How to get background color of controls ?

Question

Hello everyone.
How to get background color of controls ?
When we use AWT/Swing,
we can get background color of component by using Component.getBackground()
It is regret that I can not find any method for such a method in JavaFX.
And how do we detect the change of background color of controls ?
Best regards.

Answer 1

Hi Tadashi,
try this.
@Override
public void start(final Stage primaryStage) {
    primaryStage.setTitle("Test ChangeListener");
    Button btn = new Button();
    btn.setText("change background");
    btn.setOnAction(new EventHandler<ActionEvent>() {
        @Override
        public void handle(ActionEvent event) {
            primaryStage.getScene().setFill(Color.rgb(
                    (int)(Math.random() * 255),
                    (int)(Math.random() * 255),
                    (int)(Math.random() * 255)));
    StackPane root = new StackPane();
    root.getChildren().add(btn);
    primaryStage.setScene(new Scene(root, 300, 250));
    primaryStage.getScene().fillProperty().addListener(new ChangeListener<Paint>() {
        @Override
        public void changed(ObservableValue<? extends Paint> arg0, Paint arg1, Paint arg2) {
            System.out.println(
                    "old color: " + arg1.toString()
                    + ", new color: " + arg2.toString());
    btn.getOnAction().handle(null);
    primaryStage.show();
}Peter