/// <summary>
/// Re-renders all strokes which are currently being drawn.
/// </summary>
/// <remarks>
/// This method should be invoked whenever the control onto which the
/// <see cref="Core"/> is drawing is <see cref="Control.Invalidated">invalidated</see>.
/// </remarks>
/// <remarks>
/// This method re-renders only the ink packets which have been received since the last <c>StylusDown</c> event
/// but before a <c>StylusUp</c> event. Once <c>StylusUp</c> is received, the packets are discarded and must
/// be rendered elsewhere.
/// </remarks>
protected internal void Refresh(IntPtr hdc)
{
using (Synchronizer.Lock(this.m_SlideDisplay.SyncRoot)) {
foreach (int stylusId in this.m_CollectedPacketsTable.Keys)
{
// Get the DrawingAttributes which were in effect on StylusDown.
DrawingAttributes atts = ((DrawingAttributes)this.m_DrawingAttributesTable[stylusId]);
// Discard the stroke if we have no DrawingAttributes.
if (atts == null)
{
continue;
}
// Get the tablet description which the renderer will use to interpret the data.
TabletPropertyDescriptionCollection tabletProperties =
((TabletPropertyDescriptionCollection)this.m_TabletPropertiesTable[stylusId]);
Debug.Assert(tabletProperties != null);
// Also add the packets to the collected packets list.
List <int> collected = this.m_CollectedPacketsTable[stylusId];
int[] packets = collected.ToArray();
// Create the temporary stroke which we will immediately render.
Stroke stroke = this.Ink.CreateStroke(packets, tabletProperties);
stroke.DrawingAttributes = atts;
// Now draw the stroke.
this.m_Renderer.Draw(hdc, stroke);
// Immediately delete the stroke, since there's no easy way to save it and modify it for the next data.
this.Ink.DeleteStroke(stroke);
}
}
}
/// <summary>
/// Used by <see cref="Packets"/> and <see cref="StylusUp"/> to render ink.
/// </summary>
private void HandleStroke(int stylusId)
{
// Also add the packets to the collected packets list.
List <int> collected = this.collectedPacketsTable[stylusId];
TabletPropertyDescriptionCollection tabletProperties = this.tabletPropertiesTable[stylusId];
// Construct the final stroke
Stroke finalStroke = this.ink.CreateStroke(collected.ToArray(), tabletProperties);
// Now interpret the stroke
Point[] pts = finalStroke.GetPoints();
Point firstPoint = pts[0];
Point lastPoint = pts[pts.Length - 1];
Rectangle bounding = finalStroke.GetBoundingBox();
// Ensure we sort of draw a horizontal shape
if (bounding.Width > HIMETRIC_WINDOW_WIDTH &&
bounding.Height < HIMETRIC_WINDOW_HEIGHT)
{
// Ensure that the first and last points are far enough apart
if (Math.Abs(firstPoint.X - lastPoint.X) > HIMETRIC_WINDOW_WIDTH)
{
// Go forward or back depending on the direction
if (firstPoint.X < lastPoint.X)
{
this.NextSlide();
}
else
{
this.PrevSlide();
}
}
}
}
/// <summary>
/// Notifies the <see cref="Core"/> of the start of a new stroke.
/// </summary>
/// <remarks>
/// Note that some properties of the <see cref="Core"/> take effect only after a <see cref="StylusDown"/> event.
/// </remarks>
/// <param name="stylusId">The stylus which is being used to draw the stroke.</param>
/// <param name="packets">The packet data describing the stroke.</param>
/// <param name="tabletProperties">
/// The <see cref="TabletPropertyDescriptionCollection"/>
/// used to interpret the packet data, and also subsequent packet data from <see cref="Packets"/> and
/// <see cref="StylusUp"/> events which have the same <paramref name="stylusId"/>.
/// </param>
public void StylusDown(int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
using (Synchronizer.Lock(this.m_SlideDisplay.SyncRoot)) {
if (!this.Enabled)
{
return;
}
// Insert the data into a hashtable using the stylus id as a key.
this.m_PacketsTable[stylusId] = packets;
// Also store the current DrawingAttributes. This is necessary to emulate the default
// DynamicRenderer which only updates its DrawingAttributes on StylusDown.
this.m_DrawingAttributesTable[stylusId] = this.DrawingAttributes;
// Store the packets in the collected packets list so we can retrieve them on Refresh().
