Creating a User Interface in JavaFX - JavaFX 8: A Definitive Guide to Building Desktop, Mobile, and Embedded Java Clients - page 67

Button resumeButton;
Button stopButton;
Ellipse ellipse;
Path path;
public static void main(String[] args) {
Application.launch(args);
}
@Override
public void start(Stage stage) {
ellipse = new Ellipse(100, 50, 4, 8);
ellipse.setFill(Color.BLUE);
path = new Path(
new MoveTo(100, 50),
new ArcTo(350, 350, 0, 300, 50, false, true)
);
PathTransition anim = new PathTransition(new Duration(1000.0), path, ellipse);
anim.setOrientation(OrientationType.ORTHOGONAL_TO_TANGENT);
anim.setInterpolator(Interpolator.LINEAR);
anim.setAutoReverse(true);
anim.setCycleCount(Timeline.INDEFINITE);
startButton = new Button("start");
startButton.setOnAction(e -> anim.playFromStart());
pauseButton = new Button("pause");
pauseButton.setOnAction(e -> anim.pause());
resumeButton = new Button("resume");
resumeButton.setOnAction(e -> anim.play());
stopButton = new Button("stop");
stopButton.setOnAction(e -> anim.stop());
HBox commands = new HBox(10, startButton,
pauseButton,
resumeButton,
stopButton);
commands.setLayoutX(60);
commands.setLayoutY(420);
Group group = new Group(ellipse, commands);
Scene scene = new Scene(group, 400, 500);
startButton.disableProperty().bind(anim.statusProperty()
.isNotEqualTo(Animation.Status.STOPPED));
pauseButton.disableProperty().bind(anim.statusProperty()
.isNotEqualTo(Animation.Status.RUNNING));
resumeButton.disableProperty().bind(anim.statusProperty()
.isNotEqualTo(Animation.Status.PAUSED));
stopButton.disableProperty().bind(anim.statusProperty()
.isEqualTo(Animation.Status.STOPPED));
stage.setScene(scene);
stage.setTitle("Metronome using PathTransition");
stage.show();
}
}