Using PopupMenu with awt components

[Mala Gupta]

If I change the PopupMenu's to JPopupMenu's, Panel to JPanel and Frame to JFrame then the below code works, not otherwise. WHY??

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class PopupMenuExample1
extends Frame
implementsActionListener
 {
    private PaneltopPanel;
privatePopupMenupopupMenu;

public PopupMenuExample1()
{
setTitle( "Popup Menu Application" );
setSize( 310, 130 );
setBackground( Color.gray );
topPanel = new Panel();
topPanel.setLayout( null );
//getContentPane().add( topPanel );
add( topPanel );
// Create some menu items for the popup
MenuItem menuFileNew = new MenuItem( "New" );
MenuItem menuFileOpen = new MenuItem( "Open..." );
MenuItem menuFileSave = new MenuItem( "Save" );
MenuItem menuFileSaveAs = new MenuItem( "Save As..." );
MenuItem menuFileExit = new MenuItem( "Exit" );
// Create a popup menu
popupMenu = new PopupMenu( "Menu" );
popupMenu.add( menuFileNew );
popupMenu.add( menuFileOpen );
popupMenu.add( menuFileSave );
popupMenu.add( menuFileSaveAs );
popupMenu.add( menuFileExit );
topPanel.add( popupMenu );
// Action and mouse listener support
enableEvents( AWTEvent.MOUSE_EVENT_MASK );
menuFileNew.addActionListener( this );
menuFileOpen.addActionListener( this );
menuFileSave.addActionListener( this );
menuFileSaveAs.addActionListener( this );
menuFileExit.addActionListener( this );
}
public void processMouseEvent( MouseEvent event )
{
if( event.isPopupTrigger() )
{
popupMenu.show( event.getComponent(),
event.getX(), event.getY() );
}
super.processMouseEvent( event );
}
public void actionPerformed( ActionEvent event )
{
// Add action handling code here
System.out.println( event );
}
public static void main( String args[] )
{
// Create an instance of the test application
PopupMenuExample1 mainFrame= new PopupMenuExample1();
mainFrame.setVisible( true );
}
}

[ June 03, 2003: Message edited by: Cindy Glass ]

[Cindy Glass]

Moving to the Swing and AWT forum.