/*
                Name:           Chris Johnson
                                        johnson@dcs.gla.ac.uk
 
                Last modified:  27/10/98
 
                Description:
		Draws a light onto an already existing canvas -
		A_Light takes in a String and X,Y coordinates.
		The string sets the color of the light.
		Initially, the light is not lit.

		From an idea originally suggested by:
		Quintin Blane (qablane@surfaid.org)
*/

import java.awt.*;
import java.applet.Applet;


public class A_Light {
	
	private Color Bulb_color = Color.red;
	private boolean On = false;   // true if the light is lit
	private int X = 0;
	private int Y = 0;
	static int height = 50;
	static int width = 50;
	
	A_Light(String the_color, int X_pos, int Y_pos)
	// constructor
	{
			
			if(the_color.equals("Amber"))
				Bulb_color = Color.orange;
			else if (the_color.equals("Green"))
				Bulb_color = Color.green;
			else
				Bulb_color = Color.red;
				
			X = X_pos;
			Y = Y_pos;
	}
	
	public void on(){
	// turn the light on
		this.On = true;
	}
		
	public void off(){
	// turn the light off
		this.On = false;
	}
		
	public boolean is_on(){
	// is the light on?
		return this.On;
	}
	
	public Color The_Color()
	// what color is the light?
	{
		return this.Bulb_color;
	}
	
	public void paint(Graphics g){
	// draw the light onto g - the light is drawn as a filled
	// oval if it is on - if it is off then only the outline of
	// the oval is drawn.   The color of the light is given by 
	// its bulb value (see constructor)
		
		g.setColor(this.Bulb_color);
			
		if (On)
			g.fillOval(X, Y, width, height);
		else
			g.drawOval(X, Y, width, height);
	}
	
}