List <int> collected = new List <int>(packets);
this.m_CollectedPacketsTable[stylusId] = collected;
// Store the strokeId so RenderIncomingPackets will know when to cancel an incomplete
// stroke if a StylusUp event is missed.
this.m_CurrentStrokeIdTable[stylusId] = strokeId;
// Finally store the tablet properties, which will be used to interpret the packets when rendering a stroke.
this.m_TabletPropertiesTable[stylusId] = tabletProperties;
}
}
private void LoadInkIntoTarget(InkSheetModel sheet, Ink extracted, out int[] ids)
{
Ink restored = extracted;
using (Synchronizer.Lock(sheet.Ink.Strokes.SyncRoot)) {
ids = new int[restored.Strokes.Count];
for (int i = 0; i < ids.Length; i++)
{
Stroke stroke = restored.Strokes[i];
// Remove any strokes that have the same remote Id as the new one.
// Unfortunately, because the InkSheetUndoService cannot preserve stroke referential identity,
// we must do a full search each time and cannot simply keep a table.
if (stroke.ExtendedProperties.DoesPropertyExist(InkSheetMessage.StrokeIdExtendedProperty))
{
object id = stroke.ExtendedProperties[InkSheetMessage.StrokeIdExtendedProperty].Data;
foreach (Stroke existing in sheet.Ink.Strokes)
{
if (existing.ExtendedProperties.DoesPropertyExist(InkSheetMessage.StrokeIdExtendedProperty))
{
if (id.Equals(existing.ExtendedProperties[InkSheetMessage.StrokeIdExtendedProperty].Data))
{
StrokesEventArgs args = new StrokesEventArgs(new int[] { existing.Id });
sheet.OnInkDeleting(args);
sheet.Ink.DeleteStroke(existing);
sheet.OnInkDeleted(args);
}
}
}
}
// The stroke has no association with the current Ink object.
// Therefore, we have to recreate it by copying the raw packet data.
// This first requires recreating the TabletPropertyDescriptionCollection,
// which, for some stupid reason, must be done manually for lack of a better API.
TabletPropertyDescriptionCollection properties = new TabletPropertyDescriptionCollection();
foreach (Guid property in stroke.PacketDescription)
{
properties.Add(new TabletPropertyDescription(property, stroke.GetPacketDescriptionPropertyMetrics(property)));
}
// Create a new stroke from the raw packet data.
Stroke created = sheet.Ink.CreateStroke(stroke.GetPacketData(), properties);
// Copy the DrawingAttributes and all application data
// (especially the StrokesIdExtendedProperty) to the new stroke.
created.DrawingAttributes = stroke.DrawingAttributes;
foreach (ExtendedProperty prop in stroke.ExtendedProperties)
{
created.ExtendedProperties.Add(prop.Id, prop.Data);
}
ids[i] = created.Id;
}
}
}
private void AddInk()
{
using (Synchronizer.Lock(this)) {
// Create an array of stroke Ids in order to fire the InkAdded event later.
int[] ids = new int[this.m_StrokesToAdd.Count];
using (Synchronizer.Lock(this.m_Watcher.m_InkSheet.Ink.Strokes.SyncRoot)) {
for (int i = 0; i < ids.Length; i++)
{
Stroke stroke = this.m_StrokesToAdd[i];
// The stroke probably has no association with the current Ink object.
// Therefore, we have to recreate it by copying the raw packet data.
// This first requires recreating the TabletPropertyDescriptionCollection,
// which, for some stupid reason, must be done manually for lack of a better API.
TabletPropertyDescriptionCollection properties = new TabletPropertyDescriptionCollection();
foreach (Guid property in stroke.PacketDescription)
{
properties.Add(new TabletPropertyDescription(property, stroke.GetPacketDescriptionPropertyMetrics(property)));
}
// Create a new stroke from the raw packet data.
Stroke created = this.m_Watcher.m_InkSheet.Ink.CreateStroke(stroke.GetPacketData(), properties);
// Copy the DrawingAttributes and all application data
// (especially the StrokesIdExtendedProperty) to the new stroke.
created.DrawingAttributes = stroke.DrawingAttributes;
foreach (ExtendedProperty prop in stroke.ExtendedProperties)
{
created.ExtendedProperties.Add(prop.Id, prop.Data);
}
// Get the new stroke's Id so we can fire the InkAdded event.
ids[i] = created.Id;
}
// If the added strokes don't yet have StrokeIdExtendedProperty properties,
// create new Guids for them. Regardless, set this.m_StrokesToRemove
// to the list of stroke Guids.
this.UpdateAndSetStrokesToRemoveIds(this.m_StrokesToAdd);
// Then, unset this.m_StrokesToAdd since they're already added.
this.m_StrokesToAdd = null;
}
// Create the event arguments and add them to the ignore list so the
// InkSheetUndoService won't create an InkUndoer for this change.
