Hibok/lib/utils/PicSwiper.dart

import 'dart:async';
import 'dart:io';
import 'dart:math';
import 'package:chat/data/UserData.dart';
import 'package:chat/data/WebData.dart';
import 'package:chat/data/constants.dart';
import 'package:chat/generated/i18n.dart';
import 'package:chat/home/VipPage.dart';
import 'package:chat/models/money_change.dart';
import 'package:chat/utils/CustomUI.dart';
import 'package:chat/utils/HttpUtil.dart';
import 'package:chat/utils/MessageMgr.dart';
import 'package:chat/utils/TokenMgr.dart';
import 'package:chat/utils/flutter_windowmanager.dart';
import 'package:chat/utils/screen.dart';
import 'package:dio/dio.dart';
import 'package:extended_image/extended_image.dart';
import 'dart:ui' as ui;
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:provider/provider.dart';
import 'ChargeMoney.dart';

double initScale({Size imageSize, Size size, double initialScale}) {
  var n1 = imageSize.height / imageSize.width;
  var n2 = size.height / size.width;
  if (n1 > n2) {
    final FittedSizes fittedSizes =
        applyBoxFit(BoxFit.contain, imageSize, size);
    //final Size sourceSize = fittedSizes.source;
    Size destinationSize = fittedSizes.destination;
    return size.width / destinationSize.width;
  } else if (n1 / n2 < 1 / 4) {
    final FittedSizes fittedSizes =
        applyBoxFit(BoxFit.contain, imageSize, size);
    //final Size sourceSize = fittedSizes.source;
    Size destinationSize = fittedSizes.destination;
    return size.height / destinationSize.height;
  }

  return initialScale;
}

class PicSwiper extends StatefulWidget {
  final int id;
  final List<PicSwiperItem> pics;
  PicSwiper({this.id, this.pics});
  @override
  _PicSwiperState createState() => _PicSwiperState();
}

class _PicSwiperState extends State<PicSwiper>
    with SingleTickerProviderStateMixin {
  var rebuildIndex = StreamController<int>.broadcast();
  var rebuildSwiper = StreamController<bool>.broadcast();
  AnimationController _animationController;
  Animation<double> _animation;
  Function animationListener;

//  CancellationToken _cancelToken;
//  CancellationToken get cancelToken {
//    if (_cancelToken == null || _cancelToken.isCanceled)
//      _cancelToken = CancellationToken();
//
//    return _cancelToken;
//  }
  List<double> doubleTapScales = <double>[1.0, 2.0];
  GlobalKey<ExtendedImageSlidePageState> slidePagekey =
      GlobalKey<ExtendedImageSlidePageState>();
  int currentIndex;
  bool _showSwiper = true;
  int _seconds = 0;
  bool isMyself = false;
  @override
  void initState() {
    setDisableScreenshots();
    for (int i = 0; i < widget.pics.length; i++) {
      if (widget.id == widget.pics[i].id) {
        currentIndex = i;
        break;
      }
    }
    isMyself = widget.pics[0].userId == UserData().basicInfo.userId;
    _animationController = AnimationController(
        duration: const Duration(milliseconds: 150), vsync: this);

    super.initState();
  }

  setDisableScreenshots() async {
    print('Platform.isAndroid ${Platform.isAndroid}');
    if (Platform.isAndroid) {
      await FlutterWindowManager.addFlags(FlutterWindowManager.FLAG_SECURE);
    }
  }

  clearFalgs() async {
    if (Platform.isAndroid) {
      await FlutterWindowManager.clearFlags(FlutterWindowManager.FLAG_SECURE);
    }
  }

  @override
  void dispose() {
    rebuildIndex.close();
    rebuildSwiper.close();
    _animationController?.dispose();
    clearGestureDetailsCache();
    clearFalgs();
    //cancelToken?.cancel();
    super.dispose();
  }

  void browsePhoto(id, userId, type, callback, {price = 0}) async {
    if (Provider.of<MoneyChangeProvider>(context).money < price) {
      CustomUI.buildOneConfirm(context, I18n.of(context).balance_insufficien,
          I18n.of(context).recharge, () {
        Navigator.of(context).pop();
        ChargeMoney.showChargeSheet(context, () {
          setState(() {});
        });
      });
      return;
    }
    var data = {
      "visitUserId": UserData().basicInfo.userId,
      "userId": userId,
      "pId": id,
      'type': type,
    };
    data['sign'] = TokenMgr().getSign(data);
    data['price'] = price;
    Response res = await HttpUtil().post('user/browse/photo', data: data);
    Map resData = res.data;
    print(resData);
    if (resData['code'] == 0) {
      MessageMgr().emit('refresh_photo', id);
      callback();
    }
  }

