liangchengyou / wow_english

  import 'package:common_utils/common_utils.dart';
  import 'package:flutter/foundation.dart';
  import 'package:flutter/material.dart';
  import 'package:video_player/video_player.dart';

  import 'package:wow_english/common/extension/string_extension.dart';

  import 'package:wow_english/video/lookvideo/widgets/video_opera_widget.dart';
  
  class VideoWidget extends StatefulWidget {
    const VideoWidget({super.key, this.videoUrl = ''});
  
    final String videoUrl;
  
    @override
    State<StatefulWidget> createState() {
      return _VideoWidgetState();
    }
  }
  
  class _VideoWidgetState extends State<VideoWidget> {
    VideoPlayerController? _controller;
    String _currentTime = '00:00';
    String _totalTime = '00:00';
    double _playDegree = 0.0;
    bool _hiddenTipView = false;
    TimerUtil? timerUtil;
  
    String formatDuration(Duration duration) {
      String hours = duration.inHours.toString().padLeft(2, '0');
      String minutes = duration.inMinutes.remainder(60).toString().padLeft(2, '0');
      String seconds = duration.inSeconds.remainder(60).toString().padLeft(2, '0');
      return "$hours:$minutes:$seconds";
    }
  
    void _addListener() {
      _controller!.addListener(() {
        if(_controller!.value.isInitialized) {
          if (_controller!.value.isPlaying) {
            setState(() {
              double currentSecond = (_controller!.value.position.inMinutes.remainder(60)*60+_controller!.value.position.inSeconds.remainder(60)).toDouble();
              int totalSecond = _controller!.value.duration.inMinutes.remainder(60)*60+_controller!.value.duration.inSeconds.remainder(60);
              _currentTime = formatDuration(_controller!.value.position);
              _playDegree = currentSecond/totalSecond;
            });
          }
        }
      });
    }
  
    //开始倒计时
    void startTimer()  {
      if(timerUtil == null) {
        timerUtil =  TimerUtil(mInterval: 1000,mTotalTime: 1000*10);
        timerUtil!.setOnTimerTickCallback((int tick) {
          double currentTick = tick / 1000;
          if (kDebugMode) {
            print(currentTick);
          }
          if (currentTick.toInt() == 0) {//倒计时结束
            setState(() {
              _hiddenTipView = true;
            });
            timerUtil!.cancel();
            timerUtil = null;
          }
        });
        timerUtil!.startCountDown();
      }
    }
  
    //取消倒计时
    void cancelTimer() {
      timerUtil!.cancel();
      timerUtil = null;
    }
  

    void actionType(OperationType type) async {
      if (type == OperationType.back) {
        Navigator.pop(context);
      } else if (type == OperationType.playState) {
        if (_controller!.value.isPlaying) {
          _controller!.pause();
        } else {
          _controller!.play();
        }
        setState(() {
  
        });
      }
    }
  

    @override
    void initState() {
      super.initState();
      _controller = VideoPlayerController.network(widget.videoUrl)
        ..initialize().then((_){
          startTimer();
          setState(() {
            _currentTime = formatDuration(_controller!.value.position);
            _totalTime = formatDuration(_controller!.value.duration);
            _controller!.setLooping(true);
            _controller!.setVolume(100);
            _controller!.play();
          });
          _addListener();
        });
    }
  
    @override
    Widget build(BuildContext context) {
      return GestureDetector(
        onTap: () {
          setState(() {
            _hiddenTipView = !_hiddenTipView;
            if(!_hiddenTipView) {
              startTimer();
            } else {
              if (timerUtil!.isActive()) {
                cancelTimer();
              }
            }
          });
        },
        onDoubleTap: () {
          if(_controller!.value.isInitialized) {
            if (_controller!.value.isPlaying) {
              _controller!.pause();
            } else {
              _controller!.play();
            }

            setState(() {
  
            });

          }
        },
        child: Center(
          child: _controller!.value.isInitialized ? Stack(
            alignment: Alignment.center,
            children: [
              SizedBox(
                height: double.infinity,
                width: double.infinity,
                child: AspectRatio(
                  aspectRatio: _controller!.value.aspectRatio,
                  child: VideoPlayer(_controller!),
                ),
              ),
              Offstage(
                offstage: _hiddenTipView,
                child: VideoOperaWidget(
                  currentTime: _currentTime,
                  totalTime: _totalTime,
                  degree: _playDegree,

                  isPlay: _controller!.value.isPlaying,
                  actionEvent: (OperationType type) {
                    actionType(type);
                  },

                  sliderChangeEvent: (double degree) {
                    int totalSecond = _controller!.value.duration.inMinutes.remainder(60)*60+_controller!.value.duration.inSeconds.remainder(60);
                    int positionSecond = (totalSecond * degree).toInt();
                    _controller!.seekTo(Duration(seconds: positionSecond));
                  },

                ),
              ),
              Offstage(
                offstage: _controller!.value.isPlaying,
                child: IconButton(
                  onPressed: () {
                    _controller!.play();
                  },
                  icon: Image.asset(
                    'video_stop'.assetPng,
                    width: 70,
                    height: 70,
                  ),

                ),
              )
            ],
          ): Container(

            color: Colors.white,

          ),
        ),
      );
    }
  
    @override
    void dispose() {
      _controller?.dispose();
      _controller?.removeListener(() {});
      if (timerUtil != null) {
        timerUtil!.cancel();
        timerUtil = null;
      }
      super.dispose();
    }
  }