private static void OnStarOpacityChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
StarRating sr = (StarRating)obj;
double newValue = (double)e.NewValue;
sr.SetStars(sr.currentStars);
}
private static void OnRatingChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
StarRating sr = (StarRating)obj;
int newValue = (int)e.NewValue;
sr.SetStars(newValue);
}