public void Add(T obj)
{
T OldRemovedObj;
if (EqualityComparer != null)
{
OldRemovedObj = (from removed in RemovedList
where EqualityComparer.Equals(removed, obj)
select removed).FirstOrDefault();
}
else
{
OldRemovedObj = (from removed in RemovedList
where removed.Equals(obj)
select removed).FirstOrDefault();
}
if (OldRemovedObj != null)
{
RemovedList.Remove(OldRemovedObj);
ResultingList.Add(OldRemovedObj);
}
else
{
AddedList.Add(obj);
ResultingList.Add(obj);
}
}
private void ChangedList_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (e.NewItems != null && e.NewItems.Count != 0)
{
foreach (T obj in e.NewItems)
{
T OldAddedObj;
OldAddedObj = (from added in AddedList
where EqualityComparer.Equals(added, obj)
select added).FirstOrDefault();
if (OldAddedObj != null)
{
AddedList.Remove(OldAddedObj);
}
else
{
ResultingList.Add(obj);
}
}
}
if (e.OldItems != null && e.OldItems.Count != 0)
{
foreach (T obj in e.OldItems)
{
T OldRemovedObj;
OldRemovedObj = (from removed in RemovedList
where EqualityComparer.Equals(removed, obj)
select removed).FirstOrDefault();
if (OldRemovedObj != null)
{
RemovedList.Remove(OldRemovedObj);
}
else
{
ResultingList.Remove(obj);
}
}
}
if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Reset)
{
ResultingList.Clear();
RemovedList.Clear();
foreach (T obj in AddedList)
{
ResultingList.Add(obj);
}
}
}
void CalculateResultingList()
{
ResultingList.Clear();
foreach (T obj in ChangedList)
{
ResultingList.Add(obj);
}
foreach (T obj in RemovedList)
{
ResultingList.Remove(obj);
}
foreach (T obj in AddedList)
{
ResultingList.Add(obj);
}
}
private void ChangedList_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (e.NewItems != null && e.NewItems.Count != 0)
{
foreach (T obj in e.NewItems)
{
if (AddedList.Contains <T>(obj))
{
List <int> positions = AddedList.FindAll(obj);
T FoundObj = AddedList.ElementAt(positions[0]);
AddedList.Remove(FoundObj);
}
else
{
ResultingList.Add(obj);
}
}
}
if (e.OldItems != null && e.OldItems.Count != 0)
{
foreach (T obj in e.OldItems)
{
if (RemovedList.Contains <T>(obj))
{
List <int> positions = RemovedList.FindAll(obj);
T FoundObj = RemovedList.ElementAt(positions[0]);
RemovedList.Remove(FoundObj);
}
else
{
List <int> positions = ResultingList.FindAll(obj);
T FoundObj = ResultingList.ElementAt(positions[0]);
ResultingList.Remove(FoundObj);
}
}
}
if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Reset)
{
ResultingList.Clear();
RemovedList.Clear();
foreach (T obj in AddedList)
{
ResultingList.Add(obj);
}
}
}