release 2.5

~~~java
JButton button = new JButton();
int arc = FlatLaf.getStyleableValue( button, "arc" );
Color borderColor = FlatLaf.getStyleableValue( button, "borderColor" );
~~~

.github/workflows/ci.yml

@@ -19,46 +19,32 @@ jobs:
     strategy:
       matrix:
         # test against
-        # - Java 1.8 (minimum requirement)
-        # - Java 9 (first version with JPMS)
+        # - Java 8 (minimum requirement)
         # - Java LTS versions (11, 17, ...)
         # - lastest Java version(s)
         java:
-          - 1.8
-          - 9
+          - 8
           - 11  # LTS
-          - 14
-          - 15
+          - 17  # LTS
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - uses: gradle/wrapper-validation-action@v1
-        if: matrix.java == '1.8'
+        if: matrix.java == '8'
 
       - name: Setup Java ${{ matrix.java }}
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v3
         with:
           java-version: ${{ matrix.java }}
-
-      - name: Cache Gradle wrapper
-        uses: actions/cache@v1
-        with:
-          path: ~/.gradle/wrapper
-          key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties') }}
-
-      - name: Cache Gradle cache
-        uses: actions/cache@v2
-        with:
-          path: ~/.gradle/caches
-          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle.kts') }}
-          restore-keys: ${{ runner.os }}-gradle
+          distribution: adopt  # Java 8 and 11 are pre-installed on ubuntu-latest
+          cache: gradle
 
       - name: Build with Gradle
         run: ./gradlew build
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         if: matrix.java == '11'
         with:
           name: FlatLaf-build-artifacts
@@ -77,25 +63,14 @@ jobs:
       github.repository == 'JFormDesigner/FlatLaf'
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup Java 11
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v3
         with:
           java-version: 11
-
-      - name: Cache Gradle wrapper
-        uses: actions/cache@v1
-        with:
-          path: ~/.gradle/wrapper
-          key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties') }}
-
-      - name: Cache Gradle cache
-        uses: actions/cache@v2
-        with:
-          path: ~/.gradle/caches
-          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle.kts') }}
-          restore-keys: ${{ runner.os }}-gradle
+          distribution: adopt  # pre-installed on ubuntu-latest
+          cache: gradle
 
       - name: Publish snapshot to oss.sonatype.org
         run: ./gradlew publish :flatlaf-theme-editor:build -Dorg.gradle.internal.publish.checksums.insecure=true
@@ -124,25 +99,14 @@ jobs:
       github.repository == 'JFormDesigner/FlatLaf'
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup Java 11
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v3
         with:
           java-version: 11
-
-      - name: Cache Gradle wrapper
-        uses: actions/cache@v1
-        with:
-          path: ~/.gradle/wrapper
-          key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties') }}
-
-      - name: Cache Gradle cache
-        uses: actions/cache@v2
-        with:
-          path: ~/.gradle/caches
-          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle.kts') }}
-          restore-keys: ${{ runner.os }}-gradle
+          distribution: adopt  # pre-installed on ubuntu-latest
+          cache: gradle
 
       - name: Release a new stable version to Maven Central
         run: ./gradlew publish :flatlaf-demo:build :flatlaf-theme-editor:build -Drelease=true

.github/workflows/natives.yml

@@ -9,50 +9,48 @@ on:
         tags:
             - '[0-9]*'
         paths:
-            - 'flatlaf-natives/flatlaf-natives-windows/**'
+            - 'flatlaf-natives/**'
             - '.github/workflows/natives.yml'
+            - 'gradle/wrapper/gradle-wrapper.properties'
     pull_request:
         branches:
             - '*'
         paths:
-            - 'flatlaf-natives/flatlaf-natives-windows/**'
+            - 'flatlaf-natives/**'
             - '.github/workflows/natives.yml'
+            - 'gradle/wrapper/gradle-wrapper.properties'
 
 jobs:
-    Windows:
-        runs-on: windows-latest
+    Natives:
+        strategy:
+            matrix:
+                os:
+                    - windows
+                    - ubuntu
+
+        runs-on: ${{ matrix.os }}-latest
 
         steps:
-            - uses: actions/checkout@v2
+            - uses: actions/checkout@v3
 
             - uses: gradle/wrapper-validation-action@v1
 
-            - name: Setup Java 1.8
-              uses: actions/setup-java@v1
+            - name: Setup Java 11
+              uses: actions/setup-java@v3
               with:
-                  java-version: 1.8
-
-            - name: Cache Gradle wrapper
-              uses: actions/cache@v1
-              with:
-                  path: ~/.gradle/wrapper
-                  key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties') }}
-
-            - name: Cache Gradle cache
-              uses: actions/cache@v2
-              with:
-                  path: |
-                    ~/.gradle/caches
-                    !~/.gradle/caches/modules-2/modules-2.lock
-                  key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle.kts') }}
-                  restore-keys: ${{ runner.os }}-gradle
+                  java-version: 11
+                  distribution: adopt
+                  cache: gradle
 
             - name: Build with Gradle
-              run: ./gradlew :flatlaf-natives-windows:build
+              # --no-daemon is necessary on Windows otherwise caching Gradle would fail with:
+              #   tar.exe: Couldn't open ~/.gradle/caches/modules-2/modules-2.lock: Permission denied
+              run: ./gradlew build-natives --no-daemon
 
             - name: Upload artifacts
-              uses: actions/upload-artifact@v2
+              uses: actions/upload-artifact@v3
               with:
-                  name: FlatLaf-natives-windows-build-artifacts
+                  name: FlatLaf-natives-build-artifacts-${{ matrix.os }}
                   path: |
-                      flatlaf-natives/flatlaf-natives-windows/build
+                      flatlaf-core/src/main/resources/com/formdev/flatlaf/natives
+                      flatlaf-natives/flatlaf-natives-*/build

CHANGELOG.md

@@ -1,6 +1,224 @@
 FlatLaf Change Log
 ==================
 
+## 2.5
+
+#### New features and improvements
+
+- Linux: Use X11 window manager events to move window and to show window menu
+  (right-click on window title bar), if custom window decorations are enabled.
+  This gives FlatLaf windows a more "native" feeling. (issue #482)
+- MenuBar: Support different menu selection style UI defaults for `MenuBar` and
+  `MenuItem`. (issue #587)
+- MenuBar: Top level menus now use `MenuBar.font` instead of `Menu.font`. (issue
+  #589)
+- PasswordField: Reveal button is now hidden (and turned off) if password field
+  is disabled. (issue #501)
+- TabbedPane: New option to disable tab run rotation in wrap layout. Set UI
+  value `TabbedPane.rotateTabRuns` to `false`. (issue #574)
+- Window decorations:
+  - Added client property to mark components in embedded menu bar as "caption"
+    (allow moving window). (issue #569)
+  - Option to show window icon only in frames, but not in dialogs. Set UI value
+    `TitlePane.showIconInDialogs` to `false`. (issue #589)
+  - Added UI value `TitlePane.font` to customize window title font. (issue #589)
+- Added system property `flatlaf.updateUIOnSystemFontChange` to allow disabling
+  automatic UI update when system font changes. (issue #580)
+
+#### Fixed bugs
+
+- Fixed missing UI value `MenuItem.acceleratorDelimiter` on macOS. (was `null`,
+  is now an empty string)
+- Fixed possible exception in `FlatUIUtils.resetRenderingHints()`. (issue #575)
+- Fixed AWT components on macOS, which use Swing components internally. (issue
+  #583)
+- SwingX: Fixed missing highlighting of "today" in `JXMonthView` and
+  `JXDatePicker`.
+
+
+## 2.4
+
+#### New features and improvements
+
+- Native window decorations (Windows 10/11 only):
+  - There is now a small area at top of the embedded menu bar to resize the
+    window.
+  - Improved window title bar layout for small window widths:
+    - Width of iconify/maximize/close buttons is reduced (if necessary) to give
+      more space to embedded menu bar and title.
+    - Window title now has a minimum width to always allow moving window
+      (click-and-drag on window title). Instead, embedded menu bar is made
+      smaller.
+    - Option to show window icon beside window title, if menu bar is embedded or
+      title is centered. Set UI value `TitlePane.showIconBesideTitle` to `true`.
+  - No longer reduce height of window title bar if it has an embedded menu bar
+    and is maximized.
+
+#### Fixed bugs
+
+- ComboBox: Fixed vertical alignment of text in popup list with text in combo
+  box in IntelliJ/Darcula themes.
+- Menus: Fixed application freeze under very special conditions (invoking
+  `FlatLaf.initialize()` twice in NetBeans GUI builder) and using menu that has
+  submenus. See
+  [NetBeans issue #4231](https://github.com/apache/netbeans/issues/4231#issuecomment-1179611682)
+  for details.
+- MenuItem: Fixed sometimes wrapped HTML text on HiDPI screens on Windows.
+- TableHeader: Fixed exception when changing table structure (e.g. removing
+  column) from a table header popup menu action. (issue #532)
+- `HiDPIUtils.paintAtScale1x()` now supports rotated graphics. (issue #557)
+- Typography: No longer use `Consolas` or `Courier New` as monospaced font on
+  Windows because they have bad vertically placement.
+- Native window decorations (Windows 10/11 only):
+  - Do not center window title if embedded menu bar is empty or has no menus at
+    left side, but some components at right side. (issue #558)
+  - Do not use window decorations if system property `sun.java2d.opengl` is
+    `true` on Windows 10. (issue #540)
+  - Fixed missing top window border in dark themes if window drop shadows are
+    disabled in system settings. (issue #554; Windows 10 only)
+  - Right-to-left component orientation of title bar was lost when switching
+    theme.
+
+
+## 2.3
+
+#### New features and improvements
+
+- FileChooser: Added (optional) shortcuts panel. On Windows it contains "Recent
+  Items", "Desktop", "Documents", "This PC" and "Network". On macOS and Linux it
+  is empty/hidden. (issue #100)
+- Button and ToggleButton: Added missing foreground colors for hover, pressed,
+  focused and selected states. (issue #535)
+- Table: Optionally paint alternating rows below table if table is smaller than
+  scroll pane. Set UI value `Table.paintOutsideAlternateRows` to `true`.
+  Requires that `Table.alternateRowColor` is set to a color. (issue #504)
+- ToggleButton: Made the underline placement of tab-style toggle buttons
+  configurable. (PR #530; issue #529)
+- Added spanish translation. (PR #525)
+
+#### Fixed bugs
+
+- IntelliJ Themes: Fixed `TitledBorder` text color in "Monokai Pro" theme.
+  (issue #524)
+
+
+## 2.2
+
+#### New features and improvements
+
+- SplitPane: Allow limiting one-touch expanding to a single side (set client
+  property `JSplitPane.expandableSide` to `"left"` or `"right"`). (issue #355)
+- TabbedPane: Selected tab underline color now changes depending on whether the
+  focus is within the tab content. (issue #398)
+- IntelliJ Themes:
+  - Added "Monokai Pro" and "Xcode-Dark" themes.
+  - TabbedPane now use different background color for selected tabs in all "Arc"
+    themes, in "Hiberbee Dark" and in all "Material UI Lite" themes.
+
+#### Fixed bugs
+
+- Native window decorations (Windows 10/11 only): Fixed wrong window title
+  character encoding used in Windows taskbar. (issue #502)
+- Button: Fixed icon layout and preferred width of default buttons that use bold
+  font. (issue #506)
+- FileChooser: Enabled full row selection for details view to fix alternate row
+  coloring. (issue #512)
+- SplitPane: Fixed `StackOverflowError` caused by layout loop that may occur
+  under special circumstances. (issue #513)
+- Table: Slightly changed grid colors to make grid better recognizable. (issue
+  #514)
+- ToolBar: Fixed endless loop in focus navigation that may occur under special
+  circumstances. (issue #505)
+- IntelliJ Themes: `Component.accentColor` UI property now has useful theme
+  specific values. (issue #507)
+
+
+## 2.1
+
+#### New features and improvements
+
+- Menus: Improved usability of submenus. (PR #490; issue #247)
+- Menus: Scroll large menus using mouse wheel or up/down arrows. (issue #225)
+- Linux: Support using custom window decorations. Enable with
+  `JFrame.setDefaultLookAndFeelDecorated(true)` and
+  `JDialog.setDefaultLookAndFeelDecorated(true)` before creating a window.
+  (issue #482)
+- ScrollBar: Added UI value `ScrollBar.minimumButtonSize` to specify minimum
+  scroll arrow button size (if shown). (issue #493)
+
+#### Fixed bugs
+
+- PasswordField: Fixed reveal button appearance in IntelliJ themes. (issue #494)
+- ScrollBar: Center and scale arrows in scroll up/down buttons (if shown).
+  (issue #493)
+- TextArea, TextPane and EditorPane: No longer select all text when component is
+  focused for the first time. (issue #498; regression in FlatLaf 2.0)
+- TabbedPane: Disable all items in "Show Hidden Tabs" popup menu if tabbed pane
+  is disabled.
+
+#### Incompatibilities
+
+- Method `FlatUIUtils.paintArrow()` (and class `FlatArrowButton`) now paints
+  arrows one pixel smaller than before. To fix this, increase parameter
+  `arrowSize` by one.
+
+
+## 2.0.2
+
+- Native window decorations (Windows 10/11 only): Fixed rendering artifacts on
+  HiDPI screens when dragging window partly offscreen and back into screen
+  bounds. (issue #477)
+- Repaint component when setting client property `JComponent.outline` (issue
+  #480).
+- macOS: Fixed NPE when using some icons in main menu items. (issue #483)
+
+
+## 2.0.1
+
+- Fixed memory leak in Panel, Separator and ToolBarSeparator. (issue #471;
+  regression in FlatLaf 2.0)
+- ToolTip: Fixed wrong tooltip location if component overrides
+  `JComponent.getToolTipLocation()` and wants place tooltip under mouse
+  location. (issue #468)
+- Extras: Added copy constructor to `FlatSVGIcon`. (issue #465)
+- Moved `module-info.class` from `META-INF\versions\9\` to root folder of JARs.
+  (issue #466)
+
+
+## 2.0
+
+- Added system property `flatlaf.nativeLibraryPath` to load native libraries
+  from a directory. (PR #453)
+- Fixed "endless recursion in font" exception in
+  `FlatLaf$ActiveFont.createValue()` if `UIManager.getFont()` is invoked from
+  multiple threads. (issue #456)
+- PasswordField: Preserve reveal button state when switching theme. (PR #442;
+  issue #173)
+- PasswordField: Reveal button did not show password if
+  `JPasswordField.setEchoChar()` was invoked from application. (PR #442; issue
+  #173)
+- Slider: Fixed/improved focused indicator color when changing accent color. (PR
+  #375)
+- TextField:
+  - Improved hover/pressed/selected colors of leading/trailing buttons (e.g.
+    "reveal" button in password field). (issue #452)
+  - Clear button no longer paints over round border. (issue #451)
+- Extras: Fixed concurrent loading of SVG icons on multiple threads. (issue
+  #459)
+- Use FlatLaf native window decorations by default when running in
+  [JetBrains Runtime](https://github.com/JetBrains/JetBrainsRuntime/wiki)
+  (instead of using JetBrains custom decorations). System variable
+  `flatlaf.useJetBrainsCustomDecorations` is now `false` by default (was `true`
+  in FlatLaf 1.x). (issue #454)
+- Native window decorations:
+  - Fixed blurry iconify/maximize/close button hover rectangles at 125%, 150% or
+    175% scaling. (issue #431)
+  - Updated maximize and restore icons for Windows 11 style. (requires Java
+    8u321, 11.0.14, 17.0.2 or 18+)
+  - Updated hover and pressed colors of iconify/maximize/close buttons for
+    Windows 11 style.
+
+
 ## 2.0-rc1
 
 #### New features and improvements
@@ -24,7 +242,7 @@ FlatLaf Change Log
   - Possibility to hide window title bar icon (for single window set client
     property `JRootPane.titleBarShowIcon` to `false`; for all windows set UI
     value `TitlePane.showIcon` to `false`).
-  - OptionPane: Hide window title bar icon by default. Can be be made visibly by
+  - OptionPane: Hide window title bar icon by default. Can be made visibly by
     setting UI default `OptionPane.showIcon` to `true`. (issue #416)
   - No longer show the Java "duke/cup" icon if no window icon image is set.
     (issue #416)

README.md

@@ -11,9 +11,9 @@ scales on **HiDPI** displays and runs on Java 8 or newer.
 The look is heavily inspired by **Darcula** and **IntelliJ** themes from
 IntelliJ IDEA 2019.2+ and uses almost the same colors and icons.
 
-![Flat Light](images/flat_light.png)
+![FlatLaf Light](images/flat_light.png)
 
-![Flat Dark](images/flat_dark.png)
+![FlatLaf Dark](images/flat_dark.png)
 
 
 IntelliJ Platform Themes
@@ -99,10 +99,22 @@ For more information and documentation visit
 - [Customizing](https://www.formdev.com/flatlaf/customizing/)
 - [How to Customize](https://www.formdev.com/flatlaf/how-to-customize/)
 - [Properties Files](https://www.formdev.com/flatlaf/properties-files/)
+- [Components UI Properties](https://www.formdev.com/flatlaf/components/)
+- [Typography](https://www.formdev.com/flatlaf/typography/)
 - [Client Properties](https://www.formdev.com/flatlaf/client-properties/)
 - [System Properties](https://www.formdev.com/flatlaf/system-properties/)
 
 
+Theme Editor
+------------
+
+The Theme Editor that supports editing FlatLaf theme properties files. See
+[Theme Editor documentation](https://www.formdev.com/flatlaf/theme-editor/) for
+details and downloads.
+
+![Theme Editor](images/theme-editor@1.5x.png)
+
+
 Buzz
 ----
 
@@ -114,6 +126,11 @@ Buzz
 Applications using FlatLaf
 --------------------------
 
+- ![New](images/new.svg) [Ultorg](https://www.ultorg.com/) (**commercial**) - a
+  visual query system for relational databases
+- ![New](images/new.svg) [MooInfo](https://github.com/rememberber/MooInfo) -
+  visual implementation of OSHI, to view information about the system and
+  hardware
 - ![New](images/new.svg) [Jailer](https://github.com/Wisser/Jailer) 11.2 -
   database subsetting and relational data browsing tool
 - [Apache NetBeans](https://netbeans.apache.org/) 11.3 - IDE for Java, PHP, HTML
@@ -149,9 +166,10 @@ Applications using FlatLaf
 - [Total Validator](https://www.totalvalidator.com/) 15 (**commercial**) -
   checks your website
 - [j-lawyer](https://github.com/jlawyerorg/j-lawyer-org) - Kanzleisoftware
-- [MegaMek](https://github.com/MegaMek/megamek) v0.47.4 and
-  [MekHQ](https://github.com/MegaMek/mekhq) v0.47.5 - a turn-based sci-fi board
-  game
+- [MegaMek](https://github.com/MegaMek/megamek),
+  [MegaMekLab](https://github.com/MegaMek/megameklab) and
+  [MekHQ](https://github.com/MegaMek/mekhq) v0.47.5+ - a sci-fi tabletop
+  BattleTech simulator suite handling battles, unit building, and campaigns
 - [GUIslice Builder](https://github.com/ImpulseAdventure/GUIslice-Builder)
   0.13.b024 - GUI builder for
   [GUIslice](https://github.com/ImpulseAdventure/GUIslice), a lightweight GUI

build.gradle.kts

@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-val releaseVersion = "2.0-rc1"
-val developmentVersion = "2.0-SNAPSHOT"
+val releaseVersion = "2.5"
+val developmentVersion = "3.0-SNAPSHOT"
 
 version = if( java.lang.Boolean.getBoolean( "release" ) ) releaseVersion else developmentVersion
 

buildSrc/src/main/kotlin/flatlaf-cpp-library.gradle.kts

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2022 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.
+ */
+
+plugins {
+	`cpp-library`
+}
+
+library {
+	// disable debuggable for release builds to make shared libraries smaller
+	binaries.configureEach( CppSharedLibrary::class ) {
+		with( compileTask.get() ) {
+			if( name.contains( "Release" ) )
+				isDebuggable = false
+		}
+		with( linkTask.get() ) {
+			if( name.contains( "Release" ) )
+				debuggable.set( false )
+		}
+	}
+}
+
+tasks {
+	withType<CppCompile>().configureEach {
+		doFirst {
+			println( "Used Tool Chain:" )
+			println( "  - ${toolChain.get()}" )
+			println( "Available Tool Chains:" )
+			toolChains.forEach {
+				println( "  - $it" )
+			}
+		}
+	}
+}

buildSrc/src/main/kotlin/flatlaf-java9.gradle.kts

@@ -28,7 +28,7 @@ if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
 	}
 
 	dependencies {
-		add( "java9Compile", sourceSets.main.get().output )
+		add( "java9Implementation", sourceSets.main.get().output )
 	}
 
 	tasks {

buildSrc/src/main/kotlin/flatlaf-jni-headers.gradle.kts

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2022 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.
+ */
+
+open class JniHeadersExtension {
+	var headers: List<String> = emptyList()
+}
+
+val extension = project.extensions.create<JniHeadersExtension>( "flatlafJniHeaders" )
+
+
+tasks {
+	register<Copy>( "jni-headers" ) {
+		// depend on :flatlaf-core:compileJava because it generates the JNI headers
+		dependsOn( ":flatlaf-core:compileJava" )
+
+		from( project( ":flatlaf-core" ).buildDir.resolve( "generated/jni-headers" ) )
+		into( "src/main/headers" )
+		include( extension.headers )
+		filter<org.apache.tools.ant.filters.FixCrLfFilter>(
+			"eol" to org.apache.tools.ant.filters.FixCrLfFilter.CrLf.newInstance( "lf" )
+		)
+	}
+}

buildSrc/src/main/kotlin/flatlaf-module-info.gradle.kts

@@ -61,12 +61,8 @@ if( JavaVersion.current() >= JavaVersion.VERSION_1_9 ) {
 		}
 
 		jar {
-			manifest.attributes( "Multi-Release" to "true" )
-
-			into( "META-INF/versions/9" ) {
-				from( sourceSets["module-info"].output ) {
-					include( "module-info.class" )
-				}
+			from( sourceSets["module-info"].output ) {
+				include( "module-info.class" )
 			}
 		}
 	}

flatlaf-core/build.gradle.kts

@@ -29,7 +29,7 @@ dependencies {
 	testRuntimeOnly( "org.junit.jupiter:junit-jupiter-engine" )
 
 	// https://github.com/jtulach/netbeans-apitest
-	sigtest( "org.netbeans.tools:sigtest-maven-plugin:1.4" )
+	sigtest( "org.netbeans.tools:sigtest-maven-plugin:1.7" )
 }
 
 java {
@@ -43,11 +43,6 @@ tasks {
 		options.headerOutputDirectory.set( buildDir.resolve( "generated/jni-headers" ) )
 	}
 
-	processResources {
-		// build native libraries
-		dependsOn( ":flatlaf-natives-windows:assemble" )
-	}
-
 	jar {
 		archiveBaseName.set( "flatlaf" )
 
@@ -71,6 +66,9 @@ tasks {
 	test {
 		useJUnitPlatform()
 		testLogging.exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
+
+		if( JavaVersion.current() >= JavaVersion.VERSION_1_9 )
+			jvmArgs( listOf( "--add-opens", "java.desktop/javax.swing.plaf.basic=ALL-UNNAMED" ) )
 	}
 
 	register( "sigtestGenerate" ) {

flatlaf-core/flatlaf-core-sigtest.txt

@@ -1,5 +1,5 @@
 #Signature file v4.1
-#Version 1.6
+#Version 2.4
 
 CLSS public abstract interface com.formdev.flatlaf.FlatClientProperties
 fld public final static java.lang.String BUTTON_TYPE = "JButton.buttonType"
@@ -30,7 +30,12 @@ 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 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"
 fld public final static java.lang.String SQUARE_SIZE = "JButton.squareSize"
+fld public final static java.lang.String STYLE = "FlatLaf.style"
+fld public final static java.lang.String STYLE_CLASS = "FlatLaf.styleClass"
 fld public final static java.lang.String TABBED_PANE_ALIGN_CENTER = "center"
 fld public final static java.lang.String TABBED_PANE_ALIGN_FILL = "fill"
 fld public final static java.lang.String TABBED_PANE_ALIGN_LEADING = "leading"
@@ -59,6 +64,9 @@ fld public final static java.lang.String TABBED_PANE_TAB_CLOSE_TOOLTIPTEXT = "JT
 fld public final static java.lang.String TABBED_PANE_TAB_HEIGHT = "JTabbedPane.tabHeight"
 fld public final static java.lang.String TABBED_PANE_TAB_ICON_PLACEMENT = "JTabbedPane.tabIconPlacement"
 fld public final static java.lang.String TABBED_PANE_TAB_INSETS = "JTabbedPane.tabInsets"
+fld public final static java.lang.String TABBED_PANE_TAB_TYPE = "JTabbedPane.tabType"
+fld public final static java.lang.String TABBED_PANE_TAB_TYPE_CARD = "card"
+fld public final static java.lang.String TABBED_PANE_TAB_TYPE_UNDERLINED = "underlined"
 fld public final static java.lang.String TABBED_PANE_TAB_WIDTH_MODE = "JTabbedPane.tabWidthMode"
 fld public final static java.lang.String TABBED_PANE_TAB_WIDTH_MODE_COMPACT = "compact"
 fld public final static java.lang.String TABBED_PANE_TAB_WIDTH_MODE_EQUAL = "equal"
@@ -67,12 +75,21 @@ fld public final static java.lang.String TABBED_PANE_TRAILING_COMPONENT = "JTabb
 fld public final static java.lang.String TAB_BUTTON_SELECTED_BACKGROUND = "JToggleButton.tab.selectedBackground"
 fld public final static java.lang.String TAB_BUTTON_UNDERLINE_COLOR = "JToggleButton.tab.underlineColor"
 fld public final static java.lang.String TAB_BUTTON_UNDERLINE_HEIGHT = "JToggleButton.tab.underlineHeight"
+fld public final static java.lang.String TAB_BUTTON_UNDERLINE_PLACEMENT = "JToggleButton.tab.underlinePlacement"
+fld public final static java.lang.String TEXT_FIELD_CLEAR_CALLBACK = "JTextField.clearCallback"
+fld public final static java.lang.String TEXT_FIELD_LEADING_COMPONENT = "JTextField.leadingComponent"
+fld public final static java.lang.String TEXT_FIELD_LEADING_ICON = "JTextField.leadingIcon"
 fld public final static java.lang.String TEXT_FIELD_PADDING = "JTextField.padding"
+fld public final static java.lang.String TEXT_FIELD_SHOW_CLEAR_BUTTON = "JTextField.showClearButton"
+fld public final static java.lang.String TEXT_FIELD_TRAILING_COMPONENT = "JTextField.trailingComponent"
+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_SHOW_ICON = "JRootPane.titleBarShowIcon"
 fld public final static java.lang.String TREE_PAINT_SELECTION = "JTree.paintSelection"
 fld public final static java.lang.String TREE_WIDE_SELECTION = "JTree.wideSelection"
 fld public final static java.lang.String USE_WINDOW_DECORATIONS = "JRootPane.useWindowDecorations"
+meth public static <%0 extends java.lang.Object> {%%0} clientProperty(javax.swing.JComponent,java.lang.String,{%%0},java.lang.Class<{%%0}>)
 meth public static boolean clientPropertyBoolean(javax.swing.JComponent,java.lang.String,boolean)
 meth public static boolean clientPropertyEquals(javax.swing.JComponent,java.lang.String,java.lang.Object)
 meth public static int clientPropertyInt(javax.swing.JComponent,java.lang.String,int)
@@ -165,6 +182,7 @@ meth public boolean isSupportedLookAndFeel()
 meth public final boolean equals(java.lang.Object)
 meth public final int hashCode()
 meth public java.lang.String getID()
+meth public java.util.Map<java.lang.String,java.lang.String> getExtraDefaults()
 meth public javax.swing.Icon getDisabledIcon(javax.swing.JComponent,javax.swing.Icon)
 meth public javax.swing.UIDefaults getDefaults()
 meth public static boolean install(javax.swing.LookAndFeel)
@@ -174,6 +192,8 @@ meth public static boolean isShowMnemonics()
 meth public static boolean isUseNativeWindowDecorations()
 meth public static boolean setup(javax.swing.LookAndFeel)
 meth public static boolean supportsNativeWindowDecorations()
+meth public static java.lang.Object parseDefaultsValue(java.lang.String,java.lang.String,java.lang.Class<?>)
+meth public static java.util.Map<java.lang.String,java.lang.String> getGlobalExtraDefaults()
 meth public static javax.swing.UIDefaults$ActiveValue createActiveFontValue(float)
 meth public static void hideMnemonics()
 meth public static void initIconColors(javax.swing.UIDefaults,boolean)
@@ -181,22 +201,26 @@ meth public static void installLafInfo(java.lang.String,java.lang.Class<? extend
 meth public static void registerCustomDefaultsSource(java.io.File)
 meth public static void registerCustomDefaultsSource(java.lang.String)
 meth public static void registerCustomDefaultsSource(java.lang.String,java.lang.ClassLoader)
+meth public static void registerCustomDefaultsSource(java.net.URL)
 meth public static void repaintAllFramesAndDialogs()
 meth public static void revalidateAndRepaintAllFramesAndDialogs()
 meth public static void runWithUIDefaultsGetter(java.util.function.Function<java.lang.Object,java.lang.Object>,java.lang.Runnable)
+meth public static void setGlobalExtraDefaults(java.util.Map<java.lang.String,java.lang.String>)
 meth public static void setUseNativeWindowDecorations(boolean)
 meth public static void showMnemonics(java.awt.Component)
 meth public static void unregisterCustomDefaultsSource(java.io.File)
 meth public static void unregisterCustomDefaultsSource(java.lang.String)
 meth public static void unregisterCustomDefaultsSource(java.lang.String,java.lang.ClassLoader)
+meth public static void unregisterCustomDefaultsSource(java.net.URL)
 meth public static void updateUI()
 meth public static void updateUILater()
 meth public void initialize()
 meth public void registerUIDefaultsGetter(java.util.function.Function<java.lang.Object,java.lang.Object>)
+meth public void setExtraDefaults(java.util.Map<java.lang.String,java.lang.String>)
 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,mnemonicHandler,oldPopupFactory,postInitialization,uiDefaultsGetters,updateUIPending
+hfds DESKTOPFONTHINTS,aquaLoaded,customDefaultsSources,desktopPropertyListener,desktopPropertyName,desktopPropertyName2,extraDefaults,globalExtraDefaults,mnemonicHandler,oldPopupFactory,postInitialization,subMenuUsabilityHelperInstalled,uiDefaultsGetters,updateUIPending
 hcls ActiveFont,FlatUIDefaults,ImageIconUIResource
 
 CLSS public abstract interface static com.formdev.flatlaf.FlatLaf$DisabledIconProvider
@@ -231,6 +255,7 @@ hfds baseTheme,dark,name,properties
 CLSS public abstract interface com.formdev.flatlaf.FlatSystemProperties
 fld public final static java.lang.String ANIMATION = "flatlaf.animation"
 fld public final static java.lang.String MENUBAR_EMBEDDED = "flatlaf.menuBarEmbedded"
+fld public final static java.lang.String NATIVE_LIBRARY_PATH = "flatlaf.nativeLibraryPath"
 fld public final static java.lang.String UI_SCALE = "flatlaf.uiScale"
 fld public final static java.lang.String UI_SCALE_ALLOW_SCALE_DOWN = "flatlaf.uiScale.allowScaleDown"
 fld public final static java.lang.String UI_SCALE_ENABLED = "flatlaf.uiScale.enabled"
@@ -330,7 +355,15 @@ innr public static HSLIncreaseDecrease
 innr public static Mix
 meth public !varargs static java.awt.Color applyFunctions(java.awt.Color,com.formdev.flatlaf.util.ColorFunctions$ColorFunction[])
 meth public static float clamp(float)
+meth public static float luma(java.awt.Color)
+meth public static java.awt.Color darken(java.awt.Color,float)
+meth public static java.awt.Color desaturate(java.awt.Color,float)
+meth public static java.awt.Color lighten(java.awt.Color,float)
 meth public static java.awt.Color mix(java.awt.Color,java.awt.Color,float)
+meth public static java.awt.Color saturate(java.awt.Color,float)
+meth public static java.awt.Color shade(java.awt.Color,float)
+meth public static java.awt.Color spin(java.awt.Color,float)
+meth public static java.awt.Color tint(java.awt.Color,float)
 supr java.lang.Object
 
 CLSS public abstract interface static com.formdev.flatlaf.util.ColorFunctions$ColorFunction
@@ -566,6 +599,7 @@ meth public static java.util.List<java.awt.Image> getResolutionVariants(java.awt
 supr java.lang.Object
 
 CLSS public com.formdev.flatlaf.util.NativeLibrary
+cons public init(java.io.File,boolean)
 cons public init(java.lang.String,java.lang.ClassLoader,boolean)
 meth public boolean isLoaded()
 supr java.lang.Object
@@ -589,23 +623,59 @@ meth public void paintIcon(java.awt.Component,java.awt.Graphics,int,int)
 supr java.lang.Object
 hfds iconHeight,iconWidth,imageIcon,lastImage,lastSystemScaleFactor,lastUserScaleFactor
 
+CLSS public com.formdev.flatlaf.util.SoftCache<%0 extends java.lang.Object, %1 extends java.lang.Object>
+cons public init()
+cons public init(int)
+intf java.util.Map<{com.formdev.flatlaf.util.SoftCache%0},{com.formdev.flatlaf.util.SoftCache%1}>
+meth public boolean containsKey(java.lang.Object)
+meth public boolean containsValue(java.lang.Object)
+meth public boolean isEmpty()
+meth public int size()
+meth public java.util.Collection<{com.formdev.flatlaf.util.SoftCache%1}> values()
+meth public java.util.Set<java.util.Map$Entry<{com.formdev.flatlaf.util.SoftCache%0},{com.formdev.flatlaf.util.SoftCache%1}>> entrySet()
+meth public java.util.Set<{com.formdev.flatlaf.util.SoftCache%0}> keySet()
+meth public void clear()
+meth public void forEach(java.util.function.BiConsumer<? super {com.formdev.flatlaf.util.SoftCache%0},? super {com.formdev.flatlaf.util.SoftCache%1}>)
+meth public void putAll(java.util.Map<? extends {com.formdev.flatlaf.util.SoftCache%0},? extends {com.formdev.flatlaf.util.SoftCache%1}>)
+meth public void replaceAll(java.util.function.BiFunction<? super {com.formdev.flatlaf.util.SoftCache%0},? super {com.formdev.flatlaf.util.SoftCache%1},? extends {com.formdev.flatlaf.util.SoftCache%1}>)
+meth public {com.formdev.flatlaf.util.SoftCache%1} get(java.lang.Object)
+meth public {com.formdev.flatlaf.util.SoftCache%1} put({com.formdev.flatlaf.util.SoftCache%0},{com.formdev.flatlaf.util.SoftCache%1})
+meth public {com.formdev.flatlaf.util.SoftCache%1} remove(java.lang.Object)
+supr java.lang.Object
+hfds map,queue
+hcls CacheReference
+
 CLSS public com.formdev.flatlaf.util.StringUtils
 cons public init()
 meth public static boolean isEmpty(java.lang.String)
+meth public static boolean isTrimmedEmpty(java.lang.String)
 meth public static java.lang.String removeLeading(java.lang.String,java.lang.String)
 meth public static java.lang.String removeTrailing(java.lang.String,java.lang.String)
+meth public static java.lang.String substringTrimmed(java.lang.String,int)
+meth public static java.lang.String substringTrimmed(java.lang.String,int,int)
 meth public static java.util.List<java.lang.String> split(java.lang.String,char)
+meth public static java.util.List<java.lang.String> split(java.lang.String,char,boolean,boolean)
+supr java.lang.Object
+
+CLSS public com.formdev.flatlaf.util.SwingUtils
+cons public init()
+meth public static <%0 extends java.awt.Component> {%%0} getComponentByName(java.awt.Container,java.lang.String)
 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 isJava_11_orLater
+fld public final static boolean isJava_12_orLater
 fld public final static boolean isJava_15_orLater
+fld public final static boolean isJava_17_orLater
+fld public final static boolean isJava_18_orLater
 fld public final static boolean isJava_9_orLater
 fld public final static boolean isJetBrainsJVM
 fld public final static boolean isJetBrainsJVM_11_orLater
 fld public final static boolean isKDE
 fld public final static boolean isLinux
+fld public final static boolean isMacFullWindowContentSupported
 fld public final static boolean isMacOS
 fld public final static boolean isMacOS_10_11_ElCapitan_orLater
 fld public final static boolean isMacOS_10_14_Mojave_orLater
@@ -615,6 +685,8 @@ fld public final static boolean isWebswing
 fld public final static boolean isWinPE
 fld public final static boolean isWindows
 fld public final static boolean isWindows_10_orLater
+fld public final static boolean isWindows_11_orLater
+fld public final static boolean isX86
 fld public final static boolean isX86_64
 fld public final static long javaVersion
 fld public final static long osVersion
@@ -627,6 +699,7 @@ cons public init()
 meth public static boolean isSystemScalingEnabled()
 meth public static double getSystemScaleFactor(java.awt.Graphics2D)
 meth public static double getSystemScaleFactor(java.awt.GraphicsConfiguration)
+meth public static float computeFontScaleFactor(java.awt.Font)
 meth public static float getUserScaleFactor()
 meth public static float scale(float)
 meth public static float unscale(float)
@@ -933,6 +1006,34 @@ CLSS public abstract interface !annotation java.lang.annotation.Target
 intf java.lang.annotation.Annotation
 meth public abstract java.lang.annotation.ElementType[] value()
 
+CLSS public abstract interface java.util.Map<%0 extends java.lang.Object, %1 extends java.lang.Object>
+innr public abstract interface static Entry
+meth public abstract boolean containsKey(java.lang.Object)
+meth public abstract boolean containsValue(java.lang.Object)
+meth public abstract boolean equals(java.lang.Object)
+meth public abstract boolean isEmpty()
+meth public abstract int hashCode()
+meth public abstract int size()
+meth public abstract java.util.Collection<{java.util.Map%1}> values()
+meth public abstract java.util.Set<java.util.Map$Entry<{java.util.Map%0},{java.util.Map%1}>> entrySet()
+meth public abstract java.util.Set<{java.util.Map%0}> keySet()
+meth public abstract void clear()
+meth public abstract void putAll(java.util.Map<? extends {java.util.Map%0},? extends {java.util.Map%1}>)
+meth public abstract {java.util.Map%1} get(java.lang.Object)
+meth public abstract {java.util.Map%1} put({java.util.Map%0},{java.util.Map%1})
+meth public abstract {java.util.Map%1} remove(java.lang.Object)
+meth public boolean remove(java.lang.Object,java.lang.Object)
+meth public boolean replace({java.util.Map%0},{java.util.Map%1},{java.util.Map%1})
+meth public void forEach(java.util.function.BiConsumer<? super {java.util.Map%0},? super {java.util.Map%1}>)
+meth public void replaceAll(java.util.function.BiFunction<? super {java.util.Map%0},? super {java.util.Map%1},? extends {java.util.Map%1}>)
+meth public {java.util.Map%1} compute({java.util.Map%0},java.util.function.BiFunction<? super {java.util.Map%0},? super {java.util.Map%1},? extends {java.util.Map%1}>)
+meth public {java.util.Map%1} computeIfAbsent({java.util.Map%0},java.util.function.Function<? super {java.util.Map%0},? extends {java.util.Map%1}>)
+meth public {java.util.Map%1} computeIfPresent({java.util.Map%0},java.util.function.BiFunction<? super {java.util.Map%0},? super {java.util.Map%1},? extends {java.util.Map%1}>)
+meth public {java.util.Map%1} getOrDefault(java.lang.Object,{java.util.Map%1})
+meth public {java.util.Map%1} merge({java.util.Map%0},{java.util.Map%1},java.util.function.BiFunction<? super {java.util.Map%1},? super {java.util.Map%1},? extends {java.util.Map%1}>)
+meth public {java.util.Map%1} putIfAbsent({java.util.Map%0},{java.util.Map%1})
+meth public {java.util.Map%1} replace({java.util.Map%0},{java.util.Map%1})
+
 CLSS public abstract interface javax.swing.Icon
 meth public abstract int getIconHeight()
 meth public abstract int getIconWidth()

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

@@ -253,6 +253,19 @@ public interface FlatClientProperties
 	 */
 	String COMPONENT_FOCUS_OWNER = "JComponent.focusOwner";
 
+	/**
+	 * Specifies whether a component in an embedded menu bar should behave as caption
+	 * (left-click allows moving window, right-click shows window system menu).
+	 * The component does not receive mouse pressed/released/clicked/dragged events,
+	 * but it gets mouse entered/exited/moved events.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JComponent}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 *
+	 * @since 2.5
+	 */
+	String COMPONENT_TITLE_BAR_CAPTION = "JComponent.titleBarCaption";
+
 	//---- Popup --------------------------------------------------------------
 
 	/**
@@ -391,6 +404,40 @@ public interface FlatClientProperties
 	 */
 	String SCROLL_PANE_SMOOTH_SCROLLING = "JScrollPane.smoothScrolling";
 
+	//---- JSplitPane ---------------------------------------------------------
+
+	/**
+	 * Specifies what side of the spilt pane is allowed to expand
+	 * via one-touch expanding arrow buttons.
+	 * Requires that one-touch expanding is enabled with
+	 * {@link javax.swing.JSplitPane#setOneTouchExpandable(boolean)}.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JSplitPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.String}<br>
+	 * <strong>Allowed Values</strong>
+	 *     {@link #SPLIT_PANE_EXPANDABLE_SIDE_LEFT} or
+	 *     {@link #SPLIT_PANE_EXPANDABLE_SIDE_RIGHT}
+	 *
+	 * @since 2.2
+	 */
+	String SPLIT_PANE_EXPANDABLE_SIDE = "JSplitPane.expandableSide";
+
+	/**
+	 * Allow expanding only left/top side of the split pane.
+	 *
+	 * @see #SPLIT_PANE_EXPANDABLE_SIDE
+	 * @since 2.2
+	 */
+	String SPLIT_PANE_EXPANDABLE_SIDE_LEFT = "left";
+
+	/**
+	 * Allow expanding only right/bottom side of the split pane.
+	 *
+	 * @see #SPLIT_PANE_EXPANDABLE_SIDE
+	 * @since 2.2
+	 */
+	String SPLIT_PANE_EXPANDABLE_SIDE_RIGHT = "right";
+
 	//---- JTabbedPane --------------------------------------------------------
 
