Duke Anim in JavaFX 1.3

In JavaFX 1.3 the evaluation of the KeyValues in the Timeline changed. Now, the KeyValues are evaluated once before the Timeline starts (see "Animation: Changed semantics of KeyValue evaluation" in Java FX 1.3 Migration Guide) and thus my Duke Anim doesn’t work in Java FX 1.3 :(.

To correct it, the function Timeline.evaluateKeyValues()  has been added. This function has to be used for re-evaluates all the keyValues when it is called.

Now, let us correct Duke Anim :)

To correct Duke Anim, I have made only 2 changes:

·         I call the function Timeline.evaluateKeyValues()  at the end of the action function of KeyFrame at 1s.
anim.evaluateKeyValues();

·         And I declare the variable anim with his type to be able to call the function Timeline.evaluateKeyValues()  in the action function of the KeyFrame.
public var anim:Timeline = Timeline { …

This Duke Anim's version works on : Windows (Seven), Linux (Ubuntu 9.10) and Mac OS X (10.6.3)  with the Default toolkit and the Prism toolkit (JVM argument: -Xtoolkit prism)

Main.fx

package dukeanim;

import java.util.Random;
import javafx.animation.Interpolator;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.Scene;
import javafx.scene.transform.Translate;
import javafx.runtime.ConditionalFeature;
import javafx.runtime.Platform;
import javafx.stage.Stage;

class DukeAnimModel {
  
    public var imageURL = "{__DIR__}images/duke.png";
  
    public var x = 0;
    public var y = 0;

    var xTarget = 0;
    var yTarget = 0;

    var xTemp = 0;
    var yTemp = 0;

    public var anim:Timeline =
    Timeline {
        autoReverse: false
        keyFrames: [
            KeyFrame {
                time: 0s
                values: [x => xTemp, y => yTemp]

            },
            KeyFrame {
                time: 1s
                values: [x => xTarget tween
                    Interpolator.SPLINE(0,.5,.5,1),y => yTarget tween
                    Interpolator.SPLINE(0,.5,.5,1)]

                action: function(): Void{

                    var generator = new Random();
                    xTarget = (generator.nextFloat() * 240 + 1) as Integer;
                    yTarget = (generator.nextFloat() * 320 + 1) as Integer;
                  
                    xTemp=x;
                    yTemp=y;

                    anim.evaluateKeyValues();
                }
            },
        ]
        repeatCount: Timeline.INDEFINITE
    };
}

println("Effect enabled: {Platform.isSupported(ConditionalFeature.EFFECT)}");
println("Input Method enabled: {Platform.isSupported(ConditionalFeature.INPUT_METHOD)}");
println("Scene 3D enabled: {Platform.isSupported(ConditionalFeature.SCENE3D)}");
println("Shape Clip enabled: {Platform.isSupported(ConditionalFeature.SHAPE_CLIP)}");

var dukeAnimModel = DukeAnimModel {}
dukeAnimModel.anim.play();

Stage {
    title: "Application title"
    width: 240  
    height: 320 
    scene: Scene {
        content: ImageView {
            transforms: Translate {
                x: bind dukeAnimModel.x
                y: bind dukeAnimModel.y
            }
            image: Image {
                url: dukeAnimModel.imageURL
            }
        }
    }
    onClose: function(){
        println("exit");
    }
}

Get the Netbeans projects