/* MultipleEvents1.java
 *
 * This program illustrates one way to handle multiple events in a single program - by
 * having a single listener that checks the source of the event to decide what to do.
 * The GUI consists of a window that can be drawn in one of three colors, and three 
 * buttons that can be used to change the color
 *
 * Copyright (c) 2000, 2004 - Russell C. Bjork
 */
 
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class MultipleEvents1 extends JFrame implements ActionListener
{
	// Constructor - create the GUI
	
	public MultipleEvents1()
    { 
      	super("MultipleEvents Demo #1");
      	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		// Add the buttons - in their own panel
		
        JPanel buttonPanel = new JPanel();
        redButton = new JButton("Red");
        redButton.addActionListener(this);
        buttonPanel.add(redButton);
        greenButton = new JButton("Green");
        greenButton.addActionListener(this);
        buttonPanel.add(greenButton);
        blueButton = new JButton("Blue");
        blueButton.addActionListener(this);
        buttonPanel.add(blueButton);
        getContentPane().add(buttonPanel, BorderLayout.SOUTH);
        
        setSize(300, 200);
    }
      
    // Action listener
    
    public void actionPerformed(ActionEvent event)
    { 
        Object source = event.getSource();
      	if (source == redButton)
      		getContentPane().setBackground(Color.red);
      	else if (source == greenButton)
      		getContentPane().setBackground(Color.green);
      	else if (source == blueButton)
      		getContentPane().setBackground(Color.blue);
      	repaint();
    }
    
    // Main program - Create the GUI and let it do the work 
   
    public static void main(String [] args)
    { 
    	new MultipleEvents1().setVisible(true); 
    }
        
    // GUI Components

    private JButton redButton, greenButton, blueButton;
}