 	/**
@@ -874,7 +921,26 @@ public interface FlatClientProperties
 	 * The component should be not opaque because the text field border is painted
 	 * slightly inside the usually visible border in some cases.
 	 * E.g. when focused (in some themes) or when an outline color is specified
-	 * (see {@link #OUTLINE}.
+	 * (see {@link #OUTLINE}).
+	 * <p>
+	 * The component is prepared in the following way:
+	 * <ul>
+	 * <li>Component client property {@link #STYLE_CLASS} is set to {@code inTextField}.
+	 * <li>If component is a button or toggle button, client property {@link #BUTTON_TYPE}
+	 *     is set to {@link #BUTTON_TYPE_TOOLBAR_BUTTON}
+	 *     and button cursor is set to default cursor (if not set).
+	 * <li>If component is a toolbar, client property {@link #STYLE_CLASS}
+	 *     is set to {@code inTextField} on all toolbar children
+	 *     and toolbar cursor is set to default cursor (if not set).
+	 * </ul>
+	 * Because text fields use the text cursor by default and the cursor is inherited by child components,
+	 * it may be necessary to explicitly set component cursor if you e.g. need the default arrow cursor.
+	 * E.g. {@code comp.setCursor( Cursor.getDefaultCursor() )}.
+	 * <p>
+	 * Styling is used to modify insets/margins and appearance of buttons and toolbars
+	 * so that they fit nicely into the text field and do not increase text field height.
+	 * See styles {@code [style]Button.inTextField} and {@code [style]ToolBar.inTextField}
+	 * in {@code Flat[Light|Dark]Laf.properties}.
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JTextField} (and subclasses)<br>
 	 * <strong>Value type</strong> {@link javax.swing.JComponent}
@@ -886,15 +952,7 @@ public interface FlatClientProperties
 	/**
 	 * Specifies a component that will be placed at the trailing edge of the text field.
 	 * <p>
-	 * The component will be positioned inside and aligned to the visible text field border.
-	 * There is no gap between the visible border and the component.
-	 * The laid out component size will be the preferred component width
-	 * and the inner text field height.
-	 * <p>
-	 * The component should be not opaque because the text field border is painted
-	 * slightly inside the usually visible border in some cases.
-	 * E.g. when focused (in some themes) or when an outline color is specified
-	 * (see {@link #OUTLINE}.
+	 * See {@link #TEXT_FIELD_LEADING_COMPONENT} for details.
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JTextField} (and subclasses)<br>
 	 * <strong>Value type</strong> {@link javax.swing.JComponent}
@@ -947,7 +1005,22 @@ public interface FlatClientProperties
 	//---- JToggleButton ------------------------------------------------------
 
 	/**
-	 * Height of underline if toggle button type is {@link #BUTTON_TYPE_TAB}.
+	 * Placement of underline if toggle button type is {@link #BUTTON_TYPE_TAB}
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JToggleButton}<br>
+	 * <strong>Value type</strong> {@link java.lang.Integer}<br>
+	 * <strong>SupportedValues:</strong>
+	 *     {@link SwingConstants#BOTTOM} (default)
+	 *     {@link SwingConstants#TOP},
+	 *     {@link SwingConstants#LEFT} or
+	 *     {@link SwingConstants#RIGHT}
+	 *
+	 * @since 2.3
+	 */
+	String TAB_BUTTON_UNDERLINE_PLACEMENT = "JToggleButton.tab.underlinePlacement";
+
+	/**
+	 * Thickness of underline if toggle button type is {@link #BUTTON_TYPE_TAB}.
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JToggleButton}<br>
 	 * <strong>Value type</strong> {@link java.lang.Integer}

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

@@ -34,6 +34,8 @@ public class FlatDarculaLaf
 	/**
 	 * Sets the application look and feel to this LaF
 	 * using {@link UIManager#setLookAndFeel(javax.swing.LookAndFeel)}.
+	 *
+	 * @since 1.2
 	 */
 	public static boolean setup() {
 		return setup( new FlatDarculaLaf() );

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

@@ -33,6 +33,8 @@ public class FlatDarkLaf
 	/**
 	 * Sets the application look and feel to this LaF
 	 * using {@link UIManager#setLookAndFeel(javax.swing.LookAndFeel)}.
+	 *
+	 * @since 1.2
 	 */
 	public static boolean setup() {
 		return setup( new FlatDarkLaf() );

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

@@ -26,7 +26,7 @@ import javax.swing.UIDefaults;
  * Allows loading of additional .properties files from addon JARs.
  * {@link java.util.ServiceLoader} is used to load extensions of this class from addon JARs.
  * <p>
- * If you extend this class in a addon JAR, you also have to add a text file named
+ * If you extend this class in an addon JAR, you also have to add a text file named
  * {@code META-INF/services/com.formdev.flatlaf.FlatDefaultsAddon}
  * to the addon JAR. The file must contain a single line with the class name.
  * <p>
@@ -61,7 +61,7 @@ public abstract class FlatDefaultsAddon
 
 	/**
 	 * Returns the priority used to sort addon loading.
-	 * The order is only important if you want overwrite UI defaults of other addons.
+	 * The order is only important if you want to overwrite UI defaults of other addons.
 	 * Lower numbers mean higher priority.
 	 * Returns 10000 by default.
 	 */

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

@@ -19,7 +19,7 @@ package com.formdev.flatlaf;
 /**
  * Default color palette for action icons and object icons.
  * <p>
- * The idea is to use only this well defined set of colors in SVG icons and
+ * The idea is to use only this well-defined set of colors in SVG icons, and
  * then they are replaced at runtime to dark variants or to other theme colors.
  * Then a single SVG icon (light variant) can be used for dark themes too.
  * IntelliJ Platform uses this mechanism to allow themes to change IntelliJ Platform icons.
@@ -35,7 +35,7 @@ package com.formdev.flatlaf;
  * <p>
  * You may use these colors also in your application (outside of SVG icons), but do
  * not use the RGB values defined in this enum.<br>
- * Instead use {@code UIManager.getColor( FlatIconColors.ACTIONS_GREY.key )}.
+ * Instead, use {@code UIManager.getColor( FlatIconColors.ACTIONS_GREY.key )}.
  *
  * @author Karl Tauber
  */

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

@@ -596,7 +596,7 @@ class FlatInputMaps
 	//---- class LazyInputMapEx -----------------------------------------------
 
 	/**
-	 * Lazily creates a input map.
+	 * Lazily creates an input map.
 	 * Similar to {@link UIDefaults.LazyInputMap}, but can use multiple bindings arrays.
 	 */
 	private static class LazyInputMapEx

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

@@ -34,6 +34,8 @@ public class FlatIntelliJLaf
 	/**
 	 * Sets the application look and feel to this LaF
 	 * using {@link UIManager#setLookAndFeel(javax.swing.LookAndFeel)}.
+	 *
+	 * @since 1.2
 	 */
 	public static boolean setup() {
 		return setup( new FlatIntelliJLaf() );

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

@@ -30,6 +30,9 @@ import java.awt.image.ImageProducer;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.io.File;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
 import java.lang.reflect.Method;
 import java.net.URL;
 import java.util.ArrayList;
@@ -63,6 +66,7 @@ import javax.swing.UIDefaults.LazyValue;
 import javax.swing.UIManager;
 import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.plaf.ColorUIResource;
+import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.FontUIResource;
 import javax.swing.plaf.IconUIResource;
 import javax.swing.plaf.UIResource;
@@ -73,6 +77,7 @@ import com.formdev.flatlaf.ui.FlatNativeWindowBorder;
 import com.formdev.flatlaf.ui.FlatPopupFactory;
 import com.formdev.flatlaf.ui.FlatRootPaneUI;
 import com.formdev.flatlaf.ui.FlatUIUtils;
+import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.util.GrayFilter;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.MultiResolutionImageSupport;
@@ -103,6 +108,7 @@ public abstract class FlatLaf
 
 	private PopupFactory oldPopupFactory;
 	private MnemonicHandler mnemonicHandler;
+	private boolean subMenuUsabilityHelperInstalled;
 
 	private Consumer<UIDefaults> postInitialization;
 	private List<Function<Object, Object>> uiDefaultsGetters;
@@ -110,6 +116,8 @@ public abstract class FlatLaf
 	/**
 	 * Sets the application look and feel to the given LaF
 	 * using {@link UIManager#setLookAndFeel(javax.swing.LookAndFeel)}.
+	 *
+	 * @since 1.2
 	 */
 	public static boolean setup( LookAndFeel newLookAndFeel ) {
 		try {
@@ -166,18 +174,19 @@ public abstract class FlatLaf
 	 * Returns whether FlatLaf supports custom window decorations.
 	 * This depends on the operating system and on the used Java runtime.
 	 * <p>
-	 * This method returns {@code true} on Windows 10 (see exception below), {@code false} otherwise.
+	 * This method returns {@code true} on Windows 10/11 (see exception below)
+	 * and on Linux, {@code false} otherwise.
 	 * <p>
-	 * Returns also {@code false} on Windows 10 if:
+	 * Returns also {@code false} on Windows 10/11 if:
 	 * <ul>
-	 * <li>FlatLaf native window border support is available (requires Windows 10)</li>
+	 * <li>FlatLaf native window border support is available (requires Windows 10/11)</li>
 	 * <li>running in
 	 * <a href="https://confluence.jetbrains.com/display/JBR/JetBrains+Runtime">JetBrains Runtime 11 (or later)</a>
 	 * (<a href="https://github.com/JetBrains/JetBrainsRuntime">source code on github</a>)
 	 * and JBR supports custom window decorations
 	 * </li>
 	 * </ul>
-	 * In this cases, custom decorations are enabled by the root pane.
+	 * In these cases, custom decorations are enabled by the root pane.
 	 * Usage of {@link JFrame#setDefaultLookAndFeelDecorated(boolean)} or
 	 * {@link JDialog#setDefaultLookAndFeelDecorated(boolean)} is not necessary.
 	 */
@@ -190,7 +199,7 @@ public abstract class FlatLaf
 			FlatNativeWindowBorder.isSupported() )
 		  return false;
 
-		return SystemInfo.isWindows_10_orLater;
+		return SystemInfo.isWindows_10_orLater || SystemInfo.isLinux;
 	}
 
 	@Override
@@ -230,6 +239,15 @@ public abstract class FlatLaf
 
 	@Override
 	public void initialize() {
+		// do not initialize if this is not the current look and feel
+		//    This is only necessary for special Laf usage. E.g. in GUI builders,
+		//    which may use multiple Lafs and may invoke this method directly.
+		//    This avoids that listeners and factories are installed multiple times.
+		//    In case of the NetBeans GUI builder, which does not invoke uninitialize(),
+		//    this also avoids that listeners stay registered in the system.
+		if( UIManager.getLookAndFeel() != this )
+			return;
+
 		if( SystemInfo.isMacOS )
 			initializeAqua();
 
@@ -243,6 +261,9 @@ public abstract class FlatLaf
 		mnemonicHandler = new MnemonicHandler();
 		mnemonicHandler.install();
 
+		// install submenu usability helper
+		subMenuUsabilityHelperInstalled = SubMenuUsabilityHelper.install();
+
 		// 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:
@@ -260,6 +281,9 @@ public abstract class FlatLaf
 		}
 		if( desktopPropertyName != null ) {
 			desktopPropertyListener = e -> {
+				if( !FlatSystemProperties.getBoolean( FlatSystemProperties.UPDATE_UI_ON_SYSTEM_FONT_CHANGE, true ) )
+					return;
+
 				String propertyName = e.getPropertyName();
 				if( desktopPropertyName.equals( propertyName ) || propertyName.equals( desktopPropertyName2 ) )
 					reSetLookAndFeel();
@@ -298,6 +322,10 @@ public abstract class FlatLaf
 
 	@Override
 	public void uninitialize() {
+		// do not uninitialize if this is not the current look and feel
+		if( UIManager.getLookAndFeel() != this )
+			return;
+
 		// remove desktop property listener
 		if( desktopPropertyListener != null ) {
 			Toolkit toolkit = Toolkit.getDefaultToolkit();
@@ -322,6 +350,12 @@ public abstract class FlatLaf
 			mnemonicHandler = null;
 		}
 
+		// uninstall submenu usability helper
+		if( subMenuUsabilityHelperInstalled ) {
+			SubMenuUsabilityHelper.uninstall();
+			subMenuUsabilityHelperInstalled = false;
+		}
+
 		// restore default link color
 		new HTMLEditorKit().getStyleSheet().addRule( "a, address { color: blue; }" );
 		postInitialization = null;
@@ -547,6 +581,7 @@ public abstract class FlatLaf
 
 		// add fonts that are not set in BasicLookAndFeel
 		defaults.put( "RootPane.font", activeFont );
+		defaults.put( "TitlePane.font", activeFont );
 	}
 
 	private void initDefaultFont( UIDefaults defaults ) {
@@ -605,7 +640,7 @@ public abstract class FlatLaf
 			uiFont = ((ActiveFont)defaultFont).derive( baseFont, fontSize -> {
 				return Math.round( fontSize * UIScale.computeFontScaleFactor( baseFont ) );
 			} );
-		};
+		}
 
 		// increase font size if system property "flatlaf.uiScale" is set
 		uiFont = UIScale.applyCustomScaleFactor( uiFont );
@@ -760,7 +795,7 @@ public abstract class FlatLaf
 	 * Invoke this method before setting the look and feel.
 	 * <p>
 	 * If using Java modules, the package must be opened in {@code module-info.java}.
-	 * Otherwise use {@link #registerCustomDefaultsSource(URL)}.
+	 * Otherwise, use {@link #registerCustomDefaultsSource(URL)}.
 	 *
 	 * @param packageName a package name (e.g. "com.myapp.resources")
 	 */
@@ -862,7 +897,7 @@ public abstract class FlatLaf
 	 * E.g. using {@link UIManager#setLookAndFeel(LookAndFeel)} or {@link #setup(LookAndFeel)}.
 	 * <p>
 	 * The global extra defaults are useful for smaller additional defaults that may change.
-	 * E.g. accent color. Otherwise FlatLaf properties files should be used.
+	 * E.g. accent color. Otherwise, FlatLaf properties files should be used.
 	 * See {@link #registerCustomDefaultsSource(String)}.
 	 * <p>
 	 * The keys and values are strings in same format as in FlatLaf properties files.
@@ -894,7 +929,7 @@ public abstract class FlatLaf
 	 * E.g. using {@link UIManager#setLookAndFeel(LookAndFeel)} or {@link #setup(LookAndFeel)}.
 	 * <p>
 	 * The extra defaults are useful for smaller additional defaults that may change.
-	 * E.g. accent color. Otherwise FlatLaf properties files should be used.
+	 * E.g. accent color. Otherwise, FlatLaf properties files should be used.
 	 * See {@link #registerCustomDefaultsSource(String)}.
 	 * <p>
 	 * The keys and values are strings in same format as in FlatLaf properties files.
@@ -951,7 +986,7 @@ public abstract class FlatLaf
 				// re-set current LaF
 				UIManager.setLookAndFeel( lookAndFeel );
 
-				// must fire property change events ourself because old and new LaF are the same
+				// must fire property change events ourselves because old and new LaF are the same
 				PropertyChangeEvent e = new PropertyChangeEvent( UIManager.class, "lookAndFeel", lookAndFeel, lookAndFeel );
 				for( PropertyChangeListener l : UIManager.getPropertyChangeListeners() )
 					l.propertyChange( e );
@@ -995,7 +1030,7 @@ public abstract class FlatLaf
 	/**
 	 * Returns whether native window decorations are supported on current platform.
 	 * <p>
-	 * This requires Windows 10, but may be disabled if running in special environments
+	 * This requires Windows 10/11, but may be disabled if running in special environments
 	 * (JetBrains Projector, Webswing or WinPE) or if loading native library fails.
 	 * If system property {@link FlatSystemProperties#USE_WINDOW_DECORATIONS} is set to
 	 * {@code false}, then this method also returns {@code false}.
@@ -1201,6 +1236,62 @@ public abstract class FlatLaf
 	 */
 	public static final Object NULL_VALUE = new Object();
 
+	/**
+	 * Returns information about styleable values of a component.
+	 * <p>
+	 * This is equivalent to: {@code ((StyleableUI)c.getUI()).getStyleableInfos(c)}
+	 *
+	 * @since 2.5
+	 */
+	public static Map<String, Class<?>> getStyleableInfos( JComponent c ) {
+		StyleableUI ui = getStyleableUI( c );
+		return (ui != null) ? ui.getStyleableInfos( c ) : null;
+	}
+
+	/**
+	 * Returns the (styled) value for the given key from the given component.
+	 * <p>
+	 * This is equivalent to: {@code ((StyleableUI)c.getUI()).getStyleableValue(c, key)}
+	 *
+	 * @since 2.5
+	 */
+	@SuppressWarnings( "unchecked" )
+	public static <T> T getStyleableValue( JComponent c, String key ) {
+		StyleableUI ui = getStyleableUI( c );
+		return (ui != null) ? (T) ui.getStyleableValue( c, key ) : null;
+	}
+
+	private static StyleableUI getStyleableUI( JComponent c ) {
+		if( !getUIMethodInitialized ) {
+			getUIMethodInitialized = true;
+
+			if( SystemInfo.isJava_9_orLater ) {
+				try {
+					// JComponent.getUI() is available since Java 9
+					getUIMethod = MethodHandles.lookup().findVirtual( JComponent.class, "getUI",
+						MethodType.methodType( ComponentUI.class ) );
+				} catch( Exception ex ) {
+					// ignore
+				}
+			}
+		}
+
+		try {
+			Object ui;
+			if( getUIMethod != null )
+				ui = getUIMethod.invoke( c );
+			else
+				ui = c.getClass().getMethod( "getUI" ).invoke( c );
+			return (ui instanceof StyleableUI) ? (StyleableUI) ui : null;
+		} catch( Throwable ex ) {
+			// ignore
+			return null;
+		}
+	}
+
+	private static boolean getUIMethodInitialized;
+	private static MethodHandle getUIMethod;
+
 	//---- class FlatUIDefaults -----------------------------------------------
 
 	private class FlatUIDefaults
@@ -1223,6 +1314,9 @@ public abstract class FlatLaf
 		}
 
 		private Object getValue( Object key ) {
+			// use local variable for getters to avoid potential multi-threading issues
+			List<Function<Object, Object>> uiDefaultsGetters = FlatLaf.this.uiDefaultsGetters;
+
 			if( uiDefaultsGetters == null )
 				return null;
 
@@ -1276,8 +1370,9 @@ public abstract class FlatLaf
 			this.scaleSize = scaleSize;
 		}
 
+		// using synchronized to avoid exception if invoked at the same time on multiple threads
 		@Override
-		public Object createValue( UIDefaults table ) {
+		public synchronized Object createValue( UIDefaults table ) {
 			if( inCreateValue )
 				throw new IllegalStateException( "FlatLaf: endless recursion in font" );
 

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

@@ -33,6 +33,8 @@ public class FlatLightLaf
 	/**
 	 * Sets the application look and feel to this LaF
 	 * using {@link UIManager#setLookAndFeel(javax.swing.LookAndFeel)}.
+	 *
+	 * @since 1.2
 	 */
 	public static boolean setup() {
 		return setup( new FlatLightLaf() );

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

@@ -16,6 +16,7 @@
 
 package com.formdev.flatlaf;
 
+import javax.swing.SwingUtilities;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -34,7 +35,7 @@ public interface FlatSystemProperties
 	 * To replace the Java 9+ system scale factor, use system property "sun.java2d.uiScale",
 	 * which has the same syntax as this one.
 	 * <p>
-	 * Since FlatLaf 1.1.2: Scale factors less then 100% are allowed.
+	 * Since FlatLaf 1.1.2: Scale factors less than 100% are allowed.
 	 * <p>
 	 * <strong>Allowed Values</strong> e.g. {@code 1.5}, {@code 1.5x}, {@code 150%} or {@code 144dpi} (96dpi is 100%)<br>
 	 */
@@ -81,7 +82,7 @@ public interface FlatSystemProperties
 	 * {@link FlatClientProperties#USE_WINDOW_DECORATIONS} and
 	 * UI default {@code TitlePane.useWindowDecorations}.
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Window 10/11)
 	 * <p>
 	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
 	 * <strong>Default</strong> none
@@ -92,16 +93,16 @@ public interface FlatSystemProperties
 	 * Specifies whether JetBrains Runtime custom window decorations should be used
 	 * when creating {@code JFrame} or {@code JDialog}.
 	 * Requires that the application runs in a
-	 * <a href="https://confluence.jetbrains.com/display/JBR/JetBrains+Runtime">JetBrains Runtime</a>
+	 * <a href="https://github.com/JetBrains/JetBrainsRuntime/wiki">JetBrains Runtime</a>
 	 * (based on OpenJDK).
 	 * <p>
 	 * Setting this to {@code false} disables using JetBrains Runtime custom window decorations.
 	 * Then FlatLaf native window decorations are used.
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Window 10/11)
 	 * <p>
 	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
-	 * <strong>Default</strong> {@code true}
+	 * <strong>Default</strong> {@code false} (since v2; was {@code true} in v1)
 	 */
 	String USE_JETBRAINS_CUSTOM_DECORATIONS = "flatlaf.useJetBrainsCustomDecorations";
 
@@ -116,7 +117,7 @@ public interface FlatSystemProperties
 	 * {@link FlatClientProperties#MENU_BAR_EMBEDDED} and
 	 * UI default {@code TitlePane.menuBarEmbedded}.
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Window 10/11)
 	 * <p>
 	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
 	 * <strong>Default</strong> none
@@ -139,6 +140,29 @@ public interface FlatSystemProperties
 	 */
 	String USE_TEXT_Y_CORRECTION = "flatlaf.useTextYCorrection";
 
+	/**
+	 * Specifies whether FlatLaf updates the UI when the system font changes.
+	 * If {@code true}, {@link SwingUtilities#updateComponentTreeUI(java.awt.Component)}
+	 * gets invoked for all windows if the system font has changed.
+	 * This is the similar to when switching to another look and feel (theme).
+	 * Applications that do not work correctly when switching look and feel,
+	 * should disable this option to avoid corrupted UI.
+	 * <p>
+	 * <strong>Allowed Values</strong> {@code false} and {@code true}<br>
+	 * <strong>Default</strong> {@code true}
+	 * @since 2.5
+	 */
+	String UPDATE_UI_ON_SYSTEM_FONT_CHANGE = "flatlaf.updateUIOnSystemFontChange";
+
+	/**
+	 * Specifies a directory in which the native FlatLaf library have been extracted.
+	 * The path can be absolute or relative to current application working directory.
+	 * This can be used to avoid extraction of the native libraries to the temporary directory at runtime.
+	 *
+	 * @since 2
+	 */
+	String NATIVE_LIBRARY_PATH = "flatlaf.nativeLibraryPath";
+
 	/**
 	 * 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

@@ -37,6 +37,7 @@ 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;
 
 /**
  * This class supports loading IntelliJ .theme.json files and using them as a Laf.
@@ -72,6 +73,8 @@ public class IntelliJTheme
 	 *
 	 * The input stream is automatically closed.
 	 * Using a buffered input stream is not necessary.
+	 *
+	 * @since 1.2
 	 */
 	public static boolean setup( InputStream in ) {
 		try {
@@ -162,8 +165,11 @@ public class IntelliJTheme
 		applyCheckBoxColors( defaults );
 
 		// copy values
-		for( Map.Entry<String, String> e : uiKeyCopying.entrySet() )
-			defaults.put( e.getKey(), defaults.get( e.getValue() ) );
+		for( Map.Entry<String, String> e : uiKeyCopying.entrySet() ) {
+			Object value = defaults.get( e.getValue() );
+			if( value != null )
+				defaults.put( e.getKey(), value );
+		}
 
 		// IDEA does not paint button background if disabled, but FlatLaf does
 		Object panelBackground = defaults.get( "Panel.background" );
@@ -175,7 +181,7 @@ public class IntelliJTheme
 		defaults.put( "Button.hoverBorderColor", defaults.get( "Button.focusedBorderColor" ) );
 		defaults.put( "HelpButton.hoverBorderColor", defaults.get( "Button.focusedBorderColor" ) );
 
-		// IDEA uses a SVG icon for the help button, but paints the background with Button.startBackground and Button.endBackground
+		// 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 )
@@ -242,7 +248,19 @@ public class IntelliJTheme
 			defaults.put( "Tree.rowHeight", 22 );
 
 		// apply theme specific UI defaults at the end to allow overwriting
-		defaults.putAll( themeSpecificDefaults );
+		for( Map.Entry<Object, Object> e : themeSpecificDefaults.entrySet() ) {
+			Object key = e.getKey();
+			Object value = e.getValue();
+
+			// append styles to existing styles
+			if( key instanceof String && ((String)key).startsWith( "[style]" ) ) {
+				Object oldValue = defaults.get( key );
+				if( oldValue != null )
+					value = oldValue + "; " + value;
+			}
+
+			defaults.put( key, value );
+		}
 	}
 
 	private Map<Object, Object> removeThemeSpecificDefaults( UIDefaults defaults ) {
@@ -299,8 +317,19 @@ public class IntelliJTheme
 	@SuppressWarnings( "unchecked" )
 	private void apply( String key, Object value, UIDefaults defaults, ArrayList<Object> defaultsKeysCache, Set<String> uiKeys ) {
 		if( value instanceof Map ) {
-			for( Map.Entry<String, Object> e : ((Map<String, Object>)value).entrySet() )
-				apply( key + '.' + e.getKey(), e.getValue(), defaults, defaultsKeysCache, uiKeys );
+			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" ) ) {
+				String osKey = SystemInfo.isWindows ? "os.windows"
+					: SystemInfo.isMacOS ? "os.mac"
+					: SystemInfo.isLinux ? "os.linux" : null;
+				if( osKey != null && map.containsKey( osKey ) )
+					apply( key, map.get( osKey ), defaults, defaultsKeysCache, uiKeys );
+				else if( map.containsKey( "os.default" ) )
+					apply( key, map.get( "os.default" ), defaults, defaultsKeysCache, uiKeys );
+			} else {
+				for( Map.Entry<String, Object> e : map.entrySet() )
+					apply( key + '.' + e.getKey(), e.getValue(), defaults, defaultsKeysCache, uiKeys );
+			}
 		} else {
 			if( "".equals( value ) )
 				return; // ignore empty value
@@ -534,12 +563,12 @@ public class IntelliJTheme
 	}
 
 	/** Rename UI default keys (key --> value). */
-	private static Map<String, String> uiKeyMapping = new HashMap<>();
+	private static final Map<String, String> uiKeyMapping = new HashMap<>();
 	/** Copy UI default keys (value --> key). */
-	private static Map<String, String> uiKeyCopying = new HashMap<>();
-	private static Map<String, String> uiKeyInverseMapping = new HashMap<>();
-	private static Map<String, String> checkboxKeyMapping = new HashMap<>();
-	private static Map<String, String> checkboxDuplicateColors = new HashMap<>();
+	private static final Map<String, String> uiKeyCopying = new HashMap<>();
+	private static final Map<String, String> uiKeyInverseMapping = new HashMap<>();
+	private static final Map<String, String> checkboxKeyMapping = new HashMap<>();
+	private static final Map<String, String> checkboxDuplicateColors = new HashMap<>();
 
 	static {
 		// ComboBox
@@ -600,6 +629,11 @@ public class IntelliJTheme
 		uiKeyCopying.put( "Spinner.buttonSeparatorColor",         "Component.borderColor" );
 		uiKeyCopying.put( "Spinner.buttonDisabledSeparatorColor", "Component.disabledBorderColor" );
 
+		// TabbedPane
+		uiKeyCopying.put( "TabbedPane.selectedBackground",     "DefaultTabs.underlinedTabBackground" );
+		uiKeyCopying.put( "TabbedPane.selectedForeground",     "DefaultTabs.underlinedTabForeground" );
+		uiKeyCopying.put( "TabbedPane.inactiveUnderlineColor", "DefaultTabs.inactiveUnderlineColor" );
+
 		// TitlePane
 		uiKeyCopying.put( "TitlePane.inactiveBackground",     "TitlePane.background" );
 		uiKeyMapping.put( "TitlePane.infoForeground",         "TitlePane.foreground" );

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

@@ -170,7 +170,7 @@ class LinuxFontPolicy
 
 		Object value = Toolkit.getDefaultToolkit().getDesktopProperty( "gnome.Xft/DPI" );
 		if( value instanceof Integer ) {
-			int dpi = ((Integer)value).intValue() / 1024;
+			int dpi = (Integer) value / 1024;
 			if( dpi == -1 )
 				dpi = 96;
 			if( dpi < 50 )
@@ -197,7 +197,7 @@ class LinuxFontPolicy
 	}
 
 	/**
-	 * Gets the default font for KDE for KDE configuration files.
+	 * Gets the default font for KDE from KDE configuration files.
 	 *
 	 * The Swing fonts are not updated when the user changes system font size
 	 * (System Settings > Fonts > Force Font DPI). A application restart is necessary.
@@ -278,7 +278,7 @@ class LinuxFontPolicy
 		// read config file
 		ArrayList<String> lines = new ArrayList<>( 200 );
 		try( BufferedReader reader = new BufferedReader( new FileReader( file ) ) ) {
-			String line = null;
+			String line;
 			while( (line = reader.readLine()) != null )
 				lines.add( line );
 		} catch( IOException ex ) {

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

@@ -0,0 +1,336 @@
+/*
+ * Copyright 2022 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.AWTEvent;
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Container;
+import java.awt.Dimension;
+import java.awt.EventQueue;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.MouseInfo;
+import java.awt.Point;
+import java.awt.PointerInfo;
+import java.awt.Polygon;
+import java.awt.Rectangle;
+import java.awt.Toolkit;
+import java.awt.Window;
+import java.awt.event.MouseEvent;
+import javax.swing.JComponent;
+import javax.swing.JLayeredPane;
+import javax.swing.JMenu;
+import javax.swing.JPopupMenu;
+import javax.swing.MenuElement;
+import javax.swing.MenuSelectionManager;
+import javax.swing.RootPaneContainer;
+import javax.swing.SwingUtilities;
+import javax.swing.Timer;
+import javax.swing.UIManager;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+import com.formdev.flatlaf.ui.FlatUIUtils;
+
+/**
+ * Improves usability of submenus by using a
+ * <a href="https://height.app/blog/guide-to-build-context-menus#safe-triangle">safe triangle</a>
+ * to avoid that the submenu closes while the user moves the mouse to it.
+ *
+ * @author Karl Tauber
+ */
+class SubMenuUsabilityHelper
+	implements ChangeListener
+{
+	private static final String KEY_USE_SAFE_TRIANGLE = "Menu.useSafeTriangle";
+	private static final String KEY_SHOW_SAFE_TRIANGLE = "FlatLaf.debug.menu.showSafeTriangle";
+
+	// Using a static field to ensure that there is only one instance in the system.
+	// Multiple instances would freeze the application.
+	// https://github.com/apache/netbeans/issues/4231#issuecomment-1179616607
+	private static SubMenuUsabilityHelper instance;
+
+	private SubMenuEventQueue subMenuEventQueue;
+	private SafeTrianglePainter safeTrianglePainter;
+	private boolean changePending;
+
+	// mouse location in screen coordinates
+	private int mouseX;
+	private int mouseY;
+
+	// target popup bounds in screen coordinates
+	private int targetX;
+	private int targetTopY;
+	private int targetBottomY;
+
+	private Rectangle invokerBounds;
+
+	static synchronized boolean install() {
+		if( instance != null )
+			return false;
+
+		instance = new SubMenuUsabilityHelper();
+		MenuSelectionManager.defaultManager().addChangeListener( instance );
+		return true;
+	}
+
+	static synchronized void uninstall() {
+		if( instance == null )
+			return;
+
+		MenuSelectionManager.defaultManager().removeChangeListener( instance );
+		instance.uninstallEventQueue();
+		instance = null;
+	}
+
+	@Override
+	public void stateChanged( ChangeEvent e ) {
+		if( !FlatUIUtils.getUIBoolean( KEY_USE_SAFE_TRIANGLE, true ))
+			return;
+
+		// handle menu selection change later, but only once in case of temporary changes
+		// e.g. moving mouse from one menu item to another one, fires two events:
+		//    1. old menu item is removed from menu selection
+		//    2. new menu item is added to menu selection
+		synchronized( this ) {
+			if( changePending )
+				return;
+			changePending = true;
+		}
+
+		EventQueue.invokeLater( () -> {
+			synchronized( this ) {
+				changePending = false;
+			}
+			menuSelectionChanged();
+		} );
+	}
+
+	private void menuSelectionChanged() {
+		MenuElement[] path = MenuSelectionManager.defaultManager().getSelectedPath();
+
+/*debug
+		System.out.println( "--- " + path.length );
+		for( int i = 0; i < path.length; i++ )
+			System.out.println( "   " + i + ": " + path[i].getClass().getName() );
+debug*/
+
+		// find submenu in menu selection
+		int subMenuIndex = findSubMenu( path );
+
+		// uninstall if there is no submenu in selection
+		if( subMenuIndex < 0 || subMenuIndex != path.length - 1 ) {
+			uninstallEventQueue();
+			return;
+		}
+
+		// get current mouse location
+		PointerInfo pointerInfo = MouseInfo.getPointerInfo();
+		Point mouseLocation = (pointerInfo != null) ? pointerInfo.getLocation() : new Point();
+		mouseX = mouseLocation.x;
+		mouseY = mouseLocation.y;
+
+		// check whether popup is showing, which is e.g. not the case if it is empty
+		JPopupMenu popup = (JPopupMenu) path[subMenuIndex];
+		if( !popup.isShowing() ) {
+			uninstallEventQueue();
+			return;
+		}
+
+		// get invoker screen bounds
+		Component invoker = popup.getInvoker();
+		invokerBounds = (invoker != null)
+			? new Rectangle( invoker.getLocationOnScreen(), invoker.getSize() )
+			: null;
+
+		// check whether mouse location is within invoker
+		if( invokerBounds != null && !invokerBounds.contains( mouseX, mouseY ) ) {
+			uninstallEventQueue();
+			return;
+		}
+
+		// compute top/bottom target locations
+		Point popupLocation = popup.getLocationOnScreen();
+		Dimension popupSize = popup.getSize();
+		targetX = (mouseX < popupLocation.x + (popupSize.width / 2))
+			? popupLocation.x
+			: popupLocation.x + popupSize.width;
+		targetTopY = popupLocation.y;
+		targetBottomY = popupLocation.y + popupSize.height;
+
+		// install own event queue to supress mouse events when mouse is moved within safe triangle
+		if( subMenuEventQueue == null )
+			subMenuEventQueue = new SubMenuEventQueue();
+
+		// create safe triangle painter
+		if( safeTrianglePainter == null && UIManager.getBoolean( KEY_SHOW_SAFE_TRIANGLE ) )
+			safeTrianglePainter = new SafeTrianglePainter( popup );
+	}
+
+	private void uninstallEventQueue() {
+		if( subMenuEventQueue != null ) {
+			subMenuEventQueue.uninstall();
+			subMenuEventQueue = null;
+		}
+
+		if( safeTrianglePainter != null ) {
+			safeTrianglePainter.uninstall();
+			safeTrianglePainter = null;
+		}
+	}
+
+	private int findSubMenu( MenuElement[] path ) {
+		for( int i = path.length - 1; i >= 1; i-- ) {
+			if( path[i] instanceof JPopupMenu &&
+				path[i - 1] instanceof JMenu &&
+				!((JMenu)path[i - 1]).isTopLevelMenu() )
+			  return i;
+		}
+		return -1;
+	}
+
+	private Polygon createSafeTriangle() {
+		return new Polygon(
+			new int[] { mouseX, targetX, targetX },
+			new int[] { mouseY, targetTopY, targetBottomY },
+			3 );
+	}
+
+	//---- class SubMenuEventQueue --------------------------------------------
+
+	private class SubMenuEventQueue
+		extends EventQueue
+	{
+		private Timer mouseUpdateTimer;
+		private Timer timeoutTimer;
+
+		private int newMouseX;
+		private int newMouseY;
+		private AWTEvent lastMouseEvent;
+
+		SubMenuEventQueue() {
+			// timer used to slightly delay update of mouse location used for safe triangle
+			mouseUpdateTimer = new Timer( 50, e -> {
+				mouseX = newMouseX;
+				mouseY = newMouseY;
+
+				if( safeTrianglePainter != null )
+					safeTrianglePainter.repaint();
+			} );
+			mouseUpdateTimer.setRepeats( false );
+
+			// timer used to timeout safe triangle when mouse stops moving
+			timeoutTimer = new Timer( 200, e -> {
+				if( invokerBounds != null && !invokerBounds.contains( newMouseX, newMouseY ) ) {
+					// post last mouse event, which selects menu item at mouse location
+					if( lastMouseEvent != null ) {
+						postEvent( lastMouseEvent );
+						lastMouseEvent = null;
+					}
+
+					uninstallEventQueue();
+					return;
+				}
+			} );
+			timeoutTimer.setRepeats( false );
+
+			Toolkit.getDefaultToolkit().getSystemEventQueue().push( this );
+		}
+
+		void uninstall() {
+			mouseUpdateTimer.stop();
+			mouseUpdateTimer = null;
+
+			timeoutTimer.stop();
+			timeoutTimer = null;
+
+			lastMouseEvent = null;
+
+			super.pop();
+		}
+
+		@Override
+		protected void dispatchEvent( AWTEvent e ) {
+			int id = e.getID();
+
+			if( e instanceof MouseEvent &&
+				(id == MouseEvent.MOUSE_MOVED || id == MouseEvent.MOUSE_DRAGGED) )
+			{
+				newMouseX = ((MouseEvent)e).getXOnScreen();
+				newMouseY = ((MouseEvent)e).getYOnScreen();
+
+				if( safeTrianglePainter != null )
+					safeTrianglePainter.repaint();
+
+				mouseUpdateTimer.stop();
+				timeoutTimer.stop();
+
+				// check whether mouse moved within safe triangle
+				if( createSafeTriangle().contains( newMouseX, newMouseY ) ) {
+					// update mouse location delayed (this changes the safe triangle)
+					mouseUpdateTimer.start();
+
+					timeoutTimer.start();
+
+					// remember last mouse event, which will be posted if the mouse stops moving
+					lastMouseEvent = e;
+
+					// ignore mouse event
+					return;
+				}
+
+				// update mouse location immediately (this changes the safe triangle)
+				mouseX = newMouseX;
+				mouseY = newMouseY;
+			}
+
+			super.dispatchEvent( e );
+		}
+	}
+
+	//---- class SafeTrianglePainter ------------------------------------------
+
+	private class SafeTrianglePainter
+		extends JComponent
+	{
+		SafeTrianglePainter( JPopupMenu popup ) {
+			Window window = SwingUtilities.windowForComponent( popup.getInvoker() );
+			if( window instanceof RootPaneContainer ) {
+				JLayeredPane layeredPane = ((RootPaneContainer)window).getLayeredPane();
+				setSize( layeredPane.getSize() );
+				layeredPane.add( this, Integer.valueOf( JLayeredPane.POPUP_LAYER + 1 ) );
+			}
+		}
+
+		void uninstall() {
+			Container parent = getParent();
+			if( parent != null ) {
+				parent.remove( this );
+				parent.repaint();
+			}
+		}
+
+		@Override
+		protected void paintComponent( Graphics g ) {
+			Point locationOnScreen = getLocationOnScreen();
+			g.translate( -locationOnScreen.x, -locationOnScreen.y );
+
+			g.setColor( Color.red );
+			((Graphics2D)g).draw( createSafeTriangle() );
+		}
+	}
+}

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

@@ -350,7 +350,7 @@ class UIDefaultsLoader
 	enum ValueType { UNKNOWN, STRING, BOOLEAN, CHARACTER, INTEGER, INTEGERORFLOAT, FLOAT, BORDER, ICON, INSETS, DIMENSION, COLOR, FONT,
 		SCALEDINTEGER, SCALEDFLOAT, SCALEDINSETS, SCALEDDIMENSION, INSTANCE, CLASS, GRAYFILTER, NULL, LAZY }
 
-	private static ValueType[] tempResultValueType = new ValueType[1];
+	private static final ValueType[] tempResultValueType = new ValueType[1];
 	private static Map<Class<?>, ValueType> javaValueTypes;
 	private static Map<String, ValueType> knownValueTypes;
 
@@ -466,6 +466,10 @@ class UIDefaultsLoader
 				if( knownValueTypes == null ) {
 					// create lazy
 					knownValueTypes = new HashMap<>();
+					// system colors
+					knownValueTypes.put( "activeCaptionBorder", ValueType.COLOR );
+					knownValueTypes.put( "inactiveCaptionBorder", ValueType.COLOR );
+					knownValueTypes.put( "windowBorder", ValueType.COLOR );
 					// SplitPane
 					knownValueTypes.put( "SplitPane.dividerSize", ValueType.INTEGER );
 					knownValueTypes.put( "SplitPaneDivider.gripDotSize", ValueType.INTEGER );
@@ -780,6 +784,7 @@ class UIDefaultsLoader
 				case "tint":			return parseColorMix( "#fff", params, resolver, reportError );
 				case "shade":			return parseColorMix( "#000", params, resolver, reportError );
 				case "contrast":		return parseColorContrast( params, resolver, reportError );
+				case "over":			return parseColorOver( params, resolver, reportError );
 			}
 		} finally {
 			parseColorDepth--;
@@ -792,7 +797,7 @@ class UIDefaultsLoader
 	 * Syntax: if(condition,trueValue,falseValue)
 	 * <p>
 	 * This "if" function is only used if the "if" is passed as parameter to another
-	 * color function. Otherwise the general "if" function is used.
+	 * color function. Otherwise, the general "if" function is used.
 	 */
 	private static Object parseColorIf( String value, List<String> params, Function<String, String> resolver, boolean reportError ) {
 		if( params.size() != 3 )
@@ -847,7 +852,7 @@ class UIDefaultsLoader
 		int lightness = parsePercentage( params.get( 2 ) );
 		int alpha = hasAlpha ? parsePercentage( params.get( 3 ) ) : 100;
 
-		float[] hsl = new float[] { hue, saturation, lightness };
+		float[] hsl = { hue, saturation, lightness };
 		return new ColorUIResource( HSLColor.toRGB( hsl, alpha / 100f ) );
 	}
 
@@ -902,21 +907,32 @@ class UIDefaultsLoader
 	 * Syntax: fade(color,amount[,options])
 	 *   - color: a color (e.g. #f00) or a color function
 	 *   - amount: percentage 0-100%
-	 *   - options: [derived]
+	 *   - options: [derived] [lazy]
 	 */
 	private static Object parseColorFade( List<String> params, Function<String, String> resolver, boolean reportError ) {
 		String colorStr = params.get( 0 );
 		int amount = 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.Fade( amount );
 
+		if( lazy ) {
+			return (LazyValue) t -> {
+				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, reportError );
 	}
@@ -1030,6 +1046,34 @@ class UIDefaultsLoader
 		return parseColorOrFunction( resolver.apply( darkOrLightColor ), resolver, reportError );
 	}
 
