simplex-chat/packages/simplex_app/lib/main.dart

import 'package:flutter/material.dart';
import 'package:simplex_chat/app_routes.dart';
import 'package:simplex_chat/constants.dart';
import 'package:simplex_chat/views/onBoarding/intro_view.dart';
import 'package:simplex_chat/views/setup_profile_view.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'SimpleX Chat',
      theme: ThemeData(
        primarySwatch: Colors.teal,
        primaryColor: kPrimaryColor,
        accentColor: kPrimaryColor,
      ),
      builder: (context, widget) {
        return ScrollConfiguration(
          behavior: ScrollBehaviorModified(),
          child: widget!,
        );
      },
      initialRoute: AppRoutes.intro,
      routes: <String, WidgetBuilder>{
        AppRoutes.intro: (_) => IntroView(),
        AppRoutes.setupProfile: (_) => SetupProfileView(),
      },
    );
  }
}

class ScrollBehaviorModified extends ScrollBehavior {
  const ScrollBehaviorModified();
  @override
  ScrollPhysics getScrollPhysics(BuildContext context) {
    switch (getPlatform(context)) {
      case TargetPlatform.iOS:
      case TargetPlatform.macOS:
      case TargetPlatform.android:
        return const BouncingScrollPhysics();
      case TargetPlatform.fuchsia:
      case TargetPlatform.linux:
      case TargetPlatform.windows:
        return const ClampingScrollPhysics();
    }
  }
}