| // 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. |
| |
| // Flutter code sample for [NestedScrollView]. |
| |
| import 'package:flutter/material.dart'; |
| |
| void main() => runApp(const MyApp()); |
| |
| class MyApp extends StatelessWidget { |
| const MyApp({super.key}); |
| |
| static const String _title = 'Flutter Code Sample'; |
| |
| @override |
| Widget build(BuildContext context) { |
| return const MaterialApp( |
| title: _title, |
| home: MyStatelessWidget(), |
| ); |
| } |
| } |
| |
| class MyStatelessWidget extends StatelessWidget { |
| const MyStatelessWidget({super.key}); |
| |
| @override |
| Widget build(BuildContext context) { |
| return Scaffold( |
| body: NestedScrollView( |
| // Setting floatHeaderSlivers to true is required in order to float |
| // the outer slivers over the inner scrollable. |
| floatHeaderSlivers: true, |
| headerSliverBuilder: |
| (BuildContext context, bool innerBoxIsScrolled) { |
| return <Widget>[ |
| SliverAppBar( |
| title: const Text('Floating Nested SliverAppBar'), |
| floating: true, |
| expandedHeight: 200.0, |
| forceElevated: innerBoxIsScrolled, |
| ), |
| ]; |
| }, |
| body: ListView.builder( |
| padding: const EdgeInsets.all(8), |
| itemCount: 30, |
| itemBuilder: (BuildContext context, int index) { |
| return SizedBox( |
| height: 50, |
| child: Center(child: Text('Item $index')), |
| ); |
| }))); |
| } |
| } |