javafx - JavaFX 下的全屏与 FXML

Question

我已经问过这个问题，但没有得到回答。

如何在 JavaFX 中通过按一个按钮切换到全屏模式？但是该按钮是使用 FXML(JavaFX Scene Builder)创建的。 (找不到符号(阶段))如果按钮是手动创建的，那么它可以工作。

public class Buch extends Application implements Initializable
{

@ Override
    public void start (Stage primaryStage) throws IOException
    {

        Stage stage = primaryStage;

        Parent root = FXMLLoader.load (getClass () getResource ("Buch.fxml").);

        Scene scene = new Scene (root);

        stage.setTitle ("Buch");
        stage.setScene (scene);
        stage.getIcons () add (new Image ("Icon.png"));
        / / stage.setFullScreen (true) / / Works
        stage.show ();



    }

    @ FXML
    public void fullscreen (ActionEvent event)
    {

        / / stage.setFullScreen (true) / / Does not work
        / / cannot find symbol (stage)

    }

作品:

public class Buch extends Application implements Initializable
{

@ Override
    public void start (Stage primaryStage) throws IOException
    {

        Stage stage = primaryStage;

        Parent root = FXMLLoader.load (getClass () getResource ("Buch.fxml").);

        Scene scene = new Scene (root);

        stage.setTitle ("Buch");
        stage.setScene (scene);
        stage.getIcons () add (new Image ("Icon.png"));
        stage.show ();

        btn.setOnAction (new EventHandler <ActionEvent> ()
        {
            public void handle (ActionEvent evt)
            {
                stage.setFullScreen (true);
            }

        });

    }

不起作用(当然？):

public class Buch extends Application implements Initializable
{

@ Override
    public void start (Stage primaryStage) throws IOException
    {

        Stage stage = primaryStage;

        Parent root = FXMLLoader.load (getClass () getResource ("Buch.fxml").);

        Scene scene = new Scene (root);

        stage.setTitle ("Buch");
        stage.setScene (scene);
        stage.getIcons () add (new Image ("Icon.png"));
        stage.show ();

* /
       @ FXML
    public void fullscreen (ActionEvent event)
    {

        stage.setFullScreen (true) / / Does not work
        / / cannot find symbol (stage)

    }
/ * / / Will not work


    }

您也可以查看此链接。问题在这里更详细:

stackoverflow.com/questions/22820049/full-screen-under-javafx-with-fxml-does-not-work

如何在任何地方使用阶段变量？还是有其他解决方案？请帮帮我。

在互联网上，我的问题没有答案!？!

我是 Java 初学者。 :-)

感谢您的帮助

Answer 1

为什么您的应用程序也是您的 Controller ？这似乎不起作用，全屏功能或没有全屏功能。

在 Controller 中，只需注入(inject)按钮(或任何节点，但按钮是显而易见的)，然后调用getScene()和 getWindow()在事件处理程序中:

public class MyController {
    @FXML
    private Button fullScreenButton ;

    @FXML
    private void fullScreen(ActionEvent event) {
       Stage stage = (Stage) fullScreenButton.getScene().getWindow();
       stage.setFullScreen(true);
    }
}