/*
 * @(#)DukeAnim.java	1.7 98/06/29
 *
 * Copyright 1998 by Sun Microsystems, Inc.,
 * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information
 * of Sun Microsystems, Inc. ("Confidential Information").  You
 * shall not disclose such Confidential Information and shall use
 * it only in accordance with the terms of the license agreement
 * you entered into with Sun.
 */

package demos.Images;

import java.awt.*;
import java.awt.event.*;
import java.awt.image.ImageObserver;
import J2DCanvas;


/**
 * Animated gif with a transparent background.
 */
public class DukeAnim extends J2DCanvas implements ImageObserver {

    private Image agif, clouds;
    private int xx, x, y, aw, ah;


    public DukeAnim() {
        setBackground(Color.white);
	clouds = getImage("images/clouds.jpg");
	agif = getImage("images/duke.running.gif");
	aw = agif.getWidth(this) / 2;
	ah = agif.getHeight(this) / 2;
	isRunning = true;
    }


    public void drawDemo(Graphics2D g2) {
	x = w/2 - aw;
	y = h/2 - ah;
	if (xx <= -clouds.getWidth(this))
	    xx = w;
        g2.drawImage(clouds, xx, 10, clouds.getWidth(this), h-20, this);
	// animated gif uses background color during blit
        g2.drawImage(agif, x, y, this);
	xx -= 3;
    }


    public boolean imageUpdate(Image img, int infoflags,
    	        int x, int y, int width, int height)
    {
        Graphics g = getGraphics();
        if (isRunning && (infoflags & ALLBITS) != 0)
            paint(g);
        if (isRunning && (infoflags & FRAMEBITS) != 0)
            paint(g);
        if (isShowing())
            g.dispose();
        return isShowing();
    }


    public static void main(String s[]) {
	final DukeAnim demo = new DukeAnim();
	WindowListener l = new WindowAdapter() {
	    public void windowClosing(WindowEvent e) {System.exit(0);}
	    public void windowDeiconified(WindowEvent e) { demo.start(); }
	    public void windowIconified(WindowEvent e) { demo.stop(); }
	};
	Frame f = new Frame("Java2D Demo - DukeAnim");
	f.addWindowListener(l);
	f.add("Center", demo);
	f.pack();
	f.setSize(new Dimension(400,300));
	f.show();
    }
}