[news.eclipse.platform.swt] How to get the focus of a Canvas

[sven.mueller@xxxxxxxxxxxxxxxxxxxx (Sven Müller)]

I'm programming a project with modular shells. It means something in the 
way of Gimp - one main window and a couple of shells if you need it.

Now I have the problem that one shell containes a canvas where I have to 
know when the mouse enters the canvas. So I thought FocusListener is what 
I'm looking for, but it doesn't work. 

Snippet 1:
mycanvas.addListener(SWT.FocusIn, new Listener(){
   public void handleEvent(Event event) {
	System.out.println("test");
   }			
});

does not recognize anything, when I enter with the mouse pointer.


Snippet 2:
mycanvas.addFocusListener(new FocusListener(){
   public void focusGained(FocusEvent e) {
       System.out.println("test");
   }
});

also ignores every mouseover-event.


Snippet 3:
Display display = this.mycanvas.getDisplay();
display.addFilter(SWT.FocusIn, new Listener(){
   public void handleEvent(Event event) {
	System.out.println("text");
   }
});

This version shows me at least something. More exactly I get a message if 
the mouse pointer enters the area of the main window, but it ignores every 
mouseover-event of the windows where the Canvas is included.

A really sick idea could be the use of a MouseMoveListener, but I don't 
know how to realize when the Canvas loses the focus.


How can I get a signal when entering the Canvas?