release 3.4

also added missing `Table.paintOutsideAlternateRows`

.github/workflows/ci.yml

@@ -9,6 +9,14 @@ on:
       - '*'
     tags:
       - '[0-9]*'
+    paths-ignore:
+      - '**.md'
+      - '.*'
+      - '**/.settings/**'
+      - 'flatlaf-core/svg/**'
+      - 'flatlaf-testing/dumps/**'
+      - 'flatlaf-testing/misc/**'
+      - 'images/**'
 
 jobs:
   build:
@@ -30,13 +38,13 @@ jobs:
             toolchain: 21  # latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
-      - uses: gradle/wrapper-validation-action@v1
+      - uses: gradle/wrapper-validation-action@v2
         if: matrix.java == '8'
 
       - name: Setup Java ${{ matrix.java }}
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: ${{ matrix.java }}
           distribution: temurin  # Java 8, 11 and 17 are pre-installed on ubuntu-latest
@@ -50,7 +58,7 @@ jobs:
         run: ./gradlew build -Dtoolchain=${{ matrix.toolchain }}
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: matrix.java == '11'
         with:
           name: FlatLaf-build-artifacts
@@ -70,10 +78,10 @@ jobs:
       github.repository == 'JFormDesigner/FlatLaf'
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Java 11
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 11
           distribution: temurin  # pre-installed on ubuntu-latest
@@ -106,10 +114,10 @@ jobs:
       github.repository == 'JFormDesigner/FlatLaf'
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Java 11
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 11
           distribution: temurin  # pre-installed on ubuntu-latest

.github/workflows/fonts.yml

@@ -13,6 +13,8 @@ on:
             - 'flatlaf-fonts/**'
             - '.github/workflows/fonts.yml'
             - 'gradle/wrapper/gradle-wrapper.properties'
+            - '!**.md'
+            - '!**/.settings/**'
 
 jobs:
     Fonts:
@@ -30,10 +32,10 @@ jobs:
             github.repository == 'JFormDesigner/FlatLaf'
 
         steps:
-            - uses: actions/checkout@v3
+            - uses: actions/checkout@v4
 
             - name: Setup Java 11
-              uses: actions/setup-java@v3
+              uses: actions/setup-java@v4
               with:
                   java-version: 11
                   distribution: temurin  # pre-installed on ubuntu-latest

.github/workflows/natives.yml

@@ -13,6 +13,8 @@ on:
             - 'flatlaf-natives/**'
             - '.github/workflows/natives.yml'
             - 'gradle/wrapper/gradle-wrapper.properties'
+            - '!**.md'
+            - '!**/.settings/**'
 
 jobs:
     Natives:
@@ -26,12 +28,12 @@ jobs:
         runs-on: ${{ matrix.os }}-latest
 
         steps:
-            - uses: actions/checkout@v3
+            - uses: actions/checkout@v4
 
-            - uses: gradle/wrapper-validation-action@v1
+            - uses: gradle/wrapper-validation-action@v2
 
             - name: Setup Java 11
-              uses: actions/setup-java@v3
+              uses: actions/setup-java@v4
               with:
                   java-version: 11
                   distribution: temurin
@@ -43,7 +45,7 @@ jobs:
               run: ./gradlew build-natives --no-daemon
 
             - name: Upload artifacts
-              uses: actions/upload-artifact@v3
+              uses: actions/upload-artifact@v4
               with:
                   name: FlatLaf-natives-build-artifacts-${{ matrix.os }}
                   path: |

.github/workflows/pr-snapshots.yml

@@ -0,0 +1,37 @@
+# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
+
+name: PR Snapshots
+
+on:
+  pull_request:
+    paths-ignore:
+      - '**.md'
+      - '.*'
+      - '**/.settings/**'
+      - 'flatlaf-core/svg/**'
+      - 'flatlaf-testing/dumps/**'
+      - 'flatlaf-testing/misc/**'
+      - 'images/**'
+
+jobs:
+  snapshot:
+    runs-on: ubuntu-latest
+    if: github.repository == 'JFormDesigner/FlatLaf'
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Java 11
+        uses: actions/setup-java@v4
+        with:
+          java-version: 11
+          distribution: temurin  # pre-installed on ubuntu-latest
+          cache: gradle
+
+      - name: Publish PR snapshot to oss.sonatype.org
+        run: >
+          ./gradlew publish -PskipFonts -Dorg.gradle.internal.publish.checksums.insecure=true -Dorg.gradle.parallel=false
+          -Pgithub.event.pull_request.number=${{ github.event.pull_request.number }}
+        env:
+          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+          OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}

CHANGELOG.md

@@ -1,6 +1,39 @@
 FlatLaf Change Log
 ==================
 
+## 3.4
+
+#### New features and improvements
+
+- FlatLaf window decorations (Windows 10/11 and Linux): Support "full window
+  content" mode, which allows you to extend the content into the window title
+  bar. (PR #801)
+- macOS: Support larger window title bar close/minimize/zoom buttons spacing in
+  [full window content](https://www.formdev.com/flatlaf/macos/#full_window_content)
+  mode and introduced "buttons placeholder". (PR #779)
+- Native libraries:
+  - System property `flatlaf.nativeLibraryPath` now supports loading native
+    libraries named the same as on Maven central.
+  - Published `flatlaf-<version>-no-natives.jar` to Maven Central. This JAR is
+    equal to `flatlaf-<version>.jar`, except that it does not contain the
+    FlatLaf native libraries. The Maven "classifier" to use this JAR is
+    `no-natives`. You need to distribute the FlatLaf native libraries with your
+    application.
+    See https://www.formdev.com/flatlaf/native-libraries/ for more details.
+  - Improved log messages for loading fails.
+- Fonts: Updated **Inter** to
+  [v4.0](https://github.com/rsms/inter/releases/tag/v4.0).
+- Table: Select all text in cell editor when starting editing using `F2` key.
+  (issue 652)
+
+#### Fixed bugs
+
+- macOS: Setting window background (of undecorated window) to translucent color
+  (alpha < 255) did not show the window translucent. (issue #705)
+- JIDE CommandMenuBar: Fixed `ClassCastException` when JIDE command bar displays
+  `JideMenu` in popup. (PR #794)
+
+
 ## 3.3
 
 #### New features and improvements

build.gradle.kts

@@ -18,6 +18,12 @@ import net.ltgt.gradle.errorprone.errorprone
 
 version = property( if( hasProperty( "release" ) ) "flatlaf.releaseVersion" else "flatlaf.developmentVersion" ) as String
 
+// for PR snapshots change version to 'PR-<pr_number>-SNAPSHOT'
+val pullRequestNumber = findProperty( "github.event.pull_request.number" )
+if( pullRequestNumber != null )
+	version = "PR-${pullRequestNumber}-SNAPSHOT"
+
+
 allprojects {
 	version = rootProject.version
 

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

@@ -124,7 +124,7 @@ tasks.withType<Sign>().configureEach {
 }
 
 // check whether parallel build is enabled
-tasks.withType<PublishToMavenRepository>().configureEach {
+tasks.withType<AbstractPublishToMaven>().configureEach {
 	doFirst {
 		if( System.getProperty( "org.gradle.parallel" ) == "true" )
 			throw RuntimeException( "Publishing does not work correctly with enabled parallel build. Disable parallel build with VM option '-Dorg.gradle.parallel=false'." )

flatlaf-core/build.gradle.kts

@@ -61,6 +61,27 @@ tasks {
 		archiveBaseName.set( "flatlaf" )
 	}
 
+	register<Zip>( "jarNoNatives" ) {
+		group = "build"
+		dependsOn( "jar" )
+
+		archiveBaseName.set( "flatlaf" )
+		archiveClassifier.set( "no-natives" )
+		archiveExtension.set( "jar" )
+		destinationDirectory = layout.buildDirectory.dir( "libs" )
+
+		from( zipTree( jar.get().archiveFile.get().asFile ) )
+		exclude( "com/formdev/flatlaf/natives/**" )
+	}
+
+	withType<AbstractPublishToMaven>().configureEach {
+		dependsOn( "jarNoNatives" )
+	}
+
+	withType<Sign>().configureEach {
+		dependsOn( "jarNoNatives" )
+	}
+
 	check {
 		dependsOn( "sigtestCheck" )
 	}
@@ -127,6 +148,8 @@ flatlafPublish {
 
 	val natives = "src/main/resources/com/formdev/flatlaf/natives"
 	nativeArtifacts = listOf(
+		NativeArtifact( tasks.getByName( "jarNoNatives" ).outputs.files.asPath, "no-natives", "jar" ),
+
 		NativeArtifact( "${natives}/flatlaf-windows-x86.dll",       "windows-x86",    "dll" ),
 		NativeArtifact( "${natives}/flatlaf-windows-x86_64.dll",    "windows-x86_64", "dll" ),
 		NativeArtifact( "${natives}/flatlaf-windows-arm64.dll",     "windows-arm64",  "dll" ),

flatlaf-core/flatlaf-core-sigtest.txt

@@ -1,5 +1,5 @@
 #Signature file v4.1
-#Version 3.3
+#Version 3.4
 
 CLSS public abstract interface com.formdev.flatlaf.FlatClientProperties
 fld public final static java.lang.String BUTTON_TYPE = "JButton.buttonType"
@@ -12,7 +12,13 @@ fld public final static java.lang.String BUTTON_TYPE_TOOLBAR_BUTTON = "toolBarBu
 fld public final static java.lang.String COMPONENT_FOCUS_OWNER = "JComponent.focusOwner"
 fld public final static java.lang.String COMPONENT_ROUND_RECT = "JComponent.roundRect"
 fld public final static java.lang.String COMPONENT_TITLE_BAR_CAPTION = "JComponent.titleBarCaption"
+fld public final static java.lang.String FULL_WINDOW_CONTENT = "FlatLaf.fullWindowContent"
+fld public final static java.lang.String FULL_WINDOW_CONTENT_BUTTONS_BOUNDS = "FlatLaf.fullWindowContent.buttonsBounds"
+fld public final static java.lang.String FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER = "FlatLaf.fullWindowContent.buttonsPlaceholder"
 fld public final static java.lang.String GLASS_PANE_FULL_HEIGHT = "JRootPane.glassPaneFullHeight"
+fld public final static java.lang.String MACOS_WINDOW_BUTTONS_SPACING = "FlatLaf.macOS.windowButtonsSpacing"
+fld public final static java.lang.String MACOS_WINDOW_BUTTONS_SPACING_LARGE = "large"
+fld public final static java.lang.String MACOS_WINDOW_BUTTONS_SPACING_MEDIUM = "medium"
 fld public final static java.lang.String MENU_BAR_EMBEDDED = "JRootPane.menuBarEmbedded"
 fld public final static java.lang.String MINIMUM_HEIGHT = "JComponent.minimumHeight"
 fld public final static java.lang.String MINIMUM_WIDTH = "JComponent.minimumWidth"

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

@@ -257,19 +257,116 @@ public interface FlatClientProperties
 	String COMPONENT_FOCUS_OWNER = "JComponent.focusOwner";
 
 	/**
-	 * Specifies whether a component in an embedded menu bar should behave as caption
+	 * Specifies whether a component shown in a window title bar area 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,
+	 * The caption component does not receive mouse pressed/released/clicked/dragged events,
 	 * but it gets mouse entered/exited/moved events.
 	 * <p>
+	 * Since 3.4, this client property also supports using a function that can check
+	 * whether a given location in the component should behave as caption.
+	 * Useful for components that do not use mouse input on whole component bounds.
+	 *
+	 * <pre>{@code
+	 * myComponent.putClientProperty( "JComponent.titleBarCaption",
+	 *     (Function<Point, Boolean>) pt -> {
+	 *         // parameter pt contains mouse location (in myComponent coordinates)
+	 *         // return true if the component is not interested in mouse input at the given location
+	 *         // return false if the component wants process mouse input at the given location
+	 *         // return null if the component children should be checked
+	 *         return ...; // check here
+	 *     } );
+	 * }</pre>
+	 * <b>Warning</b>:
+	 * <ul>
+	 *   <li>This function is invoked often when mouse is moved over window title bar area
+	 *       and should therefore return quickly.
+	 *   <li>This function is invoked on 'AWT-Windows' thread (not 'AWT-EventQueue' thread)
+	 *       while processing Windows messages.
+	 *       It <b>must not</b> change any component property or layout because this could cause a dead lock.
+	 * </ul>
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JComponent}<br>
-	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 * <strong>Value type</strong> {@link java.lang.Boolean} or {@link java.util.function.Function}&lt;Point, Boolean&gt;
 	 *
 	 * @since 2.5
 	 */
 	String COMPONENT_TITLE_BAR_CAPTION = "JComponent.titleBarCaption";
 
 
+	//---- Panel --------------------------------------------------------------
+
+	/**
+	 * Marks the panel as placeholder for the iconfify/maximize/close buttons
+	 * in fullWindowContent mode. See {@link #FULL_WINDOW_CONTENT}.
+	 * <p>
+	 * If fullWindowContent mode is enabled, the preferred size of the panel is equal
+	 * to the size of the iconfify/maximize/close buttons. Otherwise is is {@code 0,0}.
+	 * <p>
+	 * You're responsible to layout that panel at the top-left or top-right corner,
+	 * depending on platform, where the iconfify/maximize/close buttons are located.
+	 * <p>
+	 * Syntax of the value string is: {@code "win|mac [horizontal|vertical] [zeroInFullScreen] [leftToRight|rightToLeft]"}.
+	 * <p>
+	 * The string must start with {@code "win"} (for Windows or Linux) or
+	 * with {@code "mac"} (for macOS) and specifies the platform where the placeholder
+	 * should be used. On macOS, you need the placeholder in the top-left corner,
+	 * but on Windows/Linux you need it in the top-right corner. So if your application supports
+	 * fullWindowContent mode on both platforms, you can add two placeholders to your layout
+	 * and FlatLaf automatically uses only one of them. The other gets size {@code 0,0}.
+	 * <p>
+	 * Optionally, you can append following options to the value string (separated by space characters):
+	 * <ul>
+	 *   <li>{@code "horizontal"} - preferred height is zero
+	 *   <li>{@code "vertical"} - preferred width is zero
+	 *   <li>{@code "zeroInFullScreen"} - in full-screen mode on macOS, preferred size is {@code 0,0}
+	 *   <li>{@code "leftToRight"} - in right-to-left component orientation, preferred size is {@code 0,0}
+	 *   <li>{@code "rightToLeft"} - in left-to-right component orientation, preferred size is {@code 0,0}
+	 * </ul>
+	 *
+	 * Example for adding placeholder to top-left corner on macOS:
+	 * <pre>{@code
+	 * JPanel placeholder = new JPanel();
+	 * placeholder.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER, "mac" );
+     *
+     * JToolBar toolBar = new JToolBar();
+     * // add tool bar items
+     *
+	 * JPanel toolBarPanel = new JPanel( new BorderLayout() );
+	 * toolBarPanel.add( placeholder, BorderLayout.WEST );
+	 * toolBarPanel.add( toolBar, BorderLayout.CENTER );
+	 *
+	 * frame.getContentPane().add( toolBarPanel, BorderLayout.NORTH );
+	 * }</pre>
+	 *
+	 * Or add placeholder as first item to the tool bar:
+	 * <pre>{@code
+	 * JPanel placeholder = new JPanel();
+	 * placeholder.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER, "mac" );
+	 *
+	 * JToolBar toolBar = new JToolBar();
+	 * toolBar.add( placeholder );
+	 * // add tool bar items
+	 *
+	 * frame.getContentPane().add( toolBar, BorderLayout.NORTH );
+	 * }</pre>
+	 *
+	 * If a tabbed pane is located at the top, you can add the placeholder
+	 * as leading component to that tabbed pane:
+	 * <pre>{@code
+	 * JPanel placeholder = new JPanel();
+	 * placeholder.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER, "mac" );
+	 *
+	 * tabbedPane.putClientProperty( FlatClientProperties.TABBED_PANE_LEADING_COMPONENT, placeholder );
+	 * }</pre>
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JPanel}<br>
+	 * <strong>Value type</strong> {@link java.lang.String}
+	 *
+	 * @since 3.4
+	 */
+	String FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER = "FlatLaf.fullWindowContent.buttonsPlaceholder";
+
+
 	//---- Popup --------------------------------------------------------------
 
 	/**
@@ -388,6 +485,46 @@ public interface FlatClientProperties
 	 */
 	String MENU_BAR_EMBEDDED = "JRootPane.menuBarEmbedded";
 
+	/**
+	 * Specifies whether the content pane (and the glass pane) should be extended
+	 * into the window title bar area
+	 * (requires enabled window decorations). Default is {@code false}.
+	 * <p>
+	 * On macOS, use client property {@code apple.awt.fullWindowContent}
+	 * (see <a href="https://www.formdev.com/flatlaf/macos/#full_window_content">macOS Full window content</a>).
+	 * <p>
+	 * Setting this enables/disables full window content
+	 * for the {@code JFrame} or {@code JDialog} that contains the root pane.
+	 * <p>
+	 * If {@code true}, the content pane (and the glass pane) is extended into
+	 * the title bar area. The window icon and title are hidden.
+	 * Only the iconfify/maximize/close buttons stay visible in the upper right corner
+	 * (and overlap the content pane).
+	 * <p>
+	 * The user can left-click-and-drag on the title bar area to move the window,
+	 * except when clicking on a component that processes mouse events (e.g. buttons or menus).
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Boolean}
+	 *
+	 * @since 3.4
+	 */
+	String FULL_WINDOW_CONTENT = "FlatLaf.fullWindowContent";
+
+	/**
+	 * Contains the current bounds of the iconfify/maximize/close buttons
+	 * (in root pane coordinates) if fullWindowContent mode is enabled.
+	 * Otherwise its value is {@code null}.
+	 * <p>
+	 * <b>Note</b>: Do not set this client property. It is set by FlatLaf.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.awt.Rectangle}
+	 *
+	 * @since 3.4
+	 */
+	String FULL_WINDOW_CONTENT_BUTTONS_BOUNDS = "FlatLaf.fullWindowContent.buttonsBounds";
+
 	/**
 	 * Specifies whether the window icon should be shown in the window title bar
 	 * (requires enabled window decorations). Default is UI property {@code TitlePane.showIcon}.
@@ -1263,6 +1400,44 @@ public interface FlatClientProperties
 	String TREE_PAINT_SELECTION = "JTree.paintSelection";
 
 
+	//---- macOS --------------------------------------------------------------
+
+	/**
+	 * Specifies the spacing around the macOS window close/minimize/zoom buttons.
+	 * Useful if <a href="https://www.formdev.com/flatlaf/macos/#full_window_content">full window content</a>
+	 * is enabled.
+	 * <p>
+	 * (requires macOS 10.14+ for "medium" spacing and macOS 11+ for "large" spacing, requires Java 17+)
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.String}<br>
+	 * <strong>Allowed Values</strong>
+	 *     {@link #MACOS_WINDOW_BUTTONS_SPACING_MEDIUM} or
+	 *     {@link #MACOS_WINDOW_BUTTONS_SPACING_LARGE} (requires macOS 11+)
+	 *
+	 * @since 3.4
+	 */
+	String MACOS_WINDOW_BUTTONS_SPACING = "FlatLaf.macOS.windowButtonsSpacing";
+
+	/**
+	 * Add medium spacing around the macOS window close/minimize/zoom buttons.
+	 *
+	 * @see #MACOS_WINDOW_BUTTONS_SPACING
+	 * @since 3.4
+	 */
+	String MACOS_WINDOW_BUTTONS_SPACING_MEDIUM = "medium";
+
+	/**
+	 * Add large spacing around the macOS window close/minimize/zoom buttons.
+	 * <p>
+	 * (requires macOS 11+; "medium" is used on older systems)
+	 *
+	 * @see #MACOS_WINDOW_BUTTONS_SPACING
+	 * @since 3.4
+	 */
+	String MACOS_WINDOW_BUTTONS_SPACING_LARGE = "large";
+
+
 	//---- helper methods -----------------------------------------------------
 
 	/**

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

@@ -172,19 +172,33 @@ public interface FlatSystemProperties
 	String USE_NATIVE_LIBRARY = "flatlaf.useNativeLibrary";
 
 	/**
-	 * Specifies a directory in which the native FlatLaf libraries have been extracted.
+	 * Specifies a directory in which the FlatLaf native libraries are searched for.
 	 * 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.
 	 * <p>
-	 * If the value is {@code "system"}, then {@link System#loadLibrary(String)} is
+	 * If the value is {@code "system"} (supported since FlatLaf 2.6),
-	 * used to load the native library.
+	 * then {@link System#loadLibrary(String)} is used to load the native library.
-	 * Searches for the native library in classloader of caller
+	 * This searches for the native library in classloader of caller
 	 * (using {@link ClassLoader#findLibrary(String)}) and in paths specified
 	 * in system properties {@code sun.boot.library.path} and {@code java.library.path}.
-	 * (supported since FlatLaf 2.6)
 	 * <p>
 	 * If the native library can not be loaded from the given path (or via {@link System#loadLibrary(String)}),
 	 * then the embedded native library is extracted to the temporary directory and loaded from there.
+	 * <p>
+	 * The file names of the native libraries must be either:
+	 * <ul>
+	 *   <li>the same as in flatlaf.jar in package 'com/formdev/flatlaf/natives' (required for "system") or
+	 *   <li>when downloaded from Maven central then as described here:
+	 *     <a href="https://www.formdev.com/flatlaf/native-libraries/">https://www.formdev.com/flatlaf/native-libraries/</a>
+	 *     (requires FlatLaf 3.4)
+	 * </ul>
+	 * <p>
+	 * <strong>Note</strong>: Since FlatLaf 3.1 it is recommended to download the
+	 * FlatLaf native libraries from Maven central and distribute them with your
+	 * application in the same directory as flatlaf.jar.
+	 * Then it is <strong>not necessary</strong> to set this system property.
+	 * See <a href="https://www.formdev.com/flatlaf/native-libraries/">https://www.formdev.com/flatlaf/native-libraries/</a>
+	 * for details.
 	 *
 	 * @since 2
 	 */

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

@@ -429,7 +429,7 @@ public class FlatFileChooserUI
 			iconFunction = (Function<File, Icon>) UIManager.get( "FileChooser.shortcuts.iconFunction" );
 
 			FileSystemView fsv = fc.getFileSystemView();
-			File[] files = getChooserShortcutPanelFiles( fsv );
+			File[] files = JavaCompatibility2.getChooserShortcutPanelFiles( fsv );
 			if( filesFunction != null )
 				files = filesFunction.apply( files );
 
@@ -498,32 +498,6 @@ public class FlatFileChooserUI
 			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 );

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

@@ -27,7 +27,6 @@ import java.awt.event.ActionEvent;
 import java.beans.PropertyChangeListener;
 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;
@@ -39,7 +38,6 @@ import javax.swing.MenuElement;
 import javax.swing.MenuSelectionManager;
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
-import javax.swing.plaf.ActionMapUIResource;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicMenuBarUI;
@@ -144,12 +142,10 @@ public class FlatMenuBarUI
 	protected void installKeyboardActions() {
 		super.installKeyboardActions();
 
+		// get shared action map, used for all menu bars
 		ActionMap map = SwingUtilities.getUIActionMap( menuBar );
-		if( map == null ) {
+		if( map != null && !(map.get( "takeFocus" ) instanceof TakeFocusAction) )
-			map = new ActionMapUIResource();
+			map.put( "takeFocus", new TakeFocusAction( "takeFocus" ) );
-			SwingUtilities.replaceUIActionMap( menuBar, map );
-		}
-		map.put( "takeFocus", new TakeFocus() );
 	}
 
 	/** @since 2 */
@@ -365,16 +361,20 @@ public class FlatMenuBarUI
 		}
 	}
 
-	//---- class TakeFocus ----------------------------------------------------
+	//---- class TakeFocusAction ----------------------------------------------
 
 	/**
 	 * Activates the menu bar and shows mnemonics.
 	 * On Windows, the popup of the first menu is not shown.
 	 * On other platforms, the popup of the first menu is shown.
 	 */
-	private static class TakeFocus
+	private static class TakeFocusAction
-		extends AbstractAction
+		extends FlatUIAction
 	{
+		TakeFocusAction( String name ) {
+			super( name );
+		}
+
 		@Override
 		public void actionPerformed( ActionEvent e ) {
 			JMenuBar menuBar = (JMenuBar) e.getSource();

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatMenuUI.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.Font;
 import java.awt.Graphics;
@@ -271,7 +272,7 @@ public class FlatMenuUI
 				if( !isHover() )
 					selectionBackground = getStyleFromMenuBarUI( ui -> ui.selectionBackground, menuBarSelectionBackground, selectionBackground );
 
-				JMenuBar menuBar = (JMenuBar) menuItem.getParent();
+				Container menuBar = menuItem.getParent();
 				JRootPane rootPane = SwingUtilities.getRootPane( menuBar );
 				if( rootPane != null && rootPane.getParent() instanceof Window &&
 					rootPane.getJMenuBar() == menuBar &&
@@ -321,12 +322,17 @@ public class FlatMenuUI
 		}
 
 		private <T> T getStyleFromMenuBarUI( Function<FlatMenuBarUI, T> f, T defaultValue ) {
-			MenuBarUI ui = ((JMenuBar)menuItem.getParent()).getUI();
+			Container menuItemParent = menuItem.getParent();
-			if( !(ui instanceof FlatMenuBarUI) )
+			if( menuItemParent instanceof JMenuBar ) {
-				return defaultValue;
+				MenuBarUI ui = ((JMenuBar) menuItemParent).getUI();
-
+				if( ui instanceof FlatMenuBarUI ) {
-			T value = f.apply( (FlatMenuBarUI) ui );
+					T value = f.apply( (FlatMenuBarUI) ui );
-			return (value != null) ? value : defaultValue;
+					if( value != null ) {
+						return value;
+					}
+				}
+			}
+			return defaultValue;
 		}
 	}
 }

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

@@ -22,6 +22,7 @@ import java.security.CodeSource;
 import com.formdev.flatlaf.FlatSystemProperties;
 import com.formdev.flatlaf.util.LoggingFacade;
 import com.formdev.flatlaf.util.NativeLibrary;
+import com.formdev.flatlaf.util.StringUtils;
 import com.formdev.flatlaf.util.SystemInfo;
 
 /**
@@ -117,13 +118,32 @@ class FlatNativeLibrary
 				if( library.isLoaded() )
 					return library;
 
-				LoggingFacade.INSTANCE.logSevere( "Did not find library " + libraryName + " in java.library.path, using extracted library instead", null );
+				LoggingFacade.INSTANCE.logSevere( "Did not find library '" + System.mapLibraryName( libraryName )
+					+ "' in java.library.path '" + System.getProperty( "java.library.path" )
+					+ "', using extracted library instead", null );
 			} else {
+				// try standard library naming scheme
+				// (same as in flatlaf.jar in package 'com/formdev/flatlaf/natives')
 				File libraryFile = new File( libraryPath, System.mapLibraryName( libraryName ) );
 				if( libraryFile.exists() )
 					return new NativeLibrary( libraryFile, true );
 
-				LoggingFacade.INSTANCE.logSevere( "Did not find external library " + libraryFile + ", using extracted library instead", null );
+				// try Maven naming scheme
+				// (see https://www.formdev.com/flatlaf/native-libraries/)
+				String libraryName2 = null;
+				File jarFile = getJarFile();
+				if( jarFile != null ) {
+					libraryName2 = buildLibraryName( jarFile, classifier, ext );
+					File libraryFile2 = new File( libraryPath, libraryName2 );
+					if( libraryFile2.exists() )
+						return new NativeLibrary( libraryFile2, true );
+				}
+
+				LoggingFacade.INSTANCE.logSevere( "Did not find library '"
+					+ libraryFile.getName()
+					+ (libraryName2 != null ? ("' or '" + libraryName2) : "")
+					+ "' in '" + libraryFile.getParentFile().getAbsolutePath()
+					+ "', using extracted library instead", null );
 			}
 		}
 
@@ -151,6 +171,51 @@ class FlatNativeLibrary
 	 *     flatlaf-3.1-linux-x86_64.so
 	 */
 	private static File findLibraryBesideJar( String classifier, String ext ) {
+		// get location of FlatLaf jar (or fat/uber application jar)
+		File jarFile = getJarFile();
+		if( jarFile == null )
+			return null;
+
+		// build library file
+		String libraryName = buildLibraryName( jarFile, classifier, ext );
+		File jarDir = jarFile.getParentFile();
+
+		// check whether native library exists in same directory as jar
+		File libraryFile = new File( jarDir, libraryName );
+		if( libraryFile.isFile() )
+			return libraryFile;
+
+		// if jar is in "lib" directory, then also check whether native library exists
+		// in "../bin" directory
+		if( jarDir.getName().equalsIgnoreCase( "lib" ) ) {
+			libraryFile = new File( jarDir.getParentFile(), "bin/" + libraryName );
+			if( libraryFile.isFile() )
+				return libraryFile;
+		}
+
+		// special case: support Gradle cache when running in development environment
+		//   <user-home>/.gradle/caches/modules-2/files-2.1/com.formdev/flatlaf/<version>/<hash-1>/flatlaf-<version>.jar
+		//   <user-home>/.gradle/caches/modules-2/files-2.1/com.formdev/flatlaf/<version>/<hash-2>/flatlaf-<version>-windows-x86_64.dll
+		String path = jarDir.getAbsolutePath().replace( '\\', '/' );
+		if( path.contains( "/.gradle/caches/" ) ) {
+			File versionDir = jarDir.getParentFile();
+			if( libraryName.contains( versionDir.getName() ) ) {
+				File[] dirs = versionDir.listFiles();
+				if( dirs != null ) {
+					for( File dir : dirs ) {
+						libraryFile = new File( dir, libraryName );
+						if( libraryFile.isFile() )
+							return libraryFile;
+					}
+				}
+			}
+		}
+
+		// native library not found
+		return null;
+	}
+
+	private static File getJarFile() {
 		try {
 			// get location of FlatLaf jar
 			CodeSource codeSource = FlatNativeLibrary.class.getProtectionDomain().getCodeSource();
@@ -168,31 +233,23 @@ class FlatNativeLibrary
 			if( !jarFile.isFile() )
 				return null;
 
-			// build library file
+			return jarFile;
-			String jarName = jarFile.getName();
-			String jarBasename = jarName.substring( 0, jarName.lastIndexOf( '.' ) );
-			File parent = jarFile.getParentFile();
-			String libraryName = jarBasename
-				+ (jarBasename.contains( "flatlaf" ) ? "" : "-flatlaf")
-				+ '-' + classifier + '.' + ext;
-
-			// check whether native library exists in same directory as jar
-			File libraryFile = new File( parent, libraryName );
-			if( libraryFile.isFile() )
-				return libraryFile;
-
-			// if jar is in "lib" directory, then also check whether library exists
-			// in "../bin" directory
-			if( parent.getName().equalsIgnoreCase( "lib" ) ) {
-				libraryFile = new File( parent.getParentFile(), "bin/" + libraryName );
-				if( libraryFile.isFile() )
-					return libraryFile;
-			}
 		} catch( Exception ex ) {
 			LoggingFacade.INSTANCE.logSevere( ex.getMessage(), ex );
+			return null;
 		}
+	}
 
-		return null;
+	private static String buildLibraryName( File jarFile, String classifier, String ext ) {
+		String jarName = jarFile.getName();
+		String jarBasename = jarName.substring( 0, jarName.lastIndexOf( '.' ) );
+
+		// remove classifier "no-natives" (if used)
+		jarBasename = StringUtils.removeTrailing( jarBasename, "-no-natives" );
+
+		return jarBasename
+			+ (jarBasename.contains( "flatlaf" ) ? "" : "-flatlaf")
+			+ '-' + classifier + '.' + ext;
 	}
 
 	private static void loadJAWT() {

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

@@ -16,7 +16,9 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.Rectangle;
 import java.awt.Window;
+import com.formdev.flatlaf.util.SystemInfo;
 