  @override
  Widget build(BuildContext context) {
    var size = MediaQuery.of(context).size;
    bool isAgree = (widget.pics[currentIndex].type == PhotoType.destroy.index ||
        widget.pics[currentIndex].type == PhotoType.destroyMoney.index);
    var id = widget.pics[currentIndex].id;
    Widget result = Scaffold(
        // StreamBuilder(
        //   builder: (BuildContext context, data) {},
        //   initialData: true,
        //   stream: rebuildSwiper.stream,
        // ),
        appBar: AppBar(
          backgroundColor: AppColors.NewAppbarBgColor,
          title: StreamBuilder<int>(
            builder: (BuildContext context, data) {
              return Text(
                '${data.data + 1} / ${widget.pics.length}',
                style: TextStyle(
                    fontSize: 16, color: AppColors.NewAppbarTextColor),
                textScaleFactor: 1.0,
              );
            },
            initialData: currentIndex,
            stream: rebuildIndex.stream,
          ),
          leading: CustomUI.buildCustomLeading(context),
          centerTitle: true,
          elevation: 1,
          actions: <Widget>[
            isMyself
                ? InkWell(
                    onTap: () {
                      CustomUI.buildOneConfirm(
                          context,
                          I18n.of(context).sure_delete,
                          I18n.of(context).determine, () {
                        var id = widget.pics[currentIndex].id;
                        HttpUtil().setPhote(context, id, 2, () {
                          widget.pics.removeAt(currentIndex);
                          MessageMgr().emit('refresh_photo', id);
                          if (widget.pics.length == 0) {
                            Navigator.of(context).pop();
                          } else {
                            setState(() {
                              if (currentIndex != 0) currentIndex--;
                            });
                          }
                        });
                        Navigator.of(context).pop();
                      });
                    },
                    child: Container(
                        margin: EdgeInsets.only(right: 10),
                        child: CircleAvatar(
                            backgroundColor: Constants.GreyBackgroundColor,
                            radius: 13.75,
                            child: Icon(
                              Icons.delete,
                              color: Constants.BlackTextColor,
                              size: 20,
                            ))),
                  )
                : Container()
          ],
        ),
        backgroundColor: Colors.black,

        /// if you use ExtendedImageSlidePage and slideType =SlideType.onlyImage,
        /// make sure your page is transparent background
        // color: Colors.white,
        // shadowColor: Colors.transparent,
        bottomNavigationBar: isMyself
            ? Container(
                decoration: BoxDecoration(
                    color: Colors.white,
                    border: Border(top: Constants.GreyBorderSide)),
                height: 40,
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.start,
                  children: <Widget>[
                    Checkbox(
                      value: isAgree,
                      activeColor: Colors.blue,
                      onChanged: (bool val) {
                        HttpUtil().setPhote(context, id, isAgree ? 0 : 1, () {
                          this.setState(() {
                            isAgree = !isAgree;
                            //如果是红包照片焚阅照片则变成红包照片
                            //如果是普通焚阅照片则变成普通照片
                            MessageMgr().emit('refresh_photo');
                            if (isAgree) {
                              if (widget.pics[currentIndex].type ==
                                  PhotoType.free.index) {
                                widget.pics[currentIndex].type =
                                    PhotoType.destroy.index;
                              }
                              if (widget.pics[currentIndex].type ==
                                  PhotoType.money.index) {
                                widget.pics[currentIndex].type =
                                    PhotoType.destroyMoney.index;
                              }
                            } else {
                              if (widget.pics[currentIndex].type ==
                                  PhotoType.destroy.index) {
                                widget.pics[currentIndex].type =
                                    PhotoType.free.index;
                              }
                              if (widget.pics[currentIndex].type ==
                                  PhotoType.destroyMoney.index) {
                                widget.pics[currentIndex].type =
                                    PhotoType.money.index;
                              }
                            }
                          });
                        });
                      },
                    ),
                    fixedText(I18n.of(context).destroy_after)
                  ],
                ),
              )
            : Container(
                height: 0,
              ),
        body: Stack(
          //fit: StackFit.expand,
          children: <Widget>[
            ExtendedImageGesturePageView.builder(
              itemBuilder: (BuildContext context, int index) {
                var item = widget.pics[index];
                var picUrl = item.picUrl;
                var file = item.file;
                var _timer;

                bool isShow = _seconds != 0;

