2017-05-11 182 views
2

我對JavaFX和我的跳棋遊戲都是超級新手,我想要展示誰將它置於我的主板之上。我已經閱讀了多個非常類似的問題,但它似乎並沒有讓我想去哪裏。我希望你可以幫助我!根據布爾值更改標籤JavaFX

我有下面的代碼FXML文件:

<HBox fx:id="topBox" alignment="TOP_CENTER" prefHeight="45.0" prefWidth="200.0" spacing="10.0" BorderPane.alignment="CENTER" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.SampleController"> 
    <children> 
     <Label fx:id="labelTurn" text="test" /> 
     <Button fx:id="buttonResign" alignment="CENTER" mnemonicParsing="false" onAction="#doResign" prefHeight="25.0" prefWidth="80.0" text="Resign" /> 
    </children> 
    </HBox> 

在我的主:

public class Main extends Application { 

    Checkers content = new Checkers(); 
    BorderPane border = new BorderPane(); 

    @Override 
    public void start(Stage primaryStage) throws Exception { 
     try { 
      border.setTop(FXMLLoader.load(getClass().getResource("Sample.fxml"))); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
     border.setCenter(createContent()); 
     Scene scene = new Scene(border); 
     primaryStage.setTitle("Checkers from main"); 
     primaryStage.setScene(scene); 
     primaryStage.show(); 
    } 

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

我的控制器:

public class SampleController { 
    @FXML 
    private Label labelTurn; 

    @FXML 
    private HBox topBox; 

    @FXML 
    private Button buttonResign; 

    private Checkers content = new Checkers(); 

    @FXML 
    void doResign(ActionEvent event) { 
     content.resign(); 
     // System.exit(0); //TODO eine tatsächliche Methode eingeben!! 

    } 

    public void setLabelTurn(Label labelTurn) { 
     this.labelTurn = labelTurn; 

     String setLabelText() { 
     String s = " "; 
     if (content.getWhiteTurnPropValue()) { 
      labelTurn.setText("White, it is your turn."); 
      s = "White, it is your turn."; 
      return s; 
     } else { 
      labelTurn.setText("Black, it is your turn."); 
      s = "Black, it is your turn."; 
      return s; 
     } 
    } 
    @FXML 
    void initialize() { 
     assert buttonResign != null : "fx:id=\"buttonResign\" was not injected: check your FXML file 'Sample.fxml'."; 
     assert topBox != null : "fx:id=\"topBox\" was not injected: check your FXML file 'Sample.fxml'."; 
     assert labelTurn != null : "fx:id=\"labelTurn\" was not injected: check your FXML file 'Sample.fxml'."; 
     labelTurn.textProperty().setValue(setLabelText()); 
    } 
} 

我的遊戲數據有BooleanProperty展示誰是它。它在每次成功移動後都會改變。

BooleanProperty whiteTurnProp = new SimpleBooleanProperty(true); 

public BooleanProperty getWhiteTurnProp() { 
    return whiteTurnProp; 
} 

public void setWhiteTurnPropValue(Boolean whiteTurn) { 
    this.whiteTurnProp.setValue(whiteTurn); 
} 

public boolean getWhiteTurnPropValue() { 
    return this.whiteTurnProp.getValue(); 
} 

據我所知,我需要將Label綁定到我在初始化方法中完成的值。但是當我玩牌時,我的遊戲類中的價值發生了變化,標籤保持不變。我如何更新標籤?我想我需要添加一個更改監聽器的東西,但我不知道如何做到這一點,更具體地說在哪裏。

非常感謝您的幫助!我縮短了我的代碼,希望它不會太長。

最佳, 麗莎

回答

1

initializelabelTurn.textProperty().setValue(setLabelText());是沒有約束力,這是對物業進行簡單的設置。一個非常奇怪的setLabelText()設置Label的文本,並返回已設置的字符串,該值再次用於Label的文本。

您可以創建一個真正的結合,而不是:

labelTurn.textProperty().bind(Bindings.createStringBinding(() -> { 
    String s = " "; 
    if (content.getWhiteTurnProp().get()) 
     s = "White, it is your turn."; 
    else 
     s = "Black, it is your turn."; 

    return s; 
}, content.getWhiteTurnProp())); 
+0

謝謝!這很好用! – Lisa