previousValues function

Implementation

double previousValues(
    {required List<ProgressModel> listProgress, required int index}) {
  double totalProgress = 0;

  if (index != 0) {
    if (index == 1) {
      totalProgress = listProgress[index - 1].progressValue;
    } else {
      for (int i = 0; i < index; i++) {
        totalProgress += listProgress[i].progressValue;
      }
    }
  }
  return totalProgress;
}