/// <summary>
/// Builds GestureInfo objects from serialized xml content
/// </summary>
/// <param name="xml"></param>
/// <returns></returns>
public static GestureInfo Desirialize(string xml)
{
Contract.Requires(!string.IsNullOrEmpty(xml), "Xml content can not be null or empty");
GestureInfo gInfo = new GestureInfo();
// Create xml reader from string
MemoryStream stream = new System.IO.MemoryStream(Encoding.UTF8.GetBytes(xml));
//XmlReader reader = XmlReader.Create(stream);
try
{
// Build the deserializer
DataContractSerializer serializer = new DataContractSerializer(typeof(FrameInfo), GetRequiredKnownTypesForTouchFrameEventArgSerialization());
System.Diagnostics.Debug.WriteLine(xml);
gInfo.Frames = serializer.ReadObject(stream) as List<FrameInfo>;
return gInfo;
}
catch (Exception e)
{
//TODO: Testing
string msg = e.Message;
System.Diagnostics.Debug.WriteLine(msg);
throw;
}
finally
{
stream.Dispose();
}
}
/// <summary>
/// Merges the frame lists from different gestureInfo into one list
/// </summary>
/// <param name="self"></param>
/// <returns></returns>
public static GestureInfo Merge(this List<GestureInfo> self)
{
// touchIdPadding is used to ensure unique id for each touch point when multiple sets are merged
int touchIdPadding = 0;
DateTime startTime = DateTime.Now;
DateTime timeline = DateTime.Now;
GestureInfo mergedGestureInfo = new GestureInfo();
int groupId = 0;
foreach (var gesture in self)
{
touchIdPadding += 50;
// 1. Update timestamp of each frame in all list
timeline = startTime;
foreach (var frame in gesture.Frames)
{
timeline = timeline.AddMilliseconds(frame.WaitTime);
frame.TimeStamp = timeline.Ticks;
// 1.1 Update groupIds for individual touch
foreach (var touch in frame.Touches)
{
touch.GroupId = groupId;
touch.TouchDeviceId += touchIdPadding;
}
}
// 2. Combine lists into one
mergedGestureInfo.Frames.AddRange(gesture.Frames);
groupId++;
}
// 3. Sort the unified list
mergedGestureInfo.Frames.Sort(new FrameInfoComparer());
return mergedGestureInfo;
}
private void RunGesture(GestureInfo gestureInfo, GesturePlaybackCompleted playbackCompleted)
{
// Set touch provider to virtual touch provider
var existingInputProvider = TouchInputManager.ActiveTouchProvider;
GestureFramework.UpdateInputProvider(_touchListener);
// Initializing background thread to playback recorded gestures
var threadStart = new ParameterizedThreadStart(RunGesture);
var backgroundThread = new Thread(threadStart);
Tuple<GestureInfo, TouchInputRecorder.GesturePlaybackCompleted> args =
new Tuple<GestureInfo, TouchInputRecorder.GesturePlaybackCompleted>(gestureInfo, playbackCompleted);
backgroundThread.Start(args);
// reset touch provider
GestureFramework.UpdateInputProvider(existingInputProvider);
}
