How to display Right-click popup menu in JPanel?

[ujjal dey]

Hi All,

In my application, a JPanel gets displayed in a JWindow. I need to add a right-click menu (with 'Exit' and 'About') in that JPanel.

I am not able to add the popup menu in the JPanel.

Can anybody please help me out??? Any pointer would be helpful.

Thanks in advance...

[Michael Dunn]

some info in a similar post here

http://forums.sun.com/thread.jspa?threadID=5393146&tstart=0

[Fred Hamilton]

This page does a good job of explaining mouse Events, and deals specifically with how to tell if a mouse click event is a right click, once you determine that you can take the appropriate steps to display your menu.

http://www.faqs.org/docs/javap/c6/s4.html

edit: You'll be probably using a JPopupMenu, and probably the show() method of this class to actually display the menu

[Ramses Butarbutar]

ujjal dey wrote:Hi All,

In my application, a JPanel gets displayed in a JWindow. I need to add a right-click menu (with 'Exit' and 'About') in that JPanel.

I am not able to add the popup menu in the JPanel.

Can anybody please help me out??? Any pointer would be helpful.

Thanks in advance...

This is a sample test using JPopup.. you can add the pannel.. and change item listener for your purpose.. But first , follow the link that suggested by others to determine and understand your purpose.

    
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[ 3 ];

      // 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++ ) {
         items[ i ] = new JRadioButtonMenuItem( colors[ i ] );
         popupMenu.add( items[ i ] );
         colorGroup.add( items[ i ] );
         items[ i ].addActionListener( handler );
      }

      getContentPane().setBackground( Color.white );

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

            public void mouseReleased( MouseEvent e )
               { checkForTriggerEvent( e ); }

            private void checkForTriggerEvent( MouseEvent e )
            {
               if ( e.isPopupTrigger() )
                  popupMenu.show( e.getComponent(),
                                  e.getX(), e.getY() );
            }
         }
      );

      setSize( 300, 200 );
      show();
   }

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

      app.addWindowListener(
         new WindowAdapter() {
            public void windowClosing( WindowEvent e )
            {
               System.exit( 0 );
            }
         }
      );
   }

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