private void handleChanged(TECChangedEventArgs obj)
{
if (obj.Sender is TECBid && obj.Value is TECTypical typ)
{
if (obj.Change == Change.Add)
{
if (typ.Instances.Count != 1)
{
TypicalSystems.Add(typ);
}
else
{
Singletons.Add(typ);
}
}
else if (obj.Change == Change.Remove)
{
TypicalSystems.Remove(typ);
Singletons.Remove(typ);
}
}
else if (obj.Sender is TECTypical typParent && obj.Value is TECSystem)
{
if (typParent.Instances.Count == 1)
{
TypicalSystems.Remove(typParent);
Singletons.Add(typParent);
}
else
{
Singletons.Remove(typParent);
if (!TypicalSystems.Contains(typParent))
{
TypicalSystems.Add(typParent);
}
}
}
}