import java.awt.Color;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JFrame;

import javax.swing.Timer;

/**

* Smoother version of Sim2 using a timer.

*/

public class Sim3 implements ActionListener {

private Drawing drawing;

private Toolkit toolkit;

/**

* Set up the drawing and window frame.

*/

public Sim3() {

// create some regular polygons

BlinkingPolygon bp = new BlinkingPolygon(3, 20, Color.BLUE);

MovingPolygon mp = new MovingPolygon(8, 30);

RotatingPolygon rp = new RotatingPolygon(5, 40);

// move them out of the corner

bp.translate(50, 50);

mp.translate(100, 100);

rp.translate(200, 200);

// create drawing, add polygons

drawing = new Drawing(800, 600);

drawing.add(bp);

drawing.add(mp);

drawing.add(rp);

// set up the window frame

JFrame frame = new JFrame("Drawing with ActionListener");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.add(drawing);

frame.pack();

frame.setVisible(true);

toolkit = frame.getToolkit();

}

@Override

public void actionPerformed(ActionEvent e) {

toolkit.sync();

drawing.step();

}

/**

* Create and start the timer.

*

* @param args command-line arguments

*/

public static void main(String[] args) {

Sim3 sim = new Sim3();

Timer timer = new Timer(1000 / 30, sim);

timer.start();

}

}