Question

文档说按钮应该为clicks, keypress, and touch.触发它似乎不起作用。一些代码可以使用。

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();
    }
}

为什么我不能只在按下按钮时按Enter键？

Answer 1

卫生署！我想你必须使用空格键。这是来源。

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));
     }

关键释放的触发按钮onAction和触摸释放的JavaFX

1 个答案: