JavaFX如何改变阶段 [英] JavaFX how to change stage

问题描述

我正在使用Netbeans 7.2和Scene Builder 1.0来开发JavaFX应用程序。我设置了主屏幕，我想拥有它，所以我点击一个按钮，它将关闭主窗口并打开另一个。主Stage对象位于主类中，但控制器类是独立的，并且不能访问它，因为它不是静态的并且在不同的类中。如何更改场景或舞台？

I'm using Netbeans 7.2 with Scene Builder 1.0 to develop a JavaFX application. I have my main screen set up, and I want to have it so I click a button and it'll close the main window and open another. The main Stage object is located in the main class, but the controller class is separate, and can't access it since it's not static and in a different class. How do I change the scene or stage?

推荐答案

下载JavaFX示例找到项目FXML-LoginDemo，这就是你所需要的。为了快速参考，我在这里复制粘贴主java类;）

Download JavaFX samples find the project FXML-LoginDemo , that's what you need. For quick reference i am copy pasting main java class here ;)

/*
 * Copyright (c) 2008, 2011 Oracle and/or its affiliates.
 * All rights reserved. Use is subject to license terms.
 *
 * This file is available and licensed under the following license:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the distribution.
 *  - Neither the name of Oracle Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
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;
    }
}

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