huixiang_app/lib/home/huixiang_brand_page.dart

import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_html/flutter_html.dart';
import 'package:flutter_swiper_null_safety/flutter_swiper_null_safety.dart';
import 'package:huixiang/generated/l10n.dart';
import 'package:huixiang/main.dart';
import 'package:huixiang/retrofit/data/banner.dart';
import 'package:huixiang/retrofit/data/base_data.dart';
import 'package:huixiang/retrofit/data/brand_data.dart';
import 'package:huixiang/retrofit/retrofit_api.dart';
import 'package:huixiang/utils/event_type.dart';
import 'package:huixiang/view_widget/classic_header.dart';
import 'package:huixiang/view_widget/custom_image.dart';
import 'package:huixiang/view_widget/icon_text.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:huixiang/view_widget/loading_view.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:shared_preferences/shared_preferences.dart';

class BrandPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _BrandPage();
  }
}

class _BrandPage extends State<BrandPage>
    with SingleTickerProviderStateMixin, AutomaticKeepAliveClientMixin {
  ScrollController tabController;

  Map<String, String> images = {
    S.current.bainianchuanjiao: "assets/image/icon_chili.png",
    S.current.haixiajiemei: "assets/image/icon_milk_tea.png",
    S.current.qianjinmaiwei: "assets/image/icon_bread.png",
  };

  GlobalKey chiliGlobalKey = GlobalKey();
  GlobalKey milkTeaGlobalKey = GlobalKey();
  GlobalKey breadGlobalKey = GlobalKey();

  ApiService apiService;
  BrandData brandData;
  List<BannerData> bannerData = [];

  queryHome() async {
    showCupertinoDialog(
        context: context,
        barrierDismissible: true,
        builder: (context) {
          return LoadingView();
        });
    BaseData baseData = await apiService.queryHome().catchError((error) {
      refreshController.refreshFailed();
    });

    BaseData banner = await apiService.queryBanner({
      "model": {"type": "BRAND_APP"},
    }).catchError((error) {
      refreshController.refreshFailed();
    });
    bannerData.clear();
    bannerData.addAll((banner.data["records"] as List<dynamic>)
        .map((e) => BannerData.fromJson(e))
        .toList());

    if (Navigator.canPop(context)) Navigator.of(context).pop();

    if (baseData != null && baseData.isSuccess) {
      refreshController.refreshCompleted();
      brandData = BrandData.fromJson(baseData.data);
      setState(() {});
    } else {
      refreshController.refreshFailed();
    }
  }

  @override
  void initState() {
    super.initState();

    SharedPreferences.getInstance().then((value) => {
          apiService = ApiService(Dio(),
              context: context, token: value.getString('token')),
          queryHome(),
        });

    if (tabController == null) tabController = ScrollController();
    tabController.addListener(() {
      RenderBox chiliRenderBox =
          chiliGlobalKey.currentContext.findRenderObject();
      RenderBox milkTeaRenderBox =
          milkTeaGlobalKey.currentContext.findRenderObject();
      RenderBox breadRenderBox =
          breadGlobalKey.currentContext.findRenderObject();

      Offset chiliOffset = chiliRenderBox.localToGlobal(Offset.zero);
      Offset milkTeaOffset = milkTeaRenderBox.localToGlobal(Offset.zero);
      Offset breadOffset = breadRenderBox.localToGlobal(Offset.zero);

      var top = 96.h;
      if (chiliOffset.dy <= top) {
        if (!isVisible) {
          isVisible = true;
          setState(() {});
        }
      } else {
        var b = isVisible;
        isVisible = false;
        if (b) setState(() {});
        selectedIndex = "";
      }
      if (chiliOffset.dy <= top && breadOffset.dy > top) {
        selectedIndex =
            (brandData.contents as Map<String, dynamic>).keys.elementAt(0);
        if (selectedIndex1 != selectedIndex) {
          setState(() {
            print("object：$selectedIndex");
          });
          selectedIndex1 = selectedIndex;
        }
      } else if (breadOffset.dy <= top && milkTeaOffset.dy > top) {
        selectedIndex =
            (brandData.contents as Map<String, dynamic>).keys.elementAt(1);
        if (selectedIndex1 != selectedIndex) {
          setState(() {
            print("object：$selectedIndex");
          });
          selectedIndex1 = selectedIndex;
        }
      } else if (milkTeaOffset.dy <= top) {
        selectedIndex =
            (brandData.contents as Map<String, dynamic>).keys.elementAt(2);
        if (selectedIndex1 != selectedIndex) {
          setState(() {
            print("object：$selectedIndex");
          });
          selectedIndex1 = selectedIndex;
        }
      }
    });

    eventBus.on<EventType>().listen((event) {
      print("object: BrandPage");
      setState(() {});
    });
  }

