/// <summary>
/// Handles changes to the Rotation property.
/// </summary>
/// <param name="d">SprocketControl</param>
/// <param name="e">DependencyProperty changed event arguments</param>
private static void OnRotationChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
SprocketControl sprocket = (SprocketControl)d;
Direction oldRotation = (Direction)e.OldValue;
Direction newRotation = sprocket.Rotation;
sprocket.OnRotationChanged(oldRotation, newRotation);
}
