/// <summary>
/// Called before the ManipulationDelta event occurs.
/// </summary>
/// <param name="e">Event data for the event.</param>
protected override void OnManipulationDelta(ManipulationDeltaRoutedEventArgs e)
{
base.OnManipulationDelta(e);
if (e.Handled)
{
return;
}
if (e.PointerDeviceType == PointerDeviceType.Touch)
{
e.Handled = this.ActualController.HandleTouchDelta(this, e.ToTouchEventArgs(this));
}
}