                _cancelTimer() {
                  item.isWatch = true;
                  _seconds = 0;
                  _timer?.cancel();
                }

                _startTimer() {
                  if (UserData().isMan()) {
                    _seconds =
                        UserData().isSuperVip ? 6 : (UserData().isVip ? 4 : 2);
                  } else {
                    _seconds = UserData().basicInfo.isAttestation ? 6 : 2;
                  }

                  _timer =
                      new Timer.periodic(new Duration(seconds: 1), (timer) {
                    _seconds--;

                    setState(() {});
                    if (_seconds <= 0) {
                      _cancelTimer();
                    }
                  });
                }

                Widget image;
                if (file != null) {
                  image = ExtendedImage.file(
                    file,
                    fit: BoxFit.contain,
                    //enableSlideOutPage: true,
                    mode: ExtendedImageMode.gesture,
                    initGestureConfigHandler: (state) {
                      double initialScale = 1.0;

                      if (state.extendedImageInfo != null &&
                          state.extendedImageInfo.image != null) {
                        initialScale = initScale(
                            size: size,
                            initialScale: initialScale,
                            imageSize: Size(
                                state.extendedImageInfo.image.width.toDouble(),
                                state.extendedImageInfo.image.height
                                    .toDouble()));
                      }
                      return GestureConfig(
                          inPageView: true,
                          initialScale: initialScale,
                          maxScale: max(initialScale, 5.0),
                          initialAlignment: InitialAlignment.topCenter,
                          animationMaxScale: max(initialScale, 5.0),
                          //you can cache gesture state even though page view page change.
                          //remember call clearGestureDetailsCache() method at the right time.(for example,this page dispose)
                          cacheGesture: false);
                    },
                    onDoubleTap: (ExtendedImageGestureState state) {
                      //you can use define pointerDownPosition as you can,
                      //default value is double tap pointer down postion.
                      var pointerDownPosition = state.pointerDownPosition;
                      double begin = state.gestureDetails.totalScale;
                      double end;

                      //remove old
                      _animation?.removeListener(animationListener);

                      //stop pre
                      _animationController.stop();

                      //reset to use
                      _animationController.reset();

                      if (begin == doubleTapScales[0]) {
                        end = doubleTapScales[1];
                      } else {
                        end = doubleTapScales[0];
                      }

                      animationListener = () {
                        //print(_animation.value);
                        state.handleDoubleTap(
                            scale: _animation.value,
                            doubleTapPosition: pointerDownPosition);
                      };
                      _animation = _animationController
                          .drive(Tween<double>(begin: begin, end: end));

                      _animation.addListener(animationListener);

                      _animationController.forward();
                    },
                  );
                } else {
                  image = ExtendedImage.network(
                    picUrl,
                    fit: BoxFit.contain,
                    // enableSlideOutPage: true,
                    mode: ExtendedImageMode.gesture,
                    initGestureConfigHandler: (state) {
                      double initialScale = 1.0;

                      if (state.extendedImageInfo != null &&
                          state.extendedImageInfo.image != null) {
                        initialScale = initScale(
                            size: size,
                            initialScale: initialScale,
                            imageSize: Size(
                                state.extendedImageInfo.image.width.toDouble(),
                                state.extendedImageInfo.image.height
                                    .toDouble()));
                      }
                      return GestureConfig(
                          inPageView: true,
                          initialScale: initialScale,
                          maxScale: max(initialScale, 5.0),
                          initialAlignment: InitialAlignment.topCenter,
                          animationMaxScale: max(initialScale, 5.0),
                          //you can cache gesture state even though page view page change.
                          //remember call clearGestureDetailsCache() method at the right time.(for example,this page dispose)
                          cacheGesture: false);
                    },
                    onDoubleTap: (ExtendedImageGestureState state) {
                      //you can use define pointerDownPosition as you can,
                      //default value is double tap pointer down postion.
                      var pointerDownPosition = state.pointerDownPosition;
                      double begin = state.gestureDetails.totalScale;
                      double end;

                      //remove old
                      _animation?.removeListener(animationListener);

                      //stop pre
                      _animationController.stop();

