private static IObservable <bool> GetIsAdornerVisible(InputElement associatedObject, InputElement adorner)
{
var isPointerOverAdorner = adorner.GetObservable(InputElement.IsPointerOverProperty);
var isPointerOverAssociatedObject = associatedObject.GetObservable(InputElement.IsPointerOverProperty);
var delay = TimeSpan.FromSeconds(0.05);
var overAssociated = isPointerOverAssociatedObject.DelayFalse(delay);
var overAdorner = isPointerOverAdorner.DelayFalse(delay);
return(overAssociated
.CombineLatest(overAdorner, (isOverAssociated, isOverAdorner) => isOverAssociated || isOverAdorner)
.DistinctUntilChanged());
}
