java left logo
java middle logo
java right logo
 

Home arrow Java SE Tips
 
 
Main Menu
Home
Java Tutorials
Book Reviews
Java SE Tips
Java ME Tips
Java EE Tips
Other API Tips
Java Applications
Java Libraries
Java Games
Java Network
Java Forums
Java Blog




Most Visited Tips
Java SE Tips
Java ME Tips
Java EE Tips
Other API Tips
Java Applications
Java Libraries
Java Games
Book Reviews
Top Rated Tips
Java SE Tips
Java ME Tips
Java EE Tips
Other API Tips
Java Applications
Java Libraries
Java Games
Book Reviews


Statistics
Registered Users: 4092
Java SE Tips: 614
Java ME Tips: 202
Java EE Tips: 183
Other API Tips: 779
Java Applications: 298
Java Libraries: 209
Java Games: 16
Book Reviews:
 
 
 
How to use popup menus in Swing applications E-mail
User Rating: / 43
PoorBest 

This Java Swing tip illustrates a method of generating a popup menu in the application. JPopupMenu is a container that is used to display popup menu's menu items. By default JPopupMenu is a lightweight container, however if it is the case that JPopupMenu's bounds are outside of main window, then heawyweight container will be used to display menu items.

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

public class PopupTest extends JFrame {

   private JRadioButtonMenuItem items[];
   private Color colorValues[] 
      Color.blue, Color.yellow, Color.red };

   public PopupTest()
   {
      super"Using JPopupMenus" );

      final JPopupMenu popupMenu = new JPopupMenu();
      ItemHandler handler = new ItemHandler();
      String colors[] "Blue""Yellow""Red" };
      ButtonGroup colorGroup = new ButtonGroup();
      items = new JRadioButtonMenuItem];

      // construct each menu item and add to popup menu; also
      // enable event handling for each menu item
      for int i = 0; i < items.length; i++ ) {         
         itemsnew JRadioButtonMenuItemcolors] );
         popupMenu.additems] );
         colorGroup.additems] );
         items].addActionListenerhandler );                
      }

      getContentPane().setBackgroundColor.white );

      // define a MouseListener for the window that displays
      // a JPopupMenu when the popup trigger event occurs
      addMouseListener(
         new MouseAdapter() {
            public void mousePressedMouseEvent e )
               checkForTriggerEvent)

            public void mouseReleasedMouseEvent e )
               checkForTriggerEvent)

            private void checkForTriggerEventMouseEvent e )
            {
               if e.isPopupTrigger() ) 
                  popupMenu.showe.getComponent(),
                                  e.getX(), e.getY() );               
            }
         }
      );    

      setSize300200 );
      show();
   }

   public static void mainString args[] )
   {
      PopupTest app = new PopupTest();

      app.addWindowListener(
         new WindowAdapter() {
            public void windowClosingWindowEvent e )
            {
               System.exit);
            }
         }
      );
   }

   private class ItemHandler implements ActionListener {
      public void actionPerformedActionEvent e )
      {
         // determine which menu item was selected
         for int i = 0; i < items.length; i++ )
            if e.getSource() == items] ) {
               getContentPane().setBackground(
                  colorValues] );
               repaint();
               return;
            }
      }
   }
}


 Related Tips

 
< Prev   Next >

Page 1 of 0 ( 0 comments )

You can share your information about this topic using the form below!

Please do not post your questions with this form! Thanks.


Name (required)


E-Mail (required)

Your email will not be displayed on the site - only to our administrator
Homepage(optional)



Comment Enable HTML code : Yes No



 
       
         
     
 
 
 
   
 
 
java bottom left
java bottom middle
java bottom right
RSS 0.91 FeedRSS 1.0 FeedRSS 2.0 FeedATOM FeedOPML Feed

Home - About Us - Privacy Policy
Copyright 2005 - 2008 www.java-tips.org
Java is a trademark of Sun Microsystems, Inc.