                      //reset to use
                      _animationController.reset();

                      if (begin == doubleTapScales[0]) {
                        end = doubleTapScales[1];
                      } else {
                        end = doubleTapScales[0];
                      }

                      animationListener = () {
                        //print(_animation.value);
                        state.handleDoubleTap(
                            scale: _animation.value,
                            doubleTapPosition: pointerDownPosition);
                      };
                      _animation = _animationController
                          .drive(Tween<double>(begin: begin, end: end));

                      _animation.addListener(animationListener);

                      _animationController.forward();
                    },
                  );
                }

                image = GestureDetector(
                  child: Container(
                    child: image,
                  ),
                  onTap: () {
                    slidePagekey.currentState.popPage();
                    Navigator.pop(context);
                  },
                );
                //滤镜背景
                var bg = Center(
                  child: ClipRect(
                    //裁切长方形
                    child: BackdropFilter(
                      //背景滤镜器
                      filter: ui.ImageFilter.blur(
                          sigmaX: 20.0, sigmaY: 20.0), //图片模糊过滤，横向竖向都设置5.0
                      child: Opacity(
                        //透明控件
                        opacity: 0.5,
                        child: Container(
                          alignment: Alignment.center,
                          width: Screen.width,
                          height: Screen.height,
                          color: Colors.black,
                        ),
                      ),
                    ),
                  ),
                );

                //焚阅照片
                if ((item.type == PhotoType.destroy.index ||
                        item.type == PhotoType.destroyMoney.index &&
                            item.isBuy) &&
                    item.userId != UserData().basicInfo.userId) {
                  image = GestureDetector(
                      onLongPress: item.isWatch
                          ? null
                          : () {
                              browsePhoto(item.id, item.userId, 1, () {
                                _startTimer();
                                setState(() {});
                              });
                            },
                      onLongPressEnd: item.isWatch
                          ? null
                          : (detail) {
                              _cancelTimer();
                              setState(() {});
                            },
                      onTap: () {
                        slidePagekey.currentState.popPage();
                        Navigator.pop(context);
                      },
                      child: Container(
                          color: Colors.grey.shade200,
                          child: Stack(
                            alignment: Alignment.center,
                            children: <Widget>[
                              image,
                              isShow
                                  ? Container()
                                  : Stack(
                                      alignment: Alignment.center,
                                      children: <Widget>[
                                        bg,
                                        item.isWatch
                                            ? Container(
                                                height: 211,
                                                width: 275.5,
                                                decoration: BoxDecoration(
                                                    color: Colors.white,
                                                    borderRadius:
                                                        BorderRadius.all(
                                                            Radius.circular(
                                                                5))),
                                                child: Column(
                                                  mainAxisAlignment:
                                                      MainAxisAlignment.center,
                                                  children: <Widget>[
                                                    Icon(
                                                      IconData(
                                                        0xe634,
                                                        fontFamily: 'iconfont',
                                                      ),
                                                      color: const Color(
                                                          0xFFA7A7A7),
                                                      size: 50,
                                                    ),
                                                    fixedText(
                                                        I18n.of(context)
                                                            .destroyed,
                                                        fontSize: 16,
                                                        color: const Color(
                                                            0xFFA7A7A7)),
                                                    UserData().isVip ||
                                                            UserData()
                                                                    .basicInfo
                                                                    .sex ==
                                                                2
                                                        ? Container()
                                                        : fixedText(
                                                            I18n.of(context)
                                                                .longTime,
                                                            color: Colors
                                                                .grey[700],
                                                            fontSize: 12),
                                                    UserData().isVip ||
                                                            UserData()
                                                                    .basicInfo
                                                                    .sex ==
                                                                2
                                                        ? Container()
                                                        : SizedBox(height: 10),
                                                    UserData().isVip ||
                                                            UserData()
                                                                    .basicInfo
                                                                    .sex ==
                                                                2
                                                        ? Container()
                                                        : RaisedButton(
                                                            color: Colors.blue,
                                                            onPressed: () {
                                                              Navigator.of(
                                                                      context)
                                                                  .push(
                                                                new MaterialPageRoute(
                                                                  builder:
                                                                      (context) {
                                                                    return VipPage();
                                                                  },
                                                                ),
                                                              );
                                                            },
                                                            child: fixedText(
                                                                I18n.of(context)
                                                                    .joinvip,
                                                                color: Colors
                                                                    .white),
                                                          )
                                                  ],
                                                ))
                                            : Container(
                                                height: 211,
                                                width: 275.5,
                                                decoration: BoxDecoration(
                                                    color: Colors.white,
                                                    borderRadius:
                                                        BorderRadius.all(
                                                            Radius.circular(
                                                                5))),
                                                child: Column(
                                                  mainAxisAlignment:
                                                      MainAxisAlignment.start,
                                                  children: <Widget>[
                                                    Padding(
                                                        padding:
                                                            EdgeInsets.only(
                                                                top: 10,
                                                                bottom: 2),
                                                        child: Icon(
                                                          IconData(
                                                            0xe634,
                                                            fontFamily:
                                                                'iconfont',
                                                          ),
                                                          color: const Color(
                                                              0xFFF44236),
                                                          size: 50,
                                                        )),
                                                    fixedText(
                                                        I18n.of(context)
                                                            .destroy_after,
                                                        color: const Color(
                                                            0xFFF44236),
                                                        fontSize: 15),
                                                    Padding(
                                                      padding: EdgeInsets.only(
                                                          top: 25, bottom: 15),
                                                      child: fixedText(
                                                          I18n.of(context)
                                                              .longClick,
                                                          color: const Color(
                                                              0xFFFA8880),
                                                          fontSize: 12),
                                                    ),
                                                    Image.asset(
                                                      'assets/images/zhiwen.png',
                                                      height: 55,
                                                    )
                                                  ],
                                                ))
                                      ],
                                    )
                            ],
                          )));
                }

