Creating a User Interface in JavaFX - JavaFX 8: A Definitive Guide to Building Desktop, Mobile, and Embedded Java Clients - page 59

line.startXProperty().bind(startXVal);
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 1");
stage.show();
}
}
Understanding the Timeline Class
The main purpose of the Timeline class is to provide the ability to change the values of properties in a gradual fashion
over given periods of time. Take a look at the following snippet from Listing 2-5 to see the timeline being created,
along with some of its commonly used properties.
DoubleProperty startXVal = new SimpleDoubleProperty(100.0);
...code omitted...
Timeline anim = new Timeline(
new KeyFrame(new Duration(0.0), new KeyValue(startXVal, 100.)),
new KeyFrame(new Duration(1000.0), new KeyValue(startXVal, 300., Interpolator.LINEAR))
);
anim.setAutoReverse(true);
anim.setCycleCount(Animation.INDEFINITE);
...code omitted...
line = new Line(0, 50, 200, 400);
line.setStrokeWidth(4);
line.setStroke(Color.BLUE);
...code omitted...
line.startXProperty().bind(startXVal);