextBackgroundL3
+{Gradianto_Deep_Ocean}Tree.background = $List.background
 
-[Gradianto_Midnight_Blue]ScrollBar.thumb = #533B6B
+{Gradianto_Midnight_Blue}ScrollBar.thumb = #533B6B
-[Gradianto_Midnight_Blue]Table.selectionForeground = lazy(List.selectionForeground)
+{Gradianto_Midnight_Blue}Separator.foreground = @ijSeparatorDark
-[Gradianto_Midnight_Blue]TextField.background = @ijTextBackgroundL4
+{Gradianto_Midnight_Blue}ToolBar.separatorColor = $Separator.foreground
-[Gradianto_Midnight_Blue]Tree.background = lazy(List.background)
+{Gradianto_Midnight_Blue}Table.selectionForeground = $List.selectionForeground
+{Gradianto_Midnight_Blue}TextField.background = @ijTextBackgroundL4
+{Gradianto_Midnight_Blue}Tree.background = $List.background
 
-[Gradianto_Nature_Green]Table.selectionForeground = lazy(List.selectionForeground)
+{Gradianto_Nature_Green}Separator.foreground = @ijSeparatorDark
-[Gradianto_Nature_Green]TextField.background = @ijTextBackgroundL4
+{Gradianto_Nature_Green}ToolBar.separatorColor = $Separator.foreground
+{Gradianto_Nature_Green}Table.selectionForeground = $List.selectionForeground
+{Gradianto_Nature_Green}TextField.background = @ijTextBackgroundL4
 
-[Gray]Separator.foreground = lazy(Slider.trackColor)
+{Gray}@disabledForeground = tint(@foreground,40%)
-[Gray]ToolBar.separatorColor = lazy(Slider.trackColor)
+{Gray}*.disabledText = @disabledForeground
+{Gray}*.disabledForeground = @disabledForeground
+{Gray}*.inactiveForeground = @disabledForeground
+{Gray}Button.background = @buttonBackground
+{Gray}Separator.foreground = @ijSeparatorLight
+{Gray}ToolBar.separatorColor = $Separator.foreground
 
-[Gruvbox_Dark_Hard]Component.accentColor = lazy(TabbedPane.underlineColor)
+{Gruvbox_Dark_Hard}@accentBaseColor = #4B6EAF
-[Gruvbox_Dark_Hard]ToggleButton.selectedBackground = $ToggleButton.selectedBackground
+{Gruvbox_Dark_Hard}ComboBox.background = @ijTextBackgroundL3
-[Gruvbox_Dark_Hard]ToggleButton.toolbar.selectedBackground = $ToggleButton.toolbar.selectedBackground
+{Gruvbox_Dark_Hard}ComboBox.buttonBackground = $ComboBox.background
-[Gruvbox_Dark_Hard]ComboBox.background = @ijTextBackgroundL3
+{Gruvbox_Dark_Hard}TextField.background = @ijTextBackgroundL3
-[Gruvbox_Dark_Hard]ComboBox.buttonBackground = @ijTextBackgroundL3
-[Gruvbox_Dark_Hard]TextField.background = @ijTextBackgroundL3
 
-[Gruvbox_Dark_Medium]Component.accentColor = lazy(TabbedPane.underlineColor)
+{Hiberbee_Dark}@disabledForeground = $ColorPalette.light3
-[Gruvbox_Dark_Medium]ToggleButton.selectedBackground = $ToggleButton.selectedBackground
+{Hiberbee_Dark}*.disabledText = @disabledForeground
-[Gruvbox_Dark_Medium]ToggleButton.toolbar.selectedBackground = $ToggleButton.toolbar.selectedBackground
+{Hiberbee_Dark}*.disabledForeground = @disabledForeground
-[Gruvbox_Dark_Medium]ComboBox.background = @ijTextBackgroundL3
+{Hiberbee_Dark}*.inactiveForeground = @disabledForeground
-[Gruvbox_Dark_Medium]ComboBox.buttonBackground = @ijTextBackgroundL3
+{Hiberbee_Dark}List.selectionInactiveBackground = $Table.selectionInactiveBackground
-[Gruvbox_Dark_Medium]TextField.background = @ijTextBackgroundL3
+{Hiberbee_Dark}ProgressBar.background = $Separator.foreground
+{Hiberbee_Dark}RadioButtonMenuItem.selectionForeground = $MenuItem.selectionForeground
+{Hiberbee_Dark}Slider.trackColor = $ColorPalette.light1
+{Hiberbee_Dark}Slider.trackColor = $ColorPalette.dark10
+{Hiberbee_Dark}Slider.thumbColor = @accentBaseColor
+{Hiberbee_Dark}ToggleButton.foreground = $Button.foreground
+{Hiberbee_Dark}ToolBar.background = @background
 
-[Gruvbox_Dark_Soft]Component.accentColor = lazy(TabbedPane.underlineColor)
+{High_Contrast}@accentBaseColor = $TabbedPane.underlineColor
-[Gruvbox_Dark_Soft]MenuItem.checkBackground = @ijMenuCheckBackgroundL10
+{High_Contrast}Slider.thumbBorderColor = $Slider.thumbColor
-[Gruvbox_Dark_Soft]MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL10
+{High_Contrast}Slider.focusedThumbBorderColor = @background
-[Gruvbox_Dark_Soft]ToggleButton.selectedBackground = $ToggleButton.selectedBackground
+{High_Contrast}Slider.focusedColor = $Component.focusColor
-[Gruvbox_Dark_Soft]ToggleButton.toolbar.selectedBackground = $ToggleButton.toolbar.selectedBackground
+{High_Contrast}Slider.focusWidth = 2
-[Gruvbox_Dark_Soft]ComboBox.background = @ijTextBackgroundL3
+{High_Contrast}ToggleButton.selectedBackground = @selectionBackground
-[Gruvbox_Dark_Soft]ComboBox.buttonBackground = @ijTextBackgroundL3
+{High_Contrast}ToggleButton.selectedForeground = @selectionForeground
-[Gruvbox_Dark_Soft]TextField.background = @ijTextBackgroundL3
+{High_Contrast}ToggleButton.disabledSelectedBackground = shade(@selectionBackground,50%)
-
+{High_Contrast}ToggleButton.toolbar.selectedBackground = @selectionBackground
-[Hiberbee_Dark]*.disabledForeground = #7F7E7D
+{High_Contrast}[style]Button.inTextField = \
-[Hiberbee_Dark]*.disabledText = #7F7E7D
-[Hiberbee_Dark]*.inactiveForeground = #7F7E7D
-[Hiberbee_Dark]ProgressBar.background = lazy(Separator.foreground)
-[Hiberbee_Dark]Slider.trackColor = lazy(Separator.foreground)
-[Hiberbee_Dark]TabbedPane.focusColor = #5A5A5A
-[Hiberbee_Dark]TabbedPane.selectedBackground = #434241
-[Hiberbee_Dark]TabbedPane.selectedForeground = #70D7FF
-[Hiberbee_Dark]ToggleButton.selectedBackground = $ToggleButton.selectedBackground
-[Hiberbee_Dark]ToggleButton.toolbar.selectedBackground = $ToggleButton.toolbar.selectedBackground
-[Hiberbee_Dark]Table.selectionInactiveBackground = lazy(List.selectionInactiveBackground)
-[Hiberbee_Dark]Tree.selectionBackground = lazy(List.selectionBackground)
-[Hiberbee_Dark]Tree.selectionInactiveBackground = lazy(List.selectionInactiveBackground)
-
-[High_contrast]Component.accentColor = lazy(Component.focusColor)
-[High_contrast]ToggleButton.selectedBackground = #fff
-[High_contrast]ToggleButton.selectedForeground = #000
-[High_contrast]ToggleButton.disabledSelectedBackground = #444
-[High_contrast]ToggleButton.toolbar.selectedBackground = #fff
-[High_contrast][style]Button.inTextField = \
 	toolbar.hoverBackground: #444; \
 	toolbar.pressedBackground: #666; \
-	toolbar.selectedBackground: #fff
+	toolbar.selectedBackground: @selectionBackground
-[High_contrast][style]ToggleButton.inTextField = $[High_contrast][style]Button.inTextField
 
-[Light_Flat]*.disabledForeground = #8C8C8C
+{Light_Flat}@accentBaseColor = $TabbedPane.underlineColor
-[Light_Flat]*.inactiveForeground = #8C8C8C
+{Light_Flat}@accentFocusColor = lighten(@accentBaseColor,15%)
-[Light_Flat]CheckBox.icon[filled].background = #fff
+{Light_Flat}@disabledForeground = #808080
-[Light_Flat]CheckBox.icon[filled].checkmarkColor = #fff
+{Light_Flat}*.disabledText = @disabledForeground
-[Light_Flat]Component.accentColor = lazy(TabbedPane.underlineColor)
+{Light_Flat}*.disabledForeground = @disabledForeground
-[Light_Flat]ComboBox.background = lazy(ComboBox.editableBackground)
+{Light_Flat}*.inactiveForeground = @disabledForeground
-[Light_Flat]ComboBox.buttonBackground = lazy(ComboBox.editableBackground)
+{Light_Flat}CheckBox.icon[filled].background = #fff
-[Light_Flat]Separator.foreground = lazy(ToolBar.separatorColor)
+{Light_Flat}CheckBox.icon[filled].checkmarkColor = #fff
-[Light_Flat]TableHeader.background = #E5E5E9
+{Light_Flat}ComboBox.background = $ComboBox.editableBackground
-[Light_Flat]TextPane.foreground = lazy(TextField.foreground)
+{Light_Flat}ComboBox.buttonBackground = $ComboBox.background
-[Light_Flat]CheckBoxMenuItem.selectionForeground = lazy(MenuItem.selectionForeground)
+{Light_Flat}ProgressBar.selectionForeground = @foreground
-[Light_Flat]RadioButtonMenuItem.selectionForeground = lazy(MenuItem.selectionForeground)
+{Light_Flat}Separator.foreground = @ijSeparatorLight
+{Light_Flat}TableHeader.background = #E5E5E9
+{Light_Flat}TextPane.foreground = $TextField.foreground
+{Light_Flat}ToggleButton.foreground = $Button.foreground
+{Light_Flat}CheckBoxMenuItem.selectionForeground = $MenuItem.selectionForeground
+{Light_Flat}RadioButtonMenuItem.selectionForeground = $MenuItem.selectionForeground
 
-[Monocai]Button.default.foreground = #2D2A2F
+{Monocai}@accentUnderlineColor = @accentBaseColor
-[Monocai]MenuItem.checkBackground = @ijMenuCheckBackgroundL10
+{Monocai}*.acceleratorForeground = @menuAcceleratorForeground
-[Monocai]MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL10
+{Monocai}*.acceleratorSelectionForeground = @menuAcceleratorSelectionForeground
-@Monocai.acceleratorForeground = lazy(MenuItem.disabledForeground)
+{Monocai}Button.default.foreground = @background
-@Monocai.acceleratorSelectionForeground = lighten(MenuItem.disabledForeground,10%,lazy)
+{Monocai}MenuItem.checkBackground = @ijMenuCheckBackgroundL10
-[Monocai]CheckBoxMenuItem.acceleratorForeground = @Monocai.acceleratorForeground
+{Monocai}TabbedPane.underlineColor = @accentUnderlineColor
-[Monocai]CheckBoxMenuItem.acceleratorSelectionForeground = @Monocai.acceleratorSelectionForeground
+{Monocai}TextField.background = @ijTextBackgroundL4
-[Monocai]Menu.acceleratorForeground = @Monocai.acceleratorForeground
+@Monocai.selectionBackground = $TextField.selectionBackground
-[Monocai]Menu.acceleratorSelectionForeground = @Monocai.acceleratorSelectionForeground
+{Monocai}ComboBox.selectionBackground = @Monocai.selectionBackground
-[Monocai]MenuItem.acceleratorForeground = @Monocai.acceleratorForeground
+{Monocai}List.selectionBackground = @Monocai.selectionBackground
-[Monocai]MenuItem.acceleratorSelectionForeground = @Monocai.acceleratorSelectionForeground
+{Monocai}Table.selectionBackground = @Monocai.selectionBackground
-[Monocai]RadioButtonMenuItem.acceleratorForeground = @Monocai.acceleratorForeground
+{Monocai}Tree.selectionBackground = @Monocai.selectionBackground
-[Monocai]RadioButtonMenuItem.acceleratorSelectionForeground = @Monocai.acceleratorSelectionForeground
+@Monocai.selectionInactiveBackground = $MenuItem.selectionBackground
-[Monocai]TextField.background = @ijTextBackgroundL4
+{Monocai}List.selectionInactiveBackground = @Monocai.selectionInactiveBackground
-@Monocai.selectionBackground = lazy(TextField.selectionBackground)
+{Monocai}Table.selectionInactiveBackground = @Monocai.selectionInactiveBackground
-[Monocai]ComboBox.selectionBackground = @Monocai.selectionBackground
+{Monocai}Tree.selectionInactiveBackground = @Monocai.selectionInactiveBackground
-[Monocai]List.selectionBackground = @Monocai.selectionBackground
-[Monocai]Table.selectionBackground = @Monocai.selectionBackground
-[Monocai]Tree.selectionBackground = @Monocai.selectionBackground
-@Monocai.selectionInactiveBackground = lazy(MenuItem.selectionBackground)
-[Monocai]List.selectionInactiveBackground = @Monocai.selectionInactiveBackground
-[Monocai]Table.selectionInactiveBackground = @Monocai.selectionInactiveBackground
-[Monocai]Tree.selectionInactiveBackground = @Monocai.selectionInactiveBackground
 
-[Monokai_Pro---Subtheme]Table.selectionInactiveForeground = lazy(List.selectionInactiveForeground)
+{Monokai_Pro---Subtheme}@disabledForeground = shade(@foreground,40%)
-[Monokai_Pro---Subtheme]Tree.selectionBackground = lazy(List.selectionBackground)
+{Monokai_Pro---Subtheme}*.disabledText = @disabledForeground
-[Monokai_Pro---Subtheme]Separator.foreground = lazy(Slider.trackColor)
+{Monokai_Pro---Subtheme}*.disabledForeground = @disabledForeground
-[Monokai_Pro---Subtheme]ToolBar.separatorColor = lazy(Slider.trackColor)
+{Monokai_Pro---Subtheme}*.inactiveForeground = @disabledForeground
+{Monokai_Pro---Subtheme}ProgressBar.selectionBackground = #fff
+{Monokai_Pro---Subtheme}Table.selectionInactiveForeground = $List.selectionInactiveForeground
+{Monokai_Pro---Subtheme}Tree.selectionBackground = $List.selectionBackground
+{Monokai_Pro---Subtheme}ToggleButton.foreground = $Button.foreground
+{Monokai_Pro---Subtheme}Separator.foreground = @ijSeparatorDark
+{Monokai_Pro---Subtheme}ToolBar.separatorColor = $Separator.foreground
+{Monokai_Pro---Subtheme}ToolBar.background = @background
 
