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Re: [paragui-users] want to run my dll idea for pg past anyone who cares

From: Andrew Ford
Subject: Re: [paragui-users] want to run my dll idea for pg past anyone who cares to look
Date: Tue, 4 Jun 2002 12:05:03 -0700 (PDT) 
I don't know how many people would use that feature
regularly.  Seems a bit bloaty to me.  How about
adding hooks to the layout parser to enable
application specific tag processing?  Or how about a
plugin-like system for the layout parser?  Is this
possible?

Andrew.

--- Keith Swyer <address@hidden> wrote:
> well, i have been asking a few questions about dlls
> and pg etc latley, so i
> thought i'd run my idea by you...
> 
> - make changes to the loadlayout to incorporate a
> tag in the head for any
> dlls you want to dynamically load
> in your app at runtime. somthing like...
> 
>     <DLL name proxyname baseclass>
> 
>     name - the name of the dll
>     proxyname - the name of the exported function
> that will instantiate your
> new class
>     baseclass - the baseclass that your new class
> uses (maybe not needed)
> 
> - in the loadlayout function all of the dlls will be
> loaded and instantiated
> into a list held in the PG_Application class
>          map <string, baseclass *, less<string> >
> _map;
> 
>     we can then load the dll and insert a new class:
>         _map[name] = instantiate(proxyname)
> 
>  of coarse one limitation is easily seen.....you can
> only use one baseclass
> type for ALL dlls used
> 
> - now, back in your main program you will be able to
> access the _map with
> all of the classes and since they are
> all derived from your baseclass, you don't need to
> know the names of them to
> call functions. and with the map, you can get the
> name of the new class.
> 
> PG_Application will possibly need a few new members.
> ??
> 
> - personally, what i am trying to accomplish is the
> following.
> 
> the main app loads a layout which is the 'main menu'
> and given any dlls in
> the <head> new buttons are added
> to the menu. I am not worried about doing this
> dynamically, whenever new
> dlls are added, you change this main
> layout to add new buttons.  now with the new buttons
> attached to their dlls,
> pressing a button will bring you to
> a new 'area', hiding the main menu and showing all
> of the new 'area' by
> calling a member such as ShowArea() in the dll. THe
> class in the dll in turn
> holds a list of all of its widgets so that we can
> show/hide all of them
> witout have to destroy then create them again by
> moving b/w 'areas'.
> 
> anyway, can anyone see any major flaws or see
> anything that should be
> added.?
> 
> -Keith
> 
> 
> 
> 
> 
> 
> 
> _______________________________________________
> paragui-users mailing list
> address@hidden
>
http://mail.freesoftware.fsf.org/mailman/listinfo/paragui-users


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