StrokesEventArgs args = new StrokesEventArgs(ids);
using (Synchronizer.Lock(this.m_Watcher.m_Ignore.SyncRoot)) {
this.m_Watcher.m_Ignore.Add(args);
}
// Finally fire the appropriate InkAdded event from the InkSheetModel.
this.m_Watcher.m_InkSheet.OnInkAdded(args);
}
}
/// <summary>
/// On stylus-down we record initial ink packets, stroke ID and Tablet properties. Don't return any ink messages yet.
/// </summary>
/// <param name="rtissd"></param>
/// <remarks>
/// By definition CP3 real-time ink is ink that only exists during the act of inking, then is promptly deleted. The static
/// completed strokes are created and deleted by separate messages (InkSheetStrokesAddedMessage/...DeletedMessage).
/// CP3 generates three types of real-time ink messages: stylus down, packets, and stylus up. We translate the accumulated
/// packets into ink strokes (using a constant ID, so that each RT ink message will replace the previous one on WebViewer),
/// then on stylus up, we delete the last RT stroke, and a completed static ink stroke is added by InkSheetStrokesAddedMessage.
/// By definition, real-time messages may be dropped by the CP3 sender, so we need to design with this expectation.
/// The only serious impact of lost RT messages is that they may cause stray RT ink to remain after
/// the static ink is deleted. To work around this, we will keep a list of the RT ink strokes which have been
/// added, but not yet deleted, then on InkSheetStrokesDeleted, we will examine the list, and generate deletes for any strays.
/// </remarks>
internal void AddRealTimeInkSheetStylusDown(UW.ClassroomPresenter.Network.Messages.Presentation.RealTimeInkSheetStylusDownMessage rtissd)
{
//Debug.WriteLine("***** Realtime Ink stylus down StrokeID=" + rtissd.StrokeId.ToString() + "; stylusId=" + rtissd.StylusId.ToString());
// Store the packets array. In CP3 they use a hashtable keyed on the stylusId, but we can probably just assume one int[].
// Also store the current stroke id so that we won't apply the wrong packets if a message is lost.
this.previousRealTimePackets = rtissd.Packets;
this.previousRealTimeStroke = rtissd.StrokeId;
this.previousTabletProperties = rtissd.TabletProperties.CreateTabletPropertyDescriptionCollection();
//For now we assume only one stylus.
}
public TabletPropertyDescriptionCollection CreateTabletPropertyDescriptionCollection()
{
TabletPropertyDescriptionCollection tp = new TabletPropertyDescriptionCollection(this.InkToDeviceScaleX, this.InkToDeviceScaleY);
foreach (TabletPropertyDescriptionInformation info in this.TabletPropertyDescriptions)
{
tp.Add(info.CreateTabletPropertyDescription());
}
return(tp);
}
/// <summary>
/// Occurs when the stylus leaves the digitizer surface.
/// Retrieve the packet array for this stylus and use it to create
/// a new stoke.
/// </summary>
/// <param name="sender">The real time stylus associated with the notification</param>
/// <param name="data">The notification data</param>
void IStylusAsyncPlugin.StylusUp(RealTimeStylus sender, StylusUpData data)
{
// Retrieve the packet array from the hashtable using the cursor id as a key.
int stylusId = data.Stylus.Id;
List <int> collected;
if (!this.m_PacketsTable.TryGetValue(stylusId, out collected))
{
// If ink collection was disabled on StylusDown or if the user is erasing,
// then ignore these packets.
return;
}
int strokeId = this.m_StrokeIdTable[stylusId];
// Also get the DrawingAttributes which were in effect on StylusDown.
DrawingAttributes atts = this.m_DrawingAttributesTable[stylusId];
// Remove this entry from the hash tables since it is no longer needed.
this.m_PacketsTable.Remove(stylusId);
this.m_DrawingAttributesTable.Remove(stylusId);
// Add the newly collected packet data from StylusUp to the array.
collected.AddRange(data.GetData());
// Assemble the completed information we'll need to create the stroke.
int[] packets = collected.ToArray();
TabletPropertyDescriptionCollection tabletProperties =
sender.GetTabletPropertyDescriptionCollection(data.Stylus.TabletContextId);
// Now that we have the data, we're ready to create the stroke and add it to our Ink object.
using (Synchronizer.Lock(this)) { // Ensure that this.(RealTime)InkSheetModel aren't changed unexpectedly.
// If there is no Ink object, then probably the SlideViewer is not looking at a slide,
// so discard the stroke. Otherwise, create the stroke from the collected packets.
