多个 FXML 文件，每个文件都有控制器 - 附加后 TextArea 无法正确显示文本

Question

我想将我的 FXML 分成更小的文件，每个文件都有自己的控制器。在 main 中，我为每个控制器创建实例并访问textAreaSample并尝试附加文本。我没有看到文字正在改变。为什么？Alert正在显示来自此的文本TextArea：alert.setContentText(textAreaSample.getText());我不知道如何设置所有 fxml 文件和控制器。我应该如何设置这一切？这是我的主要“sample.fxml”文件：<GridPane fx:controller="sample.ControllerSample"      xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">    <fx:include fx:id="sending" source="Sending.fxml" GridPane.columnIndex="0" GridPane.rowIndex="0"/>    <TextArea fx:id="textAreaSample" prefWidth="200" prefHeight="200"          GridPane.columnIndex="1" GridPane.rowIndex="0" text="Sample">    </TextArea></GridPane>及其控制器：public class ControllerSample {    @FXML    private TextArea textAreaSample;    public ControllerSample() {}    public TextArea getTextAreaSample() {        return textAreaSample;    }    public void setTextAreaSample(TextArea textAreaSample) {        this.textAreaSample = textAreaSample;    }}现在我有Sending.fxml文件：<GridPane fx:controller="sample.ControllerSending"          xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">        <fx:include fx:id="sendingPhotos" source="SendingPhotos.fxml" GridPane.columnIndex="0" GridPane.rowIndex="0"/></GridPane>及其控制器：public class ControllerSending {    public ControllerSending() {}}这是SendingPhotos.fxml代码：<TextArea xmlns="http://javafx.com/javafx"      xmlns:fx="http://javafx.com/fxml"      fx:controller="sample.ControllerSendingPhotos" fx:id="textAreaSendingPhotos" prefWidth="200" prefHeight="200"      text="Photos"/>和控制器：public class ControllerSendingPhotos {    @FXML    private TextArea textAreaSendingPhotos;    public ControllerSendingPhotos() {}    public TextArea getTextAreaSendingPhotos() {        return textAreaSendingPhotos;    }    public void setTextAreaSendingPhotos(TextArea textAreaSendingPhotos) {        this.textAreaSendingPhotos = textAreaSendingPhotos;    }}

Answer 1

要访问textArea嵌套的 fxml，您必须更改控制器：

public class ControllerSample {

    @FXML

    private TextArea textAreaSample;

    @FXML

    private ControllerSending sendingController;

    public ControllerSample() {

    }

    public TextArea getTextAreaSample() {

        return textAreaSample;

    }

    public void setTextAreaSample(TextArea textAreaSample) {

        this.textAreaSample = textAreaSample;

    }

    protected ControllerSending getSendingController() {

        return sendingController;

    }

}

public class ControllerSending {

    @FXML

    private ControllerSendingPhotos sendingPhotosController;

    public ControllerSending() {

    }

    protected ControllerSendingPhotos getSendingPhotosController() {

        return sendingPhotosController;

    }

}

public class Main extends Application {

    @Override

    public void start(Stage primaryStage) throws Exception {

        FXMLLoader loaderSample = new FXMLLoader(getClass().getResource("sample.fxml"));

        Parent root = loaderSample.load();

        ControllerSample controllerSample = (ControllerSample) loaderSample.getController();

        TextArea textAreaSample = controllerSample.getTextAreaSample();

        textAreaSample.setText("\ndebug textAreaSample\n");

        TextArea textAreaSendingPhotos = controllerSample.getSendingController().getSendingPhotosController()

            .getTextAreaSendingPhotos();

        textAreaSendingPhotos.setText("test test test");

        primaryStage.setTitle("Hello World");

        primaryStage.setScene(new Scene(root, 800, 400));

        primaryStage.show();

    }

    public static void main(String[] args) {

        launch(args);

    }

}