8271328: User is able to choose the color after disabling the color chooser.

src/java.desktop/share/classes/com/sun/java/swing/plaf/gtk/GTKColorChooserPanel.java

@@ -104,6 +104,20 @@ static void compositeRequestFocus(Component component, boolean direction) {
         component.requestFocus();
     }
 
+    @Override
+    public void setEnabled(boolean enabled) {
+        super.setEnabled(enabled);
+        setEnabled(this, enabled);
+    }
+
+    private static void setEnabled(Container container, boolean enabled) {
+        for (Component component : container.getComponents()) {
+            component.setEnabled(enabled);
+            if (component instanceof Container) {
+                setEnabled((Container) component, enabled);
+            }
+        }
+    }
 
     /**
      * Returns a user presentable description of this GTKColorChooserPane.
@@ -674,6 +688,11 @@ int getColorY() {
         }
 
         protected void processEvent(AWTEvent e) {
+
+            if (!(getGTKColorChooserPanel().isEnabled())) {
+                return;
+            }
+
             if (e.getID() == MouseEvent.MOUSE_PRESSED ||
                    ((isSet(FLAGS_DRAGGING) ||isSet(FLAGS_DRAGGING_TRIANGLE)) &&
                    e.getID() == MouseEvent.MOUSE_DRAGGED)) {

test/jdk/javax/swing/JColorChooser/TestDisabledColorChooser.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8271328
+ * @key headful
+ * @requires (os.family == "linux")
+ * @summary Verifies if user is not able to select color from disabled ColorChooser
+ * @run main TestDisabledColorChooser
+ */
+
+import java.awt.Color;
+import java.awt.event.InputEvent;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
+import java.awt.Point;
+import java.awt.Robot;
+import javax.swing.JColorChooser;
+import javax.swing.JFrame;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+
+public class TestDisabledColorChooser  {
+    private static JFrame frame;
+    private static JColorChooser Colorchooser;
+
+    public TestDisabledColorChooser() {
+        createAndShowUI();
+    }
+
+    public static void main(String[] args) throws Exception {
+        UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");
+        Robot robot = new Robot();
+        robot.setAutoDelay(100);
+        try {
+            SwingUtilities.invokeAndWait(() -> {
+                new TestDisabledColorChooser();
+            });
+
+            robot.waitForIdle();
+            robot.delay(1000);
+
+            Point pt = frame.getLocationOnScreen();
+            robot.mouseMove(pt.x+75, pt.y+frame.getHeight()/2);
+            robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+            robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+            Color c1 = Colorchooser.getColor();
+
+            Colorchooser.setEnabled(false);
+            robot.mouseMove(pt.x+85, pt.y+frame.getHeight()/2);
+            robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
+            robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
+            Color c2 = Colorchooser.getColor();
+            robot.delay(1000);
+
+            if (c1.getRGB() != c2.getRGB())
+                throw new RuntimeException("User is able to select color after disabling ColorChooser");
+            else
+                System.out.println("passed");
+        } finally {
+            SwingUtilities.invokeAndWait(() -> {
+                if (frame != null) {
+                    frame.dispose();
+                }
+            });
+        }
+    }
+
+    private void createAndShowUI() {
+        frame = new JFrame("Test Disabled ColorChooser Color Selection");
+        Colorchooser = new JColorChooser();
+        frame.add(Colorchooser);
+        frame.pack();
+        frame.setLocationRelativeTo(null);
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        frame.setVisible(true);
+    }
+}