private static void SelectedIndexChangedCallback(DependencyObject owner, DependencyPropertyChangedEventArgs args)
{
ColorsListbox clb = owner as ColorsListbox;
int index = (int)args.NewValue;
clb.SelectedIndex = index;
}
private static void SelectedItemChangedCallback(DependencyObject owner, DependencyPropertyChangedEventArgs args)
{
ColorsListbox clb = owner as ColorsListbox;
ColorItem item = args.NewValue as ColorItem;
clb.SelectedItem = item;
}