Linux: rounded borders for popups (issue #949)

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

@@ -384,6 +384,7 @@ public interface FlatClientProperties
 	 *     If this value is {@code 1 - 4}, then {@code DWMWCP_ROUNDSMALL} is used.
 	 *     If it is {@code >= 5}, then {@code DWMWCP_ROUND} is used.
 	 * <li><strong>macOS</strong> (10.14 and later): Any corner radius is supported.
+	 * <li><strong>Linux</strong> (since FlatLaf 3.6): Any corner radius is supported.
 	 * </ul>
 	 * <strong>Component</strong> {@link javax.swing.JComponent}<br>
 	 * <strong>Value type</strong> {@link java.lang.Integer}<br>
@@ -402,6 +403,7 @@ public interface FlatClientProperties
 	 * Supported platforms:
 	 * <ul>
 	 * <li><strong>macOS</strong> (10.14 and later)
+	 * <li><strong>Linux</strong> (since FlatLaf 3.6)
 	 * </ul>
 	 * <strong>Component</strong> {@link javax.swing.JComponent}<br>
 	 * <strong>Value type</strong> {@link java.lang.Integer} or {@link java.lang.Float}<br>

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

@@ -25,6 +25,7 @@ import java.awt.Dimension;
 import java.awt.EventQueue;
 import java.awt.GraphicsConfiguration;
 import java.awt.GraphicsDevice;
+import java.awt.GraphicsDevice.WindowTranslucency;
 import java.awt.GraphicsEnvironment;
 import java.awt.Insets;
 import java.awt.MouseInfo;
@@ -117,8 +118,8 @@ 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 && isMacOSBorderSupported() )
+			if( popup.popupWindow != null && (isMacOSBorderSupported() || isLinuxBorderSupported( popup.popupWindow )) )
-				setupRoundedBorder( popup.popupWindow, owner, contents );
+				setupRoundedBorder( popup, popup.popupWindow, owner, contents );
 			return popup;
 		}
 
@@ -128,7 +129,7 @@ public class FlatPopupFactory
 		{
 			NonFlashingPopup popup = new NonFlashingPopup( getPopupForScreenOfOwner( owner, contents, x, y, true ), owner, contents );
 			if( popup.popupWindow != null )
-				setupRoundedBorder( popup.popupWindow, owner, contents );
+				setupRoundedBorder( popup, popup.popupWindow, owner, contents );
 			return popup;
 		}
 
@@ -370,7 +371,15 @@ public class FlatPopupFactory
 			FlatNativeMacLibrary.isLoaded();
 	}
 
-	private static void setupRoundedBorder( Window popupWindow, Component owner, Component contents ) {
+	private static boolean isLinuxBorderSupported( Window window ) {
+		return SystemInfo.isLinux &&
+			FlatSystemProperties.getBoolean( FlatSystemProperties.USE_ROUNDED_POPUP_BORDER, true ) &&
+			window.getGraphicsConfiguration().getDevice().isWindowTranslucencySupported( WindowTranslucency.PERPIXEL_TRANSPARENT );
+	}
+
+	private static void setupRoundedBorder( NonFlashingPopup popup,
+		Window popupWindow, Component owner, Component contents )
+	{
 		int borderCornerRadius = getBorderCornerRadius( owner, contents );
 		float borderWidth = getRoundedBorderWidth( owner, contents );
 
@@ -397,7 +406,7 @@ public class FlatPopupFactory
 
 		if( popupWindow.isDisplayable() ) {
 			// native window already created
-			setupRoundedBorderImpl( popupWindow, borderCornerRadius, borderWidth, borderColor );
+			setupRoundedBorderImpl( popup, popupWindow, borderCornerRadius, borderWidth, borderColor );
 		} else {
 			// native window not yet created --> add listener to set native border after window creation
 			AtomicReference<HierarchyListener> l = new AtomicReference<>();
@@ -405,7 +414,7 @@ public class FlatPopupFactory
 				if( e.getID() == HierarchyEvent.HIERARCHY_CHANGED &&
 					(e.getChangeFlags() & HierarchyEvent.DISPLAYABILITY_CHANGED) != 0 )
 				{
-					setupRoundedBorderImpl( popupWindow, borderCornerRadius, borderWidth, borderColor );
+					setupRoundedBorderImpl( popup, popupWindow, borderCornerRadius, borderWidth, borderColor );
 					popupWindow.removeHierarchyListener( l.get() );
 				}
 			} );
@@ -413,7 +422,9 @@ public class FlatPopupFactory
 		}
 	}
 
