private void ProcessCP3Message(CP3.Network.Messages.Message m)
{
if (m is CP3.Network.Messages.Presentation.DeckInformationMessage)
{
CP3.Network.Messages.Presentation.DeckInformationMessage dim = (CP3.Network.Messages.Presentation.DeckInformationMessage)m;
if ((dim.Disposition == UW.ClassroomPresenter.Model.Presentation.DeckDisposition.Whiteboard) ||
(dim.Disposition == UW.ClassroomPresenter.Model.Presentation.DeckDisposition.StudentSubmission) ||
(dim.Disposition == UW.ClassroomPresenter.Model.Presentation.DeckDisposition.QuickPoll))
{
return;
}
if (!decks.ContainsKey(dim.TargetId))
{
Deck thisDeck = new Deck(dim);
decks.Add(dim.TargetId, thisDeck);
if (this.OnDeckFound != null)
{
OnDeckFound(thisDeck);
}
}
}
else if (m is CP3.Network.Messages.Network.InstructorCurrentDeckTraversalChangedMessage)
{
CP3.Network.Messages.Network.InstructorCurrentDeckTraversalChangedMessage im = (CP3.Network.Messages.Network.InstructorCurrentDeckTraversalChangedMessage)m;
if (((im.Dispositon & UW.ClassroomPresenter.Model.Presentation.DeckDisposition.Whiteboard) == 0) &&
(!this.unnamedDecks.ContainsKey(im.DeckId)))
{
// This case captures all the decks, including cases where the deck is opened before
// the start of archiving, and there are no slide transitions within the deck, but
// one slide is shown. These need to be manually matched since we don't know the deck name.
// At the end of processing we merge these into the main decks collection.
this.unnamedDecks.Add(im.DeckId, new Deck(im.DeckId));
}
}
}
/// <summary>
/// This is a message used in the beacon, and it is also the message that indicates when
/// an instructor navigates to an initial slide in a newly opened deck.
/// </summary>
/// <param name="icdtcm"></param>
/// <returns></returns>
/// This is the beacon message graph we expect:
/// {InstructorMessage;
/// child={InstructorCurrentDeckTraversalChangedMessage;
/// pred={SlideInformationMessage;
/// pred={InstructorCurrentPresentationChangedMessage;};
/// child={TableOfContentsEntryMessage;};};};}
internal List <object> AddInstructorCurrentDeckTraversalChanged(UW.ClassroomPresenter.Network.Messages.Network.InstructorCurrentDeckTraversalChangedMessage icdtcm)
{
//If m.Predecessor.Child is a TOC entry, return a RTUPdate.
List <object> outputMessages = null;
if ((icdtcm.Predecessor != null) && (icdtcm.Predecessor.Child != null) &&
(icdtcm.Predecessor is CP3Msgs.SlideInformationMessage) &&
(icdtcm.Predecessor.Child is CP3Msgs.TableOfContentsEntryMessage))
{
if (icdtcm.Predecessor.Predecessor == null) //This effectively filters out the beacon messages.
//In some late-joiner scenarios, we may not have the TOC entry.
{
if (!toc.ContainsEntry((Guid)icdtcm.Predecessor.Child.TargetId))
{
string err;
Guid slideId = toc.AddTableOfContentsEntry((CP3Msgs.TableOfContentsEntryMessage)icdtcm.Predecessor.Child,
icdtcm.DeckId, icdtcm.Dispositon, out err);
if (err != null)
{
Debug.WriteLine(err);
}
else if (!slideId.Equals(Guid.Empty))
{
outputMessages = this.getCachedStrokes(slideId);
}
}
if (currentDeckId.Equals(icdtcm.DeckId) && currentSlideId.Equals((Guid)icdtcm.Predecessor.TargetId))
{
Debug.WriteLine("***Ignoring InstructorCurrentDeckTraversalChanged because it matches the current slide and deck");
return(outputMessages);
}
RTUpdate rtu = this.toc.GetRtUpdate((Guid)icdtcm.Predecessor.Child.TargetId);
if (rtu != null)
{
currentDeckId = icdtcm.DeckId;
currentSlideId = (Guid)icdtcm.Predecessor.TargetId;
}
else
{
Debug.WriteLine("Warning: Navigation failure.");
}
if (outputMessages == null)
{
outputMessages = new List <object>();
}
outputMessages.Add(rtu);
return(outputMessages);
}
else
{
//The beacon also causes navigation in some cases, eg. the initial slide after we join.
//If the beacon has a toc entry we don't already have, add it.
if (!toc.ContainsEntry((Guid)icdtcm.Predecessor.Child.TargetId))
{
string err;
Guid slideId = toc.AddTableOfContentsEntry((CP3Msgs.TableOfContentsEntryMessage)icdtcm.Predecessor.Child,
icdtcm.DeckId, icdtcm.Dispositon, out err);
if (err != null)
{
Debug.WriteLine(err);
}
else if (!slideId.Equals(Guid.Empty))
{
outputMessages = this.getCachedStrokes(slideId);
}
}
//if the beacon indicates a slide other than the current slide, navigate there.
if ((!currentSlideId.Equals((Guid)icdtcm.Predecessor.TargetId)) ||
(!currentDeckId.Equals(icdtcm.DeckId)))
{
currentSlideId = (Guid)icdtcm.Predecessor.TargetId;
RTUpdate rtu = this.toc.GetRtUpdate((Guid)icdtcm.Predecessor.Child.TargetId);
currentDeckId = (Guid)icdtcm.DeckId;
currentSlideId = (Guid)icdtcm.Predecessor.TargetId;
if (outputMessages == null)
{
outputMessages = new List <object>();
}
outputMessages.Add(rtu);
return(outputMessages);
}
}
}
else
{
warning += "Warning: Found InstructorCurrentDeckTraversalChangedMessage message without a TOC Entry. ";
}
return(outputMessages);
}
