JavaFX+Scene Builder如何切换场景

Question

@FXML
Button btnSignIn;

@FXML
public void signInButtonClicked() throws Exception
{
//Here I want call the new Scene(SignInGUI.fxml) in my old Stage
   FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("../view/SignInGUI.fxml"));
}

        @Override
        public void start(Stage primaryStage) throws Exception 
      {
            Parent root = FXMLLoader.load(getClass().getResource("../view/LoginGUI.fxml"));

            primaryStage.setTitle("Taskplanner");
            primaryStage.setScene(new Scene(root,500,500));
            primaryStage.show();
        }


        public static void main(String[] args) {

            launch(args);
    }

Answer 1

您可以从按钮引用中获取对场景和窗口的引用。从那里，它是由你决定你想要如何显示新的视图。

以下是获取这些引用的方法：

Scene scene = btnSignIn.getScene();
Window window = scene.getWindow();
Stage stage = (Stage) window;

您可以通过更改场景的根来更改视图：

FXMLLoader loader = ... // create and load() view
btnSignIn.getScene().setRoot(loader.getRoot());

FXMLLoader loader = ... // create and load() view
Stage stage = (Stage) btnSignIn.getScene().getWindow();
Scene scene = new Scene(loader.getRoot());
stage.setScene(scene);