public static void main(String[] args)
	{
		JFrame frame = new JFrame();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.add(new JButton("hello"));
		MapGlassPane gp = new MapGlassPane();
		JPanel glass = (JPanel) frame.getGlassPane();
		glass.setVisible(true);
		glass.add(gp);
		gp.requestFocus();
		frame.pack();
		frame.setVisible(true);
	}