Clean/lib/module/people_photo/photo_group.dart

import 'package:get/get.dart';
class PhotoGroup {
  final String title;
  final int imageCount;
  final RxBool isSelected;
  final List<String> images;
  final RxList<bool> selectedImages;

  int get selectedCount => selectedImages.where((selected) => selected).length;

  PhotoGroup({
    required this.title,
    required this.imageCount,
    required bool isSelected,
    required this.images,
  })  : isSelected = isSelected.obs,
        selectedImages = List.generate(imageCount, (_) => isSelected).obs;

  void toggleSelectAll(bool value) {
    isSelected.value = value;
    selectedImages.assignAll(List.generate(images.length, (_) => value));
  }
}