trackoffical_app/lib/view/home/home_gallery_view.dart

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:trackoffical_app/generated/assets.dart';
import 'package:trackoffical_app/logger.dart';
import 'package:trackoffical_app/model/m_position.dart';
import 'package:trackoffical_app/model/m_net_image.dart';
import 'package:trackoffical_app/view/home/home_controller.dart';
import 'package:trackoffical_app/pb.dart' as pb;
import 'package:trackoffical_app/widget/hard_level.dart';
import '../../widget/app_net_image.dart';

class HomeGalleryView extends GetView<HomeController> {
  const HomeGalleryView({super.key});

  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
      initialIndex: 0,
      length: 3,
      child: Scaffold(
        appBar: _AppBar(),
        body: Padding(
            padding: const EdgeInsets.all(12),
            child: TabBarView(
              children: [ _TabRecommend(), _TabNearBy(), _TabMy()],
            )),
      ),
    );
  }
}

class _AppBar extends GetView<HomeController> implements PreferredSizeWidget {
  @override
  Widget build(BuildContext context) {
    var theme = Theme.of(context);
    theme = theme.copyWith(
        colorScheme: theme.colorScheme.copyWith(
      surfaceVariant: Colors.transparent,
    ));

    return Container(
      decoration: BoxDecoration(
        gradient: LinearGradient(colors: [
          context.theme.colorScheme.secondary,
          context.theme.colorScheme.onSecondaryContainer,
        ]),
        boxShadow: [
          BoxShadow(
            color: Colors.grey.withOpacity(0.5),
            spreadRadius: 3,
            blurRadius: 5,
            offset: const Offset(0, 2), // changes position of shadow
          ),
        ],
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          SizedBox(
            height: MediaQuery.of(context).padding.top,
          ),
          const Spacer(),
          SizedBox(
              width: 240,
              height: 40,
              child: Theme(
                  data: theme,
                  child: TabBar(
                    tabs: const [
                      Tab(text: '推荐'),
                      Tab(text: '附近'),
                      Tab(text: '我的'),
                    ],
                    onTap: (i) {
                      controller.flushGalleryData();
                    },
                    labelColor: Colors.white,
                    unselectedLabelColor: Colors.white,
                    labelStyle: const TextStyle(
                        fontSize: 20, fontWeight: FontWeight.w700),
                    unselectedLabelStyle: const TextStyle(fontSize: 14),
                    indicatorColor: Colors.white,
                  ))),
        ],
      ),
    );
  }

  @override
  Size get preferredSize => const Size.fromHeight(kToolbarHeight);
}

class _TabMy extends GetView<HomeController> {
  @override
  Widget build(BuildContext context) {
    return Obx(() {
      final data = controller.galleryData.value.myActivityList;

      return _dataView(context, data);
    });
  }
}

class _LocationBar extends GetView<HomeController> {
  @override
  Widget build(BuildContext context) {
    return Padding(
        padding: const EdgeInsets.all(12),
        child: Obx(
            () => Row(crossAxisAlignment: CrossAxisAlignment.center, children: [
                  GestureDetector(
                    onTap: controller.onClickSelectRegion,
                    child: Row(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        Text(
                          controller.regionName ?? '请选择城市',
                          style: const TextStyle(fontSize: 18),
                        ),
                        const Icon(Icons.arrow_drop_down)
                      ],
                    ),
                  ),
                  const Spacer(),
                  _RelocationButton()
                ])));
  }
}

class _RelocationButton extends GetView<HomeController> {
  @override
  Widget build(BuildContext context) {
    return Obx(() {
      return SizedBox(
          width: 80,
          child: TextButton(
            onPressed: () => controller.reLocate(),
            child: Column(
              mainAxisSize: MainAxisSize.min,
              children: [
                controller.isLocating.value
                    ? Container(
                        height: 18,
                        width: 18,
                        margin: const EdgeInsets.only(bottom: 2),
                        child: CircularProgressIndicator(
                            color: context.theme.colorScheme.primary))
                    : Image.asset('assets/images/ic_re_location.png',
                        height: 20, color: context.theme.colorScheme.primary),
                Text(controller.isLocating.value ? '定位中' : '重新定位',
                    style: TextStyle(
                        color: context.theme.colorScheme.primary, fontSize: 13))
              ],
            ),
          ));
    });
  }
}

