How to access a JavaFx Stage from a Controller?

Question

I\'m converting a pure JavaFx app, in which the code below worked fine when put all in one class, to a FXML one, where the Stage declaration and the button handler are in se

Answer 1

In your situation, it is probably easiest to get the scene from the ActionEvent parameter of your handler:

@FXML
private void handleSourceBrowse(ActionEvent ae) {
    Node source = (Node) ae.getSource();
    Window theStage = source.getScene().getWindow();

    sourceDirectoryChooser.showDialog(theStage);
}

See JavaFX: How to get stage from controller during initialization? for some more information. I am not in favor of the highest rated answer though, since it adds a compile time dependency to the controller after the .fxml file has been loaded (after all that question was tagged with javafx-2, so not sure if the above approach already worked there, and also the context of the question looks a bit different).

See also How do I open the JavaFX FileChooser from a controller class?