                //红包照片
                if ((item.type == PhotoType.money.index ||
                        (item.type == PhotoType.destroyMoney.index &&
                            !item.isBuy)) &&
                    item.userId != UserData().basicInfo.userId) {
                  image = GestureDetector(
                      onTap: () {
                        slidePagekey.currentState.popPage();
                        Navigator.pop(context);
                      },
                      child: Container(
                          color: Colors.grey.shade200,
                          child: Stack(
                            alignment: Alignment.center,
                            children: <Widget>[
                              image,
                              item.isBuy
                                  ? Container()
                                  : Stack(
                                      alignment: Alignment.center,
                                      children: <Widget>[
                                        bg,
                                        Stack(
                                          alignment: Alignment.center,
                                          children: <Widget>[
                                            Image.asset(
                                              'assets/images/login/money.png',
                                              fit: BoxFit.fitWidth,
                                              width: 220,
                                            ),
                                            Container(
                                              margin: EdgeInsets.only(top: 65),
                                              child: fixedText(
                                                  I18n.of(context)
                                                      .less_coin
                                                      .replaceFirst(
                                                          '/s1',
                                                          UserData()
                                                              .redPhotoPrice
                                                              .toString()),
                                                  color:
                                                      const Color(0xFFFAE6B4),
                                                  fontSize: 25),
                                            ),
                                            InkWell(
                                                onTap: () {
                                                  CustomUI.buildOneConfirm(
                                                      context,
                                                      I18n.of(context)
                                                          .pay_unlock
                                                          .replaceFirst(
                                                              '/s1',
                                                              UserData()
                                                                  .redPhotoPrice
                                                                  .toString()),
                                                      I18n.of(context)
                                                          .confirm_pay, () {
                                                    browsePhoto(
                                                        item.id, item.userId, 2,
                                                        () {
                                                      setState(() {
                                                        Navigator.of(context)
                                                            .pop();
                                                        MessageMgr().emit(
                                                            'refresh_photo',
                                                            item.id);
                                                        item.isBuy = true;
                                                      });
                                                    },
                                                        price: UserData()
                                                            .redPhotoPrice);
                                                  });
                                                },
                                                child: Container(
                                                  decoration: BoxDecoration(
                                                      color: const Color(
                                                          0xFFFAE6B4),
                                                      borderRadius:
                                                          BorderRadius.all(
                                                              Radius.circular(
                                                                  30))),
                                                  padding: EdgeInsets.only(
                                                      left: 40,
                                                      right: 40,
                                                      top: 5,
                                                      bottom: 5),
                                                  margin:
                                                      EdgeInsets.only(top: 140),
                                                  child: fixedText(
                                                      I18n.of(context)
                                                          .determine,
                                                      color: const Color(
                                                          0xFF7B0408)),
                                                ))
                                          ],
                                        )
                                      ],
                                    )
                            ],
                          )));
                }

