import java.awt.*;
import java.awt.event.*;

public class AnimatedImage extends java.applet.Applet 
                            implements Runnable, MouseListener {
    Image pics[] = new Image[16];
    String srcImages[] = {"swan_dive_lg_wht_19762_001.jpg",
			  "swan_dive_lg_wht_19762_002.jpg",
			  "swan_dive_lg_wht_19762_003.jpg",
			  "swan_dive_lg_wht_19762_004.jpg",
			  "swan_dive_lg_wht_19762_005.jpg",
			  "swan_dive_lg_wht_19762_006.jpg",
			  "swan_dive_lg_wht_19762_007.jpg",
			  "swan_dive_lg_wht_19762_008.jpg",
			  "swan_dive_lg_wht_19762_009.jpg",
			  "swan_dive_lg_wht_19762_010.jpg",
			  "swan_dive_lg_wht_19762_011.jpg",
			  "swan_dive_lg_wht_19762_012.jpg",
			  "swan_dive_lg_wht_19762_013.jpg",
			  "swan_dive_lg_wht_19762_014.jpg",
			  "swan_dive_lg_wht_19762_015.jpg",
			  "swan_dive_lg_wht_19762_016.jpg" };
			
    Image curImage;
    Thread runner;
    boolean stopped = true;
    Image offscreenImage;
    Graphics offscreenGraphics;
    Dimension offscreenSize;
    boolean fDisplayForward = true;
    
    public void start() {
	if (stopped == true) {
	    stopped = false;
	    runner = new Thread(this);
	    runner.start();
	    addMouseListener(this);
	}
    }

    public void stop() {
	stopped = true;
    }
  
    public void run() {
	int i;
	MediaTracker tracker = new MediaTracker(this);
	boolean fEnd;
	
	showStatus("Loading images...");
	for (i = 0; i < pics.length; i++) {
	    pics[i] = getImage(getCodeBase(),
		"images/" + srcImages[i]);
	    tracker.addImage(pics[i], i);
	}
	try {
	    tracker.waitForAll();
	    if (tracker.isErrorAny()) {
		showStatus("Error loading images");
	    }
	    else {
		showStatus("Images loaded");
	    }
	}
	catch (Exception e) {
	    e.printStackTrace();
	}

	// This helps identify flicker, and ensure double buffering is working
	setBackground(Color.blue);

	i = 0;
	// loop through images
	while (!stopped) {
	    showStatus(" " + i);  // hack, but it works
	    curImage = pics[i];
	    
	    repaint();
	    try { Thread.sleep(100); }
	    catch (InterruptedException e) {
		System.out.println("Exception\n");
	    }
	    // Calculate the next index
	    i = fDisplayForward ? i + 1 : i - 1;
	    
	    if (i == pics.length) {
		i = 0;
	    }
	    else if (i == -1) {
		i = pics.length - 1;
	    }
	    
	}
    }

    public void update(Graphics g) {
	Dimension d = getSize();
	if ((offscreenImage == null) ||
	    (d.width != offscreenSize.width) ||
	    (d.height != offscreenSize.height)) {

	    offscreenImage = createImage(d.width, d.height);
	    offscreenSize = d;
	    offscreenGraphics = offscreenImage.getGraphics();
	}
	offscreenGraphics.clearRect(0, 0, d.width, d.height);
	paint(offscreenGraphics);
	g.drawImage(offscreenImage, 0, 0, null);
    }
	
    public void paint(Graphics g) {
	Dimension d = getSize();
	if (curImage != null) {
	    g.drawImage(curImage, 0, 0, d.width, d.height, this);
	}
    }

    public void destroy() {
	offscreenGraphics.dispose();
    }

    public void mousePressed(MouseEvent e) {
	fDisplayForward = !fDisplayForward;
    }

    public void mouseReleased(MouseEvent e) { }
    public void mouseClicked(MouseEvent e) { }
    public void mouseEntered(MouseEvent e) { }
    public void mouseExited(MouseEvent e) { }
}