Re: base widgets growing uncontrollably.... ?

[JD Smith <jdsmith(at)astro.cornell.edu>]

Paul van Delst wrote:
> 
> JD Smith wrote:
> >
> > And to point out the obvious, there's no reason you can't make compound
> > widgets also objects, rather than having an all-in-one object widget
> > design.  You might then have a larger object interface which "composits"
> > (i.e. includes) the sub-objects directly, perhaps creating them itself.
> >
> > Then, cleanup a simple matter of putting in place the relevant "Cleanup"
> > methods, and cleaning up your composited objects in the master Cleanup
> > (i.e. "self.fancycompoundobj1->Cleanup").  You can also allow a single
> > routine to do double duty as a master kill notify and the event<->object
> > interface (for those like me who cringe at littering the otherwise
> > pristine namespace with non-methods):
> >
> > widget_control, base,set_uvalue=self,KILL_NOTIFY="class_event",/REALIZE
> > XManager,'class',base,/NO_BLOCK
> >
> > Then the event callback looks like:
> >
> > ;; Pass on events *AND* serve as a kill notify (destroy the object)
> > pro class_event, ev_or_id
> >   if size(ev_or_id,/TYPE) ne 8 then begin
> >      widget_control, ev_or_id, get_uvalue=self
> >      obj_destroy,self
> >      return
> >   endif
> >   widget_control,ev_or_id.top,get_uvalue=self
> >   self->Event,ev_or_id
> > end
> 
> I will have to trust your much greater expertise on these matters since I'm
> still in the group (probably the minority nowadays) that has no idea how to even
> start using objects in IDL (I did give it a shot when it first came out in IDL
> 5.0(?)). When I see stuff like "self->Event,ev_or_id" the eyes glaze over and I
> take a break from work and check stock quotes or a news site. :o)
> 
> Procedurally yours,


Just think how little restful break-time you'd get in a day if not for
overly compact programmatic mechanisms.

Objectingly(ively?) yours,

JD

P.S. My one line object tutorial:

objects->DoThings, withstuff, LIKE_STRUCTURES=only_smarter