 /**
  * Native methods for macOS.
@@ -49,8 +51,19 @@ public class FlatNativeMacLibrary
 	 *              method of this class. Otherwise, the native library may not be loaded.
 	 */
 	public static boolean isLoaded() {
-		return FlatNativeLibrary.isLoaded();
+		return SystemInfo.isMacOS && FlatNativeLibrary.isLoaded();
 	}
 
 	public native static boolean setWindowRoundedBorder( Window window, float radius, float borderWidth, int borderColor );
+
+	/** @since 3.4 */
+	public static final int
+		BUTTONS_SPACING_DEFAULT = 0,
+		BUTTONS_SPACING_MEDIUM = 1,
+		BUTTONS_SPACING_LARGE = 2;
+
+	/** @since 3.4 */ public native static boolean setWindowButtonsSpacing( Window window, int buttonsSpacing );
+	/** @since 3.4 */ public native static Rectangle getWindowButtonsBounds( Window window );
+	/** @since 3.4 */ public native static boolean isWindowFullScreen( Window window );
+	/** @since 3.4 */ public native static boolean toggleWindowFullScreen( Window window );
 }

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

@@ -21,11 +21,12 @@ import java.awt.Component;
 import java.awt.Container;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
+import java.awt.Point;
 import java.awt.Rectangle;
 import java.awt.Toolkit;
 import java.awt.Window;
 import java.beans.PropertyChangeListener;
-import java.util.List;
+import java.util.function.Predicate;
 import javax.swing.JDialog;
 import javax.swing.JFrame;
 import javax.swing.JRootPane;
@@ -218,13 +219,13 @@ public class FlatNativeWindowBorder
 	}
 
 	static void setTitleBarHeightAndHitTestSpots( Window window, int titleBarHeight,
-		List<Rectangle> hitTestSpots, Rectangle appIconBounds, Rectangle minimizeButtonBounds,
+		Predicate<Point> captionHitTestCallback, Rectangle appIconBounds, Rectangle minimizeButtonBounds,
 		Rectangle maximizeButtonBounds, Rectangle closeButtonBounds )
 	{
 		if( !isSupported() )
 			return;
 
-		nativeProvider.updateTitleBarInfo( window, titleBarHeight, hitTestSpots,
+		nativeProvider.updateTitleBarInfo( window, titleBarHeight, captionHitTestCallback,
 			appIconBounds, minimizeButtonBounds, maximizeButtonBounds, closeButtonBounds );
 	}
 
@@ -270,7 +271,7 @@ public class FlatNativeWindowBorder
 	{
 		boolean hasCustomDecoration( Window window );
 		void setHasCustomDecoration( Window window, boolean hasCustomDecoration );
-		void updateTitleBarInfo( Window window, int titleBarHeight, List<Rectangle> hitTestSpots,
+		void updateTitleBarInfo( Window window, int titleBarHeight, Predicate<Point> captionHitTestCallback,
 			Rectangle appIconBounds, Rectangle minimizeButtonBounds, Rectangle maximizeButtonBounds,
 			Rectangle closeButtonBounds );
 

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

@@ -16,6 +16,7 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.awt.Dimension;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.beans.PropertyChangeEvent;
@@ -23,6 +24,7 @@ import java.beans.PropertyChangeListener;
 import java.util.Map;
 import javax.swing.JComponent;
 import javax.swing.JPanel;
+import javax.swing.LookAndFeel;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicPanelUI;
 import com.formdev.flatlaf.FlatClientProperties;
@@ -69,6 +71,8 @@ public class FlatPanelUI
 		super.installUI( c );
 
 		c.addPropertyChangeListener( this );
+		if( c.getClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER ) != null )
+			FullWindowContentSupport.registerPlaceholder( c );
 
 		installStyle( (JPanel) c );
 	}
@@ -78,10 +82,20 @@ public class FlatPanelUI
 		super.uninstallUI( c );
 
 		c.removePropertyChangeListener( this );
+		if( c.getClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER ) != null )
+			FullWindowContentSupport.unregisterPlaceholder( c );
 
 		oldStyleValues = null;
 	}
 
+	@Override
+	protected void installDefaults( JPanel p ) {
+		super.installDefaults( p );
+
+		if( p.getClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER ) != null )
+			LookAndFeel.installProperty( p, "opaque", false );
+	}
+
 	/** @since 2.0.1 */
 	@Override
 	public void propertyChange( PropertyChangeEvent e ) {
@@ -98,6 +112,17 @@ public class FlatPanelUI
 				c.revalidate();
 				c.repaint();
 				break;
+
+			case FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER:
+				JPanel p = (JPanel) e.getSource();
+				if( e.getOldValue() != null )
+					FullWindowContentSupport.unregisterPlaceholder( p );
+				if( e.getNewValue() != null )
+					FullWindowContentSupport.registerPlaceholder( p );
+
+				// make panel non-opaque for placeholders
+				LookAndFeel.installProperty( p, "opaque", e.getNewValue() == null );
+				break;
 		}
 	}
 
@@ -162,4 +187,19 @@ public class FlatPanelUI
 
 		paint( g, c );
 	}
+
+	@Override
+	public Dimension getPreferredSize( JComponent c ) {
+		Object value = c.getClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER );
+		if( value != null )
+			return FullWindowContentSupport.getPlaceholderPreferredSize( c, (String) value );
+
+		return super.getPreferredSize( c );
+	}
+
+	@Override
+	public void paint( Graphics g, JComponent c ) {
+		if( c.getClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER ) != null )
+			FullWindowContentSupport.debugPaint( g, c );
+	}
 }

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

@@ -28,8 +28,6 @@ import java.awt.Insets;
 import java.awt.LayoutManager;
 import java.awt.LayoutManager2;
 import java.awt.Window;
-import java.awt.event.ComponentAdapter;
-import java.awt.event.ComponentEvent;
 import java.awt.event.ComponentListener;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
@@ -41,7 +39,6 @@ import javax.swing.JLayeredPane;
 import javax.swing.JMenuBar;
 import javax.swing.JRootPane;
 import javax.swing.LookAndFeel;
-import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.border.Border;
 import javax.swing.plaf.BorderUIResource;
@@ -50,6 +47,7 @@ import javax.swing.plaf.RootPaneUI;
 import javax.swing.plaf.UIResource;
 import javax.swing.plaf.basic.BasicRootPaneUI;
 import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.FlatLaf;
 import com.formdev.flatlaf.util.HiDPIUtils;
 import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
@@ -87,8 +85,8 @@ public class FlatRootPaneUI
 
 	private Object nativeWindowBorderData;
 	private LayoutManager oldLayout;
-	private PropertyChangeListener ancestorListener;
+	private ComponentListener macFullWindowContentListener;
-	private ComponentListener componentListener;
+	private PropertyChangeListener macWindowBackgroundListener;
 
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatRootPaneUI();
@@ -106,6 +104,7 @@ public class FlatRootPaneUI
 			installBorder();
 
 		installNativeWindowBorder();
+		macInstallFullWindowContentSupport();
 	}
 
 	protected void installBorder() {
@@ -122,6 +121,7 @@ public class FlatRootPaneUI
 
 		uninstallNativeWindowBorder();
 		uninstallClientDecorations();
+		macUninstallFullWindowContentSupport();
 		rootPane = null;
 	}
 
@@ -155,6 +155,8 @@ public class FlatRootPaneUI
 			if( background == null || background instanceof UIResource )
 				parent.setBackground( UIManager.getColor( "control" ) );
 		}
+
+		macClearBackgroundForTranslucentWindow( c );
 	}
 
 	@Override
@@ -174,55 +176,20 @@ public class FlatRootPaneUI
 	protected void installListeners( JRootPane root ) {
 		super.installListeners( root );
 
-		if( SystemInfo.isJava_9_orLater ) {
+		if( SystemInfo.isMacFullWindowContentSupported )
-			// On HiDPI screens, where scaling is used, there may be white lines on the
+			macFullWindowContentListener = FullWindowContentSupport.macInstallListeners( root );
-			// bottom and on the right side of the window when it is initially shown.
+		macInstallWindowBackgroundListener( root );
-			// 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().
-			//
-			// Note: Not using a HierarchyListener here, which would be much easier,
-			// because this causes problems with mouse clicks in heavy-weight popups.
-			// Instead, add a listener to the root pane that waits until it is added
-			// to a window, then add a component listener to the window.
-			// See: https://github.com/JFormDesigner/FlatLaf/issues/371
-			ancestorListener = e -> {
-				Object oldValue = e.getOldValue();
-				Object newValue = e.getNewValue();
-				if( newValue instanceof Window ) {
-					if( componentListener == null ) {
-						componentListener = new ComponentAdapter() {
-							@Override
-							public void componentShown( ComponentEvent e ) {
-								// add whole root pane to dirty regions when window is initially shown
-								root.getParent().repaint( root.getX(), root.getY(), root.getWidth(), root.getHeight() );
-							}
-						};
-					}
-					((Window)newValue).addComponentListener( componentListener );
-				} else if( newValue == null && oldValue instanceof Window ) {
-					if( componentListener != null )
-						((Window)oldValue).removeComponentListener( componentListener );
-				}
-			};
-			root.addPropertyChangeListener( "ancestor", ancestorListener );
-		}
 	}
 
 	@Override
 	protected void uninstallListeners( JRootPane root ) {
 		super.uninstallListeners( root );
 
-		if( SystemInfo.isJava_9_orLater ) {
+		if( SystemInfo.isMacFullWindowContentSupported ) {
-			if( componentListener != null ) {
+			FullWindowContentSupport.macUninstallListeners( root, macFullWindowContentListener );
-				Window window = SwingUtilities.windowForComponent( root );
+			macFullWindowContentListener = null;
-				if( window != null )
-					window.removeComponentListener( componentListener );
-				componentListener = null;
-			}
-			root.removePropertyChangeListener( "ancestor", ancestorListener );
-			ancestorListener = null;
 		}
+		macUninstallWindowBackgroundListener( root );
 	}
 
 	/** @since 1.1.2 */
@@ -302,19 +269,136 @@ public class FlatRootPaneUI
 
 	// layer title pane under frame content layer to allow placing menu bar over title pane
 	protected final static Integer TITLE_PANE_LAYER = JLayeredPane.FRAME_CONTENT_LAYER - 1;
+	private final static Integer TITLE_PANE_MOUSE_LAYER = JLayeredPane.FRAME_CONTENT_LAYER - 2;
+
+	// for fullWindowContent mode, layer title pane over frame content layer to allow placing title bar buttons over content
+	/** @since 3.4 */
+	protected final static Integer TITLE_PANE_FULL_WINDOW_CONTENT_LAYER = JLayeredPane.FRAME_CONTENT_LAYER + 1;
+
+	private Integer getLayerForTitlePane() {
+		return isFullWindowContent( rootPane ) ? TITLE_PANE_FULL_WINDOW_CONTENT_LAYER : TITLE_PANE_LAYER;
+	}
 
 	protected void setTitlePane( FlatTitlePane newTitlePane ) {
 		JLayeredPane layeredPane = rootPane.getLayeredPane();
 
-		if( titlePane != null )
+		if( titlePane != null ) {
 			layeredPane.remove( titlePane );
+			layeredPane.remove( titlePane.mouseLayer );
+		}
 
-		if( newTitlePane != null )
+		if( newTitlePane != null ) {
-			layeredPane.add( newTitlePane, TITLE_PANE_LAYER );
+			layeredPane.add( newTitlePane, getLayerForTitlePane() );
+			layeredPane.add( newTitlePane.mouseLayer, TITLE_PANE_MOUSE_LAYER );
+		}
 
 		titlePane = newTitlePane;
 	}
 
+	private void macInstallFullWindowContentSupport() {
+		if( !SystemInfo.isMacOS )
+			return;
+
+		// set window buttons spacing
+		if( isMacButtonsSpacingSupported() && rootPane.isDisplayable() ) {
+			int buttonsSpacing = FlatNativeMacLibrary.BUTTONS_SPACING_DEFAULT;
+			String value = (String) rootPane.getClientProperty( FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING );
+			if( value != null ) {
+				switch( value ) {
+					case FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING_MEDIUM:
+						buttonsSpacing = FlatNativeMacLibrary.BUTTONS_SPACING_MEDIUM;
+						break;
+
+					case FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING_LARGE:
+						buttonsSpacing = FlatNativeMacLibrary.BUTTONS_SPACING_LARGE;
+						break;
+				}
+			}
+
+			FlatNativeMacLibrary.setWindowButtonsSpacing( getParentWindow( rootPane ), buttonsSpacing );
+		}
+
+		// update buttons bounds client property
+		FullWindowContentSupport.macUpdateFullWindowContentButtonsBoundsProperty( rootPane );
+	}
+
+	private void macUninstallFullWindowContentSupport() {
+		if( !SystemInfo.isMacOS )
+			return;
+
+		// do not uninstall when switching to another FlatLaf theme
+		if( UIManager.getLookAndFeel() instanceof FlatLaf )
+			return;
+
+		// reset window buttons spacing
+		if( isMacButtonsSpacingSupported() )
+			FlatNativeMacLibrary.setWindowButtonsSpacing( getParentWindow( rootPane ), FlatNativeMacLibrary.BUTTONS_SPACING_DEFAULT );
+
+		// remove buttons bounds client property
+		FullWindowContentSupport.macUninstallFullWindowContentButtonsBoundsProperty( rootPane );
+	}
+
+	private boolean isMacButtonsSpacingSupported() {
+		return SystemInfo.isMacOS && SystemInfo.isJava_17_orLater && FlatNativeMacLibrary.isLoaded();
+	}
+
+	private void macInstallWindowBackgroundListener( JRootPane c ) {
+		if( !SystemInfo.isMacOS )
+			return;
+
+		Window window = getParentWindow( c );
+		if( window != null && macWindowBackgroundListener == null ) {
+			macWindowBackgroundListener = e -> macClearBackgroundForTranslucentWindow( c );
+			window.addPropertyChangeListener( "background", macWindowBackgroundListener );
+		}
+	}
+
+	private void macUninstallWindowBackgroundListener( JRootPane c ) {
+		if( !SystemInfo.isMacOS )
+			return;
+
+		Window window = getParentWindow( c );
+		if( window != null && macWindowBackgroundListener != null ) {
+			window.removePropertyChangeListener( "background", macWindowBackgroundListener );
+			macWindowBackgroundListener = null;
+		}
+	}
+
+	/**
+	 * When setting window background to translucent color (alpha < 255),
+	 * Swing paints that window translucent on Windows and Linux, but not on macOS.
+	 * The reason for this is that FlatLaf sets the background color of the root pane,
+	 * and Swing behaves a bit differently on macOS than on other platforms in that case.
+	 * Other L&Fs do not set root pane background, which is {@code null} by default.
+	 * <p>
+	 * To fix this problem, set the root pane background to {@code null}
+	 * if windows uses a translucent background.
+	 */
+	private void macClearBackgroundForTranslucentWindow( JRootPane c ) {
+		if( !SystemInfo.isMacOS )
+			return;
+
+		Window window = getParentWindow( c );
+		if( window != null ) {
+			Color windowBackground = window.getBackground();
+			if( windowBackground != null &&
+				windowBackground.getAlpha() < 255 &&
+				c.getBackground() instanceof UIResource )
+			{
+				// clear root pane background
+				c.setBackground( null );
+			}
+		}
+	}
+
+	private Window getParentWindow( JRootPane c ) {
+		// not using SwingUtilities.windowForComponent() or SwingUtilities.getWindowAncestor()
+		// here because root panes may be nested and used anywhere (e.g. in JInternalFrame)
+		// but we're only interested in the "root" root pane, which is a direct child of the window
+		Container parent = c.getParent();
+		return (parent instanceof Window) ? (Window) parent : null;
+	}
+
 	@Override
 	public void propertyChange( PropertyChangeEvent e ) {
 		super.propertyChange( e );
@@ -359,6 +443,21 @@ public class FlatRootPaneUI
 					titlePane.titleBarColorsChanged();
 				break;
 
+			case FlatClientProperties.FULL_WINDOW_CONTENT:
+				if( titlePane != null ) {
+					rootPane.getLayeredPane().setLayer( titlePane, getLayerForTitlePane() );
+					titlePane.updateIcon();
+					titlePane.updateVisibility();
+					titlePane.updateFullWindowContentButtonsBoundsProperty();
+				}
+				FullWindowContentSupport.revalidatePlaceholders( rootPane );
+				rootPane.revalidate();
+				break;
+
+			case FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_BOUNDS:
+				FullWindowContentSupport.revalidatePlaceholders( rootPane );
+				break;
+
 			case FlatClientProperties.GLASS_PANE_FULL_HEIGHT:
 				rootPane.revalidate();
 				break;
@@ -367,14 +466,43 @@ public class FlatRootPaneUI
 				if( rootPane.isDisplayable() )
 					throw new IllegalComponentStateException( "The client property 'Window.style' must be set before the window becomes displayable." );
 				break;
+
+			case "ancestor":
+				if( e.getNewValue() instanceof Window )
+					macClearBackgroundForTranslucentWindow( rootPane );
+
+				macUninstallWindowBackgroundListener( rootPane );
+				macInstallWindowBackgroundListener( rootPane );
+
+				// FlatNativeMacLibrary.setWindowButtonsSpacing() and
+				// FullWindowContentSupport.macUpdateFullWindowContentButtonsBoundsProperty()
+				// require a native window, but setting the client properties
+				// "apple.awt.fullWindowContent" or FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING
+				// is usually done before the native window is created
+				// --> try again when native window is created
+				if( e.getNewValue() instanceof Window )
+					macInstallFullWindowContentSupport();
+				break;
+
+			case FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING:
+				macInstallFullWindowContentSupport();
+				break;
+
+			case "apple.awt.fullWindowContent":
+				if( SystemInfo.isMacFullWindowContentSupported )
+					FullWindowContentSupport.macUpdateFullWindowContentButtonsBoundsProperty( rootPane );
+				break;
 		}
 	}
 
+	/** @since 3.4 */
+	protected static boolean isFullWindowContent( JRootPane rootPane ) {
+		return FlatClientProperties.clientPropertyBoolean( rootPane, FlatClientProperties.FULL_WINDOW_CONTENT, false );
+	}
+
 	protected static boolean isMenuBarEmbedded( JRootPane rootPane ) {
-		RootPaneUI ui = rootPane.getUI();
+		FlatTitlePane titlePane = getTitlePane( rootPane );
-		return ui instanceof FlatRootPaneUI &&
+		return titlePane != null && titlePane.isMenuBarEmbedded();
-			((FlatRootPaneUI)ui).titlePane != null &&
-			((FlatRootPaneUI)ui).titlePane.isMenuBarEmbedded();
 	}
 
 	/** @since 2.4 */
@@ -410,23 +538,21 @@ public class FlatRootPaneUI
 		private Dimension computeLayoutSize( Container parent, Function<Component, Dimension> getSizeFunc ) {
 			JRootPane rootPane = (JRootPane) parent;
 
-			Dimension titlePaneSize = (titlePane != null)
-				? getSizeFunc.apply( titlePane )
-				: new Dimension();
 			Dimension contentSize = (rootPane.getContentPane() != null)
 				? getSizeFunc.apply( rootPane.getContentPane() )
-				: rootPane.getSize();
+				: rootPane.getSize(); // same as in JRootPane.RootLayout.preferredLayoutSize()
 
 			int width = contentSize.width; // title pane width is not considered here
-			int height = titlePaneSize.height + contentSize.height;
+			int height = contentSize.height;
+			if( titlePane != null && !isFullWindowContent( rootPane ) )
+				height += getSizeFunc.apply( titlePane ).height;
 			if( titlePane == null || !titlePane.isMenuBarEmbedded() ) {
 				JMenuBar menuBar = rootPane.getJMenuBar();
-				Dimension menuBarSize = (menuBar != null && menuBar.isVisible())
+				if( menuBar != null && menuBar.isVisible() ) {
-					? getSizeFunc.apply( menuBar )
+					Dimension menuBarSize = getSizeFunc.apply( menuBar );
-					: new Dimension();
+					width = Math.max( width, menuBarSize.width );
-
+					height += menuBarSize.height;
-				width = Math.max( width, menuBarSize.width );
+				}
-				height += menuBarSize.height;
 			}
 
 			Insets insets = rootPane.getInsets();
@@ -451,12 +577,23 @@ public class FlatRootPaneUI
 			if( rootPane.getLayeredPane() != null )
 				rootPane.getLayeredPane().setBounds( x, y, width, height );
 
-			// title pane
+			// title pane (is a child of layered pane)
 			int nextY = 0;
 			if( titlePane != null ) {
 				int prefHeight = !isFullScreen ? titlePane.getPreferredSize().height : 0;
-				titlePane.setBounds( 0, 0, width, prefHeight );
+				boolean isFullWindowContent = isFullWindowContent( rootPane );
-				nextY += prefHeight;
+				if( isFullWindowContent && !UIManager.getBoolean( FlatTitlePane.KEY_DEBUG_SHOW_RECTANGLES ) ) {
+					// place title bar into top-right corner
+					int tw = Math.min( titlePane.getPreferredSize().width, width );
+					int tx = titlePane.getComponentOrientation().isLeftToRight() ? width - tw : 0;
+					titlePane.setBounds( tx, 0, tw, prefHeight );
+				} else
+					titlePane.setBounds( 0, 0, width, prefHeight );
+
+				titlePane.mouseLayer.setBounds( 0, 0, width, prefHeight );
+
+				if( !isFullWindowContent )
+					nextY += prefHeight;
 			}
 
 			// glass pane
@@ -467,7 +604,7 @@ public class FlatRootPaneUI
 				rootPane.getGlassPane().setBounds( x, y + offset, width, height - offset );
 			}
 
-			// menu bar
+			// menu bar (is a child of layered pane)
 			JMenuBar menuBar = rootPane.getJMenuBar();
 			if( menuBar != null && menuBar.isVisible() ) {
 				boolean embedded = !isFullScreen && titlePane != null && titlePane.isMenuBarEmbedded();
@@ -475,13 +612,23 @@ public class FlatRootPaneUI
 					titlePane.validate();
 					menuBar.setBounds( titlePane.getMenuBarBounds() );
 				} else {
+					int mx = 0;
+					int mw = width;
+					if( titlePane != null && isFullWindowContent( rootPane ) ) {
+						// make menu bar width smaller to avoid that it overlaps title bar buttons
+						int tw = Math.min( titlePane.getPreferredSize().width, width );
+						mw -= tw;
+						if( !titlePane.getComponentOrientation().isLeftToRight() )
+							mx = tw;
+					}
+
 					Dimension prefSize = menuBar.getPreferredSize();
-					menuBar.setBounds( 0, nextY, width, prefSize.height );
+					menuBar.setBounds( mx, nextY, mw, prefSize.height );
 					nextY += prefSize.height;
 				}
 			}
 
-			// content pane
+			// content pane (is a child of layered pane)
 			Container contentPane = rootPane.getContentPane();
 			if( contentPane != null )
 				contentPane.setBounds( 0, nextY, width, Math.max( height - nextY, 0 ) );

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

@@ -84,7 +84,7 @@ import com.formdev.flatlaf.util.UIScale;
  */
 public class FlatSplitPaneUI
 	extends BasicSplitPaneUI
-	implements StyleableUI
+	implements StyleableUI, FlatTitlePane.TitleBarCaptionHitTest
 {
 	@Styleable protected String arrowType;
 	/** @since 3.3 */ @Styleable protected Color draggingColor;
@@ -227,6 +227,15 @@ public class FlatSplitPaneUI
 			((FlatSplitPaneDivider)divider).paintStyle( g, x, y, width, height );
 	}
 
+	//---- interface FlatTitlePane.TitleBarCaptionHitTest ----
+
+	/** @since 3.4 */
+	@Override
+	public Boolean isTitleBarCaptionAt( int x, int y ) {
+		// necessary because BasicSplitPaneDivider adds some mouse listeners for dragging divider
+		return null; // check children
+	}
+
 	//---- class FlatSplitPaneDivider -----------------------------------------
 
 	protected class FlatSplitPaneDivider

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

@@ -182,7 +182,7 @@ import com.formdev.flatlaf.util.UIScale;
  */
 public class FlatTabbedPaneUI
 	extends BasicTabbedPaneUI
-	implements StyleableUI
+	implements StyleableUI, FlatTitlePane.TitleBarCaptionHitTest
 {
 	// tab type
 	/** @since 2 */ protected static final int TAB_TYPE_UNDERLINED = 0;
@@ -2300,6 +2300,17 @@ debug*/
 		return (rects[last].y + rects[last].height) - rects[0].y;
 	}
 
+	//---- interface FlatTitlePane.TitleBarCaptionHitTest ----
+
+	/** @since 3.4 */
+	@Override
+	public Boolean isTitleBarCaptionAt( int x, int y ) {
+		if( tabForCoordinate( tabPane, x, y ) >= 0 )
+			return false;
+
+		return null; // check children
+	}
+
 	//---- class TabCloseButton -----------------------------------------------
 
 	private static class TabCloseButton
@@ -3985,10 +3996,8 @@ debug*/
 	//---- class RunWithOriginalLayoutManagerDelegateAction -------------------
 
 	private static class RunWithOriginalLayoutManagerDelegateAction
-		implements Action
+		extends FlatUIAction
 	{
-		private final Action delegate;
-
 		static void install( ActionMap map, String key ) {
 			Action oldAction = map.get( key );
 			if( oldAction == null || oldAction instanceof RunWithOriginalLayoutManagerDelegateAction )
@@ -3998,24 +4007,9 @@ debug*/
 		}
 
 		private RunWithOriginalLayoutManagerDelegateAction( Action delegate ) {
-			this.delegate = delegate;
+			super( delegate );
 		}
 
-		@Override
-		public Object getValue( String key ) {
-			return delegate.getValue( key );
-		}
-
-		@Override
-		public boolean isEnabled() {
-			return delegate.isEnabled();
-		}
-
-		@Override public void putValue( String key, Object value ) {}
-		@Override public void setEnabled( boolean b ) {}
-		@Override public void addPropertyChangeListener( PropertyChangeListener listener ) {}
-		@Override public void removePropertyChangeListener( PropertyChangeListener listener ) {}
-
 		@Override
 		public void actionPerformed( ActionEvent e ) {
 			JTabbedPane tabbedPane = (JTabbedPane) e.getSource();

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

@@ -24,15 +24,19 @@ import java.awt.EventQueue;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Insets;
+import java.awt.event.ActionEvent;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
 import java.awt.geom.Rectangle2D;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.util.Map;
+import javax.swing.Action;
+import javax.swing.ActionMap;
 import javax.swing.JComponent;
 import javax.swing.JScrollPane;
 import javax.swing.JTable;
+import javax.swing.JTextField;
 import javax.swing.JViewport;
 import javax.swing.LookAndFeel;
 import javax.swing.SwingConstants;
@@ -89,6 +93,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Table.selectionInactiveBackground			Color
  * @uiDefault Table.selectionInactiveForeground			Color
  * @uiDefault Table.paintOutsideAlternateRows			boolean
+ * @uiDefault Table.editorSelectAllOnStartEditing		boolean
  *
  * <!-- FlatTableCellBorder -->
  *
@@ -284,6 +289,18 @@ public class FlatTableUI
 		};
 	}
 
+	@Override
+	protected void installKeyboardActions() {
+		super.installKeyboardActions();
+
+		if( UIManager.getBoolean( "Table.editorSelectAllOnStartEditing" ) ) {
+			// get shared action map, used for all tables
+			ActionMap map = SwingUtilities.getUIActionMap( table );
+			if( map != null )
+				StartEditingAction.install( map, "startEditing" );
+		}
+	}
+
 	/** @since 2 */
 	protected void installStyle() {
 		try {
@@ -579,4 +596,36 @@ public class FlatTableUI
 			selected = (value != null && (Boolean) value);
 		}
 	}
+
+	//---- class StartEditingAction -------------------------------------------
+
+	private static class StartEditingAction
+		extends FlatUIAction
+	{
+		static void install( ActionMap map, String key ) {
+			Action oldAction = map.get( key );
+			if( oldAction == null || oldAction instanceof StartEditingAction )
+				return; // not found or already installed
+
+			map.put( key, new StartEditingAction( oldAction ) );
+		}
+
+		private StartEditingAction( Action delegate ) {
+			super( delegate );
+		}
+
+		@Override
+		public void actionPerformed( ActionEvent e ) {
+			JTable table = (JTable) e.getSource();
+
+			Component oldEditorComp = table.getEditorComponent();
+
+			delegate.actionPerformed( e );
+
+			// select all text in editor if editing starts with F2 key
+			Component editorComp = table.getEditorComponent();
+			if( oldEditorComp == null && editorComp instanceof JTextField )
+				((JTextField)editorComp).selectAll();
+		}
+	}
 }

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

@@ -36,6 +36,7 @@ import java.awt.Rectangle;
 import java.awt.Toolkit;
 import java.awt.Window;
 import java.awt.event.ActionListener;
+import java.awt.event.ComponentAdapter;
 import java.awt.event.ComponentEvent;
 import java.awt.event.ComponentListener;
 import java.awt.event.MouseEvent;
@@ -46,9 +47,9 @@ import java.awt.event.WindowEvent;
 import java.awt.geom.AffineTransform;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
+import java.util.function.Function;
 import javax.accessibility.AccessibleContext;
 import javax.swing.BorderFactory;
 import javax.swing.Box;
@@ -57,7 +58,6 @@ import javax.swing.Icon;
 import javax.swing.JButton;
 import javax.swing.JComponent;
 import javax.swing.JDialog;
-import javax.swing.JInternalFrame;
 import javax.swing.JLabel;
 import javax.swing.JMenuBar;
 import javax.swing.JPanel;
@@ -66,6 +66,7 @@ import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
 import javax.swing.border.AbstractBorder;
 import javax.swing.border.Border;
+import javax.swing.plaf.ComponentUI;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.FlatSystemProperties;
 import com.formdev.flatlaf.ui.FlatNativeWindowBorder.WindowTopBorder;
@@ -98,7 +99,6 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault TitlePane.showIconBesideTitle					boolean
  * @uiDefault TitlePane.menuBarTitleGap						int
  * @uiDefault TitlePane.menuBarTitleMinimumGap				int
- * @uiDefault TitlePane.menuBarResizeHeight					int
  * @uiDefault TitlePane.closeIcon							Icon
  * @uiDefault TitlePane.iconifyIcon							Icon
  * @uiDefault TitlePane.maximizeIcon						Icon
@@ -109,7 +109,7 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatTitlePane
 	extends JComponent
 {
-	private static final String KEY_DEBUG_SHOW_RECTANGLES = "FlatLaf.debug.titlebar.showRectangles";
+	static final String KEY_DEBUG_SHOW_RECTANGLES = "FlatLaf.debug.titlebar.showRectangles";
 
 	/** @since 2.5 */ protected final Font titleFont;
 	protected final Color activeBackground;
@@ -131,7 +131,6 @@ public class FlatTitlePane
 	/** @since 2.4 */ protected final boolean showIconBesideTitle;
 	protected final int menuBarTitleGap;
 	/** @since 2.4 */ protected final int menuBarTitleMinimumGap;
-	/** @since 2.4 */ protected final int menuBarResizeHeight;
 
 	protected final JRootPane rootPane;
 	protected final String windowStyle;
@@ -150,6 +149,23 @@ public class FlatTitlePane
 
 	private final Handler handler;
 
+	/**
+	 * This panel handles mouse events if FlatLaf window decorations are used
+	 * without native window border. E.g. on Linux.
+	 * <p>
+	 * This panel usually has same bounds as the title pane,
+	 * except if fullWindowContent mode is enabled.
+	 * <p>
+	 * This panel is not a child of the title pane.
+	 * Instead it is added by FlatRootPaneUI to the layered pane at a layer
+	 * under the title pane and under the frame content.
+	 * The separation is necessary for fullWindowContent mode, where the title pane
+	 * is layered over the frame content (for title pane buttons), but the mousePanel
+	 * needs to be layered under the frame content so that components on content pane
+	 * can receive mouse events when located in title area.
+	 */
+	final JPanel mouseLayer;
+
 	public FlatTitlePane( JRootPane rootPane ) {
 		this.rootPane = rootPane;
 
@@ -178,7 +194,6 @@ public class FlatTitlePane
 		showIconBesideTitle = FlatUIUtils.getSubUIBoolean( "TitlePane.showIconBesideTitle", windowStyle, false );
 		menuBarTitleGap = FlatUIUtils.getSubUIInt( "TitlePane.menuBarTitleGap", windowStyle, 40 );
 		menuBarTitleMinimumGap = FlatUIUtils.getSubUIInt( "TitlePane.menuBarTitleMinimumGap", windowStyle, 12 );
-		menuBarResizeHeight = FlatUIUtils.getSubUIInt( "TitlePane.menuBarResizeHeight", windowStyle, 4 );
 
 
 		handler = createHandler();
@@ -187,11 +202,10 @@ public class FlatTitlePane
 		addSubComponents();
 		activeChanged( true );
 
-		addMouseListener( handler );
+		mouseLayer = new JPanel();
-		addMouseMotionListener( handler );
+		mouseLayer.setOpaque( false );
-
+		mouseLayer.addMouseListener( handler );
-		// necessary for closing window with double-click on icon
+		mouseLayer.addMouseMotionListener( handler );
-		iconLabel.addMouseListener( handler );
 
 		applyComponentOrientation( rootPane.getComponentOrientation() );
 	}
@@ -234,6 +248,11 @@ public class FlatTitlePane
 		setLayout( new BorderLayout() {
 			@Override
 			public void layoutContainer( Container target ) {
+				if( isFullWindowContent() ) {
+					super.layoutContainer( target );
+					return;
+				}
+
 				// compute available bounds
 				Insets insets = target.getInsets();
 				int x = insets.left;
@@ -247,7 +266,7 @@ public class FlatTitlePane
 				int titleWidth = w - leftWidth - buttonsWidth;
 				int minTitleWidth = UIScale.scale( titleMinimumWidth );
 
-				// increase minimum width if icon is show besides the title
+				// increase minimum width if icon is shown besides the title
 				Icon icon = titleLabel.getIcon();
 				if( icon != null ) {
 					Insets iconInsets = iconLabel.getInsets();
@@ -295,6 +314,9 @@ public class FlatTitlePane
 							horizontalGlue.getWidth(), titleLabel.getHeight() );
 					}
 				}
+
+				// clear hit-test cache
+				lastCaptionHitTestTime = 0;
 			}
 		} );
 
@@ -338,6 +360,13 @@ public class FlatTitlePane
 			buttonPanel.add( restoreButton );
 		}
 		buttonPanel.add( closeButton );
+
+		ComponentListener l = new ComponentAdapter() {
+			@Override public void componentResized( ComponentEvent e ) { updateFullWindowContentButtonsBoundsProperty(); }
+			@Override public void componentMoved( ComponentEvent e ) { updateFullWindowContentButtonsBoundsProperty(); }
+		};
+		buttonPanel.addComponentListener( l );
+		addComponentListener( l );
 	}
 
 	protected JButton createButton( String iconKey, String accessibleName, ActionListener action ) {
@@ -417,7 +446,9 @@ public class FlatTitlePane
 
 	/** @since 3 */
 	protected void updateVisibility() {
-		titleLabel.setVisible( clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_TITLE, true ) );
+		boolean isFullWindowContent = isFullWindowContent();
+		leftPanel.setVisible( !isFullWindowContent );
+		titleLabel.setVisible( clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_TITLE, true ) && !isFullWindowContent );
 		closeButton.setVisible( clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_CLOSE, true ) );
 
 		if( window instanceof Frame ) {
@@ -443,7 +474,7 @@ public class FlatTitlePane
 
 		// get window images
 		List<Image> images = null;
-		if( clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_ICON, defaultShowIcon ) ) {
+		if( clientPropertyBoolean( rootPane, TITLE_BAR_SHOW_ICON, defaultShowIcon ) && !isFullWindowContent() ) {
 			images = window.getIconImages();
 			if( images.isEmpty() ) {
 				// search in owners
@@ -468,6 +499,13 @@ public class FlatTitlePane
 		updateNativeTitleBarHeightAndHitTestSpotsLater();
 	}
 
+	void updateFullWindowContentButtonsBoundsProperty() {
+		Rectangle bounds = isFullWindowContent()
+			? new Rectangle( SwingUtilities.convertPoint( buttonPanel, 0, 0, rootPane ), buttonPanel.getSize() )
+			: null;
+		rootPane.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_BOUNDS, bounds );
+	}
+
 	@Override
 	public void addNotify() {
 		super.addNotify();
@@ -522,6 +560,11 @@ public class FlatTitlePane
 		window.removeComponentListener( handler );
 	}
 
+	/** @since 3.4 */
+	protected boolean isFullWindowContent() {
+		return FlatRootPaneUI.isFullWindowContent( rootPane );
+	}
+
 	/**
 	 * Returns whether this title pane currently has a visible and embedded menubar.
 	 */
@@ -533,6 +576,9 @@ public class FlatTitlePane
 	 * Returns whether the menubar should be embedded into the title pane.
 	 */
 	protected boolean isMenuBarEmbedded() {
+		if( isFullWindowContent() )
+			return false;
+
 		// not storing value of "TitlePane.menuBarEmbedded" in class to allow changing at runtime
 		return FlatUIUtils.getBoolean( rootPane,
 			FlatSystemProperties.MENUBAR_EMBEDDED,
@@ -620,21 +666,45 @@ public class FlatTitlePane
 			return;
 
 		if( debugTitleBarHeight > 0 ) {
+			// title bar height is measured from window top edge
+			int y = SwingUtilities.convertPoint( window, 0, debugTitleBarHeight, this ).y;
 			g.setColor( Color.green );
-			g.drawLine( 0, debugTitleBarHeight, getWidth(), debugTitleBarHeight );
+			g.drawLine( 0, y, getWidth(), y );
 		}
-		if( debugHitTestSpots != null ) {
+
-			for( Rectangle r : debugHitTestSpots )
+		g.setColor( Color.red );
-				paintRect( g, Color.red, r );
+		debugPaintComponentWithMouseListener( g, Color.red, rootPane.getLayeredPane(), 0, 0 );
-		}
+
-		paintRect( g, Color.cyan, debugCloseButtonBounds );
+		debugPaintRect( g, Color.blue, debugAppIconBounds );
-		paintRect( g, Color.blue, debugAppIconBounds );
+		debugPaintRect( g, Color.blue, debugMinimizeButtonBounds );
-		paintRect( g, Color.blue, debugMinimizeButtonBounds );
+		debugPaintRect( g, Color.magenta, debugMaximizeButtonBounds );
-		paintRect( g, Color.magenta, debugMaximizeButtonBounds );
+		debugPaintRect( g, Color.cyan, debugCloseButtonBounds );
-		paintRect( g, Color.cyan, debugCloseButtonBounds );
 	}
 
-	private void paintRect( Graphics g, Color color, Rectangle r ) {
+	private void debugPaintComponentWithMouseListener( Graphics g, Color color, Component c, int x, int y ) {
+		if( !c.isDisplayable() || !c.isVisible() || c == mouseLayer ||
+			c == iconifyButton || c == maximizeButton || c == restoreButton || c == closeButton )
+		  return;
+
+		if( c.getMouseListeners().length > 0 ||
+			c.getMouseMotionListeners().length > 0 ||
+			c.getMouseWheelListeners().length > 0 )
+		{
+			g.drawRect( x, y, c.getWidth(), c.getHeight() );
+			return;
+		}
+
+		if( c instanceof Container ) {
+			Rectangle titlePaneBoundsOnWindow = SwingUtilities.convertRectangle( this, new Rectangle( getSize() ), window );
+			for( Component child : ((Container)c).getComponents() ) {
+				Rectangle compBoundsOnWindow = SwingUtilities.convertRectangle( c, new Rectangle( c.getSize() ), window );
+				if( compBoundsOnWindow.intersects( titlePaneBoundsOnWindow ) )
+					debugPaintComponentWithMouseListener( g, color, child, x + child.getX(), y + child.getY() );
+			}
+		}
+	}
+
+	private void debugPaintRect( Graphics g, Color color, Rectangle r ) {
 		if( r == null )
 			return;
 
@@ -645,6 +715,9 @@ public class FlatTitlePane
 
 	@Override
 	protected void paintComponent( Graphics g ) {
+		if( isFullWindowContent() )
+			return;
+
 		// not storing value of "TitlePane.unifiedBackground" in class to allow changing at runtime
 		g.setColor( (UIManager.getBoolean( "TitlePane.unifiedBackground" ) &&
 				clientPropertyColor( rootPane, TITLE_BAR_BACKGROUND, null ) == null)
@@ -866,11 +939,14 @@ public class FlatTitlePane
 			return;
 
 		int titleBarHeight = getHeight();
+		// title bar height must be measured from window top edge
+		// (when window is maximized, window y location is e.g. -11 and window top inset is 11)
+		for( Component c = this; c != window && c != null; c = c.getParent() )
+			titleBarHeight += c.getY();
 		// slightly reduce height so that component receives mouseExit events
 		if( titleBarHeight > 0 )
 			titleBarHeight--;
 
-		List<Rectangle> hitTestSpots = new ArrayList<>();
 		Rectangle appIconBounds = null;
 
 		if( !showIconBesideTitle && iconLabel.isVisible() ) {
@@ -928,71 +1004,17 @@ public class FlatTitlePane
 			}
 		}
 
-		Rectangle r = getNativeHitTestSpot( buttonPanel );
-		if( r != null )
-			hitTestSpots.add( r );
-
-		JMenuBar menuBar = rootPane.getJMenuBar();
-		if( hasVisibleEmbeddedMenuBar( menuBar ) ) {
-			r = getNativeHitTestSpot( menuBar );
-			if( r != null ) {
-				// 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;
-				}
-
-				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.
-
-						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 = 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( r );
-			}
-		}
-
-		// allow internal frames in layered pane to be moved/resized when placed over title bar
-		for( Component c : rootPane.getLayeredPane().getComponents() ) {
-			r = (c instanceof JInternalFrame) ? getNativeHitTestSpot( (JInternalFrame) c ) : null;
-			if( r != null )
-				hitTestSpots.add( r );
-		}
-
 		Rectangle minimizeButtonBounds = boundsInWindow( iconifyButton );
 		Rectangle maximizeButtonBounds = boundsInWindow( maximizeButton.isVisible() ? maximizeButton : restoreButton );
 		Rectangle closeButtonBounds = boundsInWindow( closeButton );
 
+		// clear hit-test cache
+		lastCaptionHitTestTime = 0;
+
 		FlatNativeWindowBorder.setTitleBarHeightAndHitTestSpots( window, titleBarHeight,
-			hitTestSpots, appIconBounds, minimizeButtonBounds, maximizeButtonBounds, closeButtonBounds );
+			this::captionHitTest, appIconBounds, minimizeButtonBounds, maximizeButtonBounds, closeButtonBounds );
 
 		debugTitleBarHeight = titleBarHeight;
-		debugHitTestSpots = hitTestSpots;
 		debugAppIconBounds = appIconBounds;
 		debugMinimizeButtonBounds = minimizeButtonBounds;
 		debugMaximizeButtonBounds = maximizeButtonBounds;
@@ -1007,18 +1029,101 @@ public class FlatTitlePane
 			: null;
 	}
 
-	protected Rectangle getNativeHitTestSpot( JComponent c ) {
+	/**
-		Dimension size = c.getSize();
+	 * Returns whether there is a component at the given location, that processes
-		if( size.width <= 0 || size.height <= 0 )
+	 * mouse events. E.g. buttons, menus, etc.
-			return null;
+	 * <p>
+	 * Note:
+	 * <ul>
+	 *   <li>This method is invoked often when mouse is moved over title bar
+	 *       and should therefore return quickly.
+	 *   <li>This method is invoked on 'AWT-Windows' thread (not 'AWT-EventQueue' thread)
+	 *       while processing Windows messages.
+	 * </ul>
+	 */
+	private boolean captionHitTest( Point pt ) {
+		// Windows invokes this method every ~200ms, even if the mouse has not moved
+		long time = System.currentTimeMillis();
+		if( pt.x == lastCaptionHitTestX && pt.y == lastCaptionHitTestY && time < lastCaptionHitTestTime + 300 ) {
+			lastCaptionHitTestTime = time;
+			return lastCaptionHitTestResult;
+		}
 
-		Point location = SwingUtilities.convertPoint( c, 0, 0, window );
+		// convert pt from window coordinates to layeredPane coordinates
-		Rectangle r = new Rectangle( location, size );
+		Component layeredPane = rootPane.getLayeredPane();
-		return r;
+		int x = pt.x;
+		int y = pt.y;
+		for( Component c = layeredPane; c != window && c != null; c = c.getParent() ) {
+			x -= c.getX();
+			y -= c.getY();
+		}
+
+		lastCaptionHitTestX = pt.x;
+		lastCaptionHitTestY = pt.y;
+		lastCaptionHitTestTime = time;
+		lastCaptionHitTestResult = isTitleBarCaptionAt( layeredPane, x, y );
+		return lastCaptionHitTestResult;
 	}
 
+	private boolean isTitleBarCaptionAt( Component c, int x, int y ) {
+		if( !c.isDisplayable() || !c.isVisible() || !c.contains( x, y ) || c == mouseLayer )
+			return true; // continue checking with next component
+
+		if( c.isEnabled() &&
+			(c.getMouseListeners().length > 0 ||
+			 c.getMouseMotionListeners().length > 0) )
+		{
+			if( !(c instanceof JComponent) )
+				return false; // assume that this is not a caption because the component has mouse listeners
+
+			// check client property boolean value
+			Object caption = ((JComponent)c).getClientProperty( COMPONENT_TITLE_BAR_CAPTION );
+			if( caption instanceof Boolean )
+				return (boolean) caption;
+
+			// if component is not fully layouted, do not invoke function
+			// because it is too dangerous that the function tries to layout the component,
+			// which could cause a dead lock
+			if( !c.isValid() )
+				return false; // assume that this is not a caption because the component has mouse listeners
+
+			if( caption instanceof Function ) {
+				// check client property function value
+				@SuppressWarnings( "unchecked" )
+				Function<Point, Boolean> hitTest = (Function<Point, Boolean>) caption;
+				Boolean result = hitTest.apply( new Point( x, y ) );
+				if( result != null )
+					return result;
+			} else {
+				// check component UI
+				ComponentUI ui = JavaCompatibility2.getUI( (JComponent) c );
+				if( !(ui instanceof TitleBarCaptionHitTest) )
+					return false; // assume that this is not a caption because the component has mouse listeners
+
+				Boolean result = ((TitleBarCaptionHitTest)ui).isTitleBarCaptionAt( x, y );
+				if( result != null )
+					return result;
+			}
+
+			// else continue checking children
+		}
+
+		// check children
+		if( c instanceof Container ) {
+			for( Component child : ((Container)c).getComponents() ) {
+				if( !isTitleBarCaptionAt( child, x - child.getX(), y - child.getY() ) )
+					return false;
+			}
+		}
+		return true;
+	}
+
+	private int lastCaptionHitTestX;
+	private int lastCaptionHitTestY;
+	private long lastCaptionHitTestTime;
+	private boolean lastCaptionHitTestResult;
+
 	private int debugTitleBarHeight;
-	private List<Rectangle> debugHitTestSpots;
 	private Rectangle debugAppIconBounds;
 	private Rectangle debugMinimizeButtonBounds;
 	private Rectangle debugMaximizeButtonBounds;
@@ -1116,7 +1221,7 @@ public class FlatTitlePane
 				}
 			}
 
-			// compute icon width and gap (if icon is show besides the title)
+			// compute icon width and gap (if icon is shown besides the title)
 			int iconTextGap = 0;
 			int iconWidthAndGap = 0;
 			if( icon != null ) {
@@ -1125,7 +1230,7 @@ public class FlatTitlePane
 				iconWidthAndGap = icon.getIconWidth() + iconTextGap;
 			}
 
-			// layout title and icon (if show besides the title)
+			// layout title and icon (if shown besides the title)
 			String clippedText = SwingUtilities.layoutCompoundLabel( label, fontMetrics, text, icon,
 				label.getVerticalAlignment(), label.getHorizontalAlignment(),
 				label.getVerticalTextPosition(), label.getHorizontalTextPosition(),
@@ -1275,7 +1380,7 @@ debug*/
 			}
 
 			if( e.getClickCount() == 2 && SwingUtilities.isLeftMouseButton( e ) ) {
-				if( e.getSource() == iconLabel ) {
+				if( SwingUtilities.getDeepestComponentAt( FlatTitlePane.this, e.getX(), e.getY() ) == iconLabel ) {
 					// double-click on icon closes window
 					close();
 				} else if( !hasNativeCustomDecoration() ) {
@@ -1302,7 +1407,7 @@ debug*/
 			if( !SwingUtilities.isLeftMouseButton( e ) )
 				return;
 
-			dragOffset = SwingUtilities.convertPoint( FlatTitlePane.this, e.getPoint(), window );
+			dragOffset = SwingUtilities.convertPoint( mouseLayer, e.getPoint(), window );
 			linuxNativeMove = false;
 
 			// on Linux, move or maximize/restore window
@@ -1415,4 +1520,27 @@ debug*/
 		@Override public void componentMoved( ComponentEvent e ) {}
 		@Override public void componentHidden( ComponentEvent e ) {}
 	}
+
+	//---- interface TitleBarCaptionHitTest -----------------------------------
+
+	/**
+	 * For custom components use {@link FlatClientProperties#COMPONENT_TITLE_BAR_CAPTION}
+	 * instead of this interface.
+	 *
+	 * @since 3.4
+	 */
+	public interface TitleBarCaptionHitTest {
+		/**
+		 * Invoked for a component that is enabled and has mouse listeners,
+		 * to check whether it processes mouse input at the given x/y location.
+		 * Useful for components that do not use mouse input on whole component bounds.
+		 * E.g. a tabbed pane with a few tabs has some empty space beside the tabs
+		 * that can be used to move the window.
+		 *
+		 * @return {@code true} if the component is not interested in mouse input at the given location
+		 *         {@code false} if the component wants process mouse input at the given location
+		 *         {@code null} if the component children should be checked
+		 */
+		Boolean isTitleBarCaptionAt( int x, int y );
+	}
 }

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

@@ -82,7 +82,7 @@ import com.formdev.flatlaf.util.UIScale;
  */
 public class FlatToolBarUI
 	extends BasicToolBarUI
-	implements StyleableUI
+	implements StyleableUI, FlatTitlePane.TitleBarCaptionHitTest
 {
 	/** @since 1.4 */ @Styleable protected boolean focusableButtons;
 	/** @since 2 */ @Styleable protected boolean arrowKeysOnlyNavigation;
@@ -453,6 +453,15 @@ public class FlatToolBarUI
 			: null;
 	}
 
+	//---- interface FlatTitlePane.TitleBarCaptionHitTest ----
+
+	/** @since 3.4 */
+	@Override
+	public Boolean isTitleBarCaptionAt( int x, int y ) {
+		// necessary because BasicToolBarUI adds some mouse listeners for dragging when toolbar is floatable
+		return null; // check children
+	}
+
 	//---- class FlatToolBarFocusTraversalPolicy ------------------------------
 
 	/**

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

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2024 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://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.beans.PropertyChangeListener;
+import javax.swing.Action;
+
+/**
+ * Base class for UI actions used in ActionMap.
+ * (similar to class sun.swing.UIAction)
+ *
+ * @author Karl Tauber
+ * @since 3.4
+ */
+public abstract class FlatUIAction
+	implements Action
+{
+	protected final String name;
+	protected final Action delegate;
+
+	protected FlatUIAction( String name ) {
+		this.name = name;
+		this.delegate = null;
+	}
+
+	protected FlatUIAction( Action delegate ) {
+		this.name = null;
+		this.delegate = delegate;
+	}
+
+	@Override
+	public Object getValue( String key ) {
+		if( key == NAME && delegate == null )
+			return name;
+		return (delegate != null) ? delegate.getValue( key ) : null;
+	}
+
+	@Override
+	public boolean isEnabled() {
+		return (delegate != null) ? delegate.isEnabled() : true;
+	}
+
+	// do nothing in following methods because this class is immutable
+	@Override public void putValue( String key, Object value ) {}
+	@Override public void setEnabled( boolean b ) {}
+	@Override public void addPropertyChangeListener( PropertyChangeListener listener ) {}
+	@Override public void removePropertyChangeListener( PropertyChangeListener listener ) {}
+}

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

@@ -60,6 +60,7 @@ import javax.swing.border.Border;
 import javax.swing.border.CompoundBorder;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.UIResource;
+import javax.swing.tree.DefaultTreeCellEditor;
 import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.FlatIntelliJLaf;
 import com.formdev.flatlaf.FlatLaf;
@@ -304,6 +305,10 @@ public class FlatUIUtils
 		if( parent instanceof JTable && ((JTable)parent).getEditorComponent() == c )
 			return true;
 
+		// check whether used as tree cell editor
+		if( parent instanceof DefaultTreeCellEditor.EditorContainer )
+			return true;
+
 		// check whether used as cell editor
 		//   Table.editor is set in JTable.GenericEditor constructor
 		//   Tree.cellEditor is set in sun.swing.FilePane.editFileName()

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

@@ -29,8 +29,8 @@ import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.util.Collections;
 import java.util.IdentityHashMap;
-import java.util.List;
 import java.util.Map;
+import java.util.function.Predicate;
 import javax.swing.JDialog;
 import javax.swing.JFrame;
 import javax.swing.Timer;
@@ -159,7 +159,7 @@ class FlatWindowsNativeWindowBorder
 	}
 
 	@Override
-	public void updateTitleBarInfo( Window window, int titleBarHeight, List<Rectangle> hitTestSpots,
+	public void updateTitleBarInfo( Window window, int titleBarHeight, Predicate<Point> captionHitTestCallback,
 		Rectangle appIconBounds, Rectangle minimizeButtonBounds, Rectangle maximizeButtonBounds,
 		Rectangle closeButtonBounds )
 	{
@@ -168,7 +168,7 @@ class FlatWindowsNativeWindowBorder
 			return;
 
 		wndProc.titleBarHeight = titleBarHeight;
-		wndProc.hitTestSpots = hitTestSpots.toArray( new Rectangle[hitTestSpots.size()] );
+		wndProc.captionHitTestCallback = captionHitTestCallback;
 		wndProc.appIconBounds = cloneRectange( appIconBounds );
 		wndProc.minimizeButtonBounds = cloneRectange( minimizeButtonBounds );
 		wndProc.maximizeButtonBounds = cloneRectange( maximizeButtonBounds );
@@ -288,8 +288,8 @@ class FlatWindowsNativeWindowBorder
 		private final long hwnd;
 
 		// Swing coordinates/values may be scaled on a HiDPI screen
-		private int titleBarHeight;
+		private int titleBarHeight; // measured from window top edge, which may be out-of-screen if maximized
-		private Rectangle[] hitTestSpots;
+		private Predicate<Point> captionHitTestCallback;
 		private Rectangle appIconBounds;
 		private Rectangle minimizeButtonBounds;
 		private Rectangle maximizeButtonBounds;
@@ -340,50 +340,61 @@ class FlatWindowsNativeWindowBorder
 		private int onNcHitTest( int x, int y, boolean isOnResizeBorder ) {
 			// scale-down mouse x/y because Swing coordinates/values may be scaled on a HiDPI screen
 			Point pt = scaleDown( x, y );
-			int sx = pt.x;
-			int sy = pt.y;
 
 			// return HTSYSMENU if mouse is over application icon
 			//   - left-click on HTSYSMENU area shows system menu
 			//   - double-left-click sends WM_CLOSE
-			if( contains( appIconBounds, sx, sy ) )
+			if( contains( appIconBounds, pt ) )
 				return HTSYSMENU;
 
 			// return HTMINBUTTON if mouse is over minimize button
 			//   - hovering mouse over HTMINBUTTON area shows tooltip on Windows 10/11
-			if( contains( minimizeButtonBounds, sx, sy ) )
+			if( contains( minimizeButtonBounds, pt ) )
 				return HTMINBUTTON;
 
 			// return HTMAXBUTTON if mouse is over maximize/restore button
 			//   - hovering mouse over HTMAXBUTTON area shows tooltip on Windows 10
 			//   - hovering mouse over HTMAXBUTTON area shows snap layouts menu on Windows 11
 			//     https://docs.microsoft.com/en-us/windows/apps/desktop/modernize/apply-snap-layout-menu
-			if( contains( maximizeButtonBounds, sx, sy ) )
+			if( contains( maximizeButtonBounds, pt ) )
 				return HTMAXBUTTON;
 
 			// return HTCLOSE if mouse is over close button
 			//   - hovering mouse over HTCLOSE area shows tooltip on Windows 10/11
-			if( contains( closeButtonBounds, sx, sy ) )
+			if( contains( closeButtonBounds, pt ) )
 				return HTCLOSE;
 
-			boolean isOnTitleBar = (sy < titleBarHeight);
+			// return HTTOP if mouse is over top resize border
+			//   - hovering mouse shows vertical resize cursor
+			//   - left-click and drag vertically resizes window
+			if( isOnResizeBorder )
+				return HTTOP;
 
+			boolean isOnTitleBar = (pt.y < titleBarHeight);
 			if( isOnTitleBar ) {
-				// use a second reference to the array to avoid that it can be changed
+				// return HTCLIENT if mouse is over any Swing component in title bar
-				// in another thread while processing the array
+				// that processes mouse events (e.g. buttons, menus, etc)
-				Rectangle[] hitTestSpots2 = hitTestSpots;
+				//   - Windows ignores mouse events in this area
-				for( Rectangle spot : hitTestSpots2 ) {
+				try {
-					if( spot.contains( sx, sy ) )
+					if( captionHitTestCallback != null && !captionHitTestCallback.test( pt ) )
 						return HTCLIENT;
+				} catch( Throwable ex ) {
+					// ignore
 				}
-				return isOnResizeBorder ? HTTOP : HTCAPTION;
+
+				// return HTCAPTION if mouse is over title bar
+				//   - right-click shows system menu
+				//   - double-left-click maximizes/restores window size
+				return HTCAPTION;
 			}
 
-			return isOnResizeBorder ? HTTOP : HTCLIENT;
+			// return HTCLIENT
+			//   - Windows ignores mouse events in this area
+			return HTCLIENT;
 		}
 
-		private boolean contains( Rectangle rect, int x, int y ) {
+		private boolean contains( Rectangle rect, Point pt ) {
-			return (rect != null && rect.contains( x, y ) );
+			return (rect != null && rect.contains( pt ) );
 		}
 
 		/**

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

@@ -0,0 +1,219 @@
+/*
+ * Copyright 2024 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.Graphics;
+import java.awt.Rectangle;
+import java.awt.Window;
+import java.awt.event.ComponentAdapter;
+import java.awt.event.ComponentEvent;
+import java.awt.event.ComponentListener;
+import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.Iterator;
+import javax.swing.JComponent;
+import javax.swing.JRootPane;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.util.SystemInfo;
+
+/**
+ * @author Karl Tauber
+ */
+class FullWindowContentSupport
+{
+	private static final String KEY_DEBUG_SHOW_PLACEHOLDERS = "FlatLaf.debug.panel.showPlaceholders";
+
+	private static ArrayList<WeakReference<JComponent>> placeholders = new ArrayList<>();
+
+	static Dimension getPlaceholderPreferredSize( JComponent c, String options ) {
+		JRootPane rootPane;
+		Rectangle bounds;
+
+		if( !options.startsWith( SystemInfo.isMacOS ? "mac" : "win" ) ||
+			!c.isDisplayable() ||
+			(rootPane = SwingUtilities.getRootPane( c )) == null ||
+			(bounds = (Rectangle) rootPane.getClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_BOUNDS )) == null )
+		  return new Dimension( 0, 0 );
+
+		if( options.length() > 3 ) {
+			if( (options.contains( "leftToRight" ) && !c.getComponentOrientation().isLeftToRight()) ||
+				(options.contains( "rightToLeft" ) && c.getComponentOrientation().isLeftToRight()) )
+			  return new Dimension( 0, 0 );
+		}
+
+		// On macOS, the client property is updated very late when toggling full screen,
+		// which results in "jumping" layout after full screen toggle finished.
+		// To avoid that, get up-to-date buttons bounds from macOS.
+		if( SystemInfo.isMacFullWindowContentSupported && FlatNativeMacLibrary.isLoaded() ) {
+			Rectangle r = FlatNativeMacLibrary.getWindowButtonsBounds( SwingUtilities.windowForComponent( c ) );
+			if( r != null )
+				bounds = r;
+		}
+
+		int width = bounds.width;
+		int height = bounds.height;
+
+		if( options.length() > 3 ) {
+			if( width == 0 && options.contains( "zeroInFullScreen" ) )
+				height = 0;
+
+			if( options.contains( "horizontal" ) )
+				height = 0;
+			if( options.contains( "vertical" ) )
+				width = 0;
+		}
+
+		return new Dimension( width, height );
+	}
+
+	static void registerPlaceholder( JComponent c ) {
+		synchronized( placeholders ) {
+			if( indexOfPlaceholder( c ) < 0 )
+				placeholders.add( new WeakReference<>( c ) );
+		}
+	}
+
+	static void unregisterPlaceholder( JComponent c ) {
+		synchronized( placeholders ) {
+			int index = indexOfPlaceholder( c );
+			if( index >= 0 )
+				placeholders.remove( index );
+		}
+	}
+
+	private static int indexOfPlaceholder( JComponent c ) {
+		int size = placeholders.size();
+		for( int i = 0; i < size; i++ ) {
+			if( placeholders.get( i ).get() == c )
+				return i;
+		}
+		return -1;
+	}
+
+	static void revalidatePlaceholders( Component container ) {
+		synchronized( placeholders ) {
+			if( placeholders.isEmpty() )
+				return;
+
+			for( Iterator<WeakReference<JComponent>> it = placeholders.iterator(); it.hasNext(); ) {
+				WeakReference<JComponent> ref = it.next();
+				JComponent c = ref.get();
+
+				// remove already released placeholder
+				if( c == null ) {
+					it.remove();
+					continue;
+				}
+
+				// revalidate placeholder if is in given container
+				if( SwingUtilities.isDescendingFrom( c, container ) )
+					c.revalidate();
+			}
+		}
+	}
+
+	static ComponentListener macInstallListeners( JRootPane rootPane ) {
+		ComponentListener l = new ComponentAdapter() {
+			boolean lastFullScreen;
+
+			@Override
+			public void componentResized( ComponentEvent e ) {
+				Window window = SwingUtilities.windowForComponent( rootPane );
+				if( window == null )
+					return;
+
+				boolean fullScreen = FlatNativeMacLibrary.isLoaded() && FlatNativeMacLibrary.isWindowFullScreen( window );
+				if( fullScreen == lastFullScreen )
+					return;
+
+				lastFullScreen = fullScreen;
+				macUpdateFullWindowContentButtonsBoundsProperty( rootPane );
+			}
+		};
+
+		rootPane.addComponentListener( l );
+		return l;
+	}
+
+	static void macUninstallListeners( JRootPane rootPane, ComponentListener l ) {
+		if( l != null )
+			rootPane.removeComponentListener( l );
+	}
+
+	static void macUpdateFullWindowContentButtonsBoundsProperty( JRootPane rootPane ) {
+		if( !SystemInfo.isMacFullWindowContentSupported || !rootPane.isDisplayable() )
+			return;
+
+		Rectangle bounds = null;
+		if( FlatClientProperties.clientPropertyBoolean( rootPane, "apple.awt.fullWindowContent", false ) ) {
+			bounds = FlatNativeMacLibrary.isLoaded()
+				? FlatNativeMacLibrary.getWindowButtonsBounds( SwingUtilities.windowForComponent( rootPane ) )
+				: new Rectangle( 68, 28 ); // default size
+		}
+		rootPane.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_BOUNDS, bounds );
+	}
+
+	static void macUninstallFullWindowContentButtonsBoundsProperty( JRootPane rootPane ) {
+		if( !SystemInfo.isMacFullWindowContentSupported )
+			return;
+
+		rootPane.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_BOUNDS, null );
+	}
+
+	static void debugPaint( Graphics g, JComponent c ) {
+		if( !UIManager.getBoolean( KEY_DEBUG_SHOW_PLACEHOLDERS ) )
+			return;
+
+		int width = c.getWidth();
+		int height = c.getHeight();
+		if( width <= 0 || height <= 0 )
+			return;
+
+		// draw red figure
+		g.setColor( Color.red );
+		debugPaintRect( g, new Rectangle( width, height ) );
+
+		// draw magenta figure if buttons bounds are not equal to placeholder bounds
+		JRootPane rootPane;
+		Rectangle bounds;
+		if( (rootPane = SwingUtilities.getRootPane( c )) != null &&
+			(bounds = (Rectangle) rootPane.getClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_BOUNDS )) != null &&
+			(bounds.width != width || bounds.height != height) )
+		{
+			g.setColor( Color.magenta );
+			debugPaintRect( g, SwingUtilities.convertRectangle( rootPane, bounds, c ) );
+		}
+	}
+
+	private static void debugPaintRect( Graphics g, Rectangle r ) {
+		// draw rectangle
+		g.drawRect( r.x, r.y, r.width - 1, r.height - 1 );
+
+		// draw diagonal cross
+		int x2 = r.x + r.width - 1;
+		int y2 = r.y + r.height - 1;
+		Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
+		g.drawLine( r.x, r.y, x2, y2 );
+		g.drawLine( r.x, y2, x2, r.y );
+		FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
+	}
+}

