How to intercept all events sent to subcomponents of a JFrame

Question

Hello.
The title says everything, i think.
I need to make a gui where there would be a user validity timeout if no action is done during a certain period. (then, a modal dialog would show up, asking for a login/pass).
I could do that by modifying each and every swing components to have some date of last use" data, and a thread in the window, bla bla bla... but this is too heavy and crappy to me.
What i would like to do is intercept all events, note the date, and send them normally to who they were sent to originally.
Has anyone an idea?

Answer 1

okay, i've succeeded...
here is the source, in case some ever encounter the problem:
public class TimeoutGlassPane extends javax.swing.JComponent
     java.awt.Component     here=this;
     /** Creates a new instance of TimeoutGlassPane */
     public TimeoutGlassPane()
          addMouseListener(new javax.swing.event.MouseInputAdapter()
               public void mouseClicked(java.awt.event.MouseEvent e)
                    dispatch(e);
               public void mousePressed(java.awt.event.MouseEvent e)
                    dispatch(e);
               public void mouseReleased(java.awt.event.MouseEvent e)
                    dispatch(e);
               void dispatch(java.awt.event.MouseEvent e)
                    java.awt.Component component = javax.swing.SwingUtilities.getDeepestComponentAt(((javax.swing.JRootPane)getParent()).getLayeredPane(),e.getX(), e.getY());
                    java.awt.event.MouseEvent mouseEvent=javax.swing.SwingUtilities.convertMouseEvent((java.awt.Component)(e.getSource()), e, component);
                    component.dispatchEvent(mouseEvent);
     protected void paintComponent(java.awt.Graphics g)