coupon_selecet_page.dart
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import 'package:flutter/material.dart';
import 'package:flutter_easyrefresh/easy_refresh.dart';
import 'package:flutter_screenutil/screenutil.dart';
import 'package:one_key/constant/state.dart';
import 'package:one_key/pages/coupon/coupon_item.dart';
import 'package:one_key/provider/coupon_provider.dart';
import 'package:one_key/utils/navigator_util.dart';
import 'package:one_key/widgets/h_empty_view.dart';
import 'package:one_key/widgets/page_exception.dart';
import 'package:one_key/widgets/round_button.dart';
import 'package:one_key/widgets/system_app_bar.dart';
import 'package:one_key/widgets/v_empty_view.dart';
import 'package:provider/provider.dart';
class CouponSelectPage extends StatefulWidget {
CouponSelectPage({Key key}) : super(key: key);
@override
_CouponSelectPageState createState() => _CouponSelectPageState();
}
class _CouponSelectPageState extends State<CouponSelectPage> {
EasyRefreshController _controller = EasyRefreshController();
CouponProvider couponProvider;
///获取优惠券列表数据
_couponNetworkData() {
return Future.delayed(Duration(seconds: 1),
() => couponProvider.pageStateSelect = PageState.Success);
}
@override
void initState() {
// TODO: implement initState
super.initState();
WidgetsBinding.instance.addPostFrameCallback((_) {
_couponNetworkData();
});
}
@override
Widget build(BuildContext context) {
couponProvider = Provider.of<CouponProvider>(context, listen: true);
return Scaffold(
appBar: SystemAppBar(
'优惠券',
onTap: () {
Navigator.pop(context);
},
rightImgName: couponProvider.checkValue ? '取消全选' : '全选',
onTapRight: () {
if (couponProvider.checkValue) {
couponProvider.cancelAll();
} else {
couponProvider.addAll();
}
},
),
body: Column(
children: [
Expanded(child: Consumer<CouponProvider>(
builder: (context, model, _) {
if (model.pageStateSelect != PageState.Success) {
return ExceptionPage(
pageState: model.pageStateSelect,
callback: () {
// offset = 0;
// getMessage(showLoading: true);
},
emptyMsg: "暂时没有列表信息哦",
emptyImg: "empty_search",
showMsg: "加载中，请稍后...",
);
} else {
return EasyRefresh.custom(
controller: _controller,
shrinkWrap: true,
slivers: [
SliverList(
delegate: SliverChildBuilderDelegate(
(BuildContext context, int index) {
return InkWell(
onTap: () {
couponProvider.listData[index]['checked'] =
!couponProvider.listData[index]['checked'];
if (couponProvider.listData[index]['checked']) {
couponProvider.addData(index);
} else {
couponProvider.cancelData(index);
}
couponProvider.getCheckValue();
},
child: Row(
children: [
HEmptyView(30),
Image.asset(
couponProvider.listData[index]['checked']
? 'assets/select.png'
: 'assets/unselect.png',
width: ScreenUtil().setWidth(44)),
Expanded(
child: CouponItem(
index: index,
couponProvider: couponProvider,
onPressed: () {
couponProvider.listData[index]['checked'] =
!couponProvider.listData[index]
['checked'];
if (couponProvider.listData[index]
['checked']) {
couponProvider.addData(index);
} else {
couponProvider.cancelData(index);
}
couponProvider.getCheckValue();
},
))
],
),
);
}, childCount: couponProvider.listData.length),
)
],
onRefresh: () async {
// offset = 0;
// getMessage(showLoading: false);
},
onLoad: () async {
// offset++;
// getMessage(showLoading: false);
},
);
}
},
)),
VEmptyView(20),
Padding(
padding: EdgeInsets.fromLTRB(ScreenUtil().setWidth(40), 0,
ScreenUtil().setWidth(40), ScreenUtil().setWidth(40)),
child: RoundButton(
onPressed: () {
Navigator.pop(context);
},
text: '已选${couponProvider.coupons.length}个 确定',
fontSize: 34,
isBold: false,
height: ScreenUtil().setWidth(80),
width: double.infinity,
radius: ScreenUtil().setWidth(10),
))
],
),
);
}
}