-[Nord]*.inactiveForeground = #616E88
+{Nord}@disabledForeground = #616E88
-[Nord]MenuItem.checkBackground = @ijMenuCheckBackgroundL10
+{Nord}*.disabledText = @disabledForeground
-[Nord]MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL10
+{Nord}*.disabledForeground = @disabledForeground
-[Nord]List.selectionBackground = lazy(Tree.selectionBackground)
+{Nord}*.inactiveForeground = @disabledForeground
-[Nord]List.selectionForeground = lazy(Tree.selectionForeground)
+{Nord}MenuItem.checkBackground = @ijMenuCheckBackgroundL10
-[Nord]Table.selectionBackground = lazy(Tree.selectionBackground)
+{Nord}MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL10
-[Nord]Table.selectionForeground = lazy(Tree.selectionForeground)
+{Nord}RadioButtonMenuItem.selectionBackground = $MenuItem.selectionBackground
-[Nord]TextField.selectionBackground = lazy(Tree.selectionBackground)
+{Nord}ProgressBar.selectionBackground = @foreground
-[Nord]TextField.selectionForeground = lazy(Tree.selectionForeground)
+{Nord}ProgressBar.selectionForeground = @background
-[Nord]Tree.selectionInactiveForeground = lazy(List.selectionInactiveForeground)
+{Nord}List.selectionBackground = $Tree.selectionBackground
+{Nord}List.selectionForeground = $Tree.selectionForeground
+{Nord}Table.selectionBackground = $Tree.selectionBackground
+{Nord}Table.selectionForeground = $Tree.selectionForeground
+{Nord}TextField.selectionBackground = $Tree.selectionBackground
+{Nord}TextField.selectionForeground = $Tree.selectionForeground
+{Nord}Tree.selectionInactiveForeground = $List.selectionInactiveForeground
 
-[NotReallyMDTheme]*.selectionInactiveBackground = #21384E
+{NotReallyMDTheme}*.selectionInactiveBackground = #21384E
-[NotReallyMDTheme]ToolBar.separatorColor = lazy(Separator.foreground)
+{NotReallyMDTheme}ToolBar.separatorColor = $Separator.foreground
 
-[One_Dark]List.selectionInactiveForeground = lazy(Tree.selectionInactiveForeground)
+{One_Dark}MenuItem.checkBackground = @ijMenuCheckBackgroundL10
-[One_Dark]MenuItem.checkBackground = @ijMenuCheckBackgroundL10
+{One_Dark}MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL10
-[One_Dark]MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL10
+{One_Dark}ProgressBar.background = $Separator.foreground
-[One_Dark]ProgressBar.background = lazy(Separator.foreground)
+{One_Dark}ProgressBar.selectionForeground = #fff
-[One_Dark]Slider.trackColor = lazy(Separator.foreground)
+{One_Dark}Table.background = $Tree.background
-[One_Dark]Slider.focusedColor = fade(#568af2,40%)
+{One_Dark}Table.selectionBackground = $Tree.selectionBackground
-[One_Dark]Table.background = lazy(Tree.background)
+{One_Dark}TextField.selectionBackground = $List.selectionBackground
-[One_Dark]Table.selectionBackground = lazy(Tree.selectionBackground)
+{One_Dark}Tree.selectionForeground = $List.selectionForeground
-[One_Dark]TextField.selectionBackground = lazy(List.selectionBackground)
-[One_Dark]Tree.selectionForeground = lazy(List.selectionForeground)
 
-[Solarized_Dark---4lex4]*.inactiveForeground = #657B83
+{Solarized_Dark---4lex4}@accentBaseColor = $TabbedPane.underlineColor
-[Solarized_Dark---4lex4]Component.accentColor = lazy(TabbedPane.underlineColor)
+{Solarized_Dark---4lex4}*.acceleratorForeground = @menuAcceleratorForeground
-[Solarized_Dark---4lex4]ComboBox.background = lazy(ComboBox.editableBackground)
+{Solarized_Dark---4lex4}ComboBox.background = $ComboBox.editableBackground
-[Solarized_Dark---4lex4]ComboBox.buttonBackground = lazy(ComboBox.editableBackground)
+{Solarized_Dark---4lex4}ComboBox.buttonBackground = $ComboBox.editableBackground
-[Solarized_Dark---4lex4]Slider.focusedColor = fade($Component.focusColor,80%,derived)
+{Solarized_Dark---4lex4}Slider.disabledTrackColor = $ColorPalette.colorSeparator
-[Solarized_Dark---4lex4]ToolBar.separatorColor = lazy(Separator.foreground)
 
-[Solarized_Light---4lex4]*.inactiveForeground = #839496
+{Solarized_Light---4lex4}@accentBaseColor = $TabbedPane.underlineColor
-[Solarized_Light---4lex4]Button.default.hoverBackground = darken($Button.default.background,3%,derived)
+{Solarized_Light---4lex4}Slider.thumbColor = $ProgressBar.foreground
-[Solarized_Light---4lex4]Component.accentColor = lazy(TabbedPane.underlineColor)
+{Solarized_Light---4lex4}Slider.disabledTrackColor = $ColorPalette.colorSeparator
 
-[Spacegray]ComboBox.background = @ijTextBackgroundL4
+{Spacegray}ComboBox.background = @ijTextBackgroundL4
-[Spacegray]ComboBox.buttonBackground = @ijTextBackgroundL4
+{Spacegray}ComboBox.buttonBackground = $ComboBox.background
-[Spacegray]TextField.background = @ijTextBackgroundL4
+{Spacegray}TextField.background = @ijTextBackgroundL4
-[Spacegray]TextField.selectionBackground = lazy(Tree.selectionBackground)
-[Spacegray]TextField.selectionForeground = lazy(Tree.selectionForeground)
 
-[vuesion-theme]*.disabledForeground = #8C8C8C
+{vuesion-theme}@accentBaseColor = $TabbedPane.underlineColor
-[vuesion-theme]*.disabledText = #8C8C8C
+{vuesion-theme}@disabledForeground = #8C8C8C
-[vuesion-theme]*.inactiveForeground = #8C8C8C
+{vuesion-theme}*.disabledText = @disabledForeground
-[vuesion-theme]Component.accentColor = lazy(Button.default.endBackground)
+{vuesion-theme}*.disabledForeground = @disabledForeground
-[vuesion-theme]MenuItem.checkBackground = @ijMenuCheckBackgroundL10
+{vuesion-theme}*.inactiveForeground = @disabledForeground
-[vuesion-theme]MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL10
+{vuesion-theme}MenuItem.checkBackground = @ijMenuCheckBackgroundL10
-[vuesion-theme]Slider.trackValueColor = #ececee
+{vuesion-theme}MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL10
-[vuesion-theme]Slider.trackColor = #303a45
+{vuesion-theme}ProgressBar.background = #303a45
-[vuesion-theme]Slider.thumbColor = #ececee
+{vuesion-theme}ProgressBar.foreground = #ececee
-[vuesion-theme]Slider.focusedColor = fade(#ececee,20%)
+{vuesion-theme}Slider.thumbColor = #ececee
-[vuesion-theme]ComboBox.background = @ijTextBackgroundL4
+{vuesion-theme}Slider.focusedColor = fade($Slider.thumbColor,20%)
-[vuesion-theme]ComboBox.buttonBackground = @ijTextBackgroundL4
+{vuesion-theme}ComboBox.background = @ijTextBackgroundL4
-[vuesion-theme]TextField.background = @ijTextBackgroundL4
+{vuesion-theme}ComboBox.buttonBackground = $ComboBox.background
-[vuesion-theme]TextField.selectionBackground = lighten(#303A45,15%)
+{vuesion-theme}TextField.background = @ijTextBackgroundL4
+{vuesion-theme}TextField.selectionBackground = lighten(#303A45,15%)
 
-[Xcode-Dark]TextField.background = @ijTextBackgroundL4
+{Xcode-Dark}@accentBaseColor = $List.selectionBackground
+{Xcode-Dark}TextField.background = @ijTextBackgroundL4
 
 
 # Material Theme UI Lite
 
-[light][author-Mallowigi]MenuItem.checkBackground = @ijMenuCheckBackgroundD10
+{author-Mallowigi}[light]controlHighlight = lighten($controlShadow,8%)
-[light][author-Mallowigi]MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundD10
+{author-Mallowigi}[light]controlLtHighlight = lighten($controlShadow,15%)
-[dark][author-Mallowigi]MenuItem.checkBackground = @ijMenuCheckBackgroundL20
+{author-Mallowigi}[light]controlDkShadow = darken($controlShadow,15%)
-[dark][author-Mallowigi]MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL20
+{author-Mallowigi}[dark]controlHighlight = darken($controlShadow,10%)
+{author-Mallowigi}[dark]controlLtHighlight = darken($controlShadow,15%)
+{author-Mallowigi}[dark]controlDkShadow = lighten($controlShadow,10%)
 
-[author-Mallowigi]Tree.selectionInactiveBackground = lazy(List.selectionInactiveBackground)
+{author-Mallowigi}Button.hoverBorderColor = $Button.focusedBorderColor
+{author-Mallowigi}HelpButton.hoverBorderColor = $Button.focusedBorderColor
 
-[Arc_Dark]ComboBox.selectionBackground = lazy(List.selectionBackground)
+{author-Mallowigi}[light]ToggleButton.selectedForeground = #000
-[Arc_Dark]Table.selectionBackground = lazy(List.selectionBackground)
+{author-Mallowigi}[dark]ToggleButton.selectedForeground = #fff
 
-[Atom_One_Dark]Separator.foreground = lazy(Slider.trackColor)
+{author-Mallowigi}[light]MenuItem.checkBackground = @ijMenuCheckBackgroundD10
-[Atom_One_Dark]ToolBar.separatorColor = lazy(Slider.trackColor)
+{author-Mallowigi}[light]MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundD10
+{author-Mallowigi}[dark]MenuItem.checkBackground = @ijMenuCheckBackgroundL20
+{author-Mallowigi}[dark]MenuItem.underlineSelectionCheckBackground = @ijMenuCheckBackgroundL20
 
-[Atom_One_Light]List.selectionBackground = lazy(Table.selectionBackground)
+{author-Mallowigi}[light]Separator.foreground = @ijSeparatorLight
-[Atom_One_Light]Tree.selectionBackground = lazy(Table.selectionBackground)
+{author-Mallowigi}[dark]Separator.foreground = @ijSeparatorDark
-[Atom_One_Light]TabbedPane.contentAreaColor = lazy(Separator.foreground)
+{author-Mallowigi}ProgressBar.selectionBackground = @foreground
+{author-Mallowigi}TabbedPane.selectedBackground = mix(@background,$ColorPalette.table,60%)
+{author-Mallowigi}ToolBar.separatorColor = $Separator.foreground
+{author-Mallowigi}Button.foreground = @foreground
+{author-Mallowigi}Tree.foreground = @foreground
 
-[Dracula---Mallowigi]*.selectionBackground = #44475A
-[Dracula---Mallowigi]List.selectionInactiveForeground = lazy(Tree.selectionInactiveForeground)
-[Dracula---Mallowigi]ProgressBar.selectionBackground = #fff
-[Dracula---Mallowigi]ProgressBar.selectionForeground = #fff
-[Dracula---Mallowigi]RadioButtonMenuItem.selectionForeground = lazy(CheckBoxMenuItem.selectionForeground)
-[Dracula---Mallowigi]Table.selectionForeground = lazy(List.selectionForeground)
-[Dracula---Mallowigi]Separator.foreground = lazy(Slider.trackColor)
-[Dracula---Mallowigi]ToolBar.separatorColor = lazy(Slider.trackColor)
 
-[GitHub]ProgressBar.selectionBackground = #222
+{Arc_Dark}ComboBox.selectionBackground = $List.selectionBackground
-[GitHub]ProgressBar.selectionForeground = #222
+{Arc_Dark}ProgressBar.selectionBackground = #fff
-[GitHub]TextField.background = @ijTextBackgroundL3
+{Arc_Dark}ProgressBar.selectionForeground = #fff
-[GitHub]List.selectionBackground = lazy(Table.selectionBackground)
+{Arc_Dark}Table.selectionBackground = $List.selectionBackground
-[GitHub]Tree.selectionBackground = lazy(Table.selectionBackground)
+{Arc_Dark}Tree.selectionInactiveBackground = $List.selectionInactiveBackground
 
-[GitHub_Dark]ComboBox.selectionBackground = lazy(Tree.selectionBackground)
+{Atom_One_Dark}ProgressBar.selectionBackground = #fff
-[GitHub_Dark]Table.selectionBackground = lazy(Tree.selectionBackground)
+{Atom_One_Dark}ProgressBar.selectionForeground = #fff
-[GitHub_Dark]Separator.foreground = lazy(Slider.trackColor)
+{Atom_One_Dark}List.selectionBackground = $Table.selectionBackground
-[GitHub_Dark]ToolBar.separatorColor = lazy(Slider.trackColor)
+{Atom_One_Dark}Tree.selectionBackground = $Table.selectionBackground
+{Atom_One_Dark}List.selectionInactiveBackground = $Tree.selectionInactiveBackground
+{Atom_One_Dark}Table.selectionInactiveBackground = $Tree.selectionInactiveBackground
 
-[Light_Owl]CheckBoxMenuItem.selectionForeground = lazy(CheckBoxMenuItem.foreground)
+{Atom_One_Light}@disabledForeground = shade($ColorPalette.dis,20%)
-[Light_Owl]ComboBox.selectionForeground = lazy(ComboBox.foreground)
+{Atom_One_Light}*.disabledText = @disabledForeground
-[Light_Owl]List.selectionInactiveForeground = lazy(List.foreground)
+{Atom_One_Light}*.disabledForeground = @disabledForeground
-[Light_Owl]Menu.selectionForeground = lazy(Menu.foreground)
+{Atom_One_Light}*.inactiveForeground = @disabledForeground
-[Light_Owl]MenuBar.selectionForeground = lazy(MenuBar.foreground)
+{Atom_One_Light}TabbedPane.contentAreaColor = $Separator.foreground
-[Light_Owl]MenuItem.selectionForeground = lazy(MenuItem.foreground)
-[Light_Owl]ProgressBar.selectionBackground = #111
-[Light_Owl]ProgressBar.selectionForeground = #fff
-[Light_Owl]Spinner.selectionForeground = lazy(Spinner.foreground)
-[Light_Owl]Table.selectionForeground = lazy(Table.foreground)
-[Light_Owl]TextField.selectionForeground = lazy(TextField.foreground)
-[Light_Owl]TextField.background = @ijTextBackgroundL3
-[Light_Owl]List.selectionBackground = lazy(Table.selectionBackground)
-[Light_Owl]Tree.selectionBackground = lazy(Table.selectionBackground)
 
-[Material_Darker]*.selectionBackground = lighten(#2D2D2D,15%)
+{Dracula---Mallowigi}ProgressBar.selectionBackground = #fff
-[Material_Darker]Separator.foreground = lazy(Slider.trackColor)
+{Dracula---Mallowigi}ProgressBar.selectionForeground = #fff
-[Material_Darker]ToolBar.separatorColor = lazy(Slider.trackColor)
+{Dracula---Mallowigi}List.selectionBackground = $Table.selectionBackground
+{Dracula---Mallowigi}Tree.selectionBackground = $Table.selectionBackground
+{Dracula---Mallowigi}List.selectionInactiveBackground = $Tree.selectionInactiveBackground
+{Dracula---Mallowigi}Table.selectionInactiveBackground = $Tree.selectionInactiveBackground
 