-	private static void setupRoundedBorderImpl( Window popupWindow, int borderCornerRadius, float borderWidth, Color borderColor ) {
+	private static void setupRoundedBorderImpl( NonFlashingPopup popup,
+		Window popupWindow, int borderCornerRadius, float borderWidth, Color borderColor )
+	{
 		if( SystemInfo.isWindows ) {
 			// get native window handle
 			long hwnd = FlatNativeWindowsLibrary.getHWND( popupWindow );
@@ -433,6 +444,12 @@ public class FlatPopupFactory
 			// set corner radius, border width and color
 			FlatNativeMacLibrary.setWindowRoundedBorder( popupWindow, borderCornerRadius,
 				borderWidth, (borderColor != null) ? borderColor.getRGB() : 0 );
+		} else if( SystemInfo.isLinux ) {
+			if( popupWindow instanceof RootPaneContainer ) {
+				popup.windowRoundedBorder = new FlatWindowRoundedBorder(
+					((RootPaneContainer)popupWindow).getRootPane(),
+					borderCornerRadius, borderWidth, borderColor );
+			}
 		}
 	}
 
@@ -465,7 +482,7 @@ public class FlatPopupFactory
 			"Popup.roundedBorderWidth";
 
 		Object value = getOption( owner, contents, FlatClientProperties.POPUP_ROUNDED_BORDER_WIDTH, uiKey );
-		return (value instanceof Number) ? ((Number)value).floatValue() : 0;
+		return (value instanceof Number) ? ((Number)value).floatValue() : 1;
 	}
 
 	//---- fixes --------------------------------------------------------------
@@ -578,6 +595,7 @@ public class FlatPopupFactory
 		// heavy weight
 		Window popupWindow;
 		private Color oldPopupWindowBackground;
+		private FlatWindowRoundedBorder windowRoundedBorder;
 
 		private boolean disposed;
 
@@ -603,6 +621,7 @@ public class FlatPopupFactory
 			contents = reusePopup.contents;
 			popupWindow = reusePopup.popupWindow;
 			oldPopupWindowBackground = reusePopup.oldPopupWindowBackground;
+			windowRoundedBorder = reusePopup.windowRoundedBorder;
 		}
 
 		NonFlashingPopup cloneForReuse() {
@@ -674,6 +693,11 @@ public class FlatPopupFactory
 				contents = null;
 			}
 
+			if( windowRoundedBorder != null ) {
+				windowRoundedBorder.uninstall();
+				windowRoundedBorder = null;
+			}
+
 			if( popupWindow != null ) {
 				// restore background so that it can not affect other LaFs (when switching)
 				// because popup windows are cached and reused

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

@@ -411,7 +411,8 @@ public class FlatUIUtils
 		GraphicsConfiguration gc = c.getGraphicsConfiguration();
 		GraphicsDevice gd = (gc != null) ? gc.getDevice() : null;
 		Window fullScreenWindow = (gd != null) ? gd.getFullScreenWindow() : null;
-		return (fullScreenWindow != null && fullScreenWindow == SwingUtilities.windowForComponent( c ));
+		return (fullScreenWindow != null &&
+			(fullScreenWindow == c || fullScreenWindow == SwingUtilities.windowForComponent( c )));
 	}
 