// Also discard the stroke if we have no DrawingAttributes.
if (this.InkSheetModel != null && atts != null)
{
int inkStrokeId;
using (Synchronizer.Lock(this.InkSheetModel.Ink.Strokes.SyncRoot)) {
Stroke stroke = this.InkSheetModel.Ink.CreateStroke(packets, tabletProperties);
stroke.DrawingAttributes = atts.Clone();
inkStrokeId = stroke.Id;
}
// Note that this ink stroke's Id is different from the strokeId used by the RealTimeInkSheetModel.
this.InkSheetModel.OnInkAdded(new StrokesEventArgs(new int[] { inkStrokeId }));
}
if (this.RealTimeInkSheetModel != null)
{
this.RealTimeInkSheetModel.OnStylusUp(stylusId, strokeId, data.GetData());
}
}
}
public TabletPropertyDescriptionCollectionInformation(TabletPropertyDescriptionCollection tp)
{
this.InkToDeviceScaleX = tp.InkToDeviceScaleX;
this.InkToDeviceScaleY = tp.InkToDeviceScaleY;
this.TabletPropertyDescriptions = new ArrayList(tp.Count);
foreach (TabletPropertyDescription d in tp)
{
this.TabletPropertyDescriptions.Add(new TabletPropertyDescriptionInformation(d));
}
}
public void OnStylusDown(int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
StylusDownEventHandler handler;
using (Synchronizer.Lock(this)) {
handler = (this.m_DrawingAttributes != null) ? this.m_StylusDownDelegate : null;
}
if (handler != null)
{
handler(this, stylusId, strokeId, packets, tabletProperties);
}
}
private Dictionary <Guid, SizeF> customSlideBounds; //XPS decks use non-standard slide bounds. Map deckID to bounds.
public CP3StateCache()
{
currentPresentationId = Guid.Empty;
currentDeckId = Guid.Empty;
previousTabletProperties = null;
currentSlideId = Guid.Empty;
realTimeStrokesPending = new Dictionary <int, RTStrokeData>();
sheetToSlideLookup = new Hashtable();
sheetToDrawingAttributesLookup = new Hashtable();
strokeCountsBySlideId = new Dictionary <Guid, int>();
toc = new TableOfContents();
pendingInk = new Dictionary <Guid, List <Ink> >();
m_QuickPollAggregator = new QuickPollAggregator();
customSlideBounds = new Dictionary <Guid, SizeF>();
}
/// <summary>
/// Occurs when the stylus leaves the digitizer surface.
/// Retrieve the packet array for this stylus and use it to create
/// a new stoke.
/// </summary>
/// <param name="sender">The real time stylus associated with the notification</param>
/// <param name="data">The notification data</param>
public void StylusUp(RealTimeStylus sender, StylusUpData data)
{
// Retrieve the packet array from the hashtable using the cursor id
// as a key. Then, clean this entry from the hash since it is no
// longer needed.
ArrayList collectedPackets = (ArrayList)myPackets[data.Stylus.Id];
myPackets.Remove(data.Stylus.Id);
// Add the packet data from StylusUp to the array
collectedPackets.AddRange(data.GetData());
// Create the stroke using the specified drawing attributes.
int[] packets = (int[])(collectedPackets.ToArray(typeof(int)));
TabletPropertyDescriptionCollection tabletProperties = myRealTimeStylus.GetTabletPropertyDescriptionCollection(data.Stylus.TabletContextId);
Stroke stroke = myInk.CreateStroke(packets, tabletProperties);
if (stroke != null)
{
stroke.DrawingAttributes.Color = myDynamicRenderer.DrawingAttributes.Color;
stroke.DrawingAttributes.Width = myDynamicRenderer.DrawingAttributes.Width;
}
}
private void HandleStylusDownHelper(object sender, int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
this.FlushPackets(stylusId, strokeId);
if (ViewerStateModel.NonStandardDpi)
{
RealTimeInkSheetModel.ScalePackets(packets, ViewerStateModel.DpiNormalizationSendMatrix);
}
Message message = new RealTimeInkSheetStylusDownMessage(this.m_Sheet, stylusId, strokeId, packets, tabletProperties);
message.Tags = new MessageTags();
message.Tags.SlideID = m_SlideID;
message.Tags.Priority = MessagePriority.RealTime;
message.Tags.BridgePriority = MessagePriority.RealTime;
this.Sender.Send(message, MessagePriority.RealTime);
}
private void HandleStylusDown(object sender, int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
this.StylusDown(stylusId, strokeId, packets, tabletProperties);
}
private void LoadInkIntoTarget(InkSheetModel sheet, byte[] saved, out int[] ids)
{
Ink restored = new Ink();
restored.Load(saved);
using(Synchronizer.Lock(sheet.Ink.Strokes.SyncRoot)) {
ids = new int[restored.Strokes.Count];
for(int i = 0; i < ids.Length; i++) {
Stroke stroke = restored.Strokes[i];
// Remove any strokes that have the same remote Id as the new one.
