release 3.5.2

also check whether EventQueue.push() succeeded; if not, disable submenu safe triangle

.github/workflows/ci.yml

@@ -33,10 +33,11 @@ jobs:
           - 11  # LTS
           - 17  # LTS
           - 21  # LTS
+          - 23  # latest
         toolchain: [""]
-        include:
-          - java: 21
-            toolchain: 22  # latest
+#        include:
+#          - java: 21
+#            toolchain: 22  # latest
 
     steps:
       - uses: actions/checkout@v4

CHANGELOG.md

@@ -1,6 +1,56 @@
 FlatLaf Change Log
 ==================
 
+## 3.5.2
+
+#### Fixed bugs
+
+- Windows: Fixed repaint issues (ghosting) on some systems (probably depending
+  on graphics card/driver). This is done by setting Java system property
+  `sun.java2d.d3d.onscreen` to `false` (but only if `sun.java2d.d3d.onscreen`,
+  `sun.java2d.d3d` and `sun.java2d.noddraw` are not yet set), which disables
+  usage of Windows Direct3D (DirectX) onscreen surfaces. Component rendering
+  still uses Direct3D. (issue #887)
+- FlatLaf window decorations:
+  - Iconify/maximize/close buttons did not fill whole title bar height, if some
+    custom component in menu bar increases title bar height. (issue #897)
+  - Windows: Fixed possible application freeze when using custom component that
+    overrides `Component.contains(int x, int y)` and invokes
+    `SwingUtilities.convertPoint()` (or similar) from the overridden method.
+    (issue #878)
+- TextComponents: Fixed too fast scrolling in multi-line text components when
+  using touchpads (e.g. on macOS). (issue #892)
+- ToolBar: Fixed endless loop if button in Toolbar has focus and is made
+  invisible. (issue #884)
+
+#### Other Changes
+
+- FlatLaf window decorations: Added client property `JRootPane.titleBarHeight`
+  to allow specifying a (larger) preferred height for the title bar. (issue
+  #897)
+- Added system property `flatlaf.useRoundedPopupBorder` to allow disabling
+  native rounded popup borders on Windows 11 and macOS. On macOS 14.4+, where
+  rounded popup borders are disabled since FlatLaf 3.5 because of occasional
+  problems, you can use this to enable rounded popup borders (at your risk).
+
+
+## 3.5.1
+
+#### Fixed bugs
+
+- HTML: Fixed occasional cutoff wrapped text when using multi-line text in HTML
+  tags `<h1>`...`<h6>`, `<code>`, `<kbd>`, `<big>`, `<small>` or `<samp>`.
+  (issue #873; regression in 3.5)
+- Popup: Fixed `UnsupportedOperationException: PERPIXEL_TRANSLUCENT translucency
+  is not supported` exception on Haiku OS when showing popup (partly) outside of
+  window. (issue #869)
+- HiDPI: Fixed occasional wrong repaint areas when using
+  `HiDPIUtils.installHiDPIRepaintManager()`. (see PR #864)
+- Added system property `flatlaf.useSubMenuSafeTriangle` to allow disabling
+  submenu safe triangle (PR #490) for
+  [SWTSwing](https://github.com/Chrriis/SWTSwing). (issue #870)
+
+
 ## 3.5
 
 #### New features and improvements
@@ -16,6 +66,13 @@ FlatLaf Change Log
 
 #### Fixed bugs
 
+- macOS: Disabled rounded popup border (see PR #772) on macOS 14.4+ because it
+  may freeze the application and crash the macOS WindowServer process (reports
+  vary from Finder restarts to OS restarts). This is a temporary change until a
+  solution is found. See NetBeans issues
+  [apache/netbeans#7560](https://github.com/apache/netbeans/issues/7560#issuecomment-2226439215)
+  and
+  [apache/netbeans#6647](https://github.com/apache/netbeans/issues/6647#issuecomment-2070124442).
 - FlatLaf window decorations: Window top border on Windows 10 in "full window
   content" mode was not fully repainted when activating or deactivating window.
   (issue #809)
@@ -70,13 +127,6 @@ FlatLaf Change Log
   (some security software allows loading native library but blocks method
   invocation).
 - macOS: Fixed crash when running in WebSwing. (issue #826; regression in 3.4)
-- macOS: Disabled rounded popup border (see PR #772) on macOS 14.4+ because it
-  may freeze the application and crash the macOS WindowServer process (reports
-  vary from Finder restarts to OS restarts). This is a temporary change until a
-  solution is found. See NetBeans issues
-  [apache/netbeans#7560](https://github.com/apache/netbeans/issues/7560#issuecomment-2226439215)
-  and
-  [apache/netbeans#6647](https://github.com/apache/netbeans/issues/6647#issuecomment-2070124442).
 
 #### Incompatibilities
 

README.md

@@ -33,14 +33,20 @@ FlatLaf can use 3rd party themes created for IntelliJ Platform (see
 Sponsors
 --------
 
+### Current Sponsors
+
+[![None Sponsors](images/none-sponsors.png)](https://www.formdev.com/flatlaf/sponsor/)
+
+[Become a Sponsor](https://www.formdev.com/flatlaf/sponsor/)
+
+### Previous Sponsors
+
 <a href="https://www.ej-technologies.com/"><img src="https://www.formdev.com/flatlaf/sponsor/ej-technologies.png" width="200" alt="ej-technologies" title="ej-technologies - Java APM, Java Profiler, Java Installer Builder"></a>
 &nbsp; &nbsp; &nbsp; &nbsp;
 <a href="https://www.dbvis.com/"><img src="https://www.formdev.com/flatlaf/sponsor/dbvisualizer.svg" width="200" alt="DbVisualizer" title="DbVisualizer - SQL Client and Editor"></a>
 &nbsp; &nbsp; &nbsp; &nbsp;
 <a href="https://www.dscsag.com/"><img src="https://www.formdev.com/flatlaf/sponsor/DSC.png" height="48" alt="DSC Software AG" title="DSC Software AG - Your Companion for Integrative PLM"></a>
 
