//********************************************************************
//  Dots.java                    Author: Lewis and Loftus
//  DotsAppletModified.java      modified: Omar
//
//  Instead of creating a separate listener object, I allow the applet  
//  itself to serve as listener. I just need one single class that extends 
//  Applet class and implements MouseListener interface.
//  Note that a reference to the Applet, using the this reference, is passed //  to addMouseListener method. So not only does the Applet generate the mouse //  events, it also listens for them to occur and responds.
//********************************************************************

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

public class DotsAppletModified extends Applet implements MouseListener 
{
   private final int APPLET_WIDTH = 200;
   private final int APPLET_HEIGHT = 100;
   private final int RADIUS = 6;

   private Point clickPoint = null;

   public void setPoint (Point point)
   {
      clickPoint = point;
   }

   public void init()
   {
      addMouseListener (this);

      setBackground (Color.black);
      setSize (APPLET_WIDTH, APPLET_HEIGHT);
   }

   public void paint (Graphics page)
   {
      page.setColor (Color.green);
      if (clickPoint != null) 
         page.fillOval (clickPoint.x - RADIUS, clickPoint.y - RADIUS,
                       RADIUS * 2, RADIUS * 2);
   }

   public void mouseClicked (MouseEvent event)
   {
      clickPoint = event.getPoint();
      repaint();
   }

   public void mousePressed (MouseEvent event) {}
   public void mouseReleased (MouseEvent event) {}
   public void mouseEntered (MouseEvent event) {}
   public void mouseExited (MouseEvent event) {}
}