import 'dart:math';

import 'package:flutter/material.dart';

/// create by 张风捷特烈 on 2020-04-10
/// contact me by email 1981462002@qq.com
/// 说明:

enum FeedMode {
  scale,
  fade,
  rotate,
}

class FeedbackWidget extends StatefulWidget {
  final Widget child;
  final FeedMode mode;
  final Duration duration;
  final Function() onPressed;
  final a;

  FeedbackWidget(
      {@required this.child,
      this.mode = FeedMode.scale,
      this.a = 0.9,
      this.duration = const Duration(milliseconds: 150),
      @required this.onPressed});

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

class _FeedBackState extends State<FeedbackWidget>
    with SingleTickerProviderStateMixin {
  AnimationController _controller;
  var rate = 1.0;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(vsync: this, duration: widget.duration)
      ..addListener(() {
        setState(() => rate = (widget.a - 1) * _controller.value + 1);
      })
      ..addStatusListener((s) {
        if (s == AnimationStatus.completed) {
          _controller.reverse();
        }
      });
  }

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

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        _controller.forward();
        if(widget.onPressed!=null){
          widget.onPressed();
        }
      },
      child: _buildByMode(widget.child, widget.mode),
    );
  }

  Widget _buildByMode(Widget child, FeedMode mode) {
    switch (mode) {
      case FeedMode.scale:
        return Transform.scale(scale: rate, child: widget.child);
      case FeedMode.fade:
        return Opacity(opacity: rate, child: widget.child);
      case FeedMode.rotate:
        return Transform.rotate(angle: rate * pi * 2, child: widget.child);
    }
    return Container();
  }
}