win32: selecting menu item causes bogus mouse click event

This is with JDK1.1.1 on win32 only. It doesn't happen with JDK 1.1 and
it doesn't happen on Solaris.

If you select a menu item, then when you release the mouse the underlying
window gets a bogus mouseClicked event.

I ran into this with the BeanBox where some of the menu items cause you to
start a sequence where you have to click on a target bean or on a target
location in the BeanBox. I discovered I was getting a bogus mouseclick
under where the MenuItem had been. Unfortunately it's relatively difficult to
workaround as there is no obvious way to spot that the mouse click event is
really a bogus side-effect of the menu action.

The following code fragment demos the problem. Select the bargle menuitem
and you will get a gratuitous "clicked" message.

KGH 3/18/97

import java.awt.*;
import java.awt.event.*;
 
public class MenuClick extends Frame implements MouseListener {
 
    MenuClick() {
        super("MenuClick");
        setSize(200,200);
 
        MenuBar bar = new MenuBar();
        Menu m = new Menu("foo");
        bar.add(m);
        m.add(new MenuItem("argle"));
        m.add(new MenuItem("bargle"));
        setMenuBar(bar);
 
        addMouseListener(this);
 
        show();
    }
 
    public void mouseClicked(MouseEvent evt) {
        System.err.println("clicked");
    }
 
    public void mousePressed(MouseEvent evt) {
        System.err.println("pressed");
    }
 
    public void mouseReleased(MouseEvent evt) {
        System.err.println("released");
    }
 
    public void mouseEntered(MouseEvent evt) {
    }
 
    public void mouseExited(MouseEvent evt) {
    }
 
    public static void main(String argv[]) {
        new MenuClick();
    }
}