-[Become a Sponsor](https://www.formdev.com/flatlaf/sponsor/)
-
 Demo
 ----
 

flatlaf-core/flatlaf-core-sigtest.txt

@@ -1,5 +1,5 @@
 #Signature file v4.1
-#Version 3.5
+#Version 3.5.2
 
 CLSS public abstract interface com.formdev.flatlaf.FlatClientProperties
 fld public final static java.lang.String BUTTON_TYPE = "JButton.buttonType"
@@ -100,6 +100,7 @@ fld public final static java.lang.String TEXT_FIELD_TRAILING_COMPONENT = "JTextF
 fld public final static java.lang.String TEXT_FIELD_TRAILING_ICON = "JTextField.trailingIcon"
 fld public final static java.lang.String TITLE_BAR_BACKGROUND = "JRootPane.titleBarBackground"
 fld public final static java.lang.String TITLE_BAR_FOREGROUND = "JRootPane.titleBarForeground"
+fld public final static java.lang.String TITLE_BAR_HEIGHT = "JRootPane.titleBarHeight"
 fld public final static java.lang.String TITLE_BAR_SHOW_CLOSE = "JRootPane.titleBarShowClose"
 fld public final static java.lang.String TITLE_BAR_SHOW_ICON = "JRootPane.titleBarShowIcon"
 fld public final static java.lang.String TITLE_BAR_SHOW_ICONIFFY = "JRootPane.titleBarShowIconify"
@@ -223,6 +224,7 @@ meth public static java.util.Map<java.lang.String,java.lang.Class<?>> getStyleab
 meth public static java.util.Map<java.lang.String,java.lang.String> getGlobalExtraDefaults()
 meth public static java.util.function.Function<java.lang.String,java.awt.Color> getSystemColorGetter()
 meth public static javax.swing.UIDefaults$ActiveValue createActiveFontValue(float)
+meth public static void disableWindowsD3Donscreen()
 meth public static void hideMnemonics()
 meth public static void initIconColors(javax.swing.UIDefaults,boolean)
 meth public static void installLafInfo(java.lang.String,java.lang.Class<? extends javax.swing.LookAndFeel>)
@@ -296,6 +298,8 @@ fld public final static java.lang.String UPDATE_UI_ON_SYSTEM_FONT_CHANGE = "flat
 fld public final static java.lang.String USE_JETBRAINS_CUSTOM_DECORATIONS = "flatlaf.useJetBrainsCustomDecorations"
  anno 0 java.lang.Deprecated()
 fld public final static java.lang.String USE_NATIVE_LIBRARY = "flatlaf.useNativeLibrary"
+fld public final static java.lang.String USE_ROUNDED_POPUP_BORDER = "flatlaf.useRoundedPopupBorder"
+fld public final static java.lang.String USE_SUB_MENU_SAFE_TRIANGLE = "flatlaf.useSubMenuSafeTriangle"
 fld public final static java.lang.String USE_TEXT_Y_CORRECTION = "flatlaf.useTextYCorrection"
 fld public final static java.lang.String USE_UBUNTU_FONT = "flatlaf.useUbuntuFont"
 fld public final static java.lang.String USE_WINDOW_DECORATIONS = "flatlaf.useWindowDecorations"

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

@@ -461,7 +461,7 @@ public interface FlatClientProperties
 	 * {@link FlatSystemProperties#USE_WINDOW_DECORATIONS}, but higher priority
 	 * than UI default {@code TitlePane.useWindowDecorations}.
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
@@ -481,7 +481,7 @@ public interface FlatClientProperties
 	 * {@link FlatSystemProperties#MENUBAR_EMBEDDED}, but higher priority
 	 * than UI default {@code TitlePane.menuBarEmbedded}.
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
@@ -507,6 +507,8 @@ public interface FlatClientProperties
 	 * The user can left-click-and-drag on the title bar area to move the window,
 	 * except when clicking on a component that processes mouse events (e.g. buttons or menus).
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -537,7 +539,7 @@ public interface FlatClientProperties
 	 * <p>
 	 * This client property has higher priority than UI default {@code TitlePane.showIcon}.
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
@@ -553,6 +555,8 @@ public interface FlatClientProperties
 	 * Setting this shows/hides the windows title
 	 * for the {@code JFrame} or {@code JDialog} that contains the root pane.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -567,6 +571,8 @@ public interface FlatClientProperties
 	 * Setting this shows/hides the "iconify" button
 	 * for the {@code JFrame} that contains the root pane.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -581,6 +587,8 @@ public interface FlatClientProperties
 	 * Setting this shows/hides the "maximize/restore" button
 	 * for the {@code JFrame} that contains the root pane.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -595,6 +603,8 @@ public interface FlatClientProperties
 	 * Setting this shows/hides the "close" button
 	 * for the {@code JFrame} or {@code JDialog} that contains the root pane.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *
@@ -605,7 +615,7 @@ public interface FlatClientProperties
 	/**
 	 * Background color of window title bar (requires enabled window decorations).
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.awt.Color}
@@ -617,7 +627,7 @@ public interface FlatClientProperties
 	/**
 	 * Foreground color of window title bar (requires enabled window decorations).
 	 * <p>
-	 * (requires Window 10)
+	 * (requires Windows 10/11)
 	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.awt.Color}
@@ -626,10 +636,24 @@ public interface FlatClientProperties
 	 */
 	String TITLE_BAR_FOREGROUND = "JRootPane.titleBarForeground";
 
+	/**
+	 * Specifies the preferred height of title bar (requires enabled window decorations).
+	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.Integer}
+	 *
+	 * @since 3.5.2
+	 */
+	String TITLE_BAR_HEIGHT = "JRootPane.titleBarHeight";
+
 	/**
 	 * Specifies whether the glass pane should have full height and overlap the title bar,
 	 * if FlatLaf window decorations are enabled. Default is {@code false}.
 	 * <p>
+	 * (requires Windows 10/11)
+	 * <p>
 	 * <strong>Component</strong> {@link javax.swing.JRootPane}<br>
 	 * <strong>Value type</strong> {@link java.lang.Boolean}
 	 *

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

@@ -20,6 +20,7 @@ import java.awt.Color;
 import java.awt.Component;
 import java.awt.EventQueue;
 import java.awt.Font;
+import java.awt.GraphicsEnvironment;
 import java.awt.Image;
 import java.awt.RenderingHints;
 import java.awt.Toolkit;
@@ -119,6 +120,46 @@ public abstract class FlatLaf
 	private static String preferredSemiboldFontFamily;
 	private static String preferredMonospacedFontFamily;
 
