当按下输入或空格时防止按钮触发 Javafx

Question

I have a button on a Scene, that whenever the space bar or enter key is pressed, this button automatically fires. I want the user to be able to type these keys without this button firing. I have already tried doing root.requestFocus() and calling the request focus method on other nodes in my scene. How can I prevent this button from firing when these keys are pressed. Thanks for any help.

Edit: So far I have just done the boiler plate code to make a Javafx application work, added that button and a few labels. I have tried the requestFocus() method in several nodes in my application, none of which has made a difference. I also have a scene.setOnKeyPressed action event listener for keys pressed.

Answer 1

You can use the button.setFocusTraversable() method ( docs ). This prevents the button from being focused automatically, eg by pressing TAB .

Button button = new Button("Some Action");
button.setFocusTraversable(false);
button.setOnAction(event -> System.out.println("Some action called!"));

Answer 2

您是否尝试过为消耗事件的javafx.scene.input.KeyEvent添加事件过滤器？

Answer 3

Say your defaultFocusNode has focus, and you don't want your button to do its default behavior of taking focus for itself (and away from defaultFocusNode ) when button is clicked. When button gets focus, this code will immediately give focus back to defaultFocusNode .

button.focusedProperty().addListener((observableValue, oldValue, newValue) -> {
        if (newValue)  defaultFocusNode.requestFocus();
      });