private void DetectPinchAndPanGestures(TouchActionType touchActionType)
{
TouchManipulationInfo[] infos = new TouchManipulationInfo[_touchDictionary.Count];
_touchDictionary.Values.CopyTo(infos, 0);
if (infos.Length == 1)
{
SKPoint previousPoint = infos[0].PreviousPoint;
SKPoint newPoint = infos[0].NewPoint;
OnPan?.Invoke(this, new PanEventArgs(previousPoint, newPoint, touchActionType));
}
else if (infos.Length >= 2)
{
int pivotIndex = infos[0].NewPoint == infos[0].PreviousPoint ? 0 : 1;
SKPoint pivotPoint = infos[pivotIndex].NewPoint;
SKPoint newPoint = infos[1 - pivotIndex].NewPoint;
SKPoint previousPoint = infos[1 - pivotIndex].PreviousPoint;
OnPinch?.Invoke(this, new PinchEventArgs(previousPoint, newPoint, pivotPoint, touchActionType));
if (TwoFingersPanEnabled)
{
SKPoint delta = newPoint - previousPoint;
SKPoint halfOfDelta = new SKPoint(0.5f * delta.X, 0.5f * delta.Y);
OnPan?.Invoke(this, new PanEventArgs(new SKPoint(), halfOfDelta, touchActionType));
}
}
}
private void DetectPinchAndPanGestures(TouchActionType touchActionType)
{
TouchManipulationInfo[] infos = new TouchManipulationInfo[_touchDictionary.Count];
_touchDictionary.Values.CopyTo(infos, 0);
if (infos.Length == 1)
{
SKPoint previousPoint = infos[0].PreviousPoint;
SKPoint newPoint = infos[0].NewPoint;
OnPan?.Invoke(this, new PanEventArgs(previousPoint, newPoint, touchActionType));
}
else if (infos.Length >= 2)
{
int pivotIndex = infos[0].NewPoint == infos[0].PreviousPoint ? 0 : 1;
SKPoint pivotPoint = infos[pivotIndex].NewPoint;
SKPoint newPoint = infos[1 - pivotIndex].NewPoint;
SKPoint previousPoint = infos[1 - pivotIndex].PreviousPoint;
OnPinch?.Invoke(this, new PinchEventArgs(previousPoint, newPoint, pivotPoint, touchActionType));
}
}