liangchengyou / wow_english

  import 'package:flutter/material.dart';
  import 'package:lottie/lottie.dart';
  import 'package:wow_english/common/widgets/throttledGesture_gesture_detector.dart';
  
  import '../../utils/log_util.dart';
  
  /// 录音组件
  class RecorderWidget extends StatefulWidget {
    final bool isClickable;
    final bool isPlaying;
    final VoidCallback? onTap;
    final double width;
    final double height;
  
    const RecorderWidget({
      Key? key,

      this.isClickable = true,

      required this.isPlaying,
      required this.onTap,
      required this.width,
      required this.height,
    }) : super(key: key);
  
    @override
    _RecorderWidgetState createState() => _RecorderWidgetState();
  }
  
  class _RecorderWidgetState extends State<RecorderWidget>
      with SingleTickerProviderStateMixin {
    late final AnimationController _controller;

    late final Future<LottieComposition> _futureComposition;

    static const String TAG = "RecorderWidget";
  
    bool _isPlaying = false;
  
    @override
    void initState() {
      super.initState();
      _controller = AnimationController(vsync: this);
      _loadComposition();

      if (widget.isPlaying) {
        _playInitialAnimation();
      }

  
      _controller.addListener(() {
        // Log.d("$TAG addListener _controller=${_controller.status}");
      });
    }
  

    @override
    void didUpdateWidget(RecorderWidget oldWidget) {
      super.didUpdateWidget(oldWidget);
      Log.d(

          "$TAG ${identityHashCode(this)} didUpdateWidget widget=${widget.isPlaying} oldWidget=${oldWidget.isPlaying} _isPlaying=$_isPlaying");

      if (widget.isPlaying && !_isPlaying) {
        setState(() {
          _isPlaying = true;
        });

        _playInitialAnimation();

      } else if (!widget.isPlaying && _isPlaying) {
        _playFinalAnimation();

      }
    }
  

    Future<void> _loadComposition() async {
      _futureComposition =
          AssetLottie('assets/lotties/recorder_input.zip').load();
    }
  

    void _playInitialAnimation() {
      _controller.reset();

      _futureComposition.then((composition) {
        _controller.duration = composition.duration;
        _controller
            .animateTo(22 / composition.endFrame)
            .whenComplete(() => _loopMiddleAnimation(composition));
      });

    }
  

    void _loopMiddleAnimation(LottieComposition composition) {

      _controller.repeat(

        min: 22 / composition.endFrame,
        max: 37 / composition.endFrame,

      );
    }
  
    void _playFinalAnimation() {
      _controller.stop();

      _futureComposition.then((composition) {
        _controller.duration = composition.duration;
        _controller
            .animateTo(50 / composition.endFrame)
            .whenComplete(() => _resetAnimation());
      });

    }
  
    void _resetAnimation() {

      if (mounted) {
        setState(() {
          _isPlaying = false;
          _controller.value = 0;
        });
      }

    }
  
    @override

    void dispose() {
      _controller.dispose();
      super.dispose();
    }
  
    @override
    Widget build(BuildContext context) {
      return ThrottledGestureDetector(
        onTap: widget.isClickable ? widget.onTap : null,
        child: Opacity(

            opacity: widget.isClickable ? 1.0 : 0.5, // 设置透明度
            child: FutureBuilder<LottieComposition>(
                future: _futureComposition,
                builder: (context, snapshot) {
                  if (snapshot.hasData) {
                    final composition = snapshot.data!;
                    return Lottie(
                      composition: composition,
                      controller: _controller,
                      renderCache: RenderCache.raster,
                      width: widget.width,
                      height: widget.height,
                    );
                  } else {
                    return const SizedBox.shrink();
                  }
                })),

      );
    }
  }