+	static {
+		// see disableWindowsD3Donscreen() for details
+		// https://github.com/JFormDesigner/FlatLaf/issues/887
+		if( SystemInfo.isWindows &&
+			System.getProperty( "sun.java2d.d3d.onscreen" ) == null &&
+			System.getProperty( "sun.java2d.d3d" ) == null &&
+			System.getProperty( "sun.java2d.noddraw" ) == null )
+		  System.setProperty( "sun.java2d.d3d.onscreen", "false" );
+	}
+
+	/**
+	 * Disable usage of Windows Direct3D (DirectX) onscreen surfaces because this may lead to
+	 * repaint issues (ghosting) on some systems (probably depending on graphics card/driver).
+	 * Problem occurs usually when a small heavy-weight popup window (menu, combobox, tooltip) is shown.
+	 * <p>
+	 * Sets system property {@code sun.java2d.d3d.onscreen} to {@code false},
+	 * but only if {@code sun.java2d.d3d.onscreen}, {@code sun.java2d.d3d}
+	 * and {@code sun.java2d.noddraw} are not yet set.
+	 * <p>
+	 * <strong>Note</strong>: Must be invoked very early before the graphics environment is created.
+	 * <p>
+	 * This method is automatically invoked when loading this class,
+	 * which is usually before the graphics environment is created.
+	 * E.g. when doing {@code FlatLightLaf.setup()} or
+	 * {@code UIManager.setLookAndFeel( "com.formdev.flatlaf.FlatLightLaf" )}.
+	 * <p>
+	 * However, it may be invoked too late if you use some methods from {@link UIManager}
+	 * of {@link GraphicsEnvironment} before setting look and feel.
+	 * E.g. {@link UIManager#put(Object, Object)}.
+	 * In that case invoke this method yourself very early.
+	 * <p>
+	 * <strong>Tip</strong>: How to find out when the graphics environment is created?
+	 * Set a breakpoint at constructor of class {@link GraphicsEnvironment} and look at the stack.
+	 *
+	 * @since 3.5.2
+	 */
+	public static void disableWindowsD3Donscreen() {
+		// dummy method used to trigger invocation of "static {...}" block
+	}
+
 	/**
 	 * Sets the application look and feel to the given LaF
 	 * using {@link UIManager#setLookAndFeel(javax.swing.LookAndFeel)}.

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

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

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

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

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

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

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

@@ -60,23 +60,24 @@ public abstract class FlatWindowAbstractIcon
 
 	@Override
 	protected void paintIcon( Component c, Graphics2D g ) {
-		paintBackground( c, g );
-
 		g.setColor( getForeground( c ) );
 		HiDPIUtils.paintAtScale1x( g, 0, 0, width, height, this::paintIconAt1x );
 	}
 
 	protected abstract void paintIconAt1x( Graphics2D g, int x, int y, int width, int height, double scaleFactor );
 
-	protected void paintBackground( Component c, Graphics2D g ) {
+	/** @since 3.5.2 */
+	@Override
+	protected void paintBackground( Component c, Graphics2D g, int x, int y ) {
 		Color background = FlatButtonUI.buttonStateColor( c, null, null, null, hoverBackground, pressedBackground );
 		if( background != null ) {
 			// disable antialiasing for background rectangle painting to avoid blurry edges when scaled (e.g. at 125% or 175%)
 			Object oldHint = g.getRenderingHint( RenderingHints.KEY_ANTIALIASING );
 			g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF );
 
+			// fill background of whole component
 			g.setColor( FlatUIUtils.deriveColor( background, c.getBackground() ) );
-			g.fillRect( 0, 0, width, height );
+			g.fillRect( 0, 0, c.getWidth(), c.getHeight() );
 
 			g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, oldHint );
 		}

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

@@ -19,13 +19,22 @@ package com.formdev.flatlaf.ui;
 import java.awt.Color;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Locale;
+import java.util.Set;
+import javax.swing.AbstractButton;
 import javax.swing.JComponent;
+import javax.swing.JLabel;
+import javax.swing.JToolTip;
 import javax.swing.plaf.basic.BasicHTML;
+import javax.swing.text.AttributeSet;
 import javax.swing.text.Document;
 import javax.swing.text.LabelView;
 import javax.swing.text.Style;
 import javax.swing.text.StyleConstants;
 import javax.swing.text.View;
+import javax.swing.text.html.CSS;
 import javax.swing.text.html.HTMLDocument;
 import javax.swing.text.html.StyleSheet;
 
@@ -42,7 +51,7 @@ public class FlatHTML
 	 * which re-calculates font sizes based on current component font size.
 	 * This is necessary for "absolute-size" keywords (e.g. "x-large")
 	 * for "font-size" attributes in default style sheet (see javax/swing/text/html/default.css).
-	 * See also <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/font-size?retiredLocale=de#values">CSS font-size</a>.
+	 * See also <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/font-size#values">CSS font-size</a>.
 	 * <p>
 	 * This method should be invoked after {@link BasicHTML#updateRenderer(JComponent, String)}.
 	 */
@@ -61,16 +70,86 @@ public class FlatHTML
 		//  - if point size at index 7 is not 36, then probably HTML text contains BASE_SIZE rule
 		//  - if point size at index 4 is equal to given font size, then it is not necessary to add BASE_SIZE rule
 		StyleSheet styleSheet = ((HTMLDocument)doc).getStyleSheet();
+/*debug
+		for( int i = 1; i <= 7; i++ )
+			System.out.println( i+": "+ styleSheet.getPointSize( i ) );
+debug*/
 		int fontBaseSize = c.getFont().getSize();
 		if( styleSheet.getPointSize( 7 ) != 36f ||
 			styleSheet.getPointSize( 4 ) == fontBaseSize )
 		  return;
 
-		// BASE_SIZE rule is parsed in javax.swing.text.html.StyleSheet.addRule()
-		styleSheet.addRule( "BASE_SIZE " + fontBaseSize );
-		clearViewCaches( view );
+		// check whether view uses "absolute-size" keywords (e.g. "x-large") for font-size
+		if( !usesAbsoluteSizeKeywordForFontSize( view ) )
+			return;
 