                if (index == currentIndex) {
                  return Hero(
                    tag: picUrl + index.toString(),
                    child: image,
                    flightShuttleBuilder: (BuildContext flightContext,
                        Animation<double> animation,
                        HeroFlightDirection flightDirection,
                        BuildContext fromHeroContext,
                        BuildContext toHeroContext) {
                      final Hero hero =
                          flightDirection == HeroFlightDirection.pop
                              ? fromHeroContext.widget
                              : toHeroContext.widget;
                      return hero.child;
                    },
                  );
                } else {
                  return image;
                }
              },
              itemCount: widget.pics.length,
              onPageChanged: (int index) {
                currentIndex = index;
                rebuildIndex.add(index);
              },
              controller: PageController(
                initialPage: currentIndex,
              ),
              scrollDirection: Axis.horizontal,
              physics: BouncingScrollPhysics(),
            ),
            _seconds == 0
                ? Container()
                : Container(
                    padding: EdgeInsets.only(bottom: 30),
                    alignment: Alignment.bottomCenter,
                    child: Stack(
                      alignment: Alignment.center,
                      children: <Widget>[
                        CircularProgressIndicator(
                          strokeWidth: 4.0,
                          backgroundColor: Colors.grey,
                          value: _seconds / 6,
                          valueColor:
                              new AlwaysStoppedAnimation<Color>(Colors.red),
                        ),
                        fixedText(_seconds.toString(), color: Colors.red)
                        // Positioned(
                        //   top: 8,
                        //   left: 13,
                        //   child:
                        //       fixedText(_seconds.toString(), color: Colors.red),
                        // )
                      ],
                    )),
          ],
        ));

    result = ExtendedImageSlidePage(
      key: slidePagekey,
      child: result,
      slideAxis: SlideAxis.both,
      slideType: SlideType.onlyImage,
      onSlidingPage: (state) {
        ///you can change other widgets' state on page as you want
        ///base on offset/isSliding etc
        //var offset= state.offset;
        var showSwiper = !state.isSliding;
        if (showSwiper != _showSwiper) {
          // do not setState directly here, the image state will change,
          // you should only notify the widgets which are needed to change
          // setState(() {
          // _showSwiper = showSwiper;
          // });

          _showSwiper = showSwiper;
          rebuildSwiper.add(_showSwiper);
        }
      },
    );

    return result;
  }
}

class MySwiperPlugin extends StatelessWidget {
  final List<PicSwiperItem> pics;
  final int index;
  final StreamController<int> reBuild;
  final bool isMyself;
  final callback;
  MySwiperPlugin(
      this.pics, this.index, this.reBuild, this.isMyself, this.callback);
  @override
  Widget build(BuildContext context) {
    return StreamBuilder<int>(
      builder: (BuildContext context, data) {
        return DefaultTextStyle(
          style: TextStyle(color: Colors.white),
          child: Container(
              //alignment: Alignment.center,
              height: 50.0,
              width: double.infinity,
              color: Colors.white,
              child: Row(
                children: <Widget>[
                  InkWell(
                    onTap: () {
                      Navigator.of(context).pop();
                    },
                    child: Container(
                        margin: EdgeInsets.only(left: 10),
                        child: Icon(
                          Icons.chevron_left,
                          color: Constants.BlackTextColor,
                        )),
                  ),
                  Expanded(
                      child: Container(
                          alignment: Alignment.center,
                          child: fixedText("${data.data + 1} / ${pics.length}",
                              color: Constants.BlackTextColor))),
                  isMyself
                      ? InkWell(
                          onTap: () {
                            CustomUI.buildOneConfirm(
                                context,
                                I18n.of(context).sure_delete,
                                I18n.of(context).determine, () {
                              callback(index);
                              Navigator.of(context).pop();
                            });
                          },
                          child: Container(
                              margin: EdgeInsets.only(right: 10),
                              child: Icon(
                                Icons.delete,
                                color: Constants.BlackTextColor,
                              )),
                        )
                      : Container(),
                ],
              )),
        );
      },
      initialData: index,
      stream: reBuild.stream,
    );
  }
}

class PicSwiperItem {
  var userId;
  int id;
  String picUrl;
  String des;
  File file;
  int type;
  bool isBuy; //是否购买
  bool isWatch; //是否观看
  PicSwiperItem(
    this.picUrl, {
    this.file,
    this.id,
    this.des = "",
    this.type = 0,
    this.isBuy = false,
    this.isWatch = false,
    this.userId,
  });
}