class _TabNearBy extends GetView<HomeController> {
  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        _LocationBar(),
        Flexible(child: Obx(() {
          final data = controller.galleryData.value.nearbyActivityList;
          return _dataView(context, data);
        }))
      ],
    );
  }
}

class _TabRecommend extends GetView<HomeController> {
  @override
  Widget build(BuildContext context) {
    return Obx(() {
      final data = controller.galleryData.value.recommendActivityList;
      return _dataView(context, data);
    });
  }
}

Widget _dataView(BuildContext context, List<pb.ActivitySimpleInfo> data){
  return GridView.builder(
    itemCount: data.length,
      gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
        //设置列数
        crossAxisCount: 2,
        //设置横向间距
        crossAxisSpacing: 10,
        //设置主轴间距
        mainAxisSpacing: 10,
        childAspectRatio: 0.66
      ),

      itemBuilder: (context,i){
        return GalleryCardWidget(data: data[i]) ;
      });
}


class GalleryCardWidget extends GetView<HomeController> {
  final pb.ActivitySimpleInfo data;
  const GalleryCardWidget({super.key, required this.data});

  @override
  Widget build(BuildContext context) {

    return GestureDetector(
      onTap: data.isOpen? () => controller.onClickActivity(data): null,
      child: Card(
        color: const Color(0xfff2faff),
        surfaceTintColor: const Color(0xfff2faff),
        shape: const RoundedRectangleBorder(
            borderRadius: BorderRadius.all(Radius.circular(5.44))),
        clipBehavior: Clip.antiAlias,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            AspectRatio(
              aspectRatio: 1,
              child: wImage()
            ),
            Expanded(child: Padding(
                padding: const EdgeInsets.all(6),
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      data.name,
                      style: const TextStyle(
                        fontSize: 15.24,
                        fontWeight: FontWeight.w500,
                      ),
                      textAlign: TextAlign.start,
                      maxLines: 1,
                      overflow: TextOverflow.ellipsis,
                    ),
                    Row(
                      crossAxisAlignment: CrossAxisAlignment.center,
                      children: [
                        // Image.asset(Assets.imagesIcDistanceStraight, height: 10),
                        const Icon(Icons.location_on, size: 15, color: Colors.grey,),
                        const SizedBox(width: 6),
                        getDistanceText(data),
                        const SizedBox(width: 17),
                        Image.asset(Assets.imagesIcCp, height: 15),
                        const SizedBox(width: 4),
                        Text('${data.totalControlNum}'),
                      ],
                    ),
                    HardLevel(data.difficulty),
                  ],
                )))
            ,
          ],
        ),
      ),
    );
  }

  Widget wImage(){
    return Stack(
      children: [
        SizedBox(height: double.infinity,child: AppNetImage(
            netImage: data.actImage.toModel(), fit: BoxFit.fitHeight)),
        data.isOpen? const SizedBox():
        Container(
          width: double.infinity,
          height: double.infinity,
          color: Colors.white.withAlpha(178),
          alignment: Alignment.center,
          child: const Text('待开放', style: TextStyle(color: Color(0xffff6203), fontSize: 15.24),),
        )
      ],
    );
  }



  Widget getDistanceText(pb.ActivitySimpleInfo data){
    return Obx((){

      final myPosition = controller.myPosition;
      var str = '';
      if(myPosition != null){
        final p = data.position.toModel();
        str = p.distance(myPosition).toString();
      }

      return Text(str, style: const TextStyle(color: Colors.grey));
    });
  }

}