video_zone_page.dart
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import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:wow_english/common/dialogs/show_dialog.dart';
import 'package:wow_english/common/request/dao/video_dao.dart';
import 'package:wow_english/common/widgets/we_app_bar.dart';
import 'package:wow_english/route/route.dart';
import 'video_zone_item.dart';
class VideoZonePage extends StatefulWidget {
const VideoZonePage({super.key});
@override
State<VideoZonePage> createState() => _VideoZonePageState();
}
class _VideoZonePageState extends State<VideoZonePage> {
late Future<List<VideoZoneItem>> _itemsFuture;
@override
void initState() {
super.initState();
_itemsFuture = VideoDao.list();
}
void _reload() {
setState(() => _itemsFuture = VideoDao.list());
}
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.white,
appBar: const WEAppBar(
titleText: '视频专区',
centerTitle: false,
),
body: FutureBuilder<List<VideoZoneItem>>(
future: _itemsFuture,
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.waiting) {
return const Center(child: CircularProgressIndicator());
}
if (snapshot.hasError) {
return _VideoLoadError(onRetry: _reload);
}
final items = snapshot.data ?? const <VideoZoneItem>[];
if (items.isEmpty) {
return const Center(
child: Text(
'暂无视频',
style: TextStyle(color: Color(0xFF999999), fontSize: 18),
),
);
}
return RefreshIndicator(
onRefresh: () async {
final future = VideoDao.list();
setState(() => _itemsFuture = future);
await future;
},
child: GridView.builder(
physics: const AlwaysScrollableScrollPhysics(),
padding: EdgeInsets.fromLTRB(14.w, 10.h, 14.w, 16.h),
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 4,
mainAxisSpacing: 14.h,
crossAxisSpacing: 12.w,
childAspectRatio: 1.55,
),
itemCount: items.length,
itemBuilder: (context, index) => _VideoCard(
item: items[index],
onTap: () => _openVideo(items, index),
),
),
);
},
),
);
}
void _openVideo(List<VideoZoneItem> items, int index) {
final item = items[index];
if (!item.accessible || item.videoUrl.isEmpty) {
showTwoActionDialog('提示', '取消', '去购买', '购买课程后即可观看视频。', leftTap: popPage,
rightTap: () {
popPage();
pushNamed(AppRouteName.shop);
});
return;
}
Navigator.of(context).pushNamed(
AppRouteName.videoZonePlayer,
arguments: {
'items': items
.where((video) => video.accessible && video.videoUrl.isNotEmpty)
.toList(),
'initialVideoId': item.id,
},
).then((_) => _reload());
}
}
class _VideoLoadError extends StatelessWidget {
const _VideoLoadError({required this.onRetry});
final VoidCallback onRetry;
@override
Widget build(BuildContext context) {
return Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
const Text(
'视频加载失败，请稍后重试',
style: TextStyle(color: Color(0xFF999999), fontSize: 18),
),
const SizedBox(height: 12),
FilledButton(onPressed: onRetry, child: const Text('重新加载')),
],
),
);
}
}
class _VideoCard extends StatelessWidget {
const _VideoCard({required this.item, required this.onTap});
final VideoZoneItem item;
final VoidCallback onTap;
@override
Widget build(BuildContext context) {
return InkWell(
borderRadius: BorderRadius.circular(8.r),
onTap: onTap,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Expanded(
child: ClipRRect(
borderRadius: BorderRadius.circular(8.r),
child: Stack(
fit: StackFit.expand,
children: [
CachedNetworkImage(
imageUrl: item.coverUrl,
fit: BoxFit.cover,
placeholder: (_, __) => const ColoredBox(
color: Color(0xFFF2F2F2),
child: Center(child: CircularProgressIndicator()),
),
errorWidget: (_, __, ___) => const ColoredBox(
color: Color(0xFFF2F2F2),
child: Icon(Icons.broken_image_outlined,
color: Color(0xFFAAAAAA)),
),
),
const Center(
child: Icon(Icons.play_circle_fill,
size: 42, color: Colors.white),
),
],
),
),
),
SizedBox(height: 5.h),
Text(
item.title,
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: TextStyle(
color: const Color(0xFF222222),
fontFamily: null,
fontSize: 17.sp,
fontWeight: FontWeight.w500,
),
),
],
),
);
}
}