view src/samer/core_/util/swing/LED.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  javax.swing.*;
import  java.awt.*;
import  java.awt.event.*;

public class LED extends JComponent
{
	boolean state=false;
	
	public LED(Color fg) { this(fg,fg.darker().darker()); }
	public LED(Color fg, Color bg) { this(); setBackground(bg); setForeground(fg);	}
	public LED() {}
	
	public void update(Graphics g) { paint(g); }
	public void paint(Graphics g) {
		g.setColor( state ? getForeground() : getBackground());
		g.fillRect(0,0,getWidth(),getHeight());
	}

	public final void on() { set(true); }
	public final void off() { set(false); }
	public final void set( boolean state) { 
		if (state!=this.state) { this.state=state; repaint(); }
	}

	public Dimension getPreferredSize() { return new Dimension(8,8); }
}