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/JavaCompatibility2.java

@@ -16,6 +16,7 @@
 
 package com.formdev.flatlaf.ui;
 
+import java.io.File;
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
@@ -25,6 +26,7 @@ import javax.swing.JList;
 import javax.swing.JPanel;
 import javax.swing.JTable;
 import javax.swing.JTree;
+import javax.swing.filechooser.FileSystemView;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.text.JTextComponent;
 import com.formdev.flatlaf.util.LoggingFacade;
@@ -88,4 +90,64 @@ public class JavaCompatibility2
 			return null;
 		}
 	}
+
+	/**
+	 * Java 8 - 11 on Windows: sun.awt.shell.ShellFolder.get( "fileChooserShortcutPanelFolders" )
+	 * <br>
+	 * Java 12: javax.swing.filechooser.FileSystemView.getChooserShortcutPanelFiles()
+	 *
+	 * @since 3.4
+	 */
+	public static 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];
+	}
+
+	/**
+	 * Java 8: sun.awt.shell.ShellFolder.get( "fileChooserComboBoxFolders" )
+	 * <br>
+	 * Java 9: javax.swing.filechooser.FileSystemView.getChooserComboBoxFiles()
+	 *
+	 * @since 3.4
+	 */
+	public static File[] getChooserComboBoxFiles( FileSystemView fsv ) {
+		try {
+			if( SystemInfo.isJava_9_orLater ) {
+				Method m = fsv.getClass().getMethod( "getChooserComboBoxFiles" );
+				return (File[]) m.invoke( fsv );
+			} else {
+				Class<?> cls = Class.forName( "sun.awt.shell.ShellFolder" );
+				Method m = cls.getMethod( "get", String.class );
+				return (File[]) m.invoke( null, "fileChooserComboBoxFolders" );
+			}
+		} 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];
+	}
 }

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

@@ -192,7 +192,8 @@ public class HiDPIUtils
 
 				case "Inter":
 				case "Inter Light":
-				case "Inter Semi Bold":
+				case "Inter Semi Bold":	// Inter v3
+				case "Inter SemiBold":	// Inter v4
 				case "Roboto":
 				case "Roboto Light":
 				case "Roboto Medium":

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

@@ -739,6 +739,8 @@ Table.rowHeight = 20
 Table.showHorizontalLines = false
 Table.showVerticalLines = false
 Table.showTrailingVerticalLine = false
+Table.paintOutsideAlternateRows = false
+Table.editorSelectAllOnStartEditing = true
 Table.consistentHomeEndKeyBehavior = true
 Table.intercellSpacing = 0,0
 Table.scrollPaneBorder = com.formdev.flatlaf.ui.FlatScrollPaneBorder
@@ -829,7 +831,6 @@ TitlePane.centerTitleIfMenuBarEmbedded = true
 TitlePane.showIconBesideTitle = false
 TitlePane.menuBarTitleGap = 40
 TitlePane.menuBarTitleMinimumGap = 12
-TitlePane.menuBarResizeHeight = 4
 TitlePane.closeIcon = com.formdev.flatlaf.icons.FlatWindowCloseIcon
 TitlePane.iconifyIcon = com.formdev.flatlaf.icons.FlatWindowIconifyIcon
 TitlePane.maximizeIcon = com.formdev.flatlaf.icons.FlatWindowMaximizeIcon

flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/DemoFrame.java

@@ -73,6 +73,7 @@ class DemoFrame
 		initComponents();
 		updateFontMenuItems();
 		initAccentColors();
+		initFullWindowContent();
 		controlBar.initialize( this, tabbedPane );
 
 		setIconImages( FlatSVGUtils.createWindowIconImages( "/com/formdev/flatlaf/demo/FlatLaf.svg" ) );
@@ -89,24 +90,23 @@ class DemoFrame
 			// do not use HTML text in menu items because this is not supported in macOS screen menu
 			htmlMenuItem.setText( "some text" );
 
+			JRootPane rootPane = getRootPane();
 			if( SystemInfo.isMacFullWindowContentSupported ) {
 				// expand window content into window title bar and make title bar transparent
-				getRootPane().putClientProperty( "apple.awt.fullWindowContent", true );
+				rootPane.putClientProperty( "apple.awt.fullWindowContent", true );
-				getRootPane().putClientProperty( "apple.awt.transparentTitleBar", true );
+				rootPane.putClientProperty( "apple.awt.transparentTitleBar", true );
+				rootPane.putClientProperty( FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING, FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING_LARGE );
 
 				// hide window title
 				if( SystemInfo.isJava_17_orLater )
-					getRootPane().putClientProperty( "apple.awt.windowTitleVisible", false );
+					rootPane.putClientProperty( "apple.awt.windowTitleVisible", false );
 				else
 					setTitle( null );
-
-				// add gap to left side of toolbar
-				toolBar.add( Box.createHorizontalStrut( 70 ), 0 );
 			}
 
 			// enable full screen mode for this window (for Java 8 - 10; not necessary for Java 11+)
 			if( !SystemInfo.isJava_11_orLater )
-				getRootPane().putClientProperty( "apple.awt.fullscreenable", true );
+				rootPane.putClientProperty( "apple.awt.fullscreenable", true );
 		}
 
 		// integrate into macOS screen menu
@@ -461,9 +461,37 @@ class DemoFrame
 			accentColorButtons[i].setVisible( isAccentColorSupported );
 	}
 
+	private void initFullWindowContent() {
+		if( !supportsFlatLafWindowDecorations() )
+			return;
+
+		// create fullWindowContent mode toggle button
+		Icon expandIcon = new FlatSVGIcon( "com/formdev/flatlaf/demo/icons/expand.svg" );
+		Icon collapseIcon = new FlatSVGIcon( "com/formdev/flatlaf/demo/icons/collapse.svg" );
+		JToggleButton fullWindowContentButton = new JToggleButton( expandIcon );
+		fullWindowContentButton.setToolTipText( "Toggle full window content" );
+		fullWindowContentButton.addActionListener( e -> {
+			boolean fullWindowContent = fullWindowContentButton.isSelected();
+			fullWindowContentButton.setIcon( fullWindowContent ? collapseIcon : expandIcon );
+			menuBar.setVisible( !fullWindowContent );
+			toolBar.setVisible( !fullWindowContent );
+			getRootPane().putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT, fullWindowContent );
+		} );
+
+		// add fullWindowContent mode toggle button to tabbed pane
+		JToolBar trailingToolBar = new JToolBar();
+		trailingToolBar.add( Box.createGlue() );
+		trailingToolBar.add( fullWindowContentButton );
+		tabbedPane.putClientProperty( FlatClientProperties.TABBED_PANE_TRAILING_COMPONENT, trailingToolBar );
+	}
+
+	private boolean supportsFlatLafWindowDecorations() {
+		return FlatLaf.supportsNativeWindowDecorations() || (SystemInfo.isLinux && JFrame.isDefaultLookAndFeelDecorated());
+	}
+
 	private void initComponents() {
 		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
-		JMenuBar menuBar1 = new JMenuBar();
+		menuBar = new JMenuBar();
 		JMenu fileMenu = new JMenu();
 		JMenuItem newMenuItem = new JMenuItem();
 		JMenuItem openMenuItem = new JMenuItem();
@@ -509,6 +537,8 @@ class DemoFrame
 		JMenuItem showUIDefaultsInspectorMenuItem = new JMenuItem();
 		JMenu helpMenu = new JMenu();
 		aboutMenuItem = new JMenuItem();
+		JPanel toolBarPanel = new JPanel();
+		JPanel macFullWindowContentButtonsPlaceholder = new JPanel();
 		toolBar = new JToolBar();
 		JButton backButton = new JButton();
 		JButton forwardButton = new JButton();
@@ -524,8 +554,10 @@ class DemoFrame
 		DataComponentsPanel dataComponentsPanel = new DataComponentsPanel();
 		TabsPanel tabsPanel = new TabsPanel();
 		OptionPanePanel optionPanePanel = new OptionPanePanel();
-		ExtrasPanel extrasPanel1 = new ExtrasPanel();
+		ExtrasPanel extrasPanel = new ExtrasPanel();
 		controlBar = new ControlBar();
+		JPanel themesPanelPanel = new JPanel();
+		JPanel winFullWindowContentButtonsPlaceholder = new JPanel();
 		themesPanel = new IJThemesPanel();
 
 		//======== this ========
@@ -534,7 +566,7 @@ class DemoFrame
 		Container contentPane = getContentPane();
 		contentPane.setLayout(new BorderLayout());
 
-		//======== menuBar1 ========
+		//======== menuBar ========
 		{
 
 			//======== fileMenu ========
@@ -579,7 +611,7 @@ class DemoFrame
 				exitMenuItem.addActionListener(e -> exitActionPerformed());
 				fileMenu.add(exitMenuItem);
 			}
-			menuBar1.add(fileMenu);
+			menuBar.add(fileMenu);
 
 			//======== editMenu ========
 			{
@@ -632,7 +664,7 @@ class DemoFrame
 				deleteMenuItem.addActionListener(e -> menuItemActionPerformed(e));
 				editMenu.add(deleteMenuItem);
 			}
-			menuBar1.add(editMenu);
+			menuBar.add(editMenu);
 
 			//======== viewMenu ========
 			{
@@ -732,7 +764,7 @@ class DemoFrame
 				radioButtonMenuItem3.addActionListener(e -> menuItemActionPerformed(e));
 				viewMenu.add(radioButtonMenuItem3);
 			}
-			menuBar1.add(viewMenu);
+			menuBar.add(viewMenu);
 
 			//======== fontMenu ========
 			{
@@ -756,7 +788,7 @@ class DemoFrame
 				decrFontMenuItem.addActionListener(e -> decrFont());
 				fontMenu.add(decrFontMenuItem);
 			}
-			menuBar1.add(fontMenu);
+			menuBar.add(fontMenu);
 
 			//======== optionsMenu ========
 			{
@@ -808,7 +840,7 @@ class DemoFrame
 				showUIDefaultsInspectorMenuItem.addActionListener(e -> showUIDefaultsInspector());
 				optionsMenu.add(showUIDefaultsInspectorMenuItem);
 			}
-			menuBar1.add(optionsMenu);
+			menuBar.add(optionsMenu);
 
 			//======== helpMenu ========
 			{
@@ -821,54 +853,66 @@ class DemoFrame
 				aboutMenuItem.addActionListener(e -> aboutActionPerformed());
 				helpMenu.add(aboutMenuItem);
 			}
-			menuBar1.add(helpMenu);
+			menuBar.add(helpMenu);
 		}
-		setJMenuBar(menuBar1);
+		setJMenuBar(menuBar);
 
-		//======== toolBar ========
+		//======== toolBarPanel ========
 		{
-			toolBar.setMargin(new Insets(3, 3, 3, 3));
+			toolBarPanel.setLayout(new BorderLayout());
 
-			//---- backButton ----
+			//======== macFullWindowContentButtonsPlaceholder ========
-			backButton.setToolTipText("Back");
+			{
-			backButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/back.svg"));
+				macFullWindowContentButtonsPlaceholder.setLayout(new FlowLayout());
-			toolBar.add(backButton);
+			}
+			toolBarPanel.add(macFullWindowContentButtonsPlaceholder, BorderLayout.WEST);
 
-			//---- forwardButton ----
+			//======== toolBar ========
-			forwardButton.setToolTipText("Forward");
+			{
-			forwardButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/forward.svg"));
+				toolBar.setMargin(new Insets(3, 3, 3, 3));
-			toolBar.add(forwardButton);
-			toolBar.addSeparator();
 
-			//---- cutButton ----
+				//---- backButton ----
-			cutButton.setToolTipText("Cut");
+				backButton.setToolTipText("Back");
-			cutButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/menu-cut.svg"));
+				backButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/back.svg"));
-			toolBar.add(cutButton);
+				toolBar.add(backButton);
 
-			//---- copyButton ----
+				//---- forwardButton ----
-			copyButton.setToolTipText("Copy");
+				forwardButton.setToolTipText("Forward");
-			copyButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/copy.svg"));
+				forwardButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/forward.svg"));
-			toolBar.add(copyButton);
+				toolBar.add(forwardButton);
+				toolBar.addSeparator();
 
-			//---- pasteButton ----
+				//---- cutButton ----
-			pasteButton.setToolTipText("Paste");
+				cutButton.setToolTipText("Cut");
-			pasteButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/menu-paste.svg"));
+				cutButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/menu-cut.svg"));
-			toolBar.add(pasteButton);
+				toolBar.add(cutButton);
-			toolBar.addSeparator();
 
-			//---- refreshButton ----
+				//---- copyButton ----
-			refreshButton.setToolTipText("Refresh");
+				copyButton.setToolTipText("Copy");
-			refreshButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/refresh.svg"));
+				copyButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/copy.svg"));
-			toolBar.add(refreshButton);
+				toolBar.add(copyButton);
-			toolBar.addSeparator();
 
-			//---- showToggleButton ----
+				//---- pasteButton ----
-			showToggleButton.setSelected(true);
+				pasteButton.setToolTipText("Paste");
-			showToggleButton.setToolTipText("Show Details");
+				pasteButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/menu-paste.svg"));
-			showToggleButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/show.svg"));
+				toolBar.add(pasteButton);
-			toolBar.add(showToggleButton);
+				toolBar.addSeparator();
+
+				//---- refreshButton ----
+				refreshButton.setToolTipText("Refresh");
+				refreshButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/refresh.svg"));
+				toolBar.add(refreshButton);
+				toolBar.addSeparator();
+
+				//---- showToggleButton ----
+				showToggleButton.setSelected(true);
+				showToggleButton.setToolTipText("Show Details");
+				showToggleButton.setIcon(new FlatSVGIcon("com/formdev/flatlaf/demo/icons/show.svg"));
+				toolBar.add(showToggleButton);
+			}
+			toolBarPanel.add(toolBar, BorderLayout.CENTER);
 		}
-		contentPane.add(toolBar, BorderLayout.NORTH);
+		contentPane.add(toolBarPanel, BorderLayout.PAGE_START);
 
 		//======== contentPanel ========
 		{
@@ -888,13 +932,25 @@ class DemoFrame
 				tabbedPane.addTab("Data Components", dataComponentsPanel);
 				tabbedPane.addTab("Tabs", tabsPanel);
 				tabbedPane.addTab("Option Pane", optionPanePanel);
-				tabbedPane.addTab("Extras", extrasPanel1);
+				tabbedPane.addTab("Extras", extrasPanel);
 			}
 			contentPanel.add(tabbedPane, "cell 0 0");
 		}
 		contentPane.add(contentPanel, BorderLayout.CENTER);
-		contentPane.add(controlBar, BorderLayout.SOUTH);
+		contentPane.add(controlBar, BorderLayout.PAGE_END);
-		contentPane.add(themesPanel, BorderLayout.EAST);
+
+		//======== themesPanelPanel ========
+		{
+			themesPanelPanel.setLayout(new BorderLayout());
+
+			//======== winFullWindowContentButtonsPlaceholder ========
+			{
+				winFullWindowContentButtonsPlaceholder.setLayout(new FlowLayout());
+			}
+			themesPanelPanel.add(winFullWindowContentButtonsPlaceholder, BorderLayout.NORTH);
+			themesPanelPanel.add(themesPanel, BorderLayout.CENTER);
+		}
+		contentPane.add(themesPanelPanel, BorderLayout.LINE_END);
 
 		//---- buttonGroup1 ----
 		ButtonGroup buttonGroup1 = new ButtonGroup();
@@ -909,8 +965,8 @@ class DemoFrame
 		usersButton.setButtonType( ButtonType.toolBarButton );
 		usersButton.setFocusable( false );
 		usersButton.addActionListener( e -> JOptionPane.showMessageDialog( null, "Hello User! How are you?", "User", JOptionPane.INFORMATION_MESSAGE ) );
-		menuBar1.add( Box.createGlue() );
+		menuBar.add( Box.createGlue() );
-		menuBar1.add( usersButton );
+		menuBar.add( usersButton );
 
 		cutMenuItem.addActionListener( new DefaultEditorKit.CutAction() );
 		copyMenuItem.addActionListener( new DefaultEditorKit.CopyAction() );
@@ -922,7 +978,7 @@ class DemoFrame
 		for( int i = 1; i <= 100; i++ )
 			scrollingPopupMenu.add( "Item " + i );
 
-		if( FlatLaf.supportsNativeWindowDecorations() || (SystemInfo.isLinux && JFrame.isDefaultLookAndFeelDecorated()) ) {
+		if( supportsFlatLafWindowDecorations() ) {
 			if( SystemInfo.isLinux )
 				unsupported( windowDecorationsCheckBoxMenuItem );
 			else
@@ -943,6 +999,17 @@ class DemoFrame
 		if( "false".equals( System.getProperty( "flatlaf.animatedLafChange" ) ) )
 			animatedLafChangeMenuItem.setSelected( false );
 
+
+		// on macOS, panel left to toolBar is a placeholder for title bar buttons in fullWindowContent mode
+		macFullWindowContentButtonsPlaceholder.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER, "mac zeroInFullScreen" );
+
+		// on Windows/Linux, panel above themesPanel is a placeholder for title bar buttons in fullWindowContent mode
+		winFullWindowContentButtonsPlaceholder.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER, "win" );
+
+		// uncomment this line to see title bar buttons placeholders in fullWindowContent mode
+//		UIManager.put( "FlatLaf.debug.panel.showPlaceholders", true );
+
+
 		// remove contentPanel bottom insets
 		MigLayout layout = (MigLayout) contentPanel.getLayout();
 		LC lc = ConstraintParser.parseLayoutConstraint( (String) layout.getLayoutConstraints() );
@@ -963,6 +1030,7 @@ class DemoFrame
 	}
 
 	// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
+	private JMenuBar menuBar;
 	private JMenuItem exitMenuItem;
 	private JMenu scrollingPopupMenu;
 	private JMenuItem htmlMenuItem;

flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/DemoFrame.jfd

@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "8.1.0.0.283" Java: "19.0.2" encoding: "UTF-8"
+JFDML JFormDesigner: "8.2.1.0.348" Java: "21.0.1" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
@@ -12,59 +12,69 @@ new FormModel {
 			"defaultCloseOperation": 2
 			"$locationPolicy": 2
 			"$sizePolicy": 2
-			add( new FormContainer( "javax.swing.JToolBar", new FormLayoutManager( class javax.swing.JToolBar ) ) {
+			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-				name: "toolBar"
+				name: "toolBarPanel"
-				"margin": new java.awt.Insets( 3, 3, 3, 3 )
+				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.FlowLayout ) ) {
-				auxiliary() {
+					name: "macFullWindowContentButtonsPlaceholder"
-					"JavaCodeGenerator.variableLocal": false
+				}, new FormLayoutConstraints( class java.lang.String ) {
-				}
+					"value": "West"
-				add( new FormComponent( "javax.swing.JButton" ) {
-					name: "backButton"
-					"toolTipText": "Back"
-					"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/back.svg" )
 				} )
-				add( new FormComponent( "javax.swing.JButton" ) {
+				add( new FormContainer( "javax.swing.JToolBar", new FormLayoutManager( class javax.swing.JToolBar ) ) {
-					name: "forwardButton"
+					name: "toolBar"
-					"toolTipText": "Forward"
+					"margin": new java.awt.Insets( 3, 3, 3, 3 )
-					"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/forward.svg" )
+					auxiliary() {
-				} )
+						"JavaCodeGenerator.variableLocal": false
-				add( new FormComponent( "javax.swing.JToolBar$Separator" ) {
+					}
-					name: "separator5"
+					add( new FormComponent( "javax.swing.JButton" ) {
-				} )
+						name: "backButton"
-				add( new FormComponent( "javax.swing.JButton" ) {
+						"toolTipText": "Back"
-					name: "cutButton"
+						"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/back.svg" )
-					"toolTipText": "Cut"
+					} )
-					"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/menu-cut.svg" )
+					add( new FormComponent( "javax.swing.JButton" ) {
-				} )
+						name: "forwardButton"
-				add( new FormComponent( "javax.swing.JButton" ) {
+						"toolTipText": "Forward"
-					name: "copyButton"
+						"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/forward.svg" )
-					"toolTipText": "Copy"
+					} )
-					"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/copy.svg" )
+					add( new FormComponent( "javax.swing.JToolBar$Separator" ) {
-				} )
+						name: "separator5"
-				add( new FormComponent( "javax.swing.JButton" ) {
+					} )
-					name: "pasteButton"
+					add( new FormComponent( "javax.swing.JButton" ) {
-					"toolTipText": "Paste"
+						name: "cutButton"
-					"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/menu-paste.svg" )
+						"toolTipText": "Cut"
-				} )
+						"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/menu-cut.svg" )
-				add( new FormComponent( "javax.swing.JToolBar$Separator" ) {
+					} )
-					name: "separator6"
+					add( new FormComponent( "javax.swing.JButton" ) {
-				} )
+						name: "copyButton"
-				add( new FormComponent( "javax.swing.JButton" ) {
+						"toolTipText": "Copy"
-					name: "refreshButton"
+						"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/copy.svg" )
-					"toolTipText": "Refresh"
+					} )
-					"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/refresh.svg" )
+					add( new FormComponent( "javax.swing.JButton" ) {
-				} )
+						name: "pasteButton"
-				add( new FormComponent( "javax.swing.JToolBar$Separator" ) {
+						"toolTipText": "Paste"
-					name: "separator7"
+						"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/menu-paste.svg" )
-				} )
+					} )
-				add( new FormComponent( "javax.swing.JToggleButton" ) {
+					add( new FormComponent( "javax.swing.JToolBar$Separator" ) {
-					name: "showToggleButton"
+						name: "separator6"
-					"selected": true
+					} )
-					"toolTipText": "Show Details"
+					add( new FormComponent( "javax.swing.JButton" ) {
-					"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/show.svg" )
+						name: "refreshButton"
+						"toolTipText": "Refresh"
+						"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/refresh.svg" )
+					} )
+					add( new FormComponent( "javax.swing.JToolBar$Separator" ) {
+						name: "separator7"
+					} )
+					add( new FormComponent( "javax.swing.JToggleButton" ) {
+						name: "showToggleButton"
+						"selected": true
+						"toolTipText": "Show Details"
+						"icon": new com.jformdesigner.model.SwingIcon( 0, "/com/formdev/flatlaf/demo/icons/show.svg" )
+					} )
+				}, new FormLayoutConstraints( class java.lang.String ) {
+					"value": "Center"
 				} )
 			}, new FormLayoutConstraints( class java.lang.String ) {
-				"value": "North"
+				"value": "First"
 			} )
 			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
 				"$layoutConstraints": "insets dialog,hidemode 3"
@@ -105,7 +115,7 @@ new FormModel {
 						"title": "Option Pane"
 					} )
 					add( new FormComponent( "com.formdev.flatlaf.demo.extras.ExtrasPanel" ) {
-						name: "extrasPanel1"
+						name: "extrasPanel"
 					}, new FormLayoutConstraints( null ) {
 						"title": "Extras"
 					} )
@@ -121,19 +131,32 @@ new FormModel {
 					"JavaCodeGenerator.variableLocal": false
 				}
 			}, new FormLayoutConstraints( class java.lang.String ) {
-				"value": "South"
+				"value": "Last"
 			} )
-			add( new FormComponent( "com.formdev.flatlaf.demo.intellijthemes.IJThemesPanel" ) {
+			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-				name: "themesPanel"
+				name: "themesPanelPanel"
-				auxiliary() {
+				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.FlowLayout ) ) {
-					"JavaCodeGenerator.variableLocal": false
+					name: "winFullWindowContentButtonsPlaceholder"
-					"JavaCodeGenerator.variableModifiers": 0
+				}, new FormLayoutConstraints( class java.lang.String ) {
-				}
+					"value": "North"
+				} )
+				add( new FormComponent( "com.formdev.flatlaf.demo.intellijthemes.IJThemesPanel" ) {
+					name: "themesPanel"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+						"JavaCodeGenerator.variableModifiers": 0
+					}
+				}, new FormLayoutConstraints( class java.lang.String ) {
+					"value": "Center"
+				} )
 			}, new FormLayoutConstraints( class java.lang.String ) {
-				"value": "East"
+				"value": "After"
 			} )
 			menuBar: new FormContainer( "javax.swing.JMenuBar", new FormLayoutManager( class javax.swing.JMenuBar ) ) {
-				name: "menuBar1"
+				name: "menuBar"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
 				add( new FormContainer( "javax.swing.JMenu", new FormLayoutManager( class javax.swing.JMenu ) ) {
 					name: "fileMenu"
 					"text": "File"

flatlaf-demo/src/main/resources/com/formdev/flatlaf/demo/icons/collapse.svg

@@ -0,0 +1,4 @@
+<!-- Copyright 2000-2023 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license. -->
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M1.5 14.5L6 10M14.5 1.5L9.99998 6.00001M2.5 9.50001H6.5L6.5 13.5M13.5 6.5L9.5 6.50003V2.5" stroke="#6E6E6E" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

flatlaf-demo/src/main/resources/com/formdev/flatlaf/demo/icons/expand.svg

@@ -0,0 +1,4 @@
+<!-- Copyright 2000-2023 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license. -->
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M6.5 9.5L2 14M9.50003 6.50004L14 2.00001M5.5 14.5H1.5V10.5M10.5 1.5L14.5 1.50002V5.5" stroke="#6E6E6E" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

flatlaf-fonts/flatlaf-fonts-inter/build.gradle.kts

@@ -18,7 +18,7 @@
 //     For maven compatibility, <font-version> should be in format <major>.<minor>[.<micro>].
 //     <build-number> is optional and should be incremented only if a new release is
 //     necessary, but the <font-version> has not changed.
-version = "3.19"
+version = "4.0"
 
 if( !rootProject.hasProperty( "release" ) )
 	version = version.toString() + "-SNAPSHOT"
@@ -56,7 +56,7 @@ tasks {
 		testLogging.exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
 	}
 
-	withType<PublishToMavenRepository>().configureEach {
+	withType<AbstractPublishToMaven>().configureEach {
 		onlyIf { !rootProject.hasProperty( "skipFonts" ) }
 	}
 }

flatlaf-fonts/flatlaf-fonts-inter/src/main/java/com/formdev/flatlaf/fonts/inter/FlatInterFont.java

@@ -117,7 +117,7 @@ public class FlatInterFont
 	 * new Font( FlatInterFont.FAMILY_SEMIBOLD, Font.ITALIC, 12 );
 	 * }</pre>
 	 */
-	public static final String FAMILY_SEMIBOLD = "Inter Semi Bold";
+	public static final String FAMILY_SEMIBOLD = "Inter SemiBold";
 
 	/**
 	 * Use for {@link #installStyle(String)} to install single font style.

flatlaf-fonts/flatlaf-fonts-inter/src/main/resources/com/formdev/flatlaf/fonts/inter/LICENSE.txt

@@ -1,6 +1,4 @@
-Copyright (c) 2016-2020 The Inter Project Authors.
+Copyright (c) 2016 The Inter Project Authors (https://github.com/rsms/inter)
-"Inter" is trademark of Rasmus Andersson.
-https://github.com/rsms/inter
 
 This Font Software is licensed under the SIL Open Font License, Version 1.1.
 This license is copied below, and is also available with a FAQ at:

flatlaf-fonts/flatlaf-fonts-jetbrains-mono/build.gradle.kts

@@ -56,7 +56,7 @@ tasks {
 		testLogging.exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
 	}
 
-	withType<PublishToMavenRepository>().configureEach {
+	withType<AbstractPublishToMaven>().configureEach {
 		onlyIf { !rootProject.hasProperty( "skipFonts" ) }
 	}
 }

flatlaf-fonts/flatlaf-fonts-roboto-mono/build.gradle.kts

@@ -56,7 +56,7 @@ tasks {
 		testLogging.exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
 	}
 
-	withType<PublishToMavenRepository>().configureEach {
+	withType<AbstractPublishToMaven>().configureEach {
 		onlyIf { !rootProject.hasProperty( "skipFonts" ) }
 	}
 }

flatlaf-fonts/flatlaf-fonts-roboto/build.gradle.kts

@@ -56,7 +56,7 @@ tasks {
 		testLogging.exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
 	}
 
-	withType<PublishToMavenRepository>().configureEach {
+	withType<AbstractPublishToMaven>().configureEach {
 		onlyIf { !rootProject.hasProperty( "skipFonts" ) }
 	}
 }

flatlaf-jide-oss/src/main/java/com/formdev/flatlaf/jideoss/ui/FlatJideTabbedPaneUI.java

@@ -16,6 +16,7 @@
 
 package com.formdev.flatlaf.jideoss.ui;
 
+import static com.formdev.flatlaf.FlatClientProperties.COMPONENT_TITLE_BAR_CAPTION;
 import static com.formdev.flatlaf.FlatClientProperties.TABBED_PANE_HAS_FULL_BORDER;
 import static com.formdev.flatlaf.FlatClientProperties.TABBED_PANE_SHOW_TAB_SEPARATORS;
 import static com.formdev.flatlaf.FlatClientProperties.clientPropertyBoolean;
@@ -30,6 +31,7 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Insets;
 import java.awt.LayoutManager;
+import java.awt.Point;
 import java.awt.Rectangle;
 import java.awt.Shape;
 import java.awt.event.MouseListener;
@@ -37,6 +39,7 @@ import java.awt.event.MouseMotionListener;
 import java.awt.geom.Path2D;
 import java.awt.geom.Rectangle2D;
 import java.beans.PropertyChangeListener;
+import java.util.function.Function;
 import javax.swing.Icon;
 import javax.swing.JButton;
 import javax.swing.JComponent;
@@ -100,6 +103,25 @@ public class FlatJideTabbedPaneUI
 		return new FlatJideTabbedPaneUI();
 	}
 
