Menu hiden Problem

[mfc2005]

I have a JFrame containing a JTabbedPane with 2 tabs and a JMenubar with a few menus and menu items. When I click on the menus when tab1 is highlighted everything behaves how it should in the ordering, but when I click on tab2 (which has a painted canvas on it) I find the menu is hidden behind the canvas. Is this due to the stacking order?

 

[mfc2005]

Ah realised it was to do with mixing Light and heavy components (I assume canvas is a heavyweight component).
Is there an equivalent swing component (have checked don't think there is). If not how do I get round problems of showing a canvas inside a panel which is inside a JTabbedPane? Currently I have a Jframe, contentPane container, JTabbedPane, JPanel and then finally my drawing canvas (in that order). unfortunately when I start my program it doesn't display anything from my canvas class, which I know work if I just add the canvas to the contentPane. Is it because the canvas heavy component is falling through?

 

[prosper]

import java.awt.*;

import javax.swing.*;
public class MixPopupTest extends JFrame {
    public MixPopupTest() {
       super("Mix Popup Test");
       JMenuBar menubar = new JMenuBar();
       setJMenuBar(menubar);
       // Create lightweight-enabled menu
       JMenu menu = new JMenu("Lite Menu");
       menu.add("Salad");
       menu.add("Fruit Plate");
       menu.add("Water");
       menubar.add(menu);
       // Create lightweight-disabled menu
       JPopupMenu.
          setDefaultLightWeightPopupEnabled
          (false);
       menu = new JMenu("Heavy Menu");
       menu.add("Filet Mignon");
       menu.add("Gravy");
       menu.add("Banana Split");
       menubar.add(menu);
       // Create Heavyweight AWT Button
       Button heavy = new Button
           ("  Heavyweight Button  ");
       // Add heavy button to box
       Box box = Box.createVerticalBox();
       box.add(Box.createVerticalStrut(20));
       box.add(heavy);
       box.add(Box.createVerticalStrut(20));
       getContentPane().add("Center", box);
       pack();
    }
    public static void main(String[] args) {
        MixPopupTest t = new MixPopupTest();
        t.show();
    }
}

// i think this line will help you
JPopupMenu. setDefaultLightWeightPopupEnabled (false);

 

[prosper]

The program is from sun

http://java.sun.com/products/jfc/tsc/articles/mixing/