// Unfortunately, because the InkSheetUndoService cannot preserve stroke referential identity,
// we must do a full search each time and cannot simply keep a table.
if(stroke.ExtendedProperties.DoesPropertyExist(StrokeIdExtendedProperty)) {
object id = stroke.ExtendedProperties[StrokeIdExtendedProperty].Data;
foreach(Stroke existing in sheet.Ink.Strokes) {
if(existing.ExtendedProperties.DoesPropertyExist(StrokeIdExtendedProperty)) {
if(id.Equals(existing.ExtendedProperties[StrokeIdExtendedProperty].Data)) {
StrokesEventArgs args = new StrokesEventArgs(new int[] { existing.Id });
sheet.OnInkDeleting(args);
sheet.Ink.DeleteStroke(existing);
sheet.OnInkDeleted(args);
}
}
}
}
// The stroke has no association with the current Ink object.
// Therefore, we have to recreate it by copying the raw packet data.
// This first requires recreating the TabletPropertyDescriptionCollection,
// which, for some stupid reason, must be done manually for lack of a better API.
TabletPropertyDescriptionCollection properties = new TabletPropertyDescriptionCollection();
foreach(Guid property in stroke.PacketDescription)
properties.Add(new TabletPropertyDescription(property, stroke.GetPacketDescriptionPropertyMetrics(property)));
// Create a new stroke from the raw packet data.
Stroke created = sheet.Ink.CreateStroke(stroke.GetPacketData(), properties);
// Copy the DrawingAttributes and all application data
// (especially the StrokesIdExtendedProperty) to the new stroke.
created.DrawingAttributes = stroke.DrawingAttributes;
foreach(ExtendedProperty prop in stroke.ExtendedProperties)
created.ExtendedProperties.Add(prop.Id, prop.Data);
ids[i] = created.Id;
if (ViewerStateModel.NonStandardDpi)
created.Transform(ViewerStateModel.DpiNormalizationReceiveMatrix);
}
}
}
public void OnStylusDown(int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
StylusDownEventHandler handler;
using(Synchronizer.Lock(this)) {
handler = (this.m_DrawingAttributes != null) ? this.m_StylusDownDelegate : null;
}
if(handler != null)
handler(this, stylusId, strokeId, packets, tabletProperties);
}
private void HandleStylusDownHelper(object sender, int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
this.FlushPackets(stylusId, strokeId);
Message message = new RealTimeInkSheetStylusDownMessage(this.m_Sheet, stylusId, strokeId, packets, tabletProperties);
message.Tags = new MessageTags();
message.Tags.SlideID = this.m_SlideID;
message.Tags.Priority = MessagePriority.RealTime;
message.Tags.BridgePriority = MessagePriority.RealTime;
this.Sender.Send(message, MessagePriority.RealTime);
}
private void HandleStylusDown(object sender, int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
this.StylusDown(stylusId, strokeId, packets, tabletProperties);
}
private void HandleStylusDownHelper(object sender, int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
this.FlushPackets(stylusId, strokeId);
if (ViewerStateModel.NonStandardDpi) {
RealTimeInkSheetModel.ScalePackets(packets, ViewerStateModel.DpiNormalizationSendMatrix);
}
Message message = new RealTimeInkSheetStylusDownMessage(this.m_Sheet, stylusId, strokeId, packets, tabletProperties);
message.Tags = new MessageTags();
message.Tags.SlideID = m_SlideID;
message.Tags.Priority = MessagePriority.RealTime;
message.Tags.BridgePriority = MessagePriority.RealTime;
this.Sender.Send(message, MessagePriority.RealTime);
}
public RealTimeInkSheetStylusDownMessage(RealTimeInkSheetModel sheet, int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
: base(sheet, stylusId, strokeId, packets)
{
this.TabletProperties = new TabletPropertyDescriptionCollectionInformation(tabletProperties);
}
/// <summary>
/// Helper function to marshal stylus down events
/// </summary>
/// <param name="sender">The object that sent the message</param>
/// <param name="stylusId">The id of the stylus that was pressed down</param>
/// <param name="packets">The packets sent by the stylus</param>
/// <param name="tabletProperties">The properties of the tablet</param>
private void HandleStylusDownHelper(object sender, int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
if (this.m_DestSheet != null)
{
this.m_DestSheet.OnStylusDown(stylusId, strokeId, packets, tabletProperties);
}
}
public TabletPropertyDescriptionCollectionInformation(TabletPropertyDescriptionCollection tp)
{
this.InkToDeviceScaleX = tp.InkToDeviceScaleX;
this.InkToDeviceScaleY = tp.InkToDeviceScaleY;
this.TabletPropertyDescriptions = new ArrayList(tp.Count);
foreach(TabletPropertyDescription d in tp)
this.TabletPropertyDescriptions.Add(new TabletPropertyDescriptionInformation(d));
}
private void AddInk()
{
using(Synchronizer.Lock(this)) {
// Create an array of stroke Ids in order to fire the InkAdded event later.