+	@Override
+	public void installUI( JComponent c ) {
+		super.installUI( c );
+
+		c.putClientProperty( COMPONENT_TITLE_BAR_CAPTION,
+			(Function<Point, Boolean>) pt -> {
+				if( tabForCoordinate( _tabPane, pt.x, pt.y ) >= 0 )
+					return false;
+
+				return null; // check children
+			} );
+	}
+
+	@Override
+	public void uninstallUI( JComponent c ) {
+		super.uninstallUI( c );
+		c.putClientProperty( COMPONENT_TITLE_BAR_CAPTION, null );
+	}
+
 	@Override
 	protected void installDefaults() {
 		super.installDefaults();

flatlaf-natives/flatlaf-natives-jna/src/main/java/com/formdev/flatlaf/natives/jna/windows/FlatWindowsNativeWindowBorder.java

@@ -32,8 +32,8 @@ import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.util.Collections;
 import java.util.IdentityHashMap;
-import java.util.List;
 import java.util.Map;
+import java.util.function.Predicate;
 import javax.swing.JDialog;
 import javax.swing.JFrame;
 import javax.swing.Timer;
@@ -164,7 +164,7 @@ public class FlatWindowsNativeWindowBorder
 	}
 
 	@Override
-	public void updateTitleBarInfo( Window window, int titleBarHeight, List<Rectangle> hitTestSpots,
+	public void updateTitleBarInfo( Window window, int titleBarHeight, Predicate<Point> captionHitTestCallback,
 		Rectangle appIconBounds, Rectangle minimizeButtonBounds, Rectangle maximizeButtonBounds,
 		Rectangle closeButtonBounds )
 	{
@@ -173,7 +173,7 @@ public class FlatWindowsNativeWindowBorder
 			return;
 
 		wndProc.titleBarHeight = titleBarHeight;
-		wndProc.hitTestSpots = hitTestSpots.toArray( new Rectangle[hitTestSpots.size()] );
+		wndProc.captionHitTestCallback = captionHitTestCallback;
 		wndProc.appIconBounds = cloneRectange( appIconBounds );
 		wndProc.minimizeButtonBounds = cloneRectange( minimizeButtonBounds );
 		wndProc.maximizeButtonBounds = cloneRectange( maximizeButtonBounds );
@@ -351,7 +351,7 @@ public class FlatWindowsNativeWindowBorder
 
 		// Swing coordinates/values may be scaled on a HiDPI screen
 		private int titleBarHeight;
-		private Rectangle[] hitTestSpots;
+		private Predicate<Point> captionHitTestCallback;
 		private Rectangle appIconBounds;
 		private Rectangle minimizeButtonBounds;
 		private Rectangle maximizeButtonBounds;
@@ -644,53 +644,65 @@ public class FlatWindowsNativeWindowBorder
 
 			// scale-down mouse x/y because Swing coordinates/values may be scaled on a HiDPI screen
 			Point pt = scaleDown( x, y );
-			int sx = pt.x;
-			int sy = pt.y;
 
 			// return HTSYSMENU if mouse is over application icon
 			//   - left-click on HTSYSMENU area shows system menu
 			//   - double-left-click sends WM_CLOSE
-			if( contains( appIconBounds, sx, sy ) )
+			if( contains( appIconBounds, pt ) )
 				return new LRESULT( HTSYSMENU );
 
 			// return HTMINBUTTON if mouse is over minimize button
 			//   - hovering mouse over HTMINBUTTON area shows tooltip on Windows 10/11
-			if( contains( minimizeButtonBounds, sx, sy ) )
+			if( contains( minimizeButtonBounds, pt ) )
 				return new LRESULT( HTMINBUTTON );
 
 			// return HTMAXBUTTON if mouse is over maximize/restore button
 			//   - hovering mouse over HTMAXBUTTON area shows tooltip on Windows 10
 			//   - hovering mouse over HTMAXBUTTON area shows snap layouts menu on Windows 11
 			//     https://docs.microsoft.com/en-us/windows/apps/desktop/modernize/apply-snap-layout-menu
-			if( contains( maximizeButtonBounds, sx, sy ) )
+			if( contains( maximizeButtonBounds, pt ) )
 				return new LRESULT( HTMAXBUTTON );
 
 			// return HTCLOSE if mouse is over close button
 			//   - hovering mouse over HTCLOSE area shows tooltip on Windows 10/11
-			if( contains( closeButtonBounds, sx, sy ) )
+			if( contains( closeButtonBounds, pt ) )
 				return new LRESULT( HTCLOSE );
 
 			int resizeBorderHeight = getResizeHandleHeight();
 			boolean isOnResizeBorder = (y < resizeBorderHeight) &&
 				(User32.INSTANCE.GetWindowLong( hwnd, GWL_STYLE ) & WS_THICKFRAME) != 0;
-			boolean isOnTitleBar = (sy < titleBarHeight);
 
+			// return HTTOP if mouse is over top resize border
+			//   - hovering mouse shows vertical resize cursor
+			//   - left-click and drag vertically resizes window
+			if( isOnResizeBorder )
+				return new LRESULT( HTTOP );
+
+			boolean isOnTitleBar = (pt.y < titleBarHeight);
 			if( isOnTitleBar ) {
-				// use a second reference to the array to avoid that it can be changed
+				// return HTCLIENT if mouse is over any Swing component in title bar
-				// in another thread while processing the array
+				// that processes mouse events (e.g. buttons, menus, etc)
-				Rectangle[] hitTestSpots2 = hitTestSpots;
+				//   - Windows ignores mouse events in this area
-				for( Rectangle spot : hitTestSpots2 ) {
+				try {
-					if( spot.contains( sx, sy ) )
+					if( captionHitTestCallback != null && !captionHitTestCallback.test( pt ) )
 						return new LRESULT( HTCLIENT );
+				} catch( Throwable ex ) {
+					// ignore
 				}
-				return new LRESULT( isOnResizeBorder ? HTTOP : HTCAPTION );
+
+				// return HTCAPTION if mouse is over title bar
+				//   - right-click shows system menu
+				//   - double-left-click maximizes/restores window size
+				return new LRESULT( HTCAPTION );
 			}
 
-			return new LRESULT( isOnResizeBorder ? HTTOP : HTCLIENT );
+			// return HTCLIENT
+			//   - Windows ignores mouse events in this area
+			return new LRESULT( HTCLIENT );
 		}
 
-		private boolean contains( Rectangle rect, int x, int y ) {
+		private boolean contains( Rectangle rect, Point pt ) {
-			return (rect != null && rect.contains( x, y ) );
+			return (rect != null && rect.contains( pt ) );
 		}
 
 		/**

flatlaf-natives/flatlaf-natives-macos/src/main/headers/JNIUtils.h

@@ -41,4 +41,6 @@
 	}
 
 
-jfieldID getFieldID( JNIEnv *env, const char* className, const char* fieldName, const char* fieldSignature );
+jclass findClass( JNIEnv *env, const char* className, bool globalRef );
+jfieldID getFieldID( JNIEnv *env, const char* className, const char* fieldName, const char* fieldSignature, bool staticField );
+jmethodID getMethodID( JNIEnv *env, jclass cls, const char* methodName, const char* methodSignature, bool staticMethod );

flatlaf-natives/flatlaf-natives-macos/src/main/headers/com_formdev_flatlaf_ui_FlatNativeMacLibrary.h

@@ -7,6 +7,12 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_BUTTONS_SPACING_DEFAULT
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_BUTTONS_SPACING_DEFAULT 0L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_BUTTONS_SPACING_MEDIUM
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_BUTTONS_SPACING_MEDIUM 1L
+#undef com_formdev_flatlaf_ui_FlatNativeMacLibrary_BUTTONS_SPACING_LARGE
+#define com_formdev_flatlaf_ui_FlatNativeMacLibrary_BUTTONS_SPACING_LARGE 2L
 /*
  * Class:     com_formdev_flatlaf_ui_FlatNativeMacLibrary
  * Method:    setWindowRoundedBorder
@@ -15,6 +21,38 @@ extern "C" {
 JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_setWindowRoundedBorder
   (JNIEnv *, jclass, jobject, jfloat, jfloat, jint);
 
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeMacLibrary
+ * Method:    setWindowButtonsSpacing
+ * Signature: (Ljava/awt/Window;I)Z
+ */
+JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_setWindowButtonsSpacing
+  (JNIEnv *, jclass, jobject, jint);
+
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeMacLibrary
+ * Method:    getWindowButtonsBounds
+ * Signature: (Ljava/awt/Window;)Ljava/awt/Rectangle;
+ */
+JNIEXPORT jobject JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_getWindowButtonsBounds
+  (JNIEnv *, jclass, jobject);
+
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeMacLibrary
+ * Method:    isWindowFullScreen
+ * Signature: (Ljava/awt/Window;)Z
+ */
+JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_isWindowFullScreen
+  (JNIEnv *, jclass, jobject);
+
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeMacLibrary
+ * Method:    toggleWindowFullScreen
+ * Signature: (Ljava/awt/Window;)Z
+ */
+JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_toggleWindowFullScreen
+  (JNIEnv *, jclass, jobject);
+
 #ifdef __cplusplus
 }
 #endif

flatlaf-natives/flatlaf-natives-macos/src/main/objcpp/JNIUtils.mm

@@ -21,8 +21,8 @@
  * @author Karl Tauber
  */
 
-jfieldID getFieldID( JNIEnv *env, const char* className, const char* fieldName, const char* fieldSignature ) {
+jclass findClass( JNIEnv *env, const char* className, bool globalRef ) {
-//	NSLog( @"getFieldID %s %s %s", className, fieldName, fieldSignature );
+//	NSLog( @"findClass %s", className );
 
 	jclass cls = env->FindClass( className );
 	if( cls == NULL ) {
@@ -32,7 +32,22 @@ jfieldID getFieldID( JNIEnv *env, const char* className, const char* fieldName,
 		return NULL;
 	}
 
-	jfieldID fieldID = env->GetFieldID( cls, fieldName, fieldSignature );
+	if( globalRef )
+		cls = reinterpret_cast<jclass>( env->NewGlobalRef( cls ) );
+
+	return cls;
+}
+
+jfieldID getFieldID( JNIEnv *env, const char* className, const char* fieldName, const char* fieldSignature, bool staticField ) {
+//	NSLog( @"getFieldID %s %s %s", className, fieldName, fieldSignature );
+
+	jclass cls = findClass( env, className, false );
+	if( cls == NULL )
+		return NULL;
+
+	jfieldID fieldID = staticField
+		? env->GetStaticFieldID( cls, fieldName, fieldSignature )
+		: env->GetFieldID( cls, fieldName, fieldSignature );
 	if( fieldID == NULL ) {
 		NSLog( @"FlatLaf: failed to lookup field '%s' of type '%s' in class '%s'", fieldName, fieldSignature, className );
 		env->ExceptionDescribe(); // print stack trace
@@ -42,3 +57,22 @@ jfieldID getFieldID( JNIEnv *env, const char* className, const char* fieldName,
 
 	return fieldID;
 }
+
+jmethodID getMethodID( JNIEnv *env, jclass cls, const char* methodName, const char* methodSignature, bool staticMethod ) {
+//	NSLog( @"getMethodID %s %s", methodName, methodSignature );
+
+	if( cls == NULL )
+		return NULL;
+
+	jmethodID methodID = staticMethod
+		? env->GetStaticMethodID( cls, methodName, methodSignature )
+		: env->GetMethodID( cls, methodName, methodSignature );
+	if( methodID == NULL ) {
+		NSLog( @"FlatLaf: failed to lookup method '%s' of type '%s'", methodName, methodSignature );
+		env->ExceptionDescribe(); // print stack trace
+		env->ExceptionClear();
+		return NULL;
+	}
+
+	return methodID;
+}

flatlaf-natives/flatlaf-natives-macos/src/main/objcpp/MacWindow.mm

@@ -15,6 +15,7 @@
  */
 
 #import <Cocoa/Cocoa.h>
+#import <objc/runtime.h>
 #import <jni.h>
 #import "JNIUtils.h"
 #import "JNFRunLoop.h"
@@ -24,14 +25,37 @@
  * @author Karl Tauber
  */
 
+@interface WindowData : NSObject
+	// used when window is full screen
+	@property (nonatomic) int lastWindowButtonAreaWidth;
+	@property (nonatomic) int lastWindowTitleBarHeight;
+
+	// full screen observers
+	@property (nonatomic) id willEnterFullScreenObserver;
+	@property (nonatomic) id willExitFullScreenObserver;
+	@property (nonatomic) id didExitFullScreenObserver;
+@end
+
+@implementation WindowData
+@end
+
+// declare internal methods
+NSWindow* getNSWindow( JNIEnv* env, jclass cls, jobject window );
+WindowData* getWindowData( NSWindow* nsWindow, bool allocate );
+void setWindowButtonsHidden( NSWindow* nsWindow, bool hidden );
+int getWindowButtonAreaWidth( NSWindow* nsWindow );
+int getWindowTitleBarHeight( NSWindow* nsWindow );
+bool isWindowFullScreen( NSWindow* nsWindow );
+
+
 NSWindow* getNSWindow( JNIEnv* env, jclass cls, jobject window ) {
 	if( window == NULL )
 		return NULL;
 
-	// initialize field IDs (done only once because fields are static)
+	// initialize field IDs (done only once because variables are static)
-	static jfieldID peerID = getFieldID( env, "java/awt/Component", "peer", "Ljava/awt/peer/ComponentPeer;" );
+	static jfieldID peerID = getFieldID( env, "java/awt/Component", "peer", "Ljava/awt/peer/ComponentPeer;", false );
-	static jfieldID platformWindowID = getFieldID( env, "sun/lwawt/LWWindowPeer", "platformWindow", "Lsun/lwawt/PlatformWindow;" );
+	static jfieldID platformWindowID = getFieldID( env, "sun/lwawt/LWWindowPeer", "platformWindow", "Lsun/lwawt/PlatformWindow;", false );
-	static jfieldID ptrID = getFieldID( env, "sun/lwawt/macosx/CFRetainedResource", "ptr", "J" );
+	static jfieldID ptrID = getFieldID( env, "sun/lwawt/macosx/CFRetainedResource", "ptr", "J", false );
 	if( peerID == NULL || platformWindowID == NULL || ptrID == NULL )
 		return NULL;
 
@@ -49,6 +73,16 @@ NSWindow* getNSWindow( JNIEnv* env, jclass cls, jobject window ) {
 	return (NSWindow *) jlong_to_ptr( env->GetLongField( platformWindow, ptrID ) );
 }
 
+WindowData* getWindowData( NSWindow* nsWindow, bool allocate ) {
+	static char key;
+	WindowData* windowData = objc_getAssociatedObject( nsWindow, &key );
+	if( windowData == NULL && allocate ) {
+		windowData = [WindowData new];
+		objc_setAssociatedObject( nsWindow, &key, windowData, OBJC_ASSOCIATION_RETAIN_NONATOMIC );
+	}
+	return windowData;
+}
+
 extern "C"
 JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_setWindowRoundedBorder
 	( JNIEnv* env, jclass cls, jobject window, jfloat radius, jfloat borderWidth, jint borderColor )
@@ -87,3 +121,259 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_setW
 	JNI_COCOA_EXIT()
 	return FALSE;
 }
+
+extern "C"
+JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_setWindowButtonsSpacing
+	( JNIEnv* env, jclass cls, jobject window, jint buttonsSpacing )
+{
+	JNI_COCOA_ENTER()
+
+	NSWindow* nsWindow = getNSWindow( env, cls, window );
+	if( nsWindow == NULL )
+		return FALSE;
+
+	#define SPACING_DEFAULT com_formdev_flatlaf_ui_FlatNativeMacLibrary_BUTTONS_SPACING_DEFAULT
+	#define SPACING_MEDIUM  com_formdev_flatlaf_ui_FlatNativeMacLibrary_BUTTONS_SPACING_MEDIUM
+	#define SPACING_LARGE   com_formdev_flatlaf_ui_FlatNativeMacLibrary_BUTTONS_SPACING_LARGE
+
+	bool isMacOS_11_orLater = @available( macOS 11, * );
+	if( !isMacOS_11_orLater && buttonsSpacing == SPACING_LARGE )
+		buttonsSpacing = SPACING_MEDIUM;
+	int oldButtonsSpacing = (nsWindow.toolbar != NULL)
+		? ((isMacOS_11_orLater && nsWindow.toolbarStyle == NSWindowToolbarStyleUnified)
+			? SPACING_LARGE
+			: SPACING_MEDIUM)
+		: SPACING_DEFAULT;
+
+	if( buttonsSpacing == oldButtonsSpacing )
+		return TRUE;
+
+	WindowData* windowData = getWindowData( nsWindow, true );
+
+	[FlatJNFRunLoop performOnMainThreadWaiting:YES withBlock:^(){
+//		NSLog( @"\n%@\n\n", [nsWindow.contentView.superview _subtreeDescription] );
+
+		// add/remove toolbar
+		NSToolbar* toolbar = NULL;
+		bool needsToolbar = (buttonsSpacing != SPACING_DEFAULT);
+		if( needsToolbar ) {
+			toolbar = [NSToolbar new];
+			toolbar.showsBaselineSeparator = NO; // necessary for older macOS versions
+			if( isWindowFullScreen( nsWindow ) )
+				toolbar.visible = NO;
+		}
+		nsWindow.toolbar = toolbar;
+
+		if( isMacOS_11_orLater ) {
+			nsWindow.toolbarStyle = (buttonsSpacing == SPACING_LARGE)
+				? NSWindowToolbarStyleUnified
+				: (buttonsSpacing == SPACING_MEDIUM)
+					? NSWindowToolbarStyleUnifiedCompact
+					: NSWindowToolbarStyleAutomatic;
+		}
+
+		windowData.lastWindowButtonAreaWidth = 0;
+		windowData.lastWindowTitleBarHeight = 0;
+
+//		NSLog( @"\n%@\n\n", [nsWindow.contentView.superview _subtreeDescription] );
+
+		// when window becomes full screen, it is necessary to hide the toolbar
+		// because it otherwise is shown non-transparent and hides Swing components
+		NSNotificationCenter* center = [NSNotificationCenter defaultCenter];
+		if( needsToolbar && windowData.willEnterFullScreenObserver == NULL ) {
+//			NSLog( @"add observers %@", nsWindow );
+			windowData.willEnterFullScreenObserver = [center addObserverForName:NSWindowWillEnterFullScreenNotification
+				object:nsWindow queue:nil usingBlock:^(NSNotification *note) {
+//					NSLog( @"enter full screen %@", nsWindow );
+					if( nsWindow.toolbar != NULL ) {
+						// remember button area width, which is used later when window exits full screen
+						// remembar title bar height so that "main" JToolBar keeps its height in full screen
+						windowData.lastWindowButtonAreaWidth = getWindowButtonAreaWidth( nsWindow );
+						windowData.lastWindowTitleBarHeight = getWindowTitleBarHeight( nsWindow );
+//						NSLog( @"%d %d", windowData.lastWindowButtonAreaWidth, windowData.lastWindowTitleBarHeight );
+
+						nsWindow.toolbar.visible = NO;
+					}
+				}];
+
+			windowData.willExitFullScreenObserver = [center addObserverForName:NSWindowWillExitFullScreenNotification
+				object:nsWindow queue:nil usingBlock:^(NSNotification *note) {
+//					NSLog( @"will exit  full screen %@", nsWindow );
+					if( nsWindow.toolbar != NULL )
+						setWindowButtonsHidden( nsWindow, true );
+				}];
+
+			windowData.didExitFullScreenObserver = [center addObserverForName:NSWindowDidExitFullScreenNotification
+				object:nsWindow queue:nil usingBlock:^(NSNotification *note) {
+//					NSLog( @"exit  full screen %@", nsWindow );
+					if( nsWindow.toolbar != NULL ) {
+						setWindowButtonsHidden( nsWindow, false );
+						nsWindow.toolbar.visible = YES;
+					}
+
+					windowData.lastWindowButtonAreaWidth = 0;
+					windowData.lastWindowTitleBarHeight = 0;
+				}];
+		} else if( !needsToolbar ) {
+//			NSLog( @"remove observers %@", nsWindow );
+			if( windowData.willEnterFullScreenObserver != NULL ) {
+				[center removeObserver:windowData.willEnterFullScreenObserver];
+				windowData.willEnterFullScreenObserver = nil;
+			}
+			if( windowData.willExitFullScreenObserver != NULL ) {
+				[center removeObserver:windowData.willExitFullScreenObserver];
+				windowData.willExitFullScreenObserver = nil;
+			}
+			if( windowData.didExitFullScreenObserver != NULL ) {
+				[center removeObserver:windowData.didExitFullScreenObserver];
+				windowData.didExitFullScreenObserver = nil;
+			}
+		}
+	}];
+
+	return TRUE;
+
+	JNI_COCOA_EXIT()
+	return FALSE;
+}
+
+void setWindowButtonsHidden( NSWindow* nsWindow, bool hidden ) {
+	// get buttons
+	NSView* buttons[3] = {
+		[nsWindow standardWindowButton:NSWindowCloseButton],
+		[nsWindow standardWindowButton:NSWindowMiniaturizeButton],
+		[nsWindow standardWindowButton:NSWindowZoomButton]
+	};
+
+	for( int i = 0; i < 3; i++ ) {
+		NSView* button = buttons[i];
+		if( button != NULL )
+			button.hidden = hidden;
+	}
+}
+
+extern "C"
+JNIEXPORT jobject JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_getWindowButtonsBounds
+	( JNIEnv* env, jclass cls, jobject window )
+{
+	JNI_COCOA_ENTER()
+
+	NSWindow* nsWindow = getNSWindow( env, cls, window );
+	if( nsWindow == NULL )
+		return NULL;
+
+	WindowData* windowData = getWindowData( nsWindow, false );
+	int width = 0;
+	int height = 0;
+
+	// get width
+	if( isWindowFullScreen( nsWindow ) ) {
+		// use zero if window is full screen because close/minimize/zoom buttons are hidden
+		width = 0;
+	} else if( windowData != NULL && windowData.lastWindowButtonAreaWidth > 0 ) {
+		// use remembered value if window is in transition from full screen to non-full screen
+		// because NSToolbar is not yet visible
+		width = windowData.lastWindowButtonAreaWidth;
+	} else
+		width = getWindowButtonAreaWidth( nsWindow );
+
+	// get height
+	if( windowData != NULL && windowData.lastWindowTitleBarHeight > 0 ) {
+		// use remembered value if window is full screen because NSToolbar is hidden
+		height = windowData.lastWindowTitleBarHeight;
+	} else
+		height = getWindowTitleBarHeight( nsWindow );
+
+	// initialize class and method ID (done only once because variables are static)
+	static jclass cls = findClass( env, "java/awt/Rectangle", true );
+	static jmethodID methodID = getMethodID( env, cls, "<init>", "(IIII)V", false );
+	if( cls == NULL || methodID == NULL )
+		return NULL;
+
+	// create and return Rectangle
+	return env->NewObject( cls, methodID, 0, 0, width, height );
+
+	JNI_COCOA_EXIT()
+	return NULL;
+}
+
+int getWindowButtonAreaWidth( NSWindow* nsWindow ) {
+	// get buttons
+	NSView* buttons[3] = {
+		[nsWindow standardWindowButton:NSWindowCloseButton],
+		[nsWindow standardWindowButton:NSWindowMiniaturizeButton],
+		[nsWindow standardWindowButton:NSWindowZoomButton]
+	};
+
+	// get most left and right coordinates
+	int left = -1;
+	int right = -1;
+	for( int i = 0; i < 3; i++ ) {
+		NSView* button = buttons[i];
+		if( button == NULL )
+			continue;
+
+		int x = [button convertRect: [button bounds] toView:button.superview].origin.x;
+		int width = button.bounds.size.width;
+		if( left == -1 || x < left )
+			left = x;
+		if( right == -1 || x + width > right )
+			right = x + width;
+	}
+
+	if( left == -1 || right == -1 )
+		return -1;
+
+	// 'right' is the actual button area width (from left window edge)
+	// adding 'left' to add same empty space on right side as on left side
+	return right + left;
+}
+
+int getWindowTitleBarHeight( NSWindow* nsWindow ) {
+	NSView* closeButton = [nsWindow standardWindowButton:NSWindowCloseButton];
+	if( closeButton == NULL )
+		return -1;
+
+	NSView* titlebar = closeButton.superview;
+	return titlebar.bounds.size.height;
+}
+
+extern "C"
+JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_isWindowFullScreen
+	( JNIEnv* env, jclass cls, jobject window )
+{
+	JNI_COCOA_ENTER()
+
+	NSWindow* nsWindow = getNSWindow( env, cls, window );
+	if( nsWindow == NULL )
+		return FALSE;
+
+	return (jboolean) isWindowFullScreen( nsWindow );
+
+	JNI_COCOA_EXIT()
+	return FALSE;
+}
+
+bool isWindowFullScreen( NSWindow* nsWindow ) {
+	return ((nsWindow.styleMask & NSWindowStyleMaskFullScreen) != 0);
+}
+
+extern "C"
+JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_toggleWindowFullScreen
+	( JNIEnv* env, jclass cls, jobject window )
+{
+	JNI_COCOA_ENTER()
+
+	NSWindow* nsWindow = getNSWindow( env, cls, window );
+	if( nsWindow == NULL )
+		return FALSE;
+
+	[FlatJNFRunLoop performOnMainThreadWaiting:NO withBlock:^(){
+		[nsWindow toggleFullScreen:nil];
+	}];
+
+	return TRUE;
+
+	JNI_COCOA_EXIT()
+	return FALSE;
+}

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/FlatWndProc.cpp

@@ -377,6 +377,7 @@ LRESULT FlatWndProc::WmNcCalcSize( HWND hwnd, int uMsg, WPARAM wParam, LPARAM lP
 			// (using MONITOR_DEFAULTTONEAREST finds right monitor when restoring from minimized)
 			HMONITOR hMonitor = ::MonitorFromWindow( hwnd, MONITOR_DEFAULTTONEAREST );
 			MONITORINFO monitorInfo{ 0 };
+			monitorInfo.cbSize = sizeof( monitorInfo );
 			::GetMonitorInfo( hMonitor, &monitorInfo );
 
 			// If there's a taskbar on any side of the monitor, reduce our size
@@ -537,7 +538,6 @@ void FlatWndProc::setMenuItemState( HMENU systemMenu, int item, bool enabled ) {
 	MENUITEMINFO mii{ 0 };
 	mii.cbSize = sizeof( mii );
 	mii.fMask = MIIM_STATE;
-	mii.fType = MFT_STRING;
 	mii.fState = enabled ? MF_ENABLED : MF_DISABLED;
 	::SetMenuItemInfo( systemMenu, item, FALSE, &mii );
 }

flatlaf-testing/build.gradle.kts

@@ -41,6 +41,8 @@ dependencies {
 	implementation( libs.jide.oss )
 	implementation( libs.glazedlists )
 	implementation( libs.netbeans.api.awt )
+
+	components.all<TargetJvmVersion8Rule>()
 }
 
 applyLafs()
@@ -58,3 +60,13 @@ fun applyLafs() {
 			dependencies.implementation( parts[2] )
 	}
 }
+
+// rule that overrides 'org.gradle.jvm.version' with '8'
+// (required for Radiance, which requires Java 9, but FlatLaf build uses Java 8)
+abstract class TargetJvmVersion8Rule : ComponentMetadataRule {
+	override fun execute( context: ComponentMetadataContext ) {
+		context.details.allVariants {
+			attributes.attribute( TargetJvmVersion.TARGET_JVM_VERSION_ATTRIBUTE, 8 )
+		}
+	}
+}

flatlaf-testing/dumps/uidefaults/FlatDarkLaf_1.8.0.txt

@@ -1111,6 +1111,7 @@ Table.dropCellBackground       [lazy] #3c588b  HSL 219  40  39    javax.swing.pl
 Table.dropCellForeground       [lazy] #bbbbbb  HSL   0   0  73    javax.swing.plaf.ColorUIResource [UI]
 Table.dropLineColor            [lazy] #6d8ac0  HSL 219  40  59    javax.swing.plaf.ColorUIResource [UI]
 Table.dropLineShortColor       [lazy] #b4c3df  HSL 219  40  79    javax.swing.plaf.ColorUIResource [UI]
+Table.editorSelectAllOnStartEditing true
 Table.focusCellBackground      #46494b  HSL 204   3  28    javax.swing.plaf.ColorUIResource [UI]
 Table.focusCellForeground      #bbbbbb  HSL   0   0  73    javax.swing.plaf.ColorUIResource [UI]
 Table.focusCellHighlightBorder [lazy] 2,3,2,3  false    com.formdev.flatlaf.ui.FlatTableCellBorder$Focused [UI]    lineColor=#6d8ac0  HSL 219  40  59    javax.swing.plaf.ColorUIResource [UI]    lineThickness=1.000000
@@ -1119,6 +1120,7 @@ Table.font                     [active] $defaultFont [UI]
 Table.foreground               #bbbbbb  HSL   0   0  73    javax.swing.plaf.ColorUIResource [UI]
 Table.gridColor                #5a5e60  HSL 200   3  36    javax.swing.plaf.ColorUIResource [UI]
 Table.intercellSpacing         0,0    javax.swing.plaf.DimensionUIResource [UI]
+Table.paintOutsideAlternateRows false
 Table.rowHeight                20
 Table.scrollPaneBorder         [lazy] 1,1,1,1  false    com.formdev.flatlaf.ui.FlatScrollPaneBorder [UI]
 Table.selectionBackground      #4b6eaf  HSL 219  40  49    javax.swing.plaf.ColorUIResource [UI]
@@ -1264,7 +1266,6 @@ TitlePane.inactiveBackground   #303234  HSL 210   4  20    javax.swing.plaf.Colo
 TitlePane.inactiveForeground   #8c8c8c  HSL   0   0  55    javax.swing.plaf.ColorUIResource [UI]
 TitlePane.maximizeIcon         [lazy] 44,30    com.formdev.flatlaf.icons.FlatWindowMaximizeIcon [UI]
 TitlePane.menuBarEmbedded      true
-TitlePane.menuBarResizeHeight  4
 TitlePane.menuBarTitleGap      40
 TitlePane.menuBarTitleMinimumGap 12
 TitlePane.noIconLeftGap        8

flatlaf-testing/dumps/uidefaults/FlatLightLaf_1.8.0.txt

@@ -1116,6 +1116,7 @@ Table.dropCellBackground       [lazy] #3f8fd9  HSL 209  67  55    javax.swing.pl
 Table.dropCellForeground       [lazy] #ffffff  HSL   0   0 100    javax.swing.plaf.ColorUIResource [UI]
 Table.dropLineColor            [lazy] #6aa7e1  HSL 209  66  65    javax.swing.plaf.ColorUIResource [UI]
 Table.dropLineShortColor       [lazy] #15416a  HSL 209  67  25    javax.swing.plaf.ColorUIResource [UI]
+Table.editorSelectAllOnStartEditing true
 Table.focusCellBackground      #ffffff  HSL   0   0 100    javax.swing.plaf.ColorUIResource [UI]
 Table.focusCellForeground      #000000  HSL   0   0   0    javax.swing.plaf.ColorUIResource [UI]
 Table.focusCellHighlightBorder [lazy] 2,3,2,3  false    com.formdev.flatlaf.ui.FlatTableCellBorder$Focused [UI]    lineColor=#15416a  HSL 209  67  25    javax.swing.plaf.ColorUIResource [UI]    lineThickness=1.000000
@@ -1124,6 +1125,7 @@ Table.font                     [active] $defaultFont [UI]
 Table.foreground               #000000  HSL   0   0   0    javax.swing.plaf.ColorUIResource [UI]
 Table.gridColor                #ebebeb  HSL   0   0  92    javax.swing.plaf.ColorUIResource [UI]
 Table.intercellSpacing         0,0    javax.swing.plaf.DimensionUIResource [UI]
+Table.paintOutsideAlternateRows false
 Table.rowHeight                20
 Table.scrollPaneBorder         [lazy] 1,1,1,1  false    com.formdev.flatlaf.ui.FlatScrollPaneBorder [UI]
 Table.selectionBackground      #2675bf  HSL 209  67  45    javax.swing.plaf.ColorUIResource [UI]
@@ -1269,7 +1271,6 @@ TitlePane.inactiveBackground   #ffffff  HSL   0   0 100    javax.swing.plaf.Colo
 TitlePane.inactiveForeground   #8c8c8c  HSL   0   0  55    javax.swing.plaf.ColorUIResource [UI]
 TitlePane.maximizeIcon         [lazy] 44,30    com.formdev.flatlaf.icons.FlatWindowMaximizeIcon [UI]
 TitlePane.menuBarEmbedded      true
-TitlePane.menuBarResizeHeight  4
 TitlePane.menuBarTitleGap      40
 TitlePane.menuBarTitleMinimumGap 12
 TitlePane.noIconLeftGap        8

flatlaf-testing/dumps/uidefaults/FlatLightLaf_ActionMap_1.8.0.txt

@@ -322,7 +322,7 @@ OS     Windows 10
 #---- javax.swing.JMenuBar ----
 
 1       javax.swing.plaf.basic.LazyActionMap [UI]
-    takeFocus                            com.formdev.flatlaf.ui.FlatMenuBarUI$TakeFocus (null)
+    takeFocus                            com.formdev.flatlaf.ui.FlatMenuBarUI$TakeFocusAction
 