 	public static Boolean isRoundRect( Component c ) {

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

@@ -0,0 +1,361 @@
+/*
+ * Copyright 2025 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import static javax.swing.SwingConstants.*;
+import java.awt.Color;
+import java.awt.Container;
+import java.awt.Frame;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.IllegalComponentStateException;
+import java.awt.Shape;
+import java.awt.Window;
+import java.awt.event.ComponentEvent;
+import java.awt.event.ComponentListener;
+import java.awt.geom.Area;
+import java.awt.geom.Path2D;
+import java.awt.geom.Rectangle2D;
+import java.awt.geom.RoundRectangle2D;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
+import javax.swing.JComponent;
+import javax.swing.JLayeredPane;
+import javax.swing.JRootPane;
+import com.formdev.flatlaf.util.UIScale;
+
+/**
+ * Rounded border for {@link Window}.
+ * Used for popups and for FlatLaf window decorations.
+ * <p>
+ * Border is painted only if window is not maximized (in both directions) and
+ * not in full screen mode. If maximized in one direction (vertically or horizontally),
+ * then a square border is painted.
+ * <p>
+ * Note: The rootpane of the window should have a {@link FlatEmptyBorder} with
+ *       same insets as border width used in this class.
+ *
+ * @author Karl Tauber
+ * @since 3.6
+ */
+public class FlatWindowRoundedBorder
+	implements PropertyChangeListener, ComponentListener
+{
+	protected final JRootPane rootPane;
+	protected final int borderCornerRadius;
+	protected final float borderWidth;
+	protected final Color borderColor;
+
+	protected final Shape cornerShape;
+
+	// edges
+	protected final RoundedBorderComponent northComp;
+	protected final RoundedBorderComponent southComp;
+	protected final RoundedBorderComponent westComp;
+	protected final RoundedBorderComponent eastComp;
+
+	// corners
+	protected final RoundedBorderComponent northWestComp;
+	protected final RoundedBorderComponent northEastComp;
+	protected final RoundedBorderComponent southWestComp;
+	protected final RoundedBorderComponent southEastComp;
+
+	protected Window window;
+	protected boolean windowIsRounded;
+
+	public FlatWindowRoundedBorder( JRootPane rootPane, int borderCornerRadius,
+		float borderWidth, Color borderColor )
+	{
+		this.rootPane = rootPane;
+		this.borderCornerRadius = borderCornerRadius;
+		this.borderWidth = borderWidth;
+		this.borderColor = borderColor;
+
+		// create shape used to paint rounded corners
+		cornerShape = createCornerShape();
+
+		// create edges
+		northComp = new RoundedBorderComponent( NORTH );
+		southComp = new RoundedBorderComponent( SOUTH );
+		westComp  = new RoundedBorderComponent( WEST );
+		eastComp  = new RoundedBorderComponent( EAST );
+
+		// create corners
+		northWestComp = new RoundedBorderComponent( NORTH_WEST );
+		northEastComp = new RoundedBorderComponent( NORTH_EAST );
+		southWestComp = new RoundedBorderComponent( SOUTH_WEST );
+		southEastComp = new RoundedBorderComponent( SOUTH_EAST );
+
+		// insert before layered pane
+		int insertIndex = rootPane.getComponentCount() - 1;
+		JLayeredPane layeredPane = rootPane.getLayeredPane();
+		for( int i = insertIndex; i >= 0; i-- ) {
+			if( rootPane.getComponent( insertIndex ) == layeredPane )
+				break;
+		}
+
+		// add edges
+		rootPane.add( northComp, insertIndex++ );
+		rootPane.add( southComp, insertIndex++ );
+		rootPane.add( westComp,  insertIndex++ );
+		rootPane.add( eastComp,  insertIndex++ );
+
+		// add corners
+		rootPane.add( northWestComp, insertIndex++ );
+		rootPane.add( northEastComp, insertIndex++ );
+		rootPane.add( southWestComp, insertIndex++ );
+		rootPane.add( southEastComp, insertIndex++ );
+
+		// add listeners
+		rootPane.addComponentListener( this );
+		rootPane.addPropertyChangeListener( "ancestor", this );
+
+		if( rootPane.isDisplayable() )
+			addNotify();
+		else
+			updateVisibility();
+	}
+
+	public void uninstall() {
+		removeNotify();
+
+		// remove listeners
+		rootPane.removeComponentListener( this );
+		rootPane.removePropertyChangeListener( "ancestor", this );
+
+		// remove edges
+		rootPane.remove( northComp );
+		rootPane.remove( southComp );
+		rootPane.remove( westComp );
+		rootPane.remove( eastComp );
+
+		// remove corners
+		rootPane.remove( northWestComp );
+		rootPane.remove( northEastComp );
+		rootPane.remove( southWestComp );
+		rootPane.remove( southEastComp );
+	}
+
+	public void doLayout() {
+		if( !northComp.isVisible() )
+			return;
+
+		int x = 0;
+		int y = 0;
+		int width = rootPane.getWidth();
+		int height = rootPane.getHeight();
+		if( width <= 0 || height <= 0 )
+			return;
+
+		// for layout, round-up scaled border width and radius to ensure that components are large enough
+		int lineWidth = (int) Math.ceil( UIScale.scale( borderWidth ) );
+		int cornerSize = (windowIsRounded && lineWidth > 0)
+			? (int) Math.ceil( UIScale.scale( (float) borderCornerRadius ) )
+			: 0;
+		int cornerSize2x = cornerSize * 2;
+
+		// edges
+		northComp.setBounds( x + cornerSize, y, width - cornerSize2x, lineWidth );
+		southComp.setBounds( x + cornerSize, y + height - lineWidth, width - cornerSize2x, lineWidth );
+		westComp.setBounds( x, y + cornerSize, lineWidth, height - cornerSize2x );
+		eastComp.setBounds( x + width - lineWidth, y + cornerSize, lineWidth, height - cornerSize2x );
