我是JavaFX的新手,而且对于我的跳棋游戏,我想要显示谁在我的棋盘上方。我已经阅读了多个非常相似的问题,但它似乎并没有让我想到我想去的地方。我希望你能帮助我!
我有一个包含以下代码的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>
在我的主要:
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());
}
}
我的游戏数据有一个BooleanProperty来显示它是谁。每次成功移动后都会发生变化。
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();
}
据我所知,我需要将Label绑定到我在initialize方法中完成的值。但是当我玩游戏并改变游戏类中的值时,标签保持不变。如何更新标签?我想我需要添加一个更改监听器,但我不知道该怎么做,更具体地说是在哪里。
非常感谢你的帮助!我缩短了我的代码并希望它还不会太长。
最佳, 丽莎
答案 0 :(得分:1)
在initialize
中:labelTurn.textProperty().setValue(setLabelText());
不是绑定,它是属性上的一个简单集。一个非常奇怪的问题setLabelText()
设置Label
的文本,并返回已设置的字符串,该值再次用于Label
的文本。
您可以创建一个真正的绑定:
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()));