private bool CheckIsDoubleTap(TouchDevice device)
{
if (this.AssociatedObject.TouchesOver.Count() == 1)
{
if (this.preTouchUpInfo != null && this.lastTouchUpInfo == null)
{
bool isVaild = this.preTouchUpInfo.IsVaild(DateTime.Now);
if (isVaild == false)
{
this.preTouchUpInfo = null;
return(false);
}
}
else if (this.lastTouchUpInfo != null)
{
bool isVaild = this.lastTouchUpInfo.IsVaild(DateTime.Now);
if (isVaild == false)
{
this.preTouchUpInfo = null;
this.lastTouchUpInfo = null;
return(false);
}
else
{
double diffTime = (this.lastTouchUpInfo.TouchTime - this.preTouchUpInfo.TouchTime).TotalMilliseconds;
if (diffTime < GestureConsts.Current.VaildDoubleTapTimeDiff)
{
double diff = this.GetPowDis(this.lastTouchUpInfo.TouchPoint, this.preTouchUpInfo.TouchPoint);
if (diff < GestureConsts.Current.DoubleTapDistance)
{
this.currentResult = GestureResult.DoubleTap;
GestureArg arg = new GestureArg(this.AssociatedObject, this.currentResult, device);
List <Point> posInfo = new List <Point>();
posInfo.Add(this.preTouchUpInfo.TouchPoint);
posInfo.Add(this.lastTouchUpInfo.TouchPoint);
arg.Tag = posInfo;
if (this.OnGestureDetector != null)
{
this.OnGestureDetector(this.AssociatedObject, arg);
}
this.isGestureBehavior = true;
this.preTouchUpInfo = null;
this.lastTouchUpInfo = null;
return(true);
}
}
this.preTouchUpInfo = this.lastTouchUpInfo;
this.lastTouchUpInfo = null;
}
}
}
return(false);
}
private void CheckDoubleTapInfo(TouchDevice device)
{
if (this.AssociatedObject.TouchesOver.Count() == 1)
{
if (this.preTouchUpInfo == null)
{
this.preTouchUpInfo = new TouchTapInfo();
this.preTouchUpInfo.Id = device.Id;
this.preTouchUpInfo.TouchPoint = device.GetTouchPoint(Application.Current.MainWindow).Position;
this.preTouchUpInfo.TouchTime = DateTime.Now;
}
else
{
if (lastTouchUpInfo == null)
{
lastTouchUpInfo = new TouchTapInfo();
lastTouchUpInfo.Id = device.Id;
lastTouchUpInfo.TouchPoint = device.GetTouchPoint(Application.Current.MainWindow).Position;
lastTouchUpInfo.TouchTime = DateTime.Now;
}
}
}
}