insertFiles method

void insertFiles(List<FormeFile> files)

Implementation

void insertFiles(List<FormeFile> files) {
  if (!mounted || files.isEmpty) {
    return;
  }

  final List<FormeFile> currentValue =
      (_gridController.currentItems ?? _gridController.value)
          .where((element) => element.value != null)
          .map((e) => e.value!)
          .toList();
  final int num = currentValue.length;
  final int? canInsertNums =
      widget.maximum == null ? null : widget.maximum! - num;
  if (canInsertNums != null && canInsertNums <= 0) {
    return;
  }

  List<FormeFile> needInserts =
      files.where((element) => !currentValue.contains(element)).toList();
  if (needInserts.isEmpty) {
    return;
  }

  if (canInsertNums != null && canInsertNums < needInserts.length) {
    needInserts = needInserts.sublist(0, canInsertNums);
  }

  final List<FormeFile> list = [];
  for (final FormeFile item in needInserts) {
    if (!list.contains(item)) {
      list.add(item);
    }
  }
  _gridController.value = _convert(currentValue..addAll(list));
}