如何从一个控制器的标签发送文本并将其应用于另一个控制器的标签?

时间:2018-12-25 15:23:53

标签: java javafx scenebuilder

我正在使用JavaFX和Scene Builder制作应用程序。

我有两个控制器:Controller和FontController

我有Main类来启动程序并使用第一个fontroller(控制器)打开Stage

public class Main extends Application {


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

@Override
public void start(Stage primaryStage) throws Exception {
try {

  Parent root = FXMLLoader.load(getClass().getResource("/card/card.fxml"));
  Scene scene = new Scene(root, 1600, 600);
  primaryStage.setScene(scene);
  scene.getStylesheets().add(getClass().getResource("style.css").toExternalForm());
  primaryStage.initStyle(StageStyle.UNDECORATED);
  primaryStage.setMaximized(true);
  primaryStage.setResizable(true);


  primaryStage.getIcons().add(new Image("card/resources/logo-icon.png"));
  primaryStage.show();

    //adding resize and drag primary stage
    ResizeHelper.addResizeListener(primaryStage);



  //assign ALT+ENTER to maximize window
  final KeyCombination kb = new KeyCodeCombination(KeyCode.ENTER, KeyCombination.CONTROL_DOWN);
  scene.addEventHandler(KeyEvent.KEY_PRESSED, new EventHandler<KeyEvent>() {
    @Override
    public void handle(KeyEvent event) {
      if (kb.match(event)) {
        primaryStage.setMaximized(!primaryStage.isMaximized());
        primaryStage.setResizable(true);

      }
    }
  });

} catch (Exception e) {
  e.printStackTrace();
}

}

}

控制器中有一个标签和一个按钮。当我单击按钮时,将调用一个方法,并出现带有第二个控制器的新窗口(FontController):

@FXML private Button btnFont;
@FXML  private Label category1
@FXML
 void changeFont(ActionEvent event) {
   try {
  FXMLLoader fxmlLoader = new 
FXMLLoader(getClass().getResource("font.fxml"));
  Parent rootFont = (Parent) fxmlLoader.load();
  Stage stage = new Stage();
  stage.setTitle("Select Font");
  stage.setScene(new Scene(rootFont));
  stage.show();    

} catch (Exception e) {
  System.out.println("can't load new window");
}

}

FontCOntroller中有“确定”按钮和标签:

@FXML  private Label fontLabel;
@FXML  private Button btnFontOk;

请告诉我,当我单击Burtton“确定”以在Controller中进行标签时,如何发送和应用FontController中的标签文本?

Controller

FontController

1 个答案:

答案 0 :(得分:1)

解决方案:

我在项目目录中创建了“上下文”类,以使所有控制器相互通信。您可以在其中添加任意数量的控制器。

这里看起来像:

package card;


public class Context {
  private final static Context instance = new Context();
  public static Context getInstance() {
    return instance;
  }

  private Controller controller;
  public void setController(Controller controller) {
    this.controller=controller;
  }

  public Controller getController() {
    return controller;
  }

  private FontController fontController;
  public void setFontController(FontController fontController) {
    this.fontController=fontController;
  }

  public FontController getFontController() {
    return fontController;
  }
}

控制器:

我为要更改的标签创建了吸气剂和吸气剂(ALT +在IDEA中插入)

public Label getCategory1() {
    return category1;
  }

  public void setCategory1(Label category1) {
    this.category1 = category1;
  }

要通过Context类获取FontController变量和方法,我放置了代码行

//getting FontController through Context Class
  FontController fontCont = Context.getInstance().getFontController();

我通过我的initialize方法在Context类中注册了Controller(我的类实现了Initializable)

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

    //register Controller in  Context Class
    Context.getInstance().setController(this);

  }

FontController:

要获取控制器变量和方法,请放置以下代码:

//getting Controller variables and methods through Context class
  Controller cont = Context.getInstance().getController();

我还通过初始化方法在Context类中注册了FontController:

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

    //register FontController in  Context Class
    Context.getInstance().setFontController(this);
}

当我单击按钮时,将文本和文本颜色从此FontController中的标签发送到Controller中的标签的方法:

@FXML
  void applyFont(ActionEvent event) {
    cont.getCategory1().setText(fontLabel.getText());
    cont.getCategory1().setTextFill(fontLabel.getTextFill());
  }

*通过创建Context类,可以使控制器彼此通信,并在其中创建任意数量的控制器。控制器看到彼此的变量和方法