/// <summary>
/// Determines if the item should be processed.
/// </summary>
/// <param name="argument">The event argument.</param>
/// <returns>true if the item should be processed; otherwise false.</returns>
private void CanContinueProcessing(object argument)
{
CanContinueProcessingEventArgs arg = argument as CanContinueProcessingEventArgs;
CacheRequest request = arg.Request;
bool canProcess = true;
// Is it in the edit cache?
if (canProcess && editCache.ContainsKey(request.Guid))
{
canProcess = false;
}
// Is it already cached?
if (canProcess && (request.RequestType == RequestType.Thumbnail))
{
thumbCache.TryGetValue(request.Guid, out CacheItem existing);
if (existing != null &&
existing.Size == request.Size &&
existing.UseEmbeddedThumbnails == request.UseEmbeddedThumbnails &&
existing.AutoRotate == request.AutoRotate &&
existing.UseWIC == request.UseWIC)
{
canProcess = false;
}
// Is it outside the visible area?
if (canProcess && (CacheMode == CacheMode.OnDemand) &&
mImageListView != null &&
!mImageListView.IsItemVisible(request.Guid))
{
canProcess = false;
}
}
else if (canProcess && (request.RequestType == RequestType.Gallery))
{
CacheItem existing = galleryItem;
if (existing != null && existing.Guid == request.Guid && existing.Size == request.Size && existing.UseEmbeddedThumbnails == request.UseEmbeddedThumbnails && existing.AutoRotate == request.AutoRotate && existing.UseWIC == request.UseWIC)
{
canProcess = false;
}
}
else if (canProcess && (request.RequestType == RequestType.Renderer))
{
CacheItem existing = rendererItem;
if (existing != null && existing.Guid == request.Guid && existing.Size == request.Size && existing.UseEmbeddedThumbnails == request.UseEmbeddedThumbnails && existing.AutoRotate == request.AutoRotate && existing.UseWIC == request.UseWIC)
{
canProcess = false;
}
}
arg.ContinueProcessing = canProcess;
}
/// <summary>
/// Handles the RunWorkerCompleted event of the queued background worker.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="Manina.Windows.Forms.QueuedWorkerCompletedEventArgs"/>
/// instance containing the event data.</param>
void bw_RunWorkerCompleted(object sender, QueuedWorkerCompletedEventArgs e)
{
CacheRequest request = e.UserState as CacheRequest;
// We are done processing
processing.Remove(request.Guid);
// Do not process the result if the cache operation
// was cancelled.
if (e.Cancelled)
{
return;
}
// Get result
Utility.Tuple <ColumnType, string, object>[] details = (Utility.Tuple <ColumnType, string, object>[])e.Result;
if (details != null && mImageListView != null)
{
mImageListView.UpdateItemDetailsInternal(request.Guid, details);
}
// Refresh the control lazily
if (mImageListView != null && mImageListView.IsItemVisible(request.Guid))
{
mImageListView.Refresh(false, true);
}
// Raise the CacheError event
if (e.Error != null && mImageListView != null)
{
mImageListView.OnCacheErrorInternal(request.Guid, e.Error, CacheThread.Details);
}
}
/// <summary>
/// Sets the sub item item text corresponding to the custom column with the given index.
/// </summary>
/// <param name="index">Index of the custom column.</param>
/// <param name="text">New sub item text</param>
public void SetSubItemText(int index, string text)
{
int i = 0;
Guid found = Guid.Empty;
foreach (Guid guid in subItems.Keys)
{
if (i == index)
{
found = guid;
break;
}
i++;
}
if (found != Guid.Empty)
{
subItems[found] = text;
if (mImageListView != null && mImageListView.IsItemVisible(mGuid))
{
mImageListView.Refresh();
}
}
else
{
throw new IndexOutOfRangeException();
}
}
