/*
 *  ==============================================================
 *  DemoActionEvent.java : Action event example with one button
 *  that demonstrates sources, events, and their listeners.
 * 
 *  Adapted from : Pantham S., Pure JFC Swing, 1999.
 *  Modified by Mark Austin                            March, 2001
 *  ==============================================================
 */

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.net.URL;

// import javax.swing.SwingUtilities;

public class DemoActionEvent extends JApplet {
    Container container;
    JLabel        label;
    URL        codeBase; // URL for applet oodebase ...
    URL         xmasURL; // URL for xmas image ..
    Icon      xmasBells;

    public void init() {

        // 1. Get the handle on the applet's content pane.

        container =  this.getContentPane();

        // 2. Construct URL for image....

        codeBase = getCodeBase();
        try {
           xmasURL = new URL( codeBase, "bell.gif");
        } catch ( java.net.MalformedURLException e ) {
           System.out.println("Badly specified URL!!");
        }

        // 3. Download and save image icon ....

        xmasBells = new ImageIcon( xmasURL );

        // 4. Add bell icon to swing label, then add label to applet.
        
        label = new JLabel( xmasBells );
        container.add(label);

        // 5. Create a source (button) for the action event.

        JButton source = new JButton("Ring bell three times!");

        container.add(source, BorderLayout.SOUTH );

        // 6. Register the action listener with the source.

        source.addActionListener( new ButtonListener() );
    }

    // 7. Define the listener (inner) class.

    class ButtonListener implements ActionListener {

        // 8. Interface method that has been implemented.
        //    Ring the bell five times...

        public void actionPerformed(ActionEvent ae) {

            int i=0;
            while (i < 3) {

               Toolkit.getDefaultToolkit().beep();
               
               try {
                   Thread.currentThread().sleep(1000);
               } catch(InterruptedException ie) {
                   System.out.println("Sleep Interrupted");
               }
               i++;
            }
        }
    }
}