/// <summary>
/// Delete a text or image annotation.
/// </summary>
/// <param name="rtda"></param>
private void ReceiveDeleteAnnotation(RTDeleteAnnotation rtda)
{
int slideIndex;
slideIndex = slideMap.GetMapping(rtda.SlideIndex, rtda.DeckGuid);
//Get the slide
Slide s = SlideDeck.GetSlide(slideIndex);
SlideOverlay so = SlideDeck.GetOverlay(slideIndex);
//If the annotation is on the slide, delete it.
lock (so.TextAnnotations) {
if (so.TextAnnotations.ContainsKey(rtda.Guid))
{
so.TextAnnotations.Remove(rtda.Guid);
}
}
lock (so.DynamicImages) {
if (so.DynamicImages.ContainsKey(rtda.Guid))
{
so.DynamicImages.Remove(rtda.Guid);
}
}
so.RefreshDynamicElements();
}
/// <summary>
/// This is used when deleting annotation sheets: text or image
/// </summary>
/// <param name="sheetRemovedMessage"></param>
/// <returns></returns>
internal object AddSheetRemoved(UW.ClassroomPresenter.Network.Messages.Presentation.SheetRemovedMessage srm)
{
if ((srm.Parent == null) || !(srm.Parent is CP3Msgs.SlideInformationMessage))
{
warning += "Failed to locate slide for a annotation sheet. Ignoring Text/image deletion ";
return(null);
}
Guid slideId = (Guid)srm.Parent.TargetId;
TableOfContents.TocEntry tocEntry = toc.LookupBySlideId(slideId);
if (tocEntry == null)
{
warning += "Warning: Failed to find table of contents entry for a text annotation. Ignoring the annotation. ";
return(null);
}
RTDeleteAnnotation rtdta = new RTDeleteAnnotation((Guid)srm.TargetId, tocEntry.DeckId, tocEntry.SlideIndex);
return(rtdta);
}
/// <summary>
/// This could be a delete for a text annotation or a dynamically added image (so called Image Annotation).
/// </summary>
/// <param name="rtda"></param>
private void FilterRTDeleteAnnotation(RTDeleteAnnotation rtda)
{
Guid guid = rtda.Guid;
lock (subQueue) {
//if annotation with this guid is found in low priority queue, remove it.
//We assume there will never be more than one due to the way we enqueue annotations.
for (int i = 0; i < subQueue.Count; i++)
{
if (((((WorkItem)subQueue[i]).OpCode == PacketType.RTTextAnnotation) ||
(((WorkItem)subQueue[i]).OpCode == PacketType.RTImageAnnotation)) &&
(((WorkItem)subQueue[i]).Guid == guid))
{
subQueue.RemoveAt(i);
break;
}
}
}
BufferChunk bc = new BufferChunk(Helpers.ObjectToByteArray(rtda));
enqueueMain(new WorkItem(bc, PacketType.RTDeleteTextAnnotation, rtda.SlideIndex, rtda.DeckGuid));
}
