import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;

/**
 * This class represents a GUI for the basic bouncing ball program.
 * Not much work is done here; the majority of the interesting behavior is
 * found in the BallCanvas class.
 * @author Marty Stepp
 * @version CSE 331 Spring 2011, 5/11/2011
 */
public class BallGui implements ActionListener {
	private static final int FPS = 60;
	
	private JFrame frame;
	private BallCanvas canvas;
	private JButton start, stop;
	private Timer timmy;
	
	/**
	 * Constructs the GUI and displays it on the screen.
	 */
	public BallGui() {
		canvas = new BallCanvas();
		start = new JButton("Start");
		stop = new JButton("Stop");
		frame = new JFrame("CSE 331 Ball");
		
		timmy = new Timer(1000 / FPS, canvas);
		
		start.addActionListener(this);
		stop.addActionListener(this);

		Container south = new JPanel();
		south.add(start);
		south.add(stop);
		frame.add(south, BorderLayout.SOUTH);
		
		frame.setLocation(300, 100);
		frame.setSize(400, 300);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.add(canvas);
		frame.setVisible(true);
	}
	
	/**
	 * Handles action events (button clicks) in this GUI.
	 */
	public void actionPerformed(ActionEvent event) {
		if (event.getSource() == start) {
			timmy.start();
		} else {
			// stop
			timmy.stop();
		}
	}
}