trackoffical_app/libs/track_common/lib/view/home/map/map_page.dart

import 'package:common_pub/model.dart';
import 'package:common_pub/model/position.dart' as m;
import 'package:common_pub/ui/app_net_image.dart';
import 'package:track_common/service/map_watch.dart';
import 'package:track_common/widget/prelude.dart';

import '../../../model/map_info.dart';
import '../../../utils.dart';
import '../../../widget.dart';

abstract class MapPageController extends GetxController {
  @override
  void onInit() {
    super.onInit();
    mapGetMore();
  }

  Future<List<MapInfo>> getMapList(int limit, int offset);
  void afterTopMap();

  int get selectedMapId {
    return Get.find<MapWatchService>().instance?.id ?? 0;
  }

  set selectedMap(MapInfo map);

  void onTapMap(MapInfo info) {
    selectedMap = info;
    Get.find<MapWatchService>().setMap(info).then((value) => afterTopMap());
  }

  Future<void> mapGetMore() async {
    if (isMapGetMoreLoading.value) {
      return;
    }
    isMapGetMoreLoading.value = true;
    await tryApi(() async {
      final r = await getMapList(20, mapList.length);
      mapList.addAll(r);
      return;
    }, onFinally: () {
      isMapGetMoreLoading.value = false;
    });

    mapListScrollController.addListener(() {
      if (mapListScrollController.position.pixels ==
          mapListScrollController.position.maxScrollExtent) {
        //达到最大滚动位置
        mapGetMore();
      }
    });
  }

  final mapList = <MapInfo>[].obs;
  final isMapGetMoreLoading = false.obs;
  final mapListScrollController = ScrollController();
  final Rx<m.Position?> position = Rx(null);
}

class MapPage extends GetView<MapPageController> {
  const MapPage({super.key});

  @override
  Widget build(BuildContext context) {
    return Container(
      width: double.infinity,
      height: double.infinity,
      margin: const EdgeInsets.all(20),
      padding: const EdgeInsets.fromLTRB(58, 28, 58, 28),
      decoration: BoxDecoration(
          color: Colors.white, borderRadius: BorderRadius.circular(16)),
      child: Column(
        children: [
          const Row(
            children: [
              TitlePoint(),
              Text(' 地图列表'),
            ],
          ),
          Expanded(
              child: Obx(() => GridView.builder(
                  itemCount: controller.mapList.length,
                  controller: controller.mapListScrollController,
                  scrollDirection: Axis.horizontal,
                  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: 1.3),
                  itemBuilder: (context, i) {
                    return Obx(() {
                      final data = controller.mapList[i];
                      final s = controller.selectedMapId == data.id;
                      return GalleryCardWidget(
                          data: data,
                          position: controller.position.value,
                          isSelected: s);
                    });
                  })))
        ],
      ),
    );
  }
}

class GalleryCardWidget extends GetView<MapPageController> {
  final MapInfo data;
  final m.Position? position;
  final bool isSelected;

  const GalleryCardWidget(
      {super.key,
      required this.data,
      required this.position,
      required this.isSelected});

  void onTap(MapInfo mapInfo) {
    controller.onTapMap(mapInfo);
  }

  @override
  Widget build(BuildContext context) {
    var distance = '--';
    if (data.distance != null) {
      distance = data.distance!.toString();
    }

    return GestureDetector(
      onTap: () => onTap(data),
      child: Card(
        color: Colors.white,
        shadowColor: isSelected ? Colors.red : null,
        surfaceTintColor: Colors.white,
        shape: const RoundedRectangleBorder(
            borderRadius: BorderRadius.all(Radius.circular(5.44))),
        clipBehavior: Clip.antiAlias,
        elevation: isSelected ? 8 : 4,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            AspectRatio(
                aspectRatio: 1.1,
                child:
                    AppNetImage(netImage: data.image, fit: BoxFit.fitHeight)),
            Expanded(
                child: Padding(
                    padding: const EdgeInsets.all(6),
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text(
                          data.name,
                          style: const TextStyle(
                            fontSize: 13.5,
                            fontWeight: FontWeight.w500,
                          ),
                          textAlign: TextAlign.start,
                          maxLines: 1,
                          overflow: TextOverflow.ellipsis,
                        ),
                        Text(
                          data.description,
                          style: const TextStyle(
                            fontSize: 10,
                            color: Color(0xffc6c6c6),
                          ),
                          textAlign: TextAlign.start,
                          maxLines: 1,
                          overflow: TextOverflow.ellipsis,
                        ),
                        const Spacer(),
                        DefaultTextStyle(
                            style: const TextStyle(
                                color: Colors.black, fontSize: 10),
                            child: Row(
                              crossAxisAlignment: CrossAxisAlignment.end,
                              mainAxisAlignment: MainAxisAlignment.spaceBetween,
                              children: [
                                Image.asset(Assets.imagesIcMapScale,
                                    package: package, height: 9.6),
                                Text(' 1:${data.mapScaleNumber}'),
                                const Spacer(),
                                Image.asset(Assets.imagesIcLocation,
                                    package: package, height: 9.6),
                                Text(' $distance'),
                              ],
                            ))
                      ],
                    ))),
          ],
        ),
      ),
    );
  }

  Widget wImage() {
    return Stack(
      children: [
        SizedBox(
            height: double.infinity,
            child: AppNetImage(netImage: data.image, fit: BoxFit.fitHeight)),
      ],
    );
  }
}