/*
 * Demonstrate how to handle user input
 * In particular, react to mouse clicks
 *
 * written by mike slattery - jan 2001
 */
import java.awt.*;
import java.awt.event.*;
import java.applet.*;

public class EventDemo extends Applet
{
	boolean mdown; // true when mouse button is pressed
	int mx,my; // coordinates of most recent mouse click

	/*
	 * Define a mouse listener to say how to
	 * react to mouse events
	 */
	private class mseL implements MouseListener
	{
		public void mousePressed(MouseEvent e)
		{
			mdown = true;
			mx = e.getX();
			my = e.getY();
			repaint();
		}

		public void mouseReleased(MouseEvent e)
		{
			mdown = false;
			repaint();
		}

		public void mouseClicked(MouseEvent e) {}
		public void mouseEntered(MouseEvent e) {}
		public void mouseExited(MouseEvent e) {}
	}

	public void init()
	{
		setBackground(Color.blue);
		mdown = false;
		/*
		 * Tell the applet that the mouse
		 * listener object should be notified
		 * about mouse events
		 */
		addMouseListener(new mseL());
	}

	public void paint(Graphics g)
	{
		/*
		 * If the mouse isn't pressed, just
		 * leave the plain background.
		 * If it is pressed, draw a dot
		 * there.
		 */
		if (mdown)
		{
			g.setColor(Color.green);
			g.fillOval(mx-10,my-10,20,20);
		}
	}
}