JavaFX TitledPane需要多次单击才能展开，场景不会更新

Question

我遇到了一个奇怪的问题/错误，其中TitledPane第一次单击时不会扩展，它需要多次单击才能扩展。除此之外，嵌套的TitledPanes根本不会扩展，除非您多次单击它们并在选项卡之间切换。

所以代码可以正常工作，但不能正常工作。

如果专家可以判断出它是错误还是我做错了，那将是很大的帮助。谢谢！

package subtables;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Accordion;
import javafx.scene.control.Label;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.scene.control.TextField;
import javafx.scene.control.TitledPane;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class Subtables extends Application
{

    @Override
    public void start(Stage primaryStage)
    {
        Accordion accordion = new Accordion();

        TitledPane pane = new TitledPane();
        VBox root = new VBox();

        HBox titles = new HBox();
        titles.setPadding(new Insets(5, 5, 5, 24));
        titles.getChildren().add(getTextField());
        titles.getChildren().add(getTextField());
        titles.getChildren().add(getTextField());
        titles.getChildren().add(getTextField());
        titles.getChildren().add(getTextField());
        titles.getChildren().add(getTextField());

        FlowPane graphic = new FlowPane();
        graphic.getChildren().add(getTextField());
        graphic.getChildren().add(getTextField());
        graphic.getChildren().add(getTextField());
        graphic.getChildren().add(getTextField());
        graphic.getChildren().add(getTextField());
        graphic.getChildren().add(getTextField());

        pane.setGraphic(graphic);

        pane.setOnMouseClicked((e) ->
        {
            TabPane tabPane = new TabPane();
            Tab tab1 = new Tab("Sub Table 1", getSubWindow());
            Tab tab2 = new Tab("Sub Table 2", new Label("Text inside a tab."));
            Tab tab3 = new Tab("Sub Table 3", new Label("Text inside a tab."));
            Tab tab4 = new Tab("Sub Table 4", new Label("Text inside a tab."));

            tabPane.getTabs().add(tab1);
            tabPane.getTabs().add(tab2);
            tabPane.getTabs().add(tab3);
            tabPane.getTabs().add(tab4);

            VBox vBox = new VBox(tabPane);
            pane.setContent(vBox);
        });

        accordion.getPanes().add(pane);
        root.getChildren().add(titles);
        root.getChildren().add(accordion);

        primaryStage.setTitle("Hello World!");
        Scene scene = new Scene(root, 640, 480);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public TextField getTextField()
    {
        TextField textField = new TextField();
        textField.setPromptText("Value");
        textField.setPrefWidth(50);
        return textField;
    }

    public VBox getSubWindow()
    {
        Accordion accordion = new Accordion();

        TitledPane pane = new TitledPane();
        VBox root = new VBox();

        HBox titles = new HBox();
        titles.setPadding(new Insets(5, 5, 5, 24));
        titles.getChildren().add(getTextField());
        titles.getChildren().add(getTextField());
        titles.getChildren().add(getTextField());
        titles.getChildren().add(getTextField());
        titles.getChildren().add(getTextField());
        titles.getChildren().add(getTextField());

        FlowPane graphic = new FlowPane();
        graphic.getChildren().add(getTextField());
        graphic.getChildren().add(getTextField());
        graphic.getChildren().add(getTextField());
        graphic.getChildren().add(getTextField());
        graphic.getChildren().add(getTextField());
        graphic.getChildren().add(getTextField());

        pane.setGraphic(graphic);
        pane.setOnMouseClicked((e) ->
        {
            TabPane tabPane = new TabPane();
            Tab tab1 = new Tab("Sub Table 1", getSubWindow());
            Tab tab2 = new Tab("Sub Table 2", new Label("Text inside a tab."));
            Tab tab3 = new Tab("Sub Table 3", new Label("Text inside a tab."));
            Tab tab4 = new Tab("Sub Table 4", new Label("Text inside a tab."));

            tabPane.getTabs().add(tab1);
            tabPane.getTabs().add(tab2);
            tabPane.getTabs().add(tab3);
            tabPane.getTabs().add(tab4);

            VBox vBox = new VBox(tabPane);
            pane.setContent(vBox);
        });

        accordion.getPanes().add(pane);
        root.getChildren().add(titles);
        root.getChildren().add(accordion);

        return root;
    }

    /**
     * Main function to launch the application.
     */
    public static void main(String[] args)
    {
        launch(args);
    }

}

Answer 1

找到了解决方法！

1. 将setOnMouseClicked()更改为setOnMousePressed()以修正其扩展所需的多次单击。
2. 添加VBox.setVgrow(tabPane, Priority.ALWAYS);和VBox.setVgrow(accordion, Priority.ALWAYS);，以便TitledPane刷新而无需在选项卡之间切换。