-//		dumpViews( view, 0 );
+		// get HTML text from component
+		String text;
+		if( c instanceof JLabel )
+			text = ((JLabel)c).getText();
+		else if( c instanceof AbstractButton )
+			text = ((AbstractButton)c).getText();
+		else if( c instanceof JToolTip )
+			text = ((JToolTip)c).getTipText();
+		else
+			return;
+		if( text == null )
+			return;
+
+		// BASE_SIZE rule is parsed in javax.swing.text.html.StyleSheet.addRule()
+		String style = "<style>BASE_SIZE " + c.getFont().getSize() + "</style>";
+		String openTag = "";
+		String closeTag = "";
+
+		String lowerText = text.toLowerCase( Locale.ENGLISH );
+		int headIndex;
+		int styleIndex;
+
+		int insertIndex;
+		if( (headIndex = lowerText.indexOf( "<head>" )) >= 0 ) {
+			// there is a <head> tag --> insert after <head> tag
+			insertIndex = headIndex + "<head>".length();
+		} else if( (styleIndex = lowerText.indexOf( "<style>" )) >= 0 ) {
+			// there is a <style> tag --> insert before <style> tag
+			insertIndex = styleIndex;
+		} else {
+			// no <head> or <style> tag --> insert <head> tag after <html> tag
+			insertIndex = "<html>".length();
+			openTag = "<head>";
+			closeTag = "</head>";
+		}
+
+		String newText = text.substring( 0, insertIndex )
+			+ openTag + style + closeTag
+			+ text.substring( insertIndex );
+
+		BasicHTML.updateRenderer( c, newText );
+	}
+
+	private static final Set<String> absoluteSizeKeywordsSet = new HashSet<>( Arrays.asList(
+		"xx-small", "x-small", "small", "medium", "large", "x-large", "xx-large" ) );
+
+	/**
+	 * Checks whether view uses "absolute-size" keywords (e.g. "x-large") for font-size
+	 * (see javax/swing/text/html/default.css).
+	 */
+	private static boolean usesAbsoluteSizeKeywordForFontSize( View view ) {
+		AttributeSet attributes = view.getAttributes();
+		if( attributes != null ) {
+			Object fontSize = attributes.getAttribute( CSS.Attribute.FONT_SIZE );
+			if( fontSize != null ) {
+				if( absoluteSizeKeywordsSet.contains( fontSize.toString() ) )
+					return true;
+			}
+		}
+
+		int viewCount = view.getViewCount();
+		for( int i = 0; i < viewCount; i++ ) {
+			if( usesAbsoluteSizeKeywordForFontSize( view.getView( i ) ) )
+				return true;
+		}
+
+		return false;
 	}
 
 	/**
@@ -128,8 +207,8 @@ public class FlatHTML
 	 * updates the HTML view.
 	 */
 	public static void propertyChange( PropertyChangeEvent e ) {
-		if( BasicHTML.propertyKey.equals( e.getPropertyName() ) )
-			FlatHTML.updateRendererCSSFontBaseSize( (JComponent) e.getSource() );
+		if( BasicHTML.propertyKey.equals( e.getPropertyName() ) && e.getNewValue() instanceof View )
+			updateRendererCSSFontBaseSize( (JComponent) e.getSource() );
 	}
 
 /*debug
@@ -142,15 +221,27 @@ public class FlatHTML
 	public static void dumpViews( View view, int indent ) {
 		for( int i = 0; i < indent; i++ )
 			System.out.print( "    " );
-		System.out.print( view.getClass().isAnonymousClass() ? view.getClass().getName() : view.getClass().getSimpleName() );
-		if( view instanceof LabelView ) {
-			LabelView lview = ((LabelView)view);
-			Font font = lview.getFont();
-			Color foreground = lview.getForeground();
-			System.out.printf( "  %2d-%-2d  %-14s %d  #%06x",
-				lview.getStartOffset(), lview.getEndOffset() - 1,
-				font.getName(), font.getSize(),
-				foreground.getRGB() & 0xffffff );
+
+		System.out.printf( "%s @%-8x   %3d,%2d",
+			view.getClass().isAnonymousClass() ? view.getClass().getName() : view.getClass().getSimpleName(),
+			System.identityHashCode( view ),
+			(int) view.getPreferredSpan( View.X_AXIS ),
+			(int) view.getPreferredSpan( View.Y_AXIS ) );
+
+		AttributeSet attrs = view.getAttributes();
+		if( attrs != null ) {
+			Object fontSize = attrs.getAttribute( CSS.Attribute.FONT_SIZE );
+			System.out.printf( "  %-8s", fontSize );
+		}
+
+		if( view instanceof javax.swing.text.GlyphView ) {
+			javax.swing.text.GlyphView gview = ((javax.swing.text.GlyphView)view);
+			java.awt.Font font = gview.getFont();
+			System.out.printf( "   %3d-%-3d  %s %2d (@%x)  #%06x  '%s'",
+				gview.getStartOffset(), gview.getEndOffset() - 1,
+				font.getName(), font.getSize(), System.identityHashCode( font ),
+				gview.getForeground().getRGB() & 0xffffff,
+				gview.getText( gview.getStartOffset(), gview.getEndOffset() ) );
 		}
 		System.out.println();
 

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

@@ -36,6 +36,8 @@ import java.awt.Toolkit;
 import java.awt.Window;
 import java.awt.event.ComponentEvent;
 import java.awt.event.ComponentListener;
+import java.awt.event.HierarchyEvent;
+import java.awt.event.HierarchyListener;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowFocusListener;
 import java.lang.invoke.MethodHandle;
@@ -43,6 +45,7 @@ import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
+import java.util.concurrent.atomic.AtomicReference;
 import javax.swing.JComponent;
 import javax.swing.JLayeredPane;
 import javax.swing.JPanel;
@@ -60,6 +63,7 @@ import javax.swing.border.EmptyBorder;
 import javax.swing.border.LineBorder;
 import javax.swing.plaf.basic.BasicComboPopup;
 import com.formdev.flatlaf.FlatClientProperties;
+import com.formdev.flatlaf.FlatSystemProperties;
 import com.formdev.flatlaf.util.SystemInfo;
 import com.formdev.flatlaf.util.UIScale;
 
@@ -113,13 +117,7 @@ public class FlatPopupFactory
 		// macOS and Linux adds drop shadow to heavy weight popups
 		if( SystemInfo.isMacOS || SystemInfo.isLinux ) {
 			NonFlashingPopup popup = new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, true ), owner, contents );
-			if( popup.popupWindow != null && SystemInfo.isMacOS &&
-					// do not use rounded border on macOS 14.4+ because it may freeze the application
-					// and crash the macOS WindowServer process (reports vary from Finder restarts to OS restarts)
-					// https://github.com/apache/netbeans/issues/7560#issuecomment-2226439215
-					// https://github.com/apache/netbeans/issues/6647#issuecomment-2070124442
-					SystemInfo.osVersion < SystemInfo.toVersion( 14, 4, 0, 0 ) &&
-					FlatNativeMacLibrary.isLoaded() )
+			if( popup.popupWindow != null && isMacOSBorderSupported() )
 				setupRoundedBorder( popup.popupWindow, owner, contents );
 			return popup;
 		}
@@ -139,7 +137,10 @@ public class FlatPopupFactory
 			forceHeavyWeight = true;
 