-[Material_Deep_Ocean]*.selectionBackground = lighten(#222533,15%)
+{GitHub}ProgressBar.selectionBackground = #222
-[Material_Deep_Ocean]Separator.foreground = lazy(Slider.trackColor)
+{GitHub}ProgressBar.selectionForeground = #222
-[Material_Deep_Ocean]ToolBar.separatorColor = lazy(Slider.trackColor)
+{GitHub}TextField.background = @ijTextBackgroundL3
+{GitHub}List.selectionBackground = $Table.selectionBackground
+{GitHub}Tree.selectionBackground = $Table.selectionBackground
+{GitHub}List.selectionInactiveBackground = $Tree.selectionInactiveBackground
+{GitHub}Table.selectionInactiveBackground = $Tree.selectionInactiveBackground
 
-[Material_Lighter]List.selectionInactiveForeground = lazy(Tree.selectionInactiveForeground)
+{GitHub_Dark}ComboBox.selectionBackground = $Tree.selectionBackground
-[Material_Lighter]ProgressBar.selectionBackground = #222
+{GitHub_Dark}ProgressBar.selectionForeground = #fff
-[Material_Lighter]ProgressBar.selectionForeground = #fff
+{GitHub_Dark}Slider.trackColor = lighten(#2b3036,5%)
-[Material_Lighter]ComboBox.selectionBackground = lazy(List.selectionBackground)
+{GitHub_Dark}Table.selectionBackground = $Tree.selectionBackground
-[Material_Lighter]Table.selectionBackground = lazy(List.selectionBackground)
+{GitHub_Dark}Tree.selectionInactiveBackground = $Table.selectionInactiveBackground
-[Material_Lighter]List.selectionForeground = lazy(Table.selectionForeground)
-[Material_Lighter]RadioButtonMenuItem.selectionForeground = lazy(Table.selectionForeground)
-[Material_Lighter]Tree.selectionForeground = lazy(Table.selectionForeground)
 
-[Material_Oceanic]ProgressBar.selectionBackground = #ddd
+{Light_Owl}@disabledForeground = shade($ColorPalette.dis,10%)
-[Material_Oceanic]ProgressBar.selectionForeground = #ddd
+{Light_Owl}*.disabledText = @disabledForeground
-[Material_Oceanic]Separator.foreground = lazy(Slider.trackColor)
+{Light_Owl}*.disabledForeground = @disabledForeground
-[Material_Oceanic]ToolBar.separatorColor = lazy(Slider.trackColor)
+{Light_Owl}*.inactiveForeground = @disabledForeground
+{Light_Owl}CheckBoxMenuItem.selectionForeground = $CheckBoxMenuItem.foreground
+{Light_Owl}ComboBox.selectionForeground = $ComboBox.foreground
+{Light_Owl}List.selectionInactiveForeground = $Table.selectionInactiveForeground
+{Light_Owl}Menu.selectionForeground = $Menu.foreground
+{Light_Owl}MenuBar.selectionForeground = $MenuBar.foreground
+{Light_Owl}MenuItem.selectionForeground = $MenuItem.foreground
+{Light_Owl}Table.selectionForeground = $List.selectionForeground
+{Light_Owl}TextField.selectionForeground = $TextField.foreground
+{Light_Owl}TextField.background = @ijTextBackgroundL3
+{Light_Owl}List.selectionBackground = $Table.selectionBackground
+{Light_Owl}Tree.selectionBackground = $Table.selectionBackground
+{Light_Owl}List.selectionInactiveBackground = $Tree.selectionInactiveBackground
+{Light_Owl}Table.selectionInactiveBackground = $Tree.selectionInactiveBackground
 
-[Material_Palenight]ProgressBar.selectionBackground = #ddd
+{Material_Darker}@disabledForeground = tint($ColorPalette.dis,30%)
-[Material_Palenight]ProgressBar.selectionForeground = #ddd
+{Material_Darker}*.disabledText = @disabledForeground
-[Material_Palenight]List.selectionBackground = lazy(Table.selectionBackground)
+{Material_Darker}*.disabledForeground = @disabledForeground
-[Material_Palenight]Tree.selectionBackground = lazy(Table.selectionBackground)
+{Material_Darker}*.inactiveForeground = @disabledForeground
-[Material_Palenight]Separator.foreground = lazy(Slider.trackColor)
+{Material_Darker}*.selectionBackground = lighten($ColorPalette.tree,15%)
-[Material_Palenight]ToolBar.separatorColor = lazy(Slider.trackColor)
+{Material_Darker}ProgressBar.selectionForeground = #fff
+{Material_Darker}Tree.selectionInactiveBackground = $List.selectionInactiveBackground
 
-[Monokai_Pro---Mallowigi]List.selectionForeground = lazy(Table.selectionForeground)
+{Material_Deep_Ocean}@disabledForeground = tint($ColorPalette.dis,10%)
-[Monokai_Pro---Mallowigi]RadioButtonMenuItem.selectionForeground = lazy(Table.selectionForeground)
+{Material_Deep_Ocean}*.disabledText = @disabledForeground
-[Monokai_Pro---Mallowigi]Table.selectionInactiveForeground = lazy(List.selectionInactiveForeground)
+{Material_Deep_Ocean}*.disabledForeground = @disabledForeground
-[Monokai_Pro---Mallowigi]Tree.selectionForeground = lazy(Table.selectionForeground)
+{Material_Deep_Ocean}*.inactiveForeground = @disabledForeground
-[Monokai_Pro---Mallowigi]Tree.selectionInactiveForeground = lazy(List.selectionInactiveForeground)
+{Material_Deep_Ocean}*.selectionBackground = lighten($ColorPalette.tree,15%)
-[Monokai_Pro---Mallowigi]Separator.foreground = lazy(Slider.trackColor)
+{Material_Deep_Ocean}ProgressBar.selectionBackground = #fff
-[Monokai_Pro---Mallowigi]ToolBar.separatorColor = lazy(Slider.trackColor)
+{Material_Deep_Ocean}Slider.trackColor = lighten(#1A1C25,5%)
+{Material_Deep_Ocean}Tree.selectionInactiveBackground = $List.selectionInactiveBackground
 
-[Moonlight]ComboBox.selectionBackground = lazy(List.selectionBackground)
+{Material_Lighter}@disabledForeground = shade($ColorPalette.dis,30%)
-[Moonlight]Table.selectionBackground = lazy(List.selectionBackground)
+{Material_Lighter}*.disabledText = @disabledForeground
-[Moonlight]Separator.foreground = lazy(Slider.trackColor)
+{Material_Lighter}*.disabledForeground = @disabledForeground
-[Moonlight]ToolBar.separatorColor = lazy(Slider.trackColor)
+{Material_Lighter}*.inactiveForeground = @disabledForeground
+{Material_Lighter}ComboBox.selectionBackground = $List.selectionBackground
+{Material_Lighter}List.selectionForeground = $Table.selectionForeground
+{Material_Lighter}List.selectionInactiveForeground = $Table.selectionInactiveForeground
+{Material_Lighter}ProgressBar.selectionBackground = #222
+{Material_Lighter}RadioButtonMenuItem.selectionForeground = $Table.selectionForeground
+{Material_Lighter}Table.selectionBackground = $List.selectionBackground
+{Material_Lighter}Tree.selectionForeground = $Table.selectionForeground
+{Material_Lighter}Tree.selectionInactiveBackground = $List.selectionInactiveBackground
 
-[Night_Owl]ProgressBar.selectionBackground = #ddd
+{Material_Oceanic}@disabledForeground = tint($ColorPalette.dis,30%)
-[Night_Owl]ProgressBar.selectionForeground = #ddd
+{Material_Oceanic}*.disabledText = @disabledForeground
+{Material_Oceanic}*.disabledForeground = @disabledForeground
+{Material_Oceanic}*.inactiveForeground = @disabledForeground
+{Material_Oceanic}ProgressBar.selectionBackground = #ddd
+{Material_Oceanic}ProgressBar.selectionForeground = #ddd
+{Material_Oceanic}List.selectionBackground = $Table.selectionBackground
+{Material_Oceanic}Tree.selectionBackground = $Table.selectionBackground
+{Material_Oceanic}List.selectionInactiveBackground = $Tree.selectionInactiveBackground
+{Material_Oceanic}Table.selectionInactiveBackground = $Tree.selectionInactiveBackground
 
-[Solarized_Dark---Mallowigi]ProgressBar.selectionBackground = #ccc
+{Material_Palenight}@disabledForeground = tint($ColorPalette.dis,20%)
-[Solarized_Dark---Mallowigi]ProgressBar.selectionForeground = #ccc
+{Material_Palenight}*.disabledText = @disabledForeground
-[Solarized_Dark---Mallowigi]Separator.foreground = lazy(Slider.trackColor)
+{Material_Palenight}*.disabledForeground = @disabledForeground
-[Solarized_Dark---Mallowigi]ToolBar.separatorColor = lazy(Slider.trackColor)
+{Material_Palenight}*.inactiveForeground = @disabledForeground
+{Material_Palenight}ProgressBar.selectionBackground = #ddd
+{Material_Palenight}ProgressBar.selectionForeground = #ddd
+{Material_Palenight}List.selectionBackground = $Table.selectionBackground
+{Material_Palenight}Tree.selectionBackground = $Table.selectionBackground
+{Material_Palenight}List.selectionInactiveBackground = $Tree.selectionInactiveBackground
+{Material_Palenight}Table.selectionInactiveBackground = $Tree.selectionInactiveBackground
 
-[Solarized_Light---Mallowigi]ProgressBar.selectionBackground = #222
+{Monokai_Pro---Mallowigi}@disabledForeground = tint($ColorPalette.dis,20%)
-[Solarized_Light---Mallowigi]ProgressBar.selectionForeground = #fff
+{Monokai_Pro---Mallowigi}*.disabledText = @disabledForeground
-[Solarized_Light---Mallowigi]ComboBox.selectionBackground = lazy(List.selectionBackground)
+{Monokai_Pro---Mallowigi}*.disabledForeground = @disabledForeground
-[Solarized_Light---Mallowigi]Table.selectionBackground = lazy(List.selectionBackground)
+{Monokai_Pro---Mallowigi}*.inactiveForeground = @disabledForeground
-[Solarized_Light---Mallowigi]Separator.foreground = lazy(Slider.trackColor)
+{Monokai_Pro---Mallowigi}RadioButtonMenuItem.selectionForeground = $MenuItem.selectionForeground
-[Solarized_Light---Mallowigi]ToolBar.separatorColor = lazy(Slider.trackColor)
+{Monokai_Pro---Mallowigi}List.selectionForeground = $Table.selectionForeground
+{Monokai_Pro---Mallowigi}Tree.selectionForeground = $Table.selectionForeground
+{Monokai_Pro---Mallowigi}List.selectionInactiveForeground = $Table.selectionInactiveForeground
+{Monokai_Pro---Mallowigi}List.selectionBackground = $Table.selectionBackground
+{Monokai_Pro---Mallowigi}Tree.selectionBackground = $Table.selectionBackground
+{Monokai_Pro---Mallowigi}List.selectionInactiveBackground = $Tree.selectionInactiveBackground
+{Monokai_Pro---Mallowigi}Table.selectionInactiveBackground = $Tree.selectionInactiveBackground
+
+{Moonlight}ComboBox.selectionBackground = $List.selectionBackground
+{Moonlight}ProgressBar.selectionForeground = #000
+{Moonlight}Table.selectionBackground = $List.selectionBackground
+{Moonlight}Tree.selectionInactiveBackground = $List.selectionInactiveBackground
+
+{Solarized_Dark---Mallowigi}@disabledForeground = tint($ColorPalette.dis,20%)
+{Solarized_Dark---Mallowigi}*.disabledForeground = @disabledForeground
+{Solarized_Dark---Mallowigi}*.inactiveForeground = @disabledForeground
+{Solarized_Dark---Mallowigi}*.disabledText = @disabledForeground
+{Solarized_Dark---Mallowigi}ProgressBar.selectionBackground = #ccc
+{Solarized_Dark---Mallowigi}ProgressBar.selectionForeground = #ccc
+{Solarized_Dark---Mallowigi}Slider.trackColor = lighten(@background,10%)
+{Solarized_Dark---Mallowigi}Table.selectionBackground = $List.selectionBackground
+{Solarized_Dark---Mallowigi}Tree.selectionInactiveBackground = $List.selectionInactiveBackground
+
+{Solarized_Light---Mallowigi}@disabledForeground = tint(@foreground,30%)
+{Solarized_Light---Mallowigi}*.disabledForeground = @disabledForeground
+{Solarized_Light---Mallowigi}*.inactiveForeground = @disabledForeground
+{Solarized_Light---Mallowigi}*.disabledText = @disabledForeground
+{Solarized_Light---Mallowigi}ProgressBar.selectionBackground = #222
+{Solarized_Light---Mallowigi}ComboBox.selectionBackground = $List.selectionBackground
+{Solarized_Light---Mallowigi}Slider.disabledTrackColor = lighten($Slider.trackColor,5%)
+{Solarized_Light---Mallowigi}Table.selectionBackground = $List.selectionBackground
+{Solarized_Light---Mallowigi}Tree.selectionInactiveBackground = $List.selectionInactiveBackground
+{Solarized_Light---Mallowigi}Button.toolbar.selectedBackground = darken($@background,15%)
+{Solarized_Light---Mallowigi}ToggleButton.toolbar.selectedBackground = $Button.toolbar.selectedBackground

flatlaf-core/src/main/resources/com/formdev/flatlaf/themes/FlatMacDarkLaf.properties

@@ -112,6 +112,7 @@ Button.borderWidth = 0
 Button.disabledBackground = darken($Button.background,10%)
 
 Button.default.borderWidth = 0
+Button.default.foreground = contrast($Button.default.background, @background, @selectionForeground, 25%)
 
 Button.toolbar.hoverBackground = #fff1
 Button.toolbar.pressedBackground = #fff2
@@ -183,6 +184,7 @@ MenuBar.selectionEmbeddedInsets = 3,0,3,0
 MenuBar.selectionArc = 8
 MenuBar.selectionBackground = lighten(@menuBackground,15%,derived)
 MenuBar.selectionForeground = @foreground
+MenuBar.borderColor = over($Separator.foreground,$MenuBar.background)
 
 
 #---- MenuItem ----
@@ -293,6 +295,7 @@ TextPane.selectionForeground = @textSelectionForeground
 
 ToggleButton.disabledBackground = $Button.disabledBackground
 ToggleButton.selectedBackground = lighten($ToggleButton.background,20%,derived)
+ToggleButton.selectedForeground = lighten($ToggleButton.foreground,20%)
 
 ToggleButton.toolbar.selectedBackground = #fff3
 

flatlaf-core/src/main/resources/com/formdev/flatlaf/themes/FlatMacLightLaf.properties

@@ -79,7 +79,7 @@
 # general background and foreground (text color)
 @background = #f6f6f6
 @foreground = over(@nsControlTextColor,@background)
-@disabledForeground = over(@nsTertiaryLabelColor,@background)
+@disabledForeground = over(@nsSecondaryLabelColor,@background)
 