+	/**
+	 * Syntax: over(foreground,background)
+	 *   - foreground: a foreground color (e.g. #f00) or a color function;
+	 *                 the alpha of this color is used as weight to mix the two colors
+	 *   - background: a background color (e.g. #f00) or a color function
+	 */
+	private static ColorUIResource parseColorOver( List<String> params, Function<String, String> resolver, boolean reportError ) {
+		String foregroundStr = params.get( 0 );
+		String backgroundStr = params.get( 1 );
+
+		// parse foreground color
+		ColorUIResource foreground = (ColorUIResource) parseColorOrFunction( resolver.apply( foregroundStr ), resolver, reportError );
+		if( foreground == null || foreground.getAlpha() == 255 )
+			return foreground;
+
+		// foreground color without alpha
+		ColorUIResource foreground2 = new ColorUIResource( foreground.getRGB() );
+
+		// parse background color
+		ColorUIResource background = (ColorUIResource) parseColorOrFunction( resolver.apply( backgroundStr ), resolver, reportError );
+		if( background == null )
+			return foreground2;
+
+		// create new color
+		float weight = foreground.getAlpha() / 255f;
+		return new ColorUIResource( ColorFunctions.mix( foreground2, background, weight ) );
+	}
+
 	private static Object parseFunctionBaseColor( String colorStr, ColorFunction function,
 		boolean derived, Function<String, String> resolver, boolean reportError )
 	{
@@ -1198,7 +1242,7 @@ class UIDefaultsLoader
 		}
 
 		Integer integer = parseInteger( value, true );
-		if( integer.intValue() < min || integer.intValue() > max )
+		if( integer < min || integer > max )
 			throw new NumberFormatException( "integer '" + value + "' out of range (" + min + '-' + max + ')' );
 		return integer;
 	}
@@ -1239,28 +1283,28 @@ class UIDefaultsLoader
 
 	private static ActiveValue parseScaledInteger( String value ) {
 		int val = parseInteger( value, true );
-		return (ActiveValue) t -> {
+		return t -> {
 			return UIScale.scale( val );
 		};
 	}
 
 	private static ActiveValue parseScaledFloat( String value ) {
 		float val = parseFloat( value, true );
-		return (ActiveValue) t -> {
+		return t -> {
 			return UIScale.scale( val );
 		};
 	}
 
 	private static ActiveValue parseScaledInsets( String value ) {
 		Insets insets = parseInsets( value );
-		return (ActiveValue) t -> {
+		return t -> {
 			return UIScale.scale( insets );
 		};
 	}
 
 	private static ActiveValue parseScaledDimension( String value ) {
 		Dimension dimension = parseDimension( value );
-		return (ActiveValue) t -> {
+		return t -> {
 			return UIScale.scale( dimension );
 		};
 	}

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

@@ -23,13 +23,13 @@ import java.awt.Graphics2D;
 import com.formdev.flatlaf.util.AnimatedIcon;
 
 /**
- * Base class for animated icons that scales width and height, creates and initializes
+ * Base class for animated icons that scale width and height, creates and initializes
  * a scaled graphics context for icon painting.
  * <p>
  * Subclasses do not need to scale icon painting.
  * <p>
  * This class does not store any state information (needed for animation) in its instance.
- * Instead a client property is set on the painted component.
+ * Instead, a client property is set on the painted component.
  * This makes it possible to use a share icon instance for multiple components.
  *
  * @author Karl Tauber

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

@@ -51,7 +51,7 @@ public class FlatAscendingSortIcon
 		boolean chevron = this.chevron;
 		Color sortIconColor = this.sortIconColor;
 
-		// Because this icons are always shared for all table headers,
+		// Because this icon is always shared for all table headers,
 		// get icon specific style from FlatTableHeaderUI.
 		JTableHeader tableHeader = (JTableHeader) SwingUtilities.getAncestorOfClass( JTableHeader.class, c );
 		if( tableHeader != null ) {

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

@@ -49,6 +49,14 @@ public class FlatCapsLockIcon
 		}
 	}
 
+	/** @since 2.5 */
+	public Object getStyleableValue( String key ) {
+		switch( key ) {
+			case "capsLockIconColor": return color;
+			default: return null;
+		}
+	}
+
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		/*

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

@@ -172,6 +172,11 @@ public class FlatCheckBoxIcon
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	public Object getStyleableValue( String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		boolean indeterminate = isIndeterminate( c );

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

@@ -59,6 +59,11 @@ public class FlatCheckBoxMenuItemIcon
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	public Object getStyleableValue( String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	protected void paintIcon( Component c, Graphics2D g2 ) {
 		boolean selected = (c instanceof AbstractButton) && ((AbstractButton)c).isSelected();

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

@@ -69,6 +69,11 @@ public class FlatClearIcon
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	public Object getStyleableValue( String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		if( !ignoreButtonState && c instanceof AbstractButton ) {

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

@@ -84,6 +84,11 @@ public class FlatHelpButtonIcon
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	public Object getStyleableValue( String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	protected void paintIcon( Component c, Graphics2D g2 ) {
 		/*
@@ -96,8 +101,8 @@ public class FlatHelpButtonIcon
 			</svg>
 		*/
 
-		boolean enabled = c.isEnabled();
-		boolean focused = FlatUIUtils.isPermanentFocusOwner( c );
+		boolean enabled = c == null || c.isEnabled();
+		boolean focused = c != null && FlatUIUtils.isPermanentFocusOwner( c );
 
 		float xy = 0.5f;
 		float wh = iconSize() - 1;

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

@@ -61,9 +61,14 @@ public class FlatMenuArrowIcon
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	public Object getStyleableValue( String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
-		if( !c.getComponentOrientation().isLeftToRight() )
+		if( c != null && !c.getComponentOrientation().isLeftToRight() )
 			g.rotate( Math.toRadians( 180 ), width / 2., height / 2. );
 
 		g.setColor( getArrowColor( c ) );
@@ -82,7 +87,7 @@ public class FlatMenuArrowIcon
 		if( c instanceof JMenu && ((JMenu)c).isSelected() && !isUnderlineSelection() )
 			return selectionForeground;
 
-		return c.isEnabled() ? arrowColor : disabledArrowColor;
+		return c == null || c.isEnabled() ? arrowColor : disabledArrowColor;
 	}
 
 	protected boolean isUnderlineSelection() {

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

@@ -67,6 +67,11 @@ public class FlatSearchIcon
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	public Object getStyleableValue( String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		/*

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

@@ -76,6 +76,11 @@ public class FlatTabbedPaneCloseIcon
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	public Object getStyleableValue( String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
 		// paint background

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

@@ -76,7 +76,7 @@ public class FlatTreeCollapsedIcon
 	}
 
 	/**
-	 * Because this icons are always shared for all trees,
+	 * Because this icon is always shared for all trees,
 	 * get icon specific style from FlatTreeUI.
 	 */
 	static <T> T getStyleFromTreeUI( Component c, Function<FlatTreeUI, T> f ) {

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

@@ -20,6 +20,7 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.Dimension;
 import java.awt.Graphics2D;
+import java.awt.RenderingHints;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
 import com.formdev.flatlaf.ui.FlatUIUtils;
@@ -65,8 +66,14 @@ public abstract class FlatWindowAbstractIcon
 	protected void paintBackground( Component c, Graphics2D g ) {
 		Color background = FlatButtonUI.buttonStateColor( c, null, null, null, hoverBackground, pressedBackground );
 		if( background != null ) {
+			// disable antialiasing for background rectangle painting to avoid blury edges when scaled (e.g. at 125% or 175%)
+			Object oldHint = g.getRenderingHint( RenderingHints.KEY_ANTIALIASING );
+			g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF );
+
 			g.setColor( FlatUIUtils.deriveColor( background, c.getBackground() ) );
 			g.fillRect( 0, 0, width, height );
+
+			g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, oldHint );
 		}
 	}
 

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

@@ -24,6 +24,7 @@ import java.awt.geom.Line2D;
 import java.awt.geom.Path2D;
 import javax.swing.UIManager;
 import com.formdev.flatlaf.ui.FlatButtonUI;
+import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * "close" icon for windows (frames and dialogs).
@@ -54,7 +55,7 @@ public class FlatWindowCloseIcon
 		int iy = y + ((height - iwh) / 2);
 		int ix2 = ix + iwh - 1;
 		int iy2 = iy + iwh - 1;
-		int thickness = (int) scaleFactor;
+		float thickness = SystemInfo.isWindows_11_orLater ? (float) scaleFactor : (int) scaleFactor;
 
 		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
 		path.append( new Line2D.Float( ix, iy, ix2, iy2 ), false );

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

@@ -18,6 +18,7 @@ package com.formdev.flatlaf.icons;
 
 import java.awt.Graphics2D;
 import com.formdev.flatlaf.ui.FlatUIUtils;
+import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * "maximize" icon for windows (frames and dialogs).
@@ -35,8 +36,11 @@ public class FlatWindowMaximizeIcon
 		int iwh = (int) (10 * scaleFactor);
 		int ix = x + ((width - iwh) / 2);
 		int iy = y + ((height - iwh) / 2);
-		int thickness = (int) scaleFactor;
+		float thickness = SystemInfo.isWindows_11_orLater ? (float) scaleFactor : (int) scaleFactor;
+		int arc = Math.max( (int) (1.5 * scaleFactor), 2 );
 
-		g.fill( FlatUIUtils.createRectangle( ix, iy, iwh, iwh, thickness ) );
+		g.fill( SystemInfo.isWindows_11_orLater
+			? FlatUIUtils.createRoundRectangle( ix, iy, iwh, iwh, thickness, arc, arc, arc, arc )
+			: FlatUIUtils.createRectangle( ix, iy, iwh, iwh, thickness ) );
 	}
 }

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

@@ -21,6 +21,7 @@ import java.awt.geom.Area;
 import java.awt.geom.Path2D;
 import java.awt.geom.Rectangle2D;
 import com.formdev.flatlaf.ui.FlatUIUtils;
+import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * "restore" icon for windows (frames and dialogs).
@@ -38,18 +39,33 @@ public class FlatWindowRestoreIcon
 		int iwh = (int) (10 * scaleFactor);
 		int ix = x + ((width - iwh) / 2);
 		int iy = y + ((height - iwh) / 2);
-		int thickness = (int) scaleFactor;
+		float thickness = SystemInfo.isWindows_11_orLater ? (float) scaleFactor : (int) scaleFactor;
+		int arc = Math.max( (int) (1.5 * scaleFactor), 2 );
+		int arcOuter = (int) (arc + (1.5 * scaleFactor));
 
 		int rwh = (int) (8 * scaleFactor);
 		int ro2 = iwh - rwh;
 
-		Path2D r1 = FlatUIUtils.createRectangle( ix + ro2, iy, rwh, rwh, thickness );
-		Path2D r2 = FlatUIUtils.createRectangle( ix, iy + ro2, rwh, rwh, thickness );
+		// upper-right rectangle
+		Path2D r1 = SystemInfo.isWindows_11_orLater
+			? FlatUIUtils.createRoundRectangle( ix + ro2, iy, rwh, rwh, thickness, arc, arcOuter, arc, arc )
+			: FlatUIUtils.createRectangle( ix + ro2, iy, rwh, rwh, thickness );
 
+		// lower-left rectangle
+		Path2D r2 = SystemInfo.isWindows_11_orLater
+			? FlatUIUtils.createRoundRectangle( ix, iy + ro2, rwh, rwh, thickness, arc, arc, arc, arc )
+			: FlatUIUtils.createRectangle( ix, iy + ro2, rwh, rwh, thickness );
+
+		// paint upper-right rectangle
 		Area area = new Area( r1 );
-		area.subtract( new Area( new Rectangle2D.Float( ix, iy + ro2, rwh, rwh ) ) );
+		if( SystemInfo.isWindows_11_orLater ) {
+			area.subtract( new Area( new Rectangle2D.Float( ix, (float) (iy + scaleFactor), rwh, rwh ) ) );
+			area.subtract( new Area( new Rectangle2D.Float( (float) (ix + scaleFactor), iy + ro2, rwh, rwh ) ) );
+		} else
+			area.subtract( new Area( new Rectangle2D.Float( ix, iy + ro2, rwh, rwh ) ) );
 		g.fill( area );
 
+		// paint lower-left rectangle
 		g.fill( r2 );
 	}
 }

flatlaf-core/src/main/java/com/formdev/flatlaf/resources/EmptyPackage.java

@@ -18,8 +18,8 @@ package com.formdev.flatlaf.resources;
 
 /**
  * The only purpose of this file is to add a .class file to this package to make it non-empty.
- * Otherwise the compiler outputs a warning because this package is opend in module-info.java.
- * Also when using --patch-module (e.g. from an IDE), an error would occur for empty packages.
+ * Otherwise, the compiler outputs a warning because this package is opened in module-info.java.
+ * Also, when using --patch-module (e.g. from an IDE), an error would occur for empty packages.
  *
  * @author Karl Tauber
  */

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

@@ -37,7 +37,7 @@ public class FlatArrowButton
 	extends BasicArrowButton
 	implements UIResource
 {
-	public static final int DEFAULT_ARROW_WIDTH = 8;
+	public static final int DEFAULT_ARROW_WIDTH = 9;
 
 	protected boolean chevron;
 	protected Color foreground;
@@ -211,6 +211,6 @@ public class FlatArrowButton
 		if( vert && parent instanceof JComponent && FlatUIUtils.hasRoundBorder( (JComponent) parent ) )
 			x -= scale( parent.getComponentOrientation().isLeftToRight() ? 1 : -1 );
 
-		FlatUIUtils.paintArrow( g, x, 0, getWidth(), getHeight(), getDirection(), chevron, arrowWidth, xOffset, yOffset );
+		FlatUIUtils.paintArrow( g, x, 0, getWidth(), getHeight(), getDirection(), chevron, getArrowWidth(), getXOffset(), getYOffset() );
 	}
 }

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

@@ -101,6 +101,12 @@ public class FlatBorder
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
 		Graphics2D g2 = (Graphics2D) g.create();

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

@@ -159,7 +159,7 @@ public class FlatButtonBorder
 	public Insets getBorderInsets( Component c, Insets insets ) {
 		if( FlatButtonUI.isToolBarButton( c ) ) {
 			// In toolbars, use button margin only if explicitly set.
-			// Otherwise use toolbar margin specified in UI defaults.
+			// Otherwise, use toolbar margin specified in UI defaults.
 			Insets margin = (c instanceof AbstractButton)
 				? ((AbstractButton)c).getMargin()
 				: null;

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

@@ -38,15 +38,19 @@ import javax.swing.ButtonModel;
 import javax.swing.Icon;
 import javax.swing.JButton;
 import javax.swing.JComponent;
+import javax.swing.JTextField;
 import javax.swing.JToggleButton;
 import javax.swing.JToolBar;
 import javax.swing.LookAndFeel;
+import javax.swing.SwingConstants;
+import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.plaf.ButtonUI;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicButtonListener;
 import javax.swing.plaf.basic.BasicButtonUI;
+import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.icons.FlatHelpButtonIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
@@ -74,20 +78,27 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Button.startBackground			Color	optional; if set, a gradient paint is used and Button.background is ignored
  * @uiDefault Button.endBackground				Color	optional; if set, a gradient paint is used
  * @uiDefault Button.focusedBackground			Color	optional
+ * @uiDefault Button.focusedForeground			Color	optional
  * @uiDefault Button.hoverBackground			Color	optional
+ * @uiDefault Button.hoverForeground			Color	optional
  * @uiDefault Button.pressedBackground			Color	optional
+ * @uiDefault Button.pressedForeground			Color	optional
  * @uiDefault Button.selectedBackground			Color
  * @uiDefault Button.selectedForeground			Color
  * @uiDefault Button.disabledBackground			Color	optional
  * @uiDefault Button.disabledText				Color
  * @uiDefault Button.disabledSelectedBackground	Color
+ * @uiDefault Button.disabledSelectedForeground	Color	optional
  * @uiDefault Button.default.background			Color
  * @uiDefault Button.default.startBackground	Color	optional; if set, a gradient paint is used and Button.default.background is ignored
  * @uiDefault Button.default.endBackground		Color	optional; if set, a gradient paint is used
  * @uiDefault Button.default.foreground			Color
  * @uiDefault Button.default.focusedBackground	Color	optional
+ * @uiDefault Button.default.focusedForeground	Color	optional
  * @uiDefault Button.default.hoverBackground	Color	optional
+ * @uiDefault Button.default.hoverForeground	Color	optional
  * @uiDefault Button.default.pressedBackground	Color	optional
+ * @uiDefault Button.default.pressedForeground	Color	optional
  * @uiDefault Button.default.boldText			boolean
  * @uiDefault Button.paintShadow				boolean	default is false
  * @uiDefault Button.shadowWidth				int		default is 2
@@ -95,8 +106,13 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Button.default.shadowColor		Color	optional
  * @uiDefault Button.toolbar.spacingInsets		Insets
  * @uiDefault Button.toolbar.hoverBackground	Color
+ * @uiDefault Button.toolbar.hoverForeground	Color	optional
  * @uiDefault Button.toolbar.pressedBackground	Color
+ * @uiDefault Button.toolbar.pressedForeground	Color	optional
  * @uiDefault Button.toolbar.selectedBackground	Color
+ * @uiDefault Button.toolbar.selectedForeground	Color	optional
+ * @uiDefault Button.toolbar.disabledSelectedBackground	Color	optional
+ * @uiDefault Button.toolbar.disabledSelectedForeground	Color	optional
  *
  * @author Karl Tauber
  */
@@ -113,20 +129,27 @@ public class FlatButtonUI
 	protected Color startBackground;
 	protected Color endBackground;
 	@Styleable protected Color focusedBackground;
+	/** @since 2.3 */ @Styleable protected Color focusedForeground;
 	@Styleable protected Color hoverBackground;
+	/** @since 2.3 */ @Styleable protected Color hoverForeground;
 	@Styleable protected Color pressedBackground;
+	/** @since 2.3 */ @Styleable protected Color pressedForeground;
 	@Styleable protected Color selectedBackground;
 	@Styleable protected Color selectedForeground;
 	@Styleable protected Color disabledBackground;
 	@Styleable protected Color disabledText;
 	@Styleable protected Color disabledSelectedBackground;
+	/** @since 2.3 */ @Styleable protected Color disabledSelectedForeground;
 
 	@Styleable(dot=true) protected Color defaultBackground;
 	protected Color defaultEndBackground;
 	@Styleable(dot=true) protected Color defaultForeground;
 	@Styleable(dot=true) protected Color defaultFocusedBackground;
+	/** @since 2.3 */ @Styleable(dot=true) protected Color defaultFocusedForeground;
 	@Styleable(dot=true) protected Color defaultHoverBackground;
+	/** @since 2.3 */ @Styleable(dot=true) protected Color defaultHoverForeground;
 	@Styleable(dot=true) protected Color defaultPressedBackground;
+	/** @since 2.3 */ @Styleable(dot=true) protected Color defaultPressedForeground;
 	@Styleable(dot=true) protected boolean defaultBoldText;
 
 	@Styleable protected boolean paintShadow;
@@ -135,8 +158,13 @@ public class FlatButtonUI
 	@Styleable(dot=true) protected Color defaultShadowColor;
 
 	@Styleable(dot=true) protected Color toolbarHoverBackground;
+	/** @since 2.3 */ @Styleable(dot=true) protected Color toolbarHoverForeground;
 	@Styleable(dot=true) protected Color toolbarPressedBackground;
+	/** @since 2.3 */ @Styleable(dot=true) protected Color toolbarPressedForeground;
 	@Styleable(dot=true) protected Color toolbarSelectedBackground;
+	/** @since 2.3 */ @Styleable(dot=true) protected Color toolbarSelectedForeground;
+	/** @since 2.3 */ @Styleable(dot=true) protected Color toolbarDisabledSelectedBackground;
+	/** @since 2.3 */ @Styleable(dot=true) protected Color toolbarDisabledSelectedForeground;
 
 	// only used via styling (not in UI defaults, but has likewise client properties)
 	/** @since 2 */ @Styleable protected String buttonType;
@@ -153,7 +181,7 @@ public class FlatButtonUI
 	private AtomicBoolean borderShared;
 
 	public static ComponentUI createUI( JComponent c ) {
-		return FlatUIUtils.canUseSharedUI( c )
+		return FlatUIUtils.canUseSharedUI( c ) && !FlatUIUtils.needsLightAWTPeer( c )
 			? FlatUIUtils.createSharedUI( FlatButtonUI.class, () -> new FlatButtonUI( true ) )
 			: new FlatButtonUI( false );
 	}
@@ -165,6 +193,13 @@ public class FlatButtonUI
 
 	@Override
 	public void installUI( JComponent c ) {
+		if( FlatUIUtils.needsLightAWTPeer( c ) )
+			FlatUIUtils.runWithLightAWTPeerUIDefaults( () -> installUIImpl( c ) );
+		else
+			installUIImpl( c );
+	}
+
+	private void installUIImpl( JComponent c ) {
 		super.installUI( c );
 
 		installStyle( (AbstractButton) c );
@@ -186,20 +221,27 @@ public class FlatButtonUI
 			startBackground = UIManager.getColor( prefix + "startBackground" );
 			endBackground = UIManager.getColor( prefix + "endBackground" );
 			focusedBackground = UIManager.getColor( prefix + "focusedBackground" );
+			focusedForeground = UIManager.getColor( prefix + "focusedForeground" );
 			hoverBackground = UIManager.getColor( prefix + "hoverBackground" );
+			hoverForeground = UIManager.getColor( prefix + "hoverForeground" );
 			pressedBackground = UIManager.getColor( prefix + "pressedBackground" );
+			pressedForeground = UIManager.getColor( prefix + "pressedForeground" );
 			selectedBackground = UIManager.getColor( prefix + "selectedBackground" );
 			selectedForeground = UIManager.getColor( prefix + "selectedForeground" );
 			disabledBackground = UIManager.getColor( prefix + "disabledBackground" );
 			disabledText = UIManager.getColor( prefix + "disabledText" );
 			disabledSelectedBackground = UIManager.getColor( prefix + "disabledSelectedBackground" );
+			disabledSelectedForeground = UIManager.getColor( prefix + "disabledSelectedForeground" );
 
 			defaultBackground = FlatUIUtils.getUIColor( "Button.default.startBackground", "Button.default.background" );
 			defaultEndBackground = UIManager.getColor( "Button.default.endBackground" );
 			defaultForeground = UIManager.getColor( "Button.default.foreground" );
 			defaultFocusedBackground = UIManager.getColor( "Button.default.focusedBackground" );
+			defaultFocusedForeground = UIManager.getColor( "Button.default.focusedForeground" );
 			defaultHoverBackground = UIManager.getColor( "Button.default.hoverBackground" );
+			defaultHoverForeground = UIManager.getColor( "Button.default.hoverForeground" );
 			defaultPressedBackground = UIManager.getColor( "Button.default.pressedBackground" );
+			defaultPressedForeground = UIManager.getColor( "Button.default.pressedForeground" );
 			defaultBoldText = UIManager.getBoolean( "Button.default.boldText" );
 
 			paintShadow = UIManager.getBoolean( "Button.paintShadow" );
@@ -208,8 +250,13 @@ public class FlatButtonUI
 			defaultShadowColor = UIManager.getColor( "Button.default.shadowColor" );
 
 			toolbarHoverBackground = UIManager.getColor( prefix + "toolbar.hoverBackground" );
+			toolbarHoverForeground = UIManager.getColor( prefix + "toolbar.hoverForeground" );
 			toolbarPressedBackground = UIManager.getColor( prefix + "toolbar.pressedBackground" );
+			toolbarPressedForeground = UIManager.getColor( prefix + "toolbar.pressedForeground" );
 			toolbarSelectedBackground = UIManager.getColor( prefix + "toolbar.selectedBackground" );
+			toolbarSelectedForeground = UIManager.getColor( prefix + "toolbar.selectedForeground" );
+			toolbarDisabledSelectedBackground = UIManager.getColor( prefix + "toolbar.disabledSelectedBackground" );
+			toolbarDisabledSelectedForeground = UIManager.getColor( prefix + "toolbar.disabledSelectedForeground" );
 
 			helpButtonIcon = UIManager.getIcon( "HelpButton.icon" );
 			defaultMargin = UIManager.getInsets( prefix + "margin" );
@@ -259,6 +306,10 @@ public class FlatButtonUI
 				b.repaint();
 				break;
 
+			case OUTLINE:
+				b.repaint();
+				break;
+
 			case STYLE:
 			case STYLE_CLASS:
 				if( shared && FlatStylingSupport.hasStyleProperty( b ) ) {
@@ -322,6 +373,18 @@ public class FlatButtonUI
 		return infos;
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		if( key.startsWith( "help." ) ) {
+			return (helpButtonIcon instanceof FlatHelpButtonIcon)
+				? ((FlatHelpButtonIcon)helpButtonIcon).getStyleableValue( key.substring( "help.".length() ) )
+				: null;
+		}
+
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, c.getBorder(), key );
+	}
+
 	static boolean isContentAreaFilled( Component c ) {
 		return !(c instanceof AbstractButton) || ((AbstractButton)c).isContentAreaFilled();
 	}
@@ -336,7 +399,7 @@ public class FlatButtonUI
 
 	/**
 	 * Returns true if the button has an icon but no text,
-	 * or it it does not have an icon and the text is either "..." or one character.
+	 * or it does not have an icon and the text is either "..." or one character.
 	 */
 	static boolean isIconOnlyOrSingleCharacterButton( Component c ) {
 		if( !(c instanceof JButton) && !(c instanceof JToggleButton) )
@@ -420,11 +483,21 @@ public class FlatButtonUI
 		try {
 			FlatUIUtils.setRenderingHints( g2 );
 
+			boolean def = isDefaultButton( c );
 			boolean isToolBarButton = isToolBarButton( c );
 			float focusWidth = isToolBarButton ? 0 : FlatUIUtils.getBorderFocusWidth( c );
 			float arc = FlatUIUtils.getBorderArc( c );
+			float textFieldArc = 0;
 
-			boolean def = isDefaultButton( c );
+			// if toolbar button is in leading/trailing component of a text field,
+			// increase toolbar button arc to match text field arc (if necessary)
+			if( isToolBarButton &&
+				FlatClientProperties.clientProperty( c, STYLE_CLASS, "", String.class ).contains( "inTextField" ) )
+			{
+				JTextField textField = (JTextField) SwingUtilities.getAncestorOfClass( JTextField.class, c );
+				if( textField != null )
+					textFieldArc = FlatUIUtils.getBorderArc( textField );
+			}
 
 			int x = 0;
 			int y = 0;
@@ -437,8 +510,15 @@ public class FlatButtonUI
 				y += spacing.top;
 				width -= spacing.left + spacing.right;
 				height -= spacing.top + spacing.bottom;
+
+				// reduce text field arc
+				textFieldArc -= spacing.top + spacing.bottom;
 			}
 
+			// increase toolbar button arc to match text field arc (if necessary)
+			if( arc < textFieldArc )
+				arc = textFieldArc;
+
 			// paint shadow
 			Color shadowColor = def ? defaultShadowColor : this.shadowColor;
 			if( paintShadow &&
@@ -470,6 +550,23 @@ public class FlatButtonUI
 		super.paint( FlatLabelUI.createGraphicsHTMLTextYCorrection( g, c ), c );
 	}
 
+	@Override
+	protected void paintIcon( Graphics g, JComponent c, Rectangle iconRect ) {
+		// correct icon location when using bold font for default button
+		int xOffset = defaultBoldPlainWidthDiff( c ) / 2;
+		if( xOffset > 0 ) {
+			boolean ltr = c.getComponentOrientation().isLeftToRight();
+			switch( ((AbstractButton)c).getHorizontalTextPosition() ) {
+				case SwingConstants.RIGHT:    iconRect.x -= xOffset; break;
+				case SwingConstants.LEFT:     iconRect.x += xOffset; break;
+				case SwingConstants.TRAILING: iconRect.x -= ltr ? xOffset : -xOffset; break;
+				case SwingConstants.LEADING:  iconRect.x += ltr ? xOffset : -xOffset; break;
+			}
+		}
+
+		super.paintIcon( g, c, iconRect );
+	}
+
 	@Override
 	protected void paintText( Graphics g, AbstractButton b, Rectangle textRect, String text ) {
 		if( isHelpButton( b ) )
@@ -490,6 +587,8 @@ 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;
 
@@ -503,11 +602,14 @@ public class FlatButtonUI
 
 		// selected state
 		if( ((AbstractButton)c).isSelected() ) {
-			// in toolbar use same background colors for disabled and enabled because
+			// in toolbar, if toolbarDisabledSelectedBackground is null,
+			// use same background colors for disabled and enabled because
 			// we assume that toolbar icon is shown disabled
 			return buttonStateColor( c,
 				toolBarButton ? toolbarSelectedBackground : selectedBackground,
-				toolBarButton ? toolbarSelectedBackground : disabledSelectedBackground,
+				toolBarButton
+					? (toolbarDisabledSelectedBackground != null ? toolbarDisabledSelectedBackground : toolbarSelectedBackground)
+					: disabledSelectedBackground,
 				null,
 				null,
 				toolBarButton ? toolbarPressedBackground : pressedBackground );
@@ -534,6 +636,9 @@ public class FlatButtonUI
 	}
 
 	protected Color getBackgroundBase( JComponent c, boolean def ) {
+		if( FlatUIUtils.isAWTPeer( c ) )
+			return background;
+
 		// use component background if explicitly set
 		Color bg = c.getBackground();
 		if( isCustomBackground( bg ) )
@@ -549,6 +654,9 @@ public class FlatButtonUI
 	public static Color buttonStateColor( Component c, Color enabledColor, Color disabledColor,
 		Color focusedColor, Color hoverColor, Color pressedColor )
 	{
+		if( c == null )
+			return enabledColor;
+
 		if( !c.isEnabled() )
 			return disabledColor;
 
@@ -569,18 +677,48 @@ public class FlatButtonUI
 	}
 
 	protected Color getForeground( JComponent c ) {
-		if( !c.isEnabled() )
-			return disabledText;
+		boolean toolBarButton = isToolBarButton( c ) || isBorderlessButton( c );
 
-		if( ((AbstractButton)c).isSelected() && !(isToolBarButton( c ) || isBorderlessButton( c )) )
-			return selectedForeground;
+		// selected state
+		if( ((AbstractButton)c).isSelected() ) {
+			return buttonStateColor( c,
+				toolBarButton
+					? (toolbarSelectedForeground != null ? toolbarSelectedForeground : c.getForeground())
+					: selectedForeground,
+				toolBarButton
+					? (toolbarDisabledSelectedForeground != null ? toolbarDisabledSelectedForeground : disabledText)
+					: (disabledSelectedForeground != null ? disabledSelectedForeground : disabledText),
+				null,
+				null,
+				toolBarButton ? toolbarPressedForeground : pressedForeground );
+		}
 
+		// toolbar button
+		if( toolBarButton ) {
+			return buttonStateColor( c,
+				c.getForeground(),
+				disabledText,
+				null,
+				toolbarHoverForeground,
+				toolbarPressedForeground );
+		}
+
+		boolean def = isDefaultButton( c );
+		return buttonStateColor( c,
+			getForegroundBase( c, def ),
+			disabledText,
+			isCustomForeground( c.getForeground() ) ? null : (def ? defaultFocusedForeground : focusedForeground),
+			def ? defaultHoverForeground : hoverForeground,
+			def ? defaultPressedForeground : pressedForeground );
+	}
+
+	/** @since 2.3 */
+	protected Color getForegroundBase( JComponent c, boolean def ) {
 		// use component foreground if explicitly set
 		Color fg = c.getForeground();
 		if( isCustomForeground( fg ) )
 			return fg;
 
-		boolean def = isDefaultButton( c );
 		return def ? defaultForeground : fg;
 	}
 
@@ -597,6 +735,9 @@ public class FlatButtonUI
 		if( prefSize == null )
 			return null;
 
+		// increase width when using bold font for default button
+		prefSize.width += defaultBoldPlainWidthDiff( c );
+
 		// make square or apply minimum width/height
 		boolean isIconOnlyOrSingleCharacter = isIconOnlyOrSingleCharacterButton( c );
 		if( clientPropertyBoolean( c, SQUARE_SIZE, squareSize ) ) {
@@ -617,6 +758,23 @@ public class FlatButtonUI
 		return prefSize;
 	}
 
+	private int defaultBoldPlainWidthDiff( JComponent c ) {
+		if( defaultBoldText && isDefaultButton( c ) && c.getFont() instanceof UIResource ) {
+			String text = ((AbstractButton)c).getText();
+			if( text == null || text.isEmpty() )
+				return 0;
+
+			Font font = c.getFont();
+			Font boldFont = font.deriveFont( Font.BOLD );
+			int boldWidth = c.getFontMetrics( boldFont ).stringWidth( text );
+			int plainWidth = c.getFontMetrics( font ).stringWidth( text );
+			if( boldWidth > plainWidth )
+				return boldWidth - plainWidth;
+		}
+
+		return 0;
+	}
+
 	private boolean hasDefaultMargins( JComponent c ) {
 		Insets margin = ((AbstractButton)c).getMargin();
 		return margin instanceof UIResource && Objects.equals( margin, defaultMargin );

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

@@ -96,7 +96,7 @@ public class FlatCaret
 
 			// if text component is focused, then caret and selection are visible,
 			// but when switching theme, the component does not yet have
-			// an highlighter and the selection is not painted
+			// a highlighter and the selection is not painted
 			// --> make selection temporary invisible later, then the caret
 			//     adds selection highlights to the text component highlighter
 			if( isSelectionVisible() ) {
@@ -236,7 +236,7 @@ public class FlatCaret
 		if( selectAllOnFocusPolicy == null )
 			selectAllOnFocusPolicy = this.selectAllOnFocusPolicy;
 
-		if( SELECT_ALL_ON_FOCUS_POLICY_NEVER.equals( selectAllOnFocusPolicy ) )
+		if( selectAllOnFocusPolicy == null || SELECT_ALL_ON_FOCUS_POLICY_NEVER.equals( selectAllOnFocusPolicy ) )
 			return;
 
 		if( !SELECT_ALL_ON_FOCUS_POLICY_ALWAYS.equals( selectAllOnFocusPolicy ) ) {

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

@@ -16,18 +16,20 @@
 
 package com.formdev.flatlaf.ui;
 
-import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Graphics;
 import java.beans.PropertyChangeListener;
+import java.lang.invoke.MethodHandles;
 import java.util.Map;
 import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.LookAndFeel;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicCheckBoxMenuItemUI;
+import javax.swing.plaf.basic.BasicMenuItemUI;
+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.ui.FlatStylingSupport.UnknownStyleException;
 import com.formdev.flatlaf.util.LoggingFacade;
 
 /**
@@ -58,9 +60,15 @@ import com.formdev.flatlaf.util.LoggingFacade;
  *
  * @author Karl Tauber
  */
+@StyleableField( cls=BasicMenuItemUI.class, key="selectionBackground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="selectionForeground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="disabledForeground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="acceleratorForeground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="acceleratorSelectionForeground" )
+
 public class FlatCheckBoxMenuItemUI
 	extends BasicCheckBoxMenuItemUI
-	implements StyleableUI
+	implements StyleableUI, StyleableLookupProvider
 {
 	private FlatMenuItemRenderer renderer;
 	private Map<String, Object> oldStyleValues;
@@ -119,29 +127,27 @@ public class FlatCheckBoxMenuItemUI
 
 	/** @since 2 */
 	protected Object applyStyleProperty( String key, Object value ) {
-		try {
-			return renderer.applyStyleProperty( key, value );
-		} catch ( UnknownStyleException ex ) {
-			// ignore
-		}
-
-		Object oldValue;
-		switch( key ) {
-			// BasicMenuItemUI
-			case "selectionBackground": oldValue = selectionBackground; selectionBackground = (Color) value; return oldValue;
-			case "selectionForeground": oldValue = selectionForeground; selectionForeground = (Color) value; return oldValue;
-			case "disabledForeground": oldValue = disabledForeground; disabledForeground = (Color) value; return oldValue;
-			case "acceleratorForeground": oldValue = acceleratorForeground; acceleratorForeground = (Color) value; return oldValue;
-			case "acceleratorSelectionForeground": oldValue = acceleratorSelectionForeground; acceleratorSelectionForeground = (Color) value; return oldValue;
-		}
-
-		return FlatStylingSupport.applyToAnnotatedObjectOrComponent( this, menuItem, key, value );
+		return FlatMenuItemUI.applyStyleProperty( menuItem, this, renderer, key, value );
 	}
 
 	/** @since 2 */
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
-		return FlatMenuItemUI.getStyleableInfos( renderer );
+		return FlatMenuItemUI.getStyleableInfos( this, renderer );
+	}
+
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatMenuItemUI.getStyleableValue( this, renderer, key );
+	}
+
+	/** @since 2.5 */
+	@Override
+	public MethodHandles.Lookup getLookupForStyling() {
+		// MethodHandles.lookup() is caller sensitive and must be invoked in this class,
+		// otherwise it is not possible to access protected fields in JRE superclass
+		return MethodHandles.lookup();
 	}
 
 	@Override

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

@@ -43,7 +43,7 @@ public class FlatCheckBoxUI
 	extends FlatRadioButtonUI
 {
 	public static ComponentUI createUI( JComponent c ) {
-		return FlatUIUtils.canUseSharedUI( c )
+		return FlatUIUtils.canUseSharedUI( c ) && !FlatUIUtils.needsLightAWTPeer( c )
 			? FlatUIUtils.createSharedUI( FlatCheckBoxUI.class, () -> new FlatCheckBoxUI( true ) )
 			: new FlatCheckBoxUI( false );
 	}

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

@@ -42,6 +42,7 @@ import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
 import java.awt.geom.Rectangle2D;
 import java.beans.PropertyChangeListener;
+import java.lang.invoke.MethodHandles;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicBoolean;
 import javax.swing.AbstractAction;
@@ -70,6 +71,8 @@ import javax.swing.plaf.basic.BasicComboPopup;
 import javax.swing.plaf.basic.ComboPopup;
 import javax.swing.text.JTextComponent;
 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.LoggingFacade;
 import com.formdev.flatlaf.util.SystemInfo;
@@ -86,6 +89,11 @@ import com.formdev.flatlaf.util.SystemInfo;
  * @uiDefault ComboBox.padding					Insets
  * @uiDefault ComboBox.squareButton				boolean	default is true
  *
+ * <!-- BasicComboPopup -->
+ *
+ * @uiDefault ComboBox.selectionBackground		Color
+ * @uiDefault ComboBox.selectionForeground		Color
+ *
  * <!-- FlatComboBoxUI -->
  *
  * @uiDefault ComboBox.minimumWidth				int
@@ -112,9 +120,11 @@ import com.formdev.flatlaf.util.SystemInfo;
  *
  * @author Karl Tauber
  */
+@StyleableField( cls=BasicComboBoxUI.class, key="padding" )
+
 public class FlatComboBoxUI
 	extends BasicComboBoxUI
-	implements StyleableUI
+	implements StyleableUI, StyleableLookupProvider
 {
 	@Styleable protected int minimumWidth;
 	@Styleable protected int editorColumns;
@@ -122,6 +132,7 @@ public class FlatComboBoxUI
 	@Styleable protected String arrowType;
 	protected boolean isIntelliJTheme;
 
+	private Color background;
 	@Styleable protected Color editableBackground;
 	@Styleable protected Color focusedBackground;
 	@Styleable protected Color disabledBackground;
@@ -155,6 +166,13 @@ public class FlatComboBoxUI
 
 	@Override
 	public void installUI( JComponent c ) {
+		if( FlatUIUtils.needsLightAWTPeer( c ) )
+			FlatUIUtils.runWithLightAWTPeerUIDefaults( () -> installUIImpl( c ) );
+		else
+			installUIImpl( c );
+	}
+
+	private void installUIImpl( JComponent c ) {
 		super.installUI( c );
 
 		installStyle();
@@ -217,6 +235,7 @@ public class FlatComboBoxUI
 		arrowType = UIManager.getString( "Component.arrowType" );
 		isIntelliJTheme = UIManager.getBoolean( "Component.isIntelliJTheme" );
 
+		background = UIManager.getColor( "ComboBox.background" );
 		editableBackground = UIManager.getColor( "ComboBox.editableBackground" );
 		focusedBackground = UIManager.getColor( "ComboBox.focusedBackground" );
 		disabledBackground = UIManager.getColor( "ComboBox.disabledBackground" );
@@ -249,6 +268,7 @@ public class FlatComboBoxUI
 	protected void uninstallDefaults() {
 		super.uninstallDefaults();
 
+		background = null;
 		editableBackground = null;
 		focusedBackground = null;
 		disabledBackground = null;
@@ -354,6 +374,7 @@ public class FlatComboBoxUI
 						break;
 
 					case COMPONENT_ROUND_RECT:
+					case OUTLINE:
 						comboBox.repaint();
 						break;
 
@@ -485,13 +506,6 @@ public class FlatComboBoxUI
 
 	/** @since 2 */
 	protected Object applyStyleProperty( String key, Object value ) {
-		// BasicComboBoxUI
-		if( key.equals( "padding" ) ) {
-			Object oldValue = padding;
-			padding = (Insets) value;
-			return oldValue;
-		}
-
 		if( borderShared == null )
 			borderShared = new AtomicBoolean( true );
 		return FlatStylingSupport.applyToAnnotatedObjectOrBorder( this, key, value, comboBox, borderShared );
@@ -500,11 +514,21 @@ public class FlatComboBoxUI
 	/** @since 2 */
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
-		Map<String, Class<?>> infos = new FlatStylingSupport.StyleableInfosMap<>();
-		infos.put( "padding", Insets.class );
-		FlatStylingSupport.collectAnnotatedStyleableInfos( this, infos );
-		FlatStylingSupport.collectStyleableInfos( comboBox.getBorder(), infos );
-		return infos;
+		return FlatStylingSupport.getAnnotatedStyleableInfos( this, comboBox.getBorder() );
+	}
+
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, comboBox.getBorder(), key );
+	}
+
+	/** @since 2.5 */
+	@Override
+	public MethodHandles.Lookup getLookupForStyling() {
+		// MethodHandles.lookup() is caller sensitive and must be invoked in this class,
+		// otherwise it is not possible to access protected fields in JRE superclass
+		return MethodHandles.lookup();
 	}
 
 	@Override
@@ -602,7 +626,7 @@ public class FlatComboBoxUI
 
 		boolean shouldValidate = (c instanceof JPanel);
 
-		paddingBorder.install( c );
+		paddingBorder.install( c, 0 );
 		currentValuePane.paintComponent( g, c, comboBox, bounds.x, bounds.y, bounds.width, bounds.height, shouldValidate );
 		paddingBorder.uninstall();
 
@@ -617,6 +641,9 @@ public class FlatComboBoxUI
 
 	protected Color getBackground( boolean enabled ) {
 		if( enabled ) {
+			if( FlatUIUtils.isAWTPeer( comboBox ) )
+				return background;
+
 			Color background = comboBox.getBackground();
 
 			// always use explicitly set color
@@ -676,7 +703,7 @@ public class FlatComboBoxUI
 
 	@Override
 	protected Dimension getSizeForComponent( Component comp ) {
-		paddingBorder.install( comp );
+		paddingBorder.install( comp, 0 );
 		Dimension size = super.getSizeForComponent( comp );
 		paddingBorder.uninstall();
 		return size;
@@ -699,7 +726,7 @@ public class FlatComboBoxUI
 				return true;
 