  String selectedIndex = "";
  String selectedIndex1 = "";
  RefreshController refreshController = RefreshController();

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Scaffold(
      appBar: AppBar(
        toolbarHeight: 40 - MediaQuery.of(context).padding.top,
        backgroundColor: Colors.white,
        elevation: 0,
      ),
      body: Container(
        padding: EdgeInsets.only(bottom: 76.h),
        child: Stack(
          children: [
            Container(
              child: SmartRefresher(
                controller: refreshController,
                enablePullDown: true,
                enablePullUp: false,
                header: MyHeader(),
                physics: BouncingScrollPhysics(),
                onRefresh: queryHome,
                scrollController: tabController,
                child: Container(
                  child: SingleChildScrollView(
                    physics: NeverScrollableScrollPhysics(),
                    child: Container(
                      color: Color(0xFFF7F7F7),
                      margin: EdgeInsets.only(top: 16),
                      child: Column(
                        children: homeChildItem(),
                      ),
                    ),
                  ),
                ),
              ),
            ),
            Positioned(
              child: Visibility(
                visible: isVisible,
                child: Container(
                  width: MediaQuery.of(context).size.width,
                  child: Container(
                    height: 52.h,
                    color: Colors.white,
                    padding: EdgeInsets.all(6),
                    alignment: Alignment.center,
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.spaceAround,
                      crossAxisAlignment: CrossAxisAlignment.center,
                      children:
                          (brandData == null || brandData.contents == null)
                              ? []
                              : (brandData.contents as Map<String, dynamic>)
                                  .keys
                                  .map((e) => item(e, selectedIndex == e))
                                  .toList(),
                    ),
                  ),
                ),
              ),
              top: 0,
            ),
          ],
        ),
      ),
    );
  }

  List<Widget> homeChildItem() {
    var widgets = <Widget>[banner(), buildInfo(), buildTab()];
    if (brandData == null) return widgets;
    (brandData.contents as Map<String, dynamic>).forEach((key, value) {
      widgets.add(Container(
        key: key == "百年川椒"
            ? chiliGlobalKey
            : (key == "前进麦味" ? breadGlobalKey : milkTeaGlobalKey),
        child: Container(
          child: Html(
            data: value,
          ),
        ),
      ));
    });

    return widgets;
  }

  bool isVisible = false;

  Widget buildTab() {
    return Container(
      // key: tabGlobalKey,
      height: 52.h,
      padding: EdgeInsets.all(6),
      alignment: Alignment.center,
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceAround,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: (brandData == null || brandData.contents == null)
            ? []
            : (brandData.contents as Map<String, dynamic>)
                .keys
                .map((e) => item(e, false))
                .toList(),
      ),
    );
  }

  Widget item(text, isSelected) {
    return GestureDetector(
      onTap: () {
        FlexParentData parendData;
        if (text == S.of(context).bainianchuanjiao) {
          parendData =
              chiliGlobalKey.currentContext.findRenderObject().parentData;
        } else if (text == S.of(context).haixiajiemei) {
          parendData =
              milkTeaGlobalKey.currentContext.findRenderObject().parentData;
        } else if (text == S.of(context).qianjinmaiwei) {
          parendData =
              breadGlobalKey.currentContext.findRenderObject().parentData;
        }
        double offset = parendData.offset.dy - 52.h + 20;
        tabController.animateTo(offset,
            duration: Duration(seconds: 1), curve: Curves.ease);
      },
      child: tabItem(text, selectedIndex == text),
    );
  }

  Widget tabItem(text, isSelected) {
    if (isSelected) {
      return IconText(
        text,
        isMax: false,
        rightImage: images[text],
        iconSize: 16,
        iconColor: Colors.red,
        textStyle: TextStyle(
            fontWeight: FontWeight.bold,
            fontSize: 16,
            color: Color(0xFF353535)),
      );
    } else {
      return IconText(
        text,
        isMax: false,
        textStyle: TextStyle(
            fontWeight: FontWeight.bold,
            fontSize: 16,
            color: Color(0xFF353535)),
      );
    }
  }

