ListView的自定义CellFactory

Question

我想为ListView实现自定义CellFactory：

  import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.ListCell;
import javafx.scene.control.ListView;
import javafx.scene.input.MouseButton;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Priority;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.Callback;

public class MainApp extends Application
{
    ListView<String> list = new ListView<String>();
    ObservableList<String> data = FXCollections.observableArrayList(
        "Option 1",
        "Option 2",
        "Option 3",
        "Option 4",
        "Option 5"
    );

    @Override
    public void start(Stage stage)
    {
        VBox box = new VBox();
        Scene scene = new Scene(box, 200, 200);
        stage.setScene(scene);
        stage.setTitle("ListViewSample");
        box.getChildren().addAll(list);
        VBox.setVgrow(list, Priority.ALWAYS);

        list.setItems(data);

        list.setCellFactory(new Callback<ListView<String>, ListCell<String>>()
        {
            @Override
            public ListCell<String> call(ListView<String> list)
            {
                return new ColorRectCell();
            }
        }
        );

        stage.show();
    }

    class ColorRectCell extends ListCell<String>
    {
        public ColorRectCell()
        {
            addEventHandler(MouseEvent.MOUSE_CLICKED, new EventHandler<MouseEvent>()
            {
                @Override
                public void handle(MouseEvent mouseEvent)
                {
                    if (mouseEvent.getButton().equals(MouseButton.PRIMARY) && !isEmpty())
                    {
                        if (mouseEvent.getClickCount() == 2)
                        {
                            System.out.println(">>>>>>>>> Clicked");
                        }
                    }
                }
            });
        }

        @Override
        public void updateItem(String item, boolean empty)
        {
            super.updateItem(item, empty);
            if (item != null)
            {
                setText(item);

            }
        }
    }

    public static void main(String[] args)
    {
        launch(args);
    }
}

我想激活双击监听器，只有当我点击带有文本的行时，如果行是空的则跳过它。将双击监听器实现到CellFactory的正确方法是什么？