JWindow blocking mouse wheel event?

Question

I have created a custom JPanel that acts as a container for another custom component that needs to receive mouse wheel events. When I place the custom JPanel in a JWindow the mouse wheel events do not get invoked, all though other mouse events work just fine. If I place the JPanel in a JFrame the mouse wheel events are invoked just fine (along with other mouse events).
To keep things simple the JPanel handles the mouse listeners. Any idea why it would work when in a JFrame but not a JWindow?
Edited by: skip1899 on Sep 21, 2009 7:20 AM

Answer 1

The below sample code exhibits the behavior I am talking about on my system (1.6.0_16 on XP). Does it work for you? Is there something I am missing?
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import javax.swing.JFrame;
import javax.swing.JWindow;
public class TestWindow extends JWindow implements
   MouseWheelListener,MouseListener {
     public TestWindow() {
          setSize(200,200);
          addMouseWheelListener(this);
          addMouseListener(this);
  public static void main(String args[]) {
       JFrame  frame = new JFrame();
       frame.setSize(300,300);
       frame.setVisible(true);
       TestWindow win = new TestWindow();
       win.setVisible(true);
public void mouseWheelMoved(MouseWheelEvent e) {
     System.out.println("Mouse Wheel Moved!");
public void mouseClicked(MouseEvent arg0) {
     System.out.println("Mouse Clicked!");
public void mouseEntered(MouseEvent arg0) {
     System.out.println("Mouse Entered!");
public void mouseExited(MouseEvent arg0) {
     System.out.println("Mouse Exited!");     
public void mousePressed(MouseEvent arg0) {
     System.out.println("Mouse Pressed!");     
public void mouseReleased(MouseEvent arg0) {
     System.out.println("Mouse Release!");