JavaFX类控制器Stage/Window引用

Question

有没有办法从关联的类控制器获取FXML加载文件的Stage/Window对象？

特别是，我有一个用于模态窗口的控制器，我需要Stage来关闭它。

- nailujed

Answer 1

我找不到一个优雅的解决方案，但我找到了这两个替代方案：

• 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.

- nailujed

Answer 2

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

另一种方法是定义一个静态 getter 来访问 Stage。

主类

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();
    }
}

现在你可以通过调用这个阶段来访问它

Main.getPrimaryStage()

在控制器类中

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

- Jinu P C