GlassPane becomes inactive after clicking JInternalPane's resize border

Question

Hi all,
I wrote a program which has a JFrame with a JDesktopPane on it's content pane.
Then I add two JInternalFrames on the desktop pane, and my own glass pane by JFrame's setGlassPane() method.
In my glass pane, I intercept all mouse events for the glass pane and If the event comes up NOT on the JDesktopPane, I convert and forward the event to component beneath the glass pane.
This almost works fine except two problems.
One is that once I pressed mouse button on the resize border of a JInternalFrame, the glass pane stops forwading event. It seems to become inactive.
Second, if I move mouse cursor on the JinternalFrame's resize-border, the cursor does not change to resize-cursor, while it changes to resize-cursor If I remove the glass pane.
Attached is the sample program (in one file) to recreate the problems.
If glass pane is working, the message "forward <EVENT_TYPE> event to <COMPONENT_CLASS_NAME>" will be shown on stdout.
I have a serious and very complecated reason to use glass pane. So I must overcome thease problems anyhow.
I appreciate any idea or help. Thanx in advance.
package GlassPaneTest;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.JComponent;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.SwingUtilities;
public class GlassTest extends JFrame {
    public static void main( String[] args ) {
        SwingUtilities.invokeLater( new Runnable() { public void run() {
            new GlassTest();
    public GlassTest() {
        super("");
        JDesktopPane desktop = new JDesktopPane();
        getContentPane().add(desktop);
        JInternalFrame frame1 = createFrame("1",  50, 20);
        JInternalFrame frame2 = createFrame("2", 300, 20);
        desktop.add(frame1);
        desktop.add(frame2);
        Glass glass = new Glass(desktop);
        setGlassPane(glass);
        glass.setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(600,300);
        setVisible(true);
    private JInternalFrame createFrame(String title, int x, int y) {
        JInternalFrame f = new JInternalFrame(title,true,true,true,true);
        f.setPreferredSize(new Dimension(200,200));
        f.setLocation(x, y);
        f.pack();
        f.setVisible(true);
        return f;
    public class Glass extends JComponent
                    implements MouseListener, MouseMotionListener {
        JDesktopPane     desktop;
        public Glass(JDesktopPane desktop){
            this.desktop = desktop;
            addMouseListener(this);
            addMouseMotionListener(this);
        public void mouseMoved(MouseEvent e) { redispatch(e); }
        public void mouseDragged(MouseEvent e) { redispatch(e); }
        public void mouseClicked(MouseEvent e) { redispatch(e); }
        public void mouseEntered(MouseEvent e) { redispatch(e); }
        public void mouseExited(MouseEvent e) { redispatch(e); }
        public void mousePressed(MouseEvent e) { redispatch(e); }
        public void mouseReleased(MouseEvent e) { redispatch(e); }
        private void redispatch(MouseEvent e) {
            Point p = e.getPoint();
            int id = e.getID();
            long when = e.getWhen();
            int mod = e.getModifiers();
            int clicks = e.getClickCount();
            boolean trigger = e.isPopupTrigger();
            Component c = SwingUtilities.getDeepestComponentAt(desktop, p.x, p.y);
            Point cp = SwingUtilities.convertPoint(this, p, c);
            if (c==null) return;
            showEvent(c, id);
            MouseEvent me = new MouseEvent(c, id, when, mod, cp.x, cp.y, clicks, trigger);
            c.dispatchEvent(me);
        public void showEvent(Component target, int id) {
            String E="UNKNOWN";
            switch (id) {
            case MouseEvent.MOUSE_CLICKED: E="CLICKED"; break;
            case MouseEvent.MOUSE_DRAGGED: E="DRAGGED"; break;
            case MouseEvent.MOUSE_ENTERED: E="ENTERED"; break;
            case MouseEvent.MOUSE_EXITED: E="EXITED"; break;
            case MouseEvent.MOUSE_MOVED: E="MOVED"; break;
            case MouseEvent.MOUSE_PRESSED: E="PRESSED"; break;
            case MouseEvent.MOUSE_RELEASED: E="RELEASED"; break;
            if (target instanceof JDesktopPane) return;
            System.out.println("forwad "+E+" event to "+target.getClass().getName());
}

Answer 1

Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
*Do NOT click the Reset button on the Safe Mode start window.
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes