Demonstrate use of GlassPane : GlassPane « Swing JFC « Java





Demonstrate use of GlassPane

Demonstrate use of GlassPane
 

import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

/*
 * 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();
      }
    });
  }

}




           
         
  










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