JavaFX - 如何为选项卡内的文本字段设置值？

Question

我正在尝试将值设置为选项卡内的文本字段。我有多个选项卡，我想为每个选项卡内的文本字段设置值。知道如何设置选项卡内文本字段的文本吗？我正在使用下面的代码来更新文本字段的值，但尝试执行相同操作时没有任何反应。

代码:

public class FXMLController {
    @FXML
    private Button inputXmlFileBtn;
    @FXML
    private TextField inputXmlName;
    @FXML
    private TabPane xmlData;
    @FXML
    private Tab vendorHeaderFb;
    @FXML
    private TextField vendorHeader1;
    Label label;

    public String inputXmlFileChooser() throws ParserConfigurationException,
            SAXException, IOException, JAXBException {
        FileChooser fileChooser = new FileChooser();
        // Set extension filter
        fileChooser.getExtensionFilters().addAll(
                new ExtensionFilter("XML files (*.xml)", "*.xml"));

        // Open Dialog
        File file = fileChooser.showOpenDialog(null);
        String xmlPath = "";
        xmlPath = file.getPath();

        // Set the path for inputXmlName text field
        if (file != null) {
            inputXmlName.setText(xmlPath);
        }

        //Unmarshall
        label = this.unmarshallXml();
        System.out.println(label.getVendorHeader1());
        vendorHeaderFb = new Tab();
        vendorHeader1 = new TextField();
        vendorHeader1.setText(label.getVendorHeader1());
        vendorHeaderFb.setContent(vendorHeader1);
        return xmlPath;
    }

更新了代码，包括 FXML 的 Pojo 类。

public class FXMLController {
    @FXML
    private Button inputXmlFileBtn;
    @FXML
    private TextField inputXmlName;
    @FXML
    private TabPane xmlData;
    @FXML
    private Tab vendorHeaderFb;
    @FXML
    private TextField VendorHeader1;
    Label label;

    public String inputXmlFileChooser() throws ParserConfigurationException,
            SAXException, IOException, JAXBException {
        FileChooser fileChooser = new FileChooser();
        // Set extension filter
        fileChooser.getExtensionFilters().addAll(
                new ExtensionFilter("XML files (*.xml)", "*.xml"));

        // Open Dialog
        File file = fileChooser.showOpenDialog(null);
        String xmlPath = "";
        xmlPath = file.getPath();

        // Set the path for inputXmlName text field
        if (file != null) {
            inputXmlName.setText(xmlPath);
        }

        //Unmarshall
        label = this.unmarshallXml();
        System.out.println(label.getVendorHeader1());
        FXMLProps fxmlProps = new FXMLProps();
        fxmlProps.setVendorHeader1(label.getVendorHeader1());
        System.out.println(fxmlProps.getVendorHeader1());
        VendorHeader1 = new TextField();
        VendorHeader1.setText(fxmlProps.getVendorHeader1());
        //vendorHeaderFb.setContent(vendorHeader1);
        //vendorHeader1.setText(label.getVendorHeader1());
        //vendorHeaderFb.setContent(vendorHeader1);


        return xmlPath;
    }

POJO/属性类

public class FXMLProps {
    private final SimpleStringProperty VendorHeader1 = new SimpleStringProperty(
            "");

    public FXMLProps() {
    }

    public FXMLProps(String VendorHeader1) {
        setVendorHeader1(VendorHeader1);
    }

    public String getVendorHeader1() {
        return VendorHeader1.get();
    }

    public void setVendorHeader1(String vH1) {
        VendorHeader1.set(vH1);
    }
}

我仍然无法设置文本字段vendorHeader1 的值。有人能指出出了什么问题吗？

Answer 1

您必须在 TextField 的文本属性和用于该值的 SimpleStringProperty 之间应用 Binding。您必须以在其他类中启用 Binding 选项的方式将 FXMLProps 的供应商 header 属性公开:

public class FXMLProps {

    private final SimpleStringProperty vendorHeader = new SimpleStringProperty("");

    public FXMLProps() {}

    public FXMLProps(String vendorHeader) {
        setVendorHeader(vendorHeader);
    }

    public String getVendorHeader() {
        return VendorHeader1.get();
    }

    public void setVendorHeader(String vendorHeaderText) {
        vendorHeader.set(vendorHeaderText);
    }

    // this is needed for the Binding
    public final SimpleStringProperty vendorHeaderProperty() {
        return vendorHeader;
    }
}

然后在您的应用程序中的某个位置(可能在 start() 中)您需要创建 Binding ，例如

// bind those two properties (TextField, SimpleStringProperty)
Bindings.bindBidirectional(vendorHeader1.textProperty(), fxmlProps.vendorHeaderProperty());