Interface / Pointer GUI Association
Posted on 2000-04-24
I would like to know the best way to store an interface reference in an assocaited pointer.
For example, in a listbox containing cats, with each item representing an ICat reference, I would like to store the ICat reference in the Objects property of the list item. Another example is using a TTreeView (cats in a tree?) and the Node's Data property.
I have accomplished this in the past using records (one sole member of type ICat and using the record pointer), and also by bypassing reference counting by typecasting the interface to a void pointer. The first method is tedious, and the second one is dangerous.
Is there some elegant construct or alternate method out there that I do not know about? Sure, one can use TInterfaceList to maintain a list of references, but there is still no way of directly associating that reference with the Objects or Data properties, so this discussion is not further advanced by such an observation.
What do you do?