Wie man ein Dialogfeld programmgesteuert schließt

Question

bitte ich brauche etwas Hilfe. Ich habe dieses Java-fx-Projekt, an dem ich arbeite. Die Idee ist, das Verhalten der Standard-Windows-Schließschaltfläche zu verhindern und den Dialog nur zu schließen, wenn die Anmeldung erfolgreich ist.

Unten ist, wie ich den Dialog einstellen und Dialog schließen kann.

public class MainController extends Application implements Initializable{ 

// Create a dialog 
private Dialog<Pair<String, String>> dialog = new Dialog<>(); 

/*Login resources*/ 
@FXML // fx:id="loginBtn" 
private Button loginBtn; // Value injected by FXMLLoader 

@FXML // fx:id="usernameTxt" 
private TextField usernameTxt; // Value injected by FXMLLoader 

@FXML // fx:id="loginProgressIndicator" 
private ProgressIndicator loginProgressIndicator; // Value injected by FXMLLoader 

@FXML // fx:id="passwordTxt" 
private PasswordField passwordTxt; // Value injected by FXMLLoader 

@FXML // fx:id="statusLbl" 
private Label statusLbl; // Value injected by FXMLLoader 

@FXML 
void login(ActionEvent event) { 

    Stage stage = (Stage) dialog.getDialogPane().getScene().getWindow(); 

    stage.fireEvent(
      new WindowEvent(
        stage, 
        WindowEvent.WINDOW_CLOSE_REQUEST 
      ) 
    ); 
} 

/*Main Menu resources*/ 
@FXML // ResourceBundle that was given to the FXMLLoader 
private ResourceBundle resources; 

@FXML // URL location of the FXML file that was given to the FXMLLoader 
private URL location; 

@FXML // fx:id="visitBtn" 
private Button visitBtn; // Value injected by FXMLLoader 

@FXML // fx:id="reportBtn" 
private Button reportBtn; // Value injected by FXMLLoader 

@FXML // fx:id="setupBtn" 
private Button setupBtn; // Value injected by FXMLLoader 

@FXML 
void report(ActionEvent event) { 

} 

@FXML 
void setup(ActionEvent event) { 

} 

@FXML 
void visit(ActionEvent event) { 
    System.out.println("Visit Button Pressed."); 
} 

/** 
* The main entry point for all JavaFX applications. 
* The start method is called after the init method has returned, 
* and after the system is ready for the application to begin running. 
* <p> 
* <p> 
* NOTE: This method is called on the JavaFX Application Thread. 
* </p> 
* 
* @param primaryStage the primary stage for this application, onto which 
*      the application scene can be set. The primary stage will be embedded in 
*      the browser if the application was launched as an applet. 
*      Applications may create other stages, if needed, but they will not be 
*      primary stages and will not be embedded in the browser. 
*/ 
@Override 
public void start(Stage primaryStage) throws Exception { 

    Parent root = FXMLLoader.load(getClass().getResource("main.fxml")); 
    Scene scene = new Scene(root); 

    primaryStage.setTitle("Main Menu - PEHCS Point of Sale"); 

    primaryStage.setScene(scene); 
    primaryStage.show(); //This will display the main menu 

    dialog.setTitle("Login - PEHCS Point of Sale"); 
    dialog.setHeaderText(null); 


    // Get the Stage. 
    Stage stage = (Stage) dialog.getDialogPane().getScene().getWindow(); 
    // Add a custom icon. 
    stage.getIcons().add(new Image(this.getClass().getResource("activa.jpg").toString())); 


    /*This section prevents the dialog from closing when we press on the window X button*/ 
    Window window = dialog.getDialogPane().getScene().getWindow(); 
    window.setOnCloseRequest(new EventHandler<WindowEvent>() { 

     /** 
     * Invoked when a specific event of the type for which this handler is 
     * registered happens. 
     * 
     * @param event the event which occurred 
     */ 
     @Override 
     public void handle(WindowEvent event) { 
      event.consume(); 
     } 
    }); 


    /*Set th content of that dialog to be the login.fxml resource file*/ 
    dialog.getDialogPane().setContent(FXMLLoader.load(getClass().getResource("login.fxml"))); 


    Optional<Pair<String, String>> result = dialog.showAndWait(); 

    result.ifPresent(usernamePassword -> { 
     System.out.println("Username=" + usernamePassword.getKey() + ", Password=" + usernamePassword.getValue()); 
    }); 

} 

/** 
* Called to initialize a controller after its root element has been 
* completely processed. 
* 
* @param location The location used to resolve relative paths for the root object, or 
*     <tt>null</tt> if the location is not known. 
* @param resources The resources used to localize the root object, or <tt>null</tt> if 
*/ 
@Override 
public void initialize(URL location, ResourceBundle resources) { 
    assert visitBtn != null : "fx:id=\"visitBtn\" was not injected: check your FXML file 'main2.fxml'."; 
    assert reportBtn != null : "fx:id=\"reportBtn\" was not injected: check your FXML file 'main2.fxml'."; 
    assert setupBtn != null : "fx:id=\"setupBtn\" was not injected: check your FXML file 'main2.fxml'."; 

    assert loginBtn != null : "fx:id=\"loginBtn\" was not injected: check your FXML file 'login.fxml'."; 
    assert usernameTxt != null : "fx:id=\"usernameTxt\" was not injected: check your FXML file 'login.fxml'."; 
    assert loginProgressIndicator != null : "fx:id=\"loginProgressIndicator\" was not injected: check your FXML file 'login.fxml'."; 
    assert passwordTxt != null : "fx:id=\"passwordTxt\" was not injected: check your FXML file 'login.fxml'."; 
    assert statusLbl != null : "fx:id=\"statusLbl\" was not injected: check your FXML file 'login.fxml'."; 
} 

public static void main(String[] args) { 
    launch(args); 
} 

Das Fenster Schließen-Ereignis wird in der On-Start-Methode verbraucht und es funktioniert. Jetzt möchte ich diesen Dialog in den Anmeldemethoden schließen. Hier stecke ich fest. Bitte, ich brauche Hilfe.

Vielen Dank im Voraus.

Answer 1

das Fenster programmatisch zu schließen, alles, was Sie brauchen, ist

@FXML 
void login(ActionEvent event) { 

    dialog.close(); 

} 

Beachten Sie, dass dies keine onCloseRequest Handler auslösen, das nur für eine externe Anforderung aufgerufen wird, das Fenster zu schließen (siehe docs).