+
+		// corners
+		northWestComp.setBounds( x, y, cornerSize, cornerSize );
+		northEastComp.setBounds( x + width - cornerSize, y, cornerSize, cornerSize );
+		southWestComp.setBounds( x, y + height - cornerSize, cornerSize, cornerSize );
+		southEastComp.setBounds( x + width - cornerSize, y + height - cornerSize, cornerSize, cornerSize );
+	}
+
+	protected void addNotify() {
+		Container parent = rootPane.getParent();
+		window = (parent instanceof Window) ? (Window) parent : null;
+
+		updateVisibility();
+		updateWindowShape();
+		doLayout();
+	}
+
+	protected void removeNotify() {
+		if( window != null ) {
+			window.setShape( null );
+			window = null;
+		}
+
+		updateVisibility();
+	}
+
+	protected void updateVisibility() {
+		boolean visible = needsBorder();
+		if( visible == northComp.isVisible() )
+			return;
+
+		// edges
+		northComp.setVisible( visible );
+		southComp.setVisible( visible );
+		westComp.setVisible( visible );
+		eastComp.setVisible( visible );
+
+		// corners
+		northWestComp.setVisible( visible );
+		northEastComp.setVisible( visible );
+		southWestComp.setVisible( visible );
+		southEastComp.setVisible( visible );
+	}
+
+	protected boolean needsBorder() {
+		if( window == null || FlatUIUtils.isFullScreen( window ) )
+			return false;
+		if( window instanceof Frame )
+			return (((Frame)window).getExtendedState() & Frame.MAXIMIZED_BOTH) != Frame.MAXIMIZED_BOTH;
+		return true;
+	}
+
+	protected void updateWindowShape() {
+		windowIsRounded = false;
+
+		if( window == null )
+			return;
+
+		if( !northComp.isVisible() ||
+			(window instanceof Frame && (((Frame)window).getExtendedState() & Frame.MAXIMIZED_BOTH) != 0) )
+		{
+			window.setShape( null );
+			return;
+		}
+
+		int arc = UIScale.scale( borderCornerRadius * 2 );
+
+		// use a slightly smaller arc for the shape so that at least parts of
+		// the antialiased arc outside are shown
+		arc -= 2;
+
+		if( arc > 0 ) {
+			try {
+				window.setShape( new RoundRectangle2D.Float( 0, 0,
+					rootPane.getWidth(), rootPane.getHeight(), arc, arc ) );
+				windowIsRounded = true;
+			} catch( IllegalComponentStateException | UnsupportedOperationException ex ) {
+				window.setShape( null );
+			}
+		} else
+			window.setShape( null );
+	}
+
+	protected Shape createCornerShape() {
+		float lineWidth = UIScale.scale( borderWidth );
+		int arc = UIScale.scale( borderCornerRadius * 2 );
+		int wh = arc * 3;
+		float innerArc = arc - (lineWidth * 2);
+		float innerWH = wh - (lineWidth * 2);
+
+		Path2D path = new Path2D.Float( Path2D.WIND_EVEN_ODD );
+		path.append( new RoundRectangle2D.Float( 0, 0, wh, wh, arc, arc ), false );
+		path.append( new RoundRectangle2D.Float( lineWidth, lineWidth, innerWH, innerWH, innerArc, innerArc ), false );
+
+		Area area = new Area( path );
+		int cornerSize = (int) Math.ceil( UIScale.scale( (float) borderCornerRadius ) );
+		area.intersect( new Area( new Rectangle2D.Float( 0, 0, cornerSize, cornerSize ) ) );
+		return area;
+	}
+
+	//---- interface PropertyChangeListener ----
+
+	@Override
+	public void propertyChange( PropertyChangeEvent e ) {
+		switch( e.getPropertyName() ) {
+			case "ancestor":
+				if( e.getNewValue() != null )
+					addNotify();
+				else
+					removeNotify();
+				break;
+		}
+	}
+
+	//---- interface ComponentListener ----
+
+	@Override
+	public void componentResized( ComponentEvent e ) {
+		updateVisibility();
+		updateWindowShape();
+		doLayout();
+	}
+
+	@Override public void componentMoved( ComponentEvent e ) {}
+	@Override public void componentShown( ComponentEvent e ) {}
+	@Override public void componentHidden( ComponentEvent e ) {}
+
+	//---- class RoundedBorderComponent ---------------------------------------
+
+	protected class RoundedBorderComponent
+		extends JComponent
+	{
+		private final int position;
+
+		protected RoundedBorderComponent( int position ) {
+			this.position = position;
+		}
+
+		@Override
+		public void paint( Graphics g ) {
+			Graphics2D g2 = (Graphics2D) g;
+			int width = getWidth();
+			int height = getHeight();
+			float lineWidth = UIScale.scale( borderWidth );
+
+/*debug
+			g.setColor( java.awt.Color.green );
+			g.drawRect( 0, 0, width - 1, height - 1 );
+debug*/
+
+			Object[] oldRenderingHints = FlatUIUtils.setRenderingHints( g );
+
+			g.setColor( borderColor );
+			switch( position ) {
+				case NORTH: g2.fill( new Rectangle2D.Float( 0, 0, width, lineWidth ) ); break;
+				case SOUTH: g2.fill( new Rectangle2D.Float( 0, height - lineWidth, width, lineWidth ) ); break;
+				case WEST:  g2.fill( new Rectangle2D.Float( 0, 0, lineWidth, height ) ); break;
+				case EAST:  g2.fill( new Rectangle2D.Float( width - lineWidth, 0, lineWidth, height ) ); break;
+
+				case NORTH_WEST:
+					g2.fill( cornerShape );
+					break;
+
+				case NORTH_EAST:
+					g2.translate( width, 0 );
+					g2.rotate( Math.toRadians( 90 ) );
+					g2.fill( cornerShape );
+					break;
+
+				case SOUTH_WEST:
+					g2.translate( 0, height );
+					g2.rotate( Math.toRadians( -90 ) );
+					g2.fill( cornerShape );
+					break;
+
+				case SOUTH_EAST:
+					g2.translate( width, height );
+					g2.rotate( Math.toRadians( 180 ) );
+					g2.fill( cornerShape );
+					break;
+			}
+
+			FlatUIUtils.resetRenderingHints( g, oldRenderingHints );
+		}
+	}
+}

