JavaFX如何更改舞臺

Question

我正在使用Netbeans 7.2與Scene Builder 1.0開發JavaFX應用程序。我有我的主屏幕設置，我想要它，所以我點擊一個按鈕，它會關閉主窗口，並打開另一個。主Stage對象位於主類中，但控制器類是單獨的，並且由於它不是靜態的並且處於不同的類中，因此無法訪問它。我該如何改變場景或舞臺？

Answer 1

Download JavaFX samples找到項目FXML-LoginDemo，這就是你需要的。對於快速參考我在這裏複製粘貼主要的Java類;）

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package demo; 

import demo.model.User; 
import demo.security.Authenticator; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import javafx.application.Application; 
import javafx.fxml.FXMLLoader; 
import javafx.fxml.JavaFXBuilderFactory; 
import javafx.scene.Parent; 
import javafx.scene.Scene; 
import javafx.stage.Stage; 

/** 
* Main Application. This class handles navigation and user session. 
*/ 
public class App extends Application { 
    private Stage stage; 
    private User loggedUser; 

    private static App instance; 

    public App() { 
     instance = this; 
    } 

    public static App getInstance() { 
     return instance; 
    } 

    /** 
    * @param args the command line arguments 
    */ 
    public static void main(String[] args) { 
     launch(args); 
    } 

    @Override public void start(Stage primaryStage) { 
     try { 
      stage = primaryStage; 
      gotoLogin(); 
      primaryStage.show(); 
     } catch (Exception ex) { 
      Logger.getLogger(App.class.getName()).log(Level.SEVERE, null, ex); 
     } 
    } 

    public User getLoggedUser() { 
     return loggedUser; 
    } 

    public boolean userLogging(String userId, String password){ 
     if (Authenticator.validate(userId, password)) { 
      loggedUser = User.of(userId); 
      gotoProfile(); 
      return true; 
     } else { 
      return false; 
     } 
    } 

    public void userLogout(){ 
     loggedUser = null; 
     gotoLogin(); 
    } 

    private void gotoProfile() { 
     try { 
      replaceSceneContent("profile.fxml"); 
     } catch (Exception ex) { 
      Logger.getLogger(App.class.getName()).log(Level.SEVERE, null, ex); 
     } 
    } 

    private void gotoLogin() { 
     try { 
      replaceSceneContent("login.fxml"); 
     } catch (Exception ex) { 
      Logger.getLogger(App.class.getName()).log(Level.SEVERE, null, ex); 
     } 
    } 

    private Parent replaceSceneContent(String fxml) throws Exception { 
     Parent page = (Parent) FXMLLoader.load(App.class.getResource(fxml), null, new JavaFXBuilderFactory()); 
     Scene scene = stage.getScene(); 
     if (scene == null) { 
      scene = new Scene(page, 700, 450); 
      scene.getStylesheets().add(App.class.getResource("demo.css").toExternalForm()); 
      stage.setScene(scene); 
     } else { 
      stage.getScene().setRoot(page); 
     } 
     stage.sizeToScene(); 
     return page; 
    } 
} 

Answer 2

你也一樣可以做到這樣：

修改您的controller.java這樣

Stage thisStage; 

public void setStage (Stage stage){ 
    thisStage = stage; 
} 

public void showStage(){ 
    thisStage.setTitle("Titel in der MainController.java geändert"); 
    thisStage.show(); 
} 

重要的是，您不要在初始化方法中使用thisStage。

修改您的Mainclass這樣：

@Override 
public void start(Stage stage) throws Exception { 
    URL location = getClass().getResource("Main.fxml"); 
    FXMLLoader fxmlLoader = new FXMLLoader(); 
    fxmlLoader.setLocation(location); 
    fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory()); 
    Parent root = (Parent) fxmlLoader.load(location.openStream()); 
    Scene scene = new Scene(root); 
    stage.setScene(scene); 
    MainController mainController = fxmlLoader.getController(); 
    mainController.setStage(stage); 
    mainController.showStage(); 
} 

你可以下載一個例子PROJEKT版本（NetBeans）here。

Answer 3

我可能在這裏說類似的東西，但是這是我要做的事：

（在這個例子中，我從過渡到Login.fxml Home.fxml）。

裏面的LoginController.fxml類，我創建了以下方法：

@FXML 
private void login(javafx.event.ActionEvent event) throws IOException 
{ 
    if(pwf1.getText().equals("dolphin")) 
    { 
      Parent blah = FXMLLoader.load(getClass().getResource("Home.fxml")); 
      Scene scene = new Scene(blah); 
      Stage appStage = (Stage) ((Node) event.getSource()).getScene().getWindow(); 
      appStage.setScene(scene); 
      appStage.show(); 
    } 
    else 
    { 
      label1.setText("Password is incorrect. Please Try Again"); 
    } 
} 

就是這樣;）

Answer 4

根據您的問題，最近我正在開發一款iOS相當於NavigationController對於JavaFX，使用最簡單的推送和解除視圖。

讓我與社區共享代碼：https://github.com/jalopezsuarez/javafx-screens

的想法，是有一個非常非常簡單的環境，幫助您的屏幕之間切換。

希望它可以幫助你。