  Widget buildInfo() {
    return Container(
      margin: EdgeInsets.only(bottom: 20, top: 16),
      padding: EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: Colors.white,
        boxShadow: [
          BoxShadow(
            color: Colors.black.withAlpha(12),
            offset: Offset(0, 2),
            blurRadius: 14,
            spreadRadius: 0,
          )
        ],
      ),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.start,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              ClipOval(
                child: MImage(
                  brandData == null ? "" : brandData.originAvatar,
                  fit: BoxFit.cover,
                  width: 60,
                  height: 60,
                  errorSrc: "assets/image/default_1.png",
                  fadeSrc: "assets/image/default_1.png",
                ),
                clipBehavior: Clip.hardEdge,
              ),
              SizedBox(
                width: 16,
              ),
              Expanded(
                child: Container(
                  height: 60,
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text.rich(
                        TextSpan(children: [
                          TextSpan(
                            text: brandData == null ? "" : brandData.originator,
                            style: TextStyle(
                              fontWeight: FontWeight.bold,
                              fontSize: 14,
                              color: Colors.black,
                            ),
                          ),
                          TextSpan(
                            text: " 集团创办人",
                            style: TextStyle(
                              fontSize: 10,
                              color: Colors.black,
                            ),
                          ),
                        ]),
                        textDirection: TextDirection.ltr,
                      ),
                      Text(
                        brandData == null ? "" : brandData.originDesc,
                        overflow: TextOverflow.ellipsis,
                        maxLines: 2,
                        style: TextStyle(
                          fontSize: 12.sp,
                          color: Color(0xFF353535),
                        ),
                      ),
                    ],
                  ),
                ),
                flex: 1,
              )
            ],
          ),
          SizedBox(
            height: 40,
          ),
          Text(
            brandData == null ? "" : brandData.company,
            style: TextStyle(
              fontSize: 16.sp,
              fontWeight: FontWeight.bold,
              color: Colors.black,
            ),
          ),
          SizedBox(
            height: 20,
          ),
          Text(
            brandData == null ? "" : brandData.companyDesc,
            textAlign: TextAlign.justify,
            style: TextStyle(
              fontSize: 12.sp,
              color: Color(0xFF353535),
            ),
          ),
          SizedBox(
            height: 40,
          ),
          Text(
            S.of(context).linian,
            style: TextStyle(
              fontSize: 16.sp,
              fontWeight: FontWeight.bold,
              color: Colors.black,
            ),
          ),
          SizedBox(
            height: 20,
          ),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: buildIdea(),
          ),
        ],
      ),
    );
  }

  List<Widget> buildIdea() {
    if (brandData == null) return [];
    var ideas = <Widget>[];
    (brandData.ideals as Map<String, dynamic>).forEach((key, value) {
      ideas.add(idea(key, value));
    });
    return ideas;
  }

  banner() {
    return Container(
      child: AspectRatio(
        aspectRatio: 2.08,
        child: Swiper(
            viewportFraction: 0.88,
            scale: 0.93,
            // loop: true,
            // autoplay: true,
            // duration: 2500,
            pagination: SwiperPagination(
              alignment: Alignment.bottomCenter,
              builder: DotSwiperPaginationBuilder(
                size: 8,
                activeSize: 8,
                space: 5,
                activeColor: Colors.black,
                color: Colors.black.withAlpha(76),
              ),
            ),
            physics: BouncingScrollPhysics(),
            itemBuilder: (context, position) {
              return MImage(
                (bannerData != null && position < bannerData.length)
                    ? bannerData[position].imgUrl
                    : "",
                fit: BoxFit.cover,
                radius: BorderRadius.circular(8),
                errorSrc: "assets/image/default_2_1.png",
                fadeSrc: "assets/image/default_2_1.png",
              );
            },
            itemCount: (bannerData != null && bannerData.length > 0)
                ? bannerData.length
                : 1),
      ),
    );
  }

  Widget idea(key, value) {
    return Stack(
      children: [
        MImage(
          value,
          width: 71,
          height: 71,
          fit: BoxFit.cover,
          errorSrc: "assets/image/default_1.png",
          fadeSrc: "assets/image/default_1.png",
        ),
        Positioned(
          bottom: 0,
          child: Container(
            width: 71,
            decoration: BoxDecoration(
              color: Colors.black.withAlpha(125),
              borderRadius: BorderRadius.only(
                bottomRight: Radius.circular(4),
                bottomLeft: Radius.circular(4),
              ),
            ),
            padding: EdgeInsets.symmetric(vertical: 2),
            alignment: Alignment.center,
            child: Text(
              key,
              style: TextStyle(
                color: Colors.white,
                fontSize: 12.sp,
              ),
            ),
          ),
        )
      ],
    );
  }

  @override
  bool get wantKeepAlive => true;
}