JavaFX数据管理[副本]

Question

场景1及其Scene1Controller！它有一个文本字段（客户名称）和一个按钮！

输入“stackoverflow”到屏幕键盘的textfield！

在屏幕键盘中按enter键后，如何将屏幕键盘的textfield值检索到场景1的customer name字段中？

场景一：

<TextField fx:id="CustomerName" layoutX="14.0" layoutY="75.0" onAction="#TextBoxTextChanged" prefHeight="29.0" prefWidth="254.0"/>
<Button fx:id="OnScreenKeyBoardButton" layoutX="268.0" layoutY="75.0" mnemonicParsing="false" onAction="#ButtonNameClick" prefHeight="29.0" text="..." />

<Button fx:id="enterButton" layoutX="796.0" layoutY="210.0" minHeight="18.8" mnemonicParsing="false" prefHeight="40.0" prefWidth="90.0" text="Enter" onAction="#ButtonEnterClick"/>

@FXML
public void ButtonNameClick(final ActionEvent event)
{
  //opens on-screen keyboard
}

屏幕键盘控制器：

@FXML
public void ButtonEnterClick(final ActionEvent event)
{
  //code to be written to get the text field of the on-screen keyboard into the textfield of scene 1
}

Answer 1

只需在键盘控制器中创建一个属性来表示文本，并从“Screen1Controller”中观察：

public class KeyboardController {
    private StringProperty text = new SimpleStringProperty(this, "text", "");
    public StringProperty textProperty() {
         return text ;
    }
    public String getText() {
        return text.get();
    }
    public void setText(String text) {
        this.text.set(text);
    }

    @FXML
    public void buttonEnterClick(ActionEvent event) {
        text.set(// text from keyboard) ;
    }
    // ... everything else as before
}

而且

public class Screen1Controller {
    @FXML
    private TextField customerName ;
    // ...
    @FXML
    public void buttonNameClick(ActionEvent event) {
        FXMLLoader loader = new FXMLLoader(getClass().getResource("Keyboard.fxml"));
        Parent parent = loader.load();
        KeyboardController controller = (KeyboardContoller) loader.getController();
        controller.textProperty().addListener(new ChangeListener<String>() {
            @Override
            public void changed(ObservableValue<? extends String> obs, String oldValue, String newValue) {
                // update text field with newValue:
                customerName.setText(newValue);
            }
        });
        // show keyboard ...
    }

    // other code...
}