ToggleButton vs RadioButton

[Matt Dalen]

Hey, all,

I'm trying to create a gui for a touch-screen environment. I'd like one of the controls to look like a ToggleButton - ie, a group of buttons - but duplicating specific behavior from a RadioButton (specifically, the inability to deselect buttons - I want one button selected at all times.) I don't want to use a RadioButton, because I want the pressable area to be as large as possible. Looking through the api, I don't see an easy way to enforce that functionality on a ToggleButton, and I'm not sure how I would reskin a RadioButton to look like a regular button. Does anyone have any advice?

Thanks.

[Darryl Burke]

I don't see an easy way to enforce that functionality on a ToggleButton

Have you checked out the tutorial? Using JavaFX UI Controls - ToggleButton

edit Oh ok, I see you don't want to allow deselection of all buttons.

[Darryl Burke]

You can add a ChangeListener to the ToggleGroup's selectedToggleProperty() that selects the oldValue if the newValue is null, wrapped in a Platform.runLater(...) to ensure all FX event code precedes the custom selection. This will give you a group of ToggleButtons with the desired behavior.

edit This is all you need:

    toggleGroup.selectedToggleProperty().addListener(new ChangeListener<Toggle>() {

      public void changed(ObservableValue<? extends Toggle> observable,
              final Toggle oldValue, final Toggle newValue) {
        if ((newValue == null)) {
          Platform.runLater(new Runnable() {

            public void run() {
              toggleGroup.selectToggle(oldValue);
            }
          });
        }
      }
    });

[Matt Dalen]

Thanks a lot - that's exactly what I was looking for.