aku_new_community_manager/lib/ui/home/business/business_view.dart

// Flutter imports:
import 'package:flutter/material.dart';

// Package imports:
import 'package:flutter_easyrefresh/easy_refresh.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

// Project imports:
import 'package:aku_new_community_manager/models/manager/bussiness_and_fix/bussiness_and_fix_model.dart';
import 'package:aku_new_community_manager/models/todo_bussiness/todo_model.dart';
import 'package:aku_new_community_manager/models/todo_bussiness/todo_outdoor_model.dart';
import 'package:aku_new_community_manager/ui/home/business/bussiness_func.dart';
import 'package:aku_new_community_manager/ui/home/business/todo_outdoor_card.dart';
import 'package:aku_new_community_manager/ui/sub_pages/business_and_fix/business_fix_card.dart';

class BussinessView extends StatefulWidget {
  final int backlogStatus;
  BussinessView({Key? key, required this.backlogStatus}) : super(key: key);

  @override
  _BussinessViewState createState() => _BussinessViewState();
}

class _BussinessViewState extends State<BussinessView>
    with AutomaticKeepAliveClientMixin {
  List _modelList = [];
  late EasyRefreshController _refreshController;
  late ScrollController _scrollController;
  @override
  void initState() {
    super.initState();
    _refreshController = EasyRefreshController();
    _scrollController = ScrollController();
  }

  @override
  void dispose() {
    _refreshController.dispose();
    _scrollController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return EasyRefresh(
      scrollController: _scrollController,
      firstRefresh: true,
      controller: _refreshController,
      header: MaterialHeader(),
      onRefresh: () async {
        var dataList =
            await BussinessFunc.getBussinessModelList(widget.backlogStatus);
        _modelList = dataList.map((e) => ToDoModel.fromJson(e)).toList();
        setState(() {});
      },
      child: _modelList.isEmpty
          ? _emptyWidget()
          : ListView(
              padding: EdgeInsets.symmetric(horizontal: 10.w, vertical: 10.w),
              children: _modelList.map((e) => _buildCard(e)).toList(),
            ),
    );
  }

  Widget _buildCard(dynamic e) {
    if (e.dynamicModel.runtimeType == BussinessAndFixModel) {
      return BusinessFixCard(
        model: e.dynamicModel,
        callRefresh: () {
          _refreshController.callRefresh();
        },
      );
    } else if (e.dynamicModel.runtimeType == ToDoOutDoorModel) {
      return ToDoOutDoorCard(
        model: e.dynamicModel,
        callRefresh: () {
          _refreshController.callRefresh();
        },
      );
    } else {
      return Container();
    }
  }

  Widget _emptyWidget() {
    return SizedBox();
  }

  @override
  bool get wantKeepAlive => true;
}