int[] ids = new int[this.m_StrokesToAdd.Count];
using (Synchronizer.Lock(this.m_Watcher.m_InkSheet.Ink.Strokes.SyncRoot)) {
for (int i = 0; i < ids.Length; i++) {
Stroke stroke = this.m_StrokesToAdd[i];
// The stroke probably has no association with the current Ink object.
// Therefore, we have to recreate it by copying the raw packet data.
// This first requires recreating the TabletPropertyDescriptionCollection,
// which, for some stupid reason, must be done manually for lack of a better API.
TabletPropertyDescriptionCollection properties = new TabletPropertyDescriptionCollection();
foreach (Guid property in stroke.PacketDescription)
properties.Add(new TabletPropertyDescription(property, stroke.GetPacketDescriptionPropertyMetrics(property)));
// Create a new stroke from the raw packet data.
Stroke created = this.m_Watcher.m_InkSheet.Ink.CreateStroke(stroke.GetPacketData(), properties);
// Copy the DrawingAttributes and all application data
// (especially the StrokesIdExtendedProperty) to the new stroke.
created.DrawingAttributes = stroke.DrawingAttributes;
foreach (ExtendedProperty prop in stroke.ExtendedProperties)
created.ExtendedProperties.Add(prop.Id, prop.Data);
// Get the new stroke's Id so we can fire the InkAdded event.
ids[i] = created.Id;
}
// If the added strokes don't yet have StrokeIdExtendedProperty properties,
// create new Guids for them. Regardless, set this.m_StrokesToRemove
// to the list of stroke Guids.
this.UpdateAndSetStrokesToRemoveIds(this.m_StrokesToAdd);
// Then, unset this.m_StrokesToAdd since they're already added.
this.m_StrokesToAdd = null;
}
// Create the event arguments and add them to the ignore list so the
// InkSheetUndoService won't create an InkUndoer for this change.
StrokesEventArgs args = new StrokesEventArgs(ids);
using(Synchronizer.Lock(this.m_Watcher.m_Ignore.SyncRoot)) {
this.m_Watcher.m_Ignore.Add(args);
}
// Finally fire the appropriate InkAdded event from the InkSheetModel.
this.m_Watcher.m_InkSheet.OnInkAdded(args);
}
}
/// <summary>
/// Helper function to marshal stylus down events
/// </summary>
/// <param name="sender">The object that sent the message</param>
/// <param name="stylusId">The id of the stylus that was pressed down</param>
/// <param name="packets">The packets sent by the stylus</param>
/// <param name="tabletProperties">The properties of the tablet</param>
private void HandleStylusDownHelper(object sender, int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
if (this.m_DestSheet != null)
this.m_DestSheet.OnStylusDown(stylusId, strokeId, packets, tabletProperties);
}
private void HandleStylusDown(object sender, int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
this.Sender.Post(delegate() {
this.HandleStylusDownHelper(sender, stylusId, strokeId, packets, tabletProperties);
});
}
// Copied from the RealTimeStylus InkCollection example from
// the Microsoft Tablet PC API Sample Applications collection.
/// <summary>
/// Occurs when the stylus touches the digitizer surface.
/// Allocate a new array to store the packet data for this stylus.
/// </summary>
/// <param name="sender">The real time stylus associated with the notification</param>
/// <param name="data">The notification data</param>
void IStylusAsyncPlugin.StylusDown(RealTimeStylus sender, StylusDownData data)
{
// An inverted stylus is reserved for the eraser.
if (data.Stylus.Inverted)
{
return;
}
// Ignore if a touch input;
if (m_TouchSupported)
{
try {
if (sender.GetTabletFromTabletContextId(data.Stylus.TabletContextId).DeviceKind == TabletDeviceKind.Touch)
{
return;
}
}
catch {
m_TouchSupported = false;
}
}
int stylusId = data.Stylus.Id;
// Allocate an empty array to store the packet data that will be
// collected for this stylus.