 # component background
 @buttonBackground = @nsControlColor
@@ -184,6 +184,7 @@ MenuBar.selectionEmbeddedInsets = 3,0,3,0
 MenuBar.selectionArc = 8
 MenuBar.selectionBackground = darken(@menuBackground,15%,derived)
 MenuBar.selectionForeground = @foreground
+MenuBar.borderColor = over($Separator.foreground,$MenuBar.background)
 
 
 #---- MenuItem ----

flatlaf-core/src/test/java/com/formdev/flatlaf/TestUIDefaultsLoader.java

@@ -17,6 +17,9 @@
 package com.formdev.flatlaf;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertThrowsExactly;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Font;
@@ -27,8 +30,16 @@ import javax.swing.border.Border;
 import javax.swing.UIDefaults.ActiveValue;
 import javax.swing.UIDefaults.LazyValue;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.function.Executable;
 import com.formdev.flatlaf.ui.FlatEmptyBorder;
 import com.formdev.flatlaf.ui.FlatLineBorder;
+import com.formdev.flatlaf.util.DerivedColor;
+import com.formdev.flatlaf.util.ColorFunctions.ColorFunction;
+import com.formdev.flatlaf.util.ColorFunctions.Fade;
+import com.formdev.flatlaf.util.ColorFunctions.HSLChange;
+import com.formdev.flatlaf.util.ColorFunctions.HSLIncreaseDecrease;
+import com.formdev.flatlaf.util.ColorFunctions.Mix;
+import com.formdev.flatlaf.util.ColorFunctions.Mix2;
 
 /**
  * @author Karl Tauber
@@ -84,10 +95,12 @@ public class TestUIDefaultsLoader
 	void parseBorders() {
 		Insets insets = new Insets( 1,2,3,4 );
 		assertBorderEquals( new FlatEmptyBorder( insets ), "1,2,3,4" );
+		assertBorderEquals( new FlatEmptyBorder( insets ), "1,2,3,4,,," );
 		assertBorderEquals( new FlatLineBorder( insets, Color.red ), "1,2,3,4,#f00" );
-		assertBorderEquals( new FlatLineBorder( insets, Color.red, 2.5f, 0 ), "1,2,3,4,#f00,2.5" );
+		assertBorderEquals( new FlatLineBorder( insets, Color.red, 2.5f, -1 ), "1,2,3,4,#f00,2.5" );
 		assertBorderEquals( new FlatLineBorder( insets, Color.red, 2.5f, 6 ), "1,2,3,4,#f00,2.5,6" );
 		assertBorderEquals( new FlatLineBorder( insets, Color.red, 1, 6 ), "1,2,3,4,#f00,,6" );
+		assertBorderEquals( new FlatLineBorder( insets, null, 1, 6 ), "1,2,3,4,,,6" );
 	}
 
 	private void assertBorderEquals( Border expected, String actualStyle ) {
@@ -178,6 +191,336 @@ public class TestUIDefaultsLoader
 		assertEquals( expected, ((LazyValue)UIDefaultsLoader.parseValue( "dummyIcon", value, null )).createValue( null ) );
 	}
 
