Observable collections are an integral part of .NET 3.x and WPF in
particular. Last year I added support for observable collections by
using NH's custom collections API, and made the solution available
here:
http://happynomad121.blogspot.com/2007/12/collections-for-wpf-and-nhibernate.html
All that work took me a month, but it was worth it since it's been
helping a lot of people use WPF together with NH.
When I tried compiling my ObservableCollections project against the
trunk just now, however, I got some unsettling compiler warnings/
errors. Looking at the source code for PersistentGenericList, etc. I
can see the breaking changes made since NH v2.0.1.GA. That is,
all .NET collection interface members were made to be explicitly
implemented. The problem with that, is that I cannot override them
then call their original implementations from my
PersistentObservableList, etc. subclasses.
Afaik, this problem must be solved within the NH sources. What I
would like to do, is add this template method to
AbstractPersistentCollection:
protected abstract void OnCollectionChanged
( NotifyCollectionChangedAction action, object changedItem, int
index );
and then call it from all of its subclasses, whenever the collection's
contents are modified. Just look at my ObservableCollections project
to see how this method's parameters are determined for each collection
and modification type.
We could even take this one step further by implementing
INotifyCollectionChanged on AbstractPersistentCollection. That
interface contains just one member: CollectionChanged. In that case,
I could also provide an implementation for OnCollectionChanged.
I can undertake this task myself, if I've been assured that the patch
I create will be committed once I've finished.
