/// <summary>
/// Helper class that is run on a different thread that converts the ink coordinates into pixel coordinates
/// </summary>
/// <param name="extracted">The strokes to convert and add to the model</param>
private void HandleInkAddedHelper(Ink extracted)
{
// Adjust for differences in DPI
if (ViewerStateModel.NonStandardDpi)
{
extracted.Strokes.Transform(ViewerStateModel.DpiNormalizationSendMatrix, true);
}
// Get the model object to add it to
lock (WebService.Instance.GlobalModel) {
SimpleWebDeck deck = (SimpleWebDeck)WebService.Instance.GlobalModel.Decks[WebService.Instance.GlobalModel.CurrentDeck];
SimpleWebSlide slide = (SimpleWebSlide)deck.Slides[WebService.Instance.GlobalModel.CurrentSlide - 1];
slide.Inks = new ArrayList();
// Extract each stroke
foreach (Stroke s in extracted.Strokes)
{
// Get the points
System.Drawing.Point[] pts = s.GetPoints();
// Convert and remove duplicates
bool bFirst = true;
ArrayList pts_new = new ArrayList();
System.Drawing.Point last = System.Drawing.Point.Empty;
foreach (System.Drawing.Point p in pts)
{
System.Drawing.Point pNew = new System.Drawing.Point((int)Math.Round(p.X / 26.37f), (int)Math.Round(p.Y / 26.37f));
if (!bFirst && last == pNew)
{
continue;
}
bFirst = false;
last = pNew;
pts_new.Add(pNew);
}
// Add the points to the model
SimpleWebInk stroke = new SimpleWebInk();
stroke.Pts = (System.Drawing.Point[])pts_new.ToArray(typeof(System.Drawing.Point));
stroke.R = s.DrawingAttributes.Color.R;
stroke.G = s.DrawingAttributes.Color.G;
stroke.B = s.DrawingAttributes.Color.B;
stroke.Opacity = (s.DrawingAttributes.RasterOperation == RasterOperation.MaskPen) ? (byte)127 : (byte)255;
stroke.Width = s.DrawingAttributes.Width / 26.37f;
slide.Inks.Add(stroke);
}
}
WebService.Instance.UpdateModel();
}
/// <summary>
/// Handle data posted to up by th web client.
/// </summary>
/// <param name="parameters">The query string parameters.</param>
/// <param name="postData">The post data string.</param>
/// <returns>The response text.</returns>
private string PostHandler(NameValueCollection parameters, string postData)
{
// Get the parts of the post data.
string[] items = postData.Split(new char[] { '|' });
if (items[0] == STUDENT_SUBMISSION_REQUEST) // Handle student submission.
// Deserialize the Array of SimpleStrokeModel from the post data.
{
int clientId = Convert.ToInt32(items[1]);
int deck = Convert.ToInt32(items[2]);
int slide = Convert.ToInt32(items[3]);
object strokes = JSON.Decode(items[4]);
if (strokes is List <object> )
{
ArrayList deserializedStrokes = new ArrayList();
List <object> strokesArray = (List <object>)strokes;
foreach (object stroke in strokesArray)
{
if (stroke is List <KeyValuePair <string, object> > )
{
SimpleWebInk deserializedStroke = new SimpleWebInk();
List <KeyValuePair <string, object> > strokeObject = (List <KeyValuePair <string, object> >)stroke;
foreach (KeyValuePair <string, object> field in strokeObject)
{
switch (field.Key)
{
case "c": // Color
if (field.Value is List <KeyValuePair <string, object> > )
{
List <KeyValuePair <string, object> > color = (List <KeyValuePair <string, object> >)field.Value;
foreach (KeyValuePair <string, object> channel in color)
{
if (channel.Key == "r")
{
deserializedStroke.R = (byte)Math.Round((double)channel.Value);
}
else if (channel.Key == "g")
{
deserializedStroke.G = (byte)Math.Round((double)channel.Value);
}
else if (channel.Key == "b")
{
deserializedStroke.B = (byte)Math.Round((double)channel.Value);
}
}
}
break;
case "w": // Width
if (field.Value is double)
{
deserializedStroke.Width = (float)((double)field.Value);
}
break;
case "o": // Opacity
if (field.Value is double)
{
deserializedStroke.Opacity = (byte)Math.Round((double)field.Value);
}
break;
case "k": // Points
if (field.Value is List <object> )
{
List <object> points = (List <object>)field.Value;
int numPoints = points.Count / 2;
System.Drawing.Point[] pts = new System.Drawing.Point[numPoints];
for (int i = 0; i < numPoints; i++)
{
pts[i].X = (int)((double)points[(i * 2)] * 26.37f);
pts[i].Y = (int)((double)points[(i * 2) + 1] * 26.37f);
}
deserializedStroke.Pts = pts;
}
break;
}
}
deserializedStrokes.Add(deserializedStroke);
}
}
// Notify listeners that a student submission was received.
WebService.Instance.SubmissionReceived(WebServer.Instance, deck, slide, deserializedStrokes);
}
// Log that we responded to a pong.
this.LogSubmissionReceived(clientId, deck, slide);
}
else if (items[0] == QUICK_POLL_REQUEST) // Handle quick poll.
// Notify listeners that a quick poll update was received.
{
WebService.Instance.QuickPollReceived(WebServer.Instance,
new Guid(items[1]), items[2]);
}
else if (items[0] == PING_REQUEST) // Handle ping request.
{
String clientId = items[1];
String clientTimestamp = items[2];
String serverTimestamp = WebService.ToUnixTime(System.DateTime.Now).ToString();
// We should respond with the current timestamp.
String pong = "{\"u\":" + clientId +
",\"c\":" + clientTimestamp +
",\"s\":" + serverTimestamp + "}";
// Log that we responded to a pong.
this.LogPong(Convert.ToInt32(clientId), pong);
return(pong);
}
else if (items[0] == LOG_DUMP_REQUEST) // Handle a client log dump.
{
String clientId = items[1];
String logDump = items[2];
// Print the dumped log to a file.
StreamWriter logFile = new StreamWriter(
System.IO.Path.Combine(System.IO.Path.GetTempPath(),
"CP_ClientPerformanceLog_" + clientId.ToString() + ".txt"));
logFile.Write(logDump);
logFile.Close();
}
// By default, return an empty json object.
return("{}");
}
