/*
   PacmanFX.java Copyright (c) Kari Laitinen

   http://www.naturalprogramming.com/

   2014-12-16 File created.
   2014-12-29 Last modification.

   This program shows a Pacman on the screen. The Pacman closes and opens
   its mouth constantly.

   This program demonstrates
      - the use of the Arc class
      - the use of classes Timeline, KeyFrame, and KeyValue to control animation

*/


import javafx.animation.* ;
import javafx.util.Duration;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.shape.*;  // Arc, Circle, etc.
import javafx.stage.Stage;


public class PacmanFX extends Application
{
   public void start( Stage stage )
   {
      Group group_for_pacman = new Group() ;

      stage.setTitle( "PacmanFX.java" ) ;

      Scene scene = new Scene( group_for_pacman, 600, 500 ) ;

      scene.setFill( Color.LIGHTYELLOW ) ;

      // The center point of the Pacman is ( 300, 250 ) and ( width x height )
      // of its bounding rectangle is ( 128 x 96 ).
      // Initially the mouth of the Pacman is fully open.

      Arc pacman_shape = new Arc( 300, 250, // center point
                                  64, 48,   // width and height radiuses
                                  45,       // start angle in degrees
                                  270 ) ;   // length angle in degrees

      pacman_shape.setType( ArcType.ROUND ) ;
      pacman_shape.setFill( Color.FIREBRICK ) ; // Red/brown color.

      group_for_pacman.getChildren().add( pacman_shape ) ;
           
      stage.setScene( scene ) ;
      stage.show() ;

      Timeline timeline = new Timeline() ;

      timeline.setCycleCount( Animation.INDEFINITE ) ;
      timeline.setAutoReverse( true ) ;

      // The following KeyValue object specifies that the start angle of the
      // pacman shape will diminish to zero from its initial value 45.

      KeyValue start_angle_value = new KeyValue( pacman_shape.startAngleProperty(),
                                                 0 ) ;

      // The following object rules that the length angle property will grow
      // to 360 from its initial value 270.

      KeyValue length_value = new KeyValue( pacman_shape.lengthProperty(), 360 ) ;


      // The following KeyFrame object specifies that during 1000 milliseconds
      // two values change simultaneusly as specified by the KeyValue objects.
      // As the Timeline is set to AutoReverse mode, the same KeyFrame also
      // opens the mouth after it has been closed.

      KeyFrame closing_of_mouth = new KeyFrame( Duration.millis( 1000 ),
                                                start_angle_value,
                                                length_value ) ;

      timeline.getKeyFrames().add( closing_of_mouth ) ;

      timeline.play() ;
   }

   public static void main( String[] command_line_parameters )
   {
      launch( command_line_parameters ) ;
   }
}


/*  NOTES:



The following were useful pages when I was developing this program:

https://docs.oracle.com/javase/8/javafx/api/javafx/animation/Timeline.html

https://docs.oracle.com/javase/8/javafx/api/javafx/scene/shape/Arc.html
*/