//  MovingBallAWTApplication.java  (c) Kari Laitinen

//  http://www.naturalprogramming.com

//  2002-09-16  File created.
//  2009-11-05  Latest modification.

//  This program is a Java application that is similar to
//  applet MovingBallAWTApplet.java.

//  This program represents 'old' Java technology as it is not a
//  swing program.

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

public class MovingBallAWTApplication extends  Frame
                                      implements ActionListener,
                                                 ItemListener,
                                                 WindowListener
{
   static final int WINDOW_WIDTH   =  600 ;
   static final int WINDOW_HEIGHT  =  480 ;

   Button  left_button, up_button, down_button, right_button ;

   int  ball_center_point_x, ball_center_point_y ;

   Color  current_ball_color   =  Color.red ;

   public MovingBallAWTApplication()
   {
      setLayout( new BorderLayout() ) ;

      Panel operations_panel  =  new  Panel() ;

      left_button     =  new Button( " < " ) ;
      up_button       =  new Button( " Up " ) ;
      down_button     =  new Button( " Down " ) ;
      right_button    =  new Button( " > " ) ;

      left_button.addActionListener( this ) ;
      up_button.addActionListener( this ) ;
      down_button.addActionListener( this ) ;
      right_button.addActionListener( this ) ;

      operations_panel.add( left_button ) ;
      operations_panel.add( up_button ) ;
      operations_panel.add( down_button ) ;
      operations_panel.add( right_button ) ;

      Choice  color_selection_menu  =  new Choice() ;

      color_selection_menu.addItem( "red" ) ;
      color_selection_menu.addItem( "orange" ) ;
      color_selection_menu.addItem( "yellow" ) ;
      color_selection_menu.addItem( "green" ) ;
      color_selection_menu.addItem( "blue" ) ;
      color_selection_menu.addItem( "magenta" ) ;
      color_selection_menu.addItem( "cyan" ) ;
      color_selection_menu.addItem( "pink" ) ;
      color_selection_menu.addItem( "lightGray" ) ;

      color_selection_menu.addItemListener( this ) ;

      operations_panel.add( color_selection_menu ) ;

      add( "South", operations_panel ) ;

      // This class implements a WindowListener interface.

      addWindowListener( this ) ;

      setSize( WINDOW_WIDTH, WINDOW_HEIGHT ) ;

      setTitle( "Window for a Moving Ball" ) ;

      ball_center_point_x  =  WINDOW_WIDTH / 2 ;
      ball_center_point_y  =  WINDOW_HEIGHT / 2 ;
   }

   public void actionPerformed( ActionEvent event )
   {
      if ( event.getSource() instanceof Button )
      {
         if ( event.getSource()  ==  left_button )
         {
            ball_center_point_x  -=  3 ;
         }
         else if ( event.getSource()  ==  up_button )
         {
            ball_center_point_y  -=  3 ;
         }
         else if ( event.getSource()  ==  down_button )
         {
            ball_center_point_y  +=  3 ;
         }
         else if ( event.getSource()  ==  right_button )
         {
            ball_center_point_x  +=  3 ;
         }

         repaint() ;
      }
   }

   public void itemStateChanged( ItemEvent menu_selection )
   {
      String selected_color  =  (String) menu_selection.getItem() ;

      if ( selected_color.equals( "red" ) )
      {
         current_ball_color  =  Color.red ;
      }
      else if ( selected_color.equals( "orange" ) )
      {
         current_ball_color  =  Color.orange ;
      }
      else if ( selected_color.equals( "yellow" ) )
      {
         current_ball_color  =  Color.yellow ;
      }
      else if ( selected_color.equals( "green" ) )
      {
         current_ball_color  =  Color.green ;
      }
      else if ( selected_color.equals( "blue" ) )
      {
         current_ball_color  =  Color.blue ;
      }
      else if ( selected_color.equals( "magenta" ) )
      {
         current_ball_color  =  Color.magenta ;
      }
      else if ( selected_color.equals( "cyan" ) )
      {
         current_ball_color  =  Color.cyan ;
      }
      else if ( selected_color.equals( "pink" ) )
      {
         current_ball_color  =  Color.pink ;
      }
      else if ( selected_color.equals( "lightGray" ) )
      {
         current_ball_color  =  Color.lightGray ;
      }

      repaint() ;
   }

   public void windowClosing( WindowEvent event )
   {
      setVisible( false ) ;
      System.exit( 0 ) ;
   }


   //  Other methods required by the WindowListener interface:

   public void windowActivated( WindowEvent event ) {}
   public void windowClosed( WindowEvent event ) {}
   public void windowDeactivated( WindowEvent event ) {}
   public void windowDeiconified( WindowEvent event ) {}
   public void windowIconified( WindowEvent event ) {}
   public void windowOpened( WindowEvent event ) {}



   public void paint( Graphics graphics )
   {
      graphics.setColor( current_ball_color ) ;

      graphics.fillOval( ball_center_point_x - 50, ball_center_point_y - 50,
                         100, 100 ) ;

      graphics.setColor( Color.black ) ;

      // The y coordinate for drawString() is different here
      // than in MovingBallApplet.java

      graphics.drawString( "("   +  ball_center_point_x  +
                           ", "  +  ball_center_point_y  +
                           ")",  20, 50 ) ;

      graphics.drawOval( ball_center_point_x - 50, ball_center_point_y - 50,
                         100, 100 ) ;
   }


   public static void main( String[] command_line_arguments )
   {
      MovingBallAWTApplication  this_application_window  =
                                new  MovingBallAWTApplication() ;

      this_application_window.setVisible( true ) ;
   }
}