13.20.java.java

// Fig. 13.20: MouseDetails.java
// Demonstrating mouse clicks and distinguishing between mouse buttons. import java.awt.*;
 import java.awt.event.*;
 import javax.swing.*;
import java.awt.*;

 public class Main extends JFrame {
 private int xPos, yPos;

 // set title bar String; register mouse listener; size and show window
 public Main()
 {
 super( "Mouse clicks and buttons" );

 addMouseListener( new MouseClickHandler() );

 setSize( 350, 150 );
 setVisible( true );
 }

 // draw String at location where mouse was clicked
 public void paint( Graphics g )
 {
 // call superclass paint method
  super.paint(  g );
   g.drawString( "Clicked @ [" + xPos + ", " + yPos + "]",
 xPos, yPos );
 }

 public static void main( String args[] )
 {
 Main application = new Main();
 application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
 }

 // inner class to handle mouse events
 private class MouseClickHandler extends MouseAdapter {

 // handle mouse click event and determine which button was pressed
 public void mouseClicked( MouseEvent event )
 {
 xPos = event.getX();
 yPos = event.getY();

 String title = "Clicked " + event.getClickCount() + " time(s)";

 if ( event.isMetaDown() ) // right mouse button
 title += " with right mouse button";

 else if ( event.isAltDown() ) // middle mouse button
 title += " with center mouse button";
   else // left mouse button
 title += " with left mouse button";

 setTitle( title ); // set title bar of window
 repaint();

 } // end method mouseClicked

 } // end private inner class MouseClickHandler

 } // end class MouseDetails