liangchengyou / wow_english

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lib/practice/chosetopic/topicpicture/topic_picture_page.dart 4.84 KB
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7652f701   liangchengyou   feat:课程购买UI逻辑 
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  import 'package:flutter/material.dart';
624214d0   liangchengyou   feat:看题选字/选图UI和部分逻辑 
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  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';
7652f701   liangchengyou   feat:课程购买UI逻辑 
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  class TopicPicturePage extends StatelessWidget {
    const TopicPicturePage({super.key});
  
    @override
    Widget build(BuildContext context) {
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      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(),
      );
7652f701   liangchengyou   feat:课程购买UI逻辑 
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    }
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    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')
                    )
                ),
              ),
            ),
          );
        });
7652f701   liangchengyou   feat:课程购买UI逻辑 
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  }