Java Tutorial/Swing Event/PopupMenuListener

Using PopupMenuListener

   <source lang="java">

import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JMenuItem; import javax.swing.JPopupMenu; import javax.swing.event.PopupMenuEvent; import javax.swing.event.PopupMenuListener; // Define PopupMenuListener class MyPopupMenuListener implements PopupMenuListener {

 public void popupMenuCanceled(PopupMenuEvent popupMenuEvent) {
   System.out.println("Canceled");
 }
 public void popupMenuWillBecomeInvisible(PopupMenuEvent popupMenuEvent) {
   System.out.println("Becoming Invisible");
 }
 public void popupMenuWillBecomeVisible(PopupMenuEvent popupMenuEvent) {
   System.out.println("Becoming Visible");
 }

} public class PopupMenuListenerDemo {

 public static void main(final String args[]) {
   JFrame frame = new JFrame("PopupSample Example");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   // Create popup menu, attach popup menu listener
   JPopupMenu popupMenu = new JPopupMenu("Title");
   PopupMenuListener popupMenuListener = new MyPopupMenuListener();
   popupMenu.addPopupMenuListener(popupMenuListener);
   // Cut
   JMenuItem cutMenuItem = new JMenuItem("Cut");
   popupMenu.add(cutMenuItem);
   // Copy
   JMenuItem copyMenuItem = new JMenuItem("Copy");
   popupMenu.add(copyMenuItem);
   // Paste
   JMenuItem pasteMenuItem = new JMenuItem("Paste");
   pasteMenuItem.setEnabled(false);
   popupMenu.add(pasteMenuItem);
   // Separator
   popupMenu.addSeparator();
   // Find
   JMenuItem findMenuItem = new JMenuItem("Find");
   popupMenu.add(findMenuItem);
   JButton label = new JButton();
   frame.add(label);
   label.setComponentPopupMenu(popupMenu);
   frame.setSize(350, 250);
   frame.setVisible(true);
 }

}</source>