在javaFX中切换场景

Question

我在选择menuItem时关闭当前场景并打开另一个场景时遇到问题.我的主要阶段编码如下:

public void start(Stage primaryStage) throws Exception {
   primaryStage.setTitle("Shop Management");
   Pane myPane = (Pane)FXMLLoader.load(getClass().getResource
("createProduct.fxml"));
   Scene myScene = new Scene(myPane);        
   primaryStage.setScene(myScene);
   primaryStage.show();
}

然后在createProduct.fxml中,当menuItem是onclick时,它将执行以下操作:

public void gotoCreateCategory(ActionEvent event) throws IOException {
    Stage stage = new Stage();
    stage.setTitle("Shop Management");
    Pane myPane = null;
    myPane = FXMLLoader.load(getClass().getResource("createCategory.fxml"));
    Scene scene = new Scene(myPane);
    stage.setScene(scene);
    stage.show();
}

它确实打开了createCategory.fxml.但是,以前的createProduct.fxml面板不会关闭.我知道有一个叫做stage.close()的东西要做这个,但我不知道在哪里实现它,因为我没有从一开始就从主右侧传递场景.我想知道我应该怎么解决这个问题.

提前致谢.

Answer 1

您必须在start方法中进行一些更改,例如..

public void start(Stage primaryStage) throws Exception {
   primaryStage.setTitle("Shop Management");

   FXMLLoader myLoader = new FXMLLoader(getClass().getResource("createProduct.fxml"));

   Pane myPane = (Pane)myLoader.load();

   CreateProductController controller = (CreateProductController) myLoader.getController();

   controller.setPrevStage(primaryStage);

   Scene myScene = new Scene(myPane);        
   primaryStage.setScene(myScene);
   primaryStage.show();
}

你的CreateProductController.java将是,

public class CreateProductController implements Initializable {

    Stage prevStage;

    public void setPrevStage(Stage stage){
         this.prevStage = stage;
    }

    @Override
    public void initialize(URL location, ResourceBundle resources) {
    }

    public void gotoCreateCategory(ActionEvent event) throws IOException {
       Stage stage = new Stage();
       stage.setTitle("Shop Management");
       Pane myPane = null;
       myPane = FXMLLoader.load(getClass().getResource("createCategory.fxml"));
       Scene scene = new Scene(myPane);
       stage.setScene(scene);

       prevStage.close();

       stage.show();
    }

}