private async void RestoreSortIfNeed()
{
if (this.InvokeRequired)
{
this.BeginInvoke(_RestoreSortIfNeedAction);
return;
}
if (!_LastSortInfo.TryGetSorting(out var columnIndex, out var sortOrder))
{
DGV.ClearHeaderSortGlyphDirection();
return;
}
#region [.get comparison routine.]
var comparison = default(Comparison <DownloadRow>);
switch (columnIndex)
{
case OUTPUTFILENAME_COLUMN_INDEX:
comparison = (x, y) => string.Compare(x.OutputFileName, y.OutputFileName, true);
break;
case OUTPUTDIRECTORY_COLUMN_INDEX:
comparison = (x, y) => string.Compare(x.OutputDirectory, y.OutputDirectory, true);
break;
case STATUS_COLUMN_INDEX:
comparison = (x, y) => SortHelper.ToInt32(x.Status).CompareTo(SortHelper.ToInt32(y.Status));
break;
case DOWNLOAD_PROGRESS_COLUMN_INDEX:
comparison = (x, y) => x.SuccessDownloadParts.CompareTo(y.SuccessDownloadParts);
break;
case DOWNLOAD_BYTES_COLUMN_INDEX:
comparison = (x, y) => x.DownloadBytesLength.CompareTo(y.DownloadBytesLength);
break;
case APPROX_REMAINED_BYTES_COLUMN_INDEX:
comparison = (x, y) => x.GetApproxRemainedBytes().CompareTo(y.GetApproxRemainedBytes());
break;
case APPROX_TOTAL_BYTES_COLUMN_INDEX:
comparison = (x, y) => x.GetApproxTotalBytes().CompareTo(y.GetApproxTotalBytes());
break;
case URL_COLUMN_INDEX:
comparison = (x, y) => string.Compare(x.Url, y.Url, true);
break;
case DOWNLOAD_TIME_COLUMN_INDEX:
case APPROX_REMAINED_TIME_COLUMN_INDEX:
case DOWNLOAD_SPEED_COLUMN_INDEX:
//---comparison = (x, y) => x..CompareTo( y. );
return;
default:
DGV.ClearHeaderSortGlyphDirection();
throw (new NotImplementedException($"columnIndex: {columnIndex}"));
}
#endregion
var coeff = ((sortOrder == SortOrder.Ascending) ? 1 : -1);
var row = GetSelectedDownloadRow();
_Model.Sort(SortHelper.CreateComparison(comparison, coeff));
DGV.SetHeaderSortGlyphDirection(columnIndex, sortOrder);
await Task.Delay(1);
SelectDownloadRowInternal(row, true);
}
