public static void MoveTier(ITiers h0, int ix0, ITiers h1, int ix1)
{
if (h0 == h1)
{
if (ix0 != ix1)
h0.Tiers.Move(ix0, ix1);
}
else
{
var told = h0[ix0];
h0.RemoveAt(ix0);
(told.TiersHost = h1).Insert(ix1, told);
IHostedItem hi;
if (h0.Count == 0 && (hi = h0 as IHostedItem) != null)
{
Debug.Print("drag removing {0} from {1}", hi.GetType().Name, hi.Host.GetType().Name);
hi.Host.GetList().Remove(hi);
}
}
}
