public void ClipViewChanged(object sender, NotifyCollectionChangedEventArgs e)
{
foreach (var it in ClipView.OfType<ClipViewModel>().Select((el, i) => new { Item = el, Index = i }))
{
if (it.Index < 10)
{
it.Item.IndexInClipView = it.Index;
}
else
{
it.Item.IndexInClipView = -1;
}
}
}