+	@Test
+	void parseColorFunctions() {
+		// lighten
+		assertEquals( new Color( 0xff6666 ), parseColor( "lighten(#f00, 20%)" ) );
+		assertEquals( new Color( 0xff3333 ), parseColor( "lighten(#f00, 20%, relative)" ) );
+		assertEquals( new Color( 0xaaaaaa ), parseColor( "lighten(#ddd, 20%, autoInverse)" ) );
+		assertEquals( new Color( 0xb1b1b1 ), parseColor( "lighten(#ddd, 20%, relative autoInverse)" ) );
+
+		// darken
+		assertEquals( new Color( 0x990000 ), parseColor( "darken(#f00, 20%)" ) );
+		assertEquals( new Color( 0xcc0000 ), parseColor( "darken(#f00, 20%, relative)" ) );
+		assertEquals( new Color( 0x555555 ), parseColor( "darken(#222, 20%, autoInverse)" ) );
+		assertEquals( new Color( 0x292929 ), parseColor( "darken(#222, 20%, relative autoInverse)" ) );
+
+		// saturate
+		assertEquals( new Color( 0xf32e2e ), parseColor( "saturate(#d44, 20%)" ) );
+		assertEquals( new Color( 0xec3535 ), parseColor( "saturate(#d44, 20%, relative)" ) );
+		assertEquals( new Color( 0xc75a5a ), parseColor( "saturate(#d44, 20%, autoInverse)" ) );
+		assertEquals( new Color( 0xce5353 ), parseColor( "saturate(#d44, 20%, relative autoInverse)" ) );
+
+		// desaturate
+		assertEquals( new Color( 0x745858 ), parseColor( "desaturate(#844, 20%)" ) );
+		assertEquals( new Color( 0x814b4b ), parseColor( "desaturate(#844, 20%, relative)" ) );
+		assertEquals( new Color( 0x9c3030 ), parseColor( "desaturate(#844, 20%, autoInverse)" ) );
+		assertEquals( new Color( 0x8f3d3d ), parseColor( "desaturate(#844, 20%, relative autoInverse)" ) );
+
+		// fadein
+		assertEquals( new Color( 0xddff0000, true ), parseColor( "fadein(#f00a, 20%)" ) );
+		assertEquals( new Color( 0xccff0000, true ), parseColor( "fadein(#f00a, 20%, relative)" ) );
+		assertEquals( new Color( 0x77ff0000, true ), parseColor( "fadein(#f00a, 20%, autoInverse)" ) );
+		assertEquals( new Color( 0x88ff0000, true ), parseColor( "fadein(#f00a, 20%, relative autoInverse)" ) );
+
+		// fadeout
+		assertEquals( new Color( 0x11ff0000, true ), parseColor( "fadeout(#f004, 20%)" ) );
+		assertEquals( new Color( 0x36ff0000, true ), parseColor( "fadeout(#f004, 20%, relative)" ) );
+		assertEquals( new Color( 0x77ff0000, true ), parseColor( "fadeout(#f004, 20%, autoInverse)" ) );
+		assertEquals( new Color( 0x52ff0000, true ), parseColor( "fadeout(#f004, 20%, relative autoInverse)" ) );
+
+		// fade
+		assertEquals( new Color( 0x33ff0000, true ), parseColor( "fade(#f00, 20%)" ) );
+		assertEquals( new Color( 0xccff0000, true ), parseColor( "fade(#ff000010, 80%)" ) );
+
+		// spin
+		assertEquals( new Color( 0xffaa00 ), parseColor( "spin(#f00, 40)" ) );
+		assertEquals( new Color( 0xff00aa ), parseColor( "spin(#f00, -40)" ) );
+
+		// changeHue / changeSaturation / changeLightness / changeAlpha
+		assertEquals( new Color( 0xffaa00 ), parseColor( "changeHue(#f00, 40)" ) );
+		assertEquals( new Color( 0xb34d4d ), parseColor( "changeSaturation(#f00, 40%)" ) );
+		assertEquals( new Color( 0xcc0000 ), parseColor( "changeLightness(#f00, 40%)" ) );
+		assertEquals( new Color( 0x66ff0000, true ), parseColor( "changeAlpha(#f00, 40%)" ) );
+
+		// mix
+		assertEquals( new Color( 0x808000 ), parseColor( "mix(#f00, #0f0)" ) );
+		assertEquals( new Color( 0xbf4000 ), parseColor( "mix(#f00, #0f0, 75%)" ) );
+
+		// tint
+		assertEquals( new Color( 0xff80ff ), parseColor( "tint(#f0f)" ) );
+		assertEquals( new Color( 0xffbfff ), parseColor( "tint(#f0f, 75%)" ) );
+
+		// shade
+		assertEquals( new Color( 0x800080 ), parseColor( "shade(#f0f)" ) );
+		assertEquals( new Color( 0x400040 ), parseColor( "shade(#f0f, 75%)" ) );
+
+		// contrast
+		assertEquals( new Color( 0x0000ff ), parseColor( "contrast(#bbb, #00f, #0f0)" ) );
+		assertEquals( new Color( 0x00ff00 ), parseColor( "contrast(#444, #00f, #0f0)" ) );
+		assertEquals( new Color( 0x00ff00 ), parseColor( "contrast(#bbb, #00f, #0f0, 60%)" ) );
+
+		// rgb / rgba
+		assertEquals( new Color( 0x5a8120 ), parseColor( "rgb(90, 129, 32)" ) );
+		assertEquals( new Color( 0x5a8120 ), parseColor( "rgb(90, 129, 32)" ) );
+		assertEquals( new Color( 0x197fb2 ), parseColor( "rgb(10%,50%,70%)" ) );
+		assertEquals( new Color( 0x197f46 ), parseColor( "rgb(10%,50%,70)" ) );
+		assertEquals( new Color( 0x405a8120, true ), parseColor( "rgba(90, 129, 32, 64)" ) );
+		assertEquals( new Color( 0x335a8120, true ), parseColor( "rgba(90, 129, 32, 20%)" ) );
+
+		// hsl / hsla
+		assertEquals( new Color( 0x7fff00 ), parseColor( "hsl(90, 100%, 50%)" ) );
+		assertEquals( new Color( 0x337fff00, true ), parseColor( "hsla(90, 100%, 50%, 20%)" ) );
+	}
+
+	@Test
+	void parseLazyColorFunctions() {
+		// lighten
+		assertEquals( new Color( 0xff6666 ), parseColorLazy( "lighten(dummyColor, 20%, lazy)", new Color( 0xff0000 ) ) );
+
+		// darken
+		assertEquals( new Color( 0x990000 ), parseColorLazy( "darken(dummyColor, 20%, lazy)", new Color( 0xff0000 ) ) );
+
+		// saturate
+		assertEquals( new Color( 0xf32e2e ), parseColorLazy( "saturate(dummyColor, 20%, lazy)", new Color( 0xdd4444 ) ) );
+
+		// desaturate
+		assertEquals( new Color( 0x745858 ), parseColorLazy( "desaturate(dummyColor, 20%, lazy)", new Color( 0x884444 ) ) );
+
+		// fadein
+		assertEquals( new Color( 0xddff0000, true ), parseColorLazy( "fadein(dummyColor, 20%, lazy)", new Color( 0xaaff0000, true ) ) );
+
+		// fadeout
+		assertEquals( new Color( 0x11ff0000, true ), parseColorLazy( "fadeout(dummyColor, 20%, lazy)", new Color( 0x44ff0000, true ) ) );
+
+		// fade
+		assertEquals( new Color( 0x33ff0000, true ), parseColorLazy( "fade(dummyColor, 20%, lazy)", new Color( 0xff0000 ) ) );
+		assertEquals( new Color( 0xccff0000, true ), parseColorLazy( "fade(dummyColor, 80%, lazy)", new Color( 0x10ff0000, true ) ) );
+
+		// spin
+		assertEquals( new Color( 0xffaa00 ), parseColorLazy( "spin(dummyColor, 40, lazy)", new Color( 0xff0000 ) ) );
+		assertEquals( new Color( 0xff00aa ), parseColorLazy( "spin(dummyColor, -40, lazy)", new Color( 0xff0000 ) ) );
+
+		// changeHue / changeSaturation / changeLightness / changeAlpha
+		assertEquals( new Color( 0xffaa00 ), parseColorLazy( "changeHue(dummyColor, 40, lazy)", new Color( 0xff0000 ) ) );
+		assertEquals( new Color( 0xb34d4d ), parseColorLazy( "changeSaturation(dummyColor, 40%, lazy)", new Color( 0xff0000 ) ) );
+		assertEquals( new Color( 0xcc0000 ), parseColorLazy( "changeLightness(dummyColor, 40%, lazy)", new Color( 0xff0000 ) ) );
+		assertEquals( new Color( 0x66ff0000, true ), parseColorLazy( "changeAlpha(dummyColor, 40%, lazy)", new Color( 0xff0000 ) ) );
+
+		// mix
+		assertEquals( new Color( 0x808000 ), parseColorLazy( "mix(#f00, dummyColor, lazy)", new Color( 0x00ff00 ) ) );
+		assertEquals( new Color( 0xbf4000 ), parseColorLazy( "mix(#f00, dummyColor, 75%, lazy)", new Color( 0x00ff00 ) ) );
+
+		// tint
+		assertEquals( new Color( 0xff80ff ), parseColorLazy( "tint(dummyColor, lazy)", new Color( 0xff00ff ) ) );
+		assertEquals( new Color( 0xffbfff ), parseColorLazy( "tint(dummyColor, 75%, lazy)", new Color( 0xff00ff ) ) );
+
+		// shade
+		assertEquals( new Color( 0x800080 ), parseColorLazy( "shade(dummyColor, lazy)", new Color( 0xff00ff ) ) );
+		assertEquals( new Color( 0x400040 ), parseColorLazy( "shade(dummyColor, 75%, lazy)", new Color( 0xff00ff ) ) );
+	}
+
+	@Test
+	void parseDerivedColorFunctions() {
+		// mix
+		assertDerivedColorEquals( new Color( 0x808000 ), "mix(#f00, #0f0, derived)", new Mix2( Color.red, 50 ) );
+		assertDerivedColorEquals( new Color( 0xbf4000 ), "mix(#f00, #0f0, 75%, derived)", new Mix2( Color.red, 75 ) );
+
+		// tint
+		assertDerivedColorEquals( new Color( 0xff80ff ), "tint(#f0f, derived)", new Mix2( Color.white, 50 ) );
+		assertDerivedColorEquals( new Color( 0xffbfff ), "tint(#f0f, 75%, derived)", new Mix2( Color.white, 75 ) );
+
+		// shade
+		assertDerivedColorEquals( new Color( 0x800080 ), "shade(#f0f, derived)", new Mix2( Color.black, 50 ) );
+		assertDerivedColorEquals( new Color( 0x400040 ), "shade(#f0f, 75%, derived)", new Mix2( Color.black, 75 ) );
+
+
+		// lighten
+		assertDerivedColorEquals( new Color( 0xff6666 ), "lighten(#f00, 20%, derived)",                                 new HSLIncreaseDecrease( 2, true,  20, false, true  ) );
+		assertDerivedColorEquals( new Color( 0xff3333 ), "lighten(#f00, 20%, derived relative)",                        new HSLIncreaseDecrease( 2, true,  20, true,  true  ) );
+		assertDerivedColorEquals( new Color( 0xffffff ), "lighten(#ddd, 20%, derived noAutoInverse)",                   new HSLIncreaseDecrease( 2, true,  20, false, false ) );
+		assertDerivedColorEquals( new Color( 0xffffff ), "lighten(#ddd, 20%, derived relative noAutoInverse)",          new HSLIncreaseDecrease( 2, true,  20, true,  false ) );
+
+		// darken
+		assertDerivedColorEquals( new Color( 0x990000 ), "darken(#f00, 20%, derived)",                                  new HSLIncreaseDecrease( 2, false, 20, false, true  ) );
+		assertDerivedColorEquals( new Color( 0xcc0000 ), "darken(#f00, 20%, derived relative)",                         new HSLIncreaseDecrease( 2, false, 20, true,  true  ) );
+		assertDerivedColorEquals( new Color( 0x000000 ), "darken(#222, 20%, derived noAutoInverse)",                    new HSLIncreaseDecrease( 2, false, 20, false, false ) );
+		assertDerivedColorEquals( new Color( 0x1b1b1b ), "darken(#222, 20%, derived relative noAutoInverse)",           new HSLIncreaseDecrease( 2, false, 20, true,  false ) );
+
+		// saturate
+		assertDerivedColorEquals( new Color( 0xc75a5a ), "saturate(#d44, 20%, derived)",                                new HSLIncreaseDecrease( 1, true,  20, false, true  ) );
+		assertDerivedColorEquals( new Color( 0xce5353 ), "saturate(#d44, 20%, derived relative)",                       new HSLIncreaseDecrease( 1, true,  20, true,  true  ) );
+		assertDerivedColorEquals( new Color( 0xf32e2e ), "saturate(#d44, 20%, derived noAutoInverse)",                  new HSLIncreaseDecrease( 1, true,  20, false, false ) );
+		assertDerivedColorEquals( new Color( 0xec3535 ), "saturate(#d44, 20%, derived relative noAutoInverse)",         new HSLIncreaseDecrease( 1, true,  20, true,  false ) );
+
+		// desaturate
+		assertDerivedColorEquals( new Color( 0x9c3030 ), "desaturate(#844, 20%, derived)",                              new HSLIncreaseDecrease( 1, false, 20, false, true  ) );
+		assertDerivedColorEquals( new Color( 0x8f3d3d ), "desaturate(#844, 20%, derived relative)",                     new HSLIncreaseDecrease( 1, false, 20, true,  true  ) );
+		assertDerivedColorEquals( new Color( 0x745858 ), "desaturate(#844, 20%, derived noAutoInverse)",                new HSLIncreaseDecrease( 1, false, 20, false, false ) );
+		assertDerivedColorEquals( new Color( 0x814b4b ), "desaturate(#844, 20%, derived relative noAutoInverse)",       new HSLIncreaseDecrease( 1, false, 20, true,  false ) );
+
+		// fadein
+		assertDerivedColorEquals( new Color( 0x77ff0000, true ), "fadein(#f00a, 20%, derived)",                         new HSLIncreaseDecrease( 3, true,  20, false, true  ) );
+		assertDerivedColorEquals( new Color( 0x88ff0000, true ), "fadein(#f00a, 20%, derived relative)",                new HSLIncreaseDecrease( 3, true,  20, true,  true  ) );
+		assertDerivedColorEquals( new Color( 0xddff0000, true ), "fadein(#f00a, 20%, derived noAutoInverse)",           new HSLIncreaseDecrease( 3, true,  20, false, false ) );
+		assertDerivedColorEquals( new Color( 0xccff0000, true ), "fadein(#f00a, 20%, derived relative noAutoInverse)",  new HSLIncreaseDecrease( 3, true,  20, true,  false ) );
+
+		// fadeout
+		assertDerivedColorEquals( new Color( 0x77ff0000, true ), "fadeout(#f004, 20%, derived)",                        new HSLIncreaseDecrease( 3, false, 20, false, true  ) );
+		assertDerivedColorEquals( new Color( 0x52ff0000, true ), "fadeout(#f004, 20%, derived relative)",               new HSLIncreaseDecrease( 3, false, 20, true,  true  ) );
+		assertDerivedColorEquals( new Color( 0x11ff0000, true ), "fadeout(#f004, 20%, derived noAutoInverse)",          new HSLIncreaseDecrease( 3, false, 20, false, false ) );
+		assertDerivedColorEquals( new Color( 0x36ff0000, true ), "fadeout(#f004, 20%, derived relative noAutoInverse)", new HSLIncreaseDecrease( 3, false, 20, true,  false ) );
+
+		// fade
+		assertDerivedColorEquals( new Color( 0x33ff0000, true ), "fade(#f00, 20%, derived)",      new Fade( 20 ) );
+		assertDerivedColorEquals( new Color( 0xccff0000, true ), "fade(#ff000010, 80%, derived)", new Fade( 80 ) );
+
+		// spin
+		assertDerivedColorEquals( new Color( 0xffaa00 ), "spin(#f00, 40, derived)",  new HSLIncreaseDecrease( 0, true, 40, false, false ) );
+		assertDerivedColorEquals( new Color( 0xff00aa ), "spin(#f00, -40, derived)", new HSLIncreaseDecrease( 0, true, -40, false, false ) );
+
+		// changeHue / changeSaturation / changeLightness / changeAlpha
+		assertDerivedColorEquals( new Color( 0xffaa00 ), "changeHue(#f00, 40, derived)",            new HSLChange( 0, 40 ) );
+		assertDerivedColorEquals( new Color( 0xb34d4d ), "changeSaturation(#f00, 40%, derived)",    new HSLChange( 1, 40 ) );
+		assertDerivedColorEquals( new Color( 0xcc0000 ), "changeLightness(#f00, 40%, derived)",     new HSLChange( 2, 40 ) );
+		assertDerivedColorEquals( new Color( 0x66ff0000, true ), "changeAlpha(#f00, 40%, derived)", new HSLChange( 3, 40 ) );
+
+		// mix
+		assertDerivedColorEquals( new Color( 0x808000 ), "mix(#f00, #0f0, derived)",      new Mix2( new Color( 0xff0000 ), 50 ) );
+		assertDerivedColorEquals( new Color( 0xbf4000 ), "mix(#f00, #0f0, 75%, derived)", new Mix2( new Color( 0xff0000 ), 75 ) );
+
+		// tint
+		assertDerivedColorEquals( new Color( 0xff80ff ), "tint(#f0f, derived)",           new Mix2( new Color( 0xffffff ), 50 ) );
+		assertDerivedColorEquals( new Color( 0xffbfff ), "tint(#f0f, 75%, derived)",      new Mix2( new Color( 0xffffff ), 75 ) );
+
+		// shade
+		assertDerivedColorEquals( new Color( 0x800080 ), "shade(#f0f, derived)",          new Mix2( new Color( 0x000000 ), 50 ) );
+		assertDerivedColorEquals( new Color( 0x400040 ), "shade(#f0f, 75%, derived)",     new Mix2( new Color( 0x000000 ), 75 ) );
+	}
+
+	private void assertDerivedColorEquals( Color expectedColor, String actualStyle, ColorFunction... expectedFunctions ) {
+		Object actual = parseColor( actualStyle );
+		assertInstanceOf( DerivedColor.class, actual );
+		assertEquals( expectedColor, actual );
+
+		ColorFunction[] actualFunctions = ((DerivedColor)actual).getFunctions();
+		assertEquals( expectedFunctions.length, actualFunctions.length );
+		for( int i = 0; i < expectedFunctions.length; i++ )
+			assertColorFunctionEquals( expectedFunctions[i], actualFunctions[i] );
+	}
+
+	private void assertColorFunctionEquals( ColorFunction expected, ColorFunction actual ) {
+		assertEquals( expected.getClass(), actual.getClass() );
+
+		if( expected instanceof HSLIncreaseDecrease ) {
+			HSLIncreaseDecrease e = (HSLIncreaseDecrease) expected;
+			HSLIncreaseDecrease a = (HSLIncreaseDecrease) actual;
+			assertEquals( e.hslIndex, a.hslIndex );
+			assertEquals( e.increase, a.increase );
+			assertEquals( e.amount, a.amount );
+			assertEquals( e.relative, a.relative );
+			assertEquals( e.autoInverse, a.autoInverse );
+		} else if( expected instanceof HSLChange ) {
+			HSLChange e = (HSLChange) expected;
+			HSLChange a = (HSLChange) actual;
+			assertEquals( e.hslIndex, a.hslIndex );
+			assertEquals( e.value, a.value );
+		} else if( expected instanceof Fade ) {
+			Fade e = (Fade) expected;
+			Fade a = (Fade) actual;
+			assertEquals( e.amount, a.amount );
+		} else if( expected instanceof Mix ) {
+			Mix e = (Mix) expected;
+			Mix a = (Mix) actual;
+			assertEquals( e.color2, a.color2 );
+			assertEquals( e.weight, a.weight );
+		} else if( expected instanceof Mix2 ) {
+			Mix2 e = (Mix2) expected;
+			Mix2 a = (Mix2) actual;
+			assertEquals( e.color1, a.color1 );
+			assertEquals( e.weight, a.weight );
+		} else
+			assertTrue( false );
+	}
+
+	private Object parseColor( String value ) {
+		return UIDefaultsLoader.parseValue( "dummyColor", value, null );
+	}
+
+	private Object parseColorLazy( String value, Color actual ) {
+		UIManager.put( "dummyColor", actual );
+		Object v = UIDefaultsLoader.parseValue( "dummyColor", value, null );
+		assertInstanceOf( LazyValue.class, v );
+		return ((LazyValue)v).createValue( null );
+	}
+
+	//---- invalid values -----------------------------------------------------
+
+	@Test
+	void parseInvalidValue() {
+		assertThrows( new IllegalArgumentException( "invalid character 'abc'" ), () -> UIDefaultsLoader.parseValue( "dummyChar", "abc", null ) );
+		assertThrows( new NumberFormatException( "invalid integer or float '123abc'" ), () -> UIDefaultsLoader.parseValue( "dummyWidth", "123abc", null ) );
+		assertThrows( new NumberFormatException( "invalid integer or float '1.23abc'" ), () -> UIDefaultsLoader.parseValue( "dummyWidth", "1.23abc", null ) );
+
+		assertThrows( new IllegalArgumentException( "invalid insets '1,abc,3,4'" ), () -> UIDefaultsLoader.parseValue( "dummyInsets", "1,abc,3,4", null ) );
+		assertThrows( new IllegalArgumentException( "invalid insets '1,2,3'" ), () -> UIDefaultsLoader.parseValue( "dummyInsets", "1,2,3", null ) );
+		assertThrows( new IllegalArgumentException( "invalid size '1abc'" ), () -> UIDefaultsLoader.parseValue( "dummySize", "1abc", null ) );
+		assertThrows( new IllegalArgumentException( "invalid size '1'" ), () -> UIDefaultsLoader.parseValue( "dummySize", "1", null ) );
+		assertThrows( new IllegalArgumentException( "invalid color '#f0'" ), () -> UIDefaultsLoader.parseValue( "dummy", "#f0", null ) );
+		assertThrows( new IllegalArgumentException( "invalid color '#f0'" ), () -> UIDefaultsLoader.parseValue( "dummyColor", "#f0", null ) );
+	}
+
+	@Test
+	void parseInvalidValueWithJavaType() {
+		assertThrows( new IllegalArgumentException( "invalid boolean 'falseyy'" ), () -> UIDefaultsLoader.parseValue( "dummy", "falseyy", boolean.class ) );
+		assertThrows( new IllegalArgumentException( "invalid boolean 'falseyy'" ), () -> UIDefaultsLoader.parseValue( "dummy", "falseyy", Boolean.class ) );
+
+		assertThrows( new IllegalArgumentException( "invalid character 'abc'" ), () -> UIDefaultsLoader.parseValue( "dummyChar", "abc", char.class ) );
+		assertThrows( new IllegalArgumentException( "invalid character 'abc'" ), () -> UIDefaultsLoader.parseValue( "dummyChar", "abc", Character.class ) );
+		assertThrows( new NumberFormatException( "invalid integer '123abc'" ), () -> UIDefaultsLoader.parseValue( "dummyWidth", "123abc", int.class ) );
+		assertThrows( new NumberFormatException( "invalid integer '123abc'" ), () -> UIDefaultsLoader.parseValue( "dummyWidth", "123abc", Integer.class ) );
+		assertThrows( new NumberFormatException( "invalid float '1.23abc'" ), () -> UIDefaultsLoader.parseValue( "dummyWidth", "1.23abc", float.class ) );
+		assertThrows( new NumberFormatException( "invalid float '1.23abc'" ), () -> UIDefaultsLoader.parseValue( "dummyWidth", "1.23abc", Float.class ) );
+
+		assertThrows( new IllegalArgumentException( "invalid insets '1,abc,3'" ), () -> UIDefaultsLoader.parseValue( "dummyInsets", "1,abc,3", Insets.class ) );
+		assertThrows( new IllegalArgumentException( "invalid insets '1,2,3'" ), () -> UIDefaultsLoader.parseValue( "dummyInsets", "1,2,3", Insets.class ) );
+		assertThrows( new IllegalArgumentException( "invalid size '1abc'" ), () -> UIDefaultsLoader.parseValue( "dummySize", "1abc", Dimension.class ) );
+		assertThrows( new IllegalArgumentException( "invalid size '1'" ), () -> UIDefaultsLoader.parseValue( "dummySize", "1", Dimension.class ) );
+		assertThrows( new IllegalArgumentException( "invalid color '#f0'" ), () -> UIDefaultsLoader.parseValue( "dummy", "#f0", Color.class ) );
+		assertThrows( new IllegalArgumentException( "invalid color '#f0'" ), () -> UIDefaultsLoader.parseValue( "dummyColor", "#f0", Color.class ) );
+	}
+
+	@Test
+	void parseInvalidBorders() {
+		assertThrows( new IllegalArgumentException( "invalid border '1,abc,3,4' (invalid insets '1,abc,3,4')" ), () -> UIDefaultsLoader.parseValue( "dummyBorder", "1,abc,3,4", null ) );
+		assertThrows( new IllegalArgumentException( "invalid border '1,2,3' (invalid insets '1,2,3')" ), () -> UIDefaultsLoader.parseValue( "dummyBorder", "1,2,3", null ) );
+		assertThrows( new IllegalArgumentException( "invalid border '1,2,3,,,' (invalid insets '1,2,3,,,')" ), () -> UIDefaultsLoader.parseValue( "dummyBorder", "1,2,3,,,", null ) );
+		assertThrows( new IllegalArgumentException( "invalid border '1,2,3,4,#f0' (invalid color '#f0')" ), () -> UIDefaultsLoader.parseValue( "dummyBorder", "1,2,3,4,#f0", null ) );
+		assertThrows( new IllegalArgumentException( "invalid border '1,2,3,4,#f00,2.5abc' (invalid float '2.5abc')" ), () -> UIDefaultsLoader.parseValue( "dummyBorder", "1,2,3,4,#f00,2.5abc", null ) );
+		assertThrows( new IllegalArgumentException( "invalid border '1,2,3,4,#f00,2.5,6abc' (invalid integer '6abc')" ), () -> UIDefaultsLoader.parseValue( "dummyBorder", "1,2,3,4,#f00,2.5,6abc", null ) );
+	}
+
+	@Test
+	void parseInvalidFonts() {
+		// size
+		assertThrows( new IllegalArgumentException( "invalid font '12abc' (invalid integer '12abc')" ),    () -> UIDefaultsLoader.parseValue( "dummyFont", "12abc", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font '+12abc' (invalid integer '+12abc')" ),  () -> UIDefaultsLoader.parseValue( "dummyFont", "+12abc", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font '+3abc' (invalid integer '+3abc')" ),    () -> UIDefaultsLoader.parseValue( "dummyFont", "+3abc", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font '-4abc' (invalid integer '-4abc')" ),    () -> UIDefaultsLoader.parseValue( "dummyFont", "-4abc", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font '150abc%' (invalid integer '150abc')" ), () -> UIDefaultsLoader.parseValue( "dummyFont", "150abc%", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font 'bold 13abc Monospaced' (invalid integer '13abc')" ), () -> UIDefaultsLoader.parseValue( "dummyFont", "bold 13abc Monospaced", null ) );
+
+		// invalid combinations of styles
+		assertThrows( new IllegalArgumentException( "invalid font 'bold +italic': can not mix absolute style (e.g. 'bold') with derived style (e.g. '+italic')" ), () -> UIDefaultsLoader.parseValue( "dummyFont", "bold +italic", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font '+bold -bold': can not use '+bold' and '-bold'" ), () -> UIDefaultsLoader.parseValue( "dummyFont", "+bold -bold", null ) );
+		assertThrows( new IllegalArgumentException( "invalid font '+italic -italic': can not use '+italic' and '-italic'" ), () -> UIDefaultsLoader.parseValue( "dummyFont", "+italic -italic", null ) );
+	}
+
+	private void assertThrows( Throwable expected, Executable executable ) {
+		Throwable actual = assertThrowsExactly( expected.getClass(), executable );
+		assertEquals( expected.getMessage(), actual.getMessage() );
+	}
+
 	//---- class TestInstance -------------------------------------------------
 
