/// <summary>
/// This is an image that the user added dynamically.
/// TODO: We need to compress most images down to fairly small size in order to work..
/// </summary>
/// <param name="rtia"></param>
private void FilterRTImageAnnotation(RTImageAnnotation rtia)
{
Guid guid = rtia.Guid;
BufferChunk data;
lock (subQueue) {
//if annotation with this guid is found in low priority queue, replace it, otherwise enqueue it.
for (int i = 0; i < subQueue.Count; i++)
{
if ((((WorkItem)subQueue[i]).OpCode == PacketType.RTImageAnnotation) &&
(((WorkItem)subQueue[i]).Guid == guid))
{
subQueue.RemoveAt(i);
break;
}
}
}
rtia.Img = CompressImage(rtia.Img);
data = new BufferChunk(Helpers.ObjectToByteArray(rtia));
WorkItem wi = new WorkItem(data, PacketType.RTImageAnnotation, guid);
wi.DeckGuid = rtia.DeckGuid;
wi.SlideIndex = rtia.SlideIndex;
enqueueSub(wi);
}
/// <summary>
///
/// </summary>
/// <param name="ism"></param>
/// <returns></returns>
internal object AddImageAnnotation(UW.ClassroomPresenter.Network.Messages.Presentation.ImageSheetMessage ism)
{
if (ism.SheetCollectionSelector != UW.ClassroomPresenter.Network.Messages.Presentation.SheetMessage.SheetCollection.AnnotationSheets)
{
//We only support annotation sheets, not content sheets
return(null);
}
if ((ism.Parent == null) || !(ism.Parent is CP3Msgs.SlideInformationMessage))
{
warning += "Failed to locate slide for a image sheet. Ignoring Image Annotation. ";
return(null);
}
Guid slideId = (Guid)ism.Parent.TargetId;
TableOfContents.TocEntry tocEntry = toc.LookupBySlideId(slideId);
if (tocEntry == null)
{
warning += "Warning: Failed to find table of contents entry for a image annotation. Ignoring the annotation. ";
return(null);
}
//WebViewer wants things scaled to 500x500 (this was a CP2 convention).
Rectangle r = ((CP3Msgs.SheetMessage)ism).Bounds;
float fX = (float)r.X * 500F / getCurrentSlideWidth();
float fY = (float)r.Y * 500F / getCurrentSlideHeight();
Point scaledOrigin = new Point((int)Math.Round(fX), (int)Math.Round(fY));
int scaledWidth = r.Width * 500 / (int)getCurrentSlideWidth();
int scaledHeight = r.Height * 500 / (int)getCurrentSlideHeight();
RTImageAnnotation rtia = new RTImageAnnotation(scaledOrigin, (Guid)ism.TargetId, tocEntry.DeckId,
tocEntry.SlideIndex, scaledWidth, scaledHeight, ism.Img);
return(rtia);
}
/// <summary>
/// These are images that are added to slides "on-the-fly".
/// </summary>
/// <param name="rtia"></param>
private void ReceiveImageAnnotation(RTImageAnnotation rtia)
{
//Get the internal slide index:
int slideIndex = slideMap.GetMapping(rtia.SlideIndex, rtia.DeckGuid);
//Get the slide and overlay
Slide s = SlideDeck.GetSlide(slideIndex);
SlideOverlay so = SlideDeck.GetOverlay(slideIndex);
lock (so.DynamicImages) {
//If the annotation is already on the slide, replace, otherwise add.
if (so.DynamicImages.ContainsKey(rtia.Guid))
{
so.DynamicImages[rtia.Guid] = new DynamicImage(rtia.Guid, rtia.Origin, rtia.Width, rtia.Height, rtia.Img);
}
else
{
so.DynamicImages.Add(rtia.Guid, new DynamicImage(rtia.Guid, rtia.Origin, rtia.Width, rtia.Height, rtia.Img));
}
}
so.RefreshDynamicElements();
}
