ButtonController and ButtonPolicy

[Angus Leeming]

Allan,

I've worked out how to put an abstract ButtonControllerBase in the 
ControlCitation class, or rather in a class that ControlCitation can be 
derived from.

I have one question regarding your ButtonController class. In the header file 
there is:

        // Somebody else owns the FL_OBJECTs we just manipulate them.
        // so? (Lgb)
        //~ButtonController() {}

Well and good. But SURELY the ButtonController owns its ButtonPolicy and so 
this pointer should be deleted by the ButtonController d-tor?

Angus