import 'package:flutter/material.dart';

void main() {
  runApp(const MaterialApp(home: Home()));
}

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

  @override
  State<Home> createState() => _HomeState();
}

class _HomeState extends State<Home> {
  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 2,
      child: Builder(builder: (context) {
        return Scaffold(
          bottomNavigationBar: BottomNavigationBar(
            currentIndex: DefaultTabController.of(context).index,
            onTap: (int value) {
              setState(() {
                DefaultTabController.of(context).animateTo(value);
              });
            },
            items: const <BottomNavigationBarItem>[
              BottomNavigationBarItem(
                label: "NestedScrollViewPage",
                icon: Icon(Icons.home),
              ),
              BottomNavigationBarItem(
                label: "ListViewPage",
                icon: Icon(Icons.home),
              ),
            ],
          ),
          backgroundColor: Colors.white,
          body: const TabBarView(
            physics: NeverScrollableScrollPhysics(),
            children: <Widget>[
              NestedScrollViewPage(),
              ListViewPage(),
            ],
          ),
        );
      }),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return ListView(
      physics: const ClampingScrollPhysics(),
      children: <Widget>[
        AppBar(
          title: const Text("Physics working"),
        ),
        for (int index = 0; index < 5; ++index)
          Card(
            child: ListTile(
              onTap: () {},
              leading: const Icon(Icons.search),
              title: Text(index.toString()),
            ),
          ),
      ],
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return NestedScrollView(
      physics: const ClampingScrollPhysics(),
      headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) => <Widget>[
        const SliverAppBar(
          pinned: false,
          title: Text("Physics not working"),
        ),
      ],
      body: Builder(
        builder: (BuildContext context) => CustomScrollView(
          slivers: <Widget>[
            SliverList(
              delegate: SliverChildBuilderDelegate(
                (context, index) => Card(
                  child: ListTile(
                    onTap: () {},
                    leading: const Icon(Icons.search),
                    title: Text(index.toString()),
                  ),
                ),
                childCount: 5,
              ),
            ),
          ],
        ),
      ),
    );
  }
}