private bool CheckIsAreaGesture(ManipulationDeltaEventArgs e)
{
int fingerCount = this.AssociatedObject.TouchesOver.Count();
if (fingerCount > this.gestureFingerCount)
{
this.gestureFingerCount = fingerCount;
}
TouchDevice device = (TouchDevice)e.Manipulators.First();
TouchPoint point = device.GetTouchPoint(Application.Current.MainWindow);
double mendedHeight = GestureDetector.GetMendedHeight(point.Size.Width, point.Size.Height);
if (GestureDetector.IsErase(point.Size.Width, mendedHeight))
{
if (this.OnGestureDetector != null)
{
this.currentResult = GestureResult.Brush;
GestureArg arg = new GestureArg(this.AssociatedObject, this.currentResult, device);
arg.Tag = new Rect(point.Position.X, point.Position.Y, point.Size.Width, mendedHeight);
this.OnGestureDetector(this.AssociatedObject, arg);
}
this.isGestureBehavior = true;
return(true);
}
else
{
if (this.gestureFingerCount == 1)
{
double checkWidht = point.Size.Width;
double checkHeight = mendedHeight;
double checkRadio = checkHeight / checkWidht;
bool isZoom = this.IsZoom(e.CumulativeManipulation.Scale);
if (
(checkRadio > GestureConsts.Current.FingerHeightWidhtRatio || checkWidht < (1 / GestureConsts.Current.FingerHeightWidhtRatio)) &&
(Math.Min(checkWidht, checkHeight) > GestureConsts.Current.OneFingerSize)
)
{
if (this.gestureStatusBehavior != null)
{
this.gestureStatusBehavior(new GestureArg(this.AssociatedObject, GestureResult.MultipleFingers, device));
}
if (e.CumulativeManipulation.Translation.Length > GestureConsts.Current.MultiFingerDragThreshold && isZoom == false)
{
if (this.OnGestureDetector != null)
{
this.currentResult = GestureResult.Drag;
GestureArg arg = new GestureArg(this.AssociatedObject, this.currentResult, device);
arg.Tag = e.CumulativeManipulation.Translation;
this.OnGestureDetector(this.AssociatedObject, arg);
}
this.isGestureBehavior = true;
return(true);
}
}
else if (e.CumulativeManipulation.Translation.Length > GestureConsts.Current.MultiFingerDragThreshold && isZoom == false)
{
if (this.OnGestureDetector != null)
{
this.currentResult = GestureResult.OneFinger;
this.OnGestureDetector(this.AssociatedObject, new GestureArg(this.AssociatedObject, this.currentResult, device));
}
this.isGestureBehavior = true;
return(true);
}
}
}
return(false);
}
public static bool Recoginze(Size size)
{
double height = GestureDetector.GetMendedHeight(size.Width, size.Height);
return(Recoginze(size.Width, height));
}
public static void AttachGestureDetector(this FrameworkElement element, Action <GestureArg> callback, Action <GestureArg, ManipulationDelta, ManipulationDelta> gestureDetalBehavior = null, Action <GestureArg> gestureStatusBehavior = null)
{
GestureDetector.AttachGestureDetector(element, callback, null, gestureDetalBehavior, gestureStatusBehavior);
}