/// <summary>
/// Update detector
/// </summary>
/// <param name="provider">touch provider</param>
/// <returns>result of detection</returns>
public override GestureDetectionResult Update(ITouchStateProvider provider)
{
if (TrackingToucheCount < FingerCount) // if do not get access to required touch try to get them
{
// remove pre touches that aquired but locked or used by another detector
RemoveInvalidTouches();
// lock tracking touches to get more free touches
LockTrackingTouches();
foreach (var t in provider.GetFreeTouches(TouchPhase.Began, BoundaryFrame))
{
TrackTouch(t);
t.Lock(this);
if (TrackingToucheCount == FingerCount)
{
break;
}
}
if (TrackingToucheCount == FingerCount)// first time we get access to touches
{
// we get access to required touch so begin detection
BeginDetection();
}
else
{
// we do't have required touch to begin detection so unlock touches and let another detector to chance detection
UnlockTrackingTouches();
return(GestureDetectionResult.None);
}
}
GestureDetectionResult result = GestureDetectionResult.None;
if (TrackingToucheCount == FingerCount)
{
result = Detection();
}
if (!LockTouches) // unlock touches if we do'nt need them
{
UnlockTrackingTouches();
}
return(result);
}
/// <summary>
/// Update detector
/// </summary>
/// <param name="provider">Touch provider</param>
/// <returns>Result of detection</returns>
public override GestureDetectionResult Update(ITouchStateProvider provider)
{
int fc = 0;
foreach (var t in provider.GetFreeTouches(TouchPhase.Began, BoundaryFrame))
{
if (t.TapCount == TapCount)
{
TrackTouch(t);
fc++;
}
if (fc == FingerCount)
{
OnDetect();
return(GestureDetectionResult.Detected);
}
}
if (fc > 0)
{
return(GestureDetectionResult.Failed);
}
return(GestureDetectionResult.None);
}
/// <summary> /// Update detector /// </summary> /// <param name="provider">touch provider</param> /// <returns>result of detection</returns> public abstract GestureDetectionResult Update(ITouchStateProvider provider);
