/*
 *  ==============================================================
 *  DemoMouseMotion.java : Demonstrates mouse motion events.
 * 
 *  Adapted from : Pantham S., Pure JFC Swing, 1999.
 *  Modified by Mark Austin                            March, 2001
 *  ==============================================================
 */

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class DemoMouseMotion extends JApplet  {
   int x, y;
   int flag;
   
   public void init() {

      // 1. Create an object of the custom listener and register it with
      //    the applet.

      CustomListener ct = new CustomListener(this);
      this.addMouseMotionListener(ct);
   }

   // 2. The update() method to repair the applet's background.
   //    This can reduce the performance and lead to flickering.
   //    The workaround is to use a JPanel attached to the applet.

   public void update(Graphics g) {
       g.setColor( this.getBackground() );
       g.fillRect(0, 0, getWidth(), getHeight());
       paint(g);
   }

   // 3. The paint() method to display the mode of mouse motion
   //    and its location, depending on the flag value.

   public void paint(Graphics g) {
      g.setColor(Color.blue);
      g.drawString("Drag/Move the Mouse ...", 5, 20);
      g.setColor(Color.red);

      if(flag == 1) {
         g.drawString("Don't Move! Drag the Mouse!", 5, 85);
         g.drawString("Cursor Coordinates: " + x + ", " + y, 5, 95);
      }
      else if(flag == 2) {
         g.drawString("Don't Drag! Move the Mouse!", 5, 85);
         g.drawString("Cursor Coordinates: " + x + ", " + y, 5, 95);
      }
   }
}

// 4. The mouse motion listener.

class CustomListener implements MouseMotionListener {
   DemoMouseMotion dmm;

   public CustomListener( DemoMouseMotion dmm ) {
      this.dmm = dmm;   
   }
   
   // Executed when the mouse is moved.

   public void mouseMoved(MouseEvent me) {

      // Set the flag value

      dmm.flag = 1; 
     
      // Get the coordinates of the mouse pointer.

      dmm.x = me.getX(); 
      dmm.y = me.getY();

      // Repaint the applet.

      dmm.repaint();
   }

   // Executed when the mouse is dragged.

   public void mouseDragged(MouseEvent me) {

      // Set the flag value

      dmm.flag = 2;

      // Get the coordinates of the mouse pointer.

      dmm.x = me.getX();
      dmm.y = me.getY();

      // Repaint the applet.

      dmm.repaint();
   }
}