//
//  Animation test
//
//import java.awt.Graphics;
//import java.awt.Image;
import java.awt.*;
import java.lang.Math;

public class Animation extends java.applet.Applet implements Runnable {
	Image Pic ;
	boolean loop  = true;
	Thread kicker = null;
	int px=0 ;
	int py=0 ;
	int width    =80 ;
	int height   =60 ;
	int wait     =50 ;
	int imgwidth = 0 ;
	int imgheight= 0 ;
	String fname ="" ;
	
	public void init() {
		width =Integer.parseInt(getParameter("width")) ;
		height=Integer.parseInt(getParameter("height")) ;
		wait  =Integer.parseInt(getParameter("wait")) ;
		String fname = getParameter("fname") ;
		Pic=getImage(getCodeBase(), fname);

		MediaTracker mt = new MediaTracker(this) ;
		mt.addImage(Pic,0) ;
		try{
			mt.waitForAll() ;
		}catch (InterruptedException e){return;}
		
		imgwidth =Pic.getWidth(this) ;
		imgheight=Pic.getHeight(this) ;
	}

	public void paint(Graphics g) {
		update(g);
	}

	public void update(Graphics g) {
		if(Pic==null) {
			g.drawString("Error when loading picture", 0, 0);
		}
		g.drawImage(Pic,px,py, this);
	}
	
	public void start() {
		if(kicker == null) {    
			kicker=new Thread(this);        
			kicker.start();                 
		}
	}
	
	public void stop() {
		if ( kicker != null ) {
			kicker.stop();	
			kicker = null;
		}
	}
	
	public void run() {
		while(loop) { 
			repaint();
			px-=width ;
			if( px<=-(imgwidth) ){
				px=0 ;
				py-=height ;
				if( py<=-(imgheight) ){
					py=0 ;
				}
			}
			try {
				Thread.sleep( wait );
			} catch (InterruptedException e){}
		}
	}
}