如何將堆棧窗格的不同場景設置為根布局JavaFX

Question

我是一名初學者，最近我學習了如何在JavaFX中的場景之間切換。 我想添加帶有某些菜單按鈕的“邊框窗格”（作為這些場景的容器），並在中心設置場景（仍然可以在它們之間切換）。 我應該怎么做或想到？ 這是我的代碼：

   public class Main extends Application {

        public static final String ROOT = "Root";
        public static final String ROOT_FXML = "Root.fxml";
        public static final String FIRST_SCREEN = "FirstScreen";
        public static final String FIRST_SCREEN_FXML = "FirstScreen.fxml";
        public static final String SECOND_SCREEN = "SecondScreen";
        public static final String SECOND_SCREEN_FXML = "SecondScreen.fxml";



        @Override
        public void start(Stage primaryStage) {

            ScreensController mainContainer = new ScreensController();


            mainContainer.loadScreen(Main.FIRST_SCREEN, Main.FIRST_SCREEN_FXML);
            mainContainer.loadScreen(Main.SECOND_SCREEN, Main.SECOND_SCREEN_FXML);
            mainContainer.setScreen(Main.FIRST_SCREEN);

            Group root = new Group();
            root.getChildren().addAll(mainContainer);
            Scene scene = new Scene(root);
            primaryStage.setScene(scene);
            primaryStage.show();

        }
    }

接口類

  public interface ControlledScreen {

    public void setScreenParent(ScreensController screenPage);
}

屏幕控制器類

public class ScreensController extends StackPane {

    private HashMap<String, Node> screens = new HashMap<>();

    public void addScreen(String name, Node screen) {
        screens.put(name, screen);
        System.out.println("added screen " + name);
    }

    public boolean loadScreen(String name, String resource) {
        try {
            FXMLLoader myLoader = new FXMLLoader(getClass().getResource(resource));
            Parent loadScreen = (Parent) myLoader.load();
            ControlledScreen myScreenControler = ((ControlledScreen) myLoader.getController());
            myScreenControler.setScreenParent(this);
            addScreen(name, loadScreen);
            return true;

        } catch (Exception e) {
            System.out.println(e.getMessage());
            return false;
        }
    }

    public boolean setScreen(final String name) {

        if (screens.get(name) != null) {
            if (!getChildren().isEmpty()) {
                getChildren().remove(0);
                // add new screen
                getChildren().add(0, screens.get(name));
            } else {
                getChildren().add(screens.get(name));
            }
            return true;
        } else {
            System.out.println("screen hasn't been loaded!\n");
            return false;
        }
    }

    public boolean unloadScreen(String name) {
        if (screens.remove(name) == null) {
            System.out.println("Screen didn't exist");
            return false;
        } else {
            return true;
        }
    }

}

目前，我有兩個帶有兩個diffrend fxml文件的控制器類。 他們看起來像這樣：

public class FirstScreenController implements ControlledScreen {

    ScreensController myController;

    @FXML
    void initialize() {

    }

    @Override
    public void setScreenParent(ScreensController screenPage) {
        myController = screenPage;

    }
}

有沒有辦法修復我的代碼？

Answer 1

我解決了問題。 這是新的主班

    public class Main extends Application {

       public static final String ROOT = "Root";
    public static final String ROOT_FXML = "Root.fxml";
    public static final String FIRST_SCREEN = "FirstScreen";
    public static final String FIRST_SCREEN_FXML = "FirstScreen.fxml";
    public static final String SECOND_SCREEN = "SecondScreen";
    public static final String SECOND_SCREEN_FXML = "SecondScreen.fxml";

    private Stage primaryStage;
    private BorderPane rootLayout;

    @Override
    public void start(Stage primaryStage) {
        this.primaryStage = primaryStage;
        ScreensController mainContainer = new ScreensController();
        initRootLayout();

        mainContainer.loadScreen(Main.FIRST_SCREEN, Main.FIRST_SCREEN_FXML);
        mainContainer.loadScreen(Main.SECOND_SCREEN, Main.SECOND_SCREEN_FXML);
        mainContainer.setScreen(Main.FIRST_SCREEN);


        Group root = new Group();
        root.getChildren().addAll(mainContainer);
        rootLayout.setCenter(root);

    }

    public void initRootLayout() {
        try {
            // Load root layout from fxml file.
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(Main.class.getResource("view/Root.fxml"));
            rootLayout = (BorderPane) loader.load();

            // Show the scene containing the root layout.
            Scene scene = new Scene(rootLayout);
            primaryStage.setScene(scene);
            primaryStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}