import 'package:flutter/gestures.dart' show debugPrintGestureArenaDiagnostics;
import 'package:flutter/material.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  final ScrollController _scrollController = ScrollController();
  final TextEditingController _textEditingController = TextEditingController();

  @override
  void initState() {
    super.initState();
    debugPrintGestureArenaDiagnostics = true;

    Future.delayed(const Duration(milliseconds: 3000), () {
      _textEditingController.text =
          'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt '
          'ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco '
          'laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in '
          'voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat '
          'non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\n\n' * 10;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          const Text('Wait for it...'),
          Expanded(
            child: Scrollbar(
              controller: _scrollController,
              child: ScrollConfiguration(
                behavior: ScrollConfiguration.of(context).copyWith(
                  scrollbars: false,
                  physics: const BouncingScrollPhysics(),
                ),
                child: TextField(
                  controller: _textEditingController,
                  scrollController: _scrollController,
                  maxLines: null,
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }
}