import 'package:flutter/material.dart';

// 旋转动画
class AnimationForRotation extends StatefulWidget {
  final Duration duration;
  final bool play;
  final Widget child;

  const AnimationForRotation({
    Key? key,
    required this.duration,
    required this.child,
    this.play = true,
  }) : super(key: key);

  @override
  State<AnimationForRotation> createState() => _AnimationForRotation();
}

class _AnimationForRotation extends State<AnimationForRotation> with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  late bool isStop = false;

  @override
  void dispose() {
    // Widget销毁时，必须销毁动画
    _controller.dispose();
    super.dispose();
  }

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(duration: const Duration(milliseconds: 600), vsync: this);
    _controller.repeat();
  }

  @override
  Widget build(BuildContext context) {
    if(widget.play == false){ // 动画暂停
      setState(()=>isStop = true);
      _controller.stop();
    }else if(isStop == true){ // 继续动画
      setState(()=>isStop = false);
      _controller.repeat();
    }

    return RotationTransition(
      alignment: Alignment.center,
      turns: _controller,
      child: widget.child,
    );
  }
}