 		// create drop shadow popup
-		return new DropShadowPopup( getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight ), owner, contents );
+		Popup popupForScreenOfOwner = getPopupForScreenOfOwner( owner, contents, x, y, forceHeavyWeight );
+		return owner.getGraphicsConfiguration().isTranslucencyCapable()
+			? new DropShadowPopup( popupForScreenOfOwner, owner, contents )
+			: new NonFlashingPopup( popupForScreenOfOwner, owner, contents );
 	}
 
 	/**
@@ -357,19 +358,29 @@ public class FlatPopupFactory
 	//---- native rounded border ----------------------------------------------
 
 	private static boolean isWindows11BorderSupported() {
-		return SystemInfo.isWindows_11_orLater && FlatNativeWindowsLibrary.isLoaded();
+		return SystemInfo.isWindows_11_orLater &&
+			FlatSystemProperties.getBoolean( FlatSystemProperties.USE_ROUNDED_POPUP_BORDER, true ) &&
+			FlatNativeWindowsLibrary.isLoaded();
+	}
+
+	private static boolean isMacOSBorderSupported() {
+		// do not use rounded border on macOS 14.4+ because it may freeze the application
+		// and crash the macOS WindowServer process (reports vary from Finder restarts to OS restarts)
+		// https://github.com/apache/netbeans/issues/7560#issuecomment-2226439215
+		// https://github.com/apache/netbeans/issues/6647#issuecomment-2070124442
+		boolean isMacOS_14_4_orLater = (SystemInfo.osVersion >= SystemInfo.toVersion( 14, 4, 0, 0 ));
+
+		return SystemInfo.isMacOS &&
+			FlatSystemProperties.getBoolean( FlatSystemProperties.USE_ROUNDED_POPUP_BORDER, !isMacOS_14_4_orLater ) &&
+			FlatNativeMacLibrary.isLoaded();
 	}
 
 	private static void setupRoundedBorder( Window popupWindow, Component owner, Component contents ) {
-		// make sure that the native window is created
-		if( !popupWindow.isDisplayable() )
-			popupWindow.addNotify();
-
 		int borderCornerRadius = getBorderCornerRadius( owner, contents );
 		float borderWidth = getRoundedBorderWidth( owner, contents );
 
 		// get Swing border color
-		Color borderColor = null; // use system default color
+		Color borderColor;
 		if( contents instanceof JComponent ) {
 			Border border = ((JComponent)contents).getBorder();
 			border = FlatUIUtils.unwrapNonUIResourceBorder( border );
@@ -381,11 +392,33 @@ public class FlatPopupFactory
 				borderColor = ((LineBorder)border).getLineColor();
 			else if( border instanceof EmptyBorder )
 				borderColor = FlatNativeWindowsLibrary.COLOR_NONE; // do not paint border
+			else
+				borderColor = null; // use system default color
 
 			// avoid that FlatLineBorder paints the Swing border
 			((JComponent)contents).putClientProperty( KEY_POPUP_USES_NATIVE_BORDER, true );
-		}
+		} else
+			borderColor = null; // use system default color
 
+		if( popupWindow.isDisplayable() ) {
+			// native window already created
+			setupRoundedBorderImpl( popupWindow, borderCornerRadius, borderWidth, borderColor );
+		} else {
+			// native window not yet created --> add listener to set native border after window creation
+			AtomicReference<HierarchyListener> l = new AtomicReference<>();
+			l.set( e -> {
+				if( e.getID() == HierarchyEvent.HIERARCHY_CHANGED &&
+					(e.getChangeFlags() & HierarchyEvent.DISPLAYABILITY_CHANGED) != 0 )
+				{
+					setupRoundedBorderImpl( popupWindow, borderCornerRadius, borderWidth, borderColor );
+					popupWindow.removeHierarchyListener( l.get() );
+				}
+			} );
+			popupWindow.addHierarchyListener( l.get() );
+		}
+	}
+
+	private static void setupRoundedBorderImpl( Window popupWindow, int borderCornerRadius, float borderWidth, Color borderColor ) {
 		if( SystemInfo.isWindows ) {
 			// get native window handle
 			long hwnd = FlatNativeWindowsLibrary.getHWND( popupWindow );

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

@@ -448,6 +448,11 @@ public class FlatRootPaneUI
 					titlePane.titleBarColorsChanged();
 				break;
 
+			case FlatClientProperties.TITLE_BAR_HEIGHT:
+				if( titlePane != null )
+					titlePane.revalidate();
+				break;
+
 			case FlatClientProperties.FULL_WINDOW_CONTENT:
 				if( titlePane != null ) {
 					rootPane.getLayeredPane().setLayer( titlePane, getLayerForTitlePane() );

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

@@ -210,7 +210,7 @@ public class FlatScrollPaneUI
 
 			// Use (0, 0) view position to obtain a constant unit increment of first item.
 			// Unit increment may be different for each item.
-			Rectangle visibleRect = new Rectangle( viewport.getViewSize() );
+			Rectangle visibleRect = new Rectangle( viewport.getExtentSize() );
 			unitIncrement = scrollable.getScrollableUnitIncrement( visibleRect, orientation, 1 );
 
 			if( unitIncrement > 0 ) {

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

@@ -1685,7 +1685,7 @@ debug*/
 			w - (ci.left / 100f) - (ci.right / 100f), h - (ci.top / 100f) - (ci.bottom / 100f) ), false );
 
 		// add gap for selected tab to path
-		if( getTabType() == TAB_TYPE_CARD ) {
+		if( getTabType() == TAB_TYPE_CARD && selectedIndex >= 0 ) {
 			float csh = scale( (float) contentSeparatorHeight );
 
 			Rectangle tabRect = getTabBounds( tabPane, selectedIndex );