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

@@ -246,7 +246,6 @@ PasswordField.revealIconColor = @foreground
 
 #---- Popup ----
 
-[mac]Popup.roundedBorderWidth = 1
 Popup.dropShadowColor = #000
 Popup.dropShadowOpacity = 0.25
 

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

@@ -289,7 +289,7 @@ ComboBox.popupInsets = 0,0,0,0
 ComboBox.selectionInsets = 0,0,0,0
 ComboBox.selectionArc = 0
 ComboBox.borderCornerRadius = $Popup.borderCornerRadius
-[mac]ComboBox.roundedBorderWidth = $Popup.roundedBorderWidth
+ComboBox.roundedBorderWidth = $Popup.roundedBorderWidth
 
 
 #---- Component ----
@@ -506,7 +506,7 @@ PasswordField.revealIcon = com.formdev.flatlaf.icons.FlatRevealIcon
 #---- Popup ----
 
 Popup.borderCornerRadius = 4
-[mac]Popup.roundedBorderWidth = 0
+Popup.roundedBorderWidth = 1
 Popup.dropShadowPainted = true
 Popup.dropShadowInsets = -4,-4,4,4
 
@@ -516,7 +516,7 @@ Popup.dropShadowInsets = -4,-4,4,4
 PopupMenu.border = com.formdev.flatlaf.ui.FlatPopupMenuBorder
 PopupMenu.borderInsets = 4,1,4,1
 PopupMenu.borderCornerRadius = $Popup.borderCornerRadius
-[mac]PopupMenu.roundedBorderWidth = $Popup.roundedBorderWidth
+PopupMenu.roundedBorderWidth = $Popup.roundedBorderWidth
 PopupMenu.background = @menuBackground
 PopupMenu.scrollArrowColor = @buttonArrowColor
 
@@ -913,7 +913,7 @@ ToolTipManager.enableToolTipMode = activeApplication
 #---- ToolTip ----
 
 ToolTip.borderCornerRadius = $Popup.borderCornerRadius
-[mac]ToolTip.roundedBorderWidth = $Popup.roundedBorderWidth
+ToolTip.roundedBorderWidth = $Popup.roundedBorderWidth
 
 
 #---- Tree ----

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

@@ -253,6 +253,7 @@ PasswordField.revealIconColor = tint(@foreground,40%)
 
 #---- Popup ----
 
+[mac]Popup.roundedBorderWidth = 0
 Popup.dropShadowColor = #000
 Popup.dropShadowOpacity = 0.15
 