 
 #---- javax.swing.JMenuItem ----
@@ -613,7 +613,7 @@ OS     Windows 10
     selectPreviousRowCell                javax.swing.plaf.basic.BasicTableUI$Actions
     selectPreviousRowChangeLead          javax.swing.plaf.basic.BasicTableUI$Actions
     selectPreviousRowExtendSelection     javax.swing.plaf.basic.BasicTableUI$Actions
-    startEditing                         javax.swing.plaf.basic.BasicTableUI$Actions
+    startEditing                         com.formdev.flatlaf.ui.FlatTableUI$StartEditingAction
     toggleAndAnchor                      javax.swing.plaf.basic.BasicTableUI$Actions
 
 

flatlaf-testing/dumps/uidefaults/FlatMacDarkLaf_1.8.0.txt

@@ -1121,6 +1121,7 @@ Table.dropCellBackground       [lazy] #003f99  HSL 215 100  30    javax.swing.pl
 Table.dropCellForeground       [lazy] #ffffff  HSL   0   0 100    javax.swing.plaf.ColorUIResource [UI]
 Table.dropLineColor            [lazy] #0069ff  HSL 215 100  50    javax.swing.plaf.ColorUIResource [UI]
 Table.dropLineShortColor       [lazy] #66a5ff  HSL 215 100  70    javax.swing.plaf.ColorUIResource [UI]
+Table.editorSelectAllOnStartEditing true
 Table.focusCellBackground      #282828  HSL   0   0  16    javax.swing.plaf.ColorUIResource [UI]
 Table.focusCellForeground      #dddddd  HSL   0   0  87    javax.swing.plaf.ColorUIResource [UI]
 Table.focusCellHighlightBorder [lazy] 2,3,2,3  false    com.formdev.flatlaf.ui.FlatTableCellBorder$Focused [UI]    lineColor=#0069ff  HSL 215 100  50    javax.swing.plaf.ColorUIResource [UI]    lineThickness=1.000000
@@ -1129,6 +1130,7 @@ Table.font                     [active] $defaultFont [UI]
 Table.foreground               #dddddd  HSL   0   0  87    javax.swing.plaf.ColorUIResource [UI]
 Table.gridColor                #3c3c3c  HSL   0   0  24    javax.swing.plaf.ColorUIResource [UI]
 Table.intercellSpacing         0,0    javax.swing.plaf.DimensionUIResource [UI]
+Table.paintOutsideAlternateRows false
 Table.rowHeight                20
 Table.scrollPaneBorder         [lazy] 3,3,3,3  false    com.formdev.flatlaf.ui.FlatScrollPaneBorder [UI]
 Table.selectionBackground      #0054cc  HSL 215 100  40    javax.swing.plaf.ColorUIResource [UI]
@@ -1274,7 +1276,6 @@ TitlePane.inactiveBackground   #323232  HSL   0   0  20    javax.swing.plaf.Colo
 TitlePane.inactiveForeground   #9a9a9a  HSL   0   0  60    javax.swing.plaf.ColorUIResource [UI]
 TitlePane.maximizeIcon         [lazy] 44,30    com.formdev.flatlaf.icons.FlatWindowMaximizeIcon [UI]
 TitlePane.menuBarEmbedded      true
-TitlePane.menuBarResizeHeight  4
 TitlePane.menuBarTitleGap      40
 TitlePane.menuBarTitleMinimumGap 12
 TitlePane.noIconLeftGap        8

flatlaf-testing/dumps/uidefaults/FlatMacLightLaf_1.8.0.txt

@@ -1125,6 +1125,7 @@ Table.dropCellBackground       [lazy] #1a79ff  HSL 215 100  55    javax.swing.pl
 Table.dropCellForeground       [lazy] #ffffff  HSL   0   0 100    javax.swing.plaf.ColorUIResource [UI]
 Table.dropLineColor            [lazy] #4d97ff  HSL 215 100  65    javax.swing.plaf.ColorUIResource [UI]
 Table.dropLineShortColor       [lazy] #003580  HSL 215 100  25    javax.swing.plaf.ColorUIResource [UI]
+Table.editorSelectAllOnStartEditing true
 Table.focusCellBackground      #ffffff  HSL   0   0 100    javax.swing.plaf.ColorUIResource [UI]
 Table.focusCellForeground      #262626  HSL   0   0  15    javax.swing.plaf.ColorUIResource [UI]
 Table.focusCellHighlightBorder [lazy] 2,3,2,3  false    com.formdev.flatlaf.ui.FlatTableCellBorder$Focused [UI]    lineColor=#003580  HSL 215 100  25    javax.swing.plaf.ColorUIResource [UI]    lineThickness=1.000000
@@ -1133,6 +1134,7 @@ Table.font                     [active] $defaultFont [UI]
 Table.foreground               #262626  HSL   0   0  15    javax.swing.plaf.ColorUIResource [UI]
 Table.gridColor                #ebebeb  HSL   0   0  92    javax.swing.plaf.ColorUIResource [UI]
 Table.intercellSpacing         0,0    javax.swing.plaf.DimensionUIResource [UI]
+Table.paintOutsideAlternateRows false
 Table.rowHeight                20
 Table.scrollPaneBorder         [lazy] 3,3,3,3  false    com.formdev.flatlaf.ui.FlatScrollPaneBorder [UI]
 Table.selectionBackground      #005fe6  HSL 215 100  45    javax.swing.plaf.ColorUIResource [UI]
@@ -1278,7 +1280,6 @@ TitlePane.inactiveBackground   #ececec  HSL   0   0  93    javax.swing.plaf.Colo
 TitlePane.inactiveForeground   #b6b6b6  HSL   0   0  71    javax.swing.plaf.ColorUIResource [UI]
 TitlePane.maximizeIcon         [lazy] 44,30    com.formdev.flatlaf.icons.FlatWindowMaximizeIcon [UI]
 TitlePane.menuBarEmbedded      true
-TitlePane.menuBarResizeHeight  4
 TitlePane.menuBarTitleGap      40
 TitlePane.menuBarTitleMinimumGap 12
 TitlePane.noIconLeftGap        8

flatlaf-testing/dumps/uidefaults/FlatTestLaf_1.8.0.txt

@@ -1149,6 +1149,7 @@ Table.dropCellBackground       #ff0000  HSL   0 100  50    javax.swing.plaf.Colo
 Table.dropCellForeground       #00ff00  HSL 120 100  50    javax.swing.plaf.ColorUIResource [UI]
 Table.dropLineColor            #0000ff  HSL 240 100  50    javax.swing.plaf.ColorUIResource [UI]
 Table.dropLineShortColor       #ffff00  HSL  60 100  50    javax.swing.plaf.ColorUIResource [UI]
+Table.editorSelectAllOnStartEditing true
 Table.focusCellBackground      #fffff0  HSL  60 100  97    javax.swing.plaf.ColorUIResource [UI]
 Table.focusCellForeground      #ff0000  HSL   0 100  50    javax.swing.plaf.ColorUIResource [UI]
 Table.focusCellHighlightBorder [lazy] 2,3,2,3  false    com.formdev.flatlaf.ui.FlatTableCellBorder$Focused [UI]    lineColor=#ff0000  HSL   0 100  50    javax.swing.plaf.ColorUIResource [UI]    lineThickness=1.000000
@@ -1157,6 +1158,7 @@ Table.font                     [active] $defaultFont [UI]
 Table.foreground               #ff0000  HSL   0 100  50    javax.swing.plaf.ColorUIResource [UI]
 Table.gridColor                #00ffff  HSL 180 100  50    javax.swing.plaf.ColorUIResource [UI]
 Table.intercellSpacing         0,0    javax.swing.plaf.DimensionUIResource [UI]
+Table.paintOutsideAlternateRows false
 Table.rowHeight                25
 Table.scrollPaneBorder         [lazy] 1,9,1,9  false    com.formdev.flatlaf.ui.FlatScrollPaneBorder [UI]
 Table.selectionBackground      #00aa00  HSL 120 100  33    javax.swing.plaf.ColorUIResource [UI]
@@ -1305,7 +1307,6 @@ TitlePane.inactiveBackground   #008800  HSL 120 100  27    javax.swing.plaf.Colo
 TitlePane.inactiveForeground   #ffffff  HSL   0   0 100    javax.swing.plaf.ColorUIResource [UI]
 TitlePane.maximizeIcon         [lazy] 44,30    com.formdev.flatlaf.icons.FlatWindowMaximizeIcon [UI]
 TitlePane.menuBarEmbedded      true
-TitlePane.menuBarResizeHeight  4
 TitlePane.menuBarTitleGap      40
 TitlePane.menuBarTitleMinimumGap 12
 TitlePane.noIconLeftGap        8

flatlaf-testing/lafs.properties

@@ -1,5 +1,9 @@
-org.pushingpixels.substance.api.skin.SubstanceBusinessLookAndFeel = Substance Business;ctrl F5;org.pushing-pixels:radiance-substance:3.5.1
+org.pushingpixels.radiance.theming.api.skin.RadianceBusinessLookAndFeel = Radiance Business;ctrl F5;org.pushing-pixels:radiance-theming:7.0.1
-org.pushingpixels.substance.api.skin.SubstanceGraphiteAquaLookAndFeel = Substance Graphite Aqua;ctrl F6
+org.pushingpixels.radiance.theming.api.skin.RadianceGraphiteAquaLookAndFeel = Radiance Graphite Aqua;ctrl F6
-com.alee.laf.WebLookAndFeel = WebLaf;ctrl F11;com.weblookandfeel:weblaf-ui:1.2.13
+com.alee.laf.WebLookAndFeel = WebLaf;ctrl F11;com.weblookandfeel:weblaf-ui:1.2.14
 com.jgoodies.looks.plastic.PlasticLookAndFeel = JGoodies Looks Plastic;ctrl F12;com.jgoodies:jgoodies-looks:2.7.0
 com.jgoodies.looks.windows.WindowsLookAndFeel = JGoodies Looks Windows;ctrl F9
+mdlaf.MaterialLookAndFeel = Material-UI-Swing;shift F11;io.github.vincenzopalazzo:material-ui-swing:1.1.4
+com.github.weisj.darklaf.DarkLaf = DarkLaf;shift F12;com.github.weisj:darklaf-core:3.0.2
+com.github.weisj.darklaf.theme.laf.DarculaThemeDarklafLookAndFeel = DarkLaf Darcula;ctrl shift F12
+com.jtattoo.plaf.smart.SmartLookAndFeel = JTattoo;ctrl shift F11;com.jtattoo:JTattoo:1.6.13

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatChooserTest.java

@@ -1,221 +0,0 @@
-/*
- * Copyright 2019 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
- *
- *     http://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.testing;
-
-import java.awt.*;
-import java.io.File;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.function.Function;
-import javax.swing.*;
-import javax.swing.border.*;
-import com.formdev.flatlaf.icons.FlatFileChooserHomeFolderIcon;
-import net.miginfocom.swing.*;
-
-/**
- * @author Karl Tauber
- */
-public class FlatChooserTest
-	extends FlatTestPanel
-{
-	public static void main( String[] args ) {
-//		Locale.setDefault( Locale.FRENCH );
-//		Locale.setDefault( Locale.GERMAN );
-//		Locale.setDefault( Locale.ITALIAN );
-//		Locale.setDefault( Locale.JAPANESE );
-//		Locale.setDefault( Locale.SIMPLIFIED_CHINESE );
-//		Locale.setDefault( Locale.TRADITIONAL_CHINESE );
-
-		SwingUtilities.invokeLater( () -> {
-			FlatTestFrame frame = FlatTestFrame.create( args, "FlatChooserTest" );
-
-			UIManager.put( "FileChooser.shortcuts.filesFunction", (Function<File[], File[]>) files -> {
-				ArrayList<File> list = new ArrayList<>( Arrays.asList( files ) );
-				list.add( 0, new File( System.getProperty( "user.home" ) ) );
-				return list.toArray( new File[list.size()] );
-			} );
-
-			UIManager.put( "FileChooser.shortcuts.displayNameFunction", (Function<File, String>) file -> {
-				if( file.getAbsolutePath().equals( System.getProperty( "user.home" ) ) )
-					return "Home";
-				return null;
-			} );
-			UIManager.put( "FileChooser.shortcuts.iconFunction", (Function<File, Icon>) file -> {
-				if( file.getAbsolutePath().equals( System.getProperty( "user.home" ) ) )
-					return new FlatFileChooserHomeFolderIcon();
-				return null;
-			} );
-
-			frame.showFrame( FlatChooserTest::new );
-		} );
-	}
-
-	FlatChooserTest() {
-		initComponents();
-	}
-
-	private void showShortcuts() {
-		UIManager.put( "FileChooser.noPlacesBar", !showShortcutsCheckBox.isSelected() ? true : null );
-		fileChooser1.updateUI();
-	}
-
-	private void showAccessory() {
-		JPanel accessory = null;
-		if( showAccessoryCheckBox.isSelected() ) {
-			accessory = new JPanel( new BorderLayout() );
-			accessory.setBackground( Color.green );
-			accessory.add( new JLabel( "  Accessory  " ), BorderLayout.CENTER );
-		}
-		fileChooser1.setAccessory( accessory );
-		fileChooser1.revalidate();
-		fileChooser1.repaint();
-	}
-
-	private void initComponents() {
-		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
-		JLabel colorChooserLabel = new JLabel();
-		JPanel panel2 = new JPanel();
-		JColorChooser colorChooser1 = new JColorChooser();
-		JLabel fileChooserLabel = new JLabel();
-		JPanel panel1 = new JPanel();
-		fileChooser1 = new JFileChooser();
-		JPanel panel3 = new JPanel();
-		showShortcutsCheckBox = new JCheckBox();
-		showAccessoryCheckBox = new JCheckBox();
-		JLabel label1 = new JLabel();
-		JLabel label2 = new JLabel();
-		JLabel label3 = new JLabel();
-		JLabel label4 = new JLabel();
-		JLabel label5 = new JLabel();
-		JLabel label6 = new JLabel();
-		JLabel label7 = new JLabel();
-		JLabel label8 = new JLabel();
-		JLabel label9 = new JLabel();
-		JLabel label10 = new JLabel();
-		JLabel label11 = new JLabel();
-
-		//======== this ========
-		setLayout(new MigLayout(
-			"ltr,insets dialog,hidemode 3",
-			// columns
-			"[]" +
-			"[grow]",
-			// rows
-			"[top]" +
-			"[grow,fill]" +
-			"[]" +
-			"[]"));
-
-		//---- colorChooserLabel ----
-		colorChooserLabel.setText("JColorChooser:");
-		add(colorChooserLabel, "cell 0 0");
-
-		//======== panel2 ========
-		{
-			panel2.setBorder(new MatteBorder(4, 4, 4, 4, Color.red));
-			panel2.setLayout(new BorderLayout());
-			panel2.add(colorChooser1, BorderLayout.CENTER);
-		}
-		add(panel2, "cell 1 0");
-
-		//---- fileChooserLabel ----
-		fileChooserLabel.setText("JFileChooser:");
-		add(fileChooserLabel, "cell 0 1,aligny top,growy 0");
-
-		//======== panel1 ========
-		{
-			panel1.setBorder(new MatteBorder(4, 4, 4, 4, Color.red));
-			panel1.setLayout(new BorderLayout());
-			panel1.add(fileChooser1, BorderLayout.CENTER);
-		}
-		add(panel1, "cell 1 1,growx");
-
-		//======== panel3 ========
-		{
-			panel3.setLayout(new MigLayout(
-				"hidemode 3",
-				// columns
-				"[fill]" +
-				"[fill]",
-				// rows
-				"[]"));
-
-			//---- showShortcutsCheckBox ----
-			showShortcutsCheckBox.setText("Show Shortcuts");
-			showShortcutsCheckBox.setSelected(true);
-			showShortcutsCheckBox.addActionListener(e -> showShortcuts());
-			panel3.add(showShortcutsCheckBox, "cell 0 0");
-
-			//---- showAccessoryCheckBox ----
-			showAccessoryCheckBox.setText("Show Accessory");
-			showAccessoryCheckBox.addActionListener(e -> showAccessory());
-			panel3.add(showAccessoryCheckBox, "cell 1 0");
-		}
-		add(panel3, "cell 1 2");
-
-		//---- label1 ----
-		label1.setText("icons:");
-		add(label1, "cell 0 3");
-
-		//---- label2 ----
-		label2.setIcon(UIManager.getIcon("FileView.directoryIcon"));
-		add(label2, "cell 1 3");
-
-		//---- label3 ----
-		label3.setIcon(UIManager.getIcon("FileView.fileIcon"));
-		add(label3, "cell 1 3");
-
-		//---- label4 ----
-		label4.setIcon(UIManager.getIcon("FileView.computerIcon"));
-		add(label4, "cell 1 3");
-
-		//---- label5 ----
-		label5.setIcon(UIManager.getIcon("FileView.hardDriveIcon"));
-		add(label5, "cell 1 3");
-
-		//---- label6 ----
-		label6.setIcon(UIManager.getIcon("FileView.floppyDriveIcon"));
-		add(label6, "cell 1 3");
-
-		//---- label7 ----
-		label7.setIcon(UIManager.getIcon("FileChooser.newFolderIcon"));
-		add(label7, "cell 1 3");
-
-		//---- label8 ----
-		label8.setIcon(UIManager.getIcon("FileChooser.upFolderIcon"));
-		add(label8, "cell 1 3");
-
-		//---- label9 ----
-		label9.setIcon(UIManager.getIcon("FileChooser.homeFolderIcon"));
-		add(label9, "cell 1 3");
-
-		//---- label10 ----
-		label10.setIcon(UIManager.getIcon("FileChooser.detailsViewIcon"));
-		add(label10, "cell 1 3");
-
-		//---- label11 ----
-		label11.setIcon(UIManager.getIcon("FileChooser.listViewIcon"));
-		add(label11, "cell 1 3");
-		// JFormDesigner - End of component initialization  //GEN-END:initComponents
-	}
-
-	// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
-	private JFileChooser fileChooser1;
-	private JCheckBox showShortcutsCheckBox;
-	private JCheckBox showAccessoryCheckBox;
-	// JFormDesigner - End of variables declaration  //GEN-END:variables
-}

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatChooserTest.jfd

@@ -1,153 +0,0 @@
-JFDML JFormDesigner: "8.0.0.0.194" Java: "17.0.2" encoding: "UTF-8"
-
-new FormModel {
-	contentType: "form/swing"
-	root: new FormRoot {
-		auxiliary() {
-			"JavaCodeGenerator.defaultVariableLocal": true
-		}
-		add( new FormContainer( "com.formdev.flatlaf.testing.FlatTestPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
-			"$layoutConstraints": "ltr,insets dialog,hidemode 3"
-			"$columnConstraints": "[][grow]"
-			"$rowConstraints": "[top][grow,fill][][]"
-		} ) {
-			name: "this"
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "colorChooserLabel"
-				"text": "JColorChooser:"
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 0 0"
-			} )
-			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-				name: "panel2"
-				"border": new javax.swing.border.MatteBorder( 4, 4, 4, 4, sfield java.awt.Color red )
-				add( new FormComponent( "javax.swing.JColorChooser" ) {
-					name: "colorChooser1"
-				}, new FormLayoutConstraints( class java.lang.String ) {
-					"value": "Center"
-				} )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 0"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "fileChooserLabel"
-				"text": "JFileChooser:"
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 0 1,aligny top,growy 0"
-			} )
-			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
-				name: "panel1"
-				"border": new javax.swing.border.MatteBorder( 4, 4, 4, 4, sfield java.awt.Color red )
-				add( new FormComponent( "javax.swing.JFileChooser" ) {
-					name: "fileChooser1"
-					auxiliary() {
-						"JavaCodeGenerator.variableLocal": false
-					}
-				}, new FormLayoutConstraints( class java.lang.String ) {
-					"value": "Center"
-				} )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 1,growx"
-			} )
-			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
-				"$layoutConstraints": "hidemode 3"
-				"$columnConstraints": "[fill][fill]"
-				"$rowConstraints": "[]"
-			} ) {
-				name: "panel3"
-				add( new FormComponent( "javax.swing.JCheckBox" ) {
-					name: "showShortcutsCheckBox"
-					"text": "Show Shortcuts"
-					"selected": true
-					auxiliary() {
-						"JavaCodeGenerator.variableLocal": false
-					}
-					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "showShortcuts", false ) )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 0 0"
-				} )
-				add( new FormComponent( "javax.swing.JCheckBox" ) {
-					name: "showAccessoryCheckBox"
-					"text": "Show Accessory"
-					auxiliary() {
-						"JavaCodeGenerator.variableLocal": false
-					}
-					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "showAccessory", false ) )
-				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 1 0"
-				} )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 2"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "label1"
-				"text": "icons:"
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 0 3"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "label2"
-				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileView.directoryIcon" )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 3"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "label3"
-				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileView.fileIcon" )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 3"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "label4"
-				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileView.computerIcon" )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 3"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "label5"
-				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileView.hardDriveIcon" )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 3"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "label6"
-				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileView.floppyDriveIcon" )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 3"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "label7"
-				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileChooser.newFolderIcon" )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 3"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "label8"
-				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileChooser.upFolderIcon" )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 3"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "label9"
-				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileChooser.homeFolderIcon" )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 3"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "label10"
-				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileChooser.detailsViewIcon" )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 3"
-			} )
-			add( new FormComponent( "javax.swing.JLabel" ) {
-				name: "label11"
-				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileChooser.listViewIcon" )
-			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-				"value": "cell 1 3"
-			} )
-		}, new FormLayoutConstraints( null ) {
-			"location": new java.awt.Point( 0, 0 )
-			"size": new java.awt.Dimension( 790, 790 )
-		} )
-	}
-}

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatColorChooserTest.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2019 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
+ *
+ *     http://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.testing;
+
+import java.awt.*;
+import javax.swing.*;
+import javax.swing.border.*;
+import net.miginfocom.swing.*;
+
+/**
+ * @author Karl Tauber
+ */
+public class FlatColorChooserTest
+	extends FlatTestPanel
+{
+	public static void main( String[] args ) {
+//		Locale.setDefault( Locale.FRENCH );
+//		Locale.setDefault( Locale.GERMAN );
+//		Locale.setDefault( Locale.ITALIAN );
+//		Locale.setDefault( Locale.JAPANESE );
+//		Locale.setDefault( Locale.SIMPLIFIED_CHINESE );
+//		Locale.setDefault( Locale.TRADITIONAL_CHINESE );
+
+		SwingUtilities.invokeLater( () -> {
+			FlatTestFrame frame = FlatTestFrame.create( args, "FlatColorChooserTest" );
+			frame.showFrame( FlatColorChooserTest::new );
+		} );
+	}
+
+	FlatColorChooserTest() {
+		initComponents();
+	}
+
+	private void initComponents() {
+		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
+		JLabel colorChooserLabel = new JLabel();
+		JPanel panel2 = new JPanel();
+		JColorChooser colorChooser1 = new JColorChooser();
+
+		//======== this ========
+		setLayout(new MigLayout(
+			"ltr,insets dialog,hidemode 3",
+			// columns
+			"[]" +
+			"[grow]",
+			// rows
+			"[top]"));
+
+		//---- colorChooserLabel ----
+		colorChooserLabel.setText("JColorChooser:");
+		add(colorChooserLabel, "cell 0 0");
+
+		//======== panel2 ========
+		{
+			panel2.setBorder(new MatteBorder(4, 4, 4, 4, Color.red));
+			panel2.setLayout(new BorderLayout());
+			panel2.add(colorChooser1, BorderLayout.CENTER);
+		}
+		add(panel2, "cell 1 0");
+		// JFormDesigner - End of component initialization  //GEN-END:initComponents
+	}
+
+	// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
+	// JFormDesigner - End of variables declaration  //GEN-END:variables
+}

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatColorChooserTest.jfd

@@ -0,0 +1,37 @@
+JFDML JFormDesigner: "8.2.0.0.331" Java: "21" encoding: "UTF-8"
+
+new FormModel {
+	contentType: "form/swing"
+	root: new FormRoot {
+		auxiliary() {
+			"JavaCodeGenerator.defaultVariableLocal": true
+		}
+		add( new FormContainer( "com.formdev.flatlaf.testing.FlatTestPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
+			"$layoutConstraints": "ltr,insets dialog,hidemode 3"
+			"$columnConstraints": "[][grow]"
+			"$rowConstraints": "[top]"
+		} ) {
+			name: "this"
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "colorChooserLabel"
+				"text": "JColorChooser:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 0"
+			} )
+			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+				name: "panel2"
+				"border": new javax.swing.border.MatteBorder( 4, 4, 4, 4, sfield java.awt.Color red )
+				add( new FormComponent( "javax.swing.JColorChooser" ) {
+					name: "colorChooser1"
+				}, new FormLayoutConstraints( class java.lang.String ) {
+					"value": "Center"
+				} )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 0"
+			} )
+		}, new FormLayoutConstraints( null ) {
+			"location": new java.awt.Point( 0, 0 )
+			"size": new java.awt.Dimension( 790, 790 )
+		} )
+	}
+}