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

@@ -359,6 +359,10 @@ public class FlatTitlePane
 			@Override
 			public Dimension getPreferredSize() {
 				Dimension size = super.getPreferredSize();
+				int titleBarHeight = clientPropertyInt( rootPane, TITLE_BAR_HEIGHT, -1 );
+				if( titleBarHeight >= 0 )
+					return new Dimension( size.width, UIScale.scale( titleBarHeight ) );
+
 				if( buttonMaximizedHeight > 0 && isWindowMaximized() && !hasVisibleEmbeddedMenuBar( rootPane.getJMenuBar() ) ) {
 					// make title pane height smaller when frame is maximized
 					size = new Dimension( size.width, Math.min( size.height, UIScale.scale( buttonMaximizedHeight ) ) );
@@ -395,6 +399,12 @@ public class FlatTitlePane
 				// allow the button to shrink if space is rare
 				return new Dimension( UIScale.scale( buttonMinimumWidth ), super.getMinimumSize().height );
 			}
+			@Override
+			public Dimension getMaximumSize() {
+				// allow the button to fill whole button area height
+				// see also BasicMenuUI.getMaximumSize()
+				return new Dimension( super.getMaximumSize().width, Short.MAX_VALUE );
+			}
 		};
 		button.setFocusable( false );
 		button.setContentAreaFilled( false );
@@ -1079,7 +1089,7 @@ public class FlatTitlePane
 	}
 
 	private boolean isTitleBarCaptionAt( Component c, int x, int y ) {
-		if( !c.isDisplayable() || !c.isVisible() || !c.contains( x, y ) || c == mouseLayer )
+		if( !c.isDisplayable() || !c.isVisible() || !contains( c, x, y ) || c == mouseLayer )
 			return true; // continue checking with next component
 
 		if( c.isEnabled() &&
@@ -1131,6 +1141,16 @@ public class FlatTitlePane
 		return true;
 	}
 
+	/**
+	 * Same as {@link Component#contains(int, int)}, but not using that method
+	 * because it may be overridden by custom components and invoke code that
+	 * tries to request AWT tree lock on 'AWT-Windows' thread.
+	 * This could freeze the application if AWT tree is already locked on 'AWT-EventQueue' thread.
+	 */
+	private boolean contains( Component c, int x, int y ) {
+		return x >= 0 && y >= 0 && x < c.getWidth() && y < c.getHeight();
+	}
+
 	private int lastCaptionHitTestX;
 	private int lastCaptionHitTestY;
 	private long lastCaptionHitTestTime;

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

@@ -531,8 +531,11 @@ public class FlatToolBarUI
 
 		private Component getRecentComponent( Container aContainer, boolean first ) {
 			// if moving focus into the toolbar, focus recently focused toolbar button
-			if( focusedCompIndex >= 0 && focusedCompIndex < toolBar.getComponentCount() )
-				return toolBar.getComponent( focusedCompIndex );
+			if( focusedCompIndex >= 0 && focusedCompIndex < toolBar.getComponentCount() ) {
+				Component c = toolBar.getComponent( focusedCompIndex );
+				if( accept( c ) )
+					return c;
+			}
 
 			return first
 				? super.getFirstComponent( aContainer )

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

@@ -521,12 +521,12 @@ public class HiDPIUtils
 			int x2 = x + c.getX();
 			int y2 = y + c.getY();
 			for( Component p = c.getParent(); p != null; p = p.getParent() ) {
-				x2 += p.getX();
-				y2 += p.getY();
 				if( x2 + width < p.getWidth() && y2 + height < p.getHeight() && p instanceof JComponent ) {
 					callback.addDirtyRegion( (JComponent) p, x2, y2, width, height );
 					return;
 				}
+				x2 += p.getX();
+				y2 += p.getY();
 			}
 		}
 

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

@@ -21,6 +21,7 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import javax.swing.*;
 import javax.swing.border.*;
+import com.formdev.flatlaf.FlatClientProperties;
 import com.formdev.flatlaf.demo.ScrollablePanel;
 import net.miginfocom.swing.*;
 
@@ -63,6 +64,15 @@ public class FlatOptionPaneTest
 		UIManager.put( "OptionPane.showIcon", showTitleBarIconCheckBox.isSelected() );
 	}
 
+	private void showWithCustomIcon() {
+		JOptionPane optionPane = new JOptionPane( "Hello world." );
+		JDialog dialog = optionPane.createDialog( "With Custom Icon" );
+		dialog.getRootPane().putClientProperty( FlatClientProperties.TITLE_BAR_SHOW_ICON, true );
+		dialog.setIconImage( new ImageIcon( FlatOptionPaneTest.class.getResource( "/com/formdev/flatlaf/testing/test32.png" ) ).getImage() );
+		dialog.setVisible( true );
+		dialog.dispose();
+	}
+
 	private void initComponents() {
 		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
 		ScrollablePanel panel9 = new ScrollablePanel();
@@ -75,6 +85,7 @@ public class FlatOptionPaneTest
 		JPanel panel2 = new JPanel();
 		JOptionPane errorOptionPane = new JOptionPane();
 		errorShowDialogLabel = new FlatOptionPaneTest.ShowDialogLinkLabel();
+		JButton showWithCustomIconButton = new JButton();
 		JLabel informationLabel = new JLabel();
 		JPanel panel3 = new JPanel();
 		JOptionPane informationOptionPane = new JOptionPane();
@@ -173,6 +184,11 @@ public class FlatOptionPaneTest
 			errorShowDialogLabel.setOptionPane(errorOptionPane);
 			panel9.add(errorShowDialogLabel, "cell 1 1");
 
+			//---- showWithCustomIconButton ----
+			showWithCustomIconButton.setText("Show with custom icon");
+			showWithCustomIconButton.addActionListener(e -> showWithCustomIcon());
+			panel9.add(showWithCustomIconButton, "cell 2 1");
+
 			//---- informationLabel ----
 			informationLabel.setText("Information");
 			panel9.add(informationLabel, "cell 0 2");

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

@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "7.0.4.0.360" Java: "16" encoding: "UTF-8"
+JFDML JFormDesigner: "8.2.3.0.386" Java: "21" encoding: "UTF-8"
 
 new FormModel {
 	contentType: "form/swing"
@@ -83,6 +83,13 @@ new FormModel {
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 					"value": "cell 1 1"
 				} )
+				add( new FormComponent( "javax.swing.JButton" ) {
+					name: "showWithCustomIconButton"
+					"text": "Show with custom icon"
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "showWithCustomIcon", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 2 1"
+				} )
 				add( new FormComponent( "javax.swing.JLabel" ) {
 					name: "informationLabel"
 					"text": "Information"

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

@@ -127,6 +127,9 @@ public class FlatWindowDecorationsTest
 						+ "   @ " + bounds.x + ", " + bounds.y );
 				} else
 					fullWindowContentButtonsBoundsField.setText( "null" );
+
+				fullWindowContentButtonsBoundsLabel.setEnabled( bounds != null );
+				fullWindowContentButtonsBoundsField.setEnabled( bounds != null );
 			} );
 		}
 	}
@@ -189,6 +192,7 @@ public class FlatWindowDecorationsTest
 
 		if( rightCompCheckBox.isSelected() ) {
 			rightStretchCompCheckBox.setSelected( false );
+			tallCompCheckBox.setSelected( false );
 