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

@@ -1,12 +1,11 @@
 - Java   1.8.0_202
-+ Java   1.8.0_292
++ Java   1.8.0_322
 
 - OS     Windows 10
 + OS     Mac OS X
 
 #---- ComboBox ----
 
-+ ComboBox.roundedBorderWidth    1
 + ComboBox.showPopupOnNavigation true
 
 
@@ -47,16 +46,6 @@
 + OptionPane.isYesLast           true
 
 
-#---- Popup ----
-
-+ Popup.roundedBorderWidth       1
-
-
-#---- PopupMenu ----
-
-+ PopupMenu.roundedBorderWidth   1
-
-
 #---- ProgressBar ----
 
 - ProgressBar.font               [active] Segoe UI plain 10    javax.swing.plaf.FontUIResource [UI]
@@ -88,11 +77,6 @@
 
 - TitlePane.small.font           [active] Segoe UI plain 11    javax.swing.plaf.FontUIResource [UI]
 + TitlePane.small.font           [active] Helvetica Neue plain 12    javax.swing.plaf.FontUIResource [UI]
-
-
-#---- ToolTip ----
-
-+ ToolTip.roundedBorderWidth     1
 - defaultFont                    Segoe UI plain 12    javax.swing.plaf.FontUIResource [UI]
 + defaultFont                    Helvetica Neue plain 13    javax.swing.plaf.FontUIResource [UI]
 

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

@@ -222,6 +222,7 @@ ComboBox.minimumWidth          72
 ComboBox.noActionOnKeyNavigation false
 ComboBox.padding               2,6,2,6    javax.swing.plaf.InsetsUIResource [UI]
 ComboBox.popupInsets           0,0,0,0    javax.swing.plaf.InsetsUIResource [UI]
+ComboBox.roundedBorderWidth    1
 ComboBox.selectionArc          0
 ComboBox.selectionBackground   #4b6eaf  HSL 219  40  49    javax.swing.plaf.ColorUIResource [UI]
 ComboBox.selectionForeground   #bbbbbb  HSL   0   0  73    javax.swing.plaf.ColorUIResource [UI]
@@ -744,6 +745,7 @@ Popup.dropShadowColor          #000000  HSL   0   0   0    javax.swing.plaf.Colo
 Popup.dropShadowInsets         -4,-4,4,4    javax.swing.plaf.InsetsUIResource [UI]
 Popup.dropShadowOpacity        0.25
 Popup.dropShadowPainted        true
+Popup.roundedBorderWidth       1
 
 
 #---- PopupMenu ----
@@ -757,6 +759,7 @@ PopupMenu.consumeEventOnClose  false
 PopupMenu.font                 [active] $defaultFont [UI]
 PopupMenu.foreground           #bbbbbb  HSL   0   0  73    javax.swing.plaf.ColorUIResource [UI]
 PopupMenu.hoverScrollArrowBackground #484c4e  HSL 200   4  29    javax.swing.plaf.ColorUIResource [UI]
+PopupMenu.roundedBorderWidth   1
 PopupMenu.scrollArrowColor     #9b9b9b  HSL   0   0  61    javax.swing.plaf.ColorUIResource [UI]
 
 
@@ -1375,6 +1378,7 @@ ToolTip.border                 [lazy] 4,6,4,6  false    com.formdev.flatlaf.ui.F
 ToolTip.borderCornerRadius     4
 ToolTip.font                   [active] $defaultFont [UI]
 ToolTip.foreground             #bbbbbb  HSL   0   0  73    javax.swing.plaf.ColorUIResource [UI]
+ToolTip.roundedBorderWidth     1
 
 
 #---- ToolTipManager ----

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

@@ -1,12 +1,14 @@
 - Java   1.8.0_202
-+ Java   1.8.0_292
++ Java   1.8.0_322
 
 - OS     Windows 10
 + OS     Mac OS X
 
 #---- ComboBox ----
 
+- ComboBox.roundedBorderWidth    1
 + ComboBox.roundedBorderWidth    0
+
 + ComboBox.showPopupOnNavigation true
 
 
@@ -49,11 +51,13 @@
 
 #---- Popup ----
 
+- Popup.roundedBorderWidth       1
 + Popup.roundedBorderWidth       0
 
 
 #---- PopupMenu ----
 
+- PopupMenu.roundedBorderWidth   1
 + PopupMenu.roundedBorderWidth   0
 
 
@@ -92,6 +96,7 @@
 
 #---- ToolTip ----
 
+- ToolTip.roundedBorderWidth     1
 + ToolTip.roundedBorderWidth     0
 - defaultFont                    Segoe UI plain 12    javax.swing.plaf.FontUIResource [UI]
 + defaultFont                    Helvetica Neue plain 13    javax.swing.plaf.FontUIResource [UI]

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

@@ -226,6 +226,7 @@ ComboBox.minimumWidth          72
 ComboBox.noActionOnKeyNavigation false
 ComboBox.padding               2,6,2,6    javax.swing.plaf.InsetsUIResource [UI]
 ComboBox.popupInsets           0,0,0,0    javax.swing.plaf.InsetsUIResource [UI]
+ComboBox.roundedBorderWidth    1
 ComboBox.selectionArc          0
 ComboBox.selectionBackground   #2675bf  HSL 209  67  45    javax.swing.plaf.ColorUIResource [UI]
 ComboBox.selectionForeground   #ffffff  HSL   0   0 100    javax.swing.plaf.ColorUIResource [UI]
@@ -749,6 +750,7 @@ Popup.dropShadowColor          #000000  HSL   0   0   0    javax.swing.plaf.Colo
 Popup.dropShadowInsets         -4,-4,4,4    javax.swing.plaf.InsetsUIResource [UI]
 Popup.dropShadowOpacity        0.15
 Popup.dropShadowPainted        true
+Popup.roundedBorderWidth       1
 
 
 #---- PopupMenu ----
@@ -762,6 +764,7 @@ PopupMenu.consumeEventOnClose  false
 PopupMenu.font                 [active] $defaultFont [UI]
 PopupMenu.foreground           #000000  HSL   0   0   0    javax.swing.plaf.ColorUIResource [UI]
 PopupMenu.hoverScrollArrowBackground #e5e5e5  HSL   0   0  90    javax.swing.plaf.ColorUIResource [UI]
+PopupMenu.roundedBorderWidth   1
 PopupMenu.scrollArrowColor     #666666  HSL   0   0  40    javax.swing.plaf.ColorUIResource [UI]
 
 
@@ -1380,6 +1383,7 @@ ToolTip.border                 [lazy] 4,6,4,6  false    com.formdev.flatlaf.ui.F
 ToolTip.borderCornerRadius     4
 ToolTip.font                   [active] $defaultFont [UI]
 ToolTip.foreground             #000000  HSL   0   0   0    javax.swing.plaf.ColorUIResource [UI]
+ToolTip.roundedBorderWidth     1
 
 
 #---- ToolTipManager ----

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

@@ -228,6 +228,7 @@ ComboBox.noActionOnKeyNavigation false
 ComboBox.padding               2,6,2,6    javax.swing.plaf.InsetsUIResource [UI]
 ComboBox.popupBackground       #323232  HSL   0   0  20    javax.swing.plaf.ColorUIResource [UI]
 ComboBox.popupInsets           5,0,5,0    javax.swing.plaf.InsetsUIResource [UI]
+ComboBox.roundedBorderWidth    1
 ComboBox.selectionArc          8
 ComboBox.selectionBackground   #1458b8  HSL 215  80  40    javax.swing.plaf.ColorUIResource [UI]
 ComboBox.selectionForeground   #ffffff  HSL   0   0 100    javax.swing.plaf.ColorUIResource [UI]
@@ -752,6 +753,7 @@ Popup.dropShadowColor          #000000  HSL   0   0   0    javax.swing.plaf.Colo
 Popup.dropShadowInsets         -4,-4,4,4    javax.swing.plaf.InsetsUIResource [UI]
 Popup.dropShadowOpacity        0.25
 Popup.dropShadowPainted        true
+Popup.roundedBorderWidth       1
 
 
 #---- PopupMenu ----
@@ -765,6 +767,7 @@ PopupMenu.consumeEventOnClose  false
 PopupMenu.font                 [active] $defaultFont [UI]
 PopupMenu.foreground           #dddddd  HSL   0   0  87    javax.swing.plaf.ColorUIResource [UI]
 PopupMenu.hoverScrollArrowBackground #2b2b2b  HSL   0   0  17    javax.swing.plaf.ColorUIResource [UI]
+PopupMenu.roundedBorderWidth   1
 PopupMenu.scrollArrowColor     #b7b7b7  HSL   0   0  72    javax.swing.plaf.ColorUIResource [UI]
 
 
@@ -1385,6 +1388,7 @@ ToolTip.border                 [lazy] 4,6,4,6  false    com.formdev.flatlaf.ui.F
 ToolTip.borderCornerRadius     4
 ToolTip.font                   [active] $defaultFont [UI]
 ToolTip.foreground             #dddddd  HSL   0   0  87    javax.swing.plaf.ColorUIResource [UI]
+ToolTip.roundedBorderWidth     1
 
