composite.addMouseTrackListener(new MouseTrackAdapter() {
		public void mouseExit(MouseEvent e) {
			Rectangle rect = composite.getClientArea();
			if (!rect.contains(e.x, e.y)) {
				//add your composite mouse exit logic here
				System.out.println("composite exit ");
			}
		}
		public void mouseEnter(MouseEvent e) {
			System.out.println("composite enter");
		}
	});