public static bool Recoginze(double width, double height)
{
double ratio = width / height;
double size = width * height;
//double minSize = WhiteBoardParam.EraserMinWidth * WhiteBoardParam.EraserMinHeight;
//double maxSize = WhiteBoardParam.EraserMaxWidth * WhiteBoardParam.EraserMaxHeight;
if (isInTouchWall)
{
if (GestureDetector.IsErase(width, height))
{
return(true);
}
}
else
{
if (size > 6000)
{
return(true);
}
if (size > 2000)
{
if (ratio < 0.4 || ratio > 2.5)
{
return(true);
}
}
else if (size > 1000)
{
return(ratio < 0.45 || ratio > 2.25);
}
else if (size > 800)
{
return(ratio < 0.5 || ratio > 2);
}
}
return(false);
}
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);
}