samer@0: /*
samer@0:  *	DoubleAgent.java
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  samer.core.*;
samer@0: import  samer.core.types.*;
samer@0: import  java.util.*;
samer@0: import  java.awt.*;
samer@0: 
samer@0: public class SignalTrace extends Trace
samer@0: {
samer@0: 	VDouble		x;
samer@0: 	Color			col;
samer@0: 	Renderer		R;
samer@0: 	int				oldj;
samer@0: 
samer@0: 	public SignalTrace(VDouble x) {
samer@0: 		this.x=x;
samer@0: 		col=Shell.getColor("color",getForeground());
samer@0: 		R=(Renderer)Shell.get("renderer",Renderer.LINE);
samer@0: 		oldj=-1;
samer@0: 	}
samer@0: 
samer@0: 	public void run() {
samer@0: 		super.run();
samer@0: 		int j=height-map.toInt(x.value);
samer@0: 		if (oldj<0) oldj=j;
samer@0: 		graphics.setColor(col);
samer@0: 		R.draw(graphics,x1,x2,oldj,j,j0);
samer@0: 		oldj=j;
samer@0: 	}
samer@0: 	public void detach() { x.deleteObserver(this); }
samer@0: 	public void update(Observable obs, Object arg) {
samer@0: 		if (arg==Viewable.DISPOSING) { detach(); getParent().remove(this); }
samer@0: 		else if (x==obs) run();
samer@0: 		else super.update(obs,arg);
samer@0: 	}
samer@0: 
samer@0: 	public void getCommands(Registry r) {	super.getCommands(r); r.add("renderer");	}
samer@0: 	public void execute(String cmd, Environment env) throws Exception {
samer@0: 		if (cmd.equals("renderer")) R=(Renderer)Shell.get("renderer",Renderer.LINE);
samer@0: 		else super.execute(cmd,env);
samer@0: 	}
samer@0: }
samer@0: