app/lib/paegs/root_page/root_page.dart

import 'dart:async';
import 'dart:convert';

import 'package:bbyyy/beans/coupon_bean_entity.dart';
import 'package:bbyyy/beans/user_bean_entity.dart';
import 'package:bbyyy/https/MyDio.dart';
import 'package:bbyyy/https/my_request.dart';
import 'package:bbyyy/my_tools/dims.dart';
import 'package:bbyyy/my_tools/easy_loading/easy_loading.dart';
import 'package:bbyyy/my_tools/event_bus.dart';
import 'package:bbyyy/my_tools/loacion_util.dart';
import 'package:bbyyy/my_tools/my_colors.dart';
import 'package:bbyyy/my_tools/my_cookie.dart';
import 'package:bbyyy/my_tools/my_datas.dart';
import 'package:bbyyy/my_tools/my_tools.dart';
import 'package:bbyyy/my_tools/pop_up_queue.dart';
import 'package:bbyyy/nsq/nsq.dart' as Nsq;
import 'package:bbyyy/paegs/gang_page/gang_page.dart';
import 'package:bbyyy/paegs/home_page/home_page.dart';
import 'package:bbyyy/paegs/mine_page/mine_page.dart';
import 'package:bbyyy/paegs/mine_page/order_page/order_page.dart';
import 'package:bbyyy/paegs/msg_page/msg_page.dart';
import 'package:bbyyy/paegs/root_page/root_page_view.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_svg/flutter_svg.dart';

class RootPage extends StatefulWidget {
  @override
  _RootPageState createState() => _RootPageState();
}

class _RootPageState extends State<RootPage> {
  PageController pageController = PageController(initialPage: 0);
  DateTime lastPopTime;
  double ppx;

  @override
  void initState() {
    super.initState();
    MyCookie().initP();
    LocationUtil().initLocation(context);
    LocationUtil().getLocation();
    Nsq.ConnectServer(
      Nsq.handlerMessage, // 接收消息处理逻辑
      // serverIp: '172.16.104.14',
      serverIp: MyCookie().server,
      // 服务端返回
      serverPort: 4150,
      // 服务端返回
      topic: '${MyCookie().getUID()}',
      // 主题订阅，服务端返回
      channel: '${MyCookie().getUID()}',
      // 服务端返回uid
      clientId: '客户uid',
      // 服务端返回uid
      hostname: '主机名', // 服务端返回
    );
    EventBus().emit('检查粘贴板');
    EventBus().on('ChangePage', (arg) {
      if (RootPageView().bNIndex == 3) {
        queryPersonalInformation();
      }
      pageController.jumpToPage(RootPageView().bNIndex);
      setState(() {});
    });
    EventBus().on('hasNoPay', (arg) {
      setState(() {});
    });
    EventBus().on('showRP', (arg) {
      signInRedEnvelope();
    });
    MyData().init(context);
    queryPersonalInformation();
    checkForUpdates(context);
    Future.delayed(Duration(seconds: 1), () {
      checkCouponEvent();
    });
  }

  @override
  void dispose() {
    // TODO: implement dispose
    EventBus().off('ChangePage');
    EventBus().off('hasNoPay');
    EventBus().off('showRP');
    LocationUtil().stopLocation();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    ppx = MediaQuery.of(context).size.width / 375;
    return WillPopScope(
      onWillPop: () async {
        if (lastPopTime == null ||
            DateTime.now().difference(lastPopTime) > Duration(seconds: 2)) {
          lastPopTime = DateTime.now();
          EasyLoading.showToast('再按一次退出');
        } else {
          lastPopTime = DateTime.now();
          await SystemChannels.platform.invokeMethod('SystemNavigator.pop');
        }
        return false;
      },
      child: Scaffold(
        resizeToAvoidBottomInset: false,
        backgroundColor: Colors.transparent,
        body: Stack(
          children: [
            Column(
              children: [
                Expanded(
                  child: PageView(
                    controller: pageController,
                    children: [HomePage(), GangPage(), MsgPage(), MinePage()],
                    physics: NeverScrollableScrollPhysics(),
                  ),
                ),
                RootPageView().bottomNavigationBar(),
              ],
            ),
            if (MyCookie().haveNoPay)
              Positioned(
                bottom: 60,
                right: 0,
                child: SafeArea(
                  top: false,
                  child: GestureDetector(
                    onTap: () {
                      MyTools().toPage(
                          context,
                          OrderPage(
                            index: 2,
                          ), (then) {
                        queryPersonalInformation();
                      });
                    },
                    behavior: HitTestBehavior.translucent,
                    child: Container(
                      height: 44,
                      width: 100,
                      padding: EdgeInsets.symmetric(horizontal: 10),
                      child: Row(
                        children: [
                          SvgPicture.asset(
                            'images/svg/订单.svg',
                            color: Colors.white,
                            height: 15,
                            width: 15,
                          ),
                          Text(
                            '未付订单',
                            style: TextStyle(color: Colors.white, fontSize: 14),
                          )
                        ],
                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      ),
                      decoration: BoxDecoration(
                        color: Colors.amber,
                        borderRadius: BorderRadius.only(
                          topLeft: Radius.circular(22),
                          bottomLeft: Radius.circular(22),
                        ),
                      ),
                    ),
                  ),
                ),
              ),
          ],
        ),
      ),
    );
  }

  void queryPersonalInformation() {
    MyDio().query({
      "key": "user",
      "filters": {
        "conditions": ["uid == ${MyCookie().getUID()}"]
      },
      "dims": userDims,
      "paging": [1, 20]
    }, (response, hasError) {
      if (!hasError) {
        UserBeanEntity entity =
            UserBeanEntity().fromJson(json.decode(response.data.toString()));
        MyCookie().userBean = entity.data.data[0];
        EventBus().emit('userChange');
      }
    }, (error) {});
  }

  //查询优惠券活动
  checkCouponEvent() {
    MyDio().query({
      "key": "coupon_distribute",
      "filters": {
        "conditions": ["valid==true"],
      },
      "dims": couponDistributeDims,
      "paging": [1, 100]
    }, (response, hasError) {
      if (!hasError) {
        CouponBeanEntity entity =
            CouponBeanEntity().fromJson(json.decode(response.data.toString()));
        PopUpQueue().coupon.addAll(entity.data.data);
      }
    }, (error) {});
  }

  int showWitch = 0;

  //登录红包
  signInRedEnvelope() {
    showDialog<void>(
      context: context,
      barrierDismissible: false,
      // false = user must tap button, true = tap outside dialog
      builder: (BuildContext dialogContext) {
        return StatefulBuilder(builder: (BuildContext context, void Function(void Function()) setState) {
          return Container(
            child: Column(
              children: [
                showRedEnvelope(setState),
                GestureDetector(
                  onTap: () {
                    showWitch = 0;
                    Navigator.pop(context);
                  },
                  child: Container(
                    margin: EdgeInsets.only(top: 24 * ppx),
                    child: Icon(
                      Icons.clear,
                      color: Colors.white,
                    ),
                    height: 28 * ppx,
                    width: 28 * ppx,
                    alignment: Alignment.center,
                    decoration: BoxDecoration(
                        color: MyColors.c25E7E7E7,
                        borderRadius: BorderRadius.circular(14 * ppx)),
                  ),
                )
              ],
              mainAxisAlignment: MainAxisAlignment.center,
            ),
            alignment: Alignment.center,
          );
        },);
      },
    );
  }

  Stack showRedEnvelope(void Function(void Function() p1) setState) {
    switch (showWitch) {
      case 0:
        return redEnvelopeP1(setState);
      case 1:
        return redEnvelopeP2(setState);
      case 2:
        return redEnvelopeP3(setState);
      default:
        return redEnvelopeP1(setState);
    }
  }

  Stack redEnvelopeP1(void Function(void Function() p1) setState) {
    return Stack(
      children: [
        Positioned(
          child: Container(
            height: 396 * ppx,
            width: double.infinity,
            decoration: BoxDecoration(
                borderRadius: BorderRadius.circular(16),
                color: MyColors.cF25D4B),
            margin: EdgeInsets.symmetric(horizontal: 45 * ppx),
            alignment: Alignment.bottomCenter,
            child: CustomPaint(
                painter: RedEnvelopePath(),
                size: Size(double.infinity - (90 * ppx), 120 * ppx)),
          ),
        ),
        Positioned(
          bottom: 40 * ppx,
          left: ((375 / 2 - 45) * ppx),
          child: GestureDetector(
            onTap: () {
              setState((){
                showWitch = 1;
              });
            },
            behavior: HitTestBehavior.translucent,
            child: Container(
              decoration: BoxDecoration(
                  color: MyColors.cF1D19B,
                  borderRadius: BorderRadius.circular(45 * ppx)),
              height: 90 * ppx,
              width: 90 * ppx,
              child: Text(
                '抢',
                style: TextStyle(
                    color: MyColors.c333333,
                    fontSize: 40 * ppx,
                    decoration: TextDecoration.none,
                    fontWeight: FontWeight.normal),
              ),
              alignment: Alignment.center,
            ),
          ),
        ),
        Positioned(
          child: Column(
            children: [
              SvgPicture.asset('images/svg/logo.svg'),
              Container(
                margin: EdgeInsets.only(top: 28 * ppx),
                child: Text(
                  '登陆红包',
                  style: TextStyle(
                      color: Colors.white,
                      fontSize: 32 * ppx,
                      fontWeight: FontWeight.normal,
                      decoration: TextDecoration.none),
                ),
              ),
              Container(
                margin: EdgeInsets.only(top: 4 * ppx),
                child: Text(
                  '每人仅限1份',
                  style: TextStyle(
                      color: MyColors.cF1D19B,
                      fontSize: 14 * ppx,
                      fontWeight: FontWeight.normal,
                      decoration: TextDecoration.none),
                ),
              )
            ],
          ),
          top: 37 * ppx,
        )
      ],
      alignment: Alignment.topCenter,
    );
  }

  Stack redEnvelopeP2(void Function(void Function() p1) setState) {
    return Stack(
      children: [
        Positioned(
          child: Container(
            height: 396 * ppx,
            width: double.infinity,
            decoration: BoxDecoration(
                borderRadius: BorderRadius.circular(16),
                color: MyColors.cF55544),
            margin: EdgeInsets.symmetric(horizontal: 45 * ppx),
            alignment: Alignment.bottomCenter,
          ),
        ),
        Positioned(
          child: Column(
            children: [
              SvgPicture.asset('images/svg/logo.svg'),
              Container(
                margin: EdgeInsets.only(top: 48 * ppx),
                child: Text(
                  '0.30元',
                  style: TextStyle(
                      color: MyColors.cF1D19B,
                      fontSize: 30 * ppx,
                      fontWeight: FontWeight.normal,
                      decoration: TextDecoration.none),
                ),
              ),
              Container(
                margin: EdgeInsets.only(top: 10 * ppx),
                child: RichText(
                  text: TextSpan(
                      text: '自动划入钱包，去',
                      style: TextStyle(
                          color: MyColors.c333333,
                          decoration: TextDecoration.none,
                          fontSize: 13 * ppx),
                      children: [
                        TextSpan(
                            text: '提现',
                            style: TextStyle(
                                color: MyColors.c44D7B6,
                                decoration: TextDecoration.underline,
                                fontSize: 13 * ppx),
                            recognizer: TapGestureRecognizer()
                              ..onTap = () {
                                setState((){
                                  showWitch = 2;
                                });
                              }),
                      ]),
                ),
              )
            ],
          ),
          top: 37 * ppx,
        ),
        Positioned(
          child: Column(
            children: [
              Text(
                '详细规则',
                style: TextStyle(
                    color: Colors.white,
                    fontSize: 12 * ppx,
                    fontWeight: FontWeight.normal,
                    decoration: TextDecoration.none),
              ),
              Container(
                margin: EdgeInsets.only(top: 4 * ppx),
                child: Text(
                  '每人每天限领一份，每天八点官方准时派发登陆活动，',
                  style: TextStyle(
                      color: Colors.white,
                      fontSize: 9 * ppx,
                      fontWeight: FontWeight.normal,
                      decoration: TextDecoration.none),
                ),
              ),
              Text(
                '每天10000元，最高可直接领取100元！！！',
                style: TextStyle(
                    color: Colors.white,
                    fontSize: 9 * ppx,
                    fontWeight: FontWeight.normal,
                    decoration: TextDecoration.none),
              ),
            ],
          ),
          bottom: 20 * ppx,
        )
      ],
      alignment: Alignment.topCenter,
    );
  }

  Stack redEnvelopeP3(void Function(void Function() p1) setState) {
    return Stack(
      children: [
        Positioned(
          child: Container(
            height: 396 * ppx,
            width: double.infinity,
            decoration: BoxDecoration(
                borderRadius: BorderRadius.circular(16),
                color: MyColors.cF55544),
            margin: EdgeInsets.symmetric(horizontal: 45 * ppx),
          ),
        ),
        Positioned(
          child: Column(
            children: [
              SvgPicture.asset('images/svg/logo.svg'),
              Container(
                margin: EdgeInsets.only(top: 64 * ppx),
                child: Text(
                  '呀！来晚了，明天我一定准时！',
                  style: TextStyle(
                      color: MyColors.cF1D19B,
                      fontSize: 15 * ppx,
                      fontWeight: FontWeight.normal,
                      decoration: TextDecoration.none),
                ),
              )
            ],
          ),
          top: 37 * ppx,
        ),
        Positioned(
          child: Column(
            children: [
              Text(
                '详细规则',
                style: TextStyle(
                    color: Colors.white,
                    fontSize: 12 * ppx,
                    fontWeight: FontWeight.normal,
                    decoration: TextDecoration.none),
              ),
              Container(
                margin: EdgeInsets.only(top: 4 * ppx),
                child: Text(
                  '每人每天限领一份，每天八点官方准时派发登陆活动，',
                  style: TextStyle(
                      color: Colors.white,
                      fontSize: 9 * ppx,
                      fontWeight: FontWeight.normal,
                      decoration: TextDecoration.none),
                ),
              ),
              Text(
                '每天10000元，最高可直接领取100元！！！',
                style: TextStyle(
                    color: Colors.white,
                    fontSize: 9 * ppx,
                    fontWeight: FontWeight.normal,
                    decoration: TextDecoration.none),
              ),
            ],
          ),
          bottom: 20 * ppx,
        )
      ],
      alignment: Alignment.topCenter,
    );
  }
}

class RedEnvelopePath extends CustomPainter {
  Paint _paint = Paint()
    ..color = MyColors.cF55544 //画笔颜色
    ..strokeCap = StrokeCap.round //画笔笔触类型
    ..isAntiAlias = true //是否启动抗锯齿
    ..strokeWidth = 15.0; //画笔的宽度
  @override
  void paint(Canvas canvas, Size size) {
    print(size);
    var path = Path()
      ..moveTo(0, 0)
      ..quadraticBezierTo(size.width / 2, 80, size.width, 0)
      ..lineTo(size.width, size.height - 16)
      ..quadraticBezierTo(size.width, size.height, size.width - 16, size.height)
      ..lineTo(16, size.height)
      ..quadraticBezierTo(0, size.height, 0, size.height - 16)
      ..close();
    canvas.drawPath(path, _paint);
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) {
    return null;
  }
}