JavaFX Class controller Stage/Window reference

问题

Is there any way of getting the Stage/Window object of an FXML loaded file from the associated class controller?

Particularly, I have a controller for a modal window and I need the Stage to close it.

回答1:

I could not find an elegant solution to the problem. But I found these two alternatives:

Getting the window reference from a Node in the Scene

@FXML private Button closeButton ;

public void handleCloseButton() {
  Scene scene = closeButton.getScene();
  if (scene != null) {
    Window window = scene.getWindow();
    if (window != null) {
      window.hide();
    }
  }
}

Passing the Window as an argument to the controller when the FXML is loaded.

String resource = "/modalWindow.fxml";

URL location = getClass().getResource(resource);
FXMLLoader fxmlLoader = new FXMLLoader();
fxmlLoader.setLocation(location);
fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory());

Parent root = (Parent) fxmlLoader.load();

controller = (FormController) fxmlLoader.getController();

dialogStage = new Stage();

controller.setStage(dialogStage);

...

And FormController must implement the setStage method.

回答2:

@FXML
private Button closeBtn;
Stage currentStage = (Stage)closeBtn.getScene().getWindow();
currentStage.close();

Another way is define a static getter for the Stage and Access it

Main Class

public class Main extends Application {
    private static Stage primaryStage; // **Declare static Stage**

    private void setPrimaryStage(Stage stage) {
        Main.primaryStage = stage;
    }

    static public Stage getPrimaryStage() {
        return Main.primaryStage;
    }

    @Override
    public void start(Stage primaryStage) throws Exception{
        setPrimaryStage(primaryStage); // **Set the Stage**
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        primaryStage.setTitle("Hello World");
        primaryStage.setScene(new Scene(root, 300, 275));
        primaryStage.show();
    }
}

Now you Can access this stage by calling

Main.getPrimaryStage()

In Controller Class

public class Controller {
public void onMouseClickAction(ActionEvent e) {
    Stage s = Main.getPrimaryStage();
    s.close();
}
}

来源：https://stackoverflow.com/questions/13015537/javafx-class-controller-stage-window-reference

标签

java

javafx-2

javafx