Right-Click on JMenuItem

[Jeff Storey]

Hi. I have a JMenuItem that gets added to a JMenu and I'd like to add a popup menu that gets displayed when I right-click on the menu item (and the underlying menu still stays visible), and when I left-click on the menu, it performs its normal action. Does anyone know how to do this?

Thanks,
Jeff

[Gregg Bolinger]

I spent a little bit of time with this tonight. Couldn't get it perfect, but maybe this will get you started:

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
 
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
 
public class PopupTest extends JFrame implements MouseListener
{
public static void main(String[] args)
{
new PopupTest();

}
public PopupTest()
{
super("Popup Test");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setJMenuBar(buildMenuBar());
setSize(300, 300);
setVisible(true);
}

public JMenuBar buildMenuBar()
{
JMenuBar menuBar = new JMenuBar();
JMenu fileMenu = new JMenu("File");

JMenuItem newMenuItem = new JMenuItem("New");
newMenuItem.setComponentPopupMenu(buildPopupMenu());

MouseListener[] als = newMenuItem.getMouseListeners();
for (MouseListener ml : als)
{
newMenuItem.removeMouseListener(ml);
}

System.out.println(als.length);

newMenuItem.addMouseListener(this);
fileMenu.add(newMenuItem);
menuBar.add(fileMenu);

return menuBar;
}

public JPopupMenu buildPopupMenu()
{
JPopupMenu popupMenu = new JPopupMenu();
JMenuItem rightClickMenuItem = new JMenuItem("Click Me");
popupMenu.add(rightClickMenuItem);
return popupMenu;
}
 
public void mouseClicked(MouseEvent e)
{
System.out.println("Clicked:" + e.getSource().toString());
if (e.getSource() instanceof JMenuItem)
{
JMenuItem jmi = (JMenuItem)e.getSource();
JPopupMenu jp = (JPopupMenu)jmi.getComponentPopupMenu();
jp.setLocation(jmi.getX(), jmi.getY());
System.out.println(e.getX() + " : " + e.getY());
jp.setVisible(true);
}


}
 
public void mouseEntered(MouseEvent e)
{
}
 
public void mouseExited(MouseEvent e)
{
}
 
public void mousePressed(MouseEvent e)
{
}
 
public void mouseReleased(MouseEvent e)
{
}


}

[Jeff Storey]

Hi Gregg. I appreciate the start on this code. I think some of that popup code will be useful, but I think I may need to create my own MenuUI. I was doing some digging to find out where the mouse events are processed and it appears to be in the BasicMenuUI. So, I think I have one of two options: either remove the mouse listeners from the menu that already exist and then add my own (but I think this might be a little risky since who knows what other mouse listeners are on the menu item) or create my own MenuUI.

I'm thinking this is not such a simple problem (while I do a lot of Swing programming, creating my own UI classes such as this is not something I do often). Thanks for the help.

Jeff