/**
 * This is example #6 out of 6, showing a sequence of improvements through
 * the progression of examples.  The six files should be viewed in order.
 * 
 * This file removes the 'update()' method that was created in an earlier
 * example, thus relying once again on the built-in (default) 'update()'
 * method.  This means that this is no longer a drawing program, since the
 * default 'update()' method paints over the background before calling the
 * 'paint()' method, effectively erasing all previous red dots.  This
 * program now simply allows the user to "drag" a red dot around on the
 * applet window.  More accurately, the program continuously erases the
 * previous dot and draws a new dot under the user's mouse pointer. 
 */

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

public class GraphicsDrawing6 extends Applet
{
	int mouseX = -10;
	int mouseY = -10;

	public void init()
	{
		setSize(400, 400);
		setBackground(Color.yellow);
		addMouseMotionListener(new HandleMouseMotion());
	}

	class HandleMouseMotion extends MouseMotionAdapter
	{
		public void mouseDragged(MouseEvent e)
		{
			mouseX = e.getX();
			mouseY = e.getY();
			repaint();
		}
	}

	public void paint(Graphics g)
	{
		g.setColor(Color.red);
		g.fillOval(mouseX - 10, mouseY - 10, 20, 20);
	}
}