 			Component editorComponent = comboBox.getEditor().getEditorComponent();
-			return (editorComponent != null) ? FlatUIUtils.isPermanentFocusOwner( editorComponent ) : false;
+			return editorComponent != null && FlatUIUtils.isPermanentFocusOwner( editorComponent );
 		} else
 			return FlatUIUtils.isPermanentFocusOwner( comboBox );
 	}
@@ -894,7 +921,7 @@ public class FlatComboBoxUI
 				Component c = renderer.getListCellRendererComponent( list, value, index, isSelected, cellHasFocus );
 				c.applyComponentOrientation( comboBox.getComponentOrientation() );
 
-				paddingBorder.install( c );
+				paddingBorder.install( c, Math.round( FlatUIUtils.getBorderFocusWidth( comboBox ) ) );
 
 				return c;
 			}
@@ -917,6 +944,7 @@ public class FlatComboBoxUI
 		private Insets padding;
 		private JComponent rendererComponent;
 		private Border rendererBorder;
+		private int focusWidth;
 
 		CellPaddingBorder( Insets padding ) {
 			this.padding = padding;
@@ -924,10 +952,12 @@ public class FlatComboBoxUI
 
 		// using synchronized to avoid problems with code that modifies combo box
 		// (model, selection, etc) not on AWT thread (which should be not done)
-		synchronized void install( Component c ) {
+		synchronized void install( Component c, int focusWidth ) {
 			if( !(c instanceof JComponent) )
 				return;
 
+			this.focusWidth = focusWidth;
+
 			JComponent jc = (JComponent) c;
 			Border oldBorder = jc.getBorder();
 			if( oldBorder == this )
@@ -981,6 +1011,12 @@ public class FlatComboBoxUI
 				insets.bottom = padding.bottom;
 				insets.right = padding.right;
 			}
+
+			// if used in popup list, add focus width for exact vertical alignment
+			// of text in popup list with text in combobox
+			insets.left += focusWidth;
+			insets.right += focusWidth;
+
 			return insets;
 		}
 

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

@@ -107,6 +107,12 @@ public class FlatDropShadowBorder
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
 		if( shadowSize <= 0 )

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

@@ -209,6 +209,12 @@ public class FlatEditorPaneUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	private void updateBackground() {
 		FlatTextFieldUI.updateBackground( getComponent(), background,
 			disabledBackground, inactiveBackground,

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

@@ -56,7 +56,7 @@ public class FlatEmptyBorder
 	protected static Insets scaleInsets( Component c, Insets insets,
 		int top, int left, int bottom, int right )
 	{
-		boolean leftToRight = left == right || c.getComponentOrientation().isLeftToRight();
+		boolean leftToRight = left == right || c == null || c.getComponentOrientation().isLeftToRight();
 		insets.left = scale( leftToRight ? left : right );
 		insets.top = scale( top );
 		insets.right = scale( leftToRight ? right : left );
@@ -76,4 +76,9 @@ public class FlatEmptyBorder
 		right = insets.right;
 		return oldInsets;
 	}
+
+	/** @since 2.5 */
+	public Insets getStyleableValue() {
+		return new Insets( top, left, bottom, right );
+	}
 }

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

@@ -19,11 +19,21 @@ package com.formdev.flatlaf.ui;
 import java.awt.BorderLayout;
 import java.awt.Component;
 import java.awt.Dimension;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Image;
 import java.awt.Insets;
+import java.awt.LayoutManager;
+import java.awt.RenderingHints;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
 import java.io.File;
+import java.lang.reflect.Method;
+import java.util.function.Function;
 import javax.swing.AbstractButton;
 import javax.swing.Box;
 import javax.swing.BoxLayout;
+import javax.swing.ButtonGroup;
 import javax.swing.Icon;
 import javax.swing.ImageIcon;
 import javax.swing.JButton;
@@ -34,12 +44,16 @@ import javax.swing.JPanel;
 import javax.swing.JScrollPane;
 import javax.swing.JTable;
 import javax.swing.JToggleButton;
+import javax.swing.JToolBar;
+import javax.swing.SwingConstants;
 import javax.swing.UIManager;
+import javax.swing.filechooser.FileSystemView;
 import javax.swing.filechooser.FileView;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.metal.MetalFileChooserUI;
 import javax.swing.table.TableCellRenderer;
 import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.ScaledImageIcon;
 import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
@@ -133,12 +147,21 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault FileChooser.listViewActionLabelText				String
  * @uiDefault FileChooser.detailsViewActionLabelText			String
  *
+ * <!-- FlatFileChooserUI -->
+ *
+ * @uiDefault FileChooser.shortcuts.buttonSize					Dimension	optional; default is 84,64
+ * @uiDefault FileChooser.shortcuts.iconSize					Dimension	optional; default is 32,32
+ * @uiDefault FileChooser.shortcuts.filesFunction				Function&lt;File[], File[]&gt;
+ * @uiDefault FileChooser.shortcuts.displayNameFunction			Function&lt;File, String&gt;
+ * @uiDefault FileChooser.shortcuts.iconFunction				Function&lt;File, Icon&gt;
+ *
  * @author Karl Tauber
  */
 public class FlatFileChooserUI
 	extends MetalFileChooserUI
 {
 	private final FlatFileView fileView = new FlatFileView();
+	private FlatShortcutsPanel shortcutsPanel;
 
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatFileChooserUI( (JFileChooser) c );
@@ -153,6 +176,25 @@ public class FlatFileChooserUI
 		super.installComponents( fc );
 
 		patchUI( fc );
+
+		if( !UIManager.getBoolean( "FileChooser.noPlacesBar" ) ) { // same as in Windows L&F
+			FlatShortcutsPanel panel = createShortcutsPanel( fc );
+			if( panel.getComponentCount() > 0 ) {
+				shortcutsPanel = panel;
+				fc.add( shortcutsPanel, BorderLayout.LINE_START );
+				fc.addPropertyChangeListener( shortcutsPanel );
+			}
+		}
+	}
+
+	@Override
+	public void uninstallComponents( JFileChooser fc ) {
+		super.uninstallComponents( fc );
+
+		if( shortcutsPanel != null ) {
+			fc.removePropertyChangeListener( shortcutsPanel );
+			shortcutsPanel = null;
+		}
 	}
 
 	private void patchUI( JFileChooser fc ) {
@@ -192,6 +234,25 @@ public class FlatFileChooserUI
 		} catch( ArrayIndexOutOfBoundsException ex ) {
 			// ignore
 		}
+
+		// put north, center and south components into a new panel so that
+		// the shortcuts panel (at west) gets full height
+		LayoutManager layout = fc.getLayout();
+		if( layout instanceof BorderLayout ) {
+			BorderLayout borderLayout = (BorderLayout) layout;
+			borderLayout.setHgap( 8 );
+
+			Component north = borderLayout.getLayoutComponent( BorderLayout.NORTH );
+			Component center = borderLayout.getLayoutComponent( BorderLayout.CENTER );
+			Component south = borderLayout.getLayoutComponent( BorderLayout.SOUTH );
+			if( north != null && center != null && south != null ) {
+				JPanel p = new JPanel( new BorderLayout( 0, 11 ) );
+				p.add( north, BorderLayout.NORTH );
+				p.add( center, BorderLayout.CENTER );
+				p.add( south, BorderLayout.SOUTH );
+				fc.add( p, BorderLayout.CENTER );
+			}
+		}
 	}
 
 	@Override
@@ -250,9 +311,19 @@ public class FlatFileChooserUI
 		return p;
 	}
 
+	/** @since 2.3 */
+	protected FlatShortcutsPanel createShortcutsPanel( JFileChooser fc ) {
+		return new FlatShortcutsPanel( fc );
+	}
+
 	@Override
 	public Dimension getPreferredSize( JComponent c ) {
-		return UIScale.scale( super.getPreferredSize( c ) );
+		Dimension prefSize = super.getPreferredSize( c );
+		Dimension minSize = getMinimumSize( c );
+		int shortcutsPanelWidth = (shortcutsPanel != null) ? shortcutsPanel.getPreferredSize().width : 0;
+		return new Dimension(
+			Math.max( prefSize.width, minSize.width + shortcutsPanelWidth ),
+			Math.max( prefSize.height, minSize.height ) );
 	}
 
 	@Override
@@ -275,7 +346,10 @@ public class FlatFileChooserUI
 
 	private boolean doNotUseSystemIcons() {
 		// Java 17 32bit craches on Windows when using system icons
-		return SystemInfo.isWindows && SystemInfo.isJava_17_orLater && !SystemInfo.isX86_64;
+		// fixed in Java 18+ (see https://bugs.openjdk.java.net/browse/JDK-8277299)
+		return SystemInfo.isWindows &&
+			SystemInfo.isX86 &&
+			(SystemInfo.isJava_17_orLater && !SystemInfo.isJava_18_orLater);
 	}
 
 	//---- class FlatFileView -------------------------------------------------
@@ -313,4 +387,234 @@ public class FlatFileChooserUI
 			return icon;
 		}
 	}
+
+	//---- class FlatShortcutsPanel -------------------------------------------
+
+	/** @since 2.3 */
+	public static class FlatShortcutsPanel
+		extends JToolBar
+		implements PropertyChangeListener
+	{
+		private final JFileChooser fc;
+
+		private final Dimension buttonSize;
+		private final Dimension iconSize;
+		private final Function<File[], File[]> filesFunction;
+		private final Function<File, String> displayNameFunction;
+		private final Function<File, Icon> iconFunction;
+
+		protected final File[] files;
+		protected final JToggleButton[] buttons;
+		protected final ButtonGroup buttonGroup;
+
+		@SuppressWarnings( "unchecked" )
+		public FlatShortcutsPanel( JFileChooser fc ) {
+			super( JToolBar.VERTICAL );
+			this.fc = fc;
+			setFloatable( false );
+
+			buttonSize = UIScale.scale( getUIDimension( "FileChooser.shortcuts.buttonSize", 84, 64 ) );
+			iconSize = getUIDimension( "FileChooser.shortcuts.iconSize", 32, 32 );
+
+			filesFunction = (Function<File[], File[]>) UIManager.get( "FileChooser.shortcuts.filesFunction" );
+			displayNameFunction = (Function<File, String>) UIManager.get( "FileChooser.shortcuts.displayNameFunction" );
+			iconFunction = (Function<File, Icon>) UIManager.get( "FileChooser.shortcuts.iconFunction" );
+
+			FileSystemView fsv = fc.getFileSystemView();
+			File[] files = getChooserShortcutPanelFiles( fsv );
+			if( filesFunction != null )
+				files = filesFunction.apply( files );
+			this.files = files;
+
+			// create toolbar buttons
+			buttons = new JToggleButton[files.length];
+			buttonGroup = new ButtonGroup();
+			for( int i = 0; i < files.length; i++ ) {
+				// wrap drive path
+				if( fsv.isFileSystemRoot( files[i] ) )
+					files[i] = fsv.createFileObject( files[i].getAbsolutePath() );
+
+				File file = files[i];
+				String name = getDisplayName( fsv, file );
+				Icon icon = getIcon( fsv, file );
+
+				// remove path from name
+				int lastSepIndex = name.lastIndexOf( File.separatorChar );
+				if( lastSepIndex >= 0 && lastSepIndex < name.length() - 1 )
+					name = name.substring( lastSepIndex + 1 );
+
+				// scale icon (if necessary)
+				if( icon instanceof ImageIcon )
+					icon = new ScaledImageIcon( (ImageIcon) icon, iconSize.width, iconSize.height );
+				else if( icon != null )
+					icon = new ShortcutIcon( icon, iconSize.width, iconSize.height );
+
+				// create button
+				JToggleButton button = createButton( name, icon );
+				button.addActionListener( e -> {
+					fc.setCurrentDirectory( file );
+				} );
+
+				add( button );
+				buttonGroup.add( button );
+				buttons[i] = button;
+			}
+
+			directoryChanged( fc.getCurrentDirectory() );
+		}
+
+		private Dimension getUIDimension( String key, int defaultWidth, int defaultHeight ) {
+			Dimension size = UIManager.getDimension( key );
+			if( size == null )
+				size = new Dimension( defaultWidth, defaultHeight );
+			return size;
+		}
+
+		protected JToggleButton createButton( String name, Icon icon ) {
+			JToggleButton button = new JToggleButton( name, icon );
+			button.setVerticalTextPosition( SwingConstants.BOTTOM );
+			button.setHorizontalTextPosition( SwingConstants.CENTER );
+			button.setAlignmentX( Component.CENTER_ALIGNMENT );
+			button.setIconTextGap( 0 );
+			button.setPreferredSize( buttonSize );
+			button.setMaximumSize( buttonSize );
+			return button;
+		}
+
+		protected File[] getChooserShortcutPanelFiles( FileSystemView fsv ) {
+			try {
+				if( SystemInfo.isJava_12_orLater ) {
+					Method m = fsv.getClass().getMethod( "getChooserShortcutPanelFiles" );
+					File[] files = (File[]) m.invoke( fsv );
+
+					// on macOS and Linux, files consists only of the user home directory
+					if( files.length == 1 && files[0].equals( new File( System.getProperty( "user.home" ) ) ) )
+						files = new File[0];
+
+					return files;
+				} else if( SystemInfo.isWindows ) {
+					Class<?> cls = Class.forName( "sun.awt.shell.ShellFolder" );
+					Method m = cls.getMethod( "get", String.class );
+					return (File[]) m.invoke( null, "fileChooserShortcutPanelFolders" );
+				}
+			} catch( IllegalAccessException ex ) {
+				// do not log because access may be denied via VM option '--illegal-access=deny'
+			} catch( Exception ex ) {
+				LoggingFacade.INSTANCE.logSevere( null, ex );
+			}
+
+			// fallback
+			return new File[0];
+		}
+
+		protected String getDisplayName( FileSystemView fsv, File file ) {
+			if( displayNameFunction != null ) {
+				String name = displayNameFunction.apply( file );
+				if( name != null )
+					return name;
+			}
+
+			return fsv.getSystemDisplayName( file );
+		}
+
+		protected Icon getIcon( FileSystemView fsv, File file ) {
+			if( iconFunction != null ) {
+				Icon icon = iconFunction.apply( file );
+				if( icon != null )
+					return icon;
+			}
+
+			// Java 17+ supports getting larger system icons
+			try {
+				if( SystemInfo.isJava_17_orLater ) {
+					Method m = fsv.getClass().getMethod( "getSystemIcon", File.class, int.class, int.class );
+					return (Icon) m.invoke( fsv, file, iconSize.width, iconSize.height );
+				} else if( iconSize.width > 16 || iconSize.height > 16 ) {
+					Class<?> cls = Class.forName( "sun.awt.shell.ShellFolder" );
+					if( cls.isInstance( file ) ) {
+						Method m = file.getClass().getMethod( "getIcon", boolean.class );
+						m.setAccessible( true );
+						Image image = (Image) m.invoke( file, true );
+						if( image != null )
+							return new ImageIcon( image );
+					}
+				}
+			} catch( IllegalAccessException ex ) {
+				// do not log because access may be denied via VM option '--illegal-access=deny'
+			} catch( Exception ex ) {
+				LoggingFacade.INSTANCE.logSevere( null, ex );
+			}
+
+			// get system icon in default size 16x16
+			return fsv.getSystemIcon( file );
+		}
+
+		protected void directoryChanged( File file ) {
+			if( file != null ) {
+				String absolutePath = file.getAbsolutePath();
+				for( int i = 0; i < files.length; i++ ) {
+					// also compare path because otherwise selecting "Documents"
+					// in "Look in" combobox would not select "Documents" shortcut item
+					if( files[i].equals( file ) || files[i].getAbsolutePath().equals( absolutePath ) ) {
+						buttons[i].setSelected( true );
+						return;
+					}
+				}
+			}
+
+			buttonGroup.clearSelection();
+		}
+
+		@Override
+		public void propertyChange( PropertyChangeEvent e ) {
+			switch( e.getPropertyName() ) {
+				case JFileChooser.DIRECTORY_CHANGED_PROPERTY:
+					directoryChanged( fc.getCurrentDirectory() );
+					break;
+			}
+		}
+	}
+
+	//---- class ShortcutIcon -------------------------------------------------
+
+	private static class ShortcutIcon
+		implements Icon
+	{
+		private final Icon icon;
+		private final int iconWidth;
+		private final int iconHeight;
+
+		ShortcutIcon( Icon icon, int iconWidth, int iconHeight ) {
+			this.icon = icon;
+			this.iconWidth = iconWidth;
+			this.iconHeight = iconHeight;
+		}
+
+		@Override
+		public void paintIcon( Component c, Graphics g, int x, int y ) {
+			Graphics2D g2 = (Graphics2D) g.create();
+			try {
+				// set rendering hint for the case that the icon is a bitmap (not used for vector icons)
+				g2.setRenderingHint( RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC );
+
+				double scale = (double) getIconWidth() / (double) icon.getIconWidth();
+				g2.translate( x, y );
+				g2.scale( scale, scale );
+
+				icon.paintIcon( c, g2, 0, 0 );
+			} finally {
+				g2.dispose();
+			}
+		}
+
+		@Override
+		public int getIconWidth() {
+			return UIScale.scale( iconWidth );
+		}
+
+		@Override
+		public int getIconHeight() {
+			return UIScale.scale( iconHeight );
+		}
+	}
 }

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

@@ -179,6 +179,12 @@ public class FlatInternalFrameUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this, frame.getBorder() );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, frame.getBorder(), key );
+	}
+
 	@Override
 	public void update( Graphics g, JComponent c ) {
 		// The internal frame actually should be opaque and fill its background,
@@ -253,6 +259,23 @@ public class FlatInternalFrameUI
 			return infos;
 		}
 
+		/** @since 2.5 */
+		@Override
+		public Object getStyleableValue( String key ) {
+			switch( key ) {
+				case "borderMargins": return getStyleableValue();
+
+				case "activeDropShadowColor": return activeDropShadowBorder.getStyleableValue( "shadowColor" );
+				case "activeDropShadowInsets": return activeDropShadowBorder.getStyleableValue( "shadowInsets" );
+				case "activeDropShadowOpacity": return activeDropShadowBorder.getStyleableValue( "shadowOpacity" );
+				case "inactiveDropShadowColor": return inactiveDropShadowBorder.getStyleableValue( "shadowColor" );
+				case "inactiveDropShadowInsets": return inactiveDropShadowBorder.getStyleableValue( "shadowInsets" );
+				case "inactiveDropShadowOpacity": return inactiveDropShadowBorder.getStyleableValue( "shadowOpacity" );
+			}
+
+			return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+		}
+
 		@Override
 		public Insets getBorderInsets( Component c, Insets insets ) {
 			if( c instanceof JInternalFrame && ((JInternalFrame)c).isMaximum() ) {

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

@@ -158,6 +158,12 @@ public class FlatLabelUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	/**
 	 * Checks whether text contains HTML tags that use "absolute-size" keywords
 	 * (e.g. "x-large") for font-size in default style sheet

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

@@ -72,7 +72,7 @@ public class FlatListCellBorder
 	}
 
 	/**
-	 * Because this borders are always shared for all lists,
+	 * Because this border is always shared for all lists,
 	 * get border specific style from FlatListUI.
 	 */
 	static <T> T getStyleFromListUI( Component c, Function<FlatListUI, T> f ) {

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

@@ -90,6 +90,13 @@ public class FlatListUI
 
 	@Override
 	public void installUI( JComponent c ) {
+		if( FlatUIUtils.needsLightAWTPeer( c ) )
+			FlatUIUtils.runWithLightAWTPeerUIDefaults( () -> installUIImpl( c ) );
+		else
+			installUIImpl( c );
+	}
+
+	private void installUIImpl( JComponent c ) {
 		super.installUI( c );
 
 		installStyle();
@@ -209,10 +216,16 @@ public class FlatListUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	/**
 	 * Toggle selection colors from focused to inactive and vice versa.
 	 *
-	 * This is not a optimal solution but much easier than rewriting the whole paint methods.
+	 * This is not an optimal solution but much easier than rewriting the whole paint methods.
 	 *
 	 * Using a LaF specific renderer was avoided because often a custom renderer is
 	 * already used in applications. Then either the inactive colors are not used,

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

@@ -51,6 +51,12 @@ public class FlatMenuBarBorder
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	public void paintBorder( Component c, Graphics g, int x, int y, int width, int height ) {
 		if( !showBottomSeparator( c ) )

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

@@ -18,8 +18,10 @@ package com.formdev.flatlaf.ui;
 
 import java.awt.Color;
 import java.awt.Component;
+import java.awt.Container;
 import java.awt.Graphics;
 import java.awt.Insets;
+import java.awt.LayoutManager;
 import java.awt.Window;
 import java.awt.event.ActionEvent;
 import java.beans.PropertyChangeListener;
@@ -27,6 +29,7 @@ import java.util.Map;
 import java.util.concurrent.atomic.AtomicBoolean;
 import javax.swing.AbstractAction;
 import javax.swing.ActionMap;
+import javax.swing.BoxLayout;
 import javax.swing.JComponent;
 import javax.swing.JMenu;
 import javax.swing.JMenuBar;
@@ -40,11 +43,13 @@ import javax.swing.plaf.ActionMapUIResource;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicMenuBarUI;
+import javax.swing.plaf.basic.DefaultMenuLayout;
 import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.SystemInfo;
+import com.formdev.flatlaf.util.UIScale;
 
 /**
  * Provides the Flat LaF UI delegate for {@link javax.swing.JMenuBar}.
@@ -71,6 +76,8 @@ public class FlatMenuBarUI
 
 	// used in FlatMenuUI
 	/** @since 2 */ @Styleable protected Color hoverBackground;
+	/** @since 2.5 */ @Styleable protected Color selectionBackground;
+	/** @since 2.5 */ @Styleable protected Color selectionForeground;
 	/** @since 2 */ @Styleable protected Color underlineSelectionBackground;
 	/** @since 2 */ @Styleable protected Color underlineSelectionColor;
 	/** @since 2 */ @Styleable protected int underlineSelectionHeight = -1;
@@ -100,6 +107,10 @@ public class FlatMenuBarUI
 		super.installDefaults();
 
 		LookAndFeel.installProperty( menuBar, "opaque", false );
+
+		LayoutManager layout = menuBar.getLayout();
+		if( layout == null || layout instanceof UIResource )
+			menuBar.setLayout( new FlatMenuBarLayout( menuBar ) );
 	}
 
 	@Override
@@ -165,6 +176,12 @@ public class FlatMenuBarUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this, menuBar.getBorder() );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, menuBar.getBorder(), key );
+	}
+
 	@Override
 	public void update( Graphics g, JComponent c ) {
 		// paint background
@@ -210,7 +227,7 @@ public class FlatMenuBarUI
 		// check whether:
 		// - TitlePane.unifiedBackground is true and
 		// - menu bar is the "main" menu bar and
-		// - window has custom decorations enabled
+		// - window root pane has custom decoration style
 
 		JRootPane rootPane;
 		// (not storing value of "TitlePane.unifiedBackground" in class to allow changing at runtime)
@@ -218,7 +235,131 @@ public class FlatMenuBarUI
 			(rootPane = SwingUtilities.getRootPane( c )) != null &&
 			rootPane.getParent() instanceof Window &&
 			rootPane.getJMenuBar() == c &&
-			FlatNativeWindowBorder.hasCustomDecoration( (Window) rootPane.getParent() );
+			rootPane.getWindowDecorationStyle() != JRootPane.NONE;
+	}
+
+	//---- class FlatMenuBarLayout --------------------------------------------
+
+	/**
+	 * @since 2.4
+	 */
+	protected static class FlatMenuBarLayout
+		extends DefaultMenuLayout
+	{
+		public FlatMenuBarLayout( Container target ) {
+			super( target, BoxLayout.LINE_AXIS );
+		}
+
+		@Override
+		public void layoutContainer( Container target ) {
+			super.layoutContainer( target );
+
+
+			// The only purpose of the code below is to make sure that a horizontal glue,
+			// which can be used to move window and displays the window title in embedded menu bar,
+			// is always visible within the menu bar bounds and has a minimum width.
+			// If this is not the case, the horizontal glue is made larger and
+			// components that are on the left side of the glue are made smaller.
+
+
+			// get root pane and check whether this menu bar is the root pane menu bar
+			JRootPane rootPane = SwingUtilities.getRootPane( target );
+			if( rootPane == null || rootPane.getJMenuBar() != target )
+				return;
+
+			// get title pane and check whether menu bar is embedded
+			FlatTitlePane titlePane = FlatRootPaneUI.getTitlePane( rootPane );
+			if( titlePane == null || !titlePane.isMenuBarEmbedded() )
+				return;
+
+			// check whether there is a horizontal glue (used for window title in embedded menu bar)
+			// and check minimum width of horizontal glue
+			Component horizontalGlue = titlePane.findHorizontalGlue( (JMenuBar) target );
+			int minTitleWidth = UIScale.scale( titlePane.titleMinimumWidth );
+			if( horizontalGlue != null && horizontalGlue.getWidth() < minTitleWidth ) {
+				// get index of glue component
+				int glueIndex = -1;
+				Component[] components = target.getComponents();
+				for( int i = components.length - 1; i >= 0; i-- ) {
+					if( components[i] == horizontalGlue ) {
+						glueIndex = i;
+						break;
+					}
+				}
+				if( glueIndex < 0 )
+					return; // should never happen
+
+				if( target.getComponentOrientation().isLeftToRight() ) {
+					// left-to-right
+
+					// make horizontal glue wider (minimum title width)
+					int offset = minTitleWidth - horizontalGlue.getWidth();
+					horizontalGlue.setSize( minTitleWidth, horizontalGlue.getHeight() );
+
+					// check whether glue is fully visible
+					int minGlueX = target.getWidth() - target.getInsets().right - minTitleWidth;
+					if( minGlueX < horizontalGlue.getX() ) {
+						// move glue to the left to make it fully visible
+						offset -= (horizontalGlue.getX() - minGlueX);
+						horizontalGlue.setLocation( minGlueX, horizontalGlue.getY() );
+
+						// shrink and move components that are on the left side of the glue
+						for( int i = glueIndex - 1; i >= 0; i-- ) {
+							Component c = components[i];
+							if( c.getX() > minGlueX ) {
+								// move component and set width to zero
+								c.setBounds( minGlueX, c.getY(), 0, c.getHeight() );
+							} else {
+								// reduce size of component
+								c.setSize( minGlueX - c.getX(), c.getHeight() );
+								break;
+							}
+						}
+					}
+
+					// move components that are on the right side of the glue
+					for( int i = glueIndex + 1; i < components.length; i++ ) {
+						Component c = components[i];
+						c.setLocation( c.getX() + offset, c.getY() );
+					}
+				} else {
+					// right-to-left
+
+					// make horizontal glue wider (minimum title width)
+					int offset = minTitleWidth - horizontalGlue.getWidth();
+					horizontalGlue.setBounds( horizontalGlue.getX() - offset, horizontalGlue.getY(),
+						minTitleWidth, horizontalGlue.getHeight() );
+
+					// check whether glue is fully visible
+					int minGlueX = target.getInsets().left;
+					if( minGlueX > horizontalGlue.getX() ) {
+						// move glue to the right to make it fully visible
+						offset -= (horizontalGlue.getX() - minGlueX);
+						horizontalGlue.setLocation( minGlueX, horizontalGlue.getY() );
+
+						// shrink and move components that are on the right side of the glue
+						int x = horizontalGlue.getX() + horizontalGlue.getWidth();
+						for( int i = glueIndex - 1; i >= 0; i-- ) {
+							Component c = components[i];
+							if( c.getX() + c.getWidth() < x ) {
+								// move component and set width to zero
+								c.setBounds( x, c.getY(), 0, c.getHeight() );
+							} else {
+								// move component and reduce size
+								c.setBounds( x, c.getY(), c.getWidth() - (x - c.getX()), c.getHeight() );
+								break;
+							}
+						}
+					}
+
+					// move components that are on the left side of the glue
+					for( int i = glueIndex + 1; i < components.length; i++ ) {
+						Component c = components[i];
+						c.setLocation( c.getX() - offset, c.getY() );
+					}
+				}
+			}
+		}
 	}
 
 	//---- class TakeFocus ----------------------------------------------------

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

@@ -35,7 +35,7 @@ import javax.swing.plaf.MenuBarUI;
 public class FlatMenuItemBorder
 	extends FlatMarginBorder
 {
-	// only used if parent menubar is not a instance of FlatMenuBarUI
+	// only used if parent menubar is not an instance of FlatMenuBarUI
 	private final Insets menuBarItemMargins = UIManager.getInsets( "MenuBar.itemMargins" );
 
 	@Override

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

@@ -97,6 +97,7 @@ public class FlatMenuItemRenderer
 	@Styleable protected int underlineSelectionHeight = UIManager.getInt( "MenuItem.underlineSelectionHeight" );
 
 	private boolean iconsShared = true;
+	private final Font menuFont = UIManager.getFont( "Menu.font" );
 
 	protected FlatMenuItemRenderer( JMenuItem menuItem, Icon checkIcon, Icon arrowIcon,
 		Font acceleratorFont, String acceleratorDelimiter )
@@ -169,6 +170,19 @@ public class FlatMenuItemRenderer
 		return infos;
 	}
 
+	/** @since 2.5 */
+	public Object getStyleableValue( String key ) {
+		if( key.startsWith( "icon." ) ) {
+			String key2 = key.substring( "icon.".length() );
+			if( checkIcon instanceof FlatCheckBoxMenuItemIcon )
+				return ((FlatCheckBoxMenuItemIcon)checkIcon).getStyleableValue( key2 );
+			if( arrowIcon instanceof FlatMenuArrowIcon )
+				return ((FlatMenuArrowIcon)arrowIcon).getStyleableValue( key2 );
+		}
+
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	protected Dimension getPreferredMenuItemSize() {
 		int width = 0;
 		int height = 0;
@@ -180,7 +194,8 @@ public class FlatMenuItemRenderer
 
 		// layout icon and text
 		SwingUtilities.layoutCompoundLabel( menuItem,
-			menuItem.getFontMetrics( menuItem.getFont() ), menuItem.getText(), getIconForLayout(),
+			menuItem.getFontMetrics( isTopLevelMenu ? getTopLevelFont() : menuItem.getFont() ),
+			menuItem.getText(), getIconForLayout(),
 			menuItem.getVerticalAlignment(), menuItem.getHorizontalAlignment(),
 			menuItem.getVerticalTextPosition(), menuItem.getHorizontalTextPosition(),
 			viewRect, iconRect, textRect, scale( menuItem.getIconTextGap() ) );
@@ -282,7 +297,8 @@ public class FlatMenuItemRenderer
 
 		// layout icon and text
 		SwingUtilities.layoutCompoundLabel( menuItem,
-			menuItem.getFontMetrics( menuItem.getFont() ), menuItem.getText(), getIconForLayout(),
+			menuItem.getFontMetrics( isTopLevelMenu ? getTopLevelFont() : menuItem.getFont() ),
+			menuItem.getText(), getIconForLayout(),
 			menuItem.getVerticalAlignment(), menuItem.getHorizontalAlignment(),
 			menuItem.getVerticalTextPosition(), menuItem.getHorizontalTextPosition(),
 			labelRect, iconRect, textRect, scale( menuItem.getIconTextGap() ) );
@@ -392,9 +408,10 @@ debug*/
 		}
 
 		int mnemonicIndex = FlatLaf.isShowMnemonics() ? menuItem.getDisplayedMnemonicIndex() : -1;
-		Color foreground = (isTopLevelMenu( menuItem ) ? menuItem.getParent() : menuItem).getForeground();
+		boolean isTopLevelMenu = isTopLevelMenu( menuItem );
+		Color foreground = (isTopLevelMenu ? menuItem.getParent() : menuItem).getForeground();
 
-		paintText( g, menuItem, textRect, text, mnemonicIndex, menuItem.getFont(),
+		paintText( g, menuItem, textRect, text, mnemonicIndex, isTopLevelMenu ? getTopLevelFont() : menuItem.getFont(),
 			foreground, isUnderlineSelection() ? foreground : selectionForeground, disabledForeground );
 	}
 
@@ -446,6 +463,19 @@ debug*/
 	protected static void paintHTMLText( Graphics g, JMenuItem menuItem,
 		Rectangle textRect, View htmlView, Color selectionForeground )
 	{
+		// On Windows, using Segoe UI font, Java 15 or older and scaling greater than 1,
+		// the width of the HTML view may be initially too small (because component
+		// is not connected to a GraphicsConfiguration when getPreferredSize() is invoked).
+		// Since Java 16, this seems to be fixed somehow by doing popup menu layout twice.
+		//
+		// If using a too small width for htmlView.paint(), the view would rearrange
+		// its children and wrap them to two lines. To avoid this, use view preferred X span
+		// for painting. Core Lafs actually do the same in class MenuItemLayoutHelper.
+		//
+		// Example HTML text that causes the problem: "<html>some <b>HTML</b> <i>text</i></html>"
+		textRect = new Rectangle( textRect );
+		textRect.width = (int) htmlView.getPreferredSpan( View.X_AXIS );
+
 		if( isArmedOrSelected( menuItem ) && selectionForeground != null )
 			g = new GraphicsProxyWithTextColor( (Graphics2D) g, selectionForeground );
 
@@ -468,6 +498,11 @@ debug*/
 		return "underline".equals( UIManager.getString( "MenuItem.selectionType" ) );
 	}
 
+	private Font getTopLevelFont() {
+		Font font = menuItem.getFont();
+		return (font != menuFont) ? font : menuItem.getParent().getFont();
+	}
+
 	private Icon getIconForPainting() {
 		Icon icon = menuItem.getIcon();
 

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

@@ -16,16 +16,19 @@
 
 package com.formdev.flatlaf.ui;
 
-import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Graphics;
 import java.beans.PropertyChangeListener;
+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;
+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.ui.FlatStylingSupport.UnknownStyleException;
 import com.formdev.flatlaf.util.LoggingFacade;
@@ -58,9 +61,15 @@ import com.formdev.flatlaf.util.LoggingFacade;
  *
  * @author Karl Tauber
  */
+@StyleableField( cls=BasicMenuItemUI.class, key="selectionBackground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="selectionForeground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="disabledForeground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="acceleratorForeground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="acceleratorSelectionForeground" )
+
 public class FlatMenuItemUI
 	extends BasicMenuItemUI
-	implements StyleableUI
+	implements StyleableUI, StyleableLookupProvider
 {
 	private FlatMenuItemRenderer renderer;
 	private Map<String, Object> oldStyleValues;
@@ -119,42 +128,54 @@ public class FlatMenuItemUI
 
 	/** @since 2 */
 	protected Object applyStyleProperty( String key, Object value ) {
+		return applyStyleProperty( menuItem, this, renderer, key, value );
+	}
+
+	static Object applyStyleProperty( JMenuItem menuItem, BasicMenuItemUI ui,
+		FlatMenuItemRenderer renderer, String key, Object value )
+	{
 		try {
 			return renderer.applyStyleProperty( key, value );
 		} catch ( UnknownStyleException ex ) {
 			// ignore
 		}
 
-		Object oldValue;
-		switch( key ) {
-			// BasicMenuItemUI
-			case "selectionBackground": oldValue = selectionBackground; selectionBackground = (Color) value; return oldValue;
-			case "selectionForeground": oldValue = selectionForeground; selectionForeground = (Color) value; return oldValue;
-			case "disabledForeground": oldValue = disabledForeground; disabledForeground = (Color) value; return oldValue;
-			case "acceleratorForeground": oldValue = acceleratorForeground; acceleratorForeground = (Color) value; return oldValue;
-			case "acceleratorSelectionForeground": oldValue = acceleratorSelectionForeground; acceleratorSelectionForeground = (Color) value; return oldValue;
-		}
-
-		return FlatStylingSupport.applyToAnnotatedObjectOrComponent( this, menuItem, key, value );
+		return FlatStylingSupport.applyToAnnotatedObjectOrComponent( ui, menuItem, key, value );
 	}
 
 	/** @since 2 */
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
-		return getStyleableInfos( renderer );
+		return getStyleableInfos( this, renderer );
 	}
 
-	static Map<String, Class<?>> getStyleableInfos( FlatMenuItemRenderer renderer ) {
-		Map<String, Class<?>> infos = new FlatStylingSupport.StyleableInfosMap<>();
-		infos.put( "selectionBackground", Color.class );
-		infos.put( "selectionForeground", Color.class );
-		infos.put( "disabledForeground", Color.class );
-		infos.put( "acceleratorForeground", Color.class );
-		infos.put( "acceleratorSelectionForeground", Color.class );
+	static Map<String, Class<?>> getStyleableInfos( BasicMenuItemUI ui, FlatMenuItemRenderer renderer ) {
+		Map<String, Class<?>> infos = FlatStylingSupport.getAnnotatedStyleableInfos( ui );
 		infos.putAll( renderer.getStyleableInfos() );
 		return infos;
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return getStyleableValue( this, renderer, key );
+	}
+
+	static Object getStyleableValue( BasicMenuItemUI ui, FlatMenuItemRenderer renderer, String key ) {
+		Object value = renderer.getStyleableValue( key );
+		if( value == null )
+			value = FlatStylingSupport.getAnnotatedStyleableValue( ui, key );
+		return value;
+	}
+
+	/** @since 2.5 */
+	@Override
+	public MethodHandles.Lookup getLookupForStyling() {
+		// MethodHandles.lookup() is caller sensitive and must be invoked in this class,
+		// otherwise it is not possible to access protected fields in JRE superclass
+		return MethodHandles.lookup();
+	}
+
 	@Override
 	protected Dimension getPreferredMenuItemSize( JComponent c, Icon checkIcon, Icon arrowIcon, int defaultTextIconGap ) {
 		return renderer.getPreferredMenuItemSize();

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

@@ -20,8 +20,10 @@ import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Font;
 import java.awt.Graphics;
+import java.awt.Rectangle;
 import java.awt.event.MouseEvent;
 import java.beans.PropertyChangeListener;
+import java.lang.invoke.MethodHandles;
 import java.util.Map;
 import java.util.function.Function;
 import javax.swing.ButtonModel;
@@ -35,9 +37,11 @@ import javax.swing.UIManager;
 import javax.swing.event.MouseInputListener;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.MenuBarUI;
+import javax.swing.plaf.basic.BasicMenuItemUI;
 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.ui.FlatStylingSupport.UnknownStyleException;
 import com.formdev.flatlaf.util.LoggingFacade;
 
 /**
@@ -72,15 +76,23 @@ import com.formdev.flatlaf.util.LoggingFacade;
  * <!-- FlatMenuRenderer -->
  *
  * @uiDefault MenuBar.hoverBackground								Color
+ * @uiDefault MenuBar.selectionBackground							Color
+ * @uiDefault MenuBar.selectionForeground							Color
  * @uiDefault MenuBar.underlineSelectionBackground					Color
  * @uiDefault MenuBar.underlineSelectionColor						Color
  * @uiDefault MenuBar.underlineSelectionHeight						int
  *
  * @author Karl Tauber
  */
+@StyleableField( cls=BasicMenuItemUI.class, key="selectionBackground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="selectionForeground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="disabledForeground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="acceleratorForeground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="acceleratorSelectionForeground" )
+
 public class FlatMenuUI
 	extends BasicMenuUI
-	implements StyleableUI
+	implements StyleableUI, StyleableLookupProvider
 {
 	private FlatMenuItemRenderer renderer;
 	private Map<String, Object> oldStyleValues;
@@ -166,29 +178,27 @@ public class FlatMenuUI
 
 	/** @since 2 */
 	protected Object applyStyleProperty( String key, Object value ) {
-		try {
-			return renderer.applyStyleProperty( key, value );
-		} catch ( UnknownStyleException ex ) {
-			// ignore
-		}
-
-		Object oldValue;
-		switch( key ) {
-			// BasicMenuItemUI
-			case "selectionBackground": oldValue = selectionBackground; selectionBackground = (Color) value; return oldValue;
-			case "selectionForeground": oldValue = selectionForeground; selectionForeground = (Color) value; return oldValue;
-			case "disabledForeground": oldValue = disabledForeground; disabledForeground = (Color) value; return oldValue;
-			case "acceleratorForeground": oldValue = acceleratorForeground; acceleratorForeground = (Color) value; return oldValue;
-			case "acceleratorSelectionForeground": oldValue = acceleratorSelectionForeground; acceleratorSelectionForeground = (Color) value; return oldValue;
-		}
-
-		return FlatStylingSupport.applyToAnnotatedObjectOrComponent( this, menuItem, key, value );
+		return FlatMenuItemUI.applyStyleProperty( menuItem, this, renderer, key, value );
 	}
 
 	/** @since 2 */
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
-		return FlatMenuItemUI.getStyleableInfos( renderer );
+		return FlatMenuItemUI.getStyleableInfos( this, renderer );
+	}
+
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatMenuItemUI.getStyleableValue( this, renderer, key );
+	}
+
+	/** @since 2.5 */
+	@Override
+	public MethodHandles.Lookup getLookupForStyling() {
+		// MethodHandles.lookup() is caller sensitive and must be invoked in this class,
+		// otherwise it is not possible to access protected fields in JRE superclass
+		return MethodHandles.lookup();
 	}
 
 	@Override
@@ -216,6 +226,8 @@ public class FlatMenuUI
 		extends FlatMenuItemRenderer
 	{
 		protected Color hoverBackground = UIManager.getColor( "MenuBar.hoverBackground" );
+		protected Color menuBarSelectionBackground = UIManager.getColor( "MenuBar.selectionBackground" );
+		protected Color menuBarSelectionForeground = UIManager.getColor( "MenuBar.selectionForeground" );
 		protected Color menuBarUnderlineSelectionBackground = FlatUIUtils.getUIColor( "MenuBar.underlineSelectionBackground", underlineSelectionBackground );
 		protected Color menuBarUnderlineSelectionColor = FlatUIUtils.getUIColor( "MenuBar.underlineSelectionColor", underlineSelectionColor );
 		protected int menuBarUnderlineSelectionHeight = FlatUIUtils.getUIInt( "MenuBar.underlineSelectionHeight", underlineSelectionHeight );
@@ -231,6 +243,10 @@ public class FlatMenuUI
 			if( ((JMenu)menuItem).isTopLevelMenu() ) {
 				if( isUnderlineSelection() )
 					selectionBackground = getStyleFromMenuBarUI( ui -> ui.underlineSelectionBackground, menuBarUnderlineSelectionBackground );
+				else {
+					selectionBackground = getStyleFromMenuBarUI( ui -> ui.selectionBackground,
+						menuBarSelectionBackground != null ? menuBarSelectionBackground : selectionBackground );
+				}
 
 				ButtonModel model = menuItem.getModel();
 				if( model.isRollover() && !model.isArmed() && !model.isSelected() && model.isEnabled() ) {
@@ -243,6 +259,16 @@ public class FlatMenuUI
 			super.paintBackground( g, selectionBackground );
 		}
 
