createCallback method

void Function(int, int) createCallback(
  1. dynamic url,
  2. int partialFileLength
)

Implementation

void Function(int, int) createCallback(url, int partialFileLength) =>
    (int received, int total) {
      getDownload(url)?.progress.value =
          (received + partialFileLength) / (total + partialFileLength);

      if (total == -1) {}
    };