view src/samer/core_/util/swing/Meter.java @ 0:bf79fb79ee13

Initial Mercurial check in.

/*
 *	Copyright (c) 2000, Samer Abdallah, King's College London.
 *	All rights reserved.
 *
 *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
 *	without even the implied warranty of MERCHANTABILITY or 
 *	FITNESS FOR A PARTICULAR PURPOSE.
 */

package samer.core.util.swing;
import  samer.core.util.*;
import  samer.core.*;
import  java.awt.*;
import  java.util.*;
import javax.swing.BorderFactory;

public class Meter extends VCanvas
{
	IMap	map;
	int		lasti, nexti;
	double	x;

	public Meter() { map = new LinearMap(0,1); lasti=0; }

	public void exposeMap() { exposeMap(true); }
	public void exposeMap(boolean reinit) {
		final VMap	vmap=new VMap(map,reinit);
		vmap.addObserver( new Observer() {
			public void update(Observable o, Object args) {
				if (args==VMap.NEW_MAP) setMap(vmap.getMap());
				nexti=map.toInt(x); repaint();
			}
		} );
		vmap.changed();
		exposeCommands(vmap);
	}

	public void realized() {
		setBorder(BorderFactory.createLineBorder(getForeground().darker().darker()));
	}

	protected void paintComponent(Graphics g) {
		lasti=nexti;
		g.setColor(getBackground());
		g.fillRect(lasti,0,width-lasti,height);
		g.setColor(getForeground());
		g.fillRect(0,0,lasti,height);
	}

	public void next( double x) { 
		nexti=map.toInt(x); this.x=x;
		if (nexti!=lasti) repaint();
	}

	public Dimension getPreferredSize() { return new Dimension(96,6); }
	public Dimension getMinimumSize() { return new Dimension(32,4); }

	public IMap getMap() { return map; }
	public void setMap(IMap m) { map=m; lasti=0; repaint(); }
	protected void sized() { map.setIntRange(width); }
}