From e8ee037d09e3ec013e83dcb5145e4823f0c736b1 Mon Sep 17 00:00:00 2001
From: Karl Tauber <karl@jformdesigner.com>
Date: Mon, 10 Jan 2022 11:58:49 +0100
Subject: [PATCH] RootPane: uninstall background, foreground and font because
 not all Lafs set them

---
 .../java/com/formdev/flatlaf/ui/FlatRootPaneUI.java | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatRootPaneUI.java b/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatRootPaneUI.java
index 61569936..649da315 100644
--- a/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatRootPaneUI.java
+++ b/flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatRootPaneUI.java
@@ -161,6 +161,19 @@ public class FlatRootPaneUI
 			c.putClientProperty( "jetbrains.awt.windowDarkAppearance", FlatLaf.isLafDark() );
 	}
 
+	@Override
+	protected void uninstallDefaults( JRootPane c ) {
+		super.uninstallDefaults( c );
+
+		// uninstall background, foreground and font because not all Lafs set them
+		if( c.isBackgroundSet() && c.getBackground() instanceof UIResource )
+			c.setBackground( null );
+		if( c.isForegroundSet() && c.getForeground() instanceof UIResource )
+			c.setForeground( null );
+		if( c.isFontSet() && c.getFont() instanceof UIResource )
+			c.setFont( null );
+	}
+
 	@Override
 	protected void installListeners( JRootPane root ) {
 		super.installListeners( root );