+		@Override
+		protected void paintText( Graphics g, Rectangle textRect, String text, Color selectionForeground, Color disabledForeground ) {
+			if( ((JMenu)menuItem).isTopLevelMenu() && !isUnderlineSelection() ) {
+				selectionForeground = getStyleFromMenuBarUI( ui -> ui.selectionForeground,
+					menuBarSelectionForeground != null ? menuBarSelectionForeground : selectionForeground );
+			}
+
+			super.paintText( g, textRect, text, selectionForeground, disabledForeground );
+		}
+
 		@Override
 		protected void paintUnderlineSelection( Graphics g, Color underlineSelectionColor, int underlineSelectionHeight ) {
 			if( ((JMenu)menuItem).isTopLevelMenu() ) {

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

@@ -0,0 +1,109 @@
+/*
+ * Copyright 2022 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.io.File;
+import com.formdev.flatlaf.FlatSystemProperties;
+import com.formdev.flatlaf.util.LoggingFacade;
+import com.formdev.flatlaf.util.NativeLibrary;
+import com.formdev.flatlaf.util.SystemInfo;
+
+/**
+ * Helper class to load FlatLaf native library (.dll, .so or .dylib),
+ * if available for current operating system and CPU architecture.
+ *
+ * @author Karl Tauber
+ * @since 2.3
+ */
+class FlatNativeLibrary
+{
+	private static NativeLibrary nativeLibrary;
+
+	/**
+	 * Loads native library (if available) and returns whether loaded successfully.
+	 * Returns {@code false} if no native library is available.
+	 */
+	static synchronized boolean isLoaded() {
+		initialize();
+		return (nativeLibrary != null) ? nativeLibrary.isLoaded() : false;
+	}
+
+	private static void initialize() {
+		if( nativeLibrary != null )
+			return;
+
+		String libraryName;
+		if( SystemInfo.isWindows_10_orLater && (SystemInfo.isX86 || SystemInfo.isX86_64) ) {
+			// Windows: requires Windows 10 (x86 or x86_64)
+
+			libraryName = "flatlaf-windows-x86";
+			if( SystemInfo.isX86_64 )
+				libraryName += "_64";
+
+			// load jawt native library
+			if( !SystemInfo.isJava_9_orLater ) {
+				// In Java 8, load jawt.dll (part of JRE) explicitly because it
+				// is not found when running application with <jdk>/bin/java.exe.
+				// When using <jdk>/jre/bin/java.exe, it is found.
+				// jawt.dll is located in <jdk>/jre/bin/.
+				// Java 9 and later do not have this problem.
+				loadJAWT();
+			}
+		} else if( SystemInfo.isLinux && SystemInfo.isX86_64 ) {
+			// Linux: requires x86_64
+
+			libraryName = "flatlaf-linux-x86_64";
+
+			// Load jawt.so (part of JRE) explicitly because it is not found
+			// in all Java versions/distributions.
+			// E.g. not found in Java 13 and later from openjdk.java.net.
+			// There seems to be also differences between distributions.
+			// E.g. Adoptium Java 17 does not need this, but Java 17 from openjdk.java.net does.
+			loadJAWT();
+		} else
+			return; // no native library available for current OS or CPU architecture
+
+		// load native library
+		nativeLibrary = createNativeLibrary( libraryName );
+	}
+
+	private static NativeLibrary createNativeLibrary( String libraryName ) {
+		String libraryPath = System.getProperty( FlatSystemProperties.NATIVE_LIBRARY_PATH );
+		if( libraryPath != null ) {
+			File libraryFile = new File( libraryPath, System.mapLibraryName( libraryName ) );
+			if( libraryFile.exists() )
+				return new NativeLibrary( libraryFile, true );
+			else
+				LoggingFacade.INSTANCE.logSevere( "Did not find external library " + libraryFile + ", using extracted library instead", null );
+		}
+
+		return new NativeLibrary( "com/formdev/flatlaf/natives/" + libraryName, null, true );
+	}
+
+	private static void loadJAWT() {
+		try {
+			System.loadLibrary( "jawt" );
+		} catch( UnsatisfiedLinkError ex ) {
+			// log error only if native library jawt.dll not already loaded
+			String message = ex.getMessage();
+			if( message == null || !message.contains( "already loaded in another classloader" ) )
+				LoggingFacade.INSTANCE.logSevere( null, ex );
+		} catch( Exception ex ) {
+			LoggingFacade.INSTANCE.logSevere( null, ex );
+		}
+	}
+}

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

@@ -0,0 +1,104 @@
+/*
+ * Copyright 2022 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.Point;
+import java.awt.Toolkit;
+import java.awt.Window;
+import java.awt.event.MouseEvent;
+import java.awt.geom.AffineTransform;
+import javax.swing.JDialog;
+import javax.swing.JFrame;
+
+/**
+ * Native methods for Linux.
+ * <p>
+ * <b>Note</b>: This is private API. Do not use!
+ *
+ * @author Karl Tauber
+ * @since 2.5
+ */
+class FlatNativeLinuxLibrary
+{
+	static boolean isLoaded() {
+		return FlatNativeLibrary.isLoaded();
+	}
+
+	// direction for _NET_WM_MOVERESIZE message
+	// see https://specifications.freedesktop.org/wm-spec/wm-spec-latest.html
+	static final int MOVE = 8;
+
+	private static Boolean isXWindowSystem;
+
+	private static boolean isXWindowSystem() {
+		if( isXWindowSystem == null )
+			isXWindowSystem = Toolkit.getDefaultToolkit().getClass().getName().endsWith( ".XToolkit" );
+		return isXWindowSystem;
+	}
+
+	static boolean isWMUtilsSupported( Window window ) {
+		return hasCustomDecoration( window ) && isXWindowSystem() && isLoaded();
+	}
+
+	static boolean moveOrResizeWindow( Window window, MouseEvent e, int direction ) {
+		Point pt = scale( window, e.getLocationOnScreen() );
+		return xMoveOrResizeWindow( window, pt.x, pt.y, direction );
+
+/*
+		try {
+			Class<?> cls = Class.forName( "com.formdev.flatlaf.natives.jna.linux.X11WmUtils" );
+			java.lang.reflect.Method m = cls.getMethod( "xMoveOrResizeWindow", Window.class, int.class, int.class, int.class );
+			return (Boolean) m.invoke( null, window, pt.x, pt.y, direction );
+		} catch (Exception ex) {
+			ex.printStackTrace();
+			return false;
+		}
+*/
+	}
+
+	static boolean showWindowMenu( Window window, MouseEvent e ) {
+		Point pt = scale( window, e.getLocationOnScreen() );
+		return xShowWindowMenu( window, pt.x, pt.y );
+
+/*
+		try {
+			Class<?> cls = Class.forName( "com.formdev.flatlaf.natives.jna.linux.X11WmUtils" );
+			java.lang.reflect.Method m = cls.getMethod( "xShowWindowMenu", Window.class, int.class, int.class );
+			return (Boolean) m.invoke( null, window, pt.x, pt.y );
+		} catch (Exception ex) {
+			ex.printStackTrace();
+			return false;
+		}
+*/
+	}
+
+	private static Point scale( Window window, Point pt ) {
+		AffineTransform transform = window.getGraphicsConfiguration().getDefaultTransform();
+		int x = (int) Math.round( pt.x * transform.getScaleX() );
+		int y = (int) Math.round( pt.y * transform.getScaleY() );
+		return new Point( x, y );
+	}
+
+	// X Window System
+	private static native boolean xMoveOrResizeWindow( Window window, int x, int y, int direction );
+	private static native boolean xShowWindowMenu( Window window, int x, int y );
+
+	private static boolean hasCustomDecoration( Window window ) {
+		return (window instanceof JFrame && JFrame.isDefaultLookAndFeelDecorated() && ((JFrame)window).isUndecorated()) ||
+			(window instanceof JDialog && JDialog.isDefaultLookAndFeelDecorated() && ((JDialog)window).isUndecorated());
+	}
+}

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

@@ -42,11 +42,13 @@ import com.formdev.flatlaf.util.SystemInfo;
 public class FlatNativeWindowBorder
 {
 	// can use window decorations if:
-	// - on Windows 10
+	// - on Windows 10 or later
+	// - not if system property "sun.java2d.opengl" is true on Windows 10
 	// - not when running in JetBrains Projector, Webswing or WinPE
 	// - not disabled via system property
 	private static final boolean canUseWindowDecorations =
 		SystemInfo.isWindows_10_orLater &&
+		(SystemInfo.isWindows_11_orLater || !FlatSystemProperties.getBoolean( "sun.java2d.opengl", false )) &&
 		!SystemInfo.isProjector &&
 		!SystemInfo.isWebswing &&
 		!SystemInfo.isWinPE &&
@@ -56,7 +58,7 @@ public class FlatNativeWindowBorder
 	private static final boolean canUseJBRCustomDecorations =
 		canUseWindowDecorations &&
 		SystemInfo.isJetBrainsJVM_11_orLater &&
-		FlatSystemProperties.getBoolean( FlatSystemProperties.USE_JETBRAINS_CUSTOM_DECORATIONS, true );
+		FlatSystemProperties.getBoolean( FlatSystemProperties.USE_JETBRAINS_CUSTOM_DECORATIONS, false );
 
 	private static Boolean supported;
 	private static Provider nativeProvider;
@@ -313,6 +315,10 @@ public class FlatNativeWindowBorder
 
 	//---- class WindowTopBorder -------------------------------------------
 
+	/**
+	 * Window top border used on Windows 10.
+	 * No longer needed since Windows 11.
+	 */
 	static class WindowTopBorder
 		extends JBRCustomDecorations.JBRWindowTopBorder
 	{

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

@@ -36,6 +36,7 @@ import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicHTML;
 import javax.swing.plaf.basic.BasicOptionPaneUI;
 import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.util.SwingUtils;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -156,7 +157,7 @@ public class FlatOptionPaneUI
 
 		// set icon-message gap
 		if( iconMessageGap > 0 ) {
-			Component iconMessageSeparator = findByName( messageArea, "OptionPane.separator" );
+			Component iconMessageSeparator = SwingUtils.getComponentByName( messageArea, "OptionPane.separator" );
 			if( iconMessageSeparator != null )
 				iconMessageSeparator.setPreferredSize( new Dimension( UIScale.scale( iconMessageGap ), 1 ) );
 		}
@@ -236,20 +237,6 @@ public class FlatOptionPaneUI
 		}
 	}
 
-	private Component findByName( Container c, String name ) {
-		for( Component child : c.getComponents() ) {
-			if( name.equals( child.getName() ) )
-				return child;
-
-			if( child instanceof Container ) {
-				Component c2 = findByName( (Container) child, name );
-				if( c2 != null )
-					return c2;
-			}
-		}
-		return null;
-	}
-
 	@Override
 	protected boolean getSizeButtonsToSameWidth() {
 		return sameSizeButtons;

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

@@ -18,12 +18,14 @@ package com.formdev.flatlaf.ui;
 
 import java.awt.Graphics;
 import java.awt.Graphics2D;
+import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.util.Map;
 import javax.swing.JComponent;
 import javax.swing.JPanel;
 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.LoggingFacade;
@@ -43,13 +45,12 @@ import com.formdev.flatlaf.util.UIScale;
  */
 public class FlatPanelUI
 	extends BasicPanelUI
-	implements StyleableUI
+	implements StyleableUI, PropertyChangeListener
 {
 	// only used via styling (not in UI defaults)
 	/** @since 2 */ @Styleable protected int arc = -1;
 
 	private final boolean shared;
-	private PropertyChangeListener propertyChangeListener;
 	private Map<String, Object> oldStyleValues;
 
 	public static ComponentUI createUI( JComponent c ) {
@@ -67,9 +68,7 @@ public class FlatPanelUI
 	public void installUI( JComponent c ) {
 		super.installUI( c );
 
-		propertyChangeListener = FlatStylingSupport.createPropertyChangeListener(
-			c, () -> stylePropertyChange( (JPanel) c ), null );
-		c.addPropertyChangeListener( propertyChangeListener );
+		c.addPropertyChangeListener( this );
 
 		installStyle( (JPanel) c );
 	}
@@ -78,21 +77,28 @@ public class FlatPanelUI
 	public void uninstallUI( JComponent c ) {
 		super.uninstallUI( c );
 
-		c.removePropertyChangeListener( propertyChangeListener );
-		propertyChangeListener = null;
+		c.removePropertyChangeListener( this );
 
 		oldStyleValues = null;
 	}
 
-	private void stylePropertyChange( JPanel c ) {
-		if( shared && FlatStylingSupport.hasStyleProperty( c ) ) {
-			// unshare component UI if necessary
-			// updateUI() invokes installStyle() from installUI()
-			c.updateUI();
-		} else
-			installStyle( c );
-		c.revalidate();
-		c.repaint();
+	/** @since 2.0.1 */
+	@Override
+	public void propertyChange( PropertyChangeEvent e ) {
+		switch( e.getPropertyName() ) {
+			case FlatClientProperties.STYLE:
+			case FlatClientProperties.STYLE_CLASS:
+				JPanel c = (JPanel) e.getSource();
+				if( shared && FlatStylingSupport.hasStyleProperty( c ) ) {
+					// unshare component UI if necessary
+					// updateUI() invokes installStyle() from installUI()
+					c.updateUI();
+				} else
+					installStyle( c );
+				c.revalidate();
+				c.repaint();
+				break;
+		}
 	}
 
 	/** @since 2 */
@@ -121,6 +127,12 @@ public class FlatPanelUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	public void update( Graphics g, JComponent c ) {
 		// fill background

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

@@ -23,11 +23,13 @@ import java.awt.Toolkit;
 import java.awt.event.KeyAdapter;
 import java.awt.event.KeyEvent;
 import java.awt.event.KeyListener;
+import java.beans.PropertyChangeEvent;
 import java.util.Map;
 import javax.swing.Action;
 import javax.swing.ActionMap;
 import javax.swing.Icon;
 import javax.swing.JComponent;
+import javax.swing.JPasswordField;
 import javax.swing.JToggleButton;
 import javax.swing.LookAndFeel;
 import javax.swing.SwingUtilities;
@@ -38,6 +40,7 @@ import javax.swing.text.Element;
 import javax.swing.text.JTextComponent;
 import javax.swing.text.PasswordView;
 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.UIScale;
@@ -83,6 +86,9 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatPasswordFieldUI
 	extends FlatTextFieldUI
 {
+	// used to preserve reveal button state when switching theme
+	private static final String KEY_REVEAL_SELECTED = "FlatLaf.internal.FlatPasswordFieldUI.revealSelected";
+
 	private Character echoChar;
 
 	@Styleable protected boolean showCapsLock;
@@ -93,6 +99,7 @@ public class FlatPasswordFieldUI
 	private KeyListener capsLockListener;
 	private boolean capsLockIconShared = true;
 	private JToggleButton revealButton;
+	private boolean uninstallEchoChar;
 
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatPasswordFieldUI();
@@ -227,6 +234,14 @@ public class FlatPasswordFieldUI
 		return infos;
 	}
 
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		if( key.equals( "capsLockIconColor" ) && capsLockIcon instanceof FlatCapsLockIcon )
+			return ((FlatCapsLockIcon)capsLockIcon).getStyleableValue( key );
+
+		return super.getStyleableValue( c, key );
+	}
+
 	@Override
 	public View create( Element elem ) {
 		return new PasswordView( elem );
@@ -269,36 +284,102 @@ public class FlatPasswordFieldUI
 		if( !showCapsLock )
 			return false;
 
-		JTextComponent c = getComponent();
-		return FlatUIUtils.isPermanentFocusOwner( c ) &&
+		return FlatUIUtils.isPermanentFocusOwner( getComponent() ) &&
 			Toolkit.getDefaultToolkit().getLockingKeyState( KeyEvent.VK_CAPS_LOCK );
 	}
 
 	/** @since 2 */
 	protected void installRevealButton() {
-		JTextComponent c = getComponent();
 		if( showRevealButton ) {
 			revealButton = createRevealButton();
+			updateRevealButton();
 			installLayout();
-			c.add( revealButton );
+			getComponent().add( revealButton );
 		}
 	}
 
 	/** @since 2 */
 	protected JToggleButton createRevealButton() {
-		JToggleButton button = new JToggleButton( revealIcon );
+		JPasswordField c = (JPasswordField) getComponent();
+		JToggleButton button = new JToggleButton( revealIcon, !c.echoCharIsSet() );
+		button.setName( "PasswordField.revealButton" );
 		prepareLeadingOrTrailingComponent( button );
+		button.putClientProperty( FlatClientProperties.STYLE_CLASS, "inTextField revealButton" );
+		if( FlatClientProperties.clientPropertyBoolean( c, KEY_REVEAL_SELECTED, false ) ) {
+			button.setSelected( true );
+			updateEchoChar( true );
+		}
 		button.addActionListener( e -> {
-			LookAndFeel.installProperty( getComponent(), "echoChar", button.isSelected()
-				? '\0'
-				: (echoChar != null ? echoChar : '*'));
+			boolean selected = button.isSelected();
+			updateEchoChar( selected );
+			c.putClientProperty( KEY_REVEAL_SELECTED, selected );
 		} );
 		return button;
 	}
 
+	/** @since 2.5 */
+	protected void updateRevealButton() {
+		if( revealButton == null )
+			return;
+
+		JTextComponent c = getComponent();
+		boolean visible = c.isEnabled();
+		if( visible != revealButton.isVisible() ) {
+			revealButton.setVisible( visible );
+			c.revalidate();
+			c.repaint();
+
+			if( !visible ) {
+				revealButton.setSelected( false );
+				updateEchoChar( false );
+				getComponent().putClientProperty( KEY_REVEAL_SELECTED, null );
+			}
+		}
+	}
+
+	@Override
+	protected void propertyChange( PropertyChangeEvent e ) {
+		super.propertyChange( e );
+
+		switch( e.getPropertyName() ) {
+			case "enabled":
+				updateRevealButton();
+				break;
+		}
+	}
+
+	private void updateEchoChar( boolean selected ) {
+		char newEchoChar = selected
+			? 0
+			: (echoChar != null ? echoChar : '*');
+
+		JPasswordField c = (JPasswordField) getComponent();
+		if( newEchoChar == c.getEchoChar() )
+			return;
+
+		// set echo char
+		LookAndFeel.installProperty( c, "echoChar", newEchoChar );
+
+		// check whether was able to set echo char via LookAndFeel.installProperty()
+		// if not, then echo char was explicitly changed via JPasswordField.setEchoChar()
+		char actualEchoChar = c.getEchoChar();
+		if( actualEchoChar != newEchoChar ) {
+			if( selected && actualEchoChar != 0 ) {
+				// use explicitly set echo char
+				echoChar = actualEchoChar;
+				uninstallEchoChar = true;
+			}
+
+			c.setEchoChar( newEchoChar );
+		}
+	}
+
 	/** @since 2 */
 	protected void uninstallRevealButton() {
 		if( revealButton != null ) {
+			if( uninstallEchoChar && revealButton.isSelected() )
+				((JPasswordField)getComponent()).setEchoChar( echoChar );
+
 			getComponent().remove( revealButton );
 			revealButton = null;
 		}

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

@@ -16,10 +16,12 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.AWTEvent;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Container;
 import java.awt.Dimension;
+import java.awt.EventQueue;
 import java.awt.GraphicsConfiguration;
 import java.awt.GraphicsDevice;
 import java.awt.GraphicsEnvironment;
@@ -33,7 +35,10 @@ import java.awt.Toolkit;
 import java.awt.Window;
 import java.awt.event.ComponentEvent;
 import java.awt.event.ComponentListener;
-import java.lang.reflect.InvocationTargetException;
+import java.awt.event.MouseEvent;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
 import java.lang.reflect.Method;
 import javax.swing.JComponent;
 import javax.swing.JLayeredPane;
@@ -61,8 +66,8 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatPopupFactory
 	extends PopupFactory
 {
-	private Method java8getPopupMethod;
-	private Method java9getPopupMethod;
+	private MethodHandle java8getPopupMethod;
+	private MethodHandle java9getPopupMethod;
 
 	@Override
 	public Popup getPopup( Component owner, Component contents, int x, int y )
@@ -140,7 +145,7 @@ public class FlatPopupFactory
 	 * <p>
 	 * On a dual screen setup, where screens use different scale factors, it may happen
 	 * that the window location changes when showing a heavy weight popup window.
-	 * E.g. when opening an dialog on the secondary screen and making combobox popup visible.
+	 * E.g. when opening a dialog on the secondary screen and making combobox popup visible.
 	 * <p>
 	 * This is a workaround for https://bugs.openjdk.java.net/browse/JDK-8224608
 	 */
@@ -189,23 +194,25 @@ public class FlatPopupFactory
 	{
 		try {
 			if( SystemInfo.isJava_9_orLater ) {
+				// Java 9: protected Popup getPopup( Component owner, Component contents, int x, int y, boolean isHeavyWeightPopup )
 				if( java9getPopupMethod == null ) {
-					java9getPopupMethod = PopupFactory.class.getDeclaredMethod(
-						"getPopup", Component.class, Component.class, int.class, int.class, boolean.class );
+					MethodType mt = MethodType.methodType( Popup.class, Component.class, Component.class, int.class, int.class, boolean.class );
+					java9getPopupMethod = MethodHandles.lookup().findVirtual( PopupFactory.class, "getPopup", mt );
 				}
 				return (Popup) java9getPopupMethod.invoke( this, owner, contents, x, y, true );
 			} else {
-				// Java 8
+				// Java 8: private Popup getPopup( Component owner, Component contents, int ownerX, int ownerY, int popupType )
 				if( java8getPopupMethod == null ) {
-					java8getPopupMethod = PopupFactory.class.getDeclaredMethod(
+					Method m = PopupFactory.class.getDeclaredMethod(
 						"getPopup", Component.class, Component.class, int.class, int.class, int.class );
-					java8getPopupMethod.setAccessible( true );
+					m.setAccessible( true );
+					java8getPopupMethod = MethodHandles.lookup().unreflect( m );
 				}
 				return (Popup) java8getPopupMethod.invoke( this, owner, contents, x, y, /*HEAVY_WEIGHT_POPUP*/ 2 );
 			}
-		} catch( NoSuchMethodException | SecurityException | IllegalAccessException | InvocationTargetException ex ) {
-			// ignore
-			return null;
+		} catch( Throwable ex ) {
+			// fallback
+			return super.getPopup( owner, contents, x, y );
 		}
 	}
 
@@ -219,7 +226,7 @@ public class FlatPopupFactory
 	 * and corrects the y-location so that the tooltip is placed above the mouse location.
 	 */
 	private Point fixToolTipLocation( Component owner, Component contents, int x, int y ) {
-		if( !(contents instanceof JToolTip) || !wasInvokedFromToolTipManager() )
+		if( !(contents instanceof JToolTip) || !wasInvokedFromToolTipManager() || hasTipLocation( owner ) )
 			return null;
 
 		PointerInfo pointerInfo = MouseInfo.getPointerInfo();
@@ -264,6 +271,35 @@ public class FlatPopupFactory
 		return StackUtils.wasInvokedFrom( ToolTipManager.class.getName(), "showTipWindow", 8 );
 	}
 
+	/**
+	 * Checks whether the owner component returns a tooltip location in
+	 * JComponent.getToolTipLocation(MouseEvent).
+	 */
+	private boolean hasTipLocation( Component owner ) {
+		if( !(owner instanceof JComponent) )
+			return false;
+
+		AWTEvent e = EventQueue.getCurrentEvent();
+		MouseEvent me;
+		if( e instanceof MouseEvent )
+			me = (MouseEvent) e;
+		else {
+			// no mouse event available because a timer is used to show the tooltip
+			// --> create mouse event from current mouse location
+			PointerInfo pointerInfo = MouseInfo.getPointerInfo();
+			if( pointerInfo == null )
+				return false;
+
+			Point location = new Point( pointerInfo.getLocation());
+			SwingUtilities.convertPointFromScreen( location, owner );
+			me = new MouseEvent( owner, MouseEvent.MOUSE_MOVED, System.currentTimeMillis(),
+				0, location.x, location.y, 0, false );
+		}
+
+		return me.getSource() == owner &&
+			((JComponent)owner).getToolTipLocation( me ) != null;
+	}
+
 	//---- class NonFlashingPopup ---------------------------------------------
 
 	private class NonFlashingPopup

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

@@ -66,6 +66,16 @@ public class FlatPopupMenuBorder
 		return infos;
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( String key ) {
+		switch( key ) {
+			case "borderInsets": return getStyleableValue();
+			case "borderColor": return borderColor;
+		}
+		return null;
+	}
+
 	@Override
 	public Color getLineColor() {
 		return (borderColor != null) ? borderColor : super.getLineColor();

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

@@ -16,18 +16,58 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.Component;
 import java.awt.Container;
 import java.awt.Dimension;
+import java.awt.EventQueue;
+import java.awt.Graphics;
+import java.awt.GraphicsConfiguration;
+import java.awt.GraphicsDevice;
+import java.awt.GraphicsEnvironment;
+import java.awt.Insets;
 import java.awt.LayoutManager;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.Toolkit;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import java.awt.event.MouseWheelEvent;
+import java.awt.event.MouseWheelListener;
 import java.beans.PropertyChangeListener;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicBoolean;
 import javax.swing.BoxLayout;
+import javax.swing.JButton;
 import javax.swing.JComponent;
+import javax.swing.JMenuItem;
+import javax.swing.JPanel;
+import javax.swing.JPopupMenu;
+import javax.swing.JScrollPane;
+import javax.swing.JViewport;
+import javax.swing.MenuElement;
+import javax.swing.MenuSelectionManager;
+import javax.swing.Popup;
+import javax.swing.PopupFactory;
+import javax.swing.SwingConstants;
+import javax.swing.SwingUtilities;
+import javax.swing.Timer;
+import javax.swing.UIManager;
+import javax.swing.event.MenuKeyEvent;
+import javax.swing.event.MenuKeyListener;
+import javax.swing.event.PopupMenuEvent;
+import javax.swing.event.PopupMenuListener;
+import javax.swing.plaf.ButtonUI;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
+import javax.swing.plaf.basic.BasicComboPopup;
+import javax.swing.plaf.basic.BasicMenuItemUI;
 import javax.swing.plaf.basic.BasicPopupMenuUI;
 import javax.swing.plaf.basic.DefaultMenuLayout;
+import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.util.LoggingFacade;
 
@@ -41,12 +81,22 @@ import com.formdev.flatlaf.util.LoggingFacade;
  * @uiDefault PopupMenu.foreground						Color
  * @uiDefault PopupMenu.border							Border
  *
+ * <!-- FlatPopupMenuUI -->
+ *
+ * @uiDefault Component.arrowType					String	chevron (default) or triangle
+ * @uiDefault PopupMenu.scrollArrowColor			Color
+ * @uiDefault PopupMenu.hoverScrollArrowBackground	Color	optional
+ *
  * @author Karl Tauber
  */
 public class FlatPopupMenuUI
 	extends BasicPopupMenuUI
 	implements StyleableUI
 {
+	/** @since 2.1 */ @Styleable protected String arrowType;
+	/** @since 2.1 */ @Styleable protected Color scrollArrowColor;
+	/** @since 2.1 */ @Styleable protected Color hoverScrollArrowBackground;
+
 	private PropertyChangeListener propertyChangeListener;
 	private Map<String, Object> oldStyleValues;
 	private AtomicBoolean borderShared;
@@ -74,9 +124,21 @@ public class FlatPopupMenuUI
 	public void installDefaults() {
 		super.installDefaults();
 
+		arrowType = UIManager.getString( "Component.arrowType" );
+		scrollArrowColor = UIManager.getColor( "PopupMenu.scrollArrowColor" );
+		hoverScrollArrowBackground = UIManager.getColor( "PopupMenu.hoverScrollArrowBackground" );
+
 		LayoutManager layout = popupMenu.getLayout();
 		if( layout == null || layout instanceof UIResource )
-			popupMenu.setLayout( new FlatMenuLayout( popupMenu, BoxLayout.Y_AXIS ) );
+			popupMenu.setLayout( new FlatPopupMenuLayout( popupMenu, BoxLayout.Y_AXIS ) );
+	}
+
+	@Override
+	protected void uninstallDefaults() {
+		super.uninstallDefaults();
+
+		scrollArrowColor = null;
+		hoverScrollArrowBackground = null;
 	}
 
 	@Override
@@ -122,12 +184,67 @@ public class FlatPopupMenuUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this, popupMenu.getBorder() );
 	}
 
-	//---- class FlatMenuLayout -----------------------------------------------
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, popupMenu.getBorder(), key );
+	}
 
-	protected static class FlatMenuLayout
+	@Override
+	public Popup getPopup( JPopupMenu popup, int x, int y ) {
+		// do not add scroller to combobox popups or to popups that already have a scroll pane
+		if( popup instanceof BasicComboPopup ||
+			(popup.getComponentCount() > 0 && popup.getComponent( 0 ) instanceof JScrollPane) )
+		  return super.getPopup( popup, x, y );
+
+		// do not add scroller if popup fits into screen
+		Dimension prefSize = popup.getPreferredSize();
+		int screenHeight = getScreenHeightAt( x, y );
+		if( prefSize.height <= screenHeight )
+			return super.getPopup( popup, x, y );
+
+		// create scroller
+		FlatPopupScroller scroller = new FlatPopupScroller( popup );
+		scroller.setPreferredSize( new Dimension( prefSize.width, screenHeight ) );
+
+		// create popup
+		PopupFactory popupFactory = PopupFactory.getSharedInstance();
+		return popupFactory.getPopup( popup.getInvoker(), scroller, x, y );
+	}
+
+	private int getScreenHeightAt( int x, int y ) {
+		// find GraphicsConfiguration at popup location (similar to JPopupMenu.getCurrentGraphicsConfiguration())
+		GraphicsConfiguration gc = null;
+		for( GraphicsDevice device : GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices() ) {
+			if( device.getType() == GraphicsDevice.TYPE_RASTER_SCREEN ) {
+				GraphicsConfiguration dgc = device.getDefaultConfiguration();
+				if( dgc.getBounds().contains( x, y ) ) {
+					gc = dgc;
+					break;
+				}
+			}
+		}
+		if( gc == null && popupMenu.getInvoker() != null )
+			gc = popupMenu.getInvoker().getGraphicsConfiguration();
+
+		// compute screen height
+		// (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 != null) ? gc.getBounds() : new Rectangle( toolkit.getScreenSize() );
+		Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets( gc );
+		return screenBounds.height - screenInsets.top - screenInsets.bottom;
+	}
+
+	//---- class FlatPopupMenuLayout ------------------------------------------
+
+	/**
+	 * @since 2.4
+	 */
+	protected static class FlatPopupMenuLayout
 		extends DefaultMenuLayout
 	{
-		public FlatMenuLayout( Container target, int axis ) {
+		public FlatPopupMenuLayout( Container target, int axis ) {
 			super( target, axis );
 		}
 
@@ -138,4 +255,206 @@ public class FlatPopupMenuUI
 			return super.preferredLayoutSize( target );
 		}
 	}
+
+	//---- class FlatPopupScroller --------------------------------------------
+
+	private class FlatPopupScroller
+		extends JPanel
+		implements MouseWheelListener, PopupMenuListener, MenuKeyListener
+	{
+		private final JPopupMenu popup;
+
+		private final JScrollPane scrollPane;
+		private final JButton scrollUpButton;
+		private final JButton scrollDownButton;
+		private int unitIncrement;
+
+		FlatPopupScroller( JPopupMenu popup ) {
+			super( new BorderLayout() );
+			this.popup = popup;
+
+			// this panel is required to avoid that JPopupMenu.setLocation() will be invoked
+			// while scrolling, because this would call JPopupMenu.showPopup()
+			JPanel view = new JPanel( new BorderLayout() );
+			view.add( popup, BorderLayout.CENTER );
+
+			scrollPane = new JScrollPane( view, JScrollPane.VERTICAL_SCROLLBAR_NEVER, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER );
+			scrollPane.setBorder( null );
+
+			scrollUpButton = new ArrowButton( SwingConstants.NORTH );
+			scrollDownButton = new ArrowButton( SwingConstants.SOUTH );
+
+			add( scrollPane, BorderLayout.CENTER );
+			add( scrollUpButton, BorderLayout.NORTH );
+			add( scrollDownButton, BorderLayout.SOUTH );
+
+			setBackground( popup.getBackground() );
+			setBorder( popup.getBorder() );
+			popup.setBorder( null );
+
+			popup.addPopupMenuListener( this );
+			popup.addMouseWheelListener( this );
+			popup.addMenuKeyListener( this );
+
+			updateArrowButtons();
+		}
+
+		void scroll( int unitsToScroll ) {
+			if( unitIncrement == 0 )
+				unitIncrement = new JMenuItem( "X" ).getPreferredSize().height;
+
+			JViewport viewport = scrollPane.getViewport();
+			Point viewPosition = viewport.getViewPosition();
+			int newY = viewPosition.y + (unitIncrement * unitsToScroll);
+			if( newY < 0 )
+				newY = 0;
+			else
+				newY = Math.min( newY, viewport.getViewSize().height - viewport.getExtentSize().height );
+			viewport.setViewPosition( new Point( viewPosition.x, newY ) );
+
+			updateArrowButtons();
+		}
+
+		void updateArrowButtons() {
+			JViewport viewport = scrollPane.getViewport();
+			Point viewPosition = viewport.getViewPosition();
+
+			scrollUpButton.setVisible( viewPosition.y > 0 );
+			scrollDownButton.setVisible( viewPosition.y < viewport.getViewSize().height - viewport.getExtentSize().height );
+		}
+
+		//---- interface PopupMenuListener ----
+
+		@Override
+		public void popupMenuWillBecomeInvisible( PopupMenuEvent e ) {
+			// restore popup border
+			popup.setBorder( getBorder() );
+
+			popup.removePopupMenuListener( this );
+			popup.removeMouseWheelListener( this );
+			popup.removeMenuKeyListener( this );
+		}
+
+		@Override public void popupMenuWillBecomeVisible( PopupMenuEvent e ) {}
+		@Override public void popupMenuCanceled( PopupMenuEvent e ) {}
+
+		//---- interface MouseWheelListener ----
+
+		/**
+		 * Scroll when user rotates mouse wheel.
+		 */
+		@Override
+		public void mouseWheelMoved( MouseWheelEvent e ) {
+			// convert mouse location before scrolling
+			Point mouseLocation = SwingUtilities.convertPoint( (Component) e.getSource(), e.getPoint(), this );
+
+			// scroll
+			scroll( e.getUnitsToScroll() );
+
+			// select menu item at mouse location
+			Component c = SwingUtilities.getDeepestComponentAt( this, mouseLocation.x, mouseLocation.y );
+			if( c instanceof JMenuItem ) {
+				ButtonUI ui = ((JMenuItem)c).getUI();
+				if( ui instanceof BasicMenuItemUI )
+					MenuSelectionManager.defaultManager().setSelectedPath( ((BasicMenuItemUI)ui).getPath() );
+			}
+
+			// this avoids that the popup is closed when running on Java 8
+			// https://bugs.openjdk.java.net/browse/JDK-8075063
+			e.consume();
+		}
+
+		//---- interface MenuKeyListener ----
+
+		/**
+		 * Scroll when user presses Up or Down keys.
+		 */
+		@Override
+		public void menuKeyPressed( MenuKeyEvent e ) {
+			// use invokeLater() because menu selection is not yet updated because
+			// this listener is invoked before another listener that updates the menu selection
+			EventQueue.invokeLater( () -> {
+				if( !isDisplayable() )
+					return;
+
+				MenuElement[] path = MenuSelectionManager.defaultManager().getSelectedPath();
+				if( path.length == 0 )
+					return;
+
+				// scroll selected menu item to visible area
+				Component c = path[path.length - 1].getComponent();
+				JViewport viewport = scrollPane.getViewport();
+				Point pt = SwingUtilities.convertPoint( c, 0, 0, viewport );
+				viewport.scrollRectToVisible( new Rectangle( pt, c.getSize() ) );
+
+				// update arrow buttons
+				boolean upVisible = scrollUpButton.isVisible();
+				updateArrowButtons();
+				if( !upVisible && scrollUpButton.isVisible() ) {
+					// if "up" button becomes visible, make sure that bottom menu item stays visible
+					Point viewPosition = viewport.getViewPosition();
+					int newY = viewPosition.y + scrollUpButton.getPreferredSize().height;
+					viewport.setViewPosition( new Point( viewPosition.x, newY ) );
+				}
+			} );
+		}
+
+		@Override public void menuKeyTyped( MenuKeyEvent e ) {}
+		@Override public void menuKeyReleased( MenuKeyEvent e ) {}
+
+		//---- class ArrowButton ----------------------------------------------
+
+		private class ArrowButton
+			extends FlatArrowButton
+			implements MouseListener, ActionListener
+		{
+			private Timer timer;
+
+			ArrowButton( int direction ) {
+				super( direction, arrowType, scrollArrowColor, null, null, hoverScrollArrowBackground, null, null );
+
+				addMouseListener( this );
+			}
+
+			@Override
+			public void paint( Graphics g ) {
+				// always fill background to paint over border on HiDPI screens
+				g.setColor( popup.getBackground() );
+				g.fillRect( 0, 0, getWidth(), getHeight() );
+
+				super.paint( g );
+			}
+
+			//---- interface MouseListener ----
+
+			@Override public void mouseClicked( MouseEvent e ) {}
+			@Override public void mousePressed( MouseEvent e ) {}
+			@Override public void mouseReleased( MouseEvent e ) {}
+
+			@Override
+			public void mouseEntered( MouseEvent e ) {
+				if( timer == null )
+					timer = new Timer( 50, this );
+				timer.start();
+			}
+
+			@Override
+			public void mouseExited( MouseEvent e ) {
+				if( timer != null )
+					timer.stop();
+			}
+
+			//---- interface ActionListener ----
+
+			@Override
+			public void actionPerformed( ActionEvent e ) {
+				if( timer != null && !isDisplayable() ) {
+					timer.stop();
+					return;
+				}
+
+				scroll( direction == SwingConstants.NORTH ? -1 : 1 );
+			}
+		}
+	}
 }

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

@@ -160,6 +160,12 @@ public class FlatProgressBarUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	public Dimension getPreferredSize( JComponent c ) {
 		Dimension size = super.getPreferredSize( c );

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

@@ -16,18 +16,20 @@
 
 package com.formdev.flatlaf.ui;
 
-import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Graphics;
 import java.beans.PropertyChangeListener;
+import java.lang.invoke.MethodHandles;
 import java.util.Map;
 import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.LookAndFeel;
 import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.basic.BasicMenuItemUI;
 import javax.swing.plaf.basic.BasicRadioButtonMenuItemUI;
+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.ui.FlatStylingSupport.UnknownStyleException;
 import com.formdev.flatlaf.util.LoggingFacade;
 
 /**
@@ -58,9 +60,15 @@ import com.formdev.flatlaf.util.LoggingFacade;
  *
  * @author Karl Tauber
  */
+@StyleableField( cls=BasicMenuItemUI.class, key="selectionBackground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="selectionForeground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="disabledForeground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="acceleratorForeground" )
+@StyleableField( cls=BasicMenuItemUI.class, key="acceleratorSelectionForeground" )
+
 public class FlatRadioButtonMenuItemUI
 	extends BasicRadioButtonMenuItemUI
-	implements StyleableUI
+	implements StyleableUI, StyleableLookupProvider
 {
 	private FlatMenuItemRenderer renderer;
 	private Map<String, Object> oldStyleValues;
@@ -119,29 +127,27 @@ public class FlatRadioButtonMenuItemUI
 
 	/** @since 2 */
 	protected Object applyStyleProperty( String key, Object value ) {
-		try {
-			return renderer.applyStyleProperty( key, value );
-		} catch ( UnknownStyleException ex ) {
-			// ignore
-		}
-
-		Object oldValue;
-		switch( key ) {
-			// BasicMenuItemUI
-			case "selectionBackground": oldValue = selectionBackground; selectionBackground = (Color) value; return oldValue;
-			case "selectionForeground": oldValue = selectionForeground; selectionForeground = (Color) value; return oldValue;
-			case "disabledForeground": oldValue = disabledForeground; disabledForeground = (Color) value; return oldValue;
-			case "acceleratorForeground": oldValue = acceleratorForeground; acceleratorForeground = (Color) value; return oldValue;
-			case "acceleratorSelectionForeground": oldValue = acceleratorSelectionForeground; acceleratorSelectionForeground = (Color) value; return oldValue;
-		}
-
-		return FlatStylingSupport.applyToAnnotatedObjectOrComponent( this, menuItem, key, value );
+		return FlatMenuItemUI.applyStyleProperty( menuItem, this, renderer, key, value );
 	}
 
 	/** @since 2 */
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
-		return FlatMenuItemUI.getStyleableInfos( renderer );
+		return FlatMenuItemUI.getStyleableInfos( this, renderer );
+	}
+
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatMenuItemUI.getStyleableValue( this, renderer, key );
+	}
+
+	/** @since 2.5 */
+	@Override
+	public MethodHandles.Lookup getLookupForStyling() {
+		// MethodHandles.lookup() is caller sensitive and must be invoked in this class,
+		// otherwise it is not possible to access protected fields in JRE superclass
+		return MethodHandles.lookup();
 	}
 
 	@Override

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

@@ -18,12 +18,16 @@ package com.formdev.flatlaf.ui;
 
 import static com.formdev.flatlaf.util.UIScale.scale;
 import java.awt.Color;
+import java.awt.Component;
 import java.awt.Container;
 import java.awt.Dimension;
 import java.awt.Graphics;
 import java.awt.Insets;
 import java.awt.Rectangle;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
 import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
 import java.util.Map;
 import java.util.Objects;
 import javax.swing.AbstractButton;
@@ -31,6 +35,7 @@ import javax.swing.CellRendererPane;
 import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.LookAndFeel;
+import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicButtonListener;
@@ -78,7 +83,7 @@ public class FlatRadioButtonUI
 	private Map<String, Object> oldStyleValues;
 
 	public static ComponentUI createUI( JComponent c ) {
-		return FlatUIUtils.canUseSharedUI( c )
+		return FlatUIUtils.canUseSharedUI( c ) && !FlatUIUtils.needsLightAWTPeer( c )
 			? FlatUIUtils.createSharedUI( FlatRadioButtonUI.class, () -> new FlatRadioButtonUI( true ) )
 			: new FlatRadioButtonUI( false );
 	}
@@ -90,11 +95,29 @@ public class FlatRadioButtonUI
 
 	@Override
 	public void installUI( JComponent c ) {
+		if( FlatUIUtils.needsLightAWTPeer( c ) )
+			FlatUIUtils.runWithLightAWTPeerUIDefaults( () -> installUIImpl( c ) );
+		else
+			installUIImpl( c );
+	}
+
+	private void installUIImpl( JComponent c ) {
 		super.installUI( c );
 
+		if( FlatUIUtils.isAWTPeer( c ) )
+			AWTPeerMouseExitedFix.install( c );
+
 		installStyle( (AbstractButton) c );
 	}
 
