import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

// Show how a glass pane can be used to block mouse events
public class GlassExample {
    public static void main(String[] args) {
	
	// Create a frame and its content pane's contents
	JFrame f = new JFrame();
	f.addWindowListener( new WindowAdapter() {
	    public void windowClosing( WindowEvent e ) {
		e.getWindow().dispose();
		System.exit( 0 );
	    }
	} );
	final JPanel p1 = new JPanel();
	p1.add(new JLabel("Foo, Bar & Baz", JLabel.CENTER));
	p1.add(new JButton("Foo"));
	p1.add(new JButton("Bar"));
	f.setContentPane( p1 );
	
	// Place a button in the center of the glass pane and make it visible
	final JPanel glass = (JPanel)f.getGlassPane();
	glass.setVisible(true);
	glass.setLayout(new GridBagLayout());
	JButton glassButton = new JButton("Start");
	glass.add(glassButton);
	
	// Register for all the mouse events in the glass pane 
	// (and do nothing). This registration keeps the components 
	// in the content pane from being clickable. 
	// We could have created our own panel that called
	// enableEvents(AWTEvent.MOUSE_EVENT_MASK |
	// AWTEvent.MOUSE_MOTION_EVENT_MASK) to get the same effect.
	glass.addMouseListener(new MouseAdapter() {});
	glass.addMouseMotionListener(new MouseMotionAdapter() {});
	
	// Add a listener to the glass pane's button that will make the glass
	// pane invisible when the button is clicked.
	glassButton.addActionListener(new ActionListener() {
	    public void actionPerformed(ActionEvent ev) {
		glass.setVisible(false);
		p1.repaint();
	    }
	});
	
	// Display the example . . .
	f.setSize(150, 80);
	f.setVisible(true);
    }

}