/*
 *  File:  ButtonTest.java
 *
 *  Create some buttons with simple actions
 *
 *  Copyright:  Northeast Parallel Architectures Center
 *  
 */

import java.awt.Button;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class ButtonTest extends java.applet.Applet 
                        implements ActionListener {

// there are three buttons labelled red, white and blue
// this class is the event listener for the buttons

  private Button button1, button2, button3;
  private Font f = new Font( "Serif", Font.BOLD, 24 );

  public void init() {
    setBackground( Color.white );
    setFont (f);
    
    button1 = new Button( "Red" );
    button1.addActionListener( this );
    add( button1 );
    
    button2 = new Button( "White" );
    button2.addActionListener( this );
    add( button2 );
    
    button3 = new Button( "Blue" );
    button3.addActionListener( this );
    add( button3 );
    
  }
  
  public void actionPerformed( ActionEvent event ) {
// to respond to a button click, change the background color of the applet

    String buttonLabel = event.getActionCommand();
    
    if ( buttonLabel.equals( "Red" ) ) {
      setBackground( Color.red );
    } else if ( buttonLabel.equals( "White" ) ) {
      setBackground( Color.white );
    } else if ( buttonLabel.equals( "Blue" ) ) {
      setBackground( Color.blue );
    }
    
    colorButtons();
  }
  
  private void colorButtons() {
    button1.setBackground( Color.white );
    button2.setBackground( Color.white );
    button3.setBackground( Color.white );
  }

}