// The right way using a separate thread for the animation
// Raja Sooriamurthi 11/13/99

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.util.*;

public class BouncingBalls extends Applet {
    final static int NUM_BALLS = 4;
    Vector bv = new Vector();
    Thread dt;
    boolean RUNNING = true;

    public void init() {
        setBackground(new Color (0xff, 0xcc, 0xff));
        for (int i=0; i<NUM_BALLS; i++)
            bv.addElement (new MoveableBall(this));
        addMouseListener (new MouseClickedL());
        dt = new DrawThread (getGraphics(), bv);
    }

    public void start() {dt.start();}
    public void stop() {dt.stop();}	

    class MouseClickedL extends MouseAdapter {
        public void mouseClicked (MouseEvent e) {
	    e.consume();
            if (e.isShiftDown()) {
                if (RUNNING) {
                    dt.suspend();
                } else {
                    dt.resume();
                }
                RUNNING = !RUNNING;
            } else 
                bv.addElement (new MoveableBall 
			       (BouncingBalls.this, e.getPoint()));
        }
    }
}