+	@Override
+	public void uninstallUI( JComponent c ) {
+		super.uninstallUI( c );
+
+		if( FlatUIUtils.isAWTPeer( c ) )
+			AWTPeerMouseExitedFix.uninstall( c );
+	}
+
 	@Override
 	public void installDefaults( AbstractButton b ) {
 		super.installDefaults( b );
@@ -199,7 +222,20 @@ public class FlatRadioButtonUI
 		return infos;
 	}
 
-	private static Insets tempInsets = new Insets( 0, 0, 0, 0 );
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		// style icon
+		if( key.startsWith( "icon." ) ) {
+			return (icon instanceof FlatCheckBoxIcon)
+				? ((FlatCheckBoxIcon)icon).getStyleableValue( key.substring( "icon.".length() ) )
+				: null;
+		}
+
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
+	private static final Insets tempInsets = new Insets( 0, 0, 0, 0 );
 
 	@Override
 	public Dimension getPreferredSize( JComponent c ) {
@@ -212,7 +248,7 @@ public class FlatRadioButtonUI
 		if( focusWidth > 0 ) {
 			// Increase preferred width and height if insets were explicitly reduced (e.g. with
 			// an EmptyBorder) and icon has a focus width, which is not included in icon size.
-			// Otherwise the component may be too small and outer focus border may be cut off.
+			// Otherwise, the component may be too small and outer focus border may be cut off.
 			Insets insets = c.getInsets( tempInsets );
 			size.width += Math.max( focusWidth - insets.left, 0 ) + Math.max( focusWidth - insets.right, 0 );
 			size.height += Math.max( focusWidth - insets.top, 0 ) + Math.max( focusWidth - insets.bottom, 0 );
@@ -308,4 +344,69 @@ public class FlatRadioButtonUI
 			FlatRadioButtonUI.this.propertyChange( b, e );
 		}
 	}
+
+	//---- class AWTPeerMouseExitedFix ----------------------------------------
+
+	/**
+	 * Hack for missing mouse-exited event for java.awt.Checkbox on macOS (to fix hover effect).
+	 *
+	 * On macOS, AWT components internally use Swing components.
+	 * This is implemented in class sun.lwawt.LWCheckboxPeer, which uses
+	 * a container component CheckboxDelegate that has a JCheckBox and a JRadioButton
+	 * as children. Only one of them is visible.
+	 *
+	 * The reason that mouse-exited event is not sent to the JCheckBox or JRadioButton
+	 * is that sun.lwawt.LWComponentPeer.createDelegateEvent() uses
+	 * SwingUtilities.getDeepestComponentAt() to find the event target,
+	 * which finds the container component CheckboxDelegate,
+	 * which receives the mouse-exited event.
+	 *
+	 * This class adds listeners and forwards the mouse-exited event
+	 * from CheckboxDelegate to JCheckBox or JRadioButton.
+	 */
+	private static class AWTPeerMouseExitedFix
+		extends MouseAdapter
+		implements PropertyChangeListener
+	{
+		private final JComponent button;
+
+		static void install( JComponent button ) {
+			AWTPeerMouseExitedFix l = new AWTPeerMouseExitedFix( button );
+			button.addPropertyChangeListener( "ancestor", l );
+			Container parent = button.getParent();
+			if( parent != null )
+				parent.addMouseListener( l );
+		}
+
+		static void uninstall( JComponent button ) {
+			for( PropertyChangeListener l : button.getPropertyChangeListeners( "ancestor" ) ) {
+				if( l instanceof AWTPeerMouseExitedFix ) {
+					button.removePropertyChangeListener( "ancestor", l );
+					Container parent = button.getParent();
+					if( parent != null )
+						parent.removeMouseListener( (AWTPeerMouseExitedFix) l );
+					break;
+				}
+			}
+		}
+
+		AWTPeerMouseExitedFix( JComponent button ) {
+			this.button = button;
+		}
+
+		@Override
+		public void propertyChange( PropertyChangeEvent e ) {
+			if( e.getOldValue() instanceof Component )
+				((Component)e.getOldValue()).removeMouseListener( this );
+			if( e.getNewValue() instanceof Component ) {
+				((Component)e.getNewValue()).removeMouseListener( this ); // avoid duplicate listeners
+				((Component)e.getNewValue()).addMouseListener( this );
+			}
+		}
+
+		@Override
+		public void mouseExited( MouseEvent e ) {
+			button.dispatchEvent( SwingUtilities.convertMouseEvent( e.getComponent(), e, button ) );
+		}
+	}
 }

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

@@ -161,13 +161,26 @@ public class FlatRootPaneUI
 			c.putClientProperty( "jetbrains.awt.windowDarkAppearance", FlatLaf.isLafDark() );
 	}
 
+	@Override
+	protected void uninstallDefaults( JRootPane c ) {
+		super.uninstallDefaults( c );
+
+		// uninstall background, foreground and font because not all Lafs set them
+		if( c.isBackgroundSet() && c.getBackground() instanceof UIResource )
+			c.setBackground( null );
+		if( c.isForegroundSet() && c.getForeground() instanceof UIResource )
+			c.setForeground( null );
+		if( c.isFontSet() && c.getFont() instanceof UIResource )
+			c.setFont( null );
+	}
+
 	@Override
 	protected void installListeners( JRootPane root ) {
 		super.installListeners( root );
 
 		if( SystemInfo.isJava_9_orLater ) {
-			// On HiDPI screens, where scaling is used, there may be white lines at the
-			// bottom and at the right side of the window when it is initially shown.
+			// On HiDPI screens, where scaling is used, there may be white lines on the
+			// bottom and on the right side of the window when it is initially shown.
 			// This is very disturbing in dark themes, but hard to notice in light themes.
 			// Seems to be a rounding issue when Swing adds dirty region of window
 			// using RepaintManager.nativeAddDirtyRegion().
@@ -351,6 +364,12 @@ public class FlatRootPaneUI
 			((FlatRootPaneUI)ui).titlePane.isMenuBarEmbedded();
 	}
 
+	/** @since 2.4 */
+	protected static FlatTitlePane getTitlePane( JRootPane rootPane ) {
+		RootPaneUI ui = rootPane.getUI();
+		return ui instanceof FlatRootPaneUI ? ((FlatRootPaneUI)ui).titlePane : null;
+	}
+
 	//---- class FlatRootLayout -----------------------------------------------
 
 	protected class FlatRootLayout
@@ -497,7 +516,7 @@ public class FlatRootPaneUI
 				return;
 
 			Container parent = c.getParent();
-			boolean active = parent instanceof Window ? ((Window)parent).isActive() : false;
+			boolean active = parent instanceof Window && ((Window)parent).isActive();
 
 			g.setColor( FlatUIUtils.deriveColor( active ? activeBorderColor : inactiveBorderColor, baseBorderColor ) );
 			HiDPIUtils.paintAtScale1x( (Graphics2D) g, x, y, width, height, this::paintImpl );
@@ -509,9 +528,7 @@ public class FlatRootPaneUI
 
 		protected boolean isWindowMaximized( Component c ) {
 			Container parent = c.getParent();
-			return parent instanceof Frame
-				? (((Frame)parent).getExtendedState() & Frame.MAXIMIZED_BOTH) != 0
-				: false;
+			return parent instanceof Frame && (((Frame)parent).getExtendedState() & Frame.MAXIMIZED_BOTH) != 0;
 		}
 	}
 

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

@@ -17,6 +17,7 @@
 package com.formdev.flatlaf.ui;
 
 import java.awt.Color;
+import java.awt.Container;
 import java.awt.Dimension;
 import java.awt.Graphics;
 import java.awt.Insets;
@@ -24,6 +25,7 @@ import java.awt.Rectangle;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.beans.PropertyChangeListener;
+import java.lang.invoke.MethodHandles;
 import java.util.Map;
 import java.util.Objects;
 import javax.swing.InputMap;
@@ -36,9 +38,13 @@ import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicScrollBarUI;
 import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.FlatLaf;
 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.LoggingFacade;
+import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -57,6 +63,7 @@ import com.formdev.flatlaf.util.UIScale;
  *
  * <!-- FlatScrollBarUI -->
  *
+ * @uiDefault ScrollBar.minimumButtonSize			Dimension
  * @uiDefault ScrollBar.trackInsets					Insets
  * @uiDefault ScrollBar.thumbInsets					Insets
  * @uiDefault ScrollBar.trackArc					int
@@ -76,13 +83,20 @@ import com.formdev.flatlaf.util.UIScale;
  *
  * @author Karl Tauber
  */
+@StyleableField( cls=BasicScrollBarUI.class, key="track", fieldName="trackColor" )
+@StyleableField( cls=BasicScrollBarUI.class, key="thumb", fieldName="thumbColor" )
+@StyleableField( cls=BasicScrollBarUI.class, key="width", fieldName="scrollBarWidth" )
+@StyleableField( cls=BasicScrollBarUI.class, key="minimumThumbSize" )
+@StyleableField( cls=BasicScrollBarUI.class, key="maximumThumbSize" )
+
 public class FlatScrollBarUI
 	extends BasicScrollBarUI
-	implements StyleableUI
+	implements StyleableUI, StyleableLookupProvider
 {
 	// overrides BasicScrollBarUI.supportsAbsolutePositioning (which is private)
 	@Styleable protected boolean allowsAbsolutePositioning;
 
+	/** @since 2.1 */ @Styleable protected Dimension minimumButtonSize;
 	@Styleable protected Insets trackInsets;
 	@Styleable protected Insets thumbInsets;
 	@Styleable protected int trackArc;
@@ -106,6 +120,7 @@ public class FlatScrollBarUI
 	protected boolean hoverThumb;
 
 	private Map<String, Object> oldStyleValues;
+	private boolean isAWTPeer;
 
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatScrollBarUI();
@@ -142,6 +157,7 @@ public class FlatScrollBarUI
 
 		allowsAbsolutePositioning = super.getSupportsAbsolutePositioning();
 
+		minimumButtonSize = UIManager.getDimension( "ScrollBar.minimumButtonSize" );
 		trackInsets = UIManager.getInsets( "ScrollBar.trackInsets" );
 		thumbInsets = UIManager.getInsets( "ScrollBar.thumbInsets" );
 		trackArc = UIManager.getInt( "ScrollBar.trackArc" );
@@ -171,6 +187,7 @@ public class FlatScrollBarUI
 	protected void uninstallDefaults() {
 		super.uninstallDefaults();
 
+		minimumButtonSize = null;
 		trackInsets = null;
 		thumbInsets = null;
 		hoverTrackColor = null;
@@ -217,6 +234,37 @@ public class FlatScrollBarUI
 					}
 					SwingUtilities.replaceUIInputMap( scrollbar, JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, inputMap );
 					break;
+
+				case "ancestor":
+					// check whether scroll bar is used as AWT peer on macOS
+					if( SystemInfo.isMacOS ) {
+						Container p = scrollbar.getParent();
+						for( int i = 0; i < 2 && p != null; i++, p = p.getParent() ) {
+							if( FlatUIUtils.isAWTPeer( p ) ) {
+								// Used to disable hover, which does not work correctly
+								// because scroll bars do not receive mouse exited event.
+								// The scroll pane, including its scroll bars, is not part
+								// of the component hierarchy and does not receive mouse events
+								// directly. Instead LWComponentPeer receives mouse events
+								// and delegates them to peers, but entered/exited events
+								// are sent only for the whole scroll pane.
+								// Exited event is only sent when mouse leaves scroll pane.
+								// If mouse enters/exits scroll bar, no entered/exited events are sent.
+								isAWTPeer = true;
+
+								// if dark theme is active, reinstall using light theme
+								if( FlatLaf.isLafDark() ) {
+									FlatUIUtils.runWithLightAWTPeerUIDefaults( () -> {
+										JScrollBar scrollbar = this.scrollbar;
+										uninstallUI( scrollbar );
+										installUI( scrollbar );
+									} );
+								}
+								break;
+							}
+						}
+					}
+					break;
 			}
 		};
 	}
@@ -242,30 +290,27 @@ public class FlatScrollBarUI
 
 	/** @since 2 */
 	protected Object applyStyleProperty( String key, Object value ) {
-		Object oldValue;
-		switch( key ) {
-			// BasicScrollBarUI
-			case "track": oldValue = trackColor; trackColor = (Color) value; return oldValue;
-			case "thumb": oldValue = thumbColor; thumbColor = (Color) value; return oldValue;
-			case "width": oldValue = scrollBarWidth; scrollBarWidth = (int) value; return oldValue;
-			case "minimumThumbSize": oldValue = minimumThumbSize; minimumThumbSize = (Dimension) value; return oldValue;
-			case "maximumThumbSize": oldValue = maximumThumbSize; maximumThumbSize = (Dimension) value; return oldValue;
-		}
-
 		return FlatStylingSupport.applyToAnnotatedObjectOrComponent( this, scrollbar, key, value );
 	}
 
 	/** @since 2 */
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
-		Map<String, Class<?>> infos = new FlatStylingSupport.StyleableInfosMap<>();
-		infos.put( "track", Color.class );
-		infos.put( "thumb", Color.class );
-		infos.put( "width", int.class );
-		infos.put( "minimumThumbSize", Dimension.class );
-		infos.put( "maximumThumbSize", Dimension.class );
-		FlatStylingSupport.collectAnnotatedStyleableInfos( this, infos );
-		return infos;
+		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
+	}
+
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
+	/** @since 2.5 */
+	@Override
+	public MethodHandles.Lookup getLookupForStyling() {
+		// MethodHandles.lookup() is caller sensitive and must be invoked in this class,
+		// otherwise it is not possible to access protected fields in JRE superclass
+		return MethodHandles.lookup();
 	}
 
 	@Override
@@ -353,7 +398,7 @@ public class FlatScrollBarUI
 		Color trackColor = FlatUIUtils.deriveColor( this.trackColor, c.getBackground() );
 		return (pressed && pressedTrackColor != null)
 			? FlatUIUtils.deriveColor( pressedTrackColor, trackColor )
-			: ((hover && hoverTrackColor != null)
+			: ((hover && hoverTrackColor != null && !isAWTPeer)
 				? FlatUIUtils.deriveColor( hoverTrackColor, trackColor )
 				: trackColor);
 	}
@@ -363,7 +408,7 @@ public class FlatScrollBarUI
 		Color thumbColor = FlatUIUtils.deriveColor( this.thumbColor, trackColor );
 		return (pressed && pressedThumbColor != null)
 			? FlatUIUtils.deriveColor( pressedThumbColor, thumbColor )
-			: ((hover && hoverThumbColor != null)
+			: ((hover && hoverThumbColor != null && !isAWTPeer)
 				? FlatUIUtils.deriveColor( hoverThumbColor, thumbColor )
 				: thumbColor);
 	}
@@ -451,7 +496,6 @@ public class FlatScrollBarUI
 			super( direction, type, foreground, disabledForeground,
 				hoverForeground, hoverBackground, pressedForeground, pressedBackground );
 
-			setArrowWidth( FlatArrowButton.DEFAULT_ARROW_WIDTH - 2 );
 			setFocusable( false );
 			setRequestFocusEnabled( false );
 		}
@@ -461,6 +505,18 @@ public class FlatScrollBarUI
 				null, hoverButtonBackground, null, pressedButtonBackground );
 		}
 
+		@Override
+		public int getArrowWidth() {
+			// scale arrow size depending on scroll bar width
+			// (6 is default arrow width; 10 is base scroll bar width)
+			int arrowWidth = Math.round( 6 * (scrollBarWidth / 10f) );
+
+			// compute arrow size that leaves equal space on both sides (arrow is centered)
+			arrowWidth = scrollBarWidth - (((scrollBarWidth - arrowWidth) / 2) * 2);
+
+			return arrowWidth;
+		}
+
 		@Override
 		protected Color deriveBackground( Color background ) {
 			return FlatUIUtils.deriveColor( background, scrollbar.getBackground() );
@@ -469,8 +525,9 @@ public class FlatScrollBarUI
 		@Override
 		public Dimension getPreferredSize() {
 			if( isShowButtons() ) {
-				int w = UIScale.scale( scrollBarWidth );
-				return new Dimension( w, w );
+				int w = UIScale.scale( Math.max( scrollBarWidth, (minimumButtonSize != null) ? minimumButtonSize.width : 0 ) );
+				int h = UIScale.scale( Math.max( scrollBarWidth, (minimumButtonSize != null) ? minimumButtonSize.height : 0 ) );
+				return new Dimension( w, h );
 			} else
 				return new Dimension();
 		}

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

@@ -87,6 +87,13 @@ public class FlatScrollPaneUI
 
 	@Override
 	public void installUI( JComponent c ) {
+		if( FlatUIUtils.needsLightAWTPeer( c ) )
+			FlatUIUtils.runWithLightAWTPeerUIDefaults( () -> installUIImpl( c ) );
+		else
+			installUIImpl( c );
+	}
+
+	private void installUIImpl( JComponent c ) {
 		super.installUI( c );
 
 		int focusWidth = UIManager.getInt( "Component.focusWidth" );
@@ -291,6 +298,10 @@ public class FlatScrollPaneUI
 					}
 					break;
 
+				case FlatClientProperties.OUTLINE:
+					scrollpane.repaint();
+					break;
+
 				case FlatClientProperties.STYLE:
 				case FlatClientProperties.STYLE_CLASS:
 					installStyle();
@@ -339,6 +350,12 @@ public class FlatScrollPaneUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this, scrollpane.getBorder() );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, scrollpane.getBorder(), key );
+	}
+
 	@Override
 	protected void updateViewport( PropertyChangeEvent e ) {
 		super.updateViewport( e );

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

@@ -21,6 +21,7 @@ import java.awt.Dimension;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.geom.Rectangle2D;
+import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.util.Map;
 import javax.swing.JComponent;
@@ -28,6 +29,7 @@ import javax.swing.JSeparator;
 import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 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.LoggingFacade;
@@ -50,7 +52,7 @@ import com.formdev.flatlaf.util.LoggingFacade;
  */
 public class FlatSeparatorUI
 	extends BasicSeparatorUI
-	implements StyleableUI
+	implements StyleableUI, PropertyChangeListener
 {
 	@Styleable protected int height;
 	@Styleable protected int stripeWidth;
@@ -58,7 +60,6 @@ public class FlatSeparatorUI
 
 	private final boolean shared;
 	private boolean defaults_initialized = false;
-	private PropertyChangeListener propertyChangeListener;
 	private Map<String, Object> oldStyleValues;
 
 	public static ComponentUI createUI( JComponent c ) {
@@ -109,28 +110,33 @@ public class FlatSeparatorUI
 	protected void installListeners( JSeparator s ) {
 		super.installListeners( s );
 
-		propertyChangeListener = FlatStylingSupport.createPropertyChangeListener(
-			s, () -> stylePropertyChange( s ), null );
-		s.addPropertyChangeListener( propertyChangeListener );
+		s.addPropertyChangeListener( this );
 	}
 
 	@Override
 	protected void uninstallListeners( JSeparator s ) {
 		super.uninstallListeners( s );
 
-		s.removePropertyChangeListener( propertyChangeListener );
-		propertyChangeListener = null;
+		s.removePropertyChangeListener( this );
 	}
 
-	private void stylePropertyChange( JSeparator s ) {
-		if( shared && FlatStylingSupport.hasStyleProperty( s ) ) {
-			// unshare component UI if necessary
-			// updateUI() invokes installStyle() from installUI()
-			s.updateUI();
-		} else
-			installStyle( s );
-		s.revalidate();
-		s.repaint();
+	/** @since 2.0.1 */
+	@Override
+	public void propertyChange( PropertyChangeEvent e ) {
+		switch( e.getPropertyName() ) {
+			case FlatClientProperties.STYLE:
+			case FlatClientProperties.STYLE_CLASS:
+				JSeparator s = (JSeparator) e.getSource();
+				if( shared && FlatStylingSupport.hasStyleProperty( s ) ) {
+					// unshare component UI if necessary
+					// updateUI() invokes installStyle() from installUI()
+					s.updateUI();
+				} else
+					installStyle( s );
+				s.revalidate();
+				s.repaint();
+				break;
+		}
 	}
 
 	/** @since 2 */
@@ -164,6 +170,12 @@ public class FlatSeparatorUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	public void paint( Graphics g, JComponent c ) {
 		Graphics2D g2 = (Graphics2D) g.create();

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

@@ -222,6 +222,12 @@ public class FlatSliderUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	public int getBaseline( JComponent c, int width, int height ) {
 		if( c == null )
@@ -234,7 +240,7 @@ public class FlatSliderUI
 			return -1;
 
 		// use default font (instead of slider font) because the slider font size
-		// may be different to label font size, but we want align the track/thumb with labels
+		// may be different to label font size, but we want to align the track/thumb with labels
 		Font font = UIManager.getFont( "defaultFont" );
 		if( font == null )
 			font = slider.getFont();

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

@@ -223,6 +223,12 @@ public class FlatSpinnerUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this, spinner.getBorder() );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, spinner.getBorder(), key );
+	}
+
 	@Override
 	protected JComponent createEditor() {
 		JComponent editor = super.createEditor();
@@ -293,9 +299,7 @@ public class FlatSpinnerUI
 			return true;
 
 		JTextField textField = getEditorTextField( spinner.getEditor() );
-		return (textField != null)
-			? FlatUIUtils.isPermanentFocusOwner( textField )
-			: false;
+		return textField != null && FlatUIUtils.isPermanentFocusOwner( textField );
 	}
 
 	protected Color getBackground( boolean enabled ) {
@@ -447,7 +451,7 @@ public class FlatSpinnerUI
 			Insets padding = scale( FlatSpinnerUI.this.padding );
 			Dimension editorSize = (editor != null) ? editor.getPreferredSize() : new Dimension( 0, 0 );
 
-			// the arrows width is the same as the inner height so that the arrows area is square
+			// the arrow buttons width is the same as the inner height so that the arrow buttons area is square
 			int minimumWidth = FlatUIUtils.minimumWidth( spinner, FlatSpinnerUI.this.minimumWidth );
 			int innerHeight = editorSize.height + padding.top + padding.bottom;
 			float focusWidth = FlatUIUtils.getBorderFocusWidth( spinner );
@@ -538,6 +542,7 @@ public class FlatSpinnerUI
 					break;
 
 				case FlatClientProperties.COMPONENT_ROUND_RECT:
+				case FlatClientProperties.OUTLINE:
 					spinner.repaint();
 					break;
 

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

@@ -34,6 +34,7 @@ import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicSplitPaneDivider;
 import javax.swing.plaf.basic.BasicSplitPaneUI;
+import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
@@ -52,6 +53,13 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault SplitPaneDivider.border					Border
  * @uiDefault SplitPaneDivider.draggingColor			Color	only used if continuousLayout is false
  *
+ * <!-- BasicSplitPaneDivider -->
+ *
+ * @uiDefault SplitPane.oneTouchButtonSize				int
+ * @uiDefault SplitPane.oneTouchButtonOffset			int
+ * @uiDefault SplitPane.centerOneTouchButtons			boolean
+ * @uiDefault SplitPane.supportsOneTouchButtons			boolean	optional; default is true
+ *
  * <!-- JSplitPane -->
  *
  * @uiDefault SplitPane.continuousLayout				boolean
@@ -175,6 +183,17 @@ public class FlatSplitPaneUI
 		return infos;
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		if( divider instanceof FlatSplitPaneDivider ) {
+			Object value = ((FlatSplitPaneDivider)divider).getStyleableValue( key );
+			if( value != null )
+				return value;
+		}
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	//---- class FlatSplitPaneDivider -----------------------------------------
 
 	protected class FlatSplitPaneDivider
@@ -192,20 +211,21 @@ public class FlatSplitPaneUI
 			setLayout( new FlatDividerLayout() );
 		}
 
-		/**
-		 * @since 2
-		 */
+		/** @since 2 */
 		protected Object applyStyleProperty( String key, Object value ) {
 			return FlatStylingSupport.applyToAnnotatedObject( this, key, value );
 		}
 
-		/**
-		 * @since 2
-		 */
+		/** @since 2 */
 		public Map<String, Class<?>> getStyleableInfos() {
 			return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 		}
 
+		/** @since 2.5 */
+		public Object getStyleableValue( String key ) {
+			return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+		}
+
 		void updateStyle() {
 			if( leftButton instanceof FlatOneTouchButton )
 				((FlatOneTouchButton)leftButton).updateStyle();
@@ -235,7 +255,7 @@ public class FlatSplitPaneUI
 			switch( e.getPropertyName() ) {
 				case JSplitPane.DIVIDER_LOCATION_PROPERTY:
 					// necessary to show/hide one-touch buttons on expand/collapse
-					revalidate();
+					doLayout();
 					break;
 			}
 		}
@@ -345,7 +365,7 @@ public class FlatSplitPaneUI
 				if( leftButton == null || rightButton == null || !splitPane.isOneTouchExpandable() )
 					return;
 
-				// increase side of buttons, which makes them easier to hit by the user
+				// increase size of buttons, which makes them easier to hit by the user
 				// and avoids cut arrows at small divider sizes
 				int extraSize = UIScale.scale( 4 );
 				if( orientation == JSplitPane.VERTICAL_SPLIT ) {
@@ -360,10 +380,19 @@ public class FlatSplitPaneUI
 
 				// hide buttons if not applicable
 				boolean leftCollapsed = isLeftCollapsed();
-				if( leftCollapsed )
+				boolean rightCollapsed = isRightCollapsed();
+				if( leftCollapsed || rightCollapsed ) {
+					leftButton.setVisible( !leftCollapsed );
+					rightButton.setVisible( !rightCollapsed );
+				} else {
+					Object expandableSide = splitPane.getClientProperty( FlatClientProperties.SPLIT_PANE_EXPANDABLE_SIDE );
+					leftButton.setVisible( expandableSide == null || !FlatClientProperties.SPLIT_PANE_EXPANDABLE_SIDE_LEFT.equals( expandableSide ) );
+					rightButton.setVisible( expandableSide == null || !FlatClientProperties.SPLIT_PANE_EXPANDABLE_SIDE_RIGHT.equals( expandableSide ) );
+				}
+
+				// move right button if left button is hidden
+				if( !leftButton.isVisible() )
 					rightButton.setLocation( leftButton.getLocation() );
-				leftButton.setVisible( !leftCollapsed );
-				rightButton.setVisible( !isRightCollapsed() );
 			}
 		}
 	}

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

@@ -18,9 +18,11 @@ package com.formdev.flatlaf.ui;
 
 import java.beans.PropertyChangeListener;
 import java.lang.annotation.ElementType;
+import java.lang.annotation.Repeatable;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
+import java.lang.invoke.MethodHandles;
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
@@ -63,15 +65,55 @@ public class FlatStylingSupport
 		Class<?> type() default Void.class;
 	}
 
+	/**
+	 * Indicates that a field in the specified (super) class
+	 * is intended to be used by FlatLaf styling support.
+	 * <p>
+	 * Use this annotation, instead of {@link Styleable}, to style fields
+	 * in superclasses, where it is not possible to use {@link Styleable}.
+	 * <p>
+	 * Classes using this annotation may implement {@link StyleableLookupProvider}
+	 * to give access to protected fields (in JRE) in modular applications.
+	 *
+	 * @since 2.5
+	 */
+	@Target(ElementType.TYPE)
+	@Retention(RetentionPolicy.RUNTIME)
+	@Repeatable(StyleableFields.class)
+	public @interface StyleableField {
+		Class<?> cls();
+		String key();
+		String fieldName() default "";
+	}
+
+	/**
+	 * Container annotation for {@link StyleableField}.
+	 *
+	 * @since 2.5
+	 */
+	@Target(ElementType.TYPE)
+	@Retention(RetentionPolicy.RUNTIME)
+	public @interface StyleableFields {
+		StyleableField[] value();
+	}
+
+
 	/** @since 2 */
 	public interface StyleableUI {
 		Map<String, Class<?>> getStyleableInfos( JComponent c );
+		/** @since 2.5 */ Object getStyleableValue( JComponent c, String key );
 	}
 
 	/** @since 2 */
 	public interface StyleableBorder {
 		Object applyStyleProperty( String key, Object value );
 		Map<String, Class<?>> getStyleableInfos();
+		/** @since 2.5 */ Object getStyleableValue( String key );
+	}
+
+	/** @since 2.5 */
+	public interface StyleableLookupProvider {
+		MethodHandles.Lookup getLookupForStyling();
 	}
 
 
@@ -359,27 +401,31 @@ public class FlatStylingSupport
 	 * @param key the name of the field
 	 * @param value the new value
 	 * @return the old value of the field
-	 * @throws UnknownStyleException if object does not have a annotated field with given name
+	 * @throws UnknownStyleException if object does not have an annotated field with given name
 	 * @throws IllegalArgumentException if value type does not fit to expected type
 	 */
 	public static Object applyToAnnotatedObject( Object obj, String key, Object value )
 		throws UnknownStyleException, IllegalArgumentException
 	{
-		String fieldName = key;
-		int dotIndex = key.indexOf( '.' );
-		if( dotIndex >= 0 ) {
-			// remove first dot in key and change subsequent character to uppercase
-			fieldName = key.substring( 0, dotIndex )
-				+ Character.toUpperCase( key.charAt( dotIndex + 1 ) )
-				+ key.substring( dotIndex + 2 );
-		}
+		String fieldName = keyToFieldName( key );
 
 		return applyToField( obj, fieldName, key, value, field -> {
 			Styleable styleable = field.getAnnotation( Styleable.class );
-			return styleable != null && styleable.dot() == (dotIndex >= 0);
+			return styleable != null && styleable.dot() == (fieldName != key);
 		} );
 	}
 
+	private static String keyToFieldName( String key ) {
+		int dotIndex = key.indexOf( '.' );
+		if( dotIndex < 0 )
+			return key;
+
+		// remove first dot in key and change subsequent character to uppercase
+		return key.substring( 0, dotIndex )
+			+ Character.toUpperCase( key.charAt( dotIndex + 1 ) )
+			+ key.substring( dotIndex + 2 );
+	}
+
 	/**
 	 * Applies the given value to a field of the given object.
 	 *
@@ -405,26 +451,17 @@ public class FlatStylingSupport
 		for(;;) {
 			try {
 				Field f = cls.getDeclaredField( fieldName );
-				if( predicate == null || predicate.test( f ) ) {
-					if( !isValidField( f ) )
-						throw new IllegalArgumentException( "field '" + cls.getName() + "." + fieldName + "' is final or static" );
-
-					try {
-						// necessary to access protected fields in other packages
-						f.setAccessible( true );
-
-						// get old value and set new value
-						Object oldValue = f.get( obj );
-						f.set( obj, convertToEnum( value, f.getType() ) );
-						return oldValue;
-					} catch( IllegalAccessException ex ) {
-						throw new IllegalArgumentException( "failed to access field '" + cls.getName() + "." + fieldName + "'", ex );
-					}
-				}
+				if( predicate == null || predicate.test( f ) )
+					return applyToField( f, obj, value, false );
 			} catch( NoSuchFieldException ex ) {
 				// field not found in class --> try superclass
 			}
 
+			for( StyleableField styleableField : cls.getAnnotationsByType( StyleableField.class ) ) {
+				if( key.equals( styleableField.key() ) )
+					return applyToField( getStyleableField( styleableField ), obj, value, true );
+			}
+
 			cls = cls.getSuperclass();
 			if( cls == null )
 				throw new UnknownStyleException( key );
@@ -437,11 +474,83 @@ public class FlatStylingSupport
 		}
 	}
 
+	private static Object applyToField( Field f, Object obj, Object value, boolean useMethodHandles ) {
+		checkValidField( f );
+
+		if( useMethodHandles && obj instanceof StyleableLookupProvider ) {
+			try {
+				// use method handles to access protected fields in JRE in modular applications
+				MethodHandles.Lookup lookup = ((StyleableLookupProvider)obj).getLookupForStyling();
+
+				// get old value and set new value
+				Object oldValue = lookup.unreflectGetter( f ).invoke( obj );
+				lookup.unreflectSetter( f ).invoke( obj, convertToEnum( value, f.getType() ) );
+				return oldValue;
+			} catch( Throwable ex ) {
+				throw newFieldAccessFailed( f, ex );
+			}
+		}
+
+		try {
+			// necessary to access protected fields in other packages
+			f.setAccessible( true );
+
+			// get old value and set new value
+			Object oldValue = f.get( obj );
+			f.set( obj, convertToEnum( value, f.getType() ) );
+			return oldValue;
+		} catch( IllegalAccessException ex ) {
+			throw newFieldAccessFailed( f, ex );
+		}
+	}
+
+	private static Object getFieldValue( Field f, Object obj, boolean useMethodHandles ) {
+		checkValidField( f );
+
+		if( useMethodHandles && obj instanceof StyleableLookupProvider ) {
+			// use method handles to access protected fields in JRE in modular applications
+			try {
+				MethodHandles.Lookup lookup = ((StyleableLookupProvider)obj).getLookupForStyling();
+				return lookup.unreflectGetter( f ).invoke( obj );
+			} catch( Throwable ex ) {
+				throw newFieldAccessFailed( f, ex );
+			}
+		}
+
+		try {
+			f.setAccessible( true );
+			return f.get( obj );
+		} catch( IllegalAccessException ex ) {
+			throw newFieldAccessFailed( f, ex );
+		}
+	}
+
+	private static IllegalArgumentException newFieldAccessFailed( Field f, Throwable ex ) {
+		return new IllegalArgumentException( "failed to access field '" + f.getDeclaringClass().getName() + "." + f.getName() + "'", ex );
+	}
+
+	private static void checkValidField( Field f ) {
+		if( !isValidField( f ) )
+			throw new IllegalArgumentException( "field '" + f.getDeclaringClass().getName() + "." + f.getName() + "' is final or static" );
+	}
+
 	private static boolean isValidField( Field f ) {
 		int modifiers = f.getModifiers();
 		return (modifiers & (Modifier.FINAL|Modifier.STATIC)) == 0 && !f.isSynthetic();
 	}
 
+	private static Field getStyleableField( StyleableField styleableField ) {
+		String fieldName = styleableField.fieldName();
+		if( fieldName.isEmpty() )
+			fieldName = styleableField.key();
+
+		try {
+			return styleableField.cls().getDeclaredField( fieldName );
+		} catch( NoSuchFieldException ex ) {
+			throw new IllegalArgumentException( "field '" + styleableField.cls().getName() + "." + fieldName + "' not found", ex );
+		}
+	}
+
 	/**
 	 * Applies the given value to a property of the given object.
 	 * Works only for properties that have public getter and setter methods.
@@ -517,7 +626,7 @@ public class FlatStylingSupport
 	 * @param key the name of the field
 	 * @param value the new value
 	 * @return the old value of the field
-	 * @throws UnknownStyleException if object does not have a annotated field with given name
+	 * @throws UnknownStyleException if object does not have an annotated field with given name
 	 * @throws IllegalArgumentException if value type does not fit to expected type
 	 */
 	public static Object applyToAnnotatedObjectOrComponent( Object obj, Object comp, String key, Object value )
@@ -628,6 +737,7 @@ public class FlatStylingSupport
 		Class<?> cls = obj.getClass();
 
 		for(;;) {
+			// find fields annotated with 'Styleable'
 			for( Field f : cls.getDeclaredFields() ) {
 				if( !isValidField( f ) )
 					continue;
@@ -666,6 +776,20 @@ public class FlatStylingSupport
 				infos.put( name, type );
 			}
 
+			// get fields specified in 'StyleableField' annotation
+			for( StyleableField styleableField : cls.getAnnotationsByType( StyleableField.class ) ) {
+				String name = styleableField.key();
+
+				// for the case that the same field name is used in a class and in
+				// one of its superclasses, do not process field in superclass
+				if( processedFields.contains( name ) )
+					continue;
+				processedFields.add( name );
+
+				Field f = getStyleableField( styleableField );
+				infos.put( name, f.getType() );
+			}
+
 			cls = cls.getSuperclass();
 			if( cls == null )
 				return;
@@ -686,6 +810,52 @@ public class FlatStylingSupport
 			infos.put( keyPrefix.concat( e.getKey() ), e.getValue() );
 	}
 
+	public static Object getAnnotatedStyleableValue( Object obj, String key ) {
+		String fieldName = keyToFieldName( key );
+		Class<?> cls = obj.getClass();
+
+		for(;;) {
+			try {
+				// find field annotated with 'Styleable'
+				Field f = cls.getDeclaredField( fieldName );
+				Styleable styleable = f.getAnnotation( Styleable.class );
+				if( styleable != null ) {
+					if( styleable.dot() != (fieldName != key) )
+						throw new IllegalArgumentException( "'Styleable.dot' on field '" + fieldName + "' does not match key '" + key + "'" );
+					if( styleable.type() != Void.class )
+						throw new IllegalArgumentException( "'Styleable.type' on field '" + fieldName + "' not supported" );
+
+					return getFieldValue( f, obj, false );
+				}
+			} catch( NoSuchFieldException ex ) {
+				// field not found in class --> try superclass
+			}
+
+			// find field specified in 'StyleableField' annotation
+			for( StyleableField styleableField : cls.getAnnotationsByType( StyleableField.class ) ) {
+				if( key.equals( styleableField.key() ) )
+					return getFieldValue( getStyleableField( styleableField ), obj, true );
+			}
+
+			cls = cls.getSuperclass();
+			if( cls == null )
+				return null;
+
+			String superclassName = cls.getName();
+			if( superclassName.startsWith( "java." ) || superclassName.startsWith( "javax." ) )
+				return null;
+		}
+	}
+
+	public static Object getAnnotatedStyleableValue( Object obj, Border border, String key ) {
+		if( border instanceof StyleableBorder ) {
+			Object value = ((StyleableBorder)border).getStyleableValue( key );
+			if( value != null )
+				return value;
+		}
+		return getAnnotatedStyleableValue( obj, key );
+	}
+
 	//---- class UnknownStyleException ----------------------------------------
 
 	public static class UnknownStyleException

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

@@ -59,6 +59,7 @@ import java.util.Map;
 import java.util.Set;
 import java.util.function.BiConsumer;
 import java.util.function.IntConsumer;
+import java.util.function.Predicate;
 import javax.accessibility.Accessible;
 import javax.accessibility.AccessibleContext;
 import javax.swing.Action;
@@ -82,10 +83,12 @@ import javax.swing.event.ChangeListener;
 import javax.swing.event.PopupMenuEvent;
 import javax.swing.event.PopupMenuListener;
 import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.TabbedPaneUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicTabbedPaneUI;
 import javax.swing.text.JTextComponent;
 import javax.swing.text.View;
+import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.icons.FlatTabbedPaneCloseIcon;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
@@ -127,6 +130,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault TabbedPane.selectedBackground				Color	optional
  * @uiDefault TabbedPane.selectedForeground				Color
  * @uiDefault TabbedPane.underlineColor					Color
+ * @uiDefault TabbedPane.inactiveUnderlineColor			Color
  * @uiDefault TabbedPane.disabledUnderlineColor			Color
  * @uiDefault TabbedPane.hoverColor						Color
  * @uiDefault TabbedPane.focusColor						Color
@@ -141,7 +145,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault TabbedPane.showTabSeparators				boolean
  * @uiDefault TabbedPane.tabSeparatorsFullHeight		boolean
  * @uiDefault TabbedPane.hasFullBorder					boolean
- * @uiDefault TabbedPane.activeTabBorder				boolean
+ * @uiDefault TabbedPane.rotateTabRuns					boolean
  *
  * @uiDefault TabbedPane.tabLayoutPolicy				String	wrap (default) or scroll
  * @uiDefault TabbedPane.tabType						String	underlined (default) or card
@@ -198,6 +202,7 @@ public class FlatTabbedPaneUI
 	@Styleable protected Color selectedBackground;
 	@Styleable protected Color selectedForeground;
 	@Styleable protected Color underlineColor;
+	/** @since 2.2 */ @Styleable protected Color inactiveUnderlineColor;
 	@Styleable protected Color disabledUnderlineColor;
 	@Styleable protected Color hoverColor;
 	@Styleable protected Color focusColor;
@@ -215,6 +220,7 @@ public class FlatTabbedPaneUI
 	@Styleable protected boolean tabSeparatorsFullHeight;
 	@Styleable protected boolean hasFullBorder;
 	@Styleable protected boolean tabsOpaque = true;
+	/** @since 2.5 */ @Styleable protected boolean rotateTabRuns = true;
 
 	@Styleable(type=String.class) private int tabType;
 	@Styleable(type=String.class) private int tabsPopupPolicy;
@@ -288,6 +294,7 @@ public class FlatTabbedPaneUI
 
 		super.installUI( c );
 
+		FlatSelectedTabRepainter.install();
 		installStyle();
 	}
 
@@ -318,6 +325,7 @@ public class FlatTabbedPaneUI
 		selectedBackground = UIManager.getColor( "TabbedPane.selectedBackground" );
 		selectedForeground = UIManager.getColor( "TabbedPane.selectedForeground" );
 		underlineColor = UIManager.getColor( "TabbedPane.underlineColor" );
+		inactiveUnderlineColor = FlatUIUtils.getUIColor( "TabbedPane.inactiveUnderlineColor", underlineColor );
 		disabledUnderlineColor = UIManager.getColor( "TabbedPane.disabledUnderlineColor" );
 		hoverColor = UIManager.getColor( "TabbedPane.hoverColor" );
 		focusColor = UIManager.getColor( "TabbedPane.focusColor" );
@@ -335,6 +343,7 @@ public class FlatTabbedPaneUI
 		tabSeparatorsFullHeight = UIManager.getBoolean( "TabbedPane.tabSeparatorsFullHeight" );
 		hasFullBorder = UIManager.getBoolean( "TabbedPane.hasFullBorder" );
 		tabsOpaque = UIManager.getBoolean( "TabbedPane.tabsOpaque" );
+		rotateTabRuns = FlatUIUtils.getUIBoolean( "TabbedPane.rotateTabRuns", true );
 
 		tabType = parseTabType( UIManager.getString( "TabbedPane.tabType" ) );
 		tabsPopupPolicy = parseTabsPopupPolicy( UIManager.getString( "TabbedPane.tabsPopupPolicy" ) );
@@ -385,6 +394,7 @@ public class FlatTabbedPaneUI
 		selectedBackground = null;
 		selectedForeground = null;
 		underlineColor = null;
+		inactiveUnderlineColor = null;
 		disabledUnderlineColor = null;
 		hoverColor = null;
 		focusColor = null;
@@ -650,7 +660,7 @@ public class FlatTabbedPaneUI
 				case "tabIconPlacement": value = parseTabIconPlacement( (String) value ); break;
 			}
 		} else {
-			Object oldValue = null;
+			Object oldValue;
 			switch( key ) {
 				// BasicTabbedPaneUI
 				case "tabInsets": oldValue = tabInsets; tabInsets = (Insets) value; return oldValue;
@@ -679,6 +689,76 @@ public class FlatTabbedPaneUI
 		return infos;
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		// close icon
+		if( key.startsWith( "close" ) ) {
+			return (closeIcon instanceof FlatTabbedPaneCloseIcon)
+				? ((FlatTabbedPaneCloseIcon)closeIcon).getStyleableValue( key )
+				: null;
+		}
+
+		switch( key ) {
+			// BasicTabbedPaneUI
+			case "tabInsets":		return tabInsets;
+			case "tabAreaInsets":	return tabAreaInsets;
+			case "textIconGap":		return textIconGapUnscaled;
+
+			// FlatTabbedPaneUI
+			case "tabType":
+				switch( tabType ) {
+					default:
+					case TAB_TYPE_UNDERLINED:	return TABBED_PANE_TAB_TYPE_UNDERLINED;
+					case TAB_TYPE_CARD:			return TABBED_PANE_TAB_TYPE_CARD;
+				}
+
+			case "tabsPopupPolicy":
+				switch( tabsPopupPolicy ) {
+					default:
+					case AS_NEEDED:				return TABBED_PANE_POLICY_AS_NEEDED;
+					case NEVER:					return TABBED_PANE_POLICY_NEVER;
+				}
+
+			case "scrollButtonsPolicy":
+				switch( scrollButtonsPolicy ) {
+					default:
+					case AS_NEEDED_SINGLE:		return TABBED_PANE_POLICY_AS_NEEDED_SINGLE;
+					case AS_NEEDED:				return TABBED_PANE_POLICY_AS_NEEDED;
+					case NEVER:					return TABBED_PANE_POLICY_NEVER;
+				}
+
+			case "scrollButtonsPlacement":
+				switch( scrollButtonsPlacement ) {
+					default:
+					case BOTH:					return TABBED_PANE_PLACEMENT_BOTH;
+					case TRAILING:				return TABBED_PANE_PLACEMENT_TRAILING;
+				}
+
+			case "tabAreaAlignment":	return alignmentToString( tabAreaAlignment, TABBED_PANE_ALIGN_LEADING );
+			case "tabAlignment":			return alignmentToString( tabAlignment, TABBED_PANE_ALIGN_CENTER );
+
+			case "tabWidthMode":
+				switch( tabWidthMode ) {
+					default:
+					case WIDTH_MODE_PREFERRED:	return TABBED_PANE_TAB_WIDTH_MODE_PREFERRED;
+					case WIDTH_MODE_EQUAL:		return TABBED_PANE_TAB_WIDTH_MODE_EQUAL;
+					case WIDTH_MODE_COMPACT:	return TABBED_PANE_TAB_WIDTH_MODE_COMPACT;
+				}
+
+			case "tabIconPlacement":
+				switch( tabIconPlacement ) {
+					default:
+					case LEADING:				return "leading";
+					case TRAILING:				return "trailing";
+					case TOP:					return "top";
+					case BOTTOM:				return "bottom";
+				}
+		}
+
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	protected void setRolloverTab( int x, int y ) {
 		setRolloverTab( tabForCoordinate( tabPane, x, y ) );
 	}
@@ -733,7 +813,6 @@ public class FlatTabbedPaneUI
 
