Андрей Делимарский

import 'package:flutter/material.dart';

class PlayPauseButton extends StatefulWidget {
  final bool isPlaying;
  final VoidCallback onPressed;

  PlayPauseButton({required this.isPlaying, required this.onPressed});

  @override
  _PlayPauseButtonState createState() => _PlayPauseButtonState();
}

class _PlayPauseButtonState extends State<PlayPauseButton> with SingleTickerProviderStateMixin {
  late AnimationController _animationController;
  late Animation<double> _animation;

  @override
  void initState() {
    super.initState();
    _animationController = AnimationController(
      duration: Duration(milliseconds: 300),
      vsync: this,
    );
    _animation = Tween<double>(begin: 0.0, end: 1.0).animate(_animationController);
  }

  @override
  void dispose() {
    _animationController.dispose();
    super.dispose();
  }

  @override
  void didUpdateWidget(covariant PlayPauseButton oldWidget) {
    super.didUpdateWidget(oldWidget);
    if (widget.isPlaying) {
      _animationController.forward();
    } else {
      _animationController.reverse();
    }
  }

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: widget.onPressed,
      child: Container(
        width: 50,
        height: 50,
        decoration: BoxDecoration(
          shape: BoxShape.circle,
          color: Colors.transparent,
        ),
        child: Stack(
          children: [
            Center(
              child: Container(
                width: 40,
                height: 40,
                decoration: BoxDecoration(
                  shape: BoxShape.circle,
                  color: Colors.black,
                ),
              ),
            ),
            Center(
              child: ScaleTransition(
                scale: _animation,
                child: Icon(
                  widget.isPlaying ? Icons.pause : Icons.play_arrow,
                  size: 30,
                  color: Colors.white,
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class MyApp extends StatefulWidget {
  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  bool? isLoggedIn;

  Future<void> checkLoggedIn() async {
    final SharedPreferences prefs = await SharedPreferences.getInstance();
    bool? isLoggedIn = prefs.getBool('isLogin');

    this.setState(() {
      isLoggedIn = isLoggedIn;
    });
  }

  @override
  void initState() {
    super.initState();
    Future.microtask(() async => await checkLoggedIn());
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'MY APP',
      debugShowCheckedModeBanner: false,
      scrollBehavior: MyCustomScrollBehavior(),
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        body: SingleChildScrollView(child:
            isLoggedIn != null?
                    isLoggedIn! 
                        ? Main()
                        : Login()
                    : OpenScreen()
        ),
      ),
    );
  }
}

channel = discord.utils.get(member.guild.channels, name="Имя")