ﾄﾞｩﾙﾙﾙﾙﾙﾙﾙﾙ

crazy.dart

import 'package:flutter_web/material.dart';
import 'package:flutter_web_ui/ui.dart' as ui;
import 'dart:math' as math;

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'ドゥルルルルルル',
      home: Scaffold(
        appBar: AppBar(
          title: Text('ドゥルルルルルル'),
        ),
        body: Center(
          child: CrazyMan(),
        ),
      ),
    );
  }
}

class CrazyMan extends StatefulWidget {
  @override
  _CrazyManState createState() => _CrazyManState();
}

class _CrazyManState extends State<CrazyMan> with TickerProviderStateMixin {
  AnimationController _armController;
  AnimationController _bodyController;
  Animation<double> _bodyAnimation;

  @override
  void initState() {
    super.initState();
    _armController = AnimationController(
      duration: const Duration(milliseconds: 500),
      vsync: this,
    )..repeat();

    _bodyController = AnimationController(
      duration: const Duration(milliseconds: 2500),
      vsync: this,
    );
    _bodyAnimation = Tween<double>(begin: 0, end: 600).animate(_bodyController)
      ..addListener(() => setState(() {}));
    _bodyController.repeat();
  }

  @override
  Widget build(BuildContext context) {
    return Transform.translate(
      offset: Offset(_bodyAnimation.value, 0),
      child: _buildCrazy(context),
    );
  }

  Widget _buildCrazy(BuildContext context) {
    return AnimatedBuilder(
      animation: _armController,
      builder: (context, child) {
        return Row(
          children: <Widget>[
            const Text('三('),
            Transform.rotate(
              angle: _armController.value * 2.0 * math.pi,
              origin: Offset.zero,
              child: Text('卍'),
            ),
            const Text('^o^)'),
            Transform.rotate(
              angle: _armController.value * 2.0 * math.pi,
              origin: Offset.zero,
              child: Text('卍'),
            ),
            const Text('ﾄﾞｩﾙﾙﾙﾙﾙﾙﾙﾙ'),
          ],
        );
      },
    );
  }

  @override
  void dispose() {
    _armController.dispose();
    _bodyController.dispose();
    super.dispose();
  }
}

Future<void> main() async {
  await ui.webOnlyInitializePlatform();

  runApp(MyApp());
}