 		// increase size of repaint region to include part of content border
 		if( contentSeparatorHeight > 0 &&
-			getTabType() == TAB_TYPE_CARD &&
 			clientPropertyBoolean( tabPane, TABBED_PANE_SHOW_CONTENT_SEPARATOR, true ) )
 		{
 			int sh = scale( contentSeparatorHeight );
@@ -1015,7 +1094,7 @@ public class FlatTabbedPaneUI
 
 		// paint selection indicator
 		if( isSelected )
-			paintTabSelection( g, tabPlacement, x, y, w, h );
+			paintTabSelection( g, tabPlacement, tabIndex, x, y, w, h );
 
 		if( tabPane.getTabComponentAt( tabIndex ) != null )
 			return;
@@ -1204,12 +1283,19 @@ public class FlatTabbedPaneUI
 		}
 	}
 
-	protected void paintTabSelection( Graphics g, int tabPlacement, int x, int y, int w, int h ) {
-		g.setColor( tabPane.isEnabled() ? underlineColor : disabledUnderlineColor );
+	protected void paintTabSelection( Graphics g, int tabPlacement, int tabIndex, int x, int y, int w, int h ) {
+		g.setColor( tabPane.isEnabled()
+			? (isTabbedPaneOrChildFocused() ? underlineColor : inactiveUnderlineColor)
+			: disabledUnderlineColor );
 
 		// paint underline selection
 		boolean atBottom = (getTabType() != TAB_TYPE_CARD);
-		Insets contentInsets = getContentBorderInsets( tabPlacement );
+		Insets contentInsets = atBottom
+			? ((!rotateTabRuns && runCount > 1 && !isScrollTabLayout() && getRunForTab( tabPane.getTabCount(), tabIndex ) > 0)
+				? new Insets( 0, 0, 0, 0 )
+				: getContentBorderInsets( tabPlacement ))
+			: null;
+
 		int tabSelectionHeight = scale( atBottom ? this.tabSelectionHeight : cardTabSelectionHeight );
 		int sx, sy;
 		switch( tabPlacement ) {
@@ -1236,6 +1322,23 @@ public class FlatTabbedPaneUI
 		}
 	}
 
+	/** @since 2.2 */
+	@SuppressWarnings( "unchecked" )
+	protected boolean isTabbedPaneOrChildFocused() {
+		KeyboardFocusManager keyboardFocusManager = KeyboardFocusManager.getCurrentKeyboardFocusManager();
+
+		Object value = tabPane.getClientProperty( FlatClientProperties.COMPONENT_FOCUS_OWNER );
+		if( value instanceof Predicate ) {
+			return ((Predicate<JComponent>)value).test( tabPane ) &&
+				FlatUIUtils.isInActiveWindow( tabPane, keyboardFocusManager.getActiveWindow() );
+		}
+
+		Component focusOwner = keyboardFocusManager.getPermanentFocusOwner();
+		return focusOwner != null &&
+			SwingUtilities.isDescendingFrom( focusOwner, tabPane ) &&
+			FlatUIUtils.isInActiveWindow( focusOwner, keyboardFocusManager.getActiveWindow() );
+	}
+
 	/**
 	 * Actually does nearly the same as super.paintContentBorder() but
 	 *   - not using UIManager.getColor("TabbedPane.contentAreaColor") to be GUI builder friendly
@@ -1351,7 +1454,7 @@ public class FlatTabbedPaneUI
 			else
 				g.clipRect( 0, vr.y, tabPane.getWidth(), vr.height );
 
-			paintTabSelection( g, tabPlacement, tabRect.x, tabRect.y, tabRect.width, tabRect.height );
+			paintTabSelection( g, tabPlacement, selectedIndex, tabRect.x, tabRect.y, tabRect.width, tabRect.height );
 			g.setClip( oldClip );
 		}
 	}
@@ -1504,6 +1607,11 @@ public class FlatTabbedPaneUI
 		super.getTabRunCount( tabPane );
 	}
 
+	@Override
+	protected boolean shouldRotateTabRuns( int tabPlacement ) {
+		return rotateTabRuns;
+	}
+
 	private boolean isLastInRun( int tabIndex ) {
 		int run = getRunForTab( tabPane.getTabCount(), tabIndex );
 		return lastTabInRun( tabPane.getTabCount(), run ) == tabIndex;
@@ -1659,6 +1767,16 @@ public class FlatTabbedPaneUI
 		}
 	}
 
+	private static String alignmentToString( int value, String defaultValue ) {
+		switch( value ) {
+			case LEADING:		return TABBED_PANE_ALIGN_LEADING;
+			case TRAILING:		return TABBED_PANE_ALIGN_TRAILING;
+			case CENTER:		return TABBED_PANE_ALIGN_CENTER;
+			case FILL:			return TABBED_PANE_ALIGN_FILL;
+			default:			return defaultValue;
+		}
+	}
+
 	protected static int parseTabWidthMode( String str ) {
 		if( str == null )
 			return WIDTH_MODE_PREFERRED;
@@ -1841,7 +1959,7 @@ public class FlatTabbedPaneUI
 			super( direction, arrowType,
 				FlatTabbedPaneUI.this.foreground, FlatTabbedPaneUI.this.disabledForeground,
 				null, buttonHoverBackground, null, buttonPressedBackground );
-			setArrowWidth( 10 );
+			setArrowWidth( 11 );
 		}
 
 		protected void updateStyle() {
@@ -1983,7 +2101,7 @@ public class FlatTabbedPaneUI
 		}
 
 		protected JMenuItem createTabMenuItem( int tabIndex ) {
-			// search for tab name in this places
+			// search for tab name in these places
 			//   1. tab title
 			//   2. text of label or text component in custom tab component (including children)
 			//   3. accessible name of tab
@@ -2016,7 +2134,7 @@ public class FlatTabbedPaneUI
 				menuItem.setOpaque( true );
 			}
 
-			if( !tabPane.isEnabledAt( tabIndex ) )
+			if( !tabPane.isEnabled() || !tabPane.isEnabledAt( tabIndex ) )
 				menuItem.setEnabled( false );
 
 			menuItem.addActionListener( e -> selectTab( tabIndex ) );
@@ -2412,7 +2530,7 @@ public class FlatTabbedPaneUI
 			if( tabPane == null || tabViewport == null )
 				return;
 
-			if( !scrolled || tabViewport == null )
+			if( !scrolled )
 				return;
 			scrolled = false;
 
@@ -2525,9 +2643,7 @@ public class FlatTabbedPaneUI
 			setRolloverTab( tabIndex );
 
 			// check whether mouse hit tab close area
-			boolean hitClose = isTabClosable( tabIndex )
-				? getTabCloseHitArea( tabIndex ).contains( x, y )
-				: false;
+			boolean hitClose = isTabClosable( tabIndex ) && getTabCloseHitArea( tabIndex ).contains( x, y );
 			if( e.getID() == MouseEvent.MOUSE_PRESSED )
 				pressedTabIndex = hitClose ? tabIndex : -1;
 			setRolloverTabClose( hitClose );
@@ -2550,8 +2666,7 @@ public class FlatTabbedPaneUI
 			if( tabIndex == lastTipTabIndex )
 				return; // closeTip already set
 
-			if( tabIndex != lastTipTabIndex )
-				restoreTabToolTip();
+			restoreTabToolTip();
 
 			lastTipTabIndex = tabIndex;
 			lastTip = tabPane.getToolTipTextAt( lastTipTabIndex );
@@ -3344,4 +3459,77 @@ public class FlatTabbedPaneUI
 				delegate.actionPerformed( e );
 		}
 	}
+
+	//---- class FlatSelectedTabRepainter -------------------------------------
+
+	private static class FlatSelectedTabRepainter
+		implements PropertyChangeListener//, Runnable
+	{
+		private static FlatSelectedTabRepainter instance;
+
+		private KeyboardFocusManager keyboardFocusManager;
+
+		static void install() {
+			synchronized( FlatSelectedTabRepainter.class ) {
+				if( instance != null )
+					return;
+
+				instance = new FlatSelectedTabRepainter();
+			}
+		}
+
+		FlatSelectedTabRepainter() {
+			keyboardFocusManager = KeyboardFocusManager.getCurrentKeyboardFocusManager();
+			keyboardFocusManager.addPropertyChangeListener( this );
+		}
+
+		private void uninstall() {
+			synchronized( FlatSelectedTabRepainter.class ) {
+				if( instance == null )
+					return;
+
+				keyboardFocusManager.removePropertyChangeListener( this );
+				keyboardFocusManager = null;
+				instance = null;
+			}
+		}
+
+		@Override
+		public void propertyChange( PropertyChangeEvent e ) {
+			// uninstall if no longer using FlatLaf
+			if( !(UIManager.getLookAndFeel() instanceof FlatLaf) ) {
+				uninstall();
+				return;
+			}
+
+			switch( e.getPropertyName() ) {
+				case "permanentFocusOwner":
+					Object oldValue = e.getOldValue();
+					Object newValue = e.getNewValue();
+					if( oldValue instanceof Component )
+						repaintSelectedTabs( (Component) oldValue );
+					if( newValue instanceof Component )
+						repaintSelectedTabs( (Component) newValue );
+					break;
+
+				case "activeWindow":
+					repaintSelectedTabs( keyboardFocusManager.getPermanentFocusOwner() );
+					break;
+			}
+		}
+
+		private void repaintSelectedTabs( Component c ) {
+			if( c instanceof JTabbedPane )
+				repaintSelectedTab( (JTabbedPane) c );
+
+			while( (c = SwingUtilities.getAncestorOfClass( JTabbedPane.class, c )) != null )
+				repaintSelectedTab( (JTabbedPane) c );
+		}
+
+		private void repaintSelectedTab( JTabbedPane tabbedPane ) {
+			TabbedPaneUI ui = tabbedPane.getUI();
+			if( ui instanceof FlatTabbedPaneUI )
+				((FlatTabbedPaneUI) ui).repaintTab( tabbedPane.getSelectedIndex() );
+		}
+	}
 }

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

@@ -72,7 +72,7 @@ public class FlatTableCellBorder
 	}
 
 	/**
-	 * Because this borders are always shared for all tables,
+	 * Because this border is always shared for all tables,
 	 * get border specific style from FlatTableUI.
 	 */
 	static <T> T getStyleFromTableUI( Component c, Function<FlatTableUI, T> f ) {

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

@@ -39,7 +39,9 @@ import javax.swing.event.MouseInputListener;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicTableHeaderUI;
+import javax.swing.table.JTableHeader;
 import javax.swing.table.TableCellRenderer;
+import javax.swing.table.TableColumn;
 import javax.swing.table.TableColumnModel;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.StyleableUI;
@@ -169,6 +171,22 @@ public class FlatTableHeaderUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		if( key.equals( "sortIconPosition" ) ) {
+			switch( sortIconPosition ) {
+				default:
+				case SwingConstants.RIGHT:	return "right";
+				case SwingConstants.LEFT:	return "left";
+				case SwingConstants.TOP:	return "top";
+				case SwingConstants.BOTTOM:	return "bottom";
+			}
+		}
+
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	private static int parseSortIconPosition( String str ) {
 		if( str == null )
 			str = "";
@@ -195,6 +213,8 @@ public class FlatTableHeaderUI
 
 	@Override
 	public void paint( Graphics g, JComponent c ) {
+		fixDraggedAndResizingColumns( header );
+
 		TableColumnModel columnModel = header.getColumnModel();
 		if( columnModel.getColumnCount() <= 0 )
 			return;
@@ -269,6 +289,32 @@ public class FlatTableHeaderUI
 		return size;
 	}
 
+	static void fixDraggedAndResizingColumns( JTableHeader header ) {
+		if( header == null )
+			return;
+
+		// Dragged column may be outdated in the case that the table structure
+		// was changed from a table header popup menu action. In this case
+		// the paint methods in BasicTableHeaderUI and BasicTableUI would throw exceptions.
+		TableColumn draggedColumn = header.getDraggedColumn();
+		if( draggedColumn != null && !isValidColumn( header.getColumnModel(), draggedColumn ) )
+			header.setDraggedColumn( null );
+
+		// also clear outdated resizing column (although this seems not cause exceptions)
+		TableColumn resizingColumn = header.getResizingColumn();
+		if( resizingColumn != null && !isValidColumn( header.getColumnModel(), resizingColumn ) )
+			header.setResizingColumn( null );
+	}
+
+	private static boolean isValidColumn( TableColumnModel cm, TableColumn column ) {
+		int count = cm.getColumnCount();
+		for( int i = 0; i < count; i++ ) {
+			if( cm.getColumn( i ) == column )
+				return true;
+		}
+		return false;
+	}
+
 	//---- class FlatTableCellHeaderRenderer ----------------------------------
 
 	/**

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

@@ -80,6 +80,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Table.intercellSpacing					Dimension
  * @uiDefault Table.selectionInactiveBackground			Color
  * @uiDefault Table.selectionInactiveForeground			Color
+ * @uiDefault Table.paintOutsideAlternateRows			boolean
  *
  * <!-- FlatTableCellBorder -->
  *
@@ -95,7 +96,7 @@ import com.formdev.flatlaf.util.UIScale;
  */
 public class FlatTableUI
 	extends BasicTableUI
-	implements StyleableUI
+	implements StyleableUI, FlatViewportUI.ViewportPainter
 {
 	protected boolean showHorizontalLines;
 	protected boolean showVerticalLines;
@@ -285,10 +286,16 @@ public class FlatTableUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	/**
 	 * Toggle selection colors from focused to inactive and vice versa.
 	 *
-	 * This is not a optimal solution but much easier than rewriting the whole paint methods.
+	 * This is not an optimal solution but much easier than rewriting the whole paint methods.
 	 *
 	 * Using a LaF specific renderer was avoided because often a custom renderer is
 	 * already used in applications. Then either the inactive colors are not used,
@@ -313,6 +320,8 @@ public class FlatTableUI
 
 	@Override
 	public void paint( Graphics g, JComponent c ) {
+		FlatTableHeaderUI.fixDraggedAndResizingColumns( table.getTableHeader() );
+
 		boolean horizontalLines = table.getShowHorizontalLines();
 		boolean verticalLines = table.getShowVerticalLines();
 		if( horizontalLines || verticalLines ) {
@@ -421,4 +430,38 @@ public class FlatTableUI
 			? (viewport != rowHeader)
 			: (viewport == rowHeader || rowHeader == null);
 	}
+
+	/** @since 2.3 */
+	@Override
+	public void paintViewport( Graphics g, JComponent c, JViewport viewport ) {
+		int viewportWidth = viewport.getWidth();
+		int viewportHeight = viewport.getHeight();
+
+		// fill viewport background in same color as table background
+		if( viewport.isOpaque() ) {
+			g.setColor( table.getBackground() );
+			g.fillRect( 0, 0, viewportWidth, viewportHeight );
+		}
+
+		// paint alternating empty rows
+		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
+			int tableHeight = table.getHeight();
+			if( tableHeight < viewportHeight ) {
+				int tableWidth = table.getWidth();
+				int rowHeight = table.getRowHeight();
+
+				for( int y = tableHeight, row = rowCount; y < viewportHeight; y += rowHeight, row++ ) {
+					if( row % 2 != 0 )
+						g.fillRect( 0, y, tableWidth, rowHeight );
+				}
+			}
+		}
+	}
 }

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

@@ -86,6 +86,13 @@ public class FlatTextAreaUI
 
 	@Override
 	public void installUI( JComponent c ) {
+		if( FlatUIUtils.needsLightAWTPeer( c ) )
+			FlatUIUtils.runWithLightAWTPeerUIDefaults( () -> installUIImpl( c ) );
+		else
+			installUIImpl( c );
+	}
+
+	private void installUIImpl( JComponent c ) {
 		super.installUI( c );
 
 		installStyle();
@@ -183,6 +190,12 @@ public class FlatTextAreaUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	private void updateBackground() {
 		FlatTextFieldUI.updateBackground( getComponent(), background,
 			disabledBackground, inactiveBackground,

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

@@ -128,6 +128,13 @@ public class FlatTextFieldUI
 
 	@Override
 	public void installUI( JComponent c ) {
+		if( FlatUIUtils.needsLightAWTPeer( c ) )
+			FlatUIUtils.runWithLightAWTPeerUIDefaults( () -> installUIImpl( c ) );
+		else
+			installUIImpl( c );
+	}
+
+	private void installUIImpl( JComponent c ) {
 		super.installUI( c );
 
 		leadingIcon = clientProperty( c, TEXT_FIELD_LEADING_ICON, null, Icon.class );
@@ -232,6 +239,7 @@ public class FlatTextFieldUI
 		switch( e.getPropertyName() ) {
 			case PLACEHOLDER_TEXT:
 			case COMPONENT_ROUND_RECT:
+			case OUTLINE:
 			case TEXT_FIELD_PADDING:
 				c.repaint();
 				break;
@@ -353,6 +361,12 @@ public class FlatTextFieldUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this, getComponent().getBorder() );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, getComponent().getBorder(), key );
+	}
+
 	private void updateBackground() {
 		updateBackground( getComponent(), background,
 			disabledBackground, inactiveBackground,
@@ -368,7 +382,7 @@ public class FlatTextFieldUI
 		if( !(oldBackground instanceof UIResource) )
 			return;
 
-		// do not update background if it currently has a unknown color (assigned from outside)
+		// do not update background if it currently has an unknown color (assigned from outside)
 		if( oldBackground != background &&
 			oldBackground != disabledBackground &&
 			oldBackground != inactiveBackground &&
@@ -609,7 +623,7 @@ debug*/
 	 * Returns the rectangle used to paint leading and trailing icons.
 	 * It invokes {@code super.getVisibleEditorRect()} and reduces left and/or
 	 * right margin if the text field has leading or trailing icons or components.
-	 * Also the preferred widths of leading and trailing components are removed.
+	 * Also, the preferred widths of leading and trailing components are removed.
 	 *
 	 * @since 2
 	 */
@@ -764,6 +778,7 @@ debug*/
 	/** @since 2 */
 	protected JComponent createClearButton() {
 		JButton button = new JButton();
+		button.setName( "TextField.clearButton" );
 		button.putClientProperty( STYLE_CLASS, "clearButton" );
 		button.putClientProperty( BUTTON_TYPE, BUTTON_TYPE_TOOLBAR_BUTTON );
 		button.setCursor( Cursor.getDefaultCursor() );
@@ -825,15 +840,20 @@ debug*/
 	/** @since 2 */
 	protected void prepareLeadingOrTrailingComponent( JComponent c ) {
 		c.putClientProperty( STYLE_CLASS, "inTextField" );
-		c.setCursor( Cursor.getDefaultCursor() );
 
-		if( c instanceof JButton || c instanceof JToggleButton )
+		if( c instanceof JButton || c instanceof JToggleButton ) {
 			c.putClientProperty( BUTTON_TYPE, BUTTON_TYPE_TOOLBAR_BUTTON );
-		else if( c instanceof JToolBar ) {
+
+			if( !c.isCursorSet() )
+				c.setCursor( Cursor.getDefaultCursor() );
+		} else if( c instanceof JToolBar ) {
 			for( Component child : c.getComponents() ) {
 				if( child instanceof JComponent )
 					((JComponent)child).putClientProperty( STYLE_CLASS, "inTextField" );
 			}
+
+			if( !c.isCursorSet() )
+				c.setCursor( Cursor.getDefaultCursor() );
 		}
 	}
 
@@ -937,6 +957,7 @@ debug*/
 				((LayoutManager2)delegate).invalidateLayout( target );
 		}
 	}
+
 	//---- class FlatDocumentListener -----------------------------------------
 
 	private class FlatDocumentListener

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

@@ -191,6 +191,12 @@ public class FlatTextPaneUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	private void updateBackground() {
 		FlatTextFieldUI.updateBackground( getComponent(), background,
 			disabledBackground, inactiveBackground,

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

@@ -24,6 +24,8 @@ import java.awt.Container;
 import java.awt.Dialog;
 import java.awt.Dimension;
 import java.awt.EventQueue;
+import java.awt.Font;
+import java.awt.FontMetrics;
 import java.awt.Frame;
 import java.awt.Graphics;
 import java.awt.GraphicsConfiguration;
@@ -31,6 +33,7 @@ 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.ComponentEvent;
@@ -50,13 +53,14 @@ import javax.accessibility.AccessibleContext;
 import javax.swing.BorderFactory;
 import javax.swing.Box;
 import javax.swing.BoxLayout;
+import javax.swing.Icon;
 import javax.swing.JButton;
 import javax.swing.JComponent;
+import javax.swing.JDialog;
 import javax.swing.JLabel;
 import javax.swing.JMenuBar;
 import javax.swing.JPanel;
 import javax.swing.JRootPane;
-import javax.swing.SwingConstants;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.border.AbstractBorder;
@@ -70,6 +74,7 @@ import com.formdev.flatlaf.util.UIScale;
 /**
  * Provides the Flat LaF title bar.
  *
+ * @uiDefault TitlePane.font								Font
  * @uiDefault TitlePane.background							Color
  * @uiDefault TitlePane.inactiveBackground					Color
  * @uiDefault TitlePane.foreground							Color
@@ -78,15 +83,20 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault TitlePane.borderColor							Color	optional
  * @uiDefault TitlePane.unifiedBackground					boolean
  * @uiDefault TitlePane.showIcon							boolean
+ * @uiDefault TitlePane.showIconInDialogs					boolean
  * @uiDefault TitlePane.noIconLeftGap						int
  * @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.centerTitle							boolean
  * @uiDefault TitlePane.centerTitleIfMenuBarEmbedded		boolean
+ * @uiDefault TitlePane.showIconBesideTitle					boolean
  * @uiDefault TitlePane.menuBarTitleGap						int
+ * @uiDefault TitlePane.menuBarResizeHeight					int
  * @uiDefault TitlePane.closeIcon							Icon
  * @uiDefault TitlePane.iconifyIcon							Icon
  * @uiDefault TitlePane.maximizeIcon						Icon
@@ -97,6 +107,7 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatTitlePane
 	extends JComponent
 {
+	/** @since 2.5 */ protected final Font titleFont = UIManager.getFont( "TitlePane.font" );
 	protected final Color activeBackground = UIManager.getColor( "TitlePane.background" );
 	protected final Color inactiveBackground = UIManager.getColor( "TitlePane.inactiveBackground" );
 	protected final Color activeForeground = UIManager.getColor( "TitlePane.foreground" );
@@ -105,12 +116,18 @@ public class FlatTitlePane
 	protected final Color borderColor = UIManager.getColor( "TitlePane.borderColor" );
 
 	/** @since 2 */ protected final boolean showIcon = FlatUIUtils.getUIBoolean( "TitlePane.showIcon", true );
+	/** @since 2.5 */ protected final boolean showIconInDialogs = FlatUIUtils.getUIBoolean( "TitlePane.showIconInDialogs", true );
 	/** @since 2 */ protected final int noIconLeftGap = FlatUIUtils.getUIInt( "TitlePane.noIconLeftGap", 8 );
 	protected final Dimension iconSize = UIManager.getDimension( "TitlePane.iconSize" );
+	/** @since 2.4 */ protected final int titleMinimumWidth = FlatUIUtils.getUIInt( "TitlePane.titleMinimumWidth", 60 );
+	/** @since 2.4 */ protected final int buttonMinimumWidth = FlatUIUtils.getUIInt( "TitlePane.buttonMinimumWidth", 30 );
 	protected final int buttonMaximizedHeight = UIManager.getInt( "TitlePane.buttonMaximizedHeight" );
 	protected final boolean centerTitle = UIManager.getBoolean( "TitlePane.centerTitle" );
 	protected final boolean centerTitleIfMenuBarEmbedded = FlatUIUtils.getUIBoolean( "TitlePane.centerTitleIfMenuBarEmbedded", true );
-	protected final int menuBarTitleGap = FlatUIUtils.getUIInt( "TitlePane.menuBarTitleGap", 20 );
+	/** @since 2.4 */ protected final boolean showIconBesideTitle = UIManager.getBoolean( "TitlePane.showIconBesideTitle" );
+	protected final int menuBarTitleGap = FlatUIUtils.getUIInt( "TitlePane.menuBarTitleGap", 40 );
+	/** @since 2.4 */ protected final int menuBarTitleMinimumGap = FlatUIUtils.getUIInt( "TitlePane.menuBarTitleMinimumGap", 12 );
+	/** @since 2.4 */ protected final int menuBarResizeHeight = FlatUIUtils.getUIInt( "TitlePane.menuBarResizeHeight", 4 );
 
 	protected final JRootPane rootPane;
 
@@ -142,6 +159,8 @@ public class FlatTitlePane
 
 		// necessary for closing window with double-click on icon
 		iconLabel.addMouseListener( handler );
+
+		applyComponentOrientation( rootPane.getComponentOrientation() );
 	}
 
 	protected FlatTitlePaneBorder createTitlePaneBorder() {
@@ -163,7 +182,6 @@ public class FlatTitlePane
 		};
 		iconLabel.setBorder( new FlatEmptyBorder( UIManager.getInsets( "TitlePane.iconMargins" ) ) );
 		titleLabel.setBorder( new FlatEmptyBorder( UIManager.getInsets( "TitlePane.titleMargins" ) ) );
-		titleLabel.setHorizontalAlignment( SwingConstants.CENTER );
 
 		leftPanel.setLayout( new BoxLayout( leftPanel, BoxLayout.LINE_AXIS ) );
 		leftPanel.setOpaque( false );
@@ -183,18 +201,52 @@ public class FlatTitlePane
 		setLayout( new BorderLayout() {
 			@Override
 			public void layoutContainer( Container target ) {
-				super.layoutContainer( target );
-
-				// make left panel (with embedded menu bar) smaller if horizontal space is rare
-				// to avoid that embedded menu bar overlaps button bar
+				// compute available bounds
 				Insets insets = target.getInsets();
-				int width = target.getWidth() - insets.left - insets.right;
-				if( leftPanel.getWidth() + buttonPanel.getWidth() > width ) {
-					int oldWidth = leftPanel.getWidth();
-					int newWidth = Math.max( width - buttonPanel.getWidth(), 0 );
-					leftPanel.setSize( newWidth, leftPanel.getHeight() );
-					if( !getComponentOrientation().isLeftToRight() )
-						leftPanel.setLocation( leftPanel.getX() + (oldWidth - newWidth), leftPanel.getY() );
+				int x = insets.left;
+				int y = insets.top;
+				int w = target.getWidth() - insets.left - insets.right;
+				int h = target.getHeight() - insets.top - insets.bottom;
+
+				// compute widths
+				int leftWidth = leftPanel.getPreferredSize().width;
+				int buttonsWidth = buttonPanel.getPreferredSize().width;
+				int titleWidth = w - leftWidth - buttonsWidth;
+				int minTitleWidth = UIScale.scale( titleMinimumWidth );
+
+				// increase minimum width if icon is show besides the title
+				Icon icon = titleLabel.getIcon();
+				if( icon != null ) {
+					Insets iconInsets = iconLabel.getInsets();
+					int iconTextGap = titleLabel.getComponentOrientation().isLeftToRight() ? iconInsets.right : iconInsets.left;
+					minTitleWidth += icon.getIconWidth() + iconTextGap;
+				}
+
+				// if title is too small, reduce width of buttons
+				if( titleWidth < minTitleWidth ) {
+					buttonsWidth = Math.max( buttonsWidth - (minTitleWidth - titleWidth), buttonPanel.getMinimumSize().width );
+					titleWidth = w - leftWidth - buttonsWidth;
+				}
+
+				// if title is still too small, reduce width of left panel (icon and embedded menu bar)
+				if( titleWidth < minTitleWidth ) {
+					int minLeftWidth = iconLabel.isVisible()
+						? iconLabel.getWidth() - iconLabel.getInsets().right
+						: UIScale.scale( noIconLeftGap );
+					leftWidth = Math.max( leftWidth - (minTitleWidth - titleWidth), minLeftWidth );
+					titleWidth = w - leftWidth - buttonsWidth;
+				}
+
+				if( target.getComponentOrientation().isLeftToRight() ) {
+					// left-to-right
+					leftPanel.setBounds( x, y, leftWidth, h );
+					titleLabel.setBounds( x + leftWidth, y, titleWidth, h );
+					buttonPanel.setBounds( x + leftWidth + titleWidth, y, buttonsWidth, h );
+				} else {
+					// right-to-left
+					buttonPanel.setBounds( x, y, buttonsWidth, h );
+					titleLabel.setBounds( x + buttonsWidth, y, titleWidth, h );
+					leftPanel.setBounds( x + buttonsWidth + titleWidth, y, leftWidth, h );
 				}
 
 				// If menu bar is embedded and contains a horizontal glue component,
@@ -233,10 +285,7 @@ public class FlatTitlePane
 			@Override
 			public Dimension getPreferredSize() {
 				Dimension size = super.getPreferredSize();
-				if( buttonMaximizedHeight > 0 &&
-					window instanceof Frame &&
-					(((Frame)window).getExtendedState() & Frame.MAXIMIZED_BOTH) != 0 )
-				{
+				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 ) ) );
 				}
@@ -248,7 +297,7 @@ public class FlatTitlePane
 		if( rootPane.getWindowDecorationStyle() == JRootPane.FRAME ) {
 			// JRootPane.FRAME works only for frames (and not for dialogs)
 			// but at this time the owner window type is unknown (not yet added)
-			// so we add the iconify/maximize/restore buttons and they are shown
+			// so we add the iconify/maximize/restore buttons, and they are shown
 			// later in frameStateChanged(), which is invoked from addNotify()
 
 			buttonPanel.add( iconifyButton );
@@ -259,7 +308,13 @@ public class FlatTitlePane
 	}
 
 	protected JButton createButton( String iconKey, String accessibleName, ActionListener action ) {
-		JButton button = new JButton( UIManager.getIcon( iconKey ) );
+		JButton button = new JButton( UIManager.getIcon( iconKey ) ) {
+			@Override
+			public Dimension getMinimumSize() {
+				// allow the button to shrink if space is rare
+				return new Dimension( UIScale.scale( buttonMinimumWidth ), super.getMinimumSize().height );
+			}
+		};
 		button.setFocusable( false );
 		button.setContentAreaFilled( false );
 		button.setBorder( BorderFactory.createEmptyBorder() );
@@ -309,6 +364,7 @@ public class FlatTitlePane
 			restoreButton.setVisible( resizable && maximized );
 
 			if( maximized &&
+				!(SystemInfo.isLinux && FlatNativeLinuxLibrary.isWMUtilsSupported( window )) &&
 				rootPane.getClientProperty( "_flatlaf.maximizedBoundsUpToDate" ) == null )
 			{
 				rootPane.putClientProperty( "_flatlaf.maximizedBoundsUpToDate", null );
@@ -339,9 +395,13 @@ public class FlatTitlePane
 	}
 
 	protected void updateIcon() {
+		boolean defaultShowIcon = showIcon;
+		if( !showIconInDialogs && rootPane.getParent() instanceof JDialog )
+			defaultShowIcon = false;
+
 		// get window images
 		List<Image> images = null;
-		if( clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_ICON, showIcon ) ) {
+		if( clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_ICON, defaultShowIcon ) ) {
 			images = window.getIconImages();
 			if( images.isEmpty() ) {
 				// search in owners
@@ -356,11 +416,12 @@ public class FlatTitlePane
 		boolean hasIcon = (images != null && !images.isEmpty());
 
 		// set icon
-		iconLabel.setIcon( hasIcon ? new FlatTitlePaneIcon( images, iconSize ) : null );
+		iconLabel.setIcon( hasIcon && !showIconBesideTitle ? new FlatTitlePaneIcon( images, iconSize ) : null );
+		titleLabel.setIcon( hasIcon && showIconBesideTitle ? new FlatTitlePaneIcon( images, iconSize ) : null );
 
 		// show/hide icon
-		iconLabel.setVisible( hasIcon );
-		leftPanel.setBorder( hasIcon ? null : FlatUIUtils.nonUIResource( new FlatEmptyBorder( 0, noIconLeftGap, 0, 0 ) ) );
+		iconLabel.setVisible( hasIcon && !showIconBesideTitle );
+		leftPanel.setBorder( hasIcon && !showIconBesideTitle ? null : FlatUIUtils.nonUIResource( new FlatEmptyBorder( 0, noIconLeftGap, 0, 0 ) ) );
 
 		updateNativeTitleBarHeightAndHitTestSpotsLater();
 	}
@@ -420,7 +481,7 @@ public class FlatTitlePane
 	}
 
 	/**
-	 * Returns whether this title pane currently has an visible and embedded menubar.
+	 * Returns whether this title pane currently has a visible and embedded menubar.
 	 */
 	protected boolean hasVisibleEmbeddedMenuBar( JMenuBar menuBar ) {
 		return menuBar != null && menuBar.isVisible() && isMenuBarEmbedded();
@@ -567,6 +628,11 @@ debug*/
 			frame.setExtendedState( frame.getExtendedState() | Frame.ICONIFIED );
 	}
 
+	/** @since 2.4 */
+	protected boolean isWindowMaximized() {
+		return window instanceof Frame && (((Frame)window).getExtendedState() & Frame.MAXIMIZED_BOTH) != 0;
+	}
+
 	/**
 	 * Maximizes the window.
 	 */
@@ -615,7 +681,7 @@ debug*/
 			int maximizedWidth = screenBounds.width;
 			int maximizedHeight = screenBounds.height;
 
-			if( !isMaximizedBoundsFixed() ) {
+			if( SystemInfo.isWindows && !isMaximizedBoundsFixed() ) {
 				// on Java 8 to 14, maximized x,y are 0,0 based on all screens in a multi-screen environment
 				maximizedX = 0;
 				maximizedY = 0;
@@ -683,6 +749,17 @@ debug*/
 		}
 	}
 
+	private void maximizeOrRestore() {
+		if( !(window instanceof Frame) || !((Frame)window).isResizable() )
+			return;
+
+		Frame frame = (Frame) window;
+		if( (frame.getExtendedState() & Frame.MAXIMIZED_BOTH) != 0 )
+			restore();
+		else
+			maximize();
+	}
+
 	/**
 	 * Closes the window.
 	 */
@@ -729,7 +806,7 @@ debug*/
 		List<Rectangle> hitTestSpots = new ArrayList<>();
 		Rectangle appIconBounds = null;
 
-		if( iconLabel.isVisible() ) {
+		if( !showIconBesideTitle && iconLabel.isVisible() ) {
 			// compute real icon size (without insets; 1px larger for easier hitting)
 			Point location = SwingUtilities.convertPoint( iconLabel, 0, 0, window );
 			Insets iconInsets = iconLabel.getInsets();
@@ -741,9 +818,7 @@ debug*/
 
 			// if frame is maximized, increase icon bounds to upper-left corner
 			// of window to allow closing window via double-click in upper-left corner
-			if( window instanceof Frame &&
-				(((Frame)window).getExtendedState() & Frame.MAXIMIZED_BOTH) != 0 )
-			{
+			if( isWindowMaximized() ) {
 				iconBounds.height += iconBounds.y;
 				iconBounds.y = 0;
 
@@ -758,6 +833,38 @@ debug*/
 				hitTestSpots.add( iconBounds );
 			else
 				appIconBounds = iconBounds;
+		} else if( showIconBesideTitle && titleLabel.getIcon() != null && titleLabel.getUI() instanceof FlatTitleLabelUI ) {
+			FlatTitleLabelUI ui = (FlatTitleLabelUI) titleLabel.getUI();
+
+			// compute real icon bounds
+			Insets insets = titleLabel.getInsets();
+			Rectangle viewR = new Rectangle( insets.left, insets.top,
+				titleLabel.getWidth() - insets.left - insets.right,
+				titleLabel.getHeight() - insets.top - insets.bottom );
+			Rectangle iconR = new Rectangle();
+			Rectangle textR = new Rectangle();
+			ui.layoutCL( titleLabel, titleLabel.getFontMetrics( titleLabel.getFont() ),
+				titleLabel.getText(), titleLabel.getIcon(),
+				viewR, iconR, textR );
+
+			// Windows shows the window system menu only in the upper-left corner
+			if( iconR.x == 0 ) {
+				// convert icon location to window coordinates
+				Point location = SwingUtilities.convertPoint( titleLabel, 0, 0, window );
+				iconR.x += location.x;
+				iconR.y += location.y;
+
+				// make icon bounds 1px larger for easier hitting
+				iconR.x -= 1;
+				iconR.y -= 1;
+				iconR.width += 2;
+				iconR.height += 2;
+
+				if( hasJBRCustomDecoration() )
+					hitTestSpots.add( iconR );
+				else
+					appIconBounds = iconR;
+			}
 		}
 
 		Rectangle r = getNativeHitTestSpot( buttonPanel );
@@ -768,26 +875,41 @@ debug*/
 		if( hasVisibleEmbeddedMenuBar( menuBar ) ) {
 			r = getNativeHitTestSpot( menuBar );
 			if( r != null ) {
-				Component horizontalGlue = findHorizontalGlue( menuBar );
-				if( horizontalGlue != null ) {
-					// If menu bar is embedded and contains a horizontal glue component,
-					// then split the hit test spot into two spots so that
-					// the glue component area can used to move the window.
+				// if frame is resizable and not maximized, make menu bar hit test spot smaller at top
+				// to have a small area above the menu bar to resize the window
+				if( window instanceof Frame && ((Frame)window).isResizable() && !isWindowMaximized() ) {
+					// limit to 8, because Windows does not use a larger height
+					int resizeHeight = UIScale.scale( Math.min( menuBarResizeHeight, 8 ) );
+					r.y += resizeHeight;
+					r.height -= resizeHeight;
+				}
 
-					Point glueLocation = SwingUtilities.convertPoint( horizontalGlue, 0, 0, window );
-					int x2 = glueLocation.x + horizontalGlue.getWidth();
-					Rectangle r2;
-					if( getComponentOrientation().isLeftToRight() ) {
-						r2 = new Rectangle( x2, r.y, (r.x + r.width) - x2, r.height );
+				int count = menuBar.getComponentCount();
+				for( int i = count - 1; i >= 0; i-- ) {
+					Component c = menuBar.getComponent( i );
+					if( c instanceof Box.Filler ||
+						(c instanceof JComponent && clientPropertyBoolean( (JComponent) c, COMPONENT_TITLE_BAR_CAPTION, false ) ) )
+					{
+						// If menu bar is embedded and contains a horizontal glue or caption component,
+						// then split the hit test spot so that
+						// the glue/caption component area can be used to move the window.
 
