private async void DeleteDeltaFiles(object arg)
{
_deletionBusy = true;
Progress <DeletionProgressReportModel> progress = new Progress <DeletionProgressReportModel>();
progress.ProgressChanged += ProgressReportedEventHandler;
MyDeletedFilesNo = 0;
MyDeletionProgress = 0;
string msg = "completed";
_cts = new CancellationTokenSource();
try
{
if (RSSettingsModel.Instance.DeletePromptSetting)
{
await DeleteDeltaFilesAsync(progress, _cts.Token);
}
else
{
await QuickDeleteDeltaFilesAsync(progress, _cts.Token);
}
}
catch (OperationCanceledException)
{
msg = "cancelled";
}
_cts.Dispose();
if (RSSettingsModel.Instance.DeletePromptSetting == false)
{
// We are using quick parallel delete method (which may have been cancelled) - remove actually deleted items 'manually', when the above loop finishes
foreach (var fd in SessionDeletedFiles)
{
MyDeltaFiles.Remove(fd);
QualifiedRawNo--;
}
MyDeltaFilesView.Refresh();
SessionDeletedFiles.Clear();
OnPropertyRaised("MyDeltaFilesNo");
OnPropertyRaised("MyRejectionRatio");
}
// We have done what we could, now
// Fire the FilesDeleted Event so that the Main Window can update its raw list view, and
// if the confirmation option is set, inform the user about the outcome of deletion.
FilesDeletedEvent();
if (RSSettingsModel.Instance.DeletePromptSetting)
{
WWMessageBox.Show($"Deletion { msg }.\nDeleted { MyDeletedFilesNo } file(s).", "Information", CustomMessageBoxButton.OK, MessageBoxImage.Information);
}
_deletionBusy = false;
return;
}
private void RemoveDeleteListItem(object arg)
{
// Last chance to avoid deleting a file from MyDeltaFiles - remove it from the list.
if (arg != null && (int)arg > -1)
{
FileDescriptorModel fdv = (FileDescriptorModel)MyDeltaFilesView.CurrentItem;
if (fdv != null)
{
// Remove only from Delta list, leave the rest of collections/lists alone...
MyDeltaFiles.Remove(fdv);
MyDeltaFilesView.MoveCurrentTo(null);
OnPropertyRaised("MyDeltaFilesNo");
OnPropertyRaised("MyRejectionRatio");
}
}
}
private void ProgressReportedEventHandler(object sender, DeletionProgressReportModel e)
{
MyDeletedFilesNo = e.DeletedFilesNo;
MyDeletionProgress = e.DeletionProgress;
OnPropertyRaised("MyDeletionProgress");
if (e.CurrentFd != null)
{
// Do this only when deletion is a single-threaded sequential operation (non-parallel)
if (MyDeltaFiles.Contains(e.CurrentFd))
{
MyDeltaFiles.Remove(e.CurrentFd);
MyDeltaFilesView.Refresh();
QualifiedRawNo--;
OnPropertyRaised("MyDeltaFilesNo");
OnPropertyRaised("MyRejectionRatio");
}
}
}