JavaFX - Bind ButtonAction to ComboBox Item

Question

I'm using an editable ComboBox called testBox with the items testBox.getItems().addAll("A","B","C");. I also have an on Enter-Event

@FXML
public void onEnter(ActionEvent event){
//
}

And ButtonEvents like

@FXML
void aButton(ActionEvent event){
//Do stuff
}
@FXML
void bButton(ActionEvent event){
//Do stuff
}
@FXML
void cButton(ActionEvent event){
//Do stuff
}

How can i fire for example my button 'a'-event when the 'a'-item is selected and Enter pressed?

Please add snippets :).

Answer 1

You could determine the action to be executed in the event handler. E.g. assuming the items list is not modified:

List<EventHandler<ActionEvent>> handlers = Arrays.asList(
                                                    this::aButton,
                                                    this::bButton,
                                                    this::cButton
    );

@FXML
public void onEnter(ActionEvent event){
    int index = testBox.getSelectionModel().getSelectedIndex();
    if (index >= 0) {
         handlers.get(index).handle(event);
    }
}

You could of course also use a item type that contains a property for the handler...