-						r.width = glueLocation.x - r.x;
-					} else {
-						r2 = new Rectangle( r.x, r.y, glueLocation.x - r.x, r.height );
+						Point glueLocation = SwingUtilities.convertPoint( c, 0, 0, window );
+						int x2 = glueLocation.x + c.getWidth();
+						Rectangle r2;
+						if( getComponentOrientation().isLeftToRight() ) {
+							r2 = new Rectangle( x2, r.y, (r.x + r.width) - x2, r.height );
 
-						r.width = (r.x + r.width) - x2;
-						r.x = x2;
+							r.width = glueLocation.x - r.x;
+						} else {
+							r2 = new Rectangle( r.x, r.y, glueLocation.x - r.x, r.height );
+
+							r.width = (r.x + r.width) - x2;
+							r.x = x2;
+						}
+						if( r2.width > 0 )
+							hitTestSpots.add( r2 );
 					}
-					hitTestSpots.add( r2 );
 				}
 
 				hitTestSpots.add( r );
@@ -854,7 +976,7 @@ debug*/
 			} else if( borderColor != null && (rootPane.getJMenuBar() == null || !rootPane.getJMenuBar().isVisible()) )
 				insets.bottom += UIScale.scale( 1 );
 
-			if( hasNativeCustomDecoration() && !isWindowMaximized( c ) )
+			if( !SystemInfo.isWindows_11_orLater && hasNativeCustomDecoration() && !isWindowMaximized() )
 				insets = FlatUIUtils.addInsets( insets, WindowTopBorder.getInstance().getBorderInsets() );
 
 			return insets;
@@ -873,7 +995,7 @@ debug*/
 				FlatUIUtils.paintFilledRectangle( g, borderColor, x, y + height - lineHeight, width, lineHeight );
 			}
 
-			if( hasNativeCustomDecoration() && !isWindowMaximized( c ) )
+			if( !SystemInfo.isWindows_11_orLater && hasNativeCustomDecoration() && !isWindowMaximized() )
 				WindowTopBorder.getInstance().paintBorder( c, g, x, y, width, height );
 		}
 
@@ -881,12 +1003,6 @@ debug*/
 			JMenuBar menuBar = rootPane.getJMenuBar();
 			return hasVisibleEmbeddedMenuBar( menuBar ) ? menuBar.getBorder() : null;
 		}
-
-		protected boolean isWindowMaximized( Component c ) {
-			return window instanceof Frame
-				? (((Frame)window).getExtendedState() & Frame.MAXIMIZED_BOTH) != 0
-				: false;
-		}
 	}
 
 	//---- class FlatTitleLabelUI ---------------------------------------------
@@ -900,32 +1016,109 @@ debug*/
 		}
 
 		@Override
-		protected void paintEnabledText( JLabel l, Graphics g, String s, int textX, int textY ) {
-			boolean hasEmbeddedMenuBar = hasVisibleEmbeddedMenuBar( rootPane.getJMenuBar() );
-			int labelWidth = l.getWidth();
-			int textWidth = labelWidth - (textX * 2);
-			int gap = UIScale.scale( menuBarTitleGap );
+		protected void installDefaults( JLabel c ) {
+			super.installDefaults( c );
 
-			// The passed in textX coordinate is always to horizontally center the text within the label bounds.
-			// Modify textX so that the text is painted either centered within the window bounds or leading aligned.
-			boolean center = hasEmbeddedMenuBar ? centerTitleIfMenuBarEmbedded : centerTitle;
-			if( center ) {
-				// If window is wide enough, center title within window bounds.
-				// Otherwise leave it centered within free space (label bounds).
-				int centeredTextX = ((l.getParent().getWidth() - textWidth) / 2) - l.getX();
-				if( centeredTextX >= gap && centeredTextX + textWidth <= labelWidth - gap )
-					textX = centeredTextX;
-			} else {
-				// leading aligned
-				boolean leftToRight = getComponentOrientation().isLeftToRight();
-				Insets insets = l.getInsets();
-				int leadingInset = hasEmbeddedMenuBar ? gap : (leftToRight ? insets.left : insets.right);
-				int leadingTextX = leftToRight ? leadingInset : labelWidth - leadingInset - textWidth;
-				if( leftToRight ? leadingTextX < textX : leadingTextX > textX )
-					textX = leadingTextX;
+			if( titleFont != null )
+				c.setFont( titleFont );
+		}
+
+		@Override
+		protected String layoutCL( JLabel label, FontMetrics fontMetrics, String text, Icon icon,
+			Rectangle viewR, Rectangle iconR, Rectangle textR )
+		{
+			JMenuBar menuBar = rootPane.getJMenuBar();
+			boolean hasEmbeddedMenuBar = hasVisibleEmbeddedMenuBar( menuBar );
+			boolean hasEmbeddedLeadingMenus = hasEmbeddedMenuBar && hasLeadingMenus( menuBar );
+			boolean leftToRight = getComponentOrientation().isLeftToRight();
+
+			if( hasEmbeddedMenuBar ) {
+				int minGap = UIScale.scale( menuBarTitleMinimumGap );
+
+				// apply minimum leading gap (between embedded menu bar and title)
+				if( hasEmbeddedLeadingMenus ) {
+					if( leftToRight )
+						viewR.x += minGap;
+					viewR.width -= minGap;
+				}
+
+				// apply minimum trailing gap (between title and right aligned components of embedded menu bar)
+				Component horizontalGlue = findHorizontalGlue( menuBar );
+				if( horizontalGlue != null && menuBar.getComponent( menuBar.getComponentCount() - 1 ) != horizontalGlue ) {
+					if( !leftToRight )
+						viewR.x += minGap;
+					viewR.width -= minGap;
+				}
 			}
 
-			super.paintEnabledText( l, g, s, textX, textY );
+			// compute icon width and gap (if icon is show besides the title)
+			int iconTextGap = 0;
+			int iconWidthAndGap = 0;
+			if( icon != null ) {
+				Insets iconInsets = iconLabel.getInsets();
+				iconTextGap = leftToRight ? iconInsets.right : iconInsets.left;
+				iconWidthAndGap = icon.getIconWidth() + iconTextGap;
+			}
+
+			// layout title and icon (if show besides the title)
+			String clippedText = SwingUtilities.layoutCompoundLabel( label, fontMetrics, text, icon,
+				label.getVerticalAlignment(), label.getHorizontalAlignment(),
+				label.getVerticalTextPosition(), label.getHorizontalTextPosition(),
+				viewR, iconR, textR,
+				iconTextGap );
+
+			// compute text X location
+			if( !clippedText.equals( text ) ) {
+				// if text is clipped, align to left (or right)
+				textR.x = leftToRight
+					? viewR.x + iconWidthAndGap
+					: viewR.x + viewR.width - iconWidthAndGap - textR.width;
+			} else {
+				int leadingGap = hasEmbeddedLeadingMenus ? UIScale.scale( menuBarTitleGap - menuBarTitleMinimumGap ) : 0;
+
+				boolean center = hasEmbeddedLeadingMenus ? centerTitleIfMenuBarEmbedded : centerTitle;
+				if( center ) {
+					// If window is wide enough, center title within window bounds.
+					// Otherwise, center within free space (label bounds).
+					Container parent = label.getParent();
+					int centeredTextX = (parent != null) ? ((parent.getWidth() - textR.width - iconWidthAndGap) / 2) + iconWidthAndGap - label.getX() : -1;
+					textR.x = (centeredTextX >= viewR.x + leadingGap && centeredTextX + textR.width <= viewR.x + viewR.width - leadingGap)
+						? centeredTextX
+						: viewR.x + ((viewR.width - textR.width - iconWidthAndGap) / 2) + iconWidthAndGap;
+				} else {
+					// leading aligned with leading gap, which is reduced if space is rare
+					textR.x = leftToRight
+						? Math.min( viewR.x + leadingGap + iconWidthAndGap, viewR.x + viewR.width - textR.width )
+						: Math.max( viewR.x + viewR.width - leadingGap - iconWidthAndGap - textR.width, viewR.x );
+				}
+			}
+
+			// compute icon X location (relative to text X location)
+			if( icon != null ) {
+				iconR.x = leftToRight
+					? textR.x - iconWidthAndGap
+					: textR.x + textR.width + iconTextGap;
+			}
+
+			return clippedText;
+		}
+
+		private boolean hasLeadingMenus( JMenuBar menuBar ) {
+			// check whether menu bar is empty
+			if( menuBar.getComponentCount() == 0 || menuBar.getWidth() == 0 )
+				return false;
+
+			// check whether menu bar has a leading glue component
+			// (no menus/components at left side)
+			Component horizontalGlue = findHorizontalGlue( menuBar );
+			if( horizontalGlue != null ) {
+				boolean leftToRight = getComponentOrientation().isLeftToRight();
+				if( (leftToRight && horizontalGlue.getX() == 0) ||
+					(!leftToRight && horizontalGlue.getX() + horizontalGlue.getWidth() == menuBar.getWidth()) )
+				  return false;
+			}
+
+			return true;
 		}
 	}
 
@@ -966,7 +1159,7 @@ debug*/
 			activeChanged( true );
 			updateNativeTitleBarHeightAndHitTestSpots();
 
-			if( hasNativeCustomDecoration() )
+			if( !SystemInfo.isWindows_11_orLater && hasNativeCustomDecoration() )
 				WindowTopBorder.getInstance().repaintBorder( FlatTitlePane.this );
 
 			repaintWindowBorder();
@@ -977,7 +1170,7 @@ debug*/
 			activeChanged( false );
 			updateNativeTitleBarHeightAndHitTestSpots();
 
-			if( hasNativeCustomDecoration() )
+			if( !SystemInfo.isWindows_11_orLater && hasNativeCustomDecoration() )
 				WindowTopBorder.getInstance().repaintBorder( FlatTitlePane.this );
 
 			repaintWindowBorder();
@@ -992,23 +1185,30 @@ debug*/
 		//---- interface MouseListener ----
 
 		private Point dragOffset;
+		private boolean nativeMove;
+		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 thru for some reason
+			if( 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( e.getSource() == iconLabel ) {
 					// double-click on icon closes window
 					close();
-				} else if( !hasNativeCustomDecoration() &&
-					window instanceof Frame &&
-					((Frame)window).isResizable() )
-				{
+				} else if( !hasNativeCustomDecoration() ) {
 					// maximize/restore on double-click
-					Frame frame = (Frame) window;
-					if( (frame.getExtendedState() & Frame.MAXIMIZED_BOTH) != 0 )
-						restore();
-					else
-						maximize();
+					maximizeOrRestore();
 				}
 			}
 		}
@@ -1018,7 +1218,56 @@ debug*/
 			if( window == null )
 				return; // should newer occur
 
+			// on Linux, show window menu
+			if( SwingUtilities.isRightMouseButton( e ) &&
+				SystemInfo.isLinux && FlatNativeLinuxLibrary.isWMUtilsSupported( window ) )
+			{
+				e.consume();
+				FlatNativeLinuxLibrary.showWindowMenu( window, e );
+				return;
+			}
+
+			if( !SwingUtilities.isLeftMouseButton( e ) )
+				return;
+
 			dragOffset = SwingUtilities.convertPoint( FlatTitlePane.this, e.getPoint(), window );
+			nativeMove = 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();
+						nativeMove = 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 ) {}
@@ -1029,9 +1278,15 @@ debug*/
 
 		@Override
 		public void mouseDragged( MouseEvent e ) {
-			if( window == null )
+			if( window == null || dragOffset == null )
 				return; // should newer occur
 
+			if( nativeMove )
+				return;
+
+			if( !SwingUtilities.isLeftMouseButton( e ) )
+				return;
+
 			if( hasNativeCustomDecoration() )
 				return; // do nothing if having native window border
 

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

@@ -21,12 +21,8 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.Graphics;
 import java.beans.PropertyChangeEvent;
-import java.util.Iterator;
 import java.util.Map;
-import javax.swing.AbstractButton;
-import javax.swing.JComponent;
-import javax.swing.JToggleButton;
-import javax.swing.UIManager;
+import javax.swing.*;
 import javax.swing.plaf.ComponentUI;
 import com.formdev.flatlaf.ui.FlatStylingSupport.Styleable;
 import com.formdev.flatlaf.ui.FlatStylingSupport.UnknownStyleException;
@@ -52,15 +48,29 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault ToggleButton.iconTextGap					int
  * @uiDefault ToggleButton.startBackground				Color	optional; if set, a gradient paint is used and ToggleButton.background is ignored
  * @uiDefault ToggleButton.endBackground				Color	optional; if set, a gradient paint is used
- * @uiDefault ToggleButton.pressedBackground			Color
+ * @uiDefault ToggleButton.focusedBackground			Color	optional
+ * @uiDefault ToggleButton.focusedForeground			Color	optional
+ * @uiDefault ToggleButton.hoverBackground				Color	optional
+ * @uiDefault ToggleButton.hoverForeground				Color	optional
+ * @uiDefault ToggleButton.pressedBackground			Color	optional
+ * @uiDefault ToggleButton.pressedForeground			Color	optional
  * @uiDefault ToggleButton.selectedBackground			Color
  * @uiDefault ToggleButton.selectedForeground			Color
  * @uiDefault ToggleButton.disabledBackground			Color	optional
  * @uiDefault ToggleButton.disabledText					Color
  * @uiDefault ToggleButton.disabledSelectedBackground	Color
+ * @uiDefault ToggleButton.disabledSelectedForeground	Color	optional
+ * @uiDefault Button.paintShadow						boolean	default is false
+ * @uiDefault Button.shadowWidth						int		default is 2
+ * @uiDefault Button.shadowColor						Color	optional
  * @uiDefault ToggleButton.toolbar.hoverBackground		Color
+ * @uiDefault ToggleButton.toolbar.hoverForeground		Color	optional
  * @uiDefault ToggleButton.toolbar.pressedBackground	Color
+ * @uiDefault ToggleButton.toolbar.pressedForeground	Color	optional
  * @uiDefault ToggleButton.toolbar.selectedBackground	Color
+ * @uiDefault ToggleButton.toolbar.selectedForeground	Color	optional
+ * @uiDefault ToggleButton.toolbar.disabledSelectedBackground	Color	optional
+ * @uiDefault ToggleButton.toolbar.disabledSelectedForeground	Color	optional
  *
  * <!-- FlatToggleButtonUI -->
  *
@@ -68,8 +78,11 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault ToggleButton.tab.underlineColor			Color
  * @uiDefault ToggleButton.tab.disabledUnderlineColor	Color
  * @uiDefault ToggleButton.tab.selectedBackground		Color	optional
+ * @uiDefault ToggleButton.tab.selectedForeground		Color	optional
  * @uiDefault ToggleButton.tab.hoverBackground			Color
+ * @uiDefault ToggleButton.tab.hoverForeground			Color	optional
  * @uiDefault ToggleButton.tab.focusBackground			Color
+ * @uiDefault ToggleButton.tab.focusForeground			Color	optional
  *
  *
  * @author Karl Tauber
@@ -81,8 +94,11 @@ public class FlatToggleButtonUI
 	@Styleable(dot=true) protected Color tabUnderlineColor;
 	@Styleable(dot=true) protected Color tabDisabledUnderlineColor;
 	@Styleable(dot=true) protected Color tabSelectedBackground;
+	/** @since 2.3 */ @Styleable(dot=true) protected Color tabSelectedForeground;
 	@Styleable(dot=true) protected Color tabHoverBackground;
+	/** @since 2.3 */ @Styleable(dot=true) protected Color tabHoverForeground;
 	@Styleable(dot=true) protected Color tabFocusBackground;
+	/** @since 2.3 */ @Styleable(dot=true) protected Color tabFocusForeground;
 
 	private boolean defaults_initialized = false;
 
@@ -115,8 +131,11 @@ public class FlatToggleButtonUI
 			tabUnderlineColor = UIManager.getColor( "ToggleButton.tab.underlineColor" );
 			tabDisabledUnderlineColor = UIManager.getColor( "ToggleButton.tab.disabledUnderlineColor" );
 			tabSelectedBackground = UIManager.getColor( "ToggleButton.tab.selectedBackground" );
+			tabSelectedForeground = UIManager.getColor( "ToggleButton.tab.selectedForeground" );
 			tabHoverBackground = UIManager.getColor( "ToggleButton.tab.hoverBackground" );
+			tabHoverForeground = UIManager.getColor( "ToggleButton.tab.hoverForeground" );
 			tabFocusBackground = UIManager.getColor( "ToggleButton.tab.focusBackground" );
+			tabFocusForeground = UIManager.getColor( "ToggleButton.tab.focusForeground" );
 
 			defaults_initialized = true;
 		}
@@ -143,6 +162,7 @@ public class FlatToggleButtonUI
 				b.repaint();
 				break;
 
+			case TAB_BUTTON_UNDERLINE_PLACEMENT:
 			case TAB_BUTTON_UNDERLINE_HEIGHT:
 			case TAB_BUTTON_UNDERLINE_COLOR:
 			case TAB_BUTTON_SELECTED_BACKGROUND:
@@ -164,11 +184,7 @@ public class FlatToggleButtonUI
 	@Override
 	public Map<String, Class<?>> getStyleableInfos( JComponent c ) {
 		Map<String, Class<?>> infos = super.getStyleableInfos( c );
-		Iterator<String> it = infos.keySet().iterator();
-		while( it.hasNext() ) {
-			if( it.next().startsWith( "help." ) )
-				it.remove();
-		}
+		infos.keySet().removeIf( s -> s.startsWith( "help." ) );
 		return infos;
 	}
 
@@ -201,13 +217,42 @@ public class FlatToggleButtonUI
 
 			// paint underline if selected
 			if( selected ) {
-				int underlineHeight = UIScale.scale( clientPropertyInt( c, TAB_BUTTON_UNDERLINE_HEIGHT, tabUnderlineHeight ) );
+				int underlineThickness = UIScale.scale( clientPropertyInt( c, TAB_BUTTON_UNDERLINE_HEIGHT, tabUnderlineHeight ) );
 				g.setColor( c.isEnabled()
 					? clientPropertyColor( c, TAB_BUTTON_UNDERLINE_COLOR, tabUnderlineColor )
 					: tabDisabledUnderlineColor );
-				g.fillRect( 0, height - underlineHeight, width, underlineHeight );
+				int placement = clientPropertyInt( c, TAB_BUTTON_UNDERLINE_PLACEMENT, SwingConstants.BOTTOM );
+				switch (placement) {
+					case SwingConstants.TOP:
+						g.fillRect( 0, 0, width, underlineThickness );
+						break;
+					case SwingConstants.LEFT:
+						g.fillRect( 0, 0, underlineThickness, height );
+						break;
+					case SwingConstants.RIGHT:
+						g.fillRect( width - underlineThickness, 0, underlineThickness, height );
+						break;
+					case SwingConstants.BOTTOM:
+					default:
+						g.fillRect( 0, height - underlineThickness, width, underlineThickness );
+				}
 			}
 		} else
 			super.paintBackground( g, c );
 	}
+
+	@Override
+	protected Color getForeground( JComponent c ) {
+		if( isTabButton( c ) ) {
+			if( !c.isEnabled() )
+				return disabledText;
+
+			if( tabSelectedForeground != null && ((AbstractButton)c).isSelected() )
+				return tabSelectedForeground;
+
+			return buttonStateColor( c, c.getForeground(), disabledText,
+				tabFocusForeground, tabHoverForeground, null );
+		} else
+			return super.getForeground( c );
+	}
 }

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

@@ -22,6 +22,7 @@ import java.awt.Dimension;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.geom.Rectangle2D;
+import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.util.Map;
 import javax.swing.JComponent;
@@ -31,6 +32,7 @@ import javax.swing.SwingConstants;
 import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 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.LoggingFacade;
@@ -47,7 +49,7 @@ import com.formdev.flatlaf.util.LoggingFacade;
  */
 public class FlatToolBarSeparatorUI
 	extends BasicToolBarSeparatorUI
-	implements StyleableUI
+	implements StyleableUI, PropertyChangeListener
 {
 	private static final int LINE_WIDTH = 1;
 
@@ -56,7 +58,6 @@ public class FlatToolBarSeparatorUI
 
 	private final boolean shared;
 	private boolean defaults_initialized = false;
-	private PropertyChangeListener propertyChangeListener;
 	private Map<String, Object> oldStyleValues;
 
 	public static ComponentUI createUI( JComponent c ) {
@@ -105,28 +106,33 @@ public class FlatToolBarSeparatorUI
 	protected void installListeners( JSeparator s ) {
 		super.installListeners( s );
 
-		propertyChangeListener = FlatStylingSupport.createPropertyChangeListener(
-			s, () -> stylePropertyChange( s ), null );
-		s.addPropertyChangeListener( propertyChangeListener );
+		s.addPropertyChangeListener( this );
 	}
 
 	@Override
 	protected void uninstallListeners( JSeparator s ) {
 		super.uninstallListeners( s );
 
-		s.removePropertyChangeListener( propertyChangeListener );
-		propertyChangeListener = null;
+		s.removePropertyChangeListener( this );
 	}
 
-	private void stylePropertyChange( JSeparator s ) {
-		if( shared && FlatStylingSupport.hasStyleProperty( s ) ) {
-			// unshare component UI if necessary
-			// updateUI() invokes installStyle() from installUI()
-			s.updateUI();
-		} else
-			installStyle( s );
-		s.revalidate();
-		s.repaint();
+	/** @since 2.0.1 */
+	@Override
+	public void propertyChange( PropertyChangeEvent e ) {
+		switch( e.getPropertyName() ) {
+			case FlatClientProperties.STYLE:
+			case FlatClientProperties.STYLE_CLASS:
+				JSeparator s = (JSeparator) e.getSource();
+				if( shared && FlatStylingSupport.hasStyleProperty( s ) ) {
+					// unshare component UI if necessary
+					// updateUI() invokes installStyle() from installUI()
+					s.updateUI();
+				} else
+					installStyle( s );
+				s.revalidate();
+				s.repaint();
+				break;
+		}
 	}
 
 	/** @since 2 */
@@ -154,6 +160,12 @@ public class FlatToolBarSeparatorUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	@Override
 	public Dimension getPreferredSize( JComponent c ) {
 		Dimension size = ((JToolBar.Separator)c).getSeparatorSize();

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

@@ -201,6 +201,12 @@ public class FlatToolBarUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	/** @since 1.4 */
 	protected void setButtonsFocusable( boolean focusable ) {
 		for( Component c : toolBar.getComponents() )
@@ -256,11 +262,15 @@ public class FlatToolBarUI
 			default: return;
 		}
 
-		for( int i = focusedCompIndex + add; i != focusedCompIndex; i += add ) {
+		int i = focusedCompIndex;
+		for(;;) {
+			i += add;
 			if( i < 0 )
 				i = count - 1;
 			else if( i >= count )
 				i = 0;
+			if( i == focusedCompIndex )
+				break;
 
 			Component c = toolBar.getComponentAtIndex( i );
 			if( canBeFocusOwner( c ) ) {
@@ -282,7 +292,7 @@ public class FlatToolBarUI
 			return comboBox.getUI().isFocusTraversable( comboBox );
 		}
 
-		// check whether component has a empty input map to skip components that
+		// check whether component has an empty input map to skip components that
 		// are focusable, but do nothing when focused (e.g. JLabel)
 		// see LayoutFocusTraversalPolicy.accept()
 		if( c instanceof JComponent ) {

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

@@ -21,6 +21,7 @@ import java.awt.FontMetrics;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Insets;
+import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.util.List;
 import javax.swing.JComponent;
@@ -49,9 +50,8 @@ import com.formdev.flatlaf.util.StringUtils;
  */
 public class FlatToolTipUI
 	extends BasicToolTipUI
+	implements PropertyChangeListener
 {
-	private static PropertyChangeListener sharedPropertyChangedListener;
-
 	public static ComponentUI createUI( JComponent c ) {
 		return FlatUIUtils.createSharedUI( FlatToolTipUI.class, FlatToolTipUI::new );
 	}
@@ -68,24 +68,24 @@ public class FlatToolTipUI
 	protected void installListeners( JComponent c ) {
 		super.installListeners( c );
 
-		if( sharedPropertyChangedListener == null ) {
-			sharedPropertyChangedListener = e -> {
-				String name = e.getPropertyName();
-				if( name == "tiptext" || name == "font" || name == "foreground" ) {
-					JToolTip toolTip = (JToolTip) e.getSource();
-					FlatLabelUI.updateHTMLRenderer( toolTip, toolTip.getTipText(), false );
-				}
-			};
-		}
-
-		c.addPropertyChangeListener( sharedPropertyChangedListener );
+		c.addPropertyChangeListener( this );
 	}
 
 	@Override
 	protected void uninstallListeners( JComponent c ) {
 		super.uninstallListeners( c );
 
-		c.removePropertyChangeListener( sharedPropertyChangedListener );
+		c.removePropertyChangeListener( this );
+	}
+
+	/** @since 2.0.1 */
+	@Override
+	public void propertyChange( PropertyChangeEvent e ) {
+		String name = e.getPropertyName();
+		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

@@ -340,6 +340,12 @@ public class FlatTreeUI
 		return FlatStylingSupport.getAnnotatedStyleableInfos( this );
 	}
 
+	/** @since 2.5 */
+	@Override
+	public Object getStyleableValue( JComponent c, String key ) {
+		return FlatStylingSupport.getAnnotatedStyleableValue( this, key );
+	}
+
 	/**
 	 * Same as super.paintRow(), but supports wide selection and uses
 	 * inactive selection background/foreground if tree is not focused.

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

@@ -33,6 +33,7 @@ import java.awt.Rectangle;
 import java.awt.RenderingHints;
 import java.awt.Shape;
 import java.awt.Stroke;
+import java.awt.SystemColor;
 import java.awt.Window;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
@@ -45,20 +46,27 @@ import java.util.WeakHashMap;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
 import javax.swing.JComponent;
+import javax.swing.JScrollPane;
 import javax.swing.JTable;
+import javax.swing.JTextField;
 import javax.swing.LookAndFeel;
 import javax.swing.SwingConstants;
 import javax.swing.SwingUtilities;
+import javax.swing.UIDefaults;
 import javax.swing.UIManager;
 import javax.swing.border.Border;
 import javax.swing.border.CompoundBorder;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
 import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.FlatIntelliJLaf;
+import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.FlatLightLaf;
 import com.formdev.flatlaf.FlatSystemProperties;
 import com.formdev.flatlaf.util.DerivedColor;
 import com.formdev.flatlaf.util.Graphics2DProxy;
 import com.formdev.flatlaf.util.HiDPIUtils;
+import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -71,7 +79,7 @@ public class FlatUIUtils
 	public static final boolean MAC_USE_QUARTZ = Boolean.getBoolean( "apple.awt.graphics.UseQuartz" );
 
 	private static boolean useSharedUIs = true;
-	private static WeakHashMap<LookAndFeel, IdentityHashMap<Object, ComponentUI>> sharedUIinstances = new WeakHashMap<>();
+	private static final WeakHashMap<LookAndFeel, IdentityHashMap<Object, ComponentUI>> sharedUIinstances = new WeakHashMap<>();
 
 	public static Rectangle addInsets( Rectangle r, Insets insets ) {
 		return new Rectangle(
@@ -241,16 +249,53 @@ public class FlatUIUtils
 			}
 		}
 
+		// invoke hasFocus() here because components may have overridden this method
+		// (e.g. Swing delegate components used for AWT components on macOS)
+		if( c.hasFocus() )
+			return true;
+
 		return keyboardFocusManager.getPermanentFocusOwner() == c &&
 			isInActiveWindow( c, keyboardFocusManager.getActiveWindow() );
 	}
 
-	private static boolean isInActiveWindow( Component c, Window activeWindow ) {
+	static boolean isInActiveWindow( Component c, Window activeWindow ) {
 		Window window = SwingUtilities.windowForComponent( c );
 		return window == activeWindow ||
 			(window != null && window.getType() == Window.Type.POPUP && window.getOwner() == activeWindow);
 	}
 
+	static boolean isAWTPeer( Component c ) {
+		// on macOS, Swing components are used for AWT components
+		if( SystemInfo.isMacOS )
+			return c.getClass().getName().startsWith( "sun.lwawt.LW" );
+		return false;
+	}
+
+	/**
+	 * Checks whether component is used as peer for AWT (on macOS) and
+	 * whether a dark FlatLaf theme is active, which requires special handling
+	 * because AWT always uses light colors.
+	 */
+	static boolean needsLightAWTPeer( JComponent c ) {
+		return FlatUIUtils.isAWTPeer( c ) && FlatLaf.isLafDark();
+	}
+
+	private static UIDefaults lightAWTPeerDefaults;
+
+	static void runWithLightAWTPeerUIDefaults( Runnable runnable ) {
+		if( lightAWTPeerDefaults == null ) {
+			FlatLaf lightLaf = UIManager.getInt( "Component.focusWidth" ) >= 2
+				? new FlatIntelliJLaf()
+				: new FlatLightLaf();
+			lightAWTPeerDefaults = lightLaf.getDefaults();
+		}
+
+		FlatLaf.runWithUIDefaultsGetter( key -> {
+			Object value = lightAWTPeerDefaults.get( key );
+			return (value != null) ? value : FlatLaf.NULL_VALUE;
+		}, runnable );
+	}
+
 	/**
 	 * Returns whether the given component is in a window that is in full-screen mode.
 	 */
@@ -335,7 +380,7 @@ public class FlatUIUtils
 	 */
 	public static Object[] setRenderingHints( Graphics g ) {
 		Graphics2D g2 = (Graphics2D) g;
-		Object[] oldRenderingHints = new Object[] {
+		Object[] oldRenderingHints = {
 			g2.getRenderingHint( RenderingHints.KEY_ANTIALIASING ),
 			g2.getRenderingHint( RenderingHints.KEY_STROKE_CONTROL ),
 		};
@@ -352,8 +397,10 @@ public class FlatUIUtils
 	 */
 	public static void resetRenderingHints( Graphics g, Object[] oldRenderingHints ) {
 		Graphics2D g2 = (Graphics2D) g;
-		g2.setRenderingHint( RenderingHints.KEY_ANTIALIASING, oldRenderingHints[0] );
-		g2.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, oldRenderingHints[1] );
+		if( oldRenderingHints[0] != null )
+			g2.setRenderingHint( RenderingHints.KEY_ANTIALIASING, oldRenderingHints[0] );
+		if( oldRenderingHints[1] != null )
+			g2.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, oldRenderingHints[1] );
 	}
 
 	/**
@@ -376,7 +423,7 @@ public class FlatUIUtils
 		}
 
 		Graphics2D g2 = (Graphics2D) g;
-		Object[] oldRenderingHints2 = new Object[] {
+		Object[] oldRenderingHints2 = {
 			g2.getRenderingHint( RenderingHints.KEY_ANTIALIASING ),
 			g2.getRenderingHint( RenderingHints.KEY_STROKE_CONTROL ),
 		};
@@ -664,9 +711,9 @@ public class FlatUIUtils
 	 * is smaller than its bounds (for the focus decoration).
 	 */
 	public static void paintParentBackground( Graphics g, JComponent c ) {
-		Container parent = findOpaqueParent( c );
-		if( parent != null ) {
-			g.setColor( parent.getBackground() );
+		Color background = getParentBackground( c );
+		if( background != null ) {
+			g.setColor( background );
 			g.fillRect( 0, 0, c.getWidth(), c.getHeight() );
 		}
 	}
@@ -676,9 +723,20 @@ public class FlatUIUtils
 	 */
 	public static Color getParentBackground( JComponent c ) {
 		Container parent = findOpaqueParent( c );
-		return (parent != null)
-			? parent.getBackground()
-			: UIManager.getColor( "Panel.background" ); // fallback, probably never used
+		// parent.getBackground() may return null
+		// (e.g. for Swing delegate components used for AWT components on macOS)
+		Color background = (parent != null) ? parent.getBackground() : null;
+		if( background != null )
+			return background;
+
+		if( isAWTPeer( c ) ) {
+			// AWT peers usually use component background, except for TextField and ScrollPane
+			return c instanceof JTextField || c instanceof JScrollPane || c.getBackground() == null
+				? SystemColor.window
+				: c.getBackground();
+		}
+
+		return UIManager.getColor( "Panel.background" );
 	}
 
 	/**
@@ -777,8 +835,8 @@ public class FlatUIUtils
 	 *        {@link SwingConstants#WEST} or {@link SwingConstants#EAST})
 	 * @param chevron {@code true} for chevron arrow, {@code false} for triangle arrow
 	 * @param arrowSize the width of the painted arrow (for vertical direction) (will be scaled)
-	 * @param xOffset a offset added to the x coordinate of the arrow to paint it out-of-center. Usually zero. (will be scaled)
-	 * @param yOffset a offset added to the y coordinate of the arrow to paint it out-of-center. Usually zero. (will be scaled)
+	 * @param xOffset an offset added to the x coordinate of the arrow to paint it out-of-center. Usually zero. (will be scaled)
+	 * @param yOffset an offset added to the y coordinate of the arrow to paint it out-of-center. Usually zero. (will be scaled)
 	 *
 	 * @since 1.1
 	 */
@@ -786,13 +844,15 @@ public class FlatUIUtils
 		int direction, boolean chevron, int arrowSize, float xOffset, float yOffset )
 	{
 		// compute arrow width/height
-		int aw = UIScale.scale( arrowSize + (chevron ? 0 : 1) );
-		int ah = UIScale.scale( (arrowSize / 2) + (chevron ? 0 : 1) );
+		// - make chevron arrows one pixel smaller because coordinates are based on center of pixels (0.5/0.5)
+		// - make triangle arrows one pixel taller (and round height up) to make them look stronger
+		float aw = UIScale.scale( arrowSize + (chevron ? -1 : 0) );
+		float ah = chevron ? (aw / 2) : UIScale.scale( (arrowSize / 2) + 1 );
 
 		// rotate arrow width/height for horizontal directions
 		boolean vert = (direction == SwingConstants.NORTH || direction == SwingConstants.SOUTH);
 		if( !vert ) {
-			int temp = aw;
+			float temp = aw;
 			aw = ah;
 			ah = temp;
 		}
@@ -804,19 +864,19 @@ public class FlatUIUtils
 		// compute arrow location
 		float ox = ((width - (aw + extra)) / 2f) + UIScale.scale( xOffset );
 		float oy = ((height - (ah + extra)) / 2f) + UIScale.scale( yOffset );
-		int ax = x + ((direction == SwingConstants.WEST) ? -Math.round( -ox ) : Math.round( ox ));
-		int ay = y + ((direction == SwingConstants.NORTH) ? -Math.round( -oy ) : Math.round( oy ));
+		float ax = x + ((direction == SwingConstants.WEST) ? -Math.round( -(ox + aw) ) - aw : Math.round( ox ));
+		float ay = y + ((direction == SwingConstants.NORTH) ? -Math.round( -(oy + ah) ) - ah : Math.round( oy ));
 
 		// paint arrow
 		g.translate( ax, ay );
 /*debug
-		debugPaintArrow( g, Color.red, vert, aw + extra, ah + extra );
+		debugPaintArrow( g, Color.red, vert, Math.round( aw + extra ), Math.round( ah + extra ) );
 debug*/
 		Shape arrowShape = createArrowShape( direction, chevron, aw, ah );
 		if( chevron ) {
 			Stroke oldStroke = g.getStroke();
 			g.setStroke( new BasicStroke( UIScale.scale( 1f ) ) );
-			g.draw( arrowShape );
+			drawShapePure( g, arrowShape );
 			g.setStroke( oldStroke );
 		} else {
 			// triangle
@@ -828,7 +888,7 @@ debug*/
 	/**
 	 * Creates a chevron or triangle arrow shape for the given direction and size.
 	 * <p>
-	 * The chevron shape is a open path that can be painted with {@link Graphics2D#draw(Shape)}.
+	 * The chevron shape is an open path that can be painted with {@link Graphics2D#draw(Shape)}.
 	 * The triangle shape is a close path that can be painted with {@link Graphics2D#fill(Shape)}.
 	 *
 	 * @param direction the arrow direction ({@link SwingConstants#NORTH}, {@link SwingConstants#SOUTH}
@@ -880,7 +940,7 @@ debug*/
 	}
 
 	/**
-	 * Creates a open or closed path for the given points.
+	 * Creates an open or closed path for the given points.
 	 */
 	public static Path2D createPath( boolean close, double... points ) {
 		Path2D path = new Path2D.Float();
@@ -892,6 +952,23 @@ debug*/
 		return path;
 	}
 
+	/**
+	 * Draws the given shape with disabled stroke normalization.
+	 * The x/y coordinates of the shape are translated by a half pixel.
+	 *
+	 * @since 2.1
+	 */
+	public static void drawShapePure( Graphics2D g, Shape shape ) {
+		Object oldStrokeControl = g.getRenderingHint( RenderingHints.KEY_STROKE_CONTROL );
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE );
+
+		g.translate( 0.5, 0.5 );
+		g.draw( shape );
+		g.translate( -0.5, -0.5 );
+
+		g.setRenderingHint( RenderingHints.KEY_STROKE_CONTROL, oldStrokeControl );
+	}
+
 	/**
 	 * Draws the given string at the specified location.
 	 * The provided component is used to query text properties and anti-aliasing hints.

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

@@ -18,8 +18,8 @@ package com.formdev.flatlaf.ui;
 
 import java.awt.Component;
 import java.awt.Graphics;
+import java.lang.reflect.Method;
 import javax.swing.JComponent;
-import javax.swing.JTable;
 import javax.swing.JViewport;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicViewportUI;
@@ -43,15 +43,28 @@ public class FlatViewportUI
 	}
 
 	@Override
-	public void update( Graphics g, JComponent c ) {
-		Component view = ((JViewport)c).getView();
-		if( c.isOpaque() && view instanceof JTable ) {
-			// paint viewport background in same color as table background
-			g.setColor( view.getBackground() );
-			g.fillRect( 0, 0, c.getWidth(), c.getHeight() );
+	public void paint( Graphics g, JComponent c ) {
+		super.paint( g, c );
 
-			paint( g, c );
-		} else
-			super.update( g, c );
+		Component view = ((JViewport)c).getView();
+		if( view instanceof JComponent ) {
+			try {
+				Method m = view.getClass().getMethod( "getUI" );
+				Object ui = m.invoke( view );
+				if( ui instanceof ViewportPainter )
+					((ViewportPainter)ui).paintViewport( g, (JComponent) view, (JViewport) c );
+			} catch( Exception ex ) {
+				// ignore
+			}
+		}
+	}
+
+	//---- interface ViewportPainter ------------------------------------------
+
+	/**
+	 * @since 2.3
+	 */
+	public interface ViewportPainter {
+		void paintViewport( Graphics g, JComponent c, JViewport viewport );
 	}
 }

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

@@ -23,6 +23,7 @@ import java.awt.Dialog;
 import java.awt.Dimension;
 import java.awt.Frame;
 import java.awt.Graphics;
+import java.awt.GraphicsConfiguration;
 import java.awt.Insets;
 import java.awt.Rectangle;
 import java.awt.Toolkit;
@@ -42,7 +43,9 @@ import javax.swing.JComponent;
 import javax.swing.JInternalFrame;
 import javax.swing.JLayeredPane;
 import javax.swing.JRootPane;
+import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
+import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
 
 /**
@@ -231,8 +234,15 @@ public abstract class FlatWindowResizer
 	{
 		protected Window window;
 
+		private final boolean limitResizeToScreenBounds;
+
 		public WindowResizer( JRootPane rootPane ) {
 			super( rootPane );
+
+			// 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
@@ -289,11 +299,19 @@ public abstract class FlatWindowResizer
 
 		@Override
 		protected boolean limitToParentBounds() {
-			return false;
+			return limitResizeToScreenBounds && window != null;
 		}
 
 		@Override
 		protected Rectangle getParentBounds() {
+			if( limitResizeToScreenBounds && window != null ) {
+				GraphicsConfiguration gc = window.getGraphicsConfiguration();
+				Rectangle bounds = gc.getBounds();
+				Insets insets = window.getToolkit().getScreenInsets( gc );
+				return new Rectangle( bounds.x + insets.left, bounds.y + insets.top,
+					bounds.width - insets.left - insets.right,
+					bounds.height - insets.top - insets.bottom );
+			}
 			return null;
 		}
 
@@ -385,7 +403,7 @@ public abstract class FlatWindowResizer
 
 		@Override
 		protected Rectangle getParentBounds() {
-			return getFrame().getParent().getBounds();
+			return new Rectangle( getFrame().getParent().getSize() );
 		}
 
 		@Override
@@ -504,7 +522,7 @@ debug*/
 
 		@Override
 		public void mousePressed( MouseEvent e ) {
-			if( !isWindowResizable() )
+			if( !SwingUtilities.isLeftMouseButton( e ) || !isWindowResizable() )
 				return;
 
 			int xOnScreen = e.getXOnScreen();
@@ -533,7 +551,7 @@ debug*/
 
 		@Override
 		public void mouseReleased( MouseEvent e ) {
-			if( !isWindowResizable() )
+			if( !SwingUtilities.isLeftMouseButton( e ) || !isWindowResizable() )
 				return;
 
 			dragLeftOffset = dragRightOffset = dragTopOffset = dragBottomOffset = 0;
@@ -559,7 +577,7 @@ debug*/
 
 		@Override
 		public void mouseDragged( MouseEvent e ) {
-			if( !isWindowResizable() )
+			if( !SwingUtilities.isLeftMouseButton( e ) || !isWindowResizable() )
 				return;
 
 			int xOnScreen = e.getXOnScreen();
@@ -579,8 +597,8 @@ debug*/
 			// top
 			if( resizeDir == N_RESIZE_CURSOR || resizeDir == NW_RESIZE_CURSOR || resizeDir == NE_RESIZE_CURSOR ) {
 				newBounds.y = yOnScreen - dragTopOffset;
-				if( limitToParentBounds() && newBounds.y < 0 )
-					newBounds.y = 0;
+				if( limitToParentBounds() )
+					newBounds.y = Math.max( newBounds.y, getParentBounds().y );
 				newBounds.height += (oldBounds.y - newBounds.y);
 			}
 
@@ -597,8 +615,8 @@ debug*/
 			// left
 			if( resizeDir == W_RESIZE_CURSOR || resizeDir == NW_RESIZE_CURSOR || resizeDir == SW_RESIZE_CURSOR ) {
 				newBounds.x = xOnScreen - dragLeftOffset;
-				if( limitToParentBounds() && newBounds.x < 0 )
-					newBounds.x = 0;
+				if( limitToParentBounds() )
+					newBounds.x = Math.max( newBounds.x, getParentBounds().x );
 				newBounds.width += (oldBounds.x - newBounds.x);
 			}
 

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

@@ -38,7 +38,6 @@ import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
 import javax.swing.event.EventListenerList;
 import com.formdev.flatlaf.util.LoggingFacade;
-import com.formdev.flatlaf.util.NativeLibrary;
 import com.formdev.flatlaf.util.SystemInfo;
 
 //
@@ -82,7 +81,6 @@ class FlatWindowsNativeWindowBorder
 	private Color colorizationColor;
 	private int colorizationColorBalance;
 
-	private static NativeLibrary nativeLibrary;
 	private static FlatWindowsNativeWindowBorder instance;
 
 	static FlatNativeWindowBorder.Provider getInstance() {
@@ -94,35 +92,8 @@ class FlatWindowsNativeWindowBorder
 		if( !SystemInfo.isX86 && !SystemInfo.isX86_64 )
 			return null;
 
-		// load native library
-		if( nativeLibrary == null ) {
-			if( !SystemInfo.isJava_9_orLater ) {
-				// In Java 8, load jawt.dll (part of JRE) explicitly because it
-				// is not found when running application with <jdk>/bin/java.exe.
-				// When using <jdk>/jre/bin/java.exe, it is found.
-				// jawt.dll is located in <jdk>/jre/bin/.
-				// Java 9 and later does not have this problem.
-				try {
-					System.loadLibrary( "jawt" );
-				} catch( UnsatisfiedLinkError ex ) {
-					// log error only if native library jawt.dll not already loaded
-					String message = ex.getMessage();
-					if( message == null || !message.contains( "already loaded in another classloader" ) )
-						LoggingFacade.INSTANCE.logSevere( null, ex );
-				} catch( Exception ex ) {
-					LoggingFacade.INSTANCE.logSevere( null, ex );
-				}
-			}
-
-			String libraryName = "com/formdev/flatlaf/natives/flatlaf-windows-x86";
-			if( SystemInfo.isX86_64 )
-				libraryName += "_64";
-
-			nativeLibrary = new NativeLibrary( libraryName, null, true );
-		}
-
 		// check whether native library was successfully loaded
-		if( !nativeLibrary.isLoaded() )
+		if( !FlatNativeLibrary.isLoaded() )
 			return null;
 
 		// create new instance
@@ -140,7 +111,7 @@ class FlatWindowsNativeWindowBorder
 	}
 
 	/**
-	 * Tell the window whether the application wants use custom decorations.
+	 * Tell the window whether the application wants to use custom decorations.
 	 * If {@code true}, the Windows 10 title bar is hidden (including minimize,
 	 * maximize and close buttons), but not the resize borders (including drop shadow).
 	 */