JavaFX8 - FXML How to call method with parameters in onAction-tag?

Question

How is it possible to call a method with parameters out of FXML?

In Java I use this code:

textfield.setOnAction(event -> {
    endEdit(false);
});

In FXML I know I can call a method like this:

<TextField onAction="#endEdit">

So how can I call the method endEdit(Boolean) in FXML with the parameter false?

Answer 1

You could just encapsulate the endEdit(...) method call in a @FXML annotated method that handles the action event. Something like this:

public class FXMLController implements Initializable {

    @FXML
    protected void handleTextFieldAction(ActionEvent e) {
        endEdit(false);
    }

    private void endEdit(boolean flag) {
        System.out.println("Flag value: " + flag);
        // Your implementation here
    }

    @Override
    public void initialize(URL url, ResourceBundle rb) {
        // TODO
    }  
}

Then in your FXML file bind the text field's onAction property to this handleTextFieldAction(...) method like this:

<TextField onAction="#handleTextFieldAction" />

If the boolean flag actually depends on some conditions that have to be evaluated then you can process them within handleTextFieldAction(...) method and call endEdit(...) with the appropriate value.