List <int> collectedPackets = new List <int>();
// Add the packet data from StylusDown to the array
collectedPackets.AddRange(data.GetData());
// Insert the array into a hashtable using the stylus id as a key.
this.m_PacketsTable[stylusId] = collectedPackets;
// Also store the current DrawingAttributes. This is necessary because the default
// DynamicRenderer (which will be used in conjunction with the ink stored by this collector)
// only updates its DrawingAttributes on StylusDown.
this.m_DrawingAttributesTable[stylusId] = this.m_DrawingAttributes;
// Increment the current stroke id.
int strokeId;
if (!this.m_StrokeIdTable.TryGetValue(stylusId, out strokeId))
{
this.m_StrokeIdTable[stylusId] = (strokeId = 0);
}
else
{
this.m_StrokeIdTable[stylusId] = ++strokeId;
}
// And send the packets to anybody who's listening to the RealTimeInk.
using (Synchronizer.Lock(this)) {
if (this.RealTimeInkSheetModel != null)
{
TabletPropertyDescriptionCollection tabletProperties =
sender.GetTabletPropertyDescriptionCollection(data.Stylus.TabletContextId);
this.RealTimeInkSheetModel.OnStylusDown(stylusId, strokeId, data.GetData(), tabletProperties);
}
}
}
private void HandleStylusDown(object sender, int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
this.Sender.Post(delegate() {
this.HandleStylusDownHelper(sender, stylusId, strokeId, packets, tabletProperties);
});
}
/// <summary>
/// Used by <see cref="Packets"/> and <see cref="StylusUp"/> to render ink.
/// </summary>
private void RenderIncomingPackets(int stylusId, int strokeId, int[] packets)
{
using (Synchronizer.Lock(this.m_SlideDisplay.SyncRoot)) {
if (!this.Enabled)
{
return;
}
//Allow rendering packets on disposed TransformableDynamicRenderer.
//if (this.m_Disposed) {
// Debug.WriteLine("Warning: Ignoring request to RenderIncomingPackets on disposed TransformableDynamicRenderer.");
// return;
//}
// Verify that the stroke we're about to render matches the StrokeId
// from the most recent StylusDown event. (If not, then something
// probably got lost over the network.)
int currentStrokeId;
if (!this.m_CurrentStrokeIdTable.TryGetValue(stylusId, out currentStrokeId) || currentStrokeId != strokeId)
{
// First cancel the previous stroke to avoid
// drawing a bogus connecting line between the endpoints.
this.CancelStroke(stylusId);
// Then attempt to start a new stroke. Since we didn't get the
// StylusDown event, we'll have to re-use the old TabletPropertyDescriptionCollection.
// (Theoretically this might have changed between strokes, but that's unlikely.)
// But if there was no previous stroke, and therefore no TabletPropertyDescriptionCollection
// we can use to render the packets, we'll have to give up.
TabletPropertyDescriptionCollection props;
if (!this.m_TabletPropertiesTable.TryGetValue(stylusId, out props))
{
return; // Give up!
}
this.StylusDown(stylusId, strokeId, new int[] { }, props);
}
// At this point we're guaranteed to have executed a (real or simulated)
// StylusDown event, so the entries in all the other dictionaries must exist.
// Get the DrawingAttributes which were in effect on StylusDown.
DrawingAttributes atts = this.m_DrawingAttributesTable[stylusId];
// Discard the stroke if we have no DrawingAttributes.
if (atts == null)
{
return;
}
// Get the tablet description which the renderer will use to interpret the data.
TabletPropertyDescriptionCollection tabletProperties = this.m_TabletPropertiesTable[stylusId];
Debug.Assert(tabletProperties != null);
// Retrieve the packet array from the hashtable using the cursor id as a key.
int[] previousData = this.m_PacketsTable[stylusId];
Debug.Assert(previousData != null);
// Store the new data so that the next rendering job will only have to "connect the dots".
this.m_PacketsTable[stylusId] = packets;
// Also add the packets to the collected packets list.
List <int> collected = this.m_CollectedPacketsTable[stylusId];
collected.AddRange(packets);
//Calculate the distance between the last point of previous stroke, and first point of current stroke.
//If the distance is smaller than distanceThreshold, then draw both previous and current strokes.
bool combinedMode = true;
double distanceThreshold = 2500;
Stroke previousStroke = this.Ink.CreateStroke(previousData, tabletProperties);
Stroke currentStroke = this.Ink.CreateStroke(packets, tabletProperties);
Point lastPointInPrevious = previousStroke.GetPoint(previousStroke.GetPoints().Length - 1);
Point firstPointInCurrent = currentStroke.GetPoint(0);
int x = lastPointInPrevious.X - firstPointInCurrent.X;
int y = lastPointInPrevious.Y - firstPointInCurrent.Y;
if (Math.Sqrt(x * x + y * y) > distanceThreshold)
{
combinedMode = false;
}
// Assemble the completed information we'll need to create the mini-stroke.
int[] combinedPackets = new int[previousData.Length + packets.Length];
previousData.CopyTo(combinedPackets, 0);
packets.CopyTo(combinedPackets, previousData.Length);
// Now that we have the data, we're ready to create the temporary stroke
// which we will immediately render.
