/*
                Name:           Chris Johnson
                                        johnson@dcs.gla.ac.uk
 
                Last modified:  27/10/98
 
                Description:
		Creates some lights that are controlled by three buttons.

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

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

public class Lights extends Applet {
	
	Panel controls = new Panel(); // for the red, green and ambre buttons

	Button Red_Button = new Button("Red");  // create new buttons
	Button Amber_Button = new Button("Amber"); 
	Button Green_Button = new Button("Green");

	Traffic_Lights lights = new Traffic_Lights(this);
	// create some lights that will appear on this applet
	
	
	public void init(){
		
		setLayout(new BorderLayout());
		
		controls.setLayout(new FlowLayout(FlowLayout.LEFT));
		controls.add(Red_Button);
		controls.add(Amber_Button);
		controls.add(Green_Button);
		
		add("North", controls);
		add("Center", lights);
		
		validate();
	}

 	public boolean action (Event event, Object what) {
    
    		if(event.target== Red_Button) 
   		{
   			lights.set_lights("Red");
    			return true;
    		}
    		else if(event.target== Green_Button) 
   		{
   			lights.set_lights("Green");
    			return true;
    		}
    		else if(event.target== Amber_Button) 
   		{
   			lights.set_lights("Amber");
    			return true;
    		}
    		return false;
    	}
}