 	@SuppressWarnings( "EqualsHashCode" ) // Error Prone

flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatButton.java

@@ -0,0 +1,404 @@
+/*
+ * Copyright 2025 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import java.awt.Color;
+import java.util.HashMap;
+import java.util.function.Function;
+import java.util.function.Predicate;
+import javax.swing.JButton;
+import javax.swing.JComponent;
+import javax.swing.JRootPane;
+import javax.swing.UIManager;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.FlatLaf;
+
+/**
+ * @author Karl Tauber
+ */
+public class TestFlatButton
+{
+	@BeforeAll
+	static void setup() {
+		String[] defs = {
+			"Button.background", "#000001",
+			"Button.foreground", "#000002",
+			"Button.focusedBackground", "#000003",
+			"Button.focusedForeground", "#000004",
+			"Button.hoverBackground", "#000005",
+			"Button.hoverForeground", "#000006",
+			"Button.pressedBackground", "#000007",
+			"Button.pressedForeground", "#000008",
+			"Button.selectedBackground", "#000009",
+			"Button.selectedForeground", "#00000a",
+			"Button.disabledBackground", "#00000b",
+			"Button.disabledText", "#00000c",
+			"Button.disabledSelectedBackground", "#00000d",
+			"Button.disabledSelectedForeground", "#00000e",
+
+			"Button.default.background", "#000101",
+			"Button.default.foreground", "#000102",
+			"Button.default.focusedBackground", "#000103",
+			"Button.default.focusedForeground", "#000104",
+			"Button.default.hoverBackground", "#000105",
+			"Button.default.hoverForeground", "#000106",
+			"Button.default.pressedBackground", "#000107",
+			"Button.default.pressedForeground", "#000108",
+
+			"Button.toolbar.hoverBackground", "#000201",
+			"Button.toolbar.hoverForeground", "#000202",
+			"Button.toolbar.pressedBackground", "#000203",
+			"Button.toolbar.pressedForeground", "#000204",
+			"Button.toolbar.selectedBackground", "#000205",
+			"Button.toolbar.selectedForeground", "#000206",
+			"Button.toolbar.disabledSelectedBackground", "#000207",
+			"Button.toolbar.disabledSelectedForeground", "#000208",
+		};
+
+		HashMap<String, String> globalExtraDefaults = new HashMap<>();
+		for( int i = 0; i < defs.length; i += 2 )
+			globalExtraDefaults.put( defs[i], defs[i+1] );
+		FlatLaf.setGlobalExtraDefaults( globalExtraDefaults );
+
+		TestUtils.setup( false );
+	}
+
+	@AfterAll
+	static void cleanup() {
+		TestUtils.cleanup();
+	}
+
+	@Test
+	void background() {
+		JButton b = new JButton();
+
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			UIManager.getColor( "Button.background" ),
+			UIManager.getColor( "Button.disabledBackground" ),
+			UIManager.getColor( "Button.focusedBackground" ),
+			UIManager.getColor( "Button.hoverBackground" ),
+			UIManager.getColor( "Button.pressedBackground" ) );
+
+		// selected
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			UIManager.getColor( "Button.selectedBackground" ),
+			UIManager.getColor( "Button.disabledSelectedBackground" ),
+			null,
+			null,
+			UIManager.getColor( "Button.pressedBackground" ) );
+		b.setSelected( false );
+
+		// default
+		JRootPane rootPane = new JRootPane();
+		rootPane.getContentPane().add( b );
+		rootPane.setDefaultButton( b );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			UIManager.getColor( "Button.default.background" ),
+			UIManager.getColor( "Button.disabledBackground" ),
+			UIManager.getColor( "Button.default.focusedBackground" ),
+			UIManager.getColor( "Button.default.hoverBackground" ),
+			UIManager.getColor( "Button.default.pressedBackground" ) );
+		rootPane.getContentPane().remove( b );
+	}
+
+	@Test
+	void foreground() {
+		JButton b = new JButton();
+
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			UIManager.getColor( "Button.foreground" ),
+			UIManager.getColor( "Button.disabledText" ),
+			UIManager.getColor( "Button.focusedForeground" ),
+			UIManager.getColor( "Button.hoverForeground" ),
+			UIManager.getColor( "Button.pressedForeground" ) );
+
+		// selected
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			UIManager.getColor( "Button.selectedForeground" ),
+			FlatUIUtils.getUIColor( "Button.disabledSelectedForeground", "Button.disabledText" ),
+			null,
+			null,
+			UIManager.getColor( "Button.pressedForeground" ) );
+		b.setSelected( false );
+
+		// default
+		JRootPane rootPane = new JRootPane();
+		rootPane.getContentPane().add( b );
+		rootPane.setDefaultButton( b );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			UIManager.getColor( "Button.default.foreground" ),
+			UIManager.getColor( "Button.disabledText" ),
+			UIManager.getColor( "Button.default.focusedForeground" ),
+			UIManager.getColor( "Button.default.hoverForeground" ),
+			UIManager.getColor( "Button.default.pressedForeground" ) );
+		rootPane.getContentPane().remove( b );
+	}
+
+	@Test
+	void backgroundExplicit() {
+		JButton b = new JButton();
+
+		Color c = new Color( 0x020001 );
+		b.setBackground( c );
+
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			c,
+			UIManager.getColor( "Button.disabledBackground" ),
+			null,
+			UIManager.getColor( "Button.hoverBackground" ),
+			UIManager.getColor( "Button.pressedBackground" ) );
+
+		// selected
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			UIManager.getColor( "Button.selectedBackground" ),
+			UIManager.getColor( "Button.disabledSelectedBackground" ),
+			null,
+			null,
+			UIManager.getColor( "Button.pressedBackground" ) );
+		b.setSelected( false );
+
+		// default
+		JRootPane rootPane = new JRootPane();
+		rootPane.getContentPane().add( b );
+		rootPane.setDefaultButton( b );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			c,
+			UIManager.getColor( "Button.disabledBackground" ),
+			null,
+			UIManager.getColor( "Button.default.hoverBackground" ),
+			UIManager.getColor( "Button.default.pressedBackground" ) );
+		rootPane.getContentPane().remove( b );
+	}
+
+	@Test
+	void foregroundExplicit() {
+		JButton b = new JButton();
+
+		Color c = new Color( 0x020001 );
+		b.setForeground( c );
+
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			c,
+			UIManager.getColor( "Button.disabledText" ),
+			null,
+			UIManager.getColor( "Button.hoverForeground" ),
+			UIManager.getColor( "Button.pressedForeground" ) );
+
+		// selected
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			c,
+			FlatUIUtils.getUIColor( "Button.disabledSelectedForeground", "Button.disabledText" ),
+			null,
+			null,
+			UIManager.getColor( "Button.pressedForeground" ) );
+		b.setSelected( false );
+
+		// default
+		JRootPane rootPane = new JRootPane();
+		rootPane.getContentPane().add( b );
+		rootPane.setDefaultButton( b );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			c,
+			UIManager.getColor( "Button.disabledText" ),
+			null,
+			UIManager.getColor( "Button.default.hoverForeground" ),
+			UIManager.getColor( "Button.default.pressedForeground" ) );
+		rootPane.getContentPane().remove( b );
+	}
+
+	@Test
+	void backgroundStyled() {
+		JButton b = new JButton();
+
+		b.putClientProperty( FlatClientProperties.STYLE,
+			"background: #020001;" +
+			"disabledBackground: #020002;" +
+			"focusedBackground: #020003;" +
+			"hoverBackground: #020004;" +
+			"pressedBackground: #020005;" +
+			"selectedBackground: #020006;" +
+			"disabledSelectedBackground: #020007;" );
+
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			new Color( 0x020001 ),
+			new Color( 0x020002 ),
+			new Color( 0x020003 ),
+			new Color( 0x020004 ),
+			new Color( 0x020005 ) );
+
+		// selected
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			new Color( 0x020006 ),
+			new Color( 0x020007 ),
+			null,
+			null,
+			new Color( 0x020005 ) );
+		b.setSelected( false );
+
+
+		Color c = new Color( 0x0a0001 );
+		b.setBackground( c );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			c,
+			new Color( 0x020002 ),
+			c,
+			new Color( 0x020004 ),
+			new Color( 0x020005 ) );
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			new Color( 0x020006 ),
+			new Color( 0x020007 ),
+			null,
+			null,
+			new Color( 0x020005 ) );
+		b.setSelected( false );
+
+
+		b = new JButton();
+		b.putClientProperty( FlatClientProperties.STYLE,
+			"default.background: #020101;" +
+			"disabledBackground: #020102;" +
+			"default.focusedBackground: #020103;" +
+			"default.hoverBackground: #020104;" +
+			"default.pressedBackground: #020105;" );
+
+		// default
+		JRootPane rootPane = new JRootPane();
+		rootPane.getContentPane().add( b );
+		rootPane.setDefaultButton( b );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getBackground( b2 ),
+			new Color( 0x020101 ),
+			new Color( 0x020102 ),
+			new Color( 0x020103 ),
+			new Color( 0x020104 ),
+			new Color( 0x020105 ) );
+		rootPane.getContentPane().remove( b );
+	}
+
+	@Test
+	void foregroundStyled() {
+		JButton b = new JButton();
+
+		b.putClientProperty( FlatClientProperties.STYLE,
+			"foreground: #020001;" +
+			"disabledText: #020002;" +
+			"focusedForeground: #020003;" +
+			"hoverForeground: #020004;" +
+			"pressedForeground: #020005;" +
+			"selectedForeground: #020006;" +
+			"disabledSelectedForeground: #020007;" );
+
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			new Color( 0x020001 ),
+			new Color( 0x020002 ),
+			new Color( 0x020003 ),
+			new Color( 0x020004 ),
+			new Color( 0x020005 ) );
+
+		// selected
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			new Color( 0x020006 ),
+			new Color( 0x020007 ),
+			null,
+			null,
+			new Color( 0x020005 ) );
+		b.setSelected( false );
+
+
+		Color c = new Color( 0x0a0001 );
+		b.setForeground( c );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			c,
+			new Color( 0x020002 ),
+			c,
+			new Color( 0x020004 ),
+			new Color( 0x020005 ) );
+		b.setSelected( true );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			c,
+			new Color( 0x020007 ),
+			null,
+			null,
+			new Color( 0x020005 ) );
+		b.setSelected( false );
+
+
+		b = new JButton();
+		b.putClientProperty( FlatClientProperties.STYLE,
+			"default.foreground: #020101;" +
+			"disabledText: #020102;" +
+			"default.focusedForeground: #020103;" +
+			"default.hoverForeground: #020104;" +
+			"default.pressedForeground: #020105;" );
+
+		// default
+		JRootPane rootPane = new JRootPane();
+		rootPane.getContentPane().add( b );
+		rootPane.setDefaultButton( b );
+		testButtonColors( b, b2 -> ((FlatButtonUI)b2.getUI()).getForeground( b2 ),
+			new Color( 0x020101 ),
+			new Color( 0x020102 ),
+			new Color( 0x020103 ),
+			new Color( 0x020104 ),
+			new Color( 0x020105 ) );
+		rootPane.getContentPane().remove( b );
+	}
+
+	private void testButtonColors( JButton b, Function<JButton, Color> f,
+		Color expectedEnabled, Color expectedDisabled, Color expectedFocused,
+		Color expectedHover, Color expectedPressed
+		)
+	{
+		assertEquals( expectedEnabled, f.apply( b ) );
+
+		// disabled
+		b.setEnabled( false );
+		assertEquals( expectedDisabled, f.apply( b ) );
+		b.setEnabled( true );
+
+		// focused
+		if( expectedFocused != null ) {
+			b.putClientProperty( FlatClientProperties.COMPONENT_FOCUS_OWNER, (Predicate<JComponent>) c -> true );
+			assertEquals( expectedFocused, f.apply( b ) );
+			b.putClientProperty( FlatClientProperties.COMPONENT_FOCUS_OWNER, null );
+		}
+
+		// hover
+		if( expectedHover != null ) {
+			b.getModel().setRollover( true );
+			assertEquals( expectedHover, f.apply( b ) );
+			b.getModel().setRollover( false );
+		}
+
+		// pressed
+		if( expectedPressed != null ) {
+			b.getModel().setPressed( true );
+			assertEquals( expectedPressed, f.apply( b ) );
+			b.getModel().setPressed( false );
+		}
+	}
+}

flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatHTML.java

@@ -0,0 +1,123 @@
+/*
+ * Copyright 2024 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import java.util.Locale;
+import javax.swing.JComponent;
+import javax.swing.JLabel;
+import javax.swing.UIManager;
+import javax.swing.plaf.basic.BasicHTML;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.Document;
+import javax.swing.text.View;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+/**
+ * @author Karl Tauber
+ */
+public class TestFlatHTML
+{
+	private final String body = "some <small>small</small> text";
+	private final String bodyInBody = "<body>" + body + "</body>";
+	private final String bodyPlain = "some small text";
+
+	@BeforeAll
+	static void setup() {
+		TestUtils.setup( false );
+		TestUtils.scaleFont( 2 );
+	}
+
+	@AfterAll
+	static void cleanup() {
+		TestUtils.cleanup();
+	}
+
+	@Test
+	void simple() {
+		testHtmlBaseSize( "<html>${BASE_SIZE_IN_HEAD}" + body + "</html>", bodyPlain );
+		testHtmlBaseSize( "<html>${BASE_SIZE_IN_HEAD}" + bodyInBody + "</html>", bodyPlain );
+	}
+
+	@Test
+	void htmlWithHeadTag() {
+		testHtmlBaseSize( "<html><head>${BASE_SIZE}<title>test</title><head>" + body + "</html>", bodyPlain );
+		testHtmlBaseSize( "<html><head>${BASE_SIZE}<title>test</title><head>" + bodyInBody + "</html>", bodyPlain );
+
+		testHtmlBaseSize( "<html><head id=\"abc\">${BASE_SIZE}<title>test</title><head>" + body + "</html>", bodyPlain );
+		testHtmlBaseSize( "<html><head id=\"abc\">${BASE_SIZE}<title>test</title><head>" + bodyInBody + "</html>", bodyPlain );
+	}
+
+	@Test
+	void htmlWithStyleTag() {
+		testHtmlBaseSize( "<html>${BASE_SIZE}<style>body { color: #f00; }</style>" + bodyInBody + "</html>", bodyPlain );
+		testHtmlBaseSize( "<html>${BASE_SIZE}<style>body { color: #f00; }</style><h1>header1</h1>" + body + "</html>", "header1\n" + bodyPlain );
+
+		testHtmlBaseSize( "<html>${BASE_SIZE}<style type='text/css'>body { color: #f00; }</style>" + bodyInBody + "</html>", bodyPlain );
+		testHtmlBaseSize( "<html>${BASE_SIZE}<style type='text/css'>body { color: #f00; }</style><h1>header1</h1>" + body + "</html>", "header1\n" + bodyPlain );
+	}
+
+	@Test
+	void htmlOnComponentWithNullFont() {
+		assertDoesNotThrow( () -> {
+			JLabel label = new JLabel();
+			label.setFont( null );
+			label.setText( "<html>foo<br>bar</html>" );
+		} );
+	}
+
+	private void testHtmlBaseSize( String html, String expectedPlain ) {
+		testHtmlBaseSizeImpl( html, expectedPlain );
+		testHtmlBaseSizeImpl( html.toUpperCase( Locale.ENGLISH ), expectedPlain.toUpperCase( Locale.ENGLISH ) );
+	}
+
+	private void testHtmlBaseSizeImpl( String html, String expectedPlain ) {
+		String baseSize = "<style>BASE_SIZE " + UIManager.getFont( "Label.font" ).getSize() + "</style>";
+		String baseSizeInHead = "<head>" + baseSize + "</head>";
+
+		String expectedHtml = html.replace( "${BASE_SIZE}", baseSize ).replace( "${BASE_SIZE_IN_HEAD}", baseSizeInHead );
+		html = html.replace( "${BASE_SIZE}", "" ).replace( "${BASE_SIZE_IN_HEAD}", "" );
+
+		testHtml( html, expectedHtml, expectedPlain );
+	}
+
+	private void testHtml( String html, String expectedHtml, String expectedPlain ) {
+		FlatHTML.testUpdateRenderer = (c, newHtml) -> {
+			assertEquals( expectedHtml, newHtml );
+			assertEquals( expectedPlain, getPlainText( c ) );
+		};
+		new JLabel( html );
+		FlatHTML.testUpdateRenderer = null;
+	}
+
+	private String getPlainText( JComponent c ) {
+		View view = (View) c.getClientProperty( BasicHTML.propertyKey );
+		if( view == null )
+			return null;
+
+		Document doc = view.getDocument();
+		try {
+			return doc.getText( 0, doc.getLength() ).trim();
+		} catch( BadLocationException ex ) {
+			ex.printStackTrace();
+			return null;
+		}
+	}
+}

flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyleableInfo.java

@@ -253,7 +253,8 @@ public class TestFlatStyleableInfo
 		FlatLabelUI ui = (FlatLabelUI) c.getUI();
 
 		Map<String, Class<?>> expected = expectedMap(
-			"disabledForeground", Color.class
+			"disabledForeground", Color.class,
+			"arc", int.class
 		);
 
 		assertMapEquals( expected, ui.getStyleableInfos( c ) );
@@ -269,6 +270,7 @@ public class TestFlatStyleableInfo
 			"selectionForeground", Color.class,
 			"selectionInactiveBackground", Color.class,
 			"selectionInactiveForeground", Color.class,
+			"alternateRowColor", Color.class,
 			"selectionInsets", Insets.class,
 			"selectionArc", int.class,
 
@@ -516,6 +518,8 @@ public class TestFlatStyleableInfo
 			"icon.borderWidth", float.class,
 			"icon.selectedBorderWidth", float.class,
 			"icon.disabledSelectedBorderWidth", float.class,
+			"icon.indeterminateBorderWidth", float.class,
+			"icon.disabledIndeterminateBorderWidth", float.class,
 			"icon.arc", int.class,
 
 			// enabled
@@ -524,6 +528,9 @@ public class TestFlatStyleableInfo
 			"icon.selectedBorderColor", Color.class,
 			"icon.selectedBackground", Color.class,
 			"icon.checkmarkColor", Color.class,
+			"icon.indeterminateBorderColor", Color.class,
+			"icon.indeterminateBackground", Color.class,
+			"icon.indeterminateCheckmarkColor", Color.class,
 
 			// disabled
 			"icon.disabledBorderColor", Color.class,
@@ -531,6 +538,9 @@ public class TestFlatStyleableInfo
 			"icon.disabledSelectedBorderColor", Color.class,
 			"icon.disabledSelectedBackground", Color.class,
 			"icon.disabledCheckmarkColor", Color.class,
+			"icon.disabledIndeterminateBorderColor", Color.class,
+			"icon.disabledIndeterminateBackground", Color.class,
+			"icon.disabledIndeterminateCheckmarkColor", Color.class,
 
 			// focused
 			"icon.focusedBorderColor", Color.class,
@@ -538,6 +548,9 @@ public class TestFlatStyleableInfo
 			"icon.focusedSelectedBorderColor", Color.class,
 			"icon.focusedSelectedBackground", Color.class,
 			"icon.focusedCheckmarkColor", Color.class,
+			"icon.focusedIndeterminateBorderColor", Color.class,
+			"icon.focusedIndeterminateBackground", Color.class,
+			"icon.focusedIndeterminateCheckmarkColor", Color.class,
 
 			// hover
 			"icon.hoverBorderColor", Color.class,
@@ -545,13 +558,19 @@ public class TestFlatStyleableInfo
 			"icon.hoverSelectedBorderColor", Color.class,
 			"icon.hoverSelectedBackground", Color.class,
 			"icon.hoverCheckmarkColor", Color.class,
+			"icon.hoverIndeterminateBorderColor", Color.class,
+			"icon.hoverIndeterminateBackground", Color.class,
+			"icon.hoverIndeterminateCheckmarkColor", Color.class,
 
 			// pressed
 			"icon.pressedBorderColor", Color.class,
 			"icon.pressedBackground", Color.class,
 			"icon.pressedSelectedBorderColor", Color.class,
 			"icon.pressedSelectedBackground", Color.class,
-			"icon.pressedCheckmarkColor", Color.class
+			"icon.pressedCheckmarkColor", Color.class,
+			"icon.pressedIndeterminateBorderColor", Color.class,
+			"icon.pressedIndeterminateBackground", Color.class,
+			"icon.pressedIndeterminateCheckmarkColor", Color.class
 		);
 	}
 
@@ -799,6 +818,8 @@ public class TestFlatStyleableInfo
 			"selectionForeground", Color.class,
 			"selectionInactiveBackground", Color.class,
 			"selectionInactiveForeground", Color.class,
+			"selectionInsets", Insets.class,
+			"selectionArc", int.class,
 
 			// FlatTableCellBorder
 			"cellMargins", Insets.class,
@@ -962,9 +983,11 @@ public class TestFlatStyleableInfo
 			"selectionInactiveBackground", Color.class,
 			"selectionInactiveForeground", Color.class,
 			"selectionBorderColor", Color.class,
+			"alternateRowColor", Color.class,
 			"selectionInsets", Insets.class,
 			"selectionArc", int.class,
 			"wideSelection", boolean.class,
+			"wideCellRenderer", boolean.class,
 			"showCellFocusIndicator", boolean.class,
 
 			"paintSelection", boolean.class,
@@ -993,12 +1016,20 @@ public class TestFlatStyleableInfo
 			"disabledBorderColor", Color.class,
 			"focusedBorderColor", Color.class,
 			"hoverBorderColor", Color.class,
+			"pressedBorderColor", Color.class,
+
+			"selectedBorderColor", Color.class,
+			"disabledSelectedBorderColor", Color.class,
+			"focusedSelectedBorderColor", Color.class,
+			"hoverSelectedBorderColor", Color.class,
+			"pressedSelectedBorderColor", Color.class,
 
 			"default.borderWidth", float.class,
 			"default.borderColor", Color.class,
 			"default.focusedBorderColor", Color.class,
 			"default.focusColor", Color.class,
 			"default.hoverBorderColor", Color.class,
+			"default.pressedBorderColor", Color.class,
 
 			"toolbar.focusWidth", float.class,
 			"toolbar.focusColor", Color.class,
@@ -1049,6 +1080,8 @@ public class TestFlatStyleableInfo
 			"error.focusedBorderColor", Color.class,
 			"warning.borderColor", Color.class,
 			"warning.focusedBorderColor", Color.class,
+			"success.borderColor", Color.class,
+			"success.focusedBorderColor", Color.class,
 			"custom.borderColor", Color.class,
 
 			"outline", String.class,
@@ -1133,6 +1166,8 @@ public class TestFlatStyleableInfo
 			"borderWidth", float.class,
 			"selectedBorderWidth", float.class,
 			"disabledSelectedBorderWidth", float.class,
+			"indeterminateBorderWidth", float.class,
+			"disabledIndeterminateBorderWidth", float.class,
 			"arc", int.class,
 
 			// enabled
@@ -1141,6 +1176,9 @@ public class TestFlatStyleableInfo
 			"selectedBorderColor", Color.class,
 			"selectedBackground", Color.class,
 			"checkmarkColor", Color.class,
+			"indeterminateBorderColor", Color.class,
+			"indeterminateBackground", Color.class,
+			"indeterminateCheckmarkColor", Color.class,
 
 			// disabled
 			"disabledBorderColor", Color.class,
@@ -1148,6 +1186,9 @@ public class TestFlatStyleableInfo
 			"disabledSelectedBorderColor", Color.class,
 			"disabledSelectedBackground", Color.class,
 			"disabledCheckmarkColor", Color.class,
+			"disabledIndeterminateBorderColor", Color.class,
+			"disabledIndeterminateBackground", Color.class,
+			"disabledIndeterminateCheckmarkColor", Color.class,
 
 			// focused
 			"focusedBorderColor", Color.class,
@@ -1155,6 +1196,9 @@ public class TestFlatStyleableInfo
 			"focusedSelectedBorderColor", Color.class,
 			"focusedSelectedBackground", Color.class,
 			"focusedCheckmarkColor", Color.class,
+			"focusedIndeterminateBorderColor", Color.class,
+			"focusedIndeterminateBackground", Color.class,
+			"focusedIndeterminateCheckmarkColor", Color.class,
 
 			// hover
 			"hoverBorderColor", Color.class,
@@ -1162,13 +1206,19 @@ public class TestFlatStyleableInfo
 			"hoverSelectedBorderColor", Color.class,
 			"hoverSelectedBackground", Color.class,
 			"hoverCheckmarkColor", Color.class,
+			"hoverIndeterminateBorderColor", Color.class,
+			"hoverIndeterminateBackground", Color.class,
+			"hoverIndeterminateCheckmarkColor", Color.class,
 
 			// pressed
 			"pressedBorderColor", Color.class,
 			"pressedBackground", Color.class,
 			"pressedSelectedBorderColor", Color.class,
 			"pressedSelectedBackground", Color.class,
-			"pressedCheckmarkColor", Color.class
+			"pressedCheckmarkColor", Color.class,
+			"pressedIndeterminateBorderColor", Color.class,
+			"pressedIndeterminateBackground", Color.class,
+			"pressedIndeterminateCheckmarkColor", Color.class
 		);
 	}
 

flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyleableValue.java

@@ -305,6 +305,9 @@ public class TestFlatStyleableValue
 		testColor( c, ui, "buttonPressedArrowColor", 0x123456 );
 
 		testColor( c, ui, "popupBackground", 0x123456 );
+		testInsets( c, ui, "popupInsets", 1,2,3,4 );
+		testInsets( c, ui, "selectionInsets", 1,2,3,4 );
+		testInteger( c, ui, "selectionArc", 123 );
 
 		// border
 		flatRoundBorder( c, ui );
@@ -355,6 +358,7 @@ public class TestFlatStyleableValue
 		FlatLabelUI ui = (FlatLabelUI) c.getUI();
 
 		testColor( c, ui, "disabledForeground", 0x123456 );
+		testInteger( c, ui, "arc", 123 );
 	}
 
 	@Test
@@ -366,6 +370,9 @@ public class TestFlatStyleableValue
 		testColor( c, ui, "selectionForeground", 0x123456 );
 		testColor( c, ui, "selectionInactiveBackground", 0x123456 );
 		testColor( c, ui, "selectionInactiveForeground", 0x123456 );
+		testColor( c, ui, "alternateRowColor", 0x123456 );
+		testInsets( c, ui, "selectionInsets", 1,2,3,4 );
+		testInteger( c, ui, "selectionArc", 123 );
 
 		// FlatListCellBorder
 		testInsets( c, ui, "cellMargins", 1,2,3,4 );
@@ -801,6 +808,8 @@ public class TestFlatStyleableValue
 		testColor( c, ui, "selectionForeground", 0x123456 );
 		testColor( c, ui, "selectionInactiveBackground", 0x123456 );
 		testColor( c, ui, "selectionInactiveForeground", 0x901324 );
+		testInsets( c, ui, "selectionInsets", 1,2,3,4 );
+		testInteger( c, ui, "selectionArc", 123 );
 
