topic_picture_page.dart
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import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:wow_english/common/extension/string_extension.dart';
import 'package:wow_english/practice/chosetopic/topicpicture/bloc/topic_picture_bloc.dart';
import '../../widgets/practice_header_widget.dart';
class TopicPicturePage extends StatelessWidget {
const TopicPicturePage({super.key});
@override
Widget build(BuildContext context) {
return BlocProvider(
create: (context) => TopicPictureBloc(PageController(),3),
child: _TopicPicturePage(),
);
}
}
class _TopicPicturePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return BlocListener<TopicPictureBloc,TopicPictureState>(
listener: (context, state){},
child: _topicPictureView(),
);
}
Widget _topicPictureView() => BlocBuilder<TopicPictureBloc,TopicPictureState>(
buildWhen: (_,s) => s is CurrentPageIndexState,
builder: (context,state){
final bloc = BlocProvider.of<TopicPictureBloc>(context);
return Container(
color: Colors.white,
child: Stack(
children: [
Column(
children: [
PracticeHeaderWidget(
title: '${bloc.currentPage}/8',
onTap: (){Navigator.pop(context);},
),
Expanded(
child: PageView.builder(
itemCount: 8,
scrollDirection: Axis.horizontal,
controller: bloc.pageController,
onPageChanged: (int index) {
bloc.add(CurrentPageIndexChangeEvent(index));
},
itemBuilder: (BuildContext context,int index){
return _pageViewItemWidget();
}),
)
],
),
Positioned(
left: 0,
right: 0,
bottom: 0,
child: Image.asset('bottom_grass'.assetPng)
)
],
),
);
});
Widget _pageViewItemWidget() => BlocBuilder<TopicPictureBloc,TopicPictureState>(
builder: (context, state){
final bloc = BlocProvider.of<TopicPictureBloc>(context);
return SafeArea(
child: Column(
children: [
Text(
'What to do when the sentence question is very long and needs a line break',
softWrap: true,
style: TextStyle(
fontSize: 21.sp,
color: const Color(0xFF333333)
)
),
26.verticalSpace,
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Offstage(
offstage: (bloc.modelCount < 1),
child: _decodeImageWidget(1),
),
Offstage(
offstage: (bloc.modelCount < 2),
child: _decodeImageWidget(2),
),
Offstage(
offstage: (bloc.modelCount < 3),
child: _decodeImageWidget(3),
),
Offstage(
offstage: (bloc.modelCount < 4),
child: _decodeImageWidget(4),
)
],
)
],
),
);
});
Widget _decodeImageWidget(int index) => BlocBuilder<TopicPictureBloc,TopicPictureState>(
buildWhen: (_, s) => s is SelectItemChangeState,
builder: (context,state){
final bloc = BlocProvider.of<TopicPictureBloc>(context);
return GestureDetector(
onTap: () => bloc.add(SelectItemEvent(index)),
child: Container(
padding: const EdgeInsets.all(4.5),
decoration: BoxDecoration(
color: bloc.selectItem == index?const Color(0xFF00B6F1):Colors.white,
borderRadius: BorderRadius.circular(15),
),
height: 143.h,
width: 143.w,
child: Container(
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(15),
border: Border.all(
width: 1.0,
color: const Color(0xFF140C10)
),
image: const DecorationImage(
fit: BoxFit.fitWidth,
image: NetworkImage('https://img1.baidu.com/it/u=3392591833,1640391553&fm=253&fmt=auto&app=138&f=JPEG?w=500&h=714')
)
),
),
),
);
});
}