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatFileChooserTest.java

@@ -0,0 +1,556 @@
+/*
+ * Copyright 2019 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
+ *
+ *     http://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.testing;
+
+import java.awt.*;
+import java.beans.PropertyChangeEvent;
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Locale;
+import java.util.ResourceBundle;
+import java.util.function.Function;
+import javax.swing.*;
+import javax.swing.border.*;
+import javax.swing.filechooser.FileFilter;
+import javax.swing.filechooser.FileNameExtensionFilter;
+import javax.swing.filechooser.FileSystemView;
+import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.icons.FlatFileChooserHomeFolderIcon;
+import com.formdev.flatlaf.ui.JavaCompatibility2;
+import net.miginfocom.swing.*;
+
+/**
+ * @author Karl Tauber
+ */
+public class FlatFileChooserTest
+	extends FlatTestPanel
+{
+	public static void main( String[] args ) {
+//		Locale.setDefault( Locale.FRENCH );
+//		Locale.setDefault( Locale.GERMAN );
+//		Locale.setDefault( Locale.ITALIAN );
+//		Locale.setDefault( Locale.JAPANESE );
+//		Locale.setDefault( Locale.SIMPLIFIED_CHINESE );
+//		Locale.setDefault( Locale.TRADITIONAL_CHINESE );
+
+		SwingUtilities.invokeLater( () -> {
+			FlatTestFrame frame = FlatTestFrame.create( args, "FlatFileChooserTest" );
+
+			UIManager.put( "FileChooser.shortcuts.filesFunction", (Function<File[], File[]>) files -> {
+				ArrayList<File> list = new ArrayList<>( Arrays.asList( files ) );
+				list.add( 0, new File( System.getProperty( "user.home" ) ) );
+				return list.toArray( new File[list.size()] );
+			} );
+
+			UIManager.put( "FileChooser.shortcuts.displayNameFunction", (Function<File, String>) file -> {
+				if( file.getAbsolutePath().equals( System.getProperty( "user.home" ) ) )
+					return "Home";
+				return null;
+			} );
+			UIManager.put( "FileChooser.shortcuts.iconFunction", (Function<File, Icon>) file -> {
+				if( file.getAbsolutePath().equals( System.getProperty( "user.home" ) ) )
+					return new FlatFileChooserHomeFolderIcon();
+				return null;
+			} );
+
+			frame.showFrame( FlatFileChooserTest::new );
+		} );
+	}
+
+	FlatFileChooserTest() {
+		initComponents();
+
+		dialogTypeField.init( DialogType.class, false );
+		fileSelectionModeField.init( FileSelectionMode.class, false );
+		localesField.init( Locales.class, false );
+
+		showControlButtonsCheckBox.setSelected( fileChooser1.getControlButtonsAreShown() );
+		multiSelectionCheckBox.setSelected( fileChooser1.isMultiSelectionEnabled() );
+		fileHidingCheckBox.setSelected( fileChooser1.isFileHidingEnabled() );
+		dragCheckBox.setSelected( fileChooser1.getDragEnabled() );
+		filterAllFilesCheckBox.setSelected( fileChooser1.isAcceptAllFileFilterUsed() );
+
+		updateOutput();
+	}
+
+	private void fileChooser1PropertyChange( PropertyChangeEvent e ) {
+		switch( e.getPropertyName() ) {
+			case JFileChooser.DIRECTORY_CHANGED_PROPERTY:
+			case JFileChooser.SELECTED_FILE_CHANGED_PROPERTY:
+			case JFileChooser.SELECTED_FILES_CHANGED_PROPERTY:
+				updateOutput();
+				break;
+		}
+	}
+
+	private void updateOutput() {
+		currentDirectoryField.setText( String.valueOf( fileChooser1.getCurrentDirectory() ) );
+		selectedFileField.setText( String.valueOf( fileChooser1.getSelectedFile() ) );
+		selectedFilesField.setText( Arrays.toString( fileChooser1.getSelectedFiles() ) );
+	}
+
+	private void dialogTypeChanged() {
+		DialogType value = dialogTypeField.getSelectedValue();
+		int dialogType = (value != null) ? value.value : JFileChooser.OPEN_DIALOG;
+
+		if( dialogType == JFileChooser.CUSTOM_DIALOG )
+			fileChooser1.setApproveButtonText( "Custom" );
+		fileChooser1.setDialogType( dialogType );
+	}
+
+	private void fileSelectionModeChanged() {
+		FileSelectionMode value = fileSelectionModeField.getSelectedValue();
+		int mode = (value != null) ? value.value : JFileChooser.FILES_ONLY;
+
+		fileChooser1.setFileSelectionMode( mode );
+	}
+
+	private void showControlButtons() {
+		fileChooser1.setControlButtonsAreShown( showControlButtonsCheckBox.isSelected() );
+		fileChooser1.revalidate();
+		fileChooser1.repaint();
+	}
+
+	private void showShortcuts() {
+		UIManager.put( "FileChooser.noPlacesBar", !showShortcutsCheckBox.isSelected() ? true : null );
+		fileChooser1.updateUI();
+	}
+
+	private void showAccessory() {
+		JPanel accessory = null;
+		if( showAccessoryCheckBox.isSelected() ) {
+			accessory = new JPanel( new BorderLayout() );
+			accessory.setBackground( Color.green );
+			accessory.add( new JLabel( "  Accessory  " ), BorderLayout.CENTER );
+		}
+		fileChooser1.setAccessory( accessory );
+		fileChooser1.revalidate();
+		fileChooser1.repaint();
+	}
+
+	private void multiSelection() {
+		fileChooser1.setMultiSelectionEnabled( multiSelectionCheckBox.isSelected() );
+	}
+
+	private void fileHiding() {
+		fileChooser1.setFileHidingEnabled( fileHidingCheckBox.isSelected() );
+	}
+
+	private void drag() {
+		fileChooser1.setDragEnabled( dragCheckBox.isSelected() );
+	}
+
+	private final FileFilter TEXT_FILTER = new FileNameExtensionFilter( "Text Files", "txt", "md" );
+	private final FileFilter IMAGES_FILTER = new FileNameExtensionFilter( "Images", "png", "git", "jpg", "jpeg" );
+	private final FileFilter LONG_DESC_FILTER = new FileNameExtensionFilter( "Some long description (.abc, .def, .ghi, .jkl)", "dummy" );
+	private final FileFilter EXTRA_LONG_DESC_FILTER = new FileNameExtensionFilter( "Some super extra long description (.abc, .def, .ghi, .jkl, .mno, .pqr, .stu)", "dummy" );
+
+	private void filterChanged() {
+		boolean all = filterAllFilesCheckBox.isSelected();
+		if( all != fileChooser1.isAcceptAllFileFilterUsed() )
+			fileChooser1.setAcceptAllFileFilterUsed( all );
+
+		addRemoveFilter( filterTextFilesCheckBox.isSelected(), TEXT_FILTER );
+		addRemoveFilter( filterImagesCheckBox.isSelected(), IMAGES_FILTER );
+		addRemoveFilter( filterLongDescCheckBox.isSelected(), LONG_DESC_FILTER );
+		addRemoveFilter( filterExtraLongDescCheckBox.isSelected(), EXTRA_LONG_DESC_FILTER );
+	}
+
+	private void addRemoveFilter( boolean add, FileFilter filter ) {
+		if( add )
+			fileChooser1.addChoosableFileFilter( filter );
+		else
+			fileChooser1.removeChoosableFileFilter( filter );
+	}
+
+	private void localesChanged() {
+		Locales value = localesField.getSelectedValue();
+		Locale locale = (value != null) ? value.value : Locale.ENGLISH;
+
+		SwingUtilities.invokeLater( () -> {
+			Locale.setDefault( locale );
+			JComponent.setDefaultLocale( locale );
+			fileChooser1.setLocale( locale );
+			ResourceBundle.clearCache();
+
+			try {
+				UIManager.setLookAndFeel( UIManager.getLookAndFeel().getClass().getName() );
+				FlatLaf.updateUI();
+			} catch( Exception ex ) {
+				ex.printStackTrace();
+			}
+		} );
+	}
+
+	private void printShortcutFiles() {
+		printFiles( JavaCompatibility2.getChooserShortcutPanelFiles( fileChooser1.getFileSystemView() ) );
+	}
+
+	private void printComboBoxFiles() {
+		printFiles( JavaCompatibility2.getChooserComboBoxFiles( fileChooser1.getFileSystemView() ) );
+	}
+
+	private void printRoots() {
+		FileSystemView fsv = fileChooser1.getFileSystemView();
+		File[] roots = fsv.getRoots();
+		printFiles( roots );
+
+		for( File root : roots )
+			printFiles( fsv.getFiles( root, true ) );
+	}
+
+	private void printFiles( File[] files ) {
+		System.out.println( "--------------------------------" );
+		FileSystemView fsv = fileChooser1.getFileSystemView();
+		for( File file : files ) {
+			System.out.printf( "%-30s   ", file );
+			System.out.println(
+				(fsv.isComputerNode( file ) ? "computer " : "") +
+				(fsv.isDrive( file ) ? "drive " : "") +
+				(fsv.isFileSystem( file ) ? "fileSystem " : "") +
+				(fsv.isFileSystemRoot( file ) ? "fileSystemRoot " : "") +
+				(fsv.isFloppyDrive( file ) ? "floppyDrive " : "") +
+				(fsv.isHiddenFile( file ) ? "hiddenFile " : "") +
+				(fsv.isRoot( file ) ? "root " : "") +
+				(fsv.isTraversable( file ) ? "traversable " : "") );
+		}
+	}
+
+	private void initComponents() {
+		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
+		JLabel fileChooserLabel = new JLabel();
+		JPanel panel1 = new JPanel();
+		fileChooser1 = new JFileChooser();
+		JLabel currentDirectoryLabel = new JLabel();
+		currentDirectoryField = new JTextField();
+		JLabel selectedFileLabel = new JLabel();
+		selectedFileField = new JTextField();
+		JLabel selectedFilesLabel = new JLabel();
+		selectedFilesField = new JTextField();
+		JLabel dialogTypeLabel = new JLabel();
+		dialogTypeField = new FlatTestEnumSelector<>();
+		showControlButtonsCheckBox = new JCheckBox();
+		showShortcutsCheckBox = new JCheckBox();
+		showAccessoryCheckBox = new JCheckBox();
+		JLabel fileSelectionModeLabel = new JLabel();
+		fileSelectionModeField = new FlatTestEnumSelector<>();
+		multiSelectionCheckBox = new JCheckBox();
+		fileHidingCheckBox = new JCheckBox();
+		dragCheckBox = new JCheckBox();
+		JLabel filtersLabel = new JLabel();
+		filterAllFilesCheckBox = new JCheckBox();
+		filterTextFilesCheckBox = new JCheckBox();
+		filterImagesCheckBox = new JCheckBox();
+		filterLongDescCheckBox = new JCheckBox();
+		filterExtraLongDescCheckBox = new JCheckBox();
+		printShortcutFilesButton = new JButton();
+		printComboBoxFilesButton = new JButton();
+		printRootsButton = new JButton();
+		JLabel localesLabel = new JLabel();
+		localesField = new FlatTestEnumSelector<>();
+		JLabel label1 = new JLabel();
+		JLabel label2 = new JLabel();
+		JLabel label3 = new JLabel();
+		JLabel label4 = new JLabel();
+		JLabel label5 = new JLabel();
+		JLabel label6 = new JLabel();
+		JLabel label7 = new JLabel();
+		JLabel label8 = new JLabel();
+		JLabel label9 = new JLabel();
+		JLabel label10 = new JLabel();
+		JLabel label11 = new JLabel();
+
+		//======== this ========
+		setLayout(new MigLayout(
+			"ltr,insets dialog,hidemode 3",
+			// columns
+			"[]" +
+			"[]" +
+			"[grow]",
+			// rows
+			"[grow,fill]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]" +
+			"[]para" +
+			"[]"));
+
+		//---- fileChooserLabel ----
+		fileChooserLabel.setText("JFileChooser:");
+		add(fileChooserLabel, "cell 0 0,aligny top,growy 0");
+
+		//======== panel1 ========
+		{
+			panel1.setBorder(new MatteBorder(4, 4, 4, 4, Color.red));
+			panel1.setLayout(new BorderLayout());
+
+			//---- fileChooser1 ----
+			fileChooser1.addPropertyChangeListener(e -> fileChooser1PropertyChange(e));
+			panel1.add(fileChooser1, BorderLayout.CENTER);
+		}
+		add(panel1, "cell 1 0 2 1,growx");
+
+		//---- currentDirectoryLabel ----
+		currentDirectoryLabel.setText("Current Directory:");
+		add(currentDirectoryLabel, "cell 0 1");
+
+		//---- currentDirectoryField ----
+		currentDirectoryField.setEditable(false);
+		add(currentDirectoryField, "cell 1 1 2 1,growx");
+
+		//---- selectedFileLabel ----
+		selectedFileLabel.setText("Selected File:");
+		add(selectedFileLabel, "cell 0 2");
+
+		//---- selectedFileField ----
+		selectedFileField.setEditable(false);
+		add(selectedFileField, "cell 1 2 2 1,growx");
+
+		//---- selectedFilesLabel ----
+		selectedFilesLabel.setText("Selected Files:");
+		add(selectedFilesLabel, "cell 0 3");
+
+		//---- selectedFilesField ----
+		selectedFilesField.setEditable(false);
+		add(selectedFilesField, "cell 1 3 2 1,growx");
+
+		//---- dialogTypeLabel ----
+		dialogTypeLabel.setText("Dialog Type:");
+		add(dialogTypeLabel, "cell 0 4");
+
+		//---- dialogTypeField ----
+		dialogTypeField.addActionListener(e -> dialogTypeChanged());
+		add(dialogTypeField, "cell 1 4");
+
+		//---- showControlButtonsCheckBox ----
+		showControlButtonsCheckBox.setText("Show Control Buttons");
+		showControlButtonsCheckBox.addActionListener(e -> showControlButtons());
+		add(showControlButtonsCheckBox, "cell 2 4");
+
+		//---- showShortcutsCheckBox ----
+		showShortcutsCheckBox.setText("Show Shortcuts");
+		showShortcutsCheckBox.setSelected(true);
+		showShortcutsCheckBox.addActionListener(e -> showShortcuts());
+		add(showShortcutsCheckBox, "cell 2 4");
+
+		//---- showAccessoryCheckBox ----
+		showAccessoryCheckBox.setText("Show Accessory");
+		showAccessoryCheckBox.addActionListener(e -> showAccessory());
+		add(showAccessoryCheckBox, "cell 2 4");
+
+		//---- fileSelectionModeLabel ----
+		fileSelectionModeLabel.setText("File Selection Mode:");
+		add(fileSelectionModeLabel, "cell 0 5");
+
+		//---- fileSelectionModeField ----
+		fileSelectionModeField.addActionListener(e -> fileSelectionModeChanged());
+		add(fileSelectionModeField, "cell 1 5");
+
+		//---- multiSelectionCheckBox ----
+		multiSelectionCheckBox.setText("Multi Selection");
+		multiSelectionCheckBox.addActionListener(e -> multiSelection());
+		add(multiSelectionCheckBox, "cell 2 5");
+
+		//---- fileHidingCheckBox ----
+		fileHidingCheckBox.setText("File Hiding");
+		fileHidingCheckBox.addActionListener(e -> fileHiding());
+		add(fileHidingCheckBox, "cell 2 5");
+
+		//---- dragCheckBox ----
+		dragCheckBox.setText("Drag");
+		dragCheckBox.addActionListener(e -> drag());
+		add(dragCheckBox, "cell 2 5");
+
+		//---- filtersLabel ----
+		filtersLabel.setText("Filters:");
+		add(filtersLabel, "cell 0 6");
+
+		//---- filterAllFilesCheckBox ----
+		filterAllFilesCheckBox.setText("All Files");
+		filterAllFilesCheckBox.addActionListener(e -> filterChanged());
+		add(filterAllFilesCheckBox, "cell 1 6 2 1");
+
+		//---- filterTextFilesCheckBox ----
+		filterTextFilesCheckBox.setText("Text Files");
+		filterTextFilesCheckBox.addActionListener(e -> filterChanged());
+		add(filterTextFilesCheckBox, "cell 1 6 2 1");
+
+		//---- filterImagesCheckBox ----
+		filterImagesCheckBox.setText("Images");
+		filterImagesCheckBox.addActionListener(e -> filterChanged());
+		add(filterImagesCheckBox, "cell 1 6 2 1");
+
+		//---- filterLongDescCheckBox ----
+		filterLongDescCheckBox.setText("Long description");
+		filterLongDescCheckBox.addActionListener(e -> filterChanged());
+		add(filterLongDescCheckBox, "cell 1 6 2 1");
+
+		//---- filterExtraLongDescCheckBox ----
+		filterExtraLongDescCheckBox.setText("Extra Long description");
+		filterExtraLongDescCheckBox.addActionListener(e -> filterChanged());
+		add(filterExtraLongDescCheckBox, "cell 1 6 2 1");
+
+		//---- printShortcutFilesButton ----
+		printShortcutFilesButton.setText("Print Shortcut Files");
+		printShortcutFilesButton.addActionListener(e -> printShortcutFiles());
+		add(printShortcutFilesButton, "cell 1 7 2 1");
+
+		//---- printComboBoxFilesButton ----
+		printComboBoxFilesButton.setText("Print ComboBox Files");
+		printComboBoxFilesButton.addActionListener(e -> printComboBoxFiles());
+		add(printComboBoxFilesButton, "cell 1 7 2 1");
+
+		//---- printRootsButton ----
+		printRootsButton.setText("Print Roots");
+		printRootsButton.addActionListener(e -> printRoots());
+		add(printRootsButton, "cell 1 7 2 1");
+
+		//---- localesLabel ----
+		localesLabel.setText("Locales:");
+		add(localesLabel, "cell 0 8");
+
+		//---- localesField ----
+		localesField.addActionListener(e -> localesChanged());
+		add(localesField, "cell 1 8 2 1");
+
+		//---- label1 ----
+		label1.setText("icons:");
+		add(label1, "cell 0 9");
+
+		//---- label2 ----
+		label2.setIcon(UIManager.getIcon("FileView.directoryIcon"));
+		add(label2, "cell 1 9 2 1");
+
+		//---- label3 ----
+		label3.setIcon(UIManager.getIcon("FileView.fileIcon"));
+		add(label3, "cell 1 9 2 1");
+
+		//---- label4 ----
+		label4.setIcon(UIManager.getIcon("FileView.computerIcon"));
+		add(label4, "cell 1 9 2 1");
+
+		//---- label5 ----
+		label5.setIcon(UIManager.getIcon("FileView.hardDriveIcon"));
+		add(label5, "cell 1 9 2 1");
+
+		//---- label6 ----
+		label6.setIcon(UIManager.getIcon("FileView.floppyDriveIcon"));
+		add(label6, "cell 1 9 2 1");
+
+		//---- label7 ----
+		label7.setIcon(UIManager.getIcon("FileChooser.newFolderIcon"));
+		add(label7, "cell 1 9 2 1");
+
+		//---- label8 ----
+		label8.setIcon(UIManager.getIcon("FileChooser.upFolderIcon"));
+		add(label8, "cell 1 9 2 1");
+
+		//---- label9 ----
+		label9.setIcon(UIManager.getIcon("FileChooser.homeFolderIcon"));
+		add(label9, "cell 1 9 2 1");
+
+		//---- label10 ----
+		label10.setIcon(UIManager.getIcon("FileChooser.detailsViewIcon"));
+		add(label10, "cell 1 9 2 1");
+
+		//---- label11 ----
+		label11.setIcon(UIManager.getIcon("FileChooser.listViewIcon"));
+		add(label11, "cell 1 9 2 1");
+		// JFormDesigner - End of component initialization  //GEN-END:initComponents
+	}
+
+	// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
+	private JFileChooser fileChooser1;
+	private JTextField currentDirectoryField;
+	private JTextField selectedFileField;
+	private JTextField selectedFilesField;
+	private FlatTestEnumSelector<DialogType> dialogTypeField;
+	private JCheckBox showControlButtonsCheckBox;
+	private JCheckBox showShortcutsCheckBox;
+	private JCheckBox showAccessoryCheckBox;
+	private FlatTestEnumSelector<FileSelectionMode> fileSelectionModeField;
+	private JCheckBox multiSelectionCheckBox;
+	private JCheckBox fileHidingCheckBox;
+	private JCheckBox dragCheckBox;
+	private JCheckBox filterAllFilesCheckBox;
+	private JCheckBox filterTextFilesCheckBox;
+	private JCheckBox filterImagesCheckBox;
+	private JCheckBox filterLongDescCheckBox;
+	private JCheckBox filterExtraLongDescCheckBox;
+	private JButton printShortcutFilesButton;
+	private JButton printComboBoxFilesButton;
+	private JButton printRootsButton;
+	private FlatTestEnumSelector<Locales> localesField;
+	// JFormDesigner - End of variables declaration  //GEN-END:variables
+
+	//---- enum DialogType ----------------------------------------------------
+
+	enum DialogType {
+		open( JFileChooser.OPEN_DIALOG ),
+		save( JFileChooser.SAVE_DIALOG ),
+		custom( JFileChooser.CUSTOM_DIALOG );
+
+		public final int value;
+
+		DialogType( int value ) {
+			this.value = value;
+		}
+	}
+
+	//---- enum FileSelectionMode ---------------------------------------------
+
+	enum FileSelectionMode {
+		files_only( JFileChooser.FILES_ONLY ),
+		directories_only( JFileChooser.DIRECTORIES_ONLY ),
+		files_and_directories( JFileChooser.FILES_AND_DIRECTORIES );
+
+		public final int value;
+
+		FileSelectionMode( int value ) {
+			this.value = value;
+		}
+	}
+
+	//---- enum Locales -------------------------------------------------------
+
+	// locales supported by Swing
+	// (see https://github.com/openjdk/jdk/tree/master/src/java.desktop/share/classes/com/sun/swing/internal/plaf/metal/resources)
+	enum Locales {
+		english( Locale.ENGLISH ),
+		german( Locale.GERMAN ),
+		spanish( new Locale( "es" ) ),
+		french( Locale.FRENCH ),
+		italian( Locale.ITALIAN ),
+		japanese( Locale.JAPANESE ),
+		korean( Locale.KOREAN ),
+		brazilian_portuguese( new Locale( "pt", "BR" ) ),
+		swedish( new Locale( "sv" ) ),
+		simplified_chinese( Locale.SIMPLIFIED_CHINESE ),
+		traditional_chinese( Locale.TRADITIONAL_CHINESE );
+
+		public final Locale value;
+
+		Locales( Locale value ) {
+			this.value = value;
+		}
+	}
+}

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatFileChooserTest.jfd

@@ -0,0 +1,347 @@
+JFDML JFormDesigner: "8.2.0.0.331" Java: "21" encoding: "UTF-8"
+
+new FormModel {
+	contentType: "form/swing"
+	root: new FormRoot {
+		auxiliary() {
+			"JavaCodeGenerator.defaultVariableLocal": true
+		}
+		add( new FormContainer( "com.formdev.flatlaf.testing.FlatTestPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
+			"$layoutConstraints": "ltr,insets dialog,hidemode 3"
+			"$columnConstraints": "[][][grow]"
+			"$rowConstraints": "[grow,fill][][][][][][][][]para[]"
+		} ) {
+			name: "this"
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "fileChooserLabel"
+				"text": "JFileChooser:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 0,aligny top,growy 0"
+			} )
+			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+				name: "panel1"
+				"border": new javax.swing.border.MatteBorder( 4, 4, 4, 4, sfield java.awt.Color red )
+				add( new FormComponent( "javax.swing.JFileChooser" ) {
+					name: "fileChooser1"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.beans.PropertyChangeListener", "propertyChange", "fileChooser1PropertyChange", true ) )
+				}, new FormLayoutConstraints( class java.lang.String ) {
+					"value": "Center"
+				} )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 0 2 1,growx"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "currentDirectoryLabel"
+				"text": "Current Directory:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 1"
+			} )
+			add( new FormComponent( "javax.swing.JTextField" ) {
+				name: "currentDirectoryField"
+				"editable": false
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 1 2 1,growx"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "selectedFileLabel"
+				"text": "Selected File:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 2"
+			} )
+			add( new FormComponent( "javax.swing.JTextField" ) {
+				name: "selectedFileField"
+				"editable": false
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 2 2 1,growx"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "selectedFilesLabel"
+				"text": "Selected Files:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 3"
+			} )
+			add( new FormComponent( "javax.swing.JTextField" ) {
+				name: "selectedFilesField"
+				"editable": false
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 3 2 1,growx"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "dialogTypeLabel"
+				"text": "Dialog Type:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 4"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.testing.FlatTestEnumSelector" ) {
+				name: "dialogTypeField"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+					"JavaCodeGenerator.typeParameters": "DialogType"
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "dialogTypeChanged", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 4"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "showControlButtonsCheckBox"
+				"text": "Show Control Buttons"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "showControlButtons", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 2 4"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "showShortcutsCheckBox"
+				"text": "Show Shortcuts"
+				"selected": true
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "showShortcuts", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 2 4"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "showAccessoryCheckBox"
+				"text": "Show Accessory"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "showAccessory", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 2 4"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "fileSelectionModeLabel"
+				"text": "File Selection Mode:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 5"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.testing.FlatTestEnumSelector" ) {
+				name: "fileSelectionModeField"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+					"JavaCodeGenerator.typeParameters": "FileSelectionMode"
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "fileSelectionModeChanged", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 5"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "multiSelectionCheckBox"
+				"text": "Multi Selection"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "multiSelection", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 2 5"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "fileHidingCheckBox"
+				"text": "File Hiding"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "fileHiding", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 2 5"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "dragCheckBox"
+				"text": "Drag"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "drag", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 2 5"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "filtersLabel"
+				"text": "Filters:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 6"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "filterAllFilesCheckBox"
+				"text": "All Files"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "filterChanged", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 6 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "filterTextFilesCheckBox"
+				"text": "Text Files"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "filterChanged", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 6 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "filterImagesCheckBox"
+				"text": "Images"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "filterChanged", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 6 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "filterLongDescCheckBox"
+				"text": "Long description"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "filterChanged", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 6 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "filterExtraLongDescCheckBox"
+				"text": "Extra Long description"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "filterChanged", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 6 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JButton" ) {
+				name: "printShortcutFilesButton"
+				"text": "Print Shortcut Files"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "printShortcutFiles", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 7 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JButton" ) {
+				name: "printComboBoxFilesButton"
+				"text": "Print ComboBox Files"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "printComboBoxFiles", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 7 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JButton" ) {
+				name: "printRootsButton"
+				"text": "Print Roots"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "printRoots", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 7 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "localesLabel"
+				"text": "Locales:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 8"
+			} )
+			add( new FormComponent( "com.formdev.flatlaf.testing.FlatTestEnumSelector" ) {
+				name: "localesField"
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+					"JavaCodeGenerator.typeParameters": "Locales"
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "localesChanged", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 8 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label1"
+				"text": "icons:"
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 9"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label2"
+				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileView.directoryIcon" )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 9 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label3"
+				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileView.fileIcon" )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 9 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label4"
+				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileView.computerIcon" )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 9 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label5"
+				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileView.hardDriveIcon" )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 9 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label6"
+				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileView.floppyDriveIcon" )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 9 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label7"
+				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileChooser.newFolderIcon" )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 9 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label8"
+				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileChooser.upFolderIcon" )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 9 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label9"
+				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileChooser.homeFolderIcon" )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 9 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label10"
+				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileChooser.detailsViewIcon" )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 9 2 1"
+			} )
+			add( new FormComponent( "javax.swing.JLabel" ) {
+				name: "label11"
+				"icon": new com.jformdesigner.model.SwingIcon( 2, "FileChooser.listViewIcon" )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 1 9 2 1"
+			} )
+		}, new FormLayoutConstraints( null ) {
+			"location": new java.awt.Point( 0, 0 )
+			"size": new java.awt.Dimension( 715, 660 )
+		} )
+	}
+}

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatMacOSTest.java

@@ -0,0 +1,291 @@
+/*
+ * Copyright 2024 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.testing;
+
+import java.awt.*;
+import javax.swing.*;
+import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.ui.FlatNativeMacLibrary;
+import com.formdev.flatlaf.util.SystemInfo;
+import net.miginfocom.swing.*;
+
+/**
+ * @author Karl Tauber
+ */
+public class FlatMacOSTest
+	extends FlatTestPanel
+{
+	public static void main( String[] args ) {
+		SwingUtilities.invokeLater( () -> {
+			FlatTestFrame frame = FlatTestFrame.create( args, FlatMacOSTest.class.getSimpleName() );
+			frame.applyComponentOrientationToFrame = true;
+
+			JRootPane rootPane = frame.getRootPane();
+			rootPane.putClientProperty( "apple.awt.fullWindowContent", true );
+			rootPane.putClientProperty( "apple.awt.transparentTitleBar", true );
+			rootPane.putClientProperty( "apple.awt.windowTitleVisible", false );
+
+			frame.showFrame( FlatMacOSTest::new );
+		} );
+	}
+
+	FlatMacOSTest() {
+		initComponents();
+
+		if( SystemInfo.isMacFullWindowContentSupported ) {
+			fullWindowContentHint.setVisible( false );
+			transparentTitleBarHint.setVisible( false );
+		}
+		if( SystemInfo.isJava_17_orLater ) {
+			windowTitleVisibleHint.setVisible( false );
+			buttonsSpacingHint.setVisible( false );
+		}
+
+		placeholderPanel.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_PLACEHOLDER, "mac zeroInFullScreen" );
+		UIManager.put( "FlatLaf.debug.panel.showPlaceholders", true );
+	}
+
+	@Override
+	public void addNotify() {
+		super.addNotify();
+
+		JRootPane rootPane = getRootPane();
+		fullWindowContentCheckBox.setSelected( FlatClientProperties.clientPropertyBoolean( rootPane, "apple.awt.fullWindowContent", false ) );
+		transparentTitleBarCheckBox.setSelected( FlatClientProperties.clientPropertyBoolean( rootPane, "apple.awt.transparentTitleBar", false ) );
+		windowTitleVisibleCheckBox.setSelected( FlatClientProperties.clientPropertyBoolean( rootPane, "apple.awt.windowTitleVisible", true ) );
+
+		rootPane.addPropertyChangeListener( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_BOUNDS, e -> {
+			Rectangle bounds = (Rectangle) e.getNewValue();
+			fullWindowContentButtonsBoundsField.setText( bounds2string( bounds ) );
+		} );
+		updateNativeButtonBounds();
+	}
+
+	@Override
+	public void updateUI() {
+		super.updateUI();
+
+		if( nativeButtonsBoundsField != null )
+			updateNativeButtonBounds();
+	}
+
+	private void fullWindowContentChanged() {
+		getRootPane().putClientProperty( "apple.awt.fullWindowContent", fullWindowContentCheckBox.isSelected() );
+	}
+
+	private void transparentTitleBarChanged() {
+		getRootPane().putClientProperty( "apple.awt.transparentTitleBar", transparentTitleBarCheckBox.isSelected() );
+	}
+
+	private void windowTitleVisibleChanged() {
+		getRootPane().putClientProperty( "apple.awt.windowTitleVisible", windowTitleVisibleCheckBox.isSelected() );
+	}
+
+	private void buttonsSpacingChanged() {
+		String buttonsSpacing = null;
+		if( buttonsSpacingMediumRadioButton.isSelected() )
+			buttonsSpacing = FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING_MEDIUM;
+		else if( buttonsSpacingLargeRadioButton.isSelected() )
+			buttonsSpacing = FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING_LARGE;
+
+		getRootPane().putClientProperty( FlatClientProperties.MACOS_WINDOW_BUTTONS_SPACING, buttonsSpacing );
+
+		updateNativeButtonBounds();
+	}
+
+	private void updateNativeButtonBounds() {
+		if( !FlatNativeMacLibrary.isLoaded() )
+			return;
+
+		Window window = SwingUtilities.windowForComponent( this );
+		Rectangle bounds = FlatNativeMacLibrary.getWindowButtonsBounds( window );
+		nativeButtonsBoundsField.setText( bounds2string( bounds ) );
+	}
+
+	private String bounds2string( Rectangle bounds ) {
+		return (bounds != null)
+			? bounds.width + ", " + bounds.height + "   @ " + bounds.x + ", " + bounds.y
+			: "null";
+	}
+
+	private void toggleFullScreen() {
+		if( !FlatNativeMacLibrary.isLoaded() )
+			return;
+
+		Window window = SwingUtilities.windowForComponent( this );
+		FlatNativeMacLibrary.toggleWindowFullScreen( window );
+	}
+
+	private void initComponents() {
+		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
+		JPanel panel1 = new JPanel();
+		placeholderPanel = new JPanel();
+		JPanel panel2 = new JPanel();
+		fullWindowContentCheckBox = new JCheckBox();
+		fullWindowContentHint = new JLabel();
+		transparentTitleBarCheckBox = new JCheckBox();
+		transparentTitleBarHint = new JLabel();
+		windowTitleVisibleCheckBox = new JCheckBox();
+		windowTitleVisibleHint = new JLabel();
+		JLabel buttonsSpacingLabel = new JLabel();
+		buttonsSpacingDefaultRadioButton = new JRadioButton();
+		buttonsSpacingMediumRadioButton = new JRadioButton();
+		buttonsSpacingLargeRadioButton = new JRadioButton();
+		buttonsSpacingHint = new JLabel();
+		JLabel fullWindowContentButtonsBoundsLabel = new JLabel();
+		fullWindowContentButtonsBoundsField = new JLabel();
+		JLabel nativeButtonsBoundsLabel = new JLabel();
+		nativeButtonsBoundsField = new JLabel();
+		JButton toggleFullScreenButton = new JButton();
+
+		//======== this ========
+		setLayout(new BorderLayout());
+
+		//======== panel1 ========
+		{
+			panel1.setLayout(new BorderLayout());
+
+			//======== placeholderPanel ========
+			{
+				placeholderPanel.setBackground(Color.green);
+				placeholderPanel.setLayout(new FlowLayout());
+			}
+			panel1.add(placeholderPanel, BorderLayout.WEST);
+		}
+		add(panel1, BorderLayout.PAGE_START);
+
+		//======== panel2 ========
+		{
+			panel2.setLayout(new MigLayout(
+				"ltr,insets dialog,hidemode 3",
+				// columns
+				"[left]" +
+				"[left]" +
+				"[left]" +
+				"[left]para" +
+				"[fill]",
+				// rows
+				"[]" +
+				"[]" +
+				"[]" +
+				"[fill]" +
+				"[]" +
+				"[]para" +
+				"[]"));
+
+			//---- fullWindowContentCheckBox ----
+			fullWindowContentCheckBox.setText("fullWindowContent");
+			fullWindowContentCheckBox.addActionListener(e -> fullWindowContentChanged());
+			panel2.add(fullWindowContentCheckBox, "cell 0 0");
+
+			//---- fullWindowContentHint ----
+			fullWindowContentHint.setText("requires Java 12, 11.0.8 or 8u292");
+			fullWindowContentHint.setForeground(Color.red);
+			panel2.add(fullWindowContentHint, "cell 4 0");
+
+			//---- transparentTitleBarCheckBox ----
+			transparentTitleBarCheckBox.setText("transparentTitleBar");
+			transparentTitleBarCheckBox.addActionListener(e -> transparentTitleBarChanged());
+			panel2.add(transparentTitleBarCheckBox, "cell 0 1");
+
+			//---- transparentTitleBarHint ----
+			transparentTitleBarHint.setText("requires Java 12, 11.0.8 or 8u292");
+			transparentTitleBarHint.setForeground(Color.red);
+			panel2.add(transparentTitleBarHint, "cell 4 1");
+
+			//---- windowTitleVisibleCheckBox ----
+			windowTitleVisibleCheckBox.setText("windowTitleVisible");
+			windowTitleVisibleCheckBox.addActionListener(e -> windowTitleVisibleChanged());
+			panel2.add(windowTitleVisibleCheckBox, "cell 0 2");
+
+			//---- windowTitleVisibleHint ----
+			windowTitleVisibleHint.setText("requires Java 17");
+			windowTitleVisibleHint.setForeground(Color.red);
+			panel2.add(windowTitleVisibleHint, "cell 4 2");
+
+			//---- buttonsSpacingLabel ----
+			buttonsSpacingLabel.setText("Buttons spacing:");
+			panel2.add(buttonsSpacingLabel, "cell 0 3");
+
+			//---- buttonsSpacingDefaultRadioButton ----
+			buttonsSpacingDefaultRadioButton.setText("Default");
+			buttonsSpacingDefaultRadioButton.setSelected(true);
+			buttonsSpacingDefaultRadioButton.addActionListener(e -> buttonsSpacingChanged());
+			panel2.add(buttonsSpacingDefaultRadioButton, "cell 1 3");
+
+			//---- buttonsSpacingMediumRadioButton ----
+			buttonsSpacingMediumRadioButton.setText("Medium");
+			buttonsSpacingMediumRadioButton.addActionListener(e -> buttonsSpacingChanged());
+			panel2.add(buttonsSpacingMediumRadioButton, "cell 2 3");
+
+			//---- buttonsSpacingLargeRadioButton ----
+			buttonsSpacingLargeRadioButton.setText("Large");
+			buttonsSpacingLargeRadioButton.addActionListener(e -> buttonsSpacingChanged());
+			panel2.add(buttonsSpacingLargeRadioButton, "cell 3 3");
+
+			//---- buttonsSpacingHint ----
+			buttonsSpacingHint.setText("requires Java 17");
+			buttonsSpacingHint.setForeground(Color.red);
+			panel2.add(buttonsSpacingHint, "cell 4 3");
+
+			//---- fullWindowContentButtonsBoundsLabel ----
+			fullWindowContentButtonsBoundsLabel.setText("Buttons bounds:");
+			panel2.add(fullWindowContentButtonsBoundsLabel, "cell 0 4");
+
+			//---- fullWindowContentButtonsBoundsField ----
+			fullWindowContentButtonsBoundsField.setText("null");
+			panel2.add(fullWindowContentButtonsBoundsField, "cell 1 4 3 1");
+
+			//---- nativeButtonsBoundsLabel ----
+			nativeButtonsBoundsLabel.setText("Native buttons bounds:");
+			panel2.add(nativeButtonsBoundsLabel, "cell 0 5");
+
+			//---- nativeButtonsBoundsField ----
+			nativeButtonsBoundsField.setText("null");
+			panel2.add(nativeButtonsBoundsField, "cell 1 5 3 1");
+
+			//---- toggleFullScreenButton ----
+			toggleFullScreenButton.setText("Toggle Full Screen");
+			toggleFullScreenButton.addActionListener(e -> toggleFullScreen());
+			panel2.add(toggleFullScreenButton, "cell 0 6");
+		}
+		add(panel2, BorderLayout.CENTER);
+
+		//---- buttonsSpacingButtonGroup ----
+		ButtonGroup buttonsSpacingButtonGroup = new ButtonGroup();
+		buttonsSpacingButtonGroup.add(buttonsSpacingDefaultRadioButton);
+		buttonsSpacingButtonGroup.add(buttonsSpacingMediumRadioButton);
+		buttonsSpacingButtonGroup.add(buttonsSpacingLargeRadioButton);
+		// JFormDesigner - End of component initialization  //GEN-END:initComponents
+	}
+
+	// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
+	private JPanel placeholderPanel;
+	private JCheckBox fullWindowContentCheckBox;
+	private JLabel fullWindowContentHint;
+	private JCheckBox transparentTitleBarCheckBox;
+	private JLabel transparentTitleBarHint;
+	private JCheckBox windowTitleVisibleCheckBox;
+	private JLabel windowTitleVisibleHint;
+	private JRadioButton buttonsSpacingDefaultRadioButton;
+	private JRadioButton buttonsSpacingMediumRadioButton;
+	private JRadioButton buttonsSpacingLargeRadioButton;
+	private JLabel buttonsSpacingHint;
+	private JLabel fullWindowContentButtonsBoundsField;
+	private JLabel nativeButtonsBoundsField;
+	// JFormDesigner - End of variables declaration  //GEN-END:variables
+}

