JavaFX 2.0: PathTransition - transition along path

package javafx_path;

import javafx.animation.PathTransition;
import javafx.animation.PathTransitionBuilder;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.paint.Color;
import javafx.scene.shape.LineTo;
import javafx.scene.shape.MoveTo;
import javafx.scene.shape.Path;
import javafx.stage.Stage;
import javafx.util.Duration;

/**
 *
 * @web java-buddy.blogspot.com
 */
public class JavaFX_Path extends Application {
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }
    
    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("java-buddy.blogspot.com");
        Group root = new Group();
        Scene scene = new Scene(root, 400, 300, Color.WHITE);
        
        final Image image1 = new Image(getClass().getResourceAsStream("duke_44x80.png"));
        final ImageView imageView = new ImageView();
        imageView.setImage(image1);
        
        Path path = new Path();
        path.getElements().add(new MoveTo(50, 50));
        path.getElements().add(new LineTo(50, 200));
        path.getElements().add(new LineTo(100, 200));
        path.getElements().add(new LineTo(100, 100));
        path.getElements().add(new LineTo(200, 100));
        path.setStrokeWidth(1);
        path.setStroke(Color.BLACK);
        
        final PathTransition pathTransition = PathTransitionBuilder.create()
                .node(imageView)
                .path(path)
                .duration(Duration.millis(5000))
                .orientation(PathTransition.OrientationType.ORTHOGONAL_TO_TANGENT)
                .cycleCount(1)
                .build();
        
        Button btnStart = new Button("playFromStart");
        btnStart.setOnAction(new EventHandler<ActionEvent>() {
             
            @Override
            public void handle(ActionEvent event) {
                pathTransition.playFromStart();
            }
        });
        
        root.getChildren().add(btnStart);
        root.getChildren().add(imageView);
        root.getChildren().add(path);
        primaryStage.setScene(scene);
        primaryStage.show();

    }
}