Fire Button onAction on key released and touch released JavaFX

Question

The docs say the button should fire for clicks, keypress, and touch. It doesn't seem to work. Some code to play with.

public class FireButtonTest extends Application {

    @Override
    public void start(Stage primaryStage) {
        TextArea ta = new TextArea();

        Button btn1 = new Button();
        btn1.setText("btn1");
        btn1.setOnAction((ActionEvent event) -> {
            ta.setText(ta.getText()+"btn1 fired \n");
        });

        Button btn2 = new Button();
        btn2.setText("btn2");
        btn2.setOnAction((ActionEvent event) -> {
            ta.setText(ta.getText()+"btn2 fired \n");
        });

        btn2.setOnKeyReleased((KeyEvent ke) -> {
            if (ke.getCode() == KeyCode.ENTER) {
                ta.setText(ta.getText()+"btn2 key event -> ");
                btn2.fire();
            }
        });

        //?? can't test this
        btn2.setOnTouchReleased((TouchEvent te) -> {
            if (te.getTouchCount() == 1){
                ta.setText(ta.getText()+"btn2 touch event -> ");
                btn2.fire();
            }
        });

        VBox root = new VBox(5);
        root.getChildren().addAll(btn1, btn2, ta);

        Scene scene = new Scene(root, 300, 250);

        primaryStage.setTitle("Button Test");
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

Why can't I just press enter when the button is focused?

Answer 1

Doh! I guess you have to use the space bar. Here's the source.

<!-- language: java -->

protected static final List<KeyBinding> BUTTON_BINDINGS = new ArrayList<KeyBinding>();
     static {
             BUTTON_BINDINGS.add(new KeyBinding(SPACE, KEY_PRESSED, PRESS_ACTION));
             BUTTON_BINDINGS.add(new KeyBinding(SPACE, KEY_RELEASED, RELEASE_ACTION));
     }