import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'ReorderableListView in a Drawer'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);
  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  List itemList = [
    {'name': 'Item 1'},
    {'name': 'Item 2'},
    {'name': 'Item 3'},
    {'name': 'Item 4'},
    {'name': 'Item 5'},
    {'name': 'Item 6'},
    {'name': 'Item 7'},
    {'name': 'Item 8'},
    {'name': 'Item 9'},
    {'name': 'Item 10'},
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      backgroundColor: Colors.grey.shade700,
      body: SafeArea(
        child: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                'Open the drawer on the left',
                style: Theme.of(context)
                    .textTheme
                    .bodyLarge
                    ?.copyWith(color: Colors.white),
              ),
            ],
          ),
        ),
      ),
      drawer: Drawer(
        child: SafeArea(
          child: Column(
            children: [
              DrawerHeader(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: [
                    Text(
                      'ReorderableListView',
                      style: Theme.of(context).textTheme.headlineSmall,
                    ),
                    const SizedBox(
                      height: 16,
                    ),
                    Text(
                      'With one finger drag an item\nand at the same time, with another finger,\ntap outside the drawer',
                      style: Theme.of(context).textTheme.bodySmall,
                    ),
                  ],
                ),
              ),
              Expanded(
                child: ReorderableListView(
                  padding: EdgeInsets.zero,
                  scrollDirection: Axis.vertical,
                  shrinkWrap: false,
                  buildDefaultDragHandles: true,
                  onReorder: (int oldIndex, int newIndex) {
                    setState(
                      () {
                        if (oldIndex < newIndex) {
                          newIndex -= 1;
                        }
                        final item = itemList.removeAt(oldIndex);
                        itemList.insert(newIndex, item);
                      },
                    );
                  },
                  children: [
                    for (var i in itemList)
                      ListTile(
                        tileColor: Colors.transparent,
                        key: ValueKey(i['name']),
                        leading: const Icon(Icons.dashboard_rounded),
                        title: Text(
                          i['name'],
                        ),
                        trailing: const Icon(Icons.drag_handle),
                        dense: false,
                      ),
                  ],
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}