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: 
samer@0: import java.awt.*;
samer@0: import java.util.*;
samer@0: import samer.core.*;
samer@0: import samer.core.util.*;
samer@0: 
samer@0: public abstract class ImageTraceBase extends ImageViewer
samer@0: {
samer@0: 	int		sx, sy;
samer@0: 	int		scrollStep=1;
samer@0: 	boolean	sc;
samer@0: 	boolean	stretch=false;
samer@0: 	boolean	scroll=false;
samer@0: 
samer@0: 	
samer@0: 	ImageTraceBase( ImageSourceBase i, Observable o)
samer@0: 	{
samer@0: 		super(i,o);
samer@0: 
samer@0: 		setScroll(Shell.getBoolean("scroll",false));
samer@0: 		setStretch(Shell.getBoolean("stretch",false));
samer@0: 		setScrollStep(1);
samer@0: 		setCellSize(cx,cy);
samer@0: 	}
samer@0: 
samer@0: 	public void setScrollStep(int st) { scrollStep=st; }
samer@0: 	public void setScroll(boolean f) { scroll=f; }
samer@0: 	public void setStretch(boolean f) {
samer@0: 		stretch = f;
samer@0: 		sc = stretch || (cx!=1) || (cy!=1);
samer@0: 	}
samer@0: 
samer@0: 	public void setCellSize( int a, int b) 
samer@0: 	{ 
samer@0: 		super.setCellSize(a,b);
samer@0: 		sc = stretch || (cx!=1) || (cy!=1);
samer@0: 		sx = cx*ip.getWidth();
samer@0: 		sy = cy*ip.getHeight();
samer@0: 	}
samer@0: 
samer@0: 	public void update( Graphics g) { clear(g); }
samer@0: 	public void paint( Graphics g) { clear(g); }
samer@0: 
samer@0: 	public void getCommands(Agent.Registry r) {
samer@0: 		super.getCommands(r); r.group();
samer@0: 		r.add("scroll",scroll).add("stretch",stretch).add("cell.size");
samer@0: 	}
samer@0: 
samer@0: 	public void execute(String cmd, Environment env)	throws Exception
samer@0: 	{
samer@0: 		if (cmd.equals("scroll")) {
samer@0: 			setScroll(X._bool(env.datum(),!scroll));
samer@0: 		} else if (cmd.equals("stretch")) {
samer@0: 			setStretch(X._bool(env.datum(),!stretch));
samer@0: 		} else if (cmd.equals("cell.size")) {
samer@0: 			setCellSize(
samer@0: 				X._int(env.datum("cell.width"),cx),
samer@0: 				X._int(env.datum("cell.height"),cy)
samer@0: 			);
samer@0: 		} else super.execute(cmd,env);
samer@0: 	}
samer@0: 
samer@0: 	public abstract void next();
samer@0: 	
samer@0: 	public void update(Observable o, Object oo) {
samer@0: 		if (o==obs && oo!=Viewable.DISPOSING) next();
samer@0: 		else super.update(o,oo);
samer@0: 	}
samer@0: }