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatMacOSTest.jfd

@@ -0,0 +1,191 @@
+JFDML JFormDesigner: "8.2.1.0.348" Java: "21.0.1" encoding: "UTF-8"
+
+new FormModel {
+	contentType: "form/swing"
+	root: new FormRoot {
+		auxiliary() {
+			"JavaCodeGenerator.defaultVariableLocal": true
+		}
+		add( new FormContainer( "com.formdev.flatlaf.testing.FlatTestPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+			name: "this"
+			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.BorderLayout ) ) {
+				name: "panel1"
+				add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class java.awt.FlowLayout ) ) {
+					name: "placeholderPanel"
+					"background": sfield java.awt.Color green
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+				}, new FormLayoutConstraints( class java.lang.String ) {
+					"value": "West"
+				} )
+			}, new FormLayoutConstraints( class java.lang.String ) {
+				"value": "First"
+			} )
+			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
+				"$layoutConstraints": "ltr,insets dialog,hidemode 3"
+				"$columnConstraints": "[left][left][left][left]para[fill]"
+				"$rowConstraints": "[][][][fill][][]para[]"
+			} ) {
+				name: "panel2"
+				add( new FormComponent( "javax.swing.JCheckBox" ) {
+					name: "fullWindowContentCheckBox"
+					"text": "fullWindowContent"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "fullWindowContentChanged", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 0"
+				} )
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "fullWindowContentHint"
+					"text": "requires Java 12, 11.0.8 or 8u292"
+					"foreground": sfield java.awt.Color red
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 4 0"
+				} )
+				add( new FormComponent( "javax.swing.JCheckBox" ) {
+					name: "transparentTitleBarCheckBox"
+					"text": "transparentTitleBar"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "transparentTitleBarChanged", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 1"
+				} )
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "transparentTitleBarHint"
+					"text": "requires Java 12, 11.0.8 or 8u292"
+					"foreground": sfield java.awt.Color red
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 4 1"
+				} )
+				add( new FormComponent( "javax.swing.JCheckBox" ) {
+					name: "windowTitleVisibleCheckBox"
+					"text": "windowTitleVisible"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "windowTitleVisibleChanged", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 2"
+				} )
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "windowTitleVisibleHint"
+					"text": "requires Java 17"
+					"foreground": sfield java.awt.Color red
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 4 2"
+				} )
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "buttonsSpacingLabel"
+					"text": "Buttons spacing:"
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 3"
+				} )
+				add( new FormComponent( "javax.swing.JRadioButton" ) {
+					name: "buttonsSpacingDefaultRadioButton"
+					"text": "Default"
+					"$buttonGroup": new FormReference( "buttonsSpacingButtonGroup" )
+					"selected": true
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "buttonsSpacingChanged", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 1 3"
+				} )
+				add( new FormComponent( "javax.swing.JRadioButton" ) {
+					name: "buttonsSpacingMediumRadioButton"
+					"text": "Medium"
+					"$buttonGroup": new FormReference( "buttonsSpacingButtonGroup" )
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "buttonsSpacingChanged", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 2 3"
+				} )
+				add( new FormComponent( "javax.swing.JRadioButton" ) {
+					name: "buttonsSpacingLargeRadioButton"
+					"text": "Large"
+					"$buttonGroup": new FormReference( "buttonsSpacingButtonGroup" )
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "buttonsSpacingChanged", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 3 3"
+				} )
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "buttonsSpacingHint"
+					"text": "requires Java 17"
+					"foreground": sfield java.awt.Color red
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 4 3"
+				} )
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "fullWindowContentButtonsBoundsLabel"
+					"text": "Buttons bounds:"
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 4"
+				} )
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "fullWindowContentButtonsBoundsField"
+					"text": "null"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 1 4 3 1"
+				} )
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "nativeButtonsBoundsLabel"
+					"text": "Native buttons bounds:"
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 5"
+				} )
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "nativeButtonsBoundsField"
+					"text": "null"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 1 5 3 1"
+				} )
+				add( new FormComponent( "javax.swing.JButton" ) {
+					name: "toggleFullScreenButton"
+					"text": "Toggle Full Screen"
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "toggleFullScreen", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 6"
+				} )
+			}, new FormLayoutConstraints( class java.lang.String ) {
+				"value": "Center"
+			} )
+		}, new FormLayoutConstraints( null ) {
+			"location": new java.awt.Point( 0, 0 )
+			"size": new java.awt.Dimension( 725, 350 )
+		} )
+		add( new FormNonVisual( "javax.swing.ButtonGroup" ) {
+			name: "buttonsSpacingButtonGroup"
+		}, new FormLayoutConstraints( null ) {
+			"location": new java.awt.Point( 0, 360 )
+		} )
+	}
+}

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatTestPanel.java

@@ -32,8 +32,10 @@ public class FlatTestPanel
 		int width = getWidth();
 		int height = getHeight();
 
-		g.setColor( super.getBackground() );
+		if( isOpaque() ) {
-		g.fillRect( 0, 0, width, height );
+			g.setColor( super.getBackground() );
+			g.fillRect( 0, 0, width, height );
+		}
 
 		if( isPaintBackgroundPattern() ) {
 			g.setColor( Color.magenta );

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatWindowDecorationsTest.java

@@ -41,6 +41,9 @@ import net.miginfocom.swing.*;
 public class FlatWindowDecorationsTest
 	extends FlatTestPanel
 {
+	// same as in FlatTitlePane
+	private static final String KEY_DEBUG_SHOW_RECTANGLES = "FlatLaf.debug.titlebar.showRectangles";
+
 	public static void main( String[] args ) {
 		SwingUtilities.invokeLater( () -> {
 			if( SystemInfo.isLinux ) {
@@ -51,7 +54,7 @@ public class FlatWindowDecorationsTest
 
 			FlatTestFrame frame = FlatTestFrame.create( args, "FlatWindowDecorationsTest" );
 			frame.applyComponentOrientationToFrame = true;
-			UIManager.put( "FlatLaf.debug.titlebar.showRectangles", true );
+			UIManager.put( KEY_DEBUG_SHOW_RECTANGLES, true );
 
 			Class<?> cls = FlatWindowDecorationsTest.class;
 			List<Image> images = Arrays.asList(
@@ -76,6 +79,14 @@ public class FlatWindowDecorationsTest
 		initComponents();
 	}
 
+	@Override
+	public void updateUI() {
+		super.updateUI();
+
+		if( translucentWindowBackgroundCheckBox != null )
+			translucentWindowBackgroundChanged();
+	}
+
 	@Override
 	public void addNotify() {
 		super.addNotify();
@@ -109,6 +120,14 @@ public class FlatWindowDecorationsTest
 			rootPane.addPropertyChangeListener( "windowDecorationStyle", e -> {
 				updateDecorationStyleRadioButtons( rootPane );
 			} );
+			rootPane.addPropertyChangeListener( FlatClientProperties.FULL_WINDOW_CONTENT_BUTTONS_BOUNDS, e -> {
+				Rectangle bounds = (Rectangle) e.getNewValue();
+				if( bounds != null ) {
+					fullWindowContentButtonsBoundsField.setText( bounds.width + ", " + bounds.height
+						+ "   @ " + bounds.x + ", " + bounds.y );
+				} else
+					fullWindowContentButtonsBoundsField.setText( "null" );
+			} );
 		}
 	}
 
@@ -237,6 +256,27 @@ public class FlatWindowDecorationsTest
 		}
 	}
 
+	private void translucentWindowBackgroundChanged() {
+		boolean selected = translucentWindowBackgroundCheckBox.isSelected();
+		if( selected && !undecoratedCheckBox.isSelected() ) {
+			undecoratedCheckBox.setSelected( true );
+			undecoratedChanged();
+		}
+		undecoratedCheckBox.setEnabled( !selected );
+
+		Color background = selected
+			? new Color( 100, 0, 0, 100 )
+			: UIManager.getColor( "control" );
+
+		Window window = SwingUtilities.windowForComponent( this );
+		window.setBackground( background );
+
+		for( Component c = this; c != null; c = c.getParent() ) {
+			if( c instanceof JComponent )
+				LookAndFeel.installProperty( (JComponent) c, "opaque", !selected );
+		}
+	}
+
 	private void addMenu() {
 		JMenu menu = new JMenu( "Hello" );
 		menu.add( new JMenuItem( "world" ) );
@@ -280,12 +320,21 @@ debug*/
 		JLabel caption = new JLabel( "Caption" );
 		caption.setBackground( Color.green );
 		caption.setOpaque( true );
-		caption.putClientProperty( FlatClientProperties.COMPONENT_TITLE_BAR_CAPTION, true );
 
 		menuBar.add( caption );
 		menuBar.revalidate();
 	}
 
+	private void addTextField() {
+		JTextField textField = new JTextField( "text", 10 );
+
+		JPanel panel = new JPanel( new GridBagLayout() );
+		panel.add( textField, new GridBagConstraints() );
+
+		menuBar.add( panel );
+		menuBar.revalidate();
+	}
+
 	private void removeMenu() {
 		int menuCount = menuBar.getMenuCount();
 		if( menuCount <= 0 )
@@ -486,13 +535,31 @@ debug*/
 			rootPane.putClientProperty( FlatClientProperties.TITLE_BAR_SHOW_CLOSE, showCloseCheckBox.isSelected() ? null : false );
 	}
 
+	private void fullWindowContentChanged() {
+		JRootPane rootPane = getWindowRootPane();
+		if( rootPane != null ) {
+			boolean selected = fullWindowContentCheckBox.isSelected();
+			rootPane.putClientProperty( FlatClientProperties.FULL_WINDOW_CONTENT, selected ? true : null );
+
+			showIconCheckBox.setEnabled( !selected );
+			showTitleCheckBox.setEnabled( !selected );
+		}
+	}
+
 	private JRootPane getWindowRootPane() {
 		Window window = SwingUtilities.windowForComponent( this );
-		if( window instanceof JFrame )
+		return (window instanceof RootPaneContainer)
-			return ((JFrame)window).getRootPane();
+			? ((RootPaneContainer)window).getRootPane()
-		else if( window instanceof JDialog )
+			: null;
-			return ((JDialog)window).getRootPane();
+	}
-		return null;
+
+	private void showRectangles() {
+		JRootPane rootPane = getWindowRootPane();
+		if( rootPane != null ) {
+			UIManager.put( KEY_DEBUG_SHOW_RECTANGLES, showRectanglesCheckBox.isSelected() );
+			rootPane.revalidate();
+			rootPane.repaint();
+		}
 	}
 
 	private void initComponents() {
@@ -509,6 +576,9 @@ debug*/
 		showIconifyCheckBox = new JCheckBox();
 		showMaximizeCheckBox = new JCheckBox();
 		showCloseCheckBox = new JCheckBox();
+		fullWindowContentCheckBox = new JCheckBox();
+		JLabel fullWindowContentButtonsBoundsLabel = new JLabel();
+		fullWindowContentButtonsBoundsField = new JLabel();
 		JPanel panel6 = new JPanel();
 		menuBarCheckBox = new JCheckBox();
 		menuBarEmbeddedCheckBox = new JCheckBox();
@@ -519,6 +589,7 @@ debug*/
 		addMenuButton = new JButton();
 		addGlueButton = new JButton();
 		addCaptionButton = new JButton();
+		addTextFieldButton = new JButton();
 		removeMenuButton = new JButton();
 		changeMenuButton = new JButton();
 		changeTitleButton = new JButton();
@@ -543,11 +614,13 @@ debug*/
 		colorizeTitleBarCheckBox = new JCheckBox();
 		colorizeMenuBarCheckBox = new JCheckBox();
 		colorizeMenusCheckBox = new JCheckBox();
+		translucentWindowBackgroundCheckBox = new JCheckBox();
 		JButton openDialogButton = new JButton();
 		JButton openFrameButton = new JButton();
 		typeNormalRadioButton = new JRadioButton();
 		typeUtilityRadioButton = new JRadioButton();
 		typeSmallRadioButton = new JRadioButton();
+		showRectanglesCheckBox = new JCheckBox();
 		menuBar = new JMenuBar();
 		JMenu fileMenu = new JMenu();
 		JMenuItem newMenuItem = new JMenuItem();
@@ -586,6 +659,7 @@ debug*/
 			// rows
 			"[fill]" +
 			"[fill]" +
+			"[]" +
 			"[]"));
 
 		//======== panel7 ========
@@ -643,6 +717,8 @@ debug*/
 				"[]" +
 				"[]" +
 				"[]" +
+				"[]rel" +
+				"[]rel" +
 				"[]"));
 
 			//---- showIconCheckBox ----
@@ -673,6 +749,19 @@ debug*/
 			showCloseCheckBox.setSelected(true);
 			showCloseCheckBox.addActionListener(e -> showCloseChanged());
 			panel4.add(showCloseCheckBox, "cell 0 4");
+
+			//---- fullWindowContentCheckBox ----
+			fullWindowContentCheckBox.setText("full window content");
+			fullWindowContentCheckBox.addActionListener(e -> fullWindowContentChanged());
+			panel4.add(fullWindowContentCheckBox, "cell 0 5");
+
+			//---- fullWindowContentButtonsBoundsLabel ----
+			fullWindowContentButtonsBoundsLabel.setText("Buttons bounds:");
+			panel4.add(fullWindowContentButtonsBoundsLabel, "cell 0 6");
+
+			//---- fullWindowContentButtonsBoundsField ----
+			fullWindowContentButtonsBoundsField.setText("null");
+			panel4.add(fullWindowContentButtonsBoundsField, "cell 0 6");
 		}
 		add(panel4, "cell 1 0");
 
@@ -731,6 +820,7 @@ debug*/
 				"[]" +
 				"[]" +
 				"[]" +
+				"[]" +
 				"[]unrel" +
 				"[]"));
 
@@ -749,20 +839,25 @@ debug*/
 			addCaptionButton.addActionListener(e -> addCaption());
 			panel3.add(addCaptionButton, "cell 0 2");
 
+			//---- addTextFieldButton ----
+			addTextFieldButton.setText("Add text field");
+			addTextFieldButton.addActionListener(e -> addTextField());
+			panel3.add(addTextFieldButton, "cell 0 3");
+
 			//---- removeMenuButton ----
 			removeMenuButton.setText("Remove menu");
 			removeMenuButton.addActionListener(e -> removeMenu());
-			panel3.add(removeMenuButton, "cell 0 3");
+			panel3.add(removeMenuButton, "cell 0 4");
 
 			//---- changeMenuButton ----
 			changeMenuButton.setText("Change menu");
 			changeMenuButton.addActionListener(e -> changeMenu());
-			panel3.add(changeMenuButton, "cell 0 4");
+			panel3.add(changeMenuButton, "cell 0 5");
 
 			//---- changeTitleButton ----
 			changeTitleButton.setText("Change title");
 			changeTitleButton.addActionListener(e -> changeTitle());
-			panel3.add(changeTitleButton, "cell 0 5");
+			panel3.add(changeTitleButton, "cell 0 6");
 		}
 		add(panel3, "cell 3 0 1 2,aligny top,growy 0");
 
@@ -885,6 +980,7 @@ debug*/
 				"[]" +
 				"[]" +
 				"[]" +
+				"[]para" +
 				"[]"));
 
 			//---- unifiedBackgroundCheckBox ----
@@ -906,6 +1002,11 @@ debug*/
 			colorizeMenusCheckBox.setText("colorize menus");
 			colorizeMenusCheckBox.addActionListener(e -> colorizeMenus());
 			panel5.add(colorizeMenusCheckBox, "cell 0 3");
+
+			//---- translucentWindowBackgroundCheckBox ----
+			translucentWindowBackgroundCheckBox.setText("translucent window background");
+			translucentWindowBackgroundCheckBox.addActionListener(e -> translucentWindowBackgroundChanged());
+			panel5.add(translucentWindowBackgroundCheckBox, "cell 0 4");
 		}
 		add(panel5, "cell 2 1");
 
@@ -933,6 +1034,12 @@ debug*/
 		typeSmallRadioButton.setText("Small");
 		add(typeSmallRadioButton, "cell 0 2 3 1");
 
+		//---- showRectanglesCheckBox ----
+		showRectanglesCheckBox.setText("Show debug title bar rectangles");
+		showRectanglesCheckBox.setSelected(true);
+		showRectanglesCheckBox.addActionListener(e -> showRectangles());
+		add(showRectanglesCheckBox, "cell 0 3");
+
 		//======== menuBar ========
 		{
 
@@ -1140,6 +1247,8 @@ debug*/
 	private JCheckBox showIconifyCheckBox;
 	private JCheckBox showMaximizeCheckBox;
 	private JCheckBox showCloseCheckBox;
+	private JCheckBox fullWindowContentCheckBox;
+	private JLabel fullWindowContentButtonsBoundsField;
 	private JCheckBox menuBarCheckBox;
 	private JCheckBox menuBarEmbeddedCheckBox;
 	private JCheckBox menuBarVisibleCheckBox;
@@ -1148,6 +1257,7 @@ debug*/
 	private JButton addMenuButton;
 	private JButton addGlueButton;
 	private JButton addCaptionButton;
+	private JButton addTextFieldButton;
 	private JButton removeMenuButton;
 	private JButton changeMenuButton;
 	private JButton changeTitleButton;
@@ -1169,9 +1279,11 @@ debug*/
 	private JCheckBox colorizeTitleBarCheckBox;
 	private JCheckBox colorizeMenuBarCheckBox;
 	private JCheckBox colorizeMenusCheckBox;
+	private JCheckBox translucentWindowBackgroundCheckBox;
 	private JRadioButton typeNormalRadioButton;
 	private JRadioButton typeUtilityRadioButton;
 	private JRadioButton typeSmallRadioButton;
+	private JCheckBox showRectanglesCheckBox;
 	private JMenuBar menuBar;
 	// JFormDesigner - End of variables declaration  //GEN-END:variables
 }

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatWindowDecorationsTest.jfd

@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "8.1.0.0.283" Java: "19.0.2" encoding: "UTF-8"
+JFDML JFormDesigner: "8.2.1.0.348" Java: "21.0.1" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
@@ -9,7 +9,7 @@ new FormModel {
 		add( new FormContainer( "com.formdev.flatlaf.testing.FlatTestPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
 			"$layoutConstraints": "ltr,insets dialog,hidemode 3"
 			"$columnConstraints": "[left][fill][fill][fill]"
-			"$rowConstraints": "[fill][fill][]"
+			"$rowConstraints": "[fill][fill][][]"
 		} ) {
 			name: "this"
 			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
@@ -77,7 +77,7 @@ new FormModel {
 			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
 				"$layoutConstraints": "ltr,hidemode 3,gap 0 0"
 				"$columnConstraints": "[grow,left]"
-				"$rowConstraints": "[][][][][]"
+				"$rowConstraints": "[][][][][]rel[]rel[]"
 			} ) {
 				name: "panel4"
 				"border": new javax.swing.border.TitledBorder( "Title Bar" )
@@ -135,6 +135,31 @@ new FormModel {
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 					"value": "cell 0 4"
 				} )
+				add( new FormComponent( "javax.swing.JCheckBox" ) {
+					name: "fullWindowContentCheckBox"
+					"text": "full window content"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "fullWindowContentChanged", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 5"
+				} )
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "fullWindowContentButtonsBoundsLabel"
+					"text": "Buttons bounds:"
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 6"
+				} )
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "fullWindowContentButtonsBoundsField"
+					"text": "null"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 6"
+				} )
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 1 0"
 			} )
@@ -204,7 +229,7 @@ new FormModel {
 			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
 				"$layoutConstraints": "hidemode 3"
 				"$columnConstraints": "[fill]"
-				"$rowConstraints": "[][][][][]unrel[]"
+				"$rowConstraints": "[][][][][][]unrel[]"
 			} ) {
 				name: "panel3"
 				add( new FormComponent( "javax.swing.JButton" ) {
@@ -237,6 +262,16 @@ new FormModel {
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 					"value": "cell 0 2"
 				} )
+				add( new FormComponent( "javax.swing.JButton" ) {
+					name: "addTextFieldButton"
+					"text": "Add text field"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "addTextField", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 3"
+				} )
 				add( new FormComponent( "javax.swing.JButton" ) {
 					name: "removeMenuButton"
 					"text": "Remove menu"
@@ -245,7 +280,7 @@ new FormModel {
 					}
 					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "removeMenu", false ) )
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 0 3"
+					"value": "cell 0 4"
 				} )
 				add( new FormComponent( "javax.swing.JButton" ) {
 					name: "changeMenuButton"
@@ -255,7 +290,7 @@ new FormModel {
 					}
 					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "changeMenu", false ) )
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 0 4"
+					"value": "cell 0 5"
 				} )
 				add( new FormComponent( "javax.swing.JButton" ) {
 					name: "changeTitleButton"
@@ -265,7 +300,7 @@ new FormModel {
 					}
 					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "changeTitle", false ) )
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 0 5"
+					"value": "cell 0 6"
 				} )
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 3 0 1 2,aligny top,growy 0"
@@ -449,7 +484,7 @@ new FormModel {
 			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
 				"$layoutConstraints": "ltr,hidemode 3,gap 0 0"
 				"$columnConstraints": "[left]"
-				"$rowConstraints": "[][][][]"
+				"$rowConstraints": "[][][][]para[]"
 			} ) {
 				name: "panel5"
 				"border": new javax.swing.border.TitledBorder( "Color" )
@@ -493,6 +528,16 @@ new FormModel {
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 					"value": "cell 0 3"
 				} )
+				add( new FormComponent( "javax.swing.JCheckBox" ) {
+					name: "translucentWindowBackgroundCheckBox"
+					"text": "translucent window background"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "translucentWindowBackgroundChanged", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 4"
+				} )
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 2 1"
 			} )
@@ -542,6 +587,17 @@ new FormModel {
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 2 3 1"
 			} )
+			add( new FormComponent( "javax.swing.JCheckBox" ) {
+				name: "showRectanglesCheckBox"
+				"text": "Show debug title bar rectangles"
+				"selected": true
+				auxiliary() {
+					"JavaCodeGenerator.variableLocal": false
+				}
+				addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "showRectangles", false ) )
+			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+				"value": "cell 0 3"
+			} )
 		}, new FormLayoutConstraints( null ) {
 			"location": new java.awt.Point( 0, 0 )
 			"size": new java.awt.Dimension( 960, 495 )

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/uidefaults/UIDefaultsDump.java

@@ -119,10 +119,9 @@ public class UIDefaultsDump
 //
 //		dump( "com.jgoodies.looks.plastic.PlasticLookAndFeel", dir, false );
 //		dump( "com.jgoodies.looks.windows.WindowsLookAndFeel", dir, false );
-//		dump( "com.alee.laf.WebLookAndFeel", dir, false );
 //		try {
-//			EventQueue.invokeAndWait( () -> {
+//			SwingUtilities.invokeAndWait( () -> {
-//				dump( "org.pushingpixels.substance.api.skin.SubstanceGraphiteAquaLookAndFeel", dir, false );
+//				dump( "org.pushingpixels.radiance.theming.api.skin.RadianceGraphiteAquaLookAndFeel", dir, false );
 //			} );
 //		} catch( Exception ex ) {
 //			// TODO Auto-generated catch block
@@ -673,7 +672,7 @@ public class UIDefaultsDump
 
 			switch( borderClassName ) {
 				case "com.apple.laf.AquaToolBarUI$ToolBarBorder":
-				case "org.pushingpixels.substance.internal.utils.border.SubstanceToolBarBorder":
+				case "org.pushingpixels.radiance.theming.internal.utils.border.RadianceToolBarBorder":
 					c = new JToolBar();
 					break;
 

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/uidefaults/UIDefaultsKeysDump.java

@@ -68,6 +68,20 @@ public class UIDefaultsKeysDump
 		collectKeys( FlatDarculaLaf.class.getName(), keys );
 		collectKeys( FlatTestLaf.class.getName(), keys );
 
+		// remove unused keys (defined in BasicLookAndFeel)
+		keys.remove( "Button.textIconGap" );
+		keys.remove( "Button.textShiftOffset" );
+		keys.remove( "CheckBox.textIconGap" );
+		keys.remove( "CheckBox.textShiftOffset" );
+		keys.remove( "RadioButton.textIconGap" );
+		keys.remove( "RadioButton.textShiftOffset" );
+		keys.remove( "TabbedPane.contentOpaque" );
+		keys.remove( "TabbedPane.selectedTabPadInsets" );
+		keys.remove( "TabbedPane.shadow" );
+		keys.remove( "TabbedPane.tabsOverlapBorder" );
+		keys.remove( "ToggleButton.textIconGap" );
+		keys.remove( "ToggleButton.textShiftOffset" );
+
 		// write key file
 		try( Writer fileWriter = new BufferedWriter( new OutputStreamWriter(
 			new FileOutputStream( keysFile ), StandardCharsets.UTF_8 ) ) )

flatlaf-theme-editor/src/main/resources/com/formdev/flatlaf/themeeditor/FlatLafUIKeys.txt

@@ -64,8 +64,6 @@ Button.selectedForeground
 Button.shadow
 Button.startBackground
 Button.startBorderColor
-Button.textIconGap
-Button.textShiftOffset
 Button.toolbar.disabledSelectedBackground
 Button.toolbar.disabledSelectedForeground
 Button.toolbar.hoverBackground
@@ -149,8 +147,6 @@ CheckBox.icon[filled].selectedBorderColor
 CheckBox.icon[filled].selectedBorderWidth
 CheckBox.margin
 CheckBox.rollover
-CheckBox.textIconGap
-CheckBox.textShiftOffset
 CheckBoxMenuItem.acceleratorForeground
 CheckBoxMenuItem.acceleratorSelectionForeground
 CheckBoxMenuItem.arrowIcon
@@ -655,8 +651,6 @@ RadioButton.light
 RadioButton.margin
 RadioButton.rollover
 RadioButton.shadow
-RadioButton.textIconGap
-RadioButton.textShiftOffset
 RadioButtonMenuItem.acceleratorForeground
 RadioButtonMenuItem.acceleratorSelectionForeground
 RadioButtonMenuItem.arrowIcon
@@ -855,7 +849,6 @@ TabbedPane.closePressedBackground
 TabbedPane.closePressedForeground
 TabbedPane.closeSize
 TabbedPane.contentAreaColor
-TabbedPane.contentOpaque
 TabbedPane.contentSeparatorHeight
 TabbedPane.darkShadow
 TabbedPane.disabledForeground
@@ -881,9 +874,7 @@ TabbedPane.selectedBackground
 TabbedPane.selectedForeground
 TabbedPane.selectedInsets
 TabbedPane.selectedLabelShift
-TabbedPane.selectedTabPadInsets
 TabbedPane.selectionFollowsFocus
-TabbedPane.shadow
 TabbedPane.showTabSeparators
 TabbedPane.tabAlignment
 TabbedPane.tabArc
@@ -901,7 +892,6 @@ TabbedPane.tabSeparatorsFullHeight
 TabbedPane.tabType
 TabbedPane.tabWidthMode
 TabbedPane.tabsOpaque
-TabbedPane.tabsOverlapBorder
 TabbedPane.tabsPopupPolicy
 TabbedPane.textIconGap
 TabbedPane.underlineColor
@@ -920,6 +910,7 @@ Table.dropCellBackground
 Table.dropCellForeground
 Table.dropLineColor
 Table.dropLineShortColor
+Table.editorSelectAllOnStartEditing
 Table.focusCellBackground
 Table.focusCellForeground
 Table.focusCellHighlightBorder
@@ -928,6 +919,7 @@ Table.font
 Table.foreground
 Table.gridColor
 Table.intercellSpacing
+Table.paintOutsideAlternateRows
 Table.rowHeight
 Table.scrollPaneBorder
 Table.selectionBackground
@@ -1047,7 +1039,6 @@ TitlePane.inactiveBackground
 TitlePane.inactiveForeground
 TitlePane.maximizeIcon
 TitlePane.menuBarEmbedded
-TitlePane.menuBarResizeHeight
 TitlePane.menuBarTitleGap
 TitlePane.menuBarTitleMinimumGap
 TitlePane.noIconLeftGap
@@ -1079,7 +1070,6 @@ TitlePane.small.iconifyIcon
 TitlePane.small.inactiveBackground
 TitlePane.small.inactiveForeground
 TitlePane.small.maximizeIcon
-TitlePane.small.menuBarResizeHeight
 TitlePane.small.menuBarTitleGap
 TitlePane.small.menuBarTitleMinimumGap
 TitlePane.small.noIconLeftGap
@@ -1130,8 +1120,6 @@ ToggleButton.tab.selectedBackground
 ToggleButton.tab.selectedForeground
 ToggleButton.tab.underlineColor
 ToggleButton.tab.underlineHeight
-ToggleButton.textIconGap
-ToggleButton.textShiftOffset
 ToggleButton.toolbar.disabledSelectedBackground
 ToggleButton.toolbar.disabledSelectedForeground
 ToggleButton.toolbar.hoverBackground

gradle.properties

@@ -14,8 +14,8 @@
 # limitations under the License.
 #
 
-flatlaf.releaseVersion     = 3.3
+flatlaf.releaseVersion     = 3.4
-flatlaf.developmentVersion = 3.4-SNAPSHOT
+flatlaf.developmentVersion = 3.5-SNAPSHOT
 
 org.gradle.parallel = true
 # org.gradle.warning.mode = all