Clean/lib/module/photo_preview/phtoto_selected_preview_view.dart

import 'package:clean/base/base_page.dart';
import 'package:clean/data/bean/photos_type.dart';
import 'package:clean/module/photo_preview/photo_selected_preview_controller.dart';
import 'package:clean/resource/assets.gen.dart';
import 'package:clean/router/app_pages.dart';
import 'package:flutter/Material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:get/get_core/src/get_main.dart';
import 'package:wechat_assets_picker/wechat_assets_picker.dart';
import 'package:get/get.dart';

class PhotoSelectedPreviewPage
    extends BasePage<PhotoSelectedPreviewController> {
  const PhotoSelectedPreviewPage({super.key});

  static void start(PhotosType photosType, Set<String> selectedIds) {
    Get.toNamed(RoutePath.photoSelectedPreview, arguments: {
      "photosType": photosType,
      "selectedIds": selectedIds,
    });
  }

  @override
  bool statusBarDarkFont() {
    return false;
  }

  @override
  bool immersive() {
    return true;
  }

  @override
  Widget buildBody(BuildContext context) {
    return Stack(children: [
      Container(
        child: SafeArea(
          child: Obx(() {
            if (controller.photoGroups.isEmpty ||
                controller.photoGroups[0].images.isEmpty) {
              return _noNoPicturesCard();
            }
            return Column(
              children: [
                _titleCard(),
                Flexible(
                  child: Obx(() {
                    return SizedBox(
                      child: GridView.builder(
                          padding: EdgeInsets.symmetric(horizontal: 16.w),
                          scrollDirection: Axis.vertical,
                          // 设置为垂直方向滚动
                          physics: BouncingScrollPhysics(),
                          gridDelegate:
                              SliverGridDelegateWithFixedCrossAxisCount(
                            crossAxisCount: 3, // 每行显示 2 个元素
                            mainAxisSpacing: 8.w, // 垂直间距
                            crossAxisSpacing: 8.h, // 水平间距
                          ),
                          itemCount: controller.photoGroups[0].images.length,
                          itemBuilder: _buildPhotoItem(
                              controller.photoGroups[0].images)),
                    );
                  }),
                ),
                Obx(() {
                  if (controller.selectedPhotosIds.isNotEmpty) {
                    return _bottomBarCard();
                  } else {
                    return SizedBox();
                  }
                }),
                SizedBox(height: 8.h),
              ],
            );
          }),
        ),
      ),
      IgnorePointer(
        child: Assets.images.bgHome.image(
          width: 360.w,
          height: 234.h,
        ),
      ),
    ]);
  }

  Widget _titleCard() {
    return Container(
      alignment: Alignment.centerLeft,
      padding: EdgeInsets.only(left: 16.w, top: 14.h, right: 16.w,bottom: 20.h),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Obx(() {
            return Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                GestureDetector(
                  onTap: () => Get.back(),
                  child: Assets.images.iconBackArrow.image(
                    width: 28.w,
                    height: 28.h,
                  ),
                ),
                // 如果photoGroup数据为空，不显示全选按钮
                controller.photoGroups.isEmpty ||
                        controller.photoGroups[0].images.isEmpty
                    ? Container()
                    : GestureDetector(
                        onTap: () => controller.toggleGroupSelection(
                            controller.photoGroups[0].images),
                        child: Obx(() => Text(
                              controller
                                      .getGroupByImages(
                                          controller.photoGroups[0].images)
                                      .isSelected
                                      .value
                                  ? 'Deselect All'
                                  : 'Select All',
                              style: TextStyle(
                                color: Colors.white.withValues(alpha: 0.7),
                                fontSize: 14.sp,
                                fontWeight: FontWeight.w400,
                              ),
                            )),
                      ),
              ],
            );
          }),
        ],
      ),
    );
  }

  Widget _bottomBarCard() {
    return GestureDetector(
        onTap: () {
          controller.clickDelete();
        },
        child: Container(
          width: 328.w,
          height: 48.h,
          decoration: ShapeDecoration(
            color: Color(0xFF0279FB),
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(10.r),
            ),
          ),
          padding: EdgeInsets.symmetric(horizontal: 16.w),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Assets.images.iconDelete.image(
                width: 18.w,
                height: 18.h,
              ),
              SizedBox(width: 5.w),
              Obx(() {
                return Text(
                  'delete ${controller.selectedFilesSize.value.toStringAsFixed(1)} KB',
                  textAlign: TextAlign.center,
                  style: TextStyle(
                    color: Colors.white,
                    fontSize: 16.sp,
                    fontWeight: FontWeight.w500,
                  ),
                );
              }),
            ],
          ),
        ));
  }

  Widget Function(BuildContext, int) _buildPhotoItem(
          List<AssetEntity> images) =>
      (context, index) {
        final group =
            controller.getGroupByImages(controller.photoGroups[0].images);

        return GestureDetector(
          onTap: () => controller.clickImage(images, index),
          child: Obx(() {
            var isSelected = group.selectedImages[index];
            return Stack(
              children: [
                Container(
                  width: 104.w,
                  height: 104.w,
                  decoration: ShapeDecoration(
                    color: Colors.white.withValues(alpha: 0.12),
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(9.27.sp),
                    ),
                    image: DecorationImage(
                      image: AssetEntityImageProvider(
                        group.images[index],
                        thumbnailSize: const ThumbnailSize.square(300),
                        isOriginal: false,
                      ),
                      fit: BoxFit.cover,
                    ),
                  ),
                ),
                Positioned(
                  right: 8.w,
                  bottom: 8.h,
                  child: GestureDetector(
                      onTap: () =>
                          controller.toggleImageSelection(images, index),
                      child: Container(
                        child: isSelected
                            ? Center(
                                child: Assets.images.iconSelected.image(
                                  width: 20.w,
                                  height: 20.h,
                                ),
                              )
                            : Center(
                                child: Assets.images.iconUnselected.image(
                                width: 20.w,
                                height: 20.h,
                              )),
                      )),
                ),
              ],
            );
          }),
        );
      };

  Widget _noNoPicturesCard() {
    return Column(
      mainAxisAlignment: MainAxisAlignment.start,
      children: [
        _titleCard(),
        SizedBox(height: 170.h),
        Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Container(
              width: 70.w,
              height: 70.h,
              clipBehavior: Clip.antiAlias,
              decoration: BoxDecoration(),
              child: Assets.images.iconNoPictures.image(),
            ),
            SizedBox(height: 22.h),
            Text(
              'No pictures found',
              textAlign: TextAlign.center,
              style: TextStyle(
                color: Colors.white,
                fontSize: 20.sp,
                fontWeight: FontWeight.w700,
              ),
            ),
            SizedBox(height: 12.h),
            Text(
              'No pictures available at the moment',
              textAlign: TextAlign.center,
              style: TextStyle(
                color: Colors.white.withValues(alpha: 0.6),
                fontSize: 14.sp,
                fontWeight: FontWeight.w400,
              ),
            ),
          ],
        ),
      ],
    );
  }
}