/*
 * Copyright (c) 1995-1997 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and without
 * fee is hereby granted provided that this copyright notice
 * appears in all copies. Please refer to the file "copyright.html"
 * for further important copyright and licensing information.
 *
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 */
/*
 * 1.1 version.
 */

import java.awt.*;              /* Notice - this links to AWT classes */
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.applet.Applet;

public class ButtonDemo extends Applet
                        implements ActionListener {

Button b1, b2, b3;              /* AWT provides a Button class */
static final String DISABLE = "disable";
static final String ENABLE = "enable";

    public void init() {
        b1 = new Button();
        b1.setLabel("Disable middle button");
        b1.setActionCommand(DISABLE);

        b2 = new Button("Middle button");

        b3 = new Button("Enable middle button");
        b3.setEnabled(false);
        b3.setActionCommand(ENABLE);

        //Listen for actions on buttons 1 and 3.
        b1.addActionListener(this);
        b3.addActionListener(this);

        //Add Components to the Applet, using the default FlowLayout. 
        add(b1);
        add(b2);
        add(b3);
    }

    public void actionPerformed(ActionEvent e) {
        String command = e.getActionCommand();
                  
        if (command == DISABLE) { //They clicked "Disable middle button"
            b2.setEnabled(false);
            b1.setEnabled(false);
            b3.setEnabled(true);
        } else { //They clicked "Enable middle button"
            b2.setEnabled(true);
            b1.setEnabled(true);
            b3.setEnabled(false);
        }
    }
}