internal ReadOnlyObservableCollection(ICompositeList <T> list, System.Collections.ObjectModel.ObservableCollection <T> collection, IEqualityComparer <T> eq) : base(collection)
{
_List = list;
_Collection = collection;
_Disposable = list.ChangesObservable(eq)
.Subscribe(change =>
{
int i = 0;
foreach (var diff in change)
{
switch (diff.Operation)
{
case DiffOperation.Match:
break;
case DiffOperation.Insert:
_Collection.Insert(i, diff.ElementFromCollection2.Value);
break;
case DiffOperation.Delete:
_Collection.RemoveAt(i);
i--;
break;
case DiffOperation.Replace:
_Collection[i] = diff.ElementFromCollection2.Value;
break;
case DiffOperation.Modify:
_Collection[i] = diff.ElementFromCollection2.Value;
break;
default:
throw new ArgumentOutOfRangeException();
}
i++;
}
});
}