 
 #---- ToolTipManager ----

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

@@ -232,6 +232,7 @@ ComboBox.noActionOnKeyNavigation false
 ComboBox.padding               2,6,2,6    javax.swing.plaf.InsetsUIResource [UI]
 ComboBox.popupBackground       #ececec  HSL   0   0  93    javax.swing.plaf.ColorUIResource [UI]
 ComboBox.popupInsets           5,0,5,0    javax.swing.plaf.InsetsUIResource [UI]
+ComboBox.roundedBorderWidth    1
 ComboBox.selectionArc          8
 ComboBox.selectionBackground   #3d9aff  HSL 211 100  62    javax.swing.plaf.ColorUIResource [UI]
 ComboBox.selectionForeground   #ffffff  HSL   0   0 100    javax.swing.plaf.ColorUIResource [UI]
@@ -756,6 +757,7 @@ Popup.dropShadowColor          #000000  HSL   0   0   0    javax.swing.plaf.Colo
 Popup.dropShadowInsets         -4,-4,4,4    javax.swing.plaf.InsetsUIResource [UI]
 Popup.dropShadowOpacity        0.15
 Popup.dropShadowPainted        true
+Popup.roundedBorderWidth       1
 
 
 #---- PopupMenu ----
@@ -769,6 +771,7 @@ PopupMenu.consumeEventOnClose  false
 PopupMenu.font                 [active] $defaultFont [UI]
 PopupMenu.foreground           #262626  HSL   0   0  15    javax.swing.plaf.ColorUIResource [UI]
 PopupMenu.hoverScrollArrowBackground #e9e9e9  HSL   0   0  91    javax.swing.plaf.ColorUIResource [UI]
+PopupMenu.roundedBorderWidth   1
 PopupMenu.scrollArrowColor     #7d7d7d  HSL   0   0  49    javax.swing.plaf.ColorUIResource [UI]
 
 
@@ -1389,6 +1392,7 @@ ToolTip.border                 [lazy] 4,6,4,6  false    com.formdev.flatlaf.ui.F
 ToolTip.borderCornerRadius     4
 ToolTip.font                   [active] $defaultFont [UI]
 ToolTip.foreground             #262626  HSL   0   0  15    javax.swing.plaf.ColorUIResource [UI]
+ToolTip.roundedBorderWidth     1
 
 
 #---- ToolTipManager ----

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

@@ -254,6 +254,7 @@ ComboBox.noActionOnKeyNavigation false
 ComboBox.padding               2,6,2,6    javax.swing.plaf.InsetsUIResource [UI]
 ComboBox.popupBackground       #ffffcc  HSL  60 100  90    javax.swing.plaf.ColorUIResource [UI]
 ComboBox.popupInsets           0,0,0,0    javax.swing.plaf.InsetsUIResource [UI]
+ComboBox.roundedBorderWidth    1
 ComboBox.selectionArc          0
 ComboBox.selectionBackground   #00aa00  HSL 120 100  33    javax.swing.plaf.ColorUIResource [UI]
 ComboBox.selectionForeground   #ffff00  HSL  60 100  50    javax.swing.plaf.ColorUIResource [UI]
@@ -782,6 +783,7 @@ Popup.dropShadowColor          #00ff00  HSL 120 100  50    javax.swing.plaf.Colo
 Popup.dropShadowInsets         -6,6,6,6    javax.swing.plaf.InsetsUIResource [UI]
 Popup.dropShadowOpacity        0.5
 Popup.dropShadowPainted        true
+Popup.roundedBorderWidth       1
 
 
 #---- PopupMenu ----
@@ -795,6 +797,7 @@ PopupMenu.consumeEventOnClose  false
 PopupMenu.font                 [active] $defaultFont [UI]
 PopupMenu.foreground           #ff0000  HSL   0 100  50    javax.swing.plaf.ColorUIResource [UI]
 PopupMenu.hoverScrollArrowBackground #00ff00  HSL 120 100  50    javax.swing.plaf.ColorUIResource [UI]
+PopupMenu.roundedBorderWidth   1
 PopupMenu.scrollArrowColor     #0000ff  HSL 240 100  50    javax.swing.plaf.ColorUIResource [UI]
 
 
@@ -1438,6 +1441,7 @@ ToolTip.border                 [lazy] line: #000000  HSL   0   0   0    java.awt
 ToolTip.borderCornerRadius     4
 ToolTip.font                   [active] $defaultFont [UI]
 ToolTip.foreground             #ff0000  HSL   0 100  50    javax.swing.plaf.ColorUIResource [UI]
+ToolTip.roundedBorderWidth     1
 
 
 #---- ToolTipManager ----