PopupListener.java

package org.freehep.swing.popup;

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JPopupMenu;

/**
 * A simple helper class for popping up popup menus.
 * This should be added as a mouse listener to the component to which 
 * the popup menu should be associated.
 * @author tonyj
 */
public class PopupListener extends MouseAdapter
{
   private JPopupMenu popup;
   
   public PopupListener(JPopupMenu popup)
   {
      this.popup = popup;
   }
   public void mousePressed(MouseEvent e)
   {
      maybeShowPopup(e);
   }
   public void mouseReleased(MouseEvent e)
   {
      maybeShowPopup(e);
   }
   protected void maybeShowPopup(MouseEvent e)
   {
      if (popup.isPopupTrigger(e))
      {
         popup.show(e.getComponent(), e.getX(), e.getY());
      }
   }
}