//  ClickingsAWTApplet.java  (c) 2000-2006 Kari Laitinen

//  http://www.naturalprogramming.com/

//  2000-11-02  First program version created.
//  2006-10-18  Last modification

//  This program demonstrates how a Java program can react to
//  mouse events. The following is the mechanism to react to
//  mouse events:
//   -- this program implements the MouseListener interface which
//      specifies a set of methods that are called automatically
//      by the program execution system
//   -- in the init() method the ClickingsAWTApplet object informs the
//      program execution system that it will listen to mouse events
//   -- this program provides either dummy or non-dummy implementations
//      for all the methods specified in the MouseListener interface


import java.awt.* ;
import java.awt.event.* ;

public class ClickingsAWTApplet extends java.applet.Applet
                                implements MouseListener
{
   final int  MAXIMUM_NUMBER_OF_CLICKINGS  =  100 ;

   int  current_number_of_clickings  =  0 ;

   int  x_coordinates_of_clickings[]  =  
                        new  int[ MAXIMUM_NUMBER_OF_CLICKINGS ] ;
   int  y_coordinates_of_clickings[]  =
                        new  int[ MAXIMUM_NUMBER_OF_CLICKINGS ] ;


   public void init()
   {
      setBackground( Color.white ) ;

      addMouseListener( this ) ;
   }

   //  The following dummy methods are needed
   //  to fully implement the MouseListener interface.
   public void mouseClicked( MouseEvent event ) {}
   public void mouseEntered( MouseEvent event ) {}
   public void mouseExited( MouseEvent event ) {}
   public void mouseReleased( MouseEvent event ) {}


   //  The following method will be called automatically by the
   //  program execution system when a mouse button is preesed
   //  down. The MouseEvent object that is received as a parameter
   //  contains information related to the mouse event.

   public void mousePressed( MouseEvent event )
   {
      if ( current_number_of_clickings < MAXIMUM_NUMBER_OF_CLICKINGS )
      {
         x_coordinates_of_clickings[ current_number_of_clickings ]
              =  event.getX() ;
         y_coordinates_of_clickings[ current_number_of_clickings ]
              =  event.getY() ;

         current_number_of_clickings  ++  ;

         repaint() ;
      }
   }

   public void paint( Graphics graphics )
   {
      for ( int clicking_index  =  0 ;
                clicking_index  <  current_number_of_clickings ;
                clicking_index  ++  )
      {
         graphics.fillOval(

           x_coordinates_of_clickings[ clicking_index ] - 3,
           y_coordinates_of_clickings[ clicking_index ] - 3, 6, 6 ) ;

         graphics.drawString(

           "(" + x_coordinates_of_clickings[ clicking_index ] +
           "," + y_coordinates_of_clickings[ clicking_index ] + ")",
           x_coordinates_of_clickings[ clicking_index ] + 7,
           y_coordinates_of_clickings[ clicking_index ] ) ;
      }
   }
}