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

/* Demonstrate use of GlassPane in JWindow & friends.
 * Buttons enable/disable it.
 * @author Eckstein et al, in the O'Reilly book "Java Swing"
 */
public class GlassExample {

	/** Construct a Splash screen with the given image */
	public static void main(String[] args) {
		JFrame f = new JFrame("GlassPane");
		
		final JPanel p1 = new JPanel();
		p1.add(new JLabel("GlassPane Example"));
		JButton show = new JButton("Show");
		p1.add(show);
		p1.add(new JButton("No-op"));
		f.getContentPane().add(p1);

		final JPanel glass = (JPanel)f.getGlassPane();

		glass.setVisible(true);
		glass.setLayout(new GridBagLayout());
		JButton glassButton = new JButton("Hide");
		glass.add(glassButton);

		f.setSize(150, 80);
		f.setVisible(true);

		boolean debug = false;
		if (debug) {
			System.out.println("Button is " + glassButton);
			System.out.println("GlassPane is " + glass);
		}

		// Add actions to the buttons...

		// show button (re-)shows the glass pane.
		show.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				glass.setVisible(true);
				p1.repaint();
			}
		});
		// hide button hides the Glass Pane to show what's under.
		glassButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				glass.setVisible(false);
				p1.repaint();
			}
		});
	}

}