private void UpdateAncestors(NotifyCollectionChangedEventArgs eventArgs)
{
switch (eventArgs.Action)
{
case NotifyCollectionChangedAction.Add:
CheckIndexValid(eventArgs.NewStartingIndex, "NewStartingIndex", NotifyCollectionChangedAction.Add);
Ancestors.Insert(eventArgs.NewStartingIndex, CreateSubscriberForCollectionItem(eventArgs.NewItems.Cast <object>().Single()));
return;
case NotifyCollectionChangedAction.Remove:
CheckIndexValid(eventArgs.OldStartingIndex, "OldStartingIndex", NotifyCollectionChangedAction.Remove);
Ancestors[eventArgs.OldStartingIndex].Dispose();
Ancestors.RemoveAt(eventArgs.OldStartingIndex);
return;
case NotifyCollectionChangedAction.Replace:
CheckIndexValid(eventArgs.OldStartingIndex, "OldStartingIndex", NotifyCollectionChangedAction.Replace);
Ancestors[eventArgs.OldStartingIndex].Dispose();
Ancestors[eventArgs.OldStartingIndex] = CreateSubscriberForCollectionItem(eventArgs.NewItems.Cast <object>().Single());
return;
case NotifyCollectionChangedAction.Move:
CheckIndexValid(eventArgs.OldStartingIndex, "OldStartingIndex", NotifyCollectionChangedAction.Move);
CheckIndexValid(eventArgs.NewStartingIndex, "NewStartingIndex", NotifyCollectionChangedAction.Move);
var movingAncestor = Ancestors[eventArgs.OldStartingIndex];
Ancestors.RemoveAt(eventArgs.OldStartingIndex);
Ancestors.Insert(eventArgs.NewStartingIndex, movingAncestor);
return;
case NotifyCollectionChangedAction.Reset:
DisposeAndClearAncestors();
foreach (var ancestor in InitAncestors(EffectiveObject))
{
Ancestors.Add(ancestor);
}
return;
default:
throw new ArgumentException(string.Format("Unknown eventArgs.Action enum action: {0}", eventArgs.Action), "eventArgs");
}
}