JavaFX Bind Label textProperty更改为多个属性

Question

What i want to do is:

I have a JavaFX Window which i am constantly changing the width and height of it by dragging the corners or the sides . I want when the width or height are changing then the text of the Label to have the below format:

~Width=[here the width of the Window],Height[here the height of the Window]~

Example:

~Width=[1300],Height=[600]~

---

I want to do this using bindings and not using 2(two) ChangeListeners .

                                   I am trying:

label.textProperty().bind(I am stack here on how to do this...);

I had read also this question JavaFX bind to multiple properties

Answer 1

Just use Bindings.createStringBinding with both width and height as dependencies:

StringBinding binding = Bindings.createStringBinding(
            () -> MessageFormat.format("~Width=[{0}],Height=[{1}]~", primaryStage.getWidth(), primaryStage.getHeight()),
            primaryStage.widthProperty(),
            primaryStage.heightProperty());

label.textProperty().bind(binding);

Answer 2

I think the easiest way is to use a change listener, and query the with/height values manually. Like

public void init()
{
     ChangeListener<Number> listener = (obs, ov, nv) -> update();
    node.widthProperty().addListener(listener);
    node.heightProperty().addListener(listener);
}

public void update()
{
      label.setText(String.format("width[%s] height[%s]", node.getWidth()), node.getHeight);
}