// Fig. 12.17: MouseTracker.java
// Demonstrating mouse events.

// Java core packages
import java.awt.*;
import java.awt.event.*;

// Java extension packages
import javax.swing.*;

public class MouseTracker extends JFrame
   implements MouseListener, MouseMotionListener {

   private JLabel statusBar;

   // set up GUI and register mouse event handlers
   public MouseTracker()
   {
      super( "Demonstrating Mouse Events" );

      statusBar = new JLabel();
      getContentPane().add( statusBar, BorderLayout.SOUTH );
    
      // application listens to its own mouse events
      addMouseListener( this );
      addMouseMotionListener( this );

      setSize( 275, 100 );
      setVisible( true );
   }

   // MouseListener event handlers

   // handle event when mouse released immediately after press
   public void mouseClicked( MouseEvent event )
   {
      statusBar.setText( "Clicked at [" + event.getX() +
         ", " + event.getY() + "]" );
   }

   // handle event when mouse pressed
   public void mousePressed( MouseEvent event )
   {
      statusBar.setText( "Pressed at [" + event.getX() +
         ", " + event.getY() + "]" );
   }

   // handle event when mouse released after dragging
   public void mouseReleased( MouseEvent event )
   {
      statusBar.setText( "Released at [" + event.getX() +
         ", " + event.getY() + "]" );
   }

   // handle event when mouse enters area
   public void mouseEntered( MouseEvent event )
   {
      JOptionPane.showMessageDialog( null, "Mouse in window" );
   }

   // handle event when mouse exits area
   public void mouseExited( MouseEvent event )
   {
      statusBar.setText( "Mouse outside window" );
   }

   // MouseMotionListener event handlers

   // handle event when user drags mouse with button pressed
   public void mouseDragged( MouseEvent event )
   {
      statusBar.setText( "Dragged at [" + event.getX() +
         ", " + event.getY() + "]" );
   }

   // handle event when user moves mouse
   public void mouseMoved( MouseEvent event )
   {
      statusBar.setText( "Moved at [" + event.getX() +
         ", " + event.getY() + "]" );
   }

   // execute application
   public static void main( String args[] )
   { 
      MouseTracker application = new MouseTracker();

      application.setDefaultCloseOperation(
         JFrame.EXIT_ON_CLOSE );
   }

}  // end class MouseTracker

/**************************************************************************
 * (C) Copyright 2002 by Deitel & Associates, Inc. and Prentice Hall.     *
 * All Rights Reserved.                                                   *
 *                                                                        *
 * DISCLAIMER: The authors and publisher of this book have used their     *
 * best efforts in preparing the book. These efforts include the          *
 * development, research, and testing of the theories and programs        *
 * to determine their effectiveness. The authors and publisher make       *
 * no warranty of any kind, expressed or implied, with regard to these    *
 * programs or to the documentation contained in these books. The authors *
 * and publisher shall not be liable in any event for incidental or       *
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 * furnishing, performance, or use of these programs.                     *
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