javaFX：带有单选按钮的listview [英] javaFX:listview with Radio Button

问题描述

我有一个列表，其中包含带有列表项的 RadioButton 的项目。

I have a list with items which should carry RadioButton with list items.

ListView 是一个可观察的 ArrayList ，其中包含我希望添加单选按钮的数据单元格列表视图中的每个项目。

the ListView is an observable ArrayList with data I want to add radio Button with each item in list View.

推荐答案

创建自定义 ListCell 并将ListCell的图形设置为 RadioButton 。如果需要，您可以在 updateItem（）中添加更多功能。

Create a custom ListCell and set the graphic of the ListCell to a RadioButton. You can add more functionality inside updateItem() if required.

输出

完整示例

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.ListCell;
import javafx.scene.control.ListView;
import javafx.scene.control.RadioButton;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class RadioButtonListView extends Application {

    public static final ObservableList names =
            FXCollections.observableArrayList();
    private ToggleGroup group = new ToggleGroup();

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("List View Sample");

        final ListView listView = new ListView();
        listView.setPrefSize(200, 250);
        listView.setEditable(true);

        names.addAll(
                "Adam", "Alex", "Alfred", "Albert",
                "Brenda", "Connie", "Derek", "Donny",
                "Lynne", "Myrtle", "Rose", "Rudolph",
                "Tony", "Trudy", "Williams", "Zach"
        );

        listView.setItems(names);
        listView.setCellFactory(param -> new RadioListCell());

        StackPane root = new StackPane();
        root.getChildren().add(listView);
        primaryStage.setScene(new Scene(root, 200, 250));
        primaryStage.show();
    }

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

    private class RadioListCell extends ListCell<String> {
        @Override
        public void updateItem(String obj, boolean empty) {
            super.updateItem(obj, empty);
            if (empty) {
                setText(null);
                setGraphic(null);
            } else {
                RadioButton radioButton = new RadioButton(obj);
                radioButton.setToggleGroup(group);
                // Add Listeners if any
                setGraphic(radioButton);
            }
        }
    }
}

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