import 'package:flutter/material.dart';
import 'dart:io' show Platform;

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: ExampleWidget(),
      ),
    );
  }
}

class ExampleWidget extends StatelessWidget {
  ExampleWidget({super.key});

  @override
  Widget build(BuildContext context) {
    return Center(
        child: ElevatedButton(
            onPressed: () {
              showSimpleDialog(context)
                  .then((value) => print('Dialog closed with $value'));
            },
            child: const Text('Open')));
  }

  Future<bool> showSimpleDialog(BuildContext context) {
    final Future<dynamic> future = showDialog(
      context: context,
      builder: (ctx) => SimpleDialog(
        contentPadding: const EdgeInsets.all(12),
        children: [
          const Text('Do you really want to exit?'),
          const SizedBox(height: 24),
          createActionRow(ctx),
        ],
      ),
    );
    return Future(() => future.then((value) => value as bool));
  }

  final buttonDirection =
      Platform.isWindows ? TextDirection.rtl : TextDirection.ltr;

  Widget createActionRow(BuildContext context) {
    return Row(
      children: [
        const Spacer(),
        Row(
          textDirection: buttonDirection,
          children: [
            TextButton(
              onPressed: () => Navigator.pop(context, false),
              child: const Text('Cancel'),
            ),
            TextButton(
              onPressed: () => Navigator.pop(context, true),
              child: const Text('Ok'),
            ),
          ],
        ),
      ],
    );
  }
}