samer@0: /*
samer@0:  *	Copyright (c) 2000, Samer Abdallah, King's College London.
samer@0:  *	All rights reserved.
samer@0:  *
samer@0:  *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
samer@0:  *	without even the implied warranty of MERCHANTABILITY or 
samer@0:  *	FITNESS FOR A PARTICULAR PURPOSE.
samer@0:  */
samer@0: 
samer@0: package samer.tools;
samer@0: import java.awt.*;
samer@0: import java.util.*;
samer@0: 
samer@0: public class ImageTrace extends ImageTraceBase
samer@0: {
samer@0: 	private	int		x=0;
samer@0: 
samer@0: 	public ImageTrace( ImageSourceBase i, Observable o) { super(i,o); }
samer@0: 
samer@0: 	public void next()
samer@0: 	{ 
samer@0: 		ip.sendPixels(); 
samer@0: 
samer@0: 		// make room for next image
samer@0: 		if (scroll) while (x+sx>width) { 
samer@0: 			graphics.copyArea(scrollStep,0,width-scrollStep,height,-scrollStep,0);
samer@0: 			x-=scrollStep;
samer@0: 		}
samer@0: 		else if (x>=width) x=0; 
samer@0: 
samer@0: 		if (!sc) {
samer@0: 			graphics.drawImage( img, x, 0, null);  
samer@0: 		} else {
samer@0: 			if (stretch) {
samer@0: 				graphics.drawImage( img, x, 0, sx, height, null); 
samer@0: 			} else {
samer@0: 				graphics.drawImage( img, x, 0, sx, sy, null); 
samer@0: 			}
samer@0: 		}
samer@0: 		getToolkit().sync();
samer@0: 		
samer@0: 		x+=sx;
samer@0: 	}
samer@0: 
samer@0: 	public Dimension getPreferredSize() {
samer@0: 		return new Dimension(cx*256,cy*ip.getHeight());
samer@0: 	}
samer@0: }