 			JButton myButton = new JButton( "?" );
 			myButton.putClientProperty( "JButton.buttonType", "toolBarButton" );
@@ -207,6 +211,7 @@ public class FlatWindowDecorationsTest
 
 		if( rightStretchCompCheckBox.isSelected() ) {
 			rightCompCheckBox.setSelected( false );
+			tallCompCheckBox.setSelected( false );
 
 			menuBar.add( Box.createGlue() );
 			menuBar.add( new JProgressBar() );
@@ -216,6 +221,20 @@ public class FlatWindowDecorationsTest
 		menuBar.repaint();
 	}
 
+	private void tallCompChanged() {
+		removeNonMenusFromMenuBar();
+
+		if( tallCompCheckBox.isSelected() ) {
+			rightCompCheckBox.setSelected( false );
+			rightStretchCompCheckBox.setSelected( false );
+
+			menuBar.add( new JButton( "<html>large<br>button<br>large<br>button</html>" ) );
+		}
+
+		menuBar.revalidate();
+		menuBar.repaint();
+	}
+
 	private void removeNonMenusFromMenuBar() {
 		Component[] components = menuBar.getComponents();
 		for( int i = components.length - 1; i >= 0; i-- ) {
@@ -546,6 +565,16 @@ debug*/
 		}
 	}
 
+	private void titleBarHeightChanged() {
+		JRootPane rootPane = getWindowRootPane();
+		if( rootPane != null ) {
+			boolean enabled = titleBarHeightCheckBox.isSelected();
+			titleBarHeightField.setEnabled( enabled );
+
+			rootPane.putClientProperty( FlatClientProperties.TITLE_BAR_HEIGHT, enabled ? titleBarHeightField.getValue() : null );
+		}
+	}
+
 	private JRootPane getWindowRootPane() {
 		Window window = SwingUtilities.windowForComponent( this );
 		return (window instanceof RootPaneContainer)
@@ -572,12 +601,14 @@ debug*/
 		maximizedBoundsCheckBox = new JCheckBox();
 		JPanel panel4 = new JPanel();
 		showIconCheckBox = new FlatTriStateCheckBox();
+		titleBarHeightCheckBox = new JCheckBox();
 		showTitleCheckBox = new JCheckBox();
+		titleBarHeightField = new JSpinner();
 		showIconifyCheckBox = new JCheckBox();
 		showMaximizeCheckBox = new JCheckBox();
 		showCloseCheckBox = new JCheckBox();
 		fullWindowContentCheckBox = new JCheckBox();
-		JLabel fullWindowContentButtonsBoundsLabel = new JLabel();
+		fullWindowContentButtonsBoundsLabel = new JLabel();
 		fullWindowContentButtonsBoundsField = new JLabel();
 		JPanel panel6 = new JPanel();
 		menuBarCheckBox = new JCheckBox();
@@ -585,6 +616,7 @@ debug*/
 		menuBarVisibleCheckBox = new JCheckBox();
 		rightCompCheckBox = new JCheckBox();
 		rightStretchCompCheckBox = new JCheckBox();
+		tallCompCheckBox = new JCheckBox();
 		JPanel panel3 = new JPanel();
 		addMenuButton = new JButton();
 		addGlueButton = new JButton();
@@ -660,7 +692,8 @@ debug*/
 			"[fill]" +
 			"[fill]" +
 			"[]" +
-			"[]"));
+			"[]" +
+			"[40]"));
 
 		//======== panel7 ========
 		{
@@ -711,7 +744,8 @@ debug*/
 			panel4.setLayout(new MigLayout(
 				"ltr,hidemode 3,gap 0 0",
 				// columns
-				"[grow,left]",
+				"[grow,left]" +
+				"[fill]",
 				// rows
 				"[]" +
 				"[]" +
@@ -726,12 +760,23 @@ debug*/
 			showIconCheckBox.addActionListener(e -> showIconChanged());
 			panel4.add(showIconCheckBox, "cell 0 0");
 
+			//---- titleBarHeightCheckBox ----
+			titleBarHeightCheckBox.setText("Height:");
+			titleBarHeightCheckBox.addActionListener(e -> titleBarHeightChanged());
+			panel4.add(titleBarHeightCheckBox, "cell 1 0");
+
 			//---- showTitleCheckBox ----
 			showTitleCheckBox.setText("show title");
 			showTitleCheckBox.setSelected(true);
 			showTitleCheckBox.addActionListener(e -> showTitleChanged());
 			panel4.add(showTitleCheckBox, "cell 0 1");
 
+			//---- titleBarHeightField ----
+			titleBarHeightField.setEnabled(false);
+			titleBarHeightField.setModel(new SpinnerNumberModel(44, null, null, 2));
+			titleBarHeightField.addChangeListener(e -> titleBarHeightChanged());
+			panel4.add(titleBarHeightField, "cell 1 1");
+
 			//---- showIconifyCheckBox ----
 			showIconifyCheckBox.setText("show iconfiy");
 			showIconifyCheckBox.setSelected(true);
@@ -757,10 +802,12 @@ debug*/
 
 			//---- fullWindowContentButtonsBoundsLabel ----
 			fullWindowContentButtonsBoundsLabel.setText("Buttons bounds:");
+			fullWindowContentButtonsBoundsLabel.setEnabled(false);
 			panel4.add(fullWindowContentButtonsBoundsLabel, "cell 0 6");
 
 			//---- fullWindowContentButtonsBoundsField ----
 			fullWindowContentButtonsBoundsField.setText("null");
+			fullWindowContentButtonsBoundsField.setEnabled(false);
 			panel4.add(fullWindowContentButtonsBoundsField, "cell 0 6");
 		}
 		add(panel4, "cell 1 0");
@@ -777,6 +824,7 @@ debug*/
 				"[]" +
 				"[]" +
 				"[]" +
+				"[]" +
 				"[]"));
 
