// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/material.dart';

void main() {
  runApp(const MyWidget());
}

class MyWidget extends StatefulWidget {
  const MyWidget({super.key});

  @override
  State<MyWidget> createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  bool? _value;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Column(
          children: <Widget>[
            Radio<bool>(
              value: true,
              groupValue: _value,
              toggleable: true,
              onChanged: (bool? value) {
                setState(() {
                  // Toggle the value when the radio button is pressed
                  _value = value;
                });
              },
              activeColor: Colors.red,
              fillColor: MaterialStateProperty.resolveWith<Color>((Set<MaterialState> states) {
                if (states.contains(MaterialState.selected)) {
                  return Colors.green;
                }
                return Colors.blue; // Default color when not selected
              }),
              backgroundColor: MaterialStateProperty.resolveWith<Color>((
                Set<MaterialState> states,
              ) {
                if (states.contains(MaterialState.selected)) {
                  return Colors.orange.withOpacity(0.5);
                }
                return Colors.purple.withOpacity(0.5); // Default background color when not selected
              }),
            ),
            Radio<bool>(
              value: false,
              groupValue: _value,
              toggleable: true,
              onChanged: (bool? value) {
                setState(() {
                  // Toggle the value when the radio button is pressed
                  _value = value;
                });
              },
            ),
          ],
        ),
      ),
    );
  }
}