dev/integration_tests/flutter_gallery/lib/demo/material/expansion_tile_list_demo.dart

// 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';

import '../../gallery/demo.dart';

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

  static const String routeName = '/material/expansion-tile-list';

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Expand/collapse list control'),
        actions: <Widget>[MaterialDemoDocumentationButton(routeName)],
      ),
      body: Scrollbar(
        child: ListView(
          primary: true,
          children: <Widget>[
            const ListTile(title: Text('Top')),
            ExpansionTile(
              title: const Text('Sublist'),
              backgroundColor: Theme.of(context).colorScheme.secondary.withOpacity(0.025),
              children: const <Widget>[
                ListTile(title: Text('One')),
                ListTile(title: Text('Two')),
                // https://en.wikipedia.org/wiki/Free_Four
                ListTile(title: Text('Free')),
                ListTile(title: Text('Four')),
              ],
            ),
            const ListTile(title: Text('Bottom')),
          ],
        ),
      ),
    );
  }
}