AWTEventHelper() 
{
            super();
            AccessController.doPrivileged(this);
}

 public  void eventDispatched(AWTEvent ev) 
{
            int eventID = ev.getID();
            if((eventID & AWTEvent.MOUSE_EVENT_MASK) != 0) {
                MouseEvent me = (MouseEvent) ev;
                if(me.isPopupTrigger()) {
                    MenuElement[] elems = MenuSelectionManager
                            .defaultManager()
                            .getSelectedPath();
                    if(elems != null && elems.length != 0) {
                        return;
                        // We shall not interfere with already opened menu
                    }
                    Object c = me.getSource();
                    JComponent src = null;
                    if(c instanceof JComponent) {
                        src = (JComponent) c;
                    } else if(c instanceof BasicSplitPaneDivider) {
                        // Special case - if user clicks on divider we must
                        // invoke popup from the SplitPane
                        src = (JComponent)
                            ((BasicSplitPaneDivider)c).getParent();
                    }
                    if(src != null) {
                        if(src.getComponentPopupMenu() != null) {
                            Point pt = src.getPopupLocation(me);
                            if(pt == null) {
                                pt = me.getPoint();
                                pt = SwingUtilities.convertPoint((Component)c,
                                                                  pt, src);
                            }
                            src.getComponentPopupMenu().show(src, pt.x, pt.y);
                            me.consume();
                        }
                    }
                }
            }
            /* Activate a JInternalFrame if necessary. */
            if (eventID == MouseEvent.MOUSE_PRESSED) {
                Object object = ev.getSource();
                if (!(object instanceof Component)) {
                    return;
                }
                Component component = (Component)object;
                if (component != null) {
                    Component parent = component;
                    while (parent != null && !(parent instanceof Window)) {
                        if (parent instanceof JInternalFrame) {
                            // Activate the frame.
                            try { ((JInternalFrame)parent).setSelected(true); }
                            catch (PropertyVetoException e1) { }
                        }
                        parent = parent.getParent();
                    }
                }
            }
}

 public Object run() 
{
            Toolkit tk = Toolkit.getDefaultToolkit();
            if(invocator == null) {
                tk.addAWTEventListener(this, AWTEvent.MOUSE_EVENT_MASK);
            } else {
                tk.removeAWTEventListener(invocator);
            }
            // Return value not used.
            return null;
}