Stroke stroke = null;
if (combinedMode)
{
stroke = this.Ink.CreateStroke(combinedPackets, tabletProperties);
}
else
{
stroke = this.Ink.CreateStroke(packets, tabletProperties);
}
stroke.DrawingAttributes = atts;
// Render the stroke onto the canvas.
using (Graphics graphics = this.m_SlideDisplay.CreateGraphics()) {
IntPtr hdc = graphics.GetHdc();
try {
int saved = SaveDC(hdc);
try {
// Copy the clip region from the slide viewer to the DC.
Rectangle bounds = this.m_SlideDisplay.Bounds;
IntersectClipRect(hdc, bounds.Left, bounds.Top, bounds.Right, bounds.Bottom);
// Draw the ink!
this.m_Renderer.Draw(hdc, stroke);
} catch (COMException) {
//0x80004005. Observed this happening when the public node was in a minimized window
//of a remote desktop connection. Ignoring the exception fixes the issue.
} finally {
RestoreDC(hdc, saved);
}
} finally {
graphics.ReleaseHdc();
}
}
// Immediately delete the stroke, since there's no easy way to save it and modify it for the next data.
this.Ink.DeleteStroke(stroke);
}
}
public RealTimeInkSheetStylusDownMessage(RealTimeInkSheetModel sheet, int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties) : base(sheet, stylusId, strokeId, packets)
{
this.TabletProperties = new TabletPropertyDescriptionCollectionInformation(tabletProperties);
}
/// <summary>
/// Notifies the <see cref="Core"/> of the start of a new stroke.
/// </summary>
/// <remarks>
/// Note that some properties of the <see cref="Core"/> take effect only after a <see cref="StylusDown"/> event.
/// </remarks>
/// <param name="stylusId">The stylus which is being used to draw the stroke.</param>
/// <param name="packets">The packet data describing the stroke.</param>
/// <param name="tabletProperties">
/// The <see cref="TabletPropertyDescriptionCollection"/>
/// used to interpret the packet data, and also subsequent packet data from <see cref="Packets"/> and
/// <see cref="StylusUp"/> events which have the same <paramref name="stylusId"/>.
/// </param>
public void StylusDown(int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
using(Synchronizer.Lock(this.m_SlideDisplay.SyncRoot)) {
if(!this.Enabled) return;
// Insert the data into a hashtable using the stylus id as a key.
this.m_PacketsTable[stylusId] = packets;
// Also store the current DrawingAttributes. This is necessary to emulate the default
// DynamicRenderer which only updates its DrawingAttributes on StylusDown.
this.m_DrawingAttributesTable[stylusId] = this.DrawingAttributes;
// Store the packets in the collected packets list so we can retrieve them on Refresh().
List<int> collected = new List<int>(packets);
this.m_CollectedPacketsTable[stylusId] = collected;
// Store the strokeId so RenderIncomingPackets will know when to cancel an incomplete
// stroke if a StylusUp event is missed.
this.m_CurrentStrokeIdTable[stylusId] = strokeId;
// Finally store the tablet properties, which will be used to interpret the packets when rendering a stroke.
this.m_TabletPropertiesTable[stylusId] = tabletProperties;
}
}
private void HandleStylusDownHelper(object sender, int stylusId, int strokeId, int[] packets, TabletPropertyDescriptionCollection tabletProperties)
{
this.FlushPackets(stylusId, strokeId);
Message message = new RealTimeInkSheetStylusDownMessage(this.m_Sheet, stylusId, strokeId, packets, tabletProperties);
message.Tags = new MessageTags();
message.Tags.SlideID = this.m_SlideID;
message.Tags.Priority = MessagePriority.RealTime;
message.Tags.BridgePriority = MessagePriority.RealTime;
this.Sender.Send(message, MessagePriority.RealTime);
}
public TabletPropertyDescriptionCollection CreateTabletPropertyDescriptionCollection()
{
TabletPropertyDescriptionCollection tp = new TabletPropertyDescriptionCollection(this.InkToDeviceScaleX, this.InkToDeviceScaleY);
foreach(TabletPropertyDescriptionInformation info in this.TabletPropertyDescriptions)
tp.Add(info.CreateTabletPropertyDescription());
return tp;
}
