/// <summary>
/// Handle frames from Classroom Presenter when it is used as a CXP capability
/// </summary>
/// <param name="rtobj"></param>
private void acceptCPCapabilityFrame(object rtobj)
{
// RTNodeChanged , RTStrokeAdd, and RTStrokeRemove contain a RTFrame which contains the CP message.
if (rtobj is RTNodeChanged)
{
//Classroom Presenter wraps CPPageUpdate inside the RTFrame which is in turn wrapped in
// the RTNodeChanged Extension.
if (((RTNodeChanged)rtobj).Extension is RTFrame)
{
RTFrame rtf = (RTFrame)((RTNodeChanged)rtobj).Extension;
if (rtf.ObjectTypeIdentifier == Constants.PageUpdateIdentifier)
{
if (rtf.Object is PresenterNav.CPPageUpdate)
{
PresenterNav.CPPageUpdate cppu = (PresenterNav.CPPageUpdate)rtf.Object;
currentSlide.SetCPReference(cppu.DocRef.GUID, cppu.PageRef.Index);
}
}
}
}
else if (rtobj is RTStroke)
{
if (((RTStroke)rtobj).Extension is RTFrame)
{
RTFrame rtf = (RTFrame)((RTStroke)rtobj).Extension;
if (rtf.ObjectTypeIdentifier == Constants.StrokeDrawIdentifier)
{
if (rtf.Object is PresenterNav.CPDrawStroke)
{
PresenterNav.CPDrawStroke cpds = (PresenterNav.CPDrawStroke)rtf.Object;
String key = SlideReference.MakeKey(cpds.DocRef.GUID, cpds.PageRef.Index);
if (!slideImages.ContainsKey(key))
{
slideImages.Add(key, new SlideImage());
}
((SlideImage)slideImages[key]).AddInk(cpds.Stroke.Ink, cpds.Stroke.Guid);
}
}
}
}
else if (rtobj is RTStrokeAdd)
{
if (((RTStrokeAdd)rtobj).Extension is RTFrame)
{
RTFrame rtf = (RTFrame)((RTStrokeAdd)rtobj).Extension;
if (rtf.ObjectTypeIdentifier == Constants.StrokeDrawIdentifier)
{
if (rtf.Object is PresenterNav.CPDrawStroke)
{
PresenterNav.CPDrawStroke cpds = (PresenterNav.CPDrawStroke)rtf.Object;
String key = SlideReference.MakeKey(cpds.DocRef.GUID, cpds.PageRef.Index);
if (!slideImages.ContainsKey(key))
{
slideImages.Add(key, new SlideImage());
}
((SlideImage)slideImages[key]).AddInk(cpds.Stroke.Ink, cpds.Stroke.Guid);
}
}
}
}
else if (rtobj is RTStrokeRemove)
{
if (((RTStrokeRemove)rtobj).Extension is RTFrame)
{
RTFrame rtf = (RTFrame)((RTStrokeRemove)rtobj).Extension;
if (rtf.ObjectTypeIdentifier == Constants.StrokeDeleteIdentifier)
{
if (rtf.Object is PresenterNav.CPDeleteStroke)
{
PresenterNav.CPDeleteStroke cpds = (PresenterNav.CPDeleteStroke)rtf.Object;
String key = SlideReference.MakeKey(cpds.DocRef.GUID, cpds.PageRef.Index);
if (!slideImages.ContainsKey(key))
{
slideImages.Add(key, new SlideImage());
}
((SlideImage)slideImages[key]).RemoveInk(cpds.Guid);
}
}
}
}
//Other CP messages are sent directly in RTFrame
else if (rtobj is RTFrame)
{
if (((RTFrame)rtobj).ObjectTypeIdentifier == Constants.CLASSROOM_PRESENTER_MESSAGE)
{
acceptCPNavFrame(((RTFrame)rtobj).Object);
}
else if (((RTFrame)rtobj).ObjectTypeIdentifier == Constants.RTDocEraseAllGuid)
{
//This case is a bit ugly because the RTDoc message contains no info about the deck and slide.
// We need to apply to the current deck and slide (if any)
if ((currentSlide.IsSet) && (slideImages.ContainsKey(currentSlide.GetStringHashCode())))
{
((SlideImage)slideImages[currentSlide.GetStringHashCode()]).RemoveAllInk();
}
}
}
//Still other messages are in native format
else if (rtobj is PresenterNav.CPMessage)
{
//CP still sends some messages in native format
acceptCPNavFrame(rtobj);
}
}
/// <summary>
/// Frames sent by Classroom Presenter 2.0 in Native stand-alone mode
/// </summary>
/// <param name="rtobj"></param>
private void acceptCPNavFrame(object rtobj)
{
if (rtobj is PresenterNav.CPPageUpdate)
{
/// Presenter sends these once per second. These indicate current slide index, deck index
/// and deck type. Just use this to update the current slide pointer
PresenterNav.CPPageUpdate cppu = (PresenterNav.CPPageUpdate)rtobj;
currentSlide.SetCPReference(cppu.DocRef.GUID, cppu.PageRef.Index);
//CPPageUpdate has a deck type too, but we're not using it for now.
//DumpPageUpdate((PresenterNav.CPPageUpdate)rtobj);
}
else if (rtobj is PresenterNav.CPScrollLayer)
{
///Presenter sends these once per second, and during a scroll operation.
///Set the scroll position for the slide in question.
PresenterNav.CPScrollLayer cpsl = (PresenterNav.CPScrollLayer)rtobj;
String key = SlideReference.MakeKey(cpsl.DocRef.GUID, cpsl.PageRef.Index);
if (!slideImages.ContainsKey(key))
{
slideImages.Add(key, new SlideImage());
}
((SlideImage)slideImages[key]).SetScrollPos(cpsl.ScrollPosition, cpsl.ScrollExtent);
//DumpScrollLayer((PresenterNav.CPScrollLayer)rtobj);
}
else if (rtobj is PresenterNav.CPDeckCollection)
{
//Presenter sends this once per second. The only thing we want to get from
//this is the slide size (former ScreenConfiguration). This is a 'global' setting, not a per-slide setting.
PresenterNav.CPDeckCollection cpdc = (PresenterNav.CPDeckCollection)rtobj;
currentSlide.SetSize(cpdc.ViewPort.SlideSize);
//DumpDeckCollection((PresenterNav.CPDeckCollection)rtobj);
//The CPDeckCollection also has slide titles, but we don't care about them here.
}
else if (rtobj is WorkSpace.BeaconPacket) //the original beacon
{
//Presenter sends this once per second. The only thing we want to get from
//this is the background color. This is another global presentation setting.
WorkSpace.BeaconPacket bp = (WorkSpace.BeaconPacket)rtobj;
currentSlide.SetBGColor(bp.BGColor);
//DumpBeacon((BeaconPacket)rtobj);
}
else if (rtobj is PresenterNav.CPDrawStroke) //add a stroke
{
PresenterNav.CPDrawStroke cpds = (PresenterNav.CPDrawStroke)rtobj;
String key = SlideReference.MakeKey(cpds.DocRef.GUID, cpds.PageRef.Index);
if (!slideImages.ContainsKey(key))
{
slideImages.Add(key, new SlideImage());
}
((SlideImage)slideImages[key]).AddInk(cpds.Stroke.Ink, cpds.Stroke.Guid);
}
else if (rtobj is PresenterNav.CPDeleteStroke) //delete one stroke
{
PresenterNav.CPDeleteStroke cpds = (PresenterNav.CPDeleteStroke)rtobj;
String key = SlideReference.MakeKey(cpds.DocRef.GUID, cpds.PageRef.Index);
if (!slideImages.ContainsKey(key))
{
slideImages.Add(key, new SlideImage());
}
((SlideImage)slideImages[key]).RemoveInk(cpds.Guid);
}
else if (rtobj is PresenterNav.CPEraseLayer) //clear all strokes from one page
{
PresenterNav.CPEraseLayer cpel = (PresenterNav.CPEraseLayer)rtobj;
String key = SlideReference.MakeKey(cpel.DocRef.GUID, cpel.PageRef.Index);
if (!slideImages.ContainsKey(key))
{
slideImages.Add(key, new SlideImage());
}
((SlideImage)slideImages[key]).RemoveAllInk();
}
else if (rtobj is PresenterNav.CPEraseAllLayers) //clear all strokes from a deck
{
PresenterNav.CPEraseAllLayers cpeal = (PresenterNav.CPEraseAllLayers)rtobj;
if (cpeal.DocRef.GUID != Guid.Empty)
{
foreach (String key in slideImages.Keys)
{
if (key.StartsWith(cpeal.DocRef.GUID.ToString()))
{
((SlideImage)slideImages[key]).RemoveAllInk();
}
}
}
}
else if (rtobj is WorkSpace.OverlayMessage) //Student submission received
{
//These are seen when Student Submissions are submitted to the instructor, not when they are displayed.
WorkSpace.OverlayMessage om = (WorkSpace.OverlayMessage)rtobj;
String key = SlideReference.MakeKey(om.FeedbackDeck.GUID, om.SlideIndex.Index);
if (!slideImages.ContainsKey(key))
{
slideImages.Add(key, new SlideImage());
}
//The slide image comes from a presentation slide. Here we want to store the current slide image.
String refKey = SlideReference.MakeKey(om.PresentationDeck.GUID, om.PDeckSlideIndex.Index);
if (slideImages.ContainsKey(refKey))
{
SlideImage sourceImage = (SlideImage)slideImages[refKey];
bool isWhiteboard = true;
Image img = sourceImage.GetSlideImage(this.currentSlide.BGColor, out isWhiteboard);
((SlideImage)slideImages[key]).SetImage(img, isWhiteboard);
}
//Add the ink from the student submission
//OtherScribble appears to contain both student ink and any pre-existing instructor ink, but I think it
//used to be in UserScribble. Let's include all ink in both scribbles.
((SlideImage)slideImages[key]).AddInk(((SlideViewer.InkScribble)om.SlideOverlay.UserScribble).Ink);
((SlideImage)slideImages[key]).AddInk(((SlideViewer.InkScribble)om.SlideOverlay.OtherScribble).Ink);
}
else if (rtobj is WorkSpace.ScreenConfigurationMessage)
{
// nothing to do here.
}
else
{
Type t = rtobj.GetType();
Debug.WriteLine("Unhandled Type:" + t.ToString());
}
}