 			//---- menuBarCheckBox ----
@@ -806,6 +854,11 @@ debug*/
 			rightStretchCompCheckBox.setText("right aligned stretching component");
 			rightStretchCompCheckBox.addActionListener(e -> rightStretchCompChanged());
 			panel6.add(rightStretchCompCheckBox, "cell 0 4");
+
+			//---- tallCompCheckBox ----
+			tallCompCheckBox.setText("tall component");
+			tallCompCheckBox.addActionListener(e -> tallCompChanged());
+			panel6.add(tallCompCheckBox, "cell 0 5");
 		}
 		add(panel6, "cell 2 0");
 
@@ -1243,17 +1296,21 @@ debug*/
 	private JCheckBox fullScreenCheckBox;
 	private JCheckBox maximizedBoundsCheckBox;
 	private FlatTriStateCheckBox showIconCheckBox;
+	private JCheckBox titleBarHeightCheckBox;
 	private JCheckBox showTitleCheckBox;
+	private JSpinner titleBarHeightField;
 	private JCheckBox showIconifyCheckBox;
 	private JCheckBox showMaximizeCheckBox;
 	private JCheckBox showCloseCheckBox;
 	private JCheckBox fullWindowContentCheckBox;
+	private JLabel fullWindowContentButtonsBoundsLabel;
 	private JLabel fullWindowContentButtonsBoundsField;
 	private JCheckBox menuBarCheckBox;
 	private JCheckBox menuBarEmbeddedCheckBox;
 	private JCheckBox menuBarVisibleCheckBox;
 	private JCheckBox rightCompCheckBox;
 	private JCheckBox rightStretchCompCheckBox;
+	private JCheckBox tallCompCheckBox;
 	private JButton addMenuButton;
 	private JButton addGlueButton;
 	private JButton addCaptionButton;

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

@@ -1,4 +1,4 @@
-JFDML JFormDesigner: "8.2.1.0.348" Java: "21.0.1" encoding: "UTF-8"
+JFDML JFormDesigner: "8.2.3.0.386" Java: "21" 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][][][40]"
 		} ) {
 			name: "this"
 			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
@@ -76,7 +76,7 @@ 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]"
+				"$columnConstraints": "[grow,left][fill]"
 				"$rowConstraints": "[][][][][]rel[]rel[]"
 			} ) {
 				name: "panel4"
@@ -91,6 +91,16 @@ new FormModel {
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 					"value": "cell 0 0"
 				} )
+				add( new FormComponent( "javax.swing.JCheckBox" ) {
+					name: "titleBarHeightCheckBox"
+					"text": "Height:"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "titleBarHeightChanged", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 1 0"
+				} )
 				add( new FormComponent( "javax.swing.JCheckBox" ) {
 					name: "showTitleCheckBox"
 					"text": "show title"
@@ -102,6 +112,20 @@ new FormModel {
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 					"value": "cell 0 1"
 				} )
+				add( new FormComponent( "javax.swing.JSpinner" ) {
+					name: "titleBarHeightField"
+					"enabled": false
+					"model": new javax.swing.SpinnerNumberModel {
+						stepSize: 2
+						value: 44
+					}
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "javax.swing.event.ChangeListener", "stateChanged", "titleBarHeightChanged", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 1 1"
+				} )
 				add( new FormComponent( "javax.swing.JCheckBox" ) {
 					name: "showIconifyCheckBox"
 					"text": "show iconfiy"
@@ -148,12 +172,17 @@ new FormModel {
 				add( new FormComponent( "javax.swing.JLabel" ) {
 					name: "fullWindowContentButtonsBoundsLabel"
 					"text": "Buttons bounds:"
+					"enabled": false
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 					"value": "cell 0 6"
 				} )
 				add( new FormComponent( "javax.swing.JLabel" ) {
 					name: "fullWindowContentButtonsBoundsField"
 					"text": "null"
+					"enabled": false
 					auxiliary() {
 						"JavaCodeGenerator.variableLocal": false
 					}
@@ -166,7 +195,7 @@ 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": "[][][][][][]"
 			} ) {
 				name: "panel6"
 				"border": new javax.swing.border.TitledBorder( "Menu Bar" )
@@ -223,6 +252,16 @@ new FormModel {
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 					"value": "cell 0 4"
 				} )
+				add( new FormComponent( "javax.swing.JCheckBox" ) {
+					name: "tallCompCheckBox"
+					"text": "tall component"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "tallCompChanged", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 0 5"
+				} )
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 2 0"
 			} )
@@ -600,7 +639,7 @@ new FormModel {
 			} )
 		}, new FormLayoutConstraints( null ) {
 			"location": new java.awt.Point( 0, 0 )
-			"size": new java.awt.Dimension( 960, 495 )
+			"size": new java.awt.Dimension( 960, 570 )
 		} )
 		add( new FormContainer( "javax.swing.JMenuBar", new FormLayoutManager( class javax.swing.JMenuBar ) ) {
 			name: "menuBar"
@@ -766,23 +805,23 @@ new FormModel {
 				} )
 			} )
 		}, new FormLayoutConstraints( null ) {
-			"location": new java.awt.Point( 0, 515 )
+			"location": new java.awt.Point( 0, 585 )
 			"size": new java.awt.Dimension( 255, 30 )
 		} )
 		add( new FormNonVisual( "javax.swing.ButtonGroup" ) {
 			name: "styleButtonGroup"
 		}, new FormLayoutConstraints( null ) {
-			"location": new java.awt.Point( 0, 565 )
+			"location": new java.awt.Point( 0, 635 )
 		} )
 		add( new FormNonVisual( "javax.swing.ButtonGroup" ) {
 			name: "iconButtonGroup"
 		}, new FormLayoutConstraints( null ) {
-			"location": new java.awt.Point( 0, 615 )
+			"location": new java.awt.Point( 0, 685 )
 		} )
 		add( new FormNonVisual( "javax.swing.ButtonGroup" ) {
 			name: "typeButtonGroup"
 		}, new FormLayoutConstraints( null ) {
-			"location": new java.awt.Point( 0, 669 )
+			"location": new java.awt.Point( 0, 740 )
 		} )
 	}
 }

gradle.properties

@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 
-flatlaf.releaseVersion     = 3.5
+flatlaf.releaseVersion     = 3.5.2
 flatlaf.developmentVersion = 3.6-SNAPSHOT
 
 org.gradle.parallel = true

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -15,6 +15,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 
 ##############################################################################
 #
@@ -55,7 +57,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -84,7 +86,8 @@ done
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
 # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum

gradlew.bat

@@ -13,6 +13,8 @@
 @rem See the License for the specific language governing permissions and
 @rem limitations under the License.
 @rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
 
 @if "%DEBUG%"=="" @echo off
 @rem ##########################################################################