 		// FlatTableCellBorder
 		testInsets( c, ui, "cellMargins", 1,2,3,4 );
@@ -930,7 +939,11 @@ public class TestFlatStyleableValue
 		testColor( c, ui, "selectionInactiveBackground", 0x123456 );
 		testColor( c, ui, "selectionInactiveForeground", 0x123456 );
 		testColor( c, ui, "selectionBorderColor", 0x123456 );
+		testColor( c, ui, "alternateRowColor", 0x123456 );
+		testInsets( c, ui, "selectionInsets", 1,2,3,4 );
+		testInteger( c, ui, "selectionArc", 123 );
 		testBoolean( c, ui, "wideSelection", true );
+		testBoolean( c, ui, "wideCellRenderer", true );
 		testBoolean( c, ui, "showCellFocusIndicator", true );
 
 		testBoolean( c, ui, "paintSelection", false );
@@ -955,12 +968,20 @@ public class TestFlatStyleableValue
 		testColor( c, ui, "disabledBorderColor", 0x123456 );
 		testColor( c, ui, "focusedBorderColor", 0x123456 );
 		testColor( c, ui, "hoverBorderColor", 0x123456 );
+		testColor( c, ui, "pressedBorderColor", 0x123456 );
+
+		testColor( c, ui, "selectedBorderColor", 0x123456 );
+		testColor( c, ui, "disabledSelectedBorderColor", 0x123456 );
+		testColor( c, ui, "focusedSelectedBorderColor", 0x123456 );
+		testColor( c, ui, "hoverSelectedBorderColor", 0x123456 );
+		testColor( c, ui, "pressedSelectedBorderColor", 0x123456 );
 
 		testFloat( c, ui, "default.borderWidth", 1.23f );
 		testColor( c, ui, "default.borderColor", 0x123456 );
 		testColor( c, ui, "default.focusedBorderColor", 0x123456 );
 		testColor( c, ui, "default.focusColor", 0x123456 );
 		testColor( c, ui, "default.hoverBorderColor", 0x123456 );
+		testColor( c, ui, "default.pressedBorderColor", 0x123456 );
 
 		testFloat( c, ui, "toolbar.focusWidth", 1.23f );
 		testColor( c, ui, "toolbar.focusColor", 0x123456 );
@@ -1003,6 +1024,8 @@ public class TestFlatStyleableValue
 		testColor( c, ui, "error.focusedBorderColor", 0x123456 );
 		testColor( c, ui, "warning.borderColor", 0x123456 );
 		testColor( c, ui, "warning.focusedBorderColor", 0x123456 );
+		testColor( c, ui, "success.borderColor", 0x123456 );
+		testColor( c, ui, "success.focusedBorderColor", 0x123456 );
 		testColor( c, ui, "custom.borderColor", 0x123456 );
 
 		testString( c, ui, "outline", "error" );
@@ -1025,12 +1048,20 @@ public class TestFlatStyleableValue
 		testValue( border, "disabledBorderColor", Color.WHITE );
 		testValue( border, "focusedBorderColor", Color.WHITE );
 		testValue( border, "hoverBorderColor", Color.WHITE );
+		testValue( border, "pressedBorderColor", Color.WHITE );
+
+		testValue( border, "selectedBorderColor", Color.WHITE );
+		testValue( border, "disabledSelectedBorderColor", Color.WHITE );
+		testValue( border, "focusedSelectedBorderColor", Color.WHITE );
+		testValue( border, "hoverSelectedBorderColor", Color.WHITE );
+		testValue( border, "pressedSelectedBorderColor", Color.WHITE );
 
 		testValue( border, "default.borderWidth", 2f );
 		testValue( border, "default.borderColor", Color.WHITE );
 		testValue( border, "default.focusedBorderColor", Color.WHITE );
 		testValue( border, "default.focusColor", Color.WHITE );
 		testValue( border, "default.hoverBorderColor", Color.WHITE );
+		testValue( border, "default.pressedBorderColor", Color.WHITE );
 
 		testValue( border, "toolbar.focusWidth", 1.5f );
 		testValue( border, "toolbar.focusColor", Color.WHITE );
@@ -1092,6 +1123,8 @@ public class TestFlatStyleableValue
 		testValue( border, "error.focusedBorderColor", Color.WHITE );
 		testValue( border, "warning.borderColor", Color.WHITE );
 		testValue( border, "warning.focusedBorderColor", Color.WHITE );
+		testValue( border, "success.borderColor", Color.WHITE );
+		testValue( border, "success.focusedBorderColor", Color.WHITE );
 		testValue( border, "custom.borderColor", Color.WHITE );
 	}
 
@@ -1120,6 +1153,8 @@ public class TestFlatStyleableValue
 		testValue( icon, "borderWidth", 1.5f );
 		testValue( icon, "selectedBorderWidth", 1.5f );
 		testValue( icon, "disabledSelectedBorderWidth", 1.5f );
+		testValue( icon, "indeterminateBorderWidth", 1.5f );
+		testValue( icon, "disabledIndeterminateBorderWidth", 1.5f );
 		testValue( icon, "arc", 5 );
 
 		// enabled
@@ -1128,6 +1163,9 @@ public class TestFlatStyleableValue
 		testValue( icon, "selectedBorderColor", Color.WHITE );
 		testValue( icon, "selectedBackground", Color.WHITE );
 		testValue( icon, "checkmarkColor", Color.WHITE );
+		testValue( icon, "indeterminateBorderColor", Color.WHITE );
+		testValue( icon, "indeterminateBackground", Color.WHITE );
+		testValue( icon, "indeterminateCheckmarkColor", Color.WHITE );
 
 		// disabled
 		testValue( icon, "disabledBorderColor", Color.WHITE );
@@ -1135,6 +1173,9 @@ public class TestFlatStyleableValue
 		testValue( icon, "disabledSelectedBorderColor", Color.WHITE );
 		testValue( icon, "disabledSelectedBackground", Color.WHITE );
 		testValue( icon, "disabledCheckmarkColor", Color.WHITE );
+		testValue( icon, "disabledIndeterminateBorderColor", Color.WHITE );
+		testValue( icon, "disabledIndeterminateBackground", Color.WHITE );
+		testValue( icon, "disabledIndeterminateCheckmarkColor", Color.WHITE );
 
 		// focused
 		testValue( icon, "focusedBorderColor", Color.WHITE );
@@ -1142,6 +1183,9 @@ public class TestFlatStyleableValue
 		testValue( icon, "focusedSelectedBorderColor", Color.WHITE );
 		testValue( icon, "focusedSelectedBackground", Color.WHITE );
 		testValue( icon, "focusedCheckmarkColor", Color.WHITE );
+		testValue( icon, "focusedIndeterminateBorderColor", Color.WHITE );
+		testValue( icon, "focusedIndeterminateBackground", Color.WHITE );
+		testValue( icon, "focusedIndeterminateCheckmarkColor", Color.WHITE );
 
 		// hover
 		testValue( icon, "hoverBorderColor", Color.WHITE );
@@ -1149,6 +1193,9 @@ public class TestFlatStyleableValue
 		testValue( icon, "hoverSelectedBorderColor", Color.WHITE );
 		testValue( icon, "hoverSelectedBackground", Color.WHITE );
 		testValue( icon, "hoverCheckmarkColor", Color.WHITE );
+		testValue( icon, "hoverIndeterminateBorderColor", Color.WHITE );
+		testValue( icon, "hoverIndeterminateBackground", Color.WHITE );
+		testValue( icon, "hoverIndeterminateCheckmarkColor", Color.WHITE );
 
 		// pressed
 		testValue( icon, "pressedBorderColor", Color.WHITE );
@@ -1156,6 +1203,9 @@ public class TestFlatStyleableValue
 		testValue( icon, "pressedSelectedBorderColor", Color.WHITE );
 		testValue( icon, "pressedSelectedBackground", Color.WHITE );
 		testValue( icon, "pressedCheckmarkColor", Color.WHITE );
+		testValue( icon, "pressedIndeterminateBorderColor", Color.WHITE );
+		testValue( icon, "pressedIndeterminateBackground", Color.WHITE );
+		testValue( icon, "pressedIndeterminateCheckmarkColor", Color.WHITE );
 	}
 
 	@Test

flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyling.java

@@ -412,6 +412,7 @@ public class TestFlatStyling
 		FlatLabelUI ui = (FlatLabelUI) c.getUI();
 
 		ui.applyStyle( c, "disabledForeground: #fff" );
+		ui.applyStyle( c, "arc: 8" );
 
 		// JComponent properties
 		ui.applyStyle( c, "background: #fff" );
@@ -432,6 +433,7 @@ public class TestFlatStyling
 		ui.applyStyle( "selectionForeground: #fff" );
 		ui.applyStyle( "selectionInactiveBackground: #fff" );
 		ui.applyStyle( "selectionInactiveForeground: #fff" );
+		ui.applyStyle( "alternateRowColor: #fff" );
 		ui.applyStyle( "selectionInsets: 1,2,3,4" );
 		ui.applyStyle( "selectionArc: 8" );
 
@@ -986,6 +988,8 @@ public class TestFlatStyling
 		ui.applyStyle( "selectionForeground: #fff" );
 		ui.applyStyle( "selectionInactiveBackground: #fff" );
 		ui.applyStyle( "selectionInactiveForeground: #fff" );
+		ui.applyStyle( "selectionInsets: 1,2,3,4" );
+		ui.applyStyle( "selectionArc: 8" );
 
 		// FlatTableCellBorder
 		ui.applyStyle( "cellMargins: 1,2,3,4" );
@@ -1184,9 +1188,11 @@ public class TestFlatStyling
 		ui.applyStyle( "selectionInactiveBackground: #fff" );
 		ui.applyStyle( "selectionInactiveForeground: #fff" );
 		ui.applyStyle( "selectionBorderColor: #fff" );
+		ui.applyStyle( "alternateRowColor: #fff" );
 		ui.applyStyle( "selectionInsets: 1,2,3,4" );
 		ui.applyStyle( "selectionArc: 8" );
 		ui.applyStyle( "wideSelection: true" );
+		ui.applyStyle( "wideCellRenderer: true" );
 		ui.applyStyle( "showCellFocusIndicator: true" );
 
 		ui.applyStyle( "paintSelection: false" );
@@ -1272,6 +1278,8 @@ public class TestFlatStyling
 		applyStyle.accept( "error.focusedBorderColor: #fff" );
 		applyStyle.accept( "warning.borderColor: #fff" );
 		applyStyle.accept( "warning.focusedBorderColor: #fff" );
+		applyStyle.accept( "success.borderColor: #fff" );
+		applyStyle.accept( "success.focusedBorderColor: #fff" );
 		applyStyle.accept( "custom.borderColor: desaturate(#f00,50%,relative derived noAutoInverse)" );
 
 		applyStyle.accept( "outline: error" );
@@ -1294,12 +1302,20 @@ public class TestFlatStyling
 		border.applyStyleProperty( "disabledBorderColor", Color.WHITE );
 		border.applyStyleProperty( "focusedBorderColor", Color.WHITE );
 		border.applyStyleProperty( "hoverBorderColor", Color.WHITE );
+		border.applyStyleProperty( "pressedBorderColor", Color.WHITE );
+
+		border.applyStyleProperty( "selectedBorderColor", Color.WHITE );
+		border.applyStyleProperty( "disabledSelectedBorderColor", Color.WHITE );
+		border.applyStyleProperty( "focusedSelectedBorderColor", Color.WHITE );
+		border.applyStyleProperty( "hoverSelectedBorderColor", Color.WHITE );
+		border.applyStyleProperty( "pressedSelectedBorderColor", Color.WHITE );
 
 		border.applyStyleProperty( "default.borderWidth", 2 );
 		border.applyStyleProperty( "default.borderColor", Color.WHITE );
 		border.applyStyleProperty( "default.focusedBorderColor", Color.WHITE );
 		border.applyStyleProperty( "default.focusColor", Color.WHITE );
 		border.applyStyleProperty( "default.hoverBorderColor", Color.WHITE );
+		border.applyStyleProperty( "default.pressedBorderColor", Color.WHITE );
 
 		border.applyStyleProperty( "toolbar.focusWidth", 1.5f );
 		border.applyStyleProperty( "toolbar.focusColor", Color.WHITE );
@@ -1349,6 +1365,8 @@ public class TestFlatStyling
 		border.applyStyleProperty( "error.focusedBorderColor", Color.WHITE );
 		border.applyStyleProperty( "warning.borderColor", Color.WHITE );
 		border.applyStyleProperty( "warning.focusedBorderColor", Color.WHITE );
+		border.applyStyleProperty( "success.borderColor", Color.WHITE );
+		border.applyStyleProperty( "success.focusedBorderColor", Color.WHITE );
 		border.applyStyleProperty( "custom.borderColor", Color.WHITE );
 	}
 
@@ -1377,6 +1395,8 @@ public class TestFlatStyling
 		icon.applyStyleProperty( "borderWidth", 1.5f );
 		icon.applyStyleProperty( "selectedBorderWidth", 1.5f );
 		icon.applyStyleProperty( "disabledSelectedBorderWidth", 1.5f );
+		icon.applyStyleProperty( "indeterminateBorderWidth", 1.5f );
+		icon.applyStyleProperty( "disabledIndeterminateBorderWidth", 1.5f );
 		icon.applyStyleProperty( "arc", 5 );
 
 		// enabled
@@ -1385,6 +1405,9 @@ public class TestFlatStyling
 		icon.applyStyleProperty( "selectedBorderColor", Color.WHITE );
 		icon.applyStyleProperty( "selectedBackground", Color.WHITE );
 		icon.applyStyleProperty( "checkmarkColor", Color.WHITE );
+		icon.applyStyleProperty( "indeterminateBorderColor", Color.WHITE );
+		icon.applyStyleProperty( "indeterminateBackground", Color.WHITE );
+		icon.applyStyleProperty( "indeterminateCheckmarkColor", Color.WHITE );
 
 		// disabled
 		icon.applyStyleProperty( "disabledBorderColor", Color.WHITE );
@@ -1392,6 +1415,9 @@ public class TestFlatStyling
 		icon.applyStyleProperty( "disabledSelectedBorderColor", Color.WHITE );
 		icon.applyStyleProperty( "disabledSelectedBackground", Color.WHITE );
 		icon.applyStyleProperty( "disabledCheckmarkColor", Color.WHITE );
+		icon.applyStyleProperty( "disabledIndeterminateBorderColor", Color.WHITE );
+		icon.applyStyleProperty( "disabledIndeterminateBackground", Color.WHITE );
+		icon.applyStyleProperty( "disabledIndeterminateCheckmarkColor", Color.WHITE );
 
 		// focused
 		icon.applyStyleProperty( "focusedBorderColor", Color.WHITE );
@@ -1399,6 +1425,9 @@ public class TestFlatStyling
 		icon.applyStyleProperty( "focusedSelectedBorderColor", Color.WHITE );
 		icon.applyStyleProperty( "focusedSelectedBackground", Color.WHITE );
 		icon.applyStyleProperty( "focusedCheckmarkColor", Color.WHITE );
+		icon.applyStyleProperty( "focusedIndeterminateBorderColor", Color.WHITE );
+		icon.applyStyleProperty( "focusedIndeterminateBackground", Color.WHITE );
+		icon.applyStyleProperty( "focusedIndeterminateCheckmarkColor", Color.WHITE );
 
 		// hover
 		icon.applyStyleProperty( "hoverBorderColor", Color.WHITE );
@@ -1406,6 +1435,9 @@ public class TestFlatStyling
 		icon.applyStyleProperty( "hoverSelectedBorderColor", Color.WHITE );
 		icon.applyStyleProperty( "hoverSelectedBackground", Color.WHITE );
 		icon.applyStyleProperty( "hoverCheckmarkColor", Color.WHITE );
+		icon.applyStyleProperty( "hoverIndeterminateBorderColor", Color.WHITE );
+		icon.applyStyleProperty( "hoverIndeterminateBackground", Color.WHITE );
+		icon.applyStyleProperty( "hoverIndeterminateCheckmarkColor", Color.WHITE );
 
 		// pressed
 		icon.applyStyleProperty( "pressedBorderColor", Color.WHITE );
@@ -1413,6 +1445,9 @@ public class TestFlatStyling
 		icon.applyStyleProperty( "pressedSelectedBorderColor", Color.WHITE );
 		icon.applyStyleProperty( "pressedSelectedBackground", Color.WHITE );
 		icon.applyStyleProperty( "pressedCheckmarkColor", Color.WHITE );
+		icon.applyStyleProperty( "pressedIndeterminateBorderColor", Color.WHITE );
+		icon.applyStyleProperty( "pressedIndeterminateBackground", Color.WHITE );
+		icon.applyStyleProperty( "pressedIndeterminateCheckmarkColor", Color.WHITE );
 	}
 
 	@Test

flatlaf-demo/.settings/org.eclipse.jdt.core.prefs

@@ -1,4 +1,7 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_assignment_statements_on_columns=false
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false

flatlaf-demo/DemoLaf.properties

@@ -6,7 +6,7 @@
 # when the Demo window is activated.
 
 
-# base theme (light, dark, intellij or darcula)
+# base theme (light, dark, intellij, darcula, maclight or macdark)
 @baseTheme = light
 
 # add you theme defaults here