app/lib/paegs/mine_page/coupon_page/coupon_page.dart

import 'dart:convert';

import 'package:bbyyy/beans/my_coupon_bean_entity.dart';
import 'package:bbyyy/my_tools/event_bus.dart';
import 'package:bbyyy/my_tools/my_colors.dart';
import 'package:bbyyy/my_tools/my_views.dart';
import 'package:bbyyy/paegs/mine_page/coupon_page/coupon_view.dart';
import 'package:flutter/material.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';

import '../../../https/MyDio.dart';
import '../../../my_tools/dims.dart';
import '../../../my_tools/my_cookie.dart';
import '../../../my_tools/my_tools.dart';

class CouponPage extends StatefulWidget {
  @override
  _CouponPageState createState() => _CouponPageState();
}

class _CouponPageState extends State<CouponPage> {
  // int selectedIndex = 0;
  int page = 1;
  RefreshController controller = RefreshController(initialRefresh: true);
  List<MyCouponBeanDataData> coupons = [];

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    EventBus().on('showCouponIndex', (arg) {
      setState(() {});
    });
  }

  @override
  void dispose() {
    // TODO: implement dispose
    super.dispose();
    EventBus().off('showCouponIndex');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: MyColors.cF7F7F7,
      body: Column(
        children: [
          MyViews().myAppBar('优惠券', context, []),
          Expanded(
            child: SmartRefresher(
              controller: controller,
              onRefresh: onRefresh,
              onLoading: onLoading,
              enablePullUp: true,
              enablePullDown: true,
              child: coupons.length==0?SingleChildScrollView(child: noData()):ListView.builder(
                itemBuilder: (c, index) {
                  return CouponView().ticketItem(coupons[index]);
                },
                itemCount: coupons.length,
                padding:
                    EdgeInsets.only(top: 5, left: 24, right: 24, bottom: 20),
              ),
            ),
          ),
        ],
      ),
    );
  }

  void onRefresh() {
    page = 1;
    checkCoupons();
  }

  void onLoading() {
    page++;
    checkCoupons();
  }

  checkCoupons() {
    MyDio().query({
      "key": "coupon",
      "filters": {
        "conditions": ["user_uid==${MyCookie().getUID()}"]
      },
      "dims": couponDims,
      "paging": [page, 20]
    }, (response, hasError) {
      if (!hasError) {
        MyCouponBeanEntity entity = MyCouponBeanEntity.fromJson(json.decode(response.data.toString()));
        if (page == 1) {
          coupons.clear();
        }
        coupons.addAll(entity.data.data);
        setState(() {});
      }
      endRe(controller);
    }, (error) {
      endRe(controller);
    });
  }
}