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Newsgroups: comp.lang.ada
Subject: Re: Custom model in gtkada?
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From: Stephen Leake <stephen_leake@acm.org>
Date: Thu, 06 Jul 2006 03:10:51 -0400
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Date: 2006-07-06T03:10:51-04:00
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"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

>> The marshalling packages in GtkAda are supremely confusing. I'd much
>> prefer an inheritance mechanism there. I started trying to extend
>> GtkAda to provide one, but I didn't have time to really work on it.
>> It's not a simple problem.
>> 
>> But I think marshalling is necessary to any real GUI event handling.
>
> Rather to any asynchronous event. If handling is synchronous, i.e. the
> emitter is blocked until the action will take effect, then there is no need
> to marshal anything.

That's true.

> I'm not sure about the relation, but it seems that a great majority of
> events are synchronous. Another part is asynchronous, but can be pipelined
> as a conveyer. This would be a sort of "transaction" model. The rest
> (actually minor) is fully asynchronous - fire and forget. Only for the rest
> one needs "hard" marshaling.

True. All of the GUI frameworks I've used have not made this
distinction. It would be interesting to try to build a framework that
does.

>> Ok. The GWindows project is part of the Gnavi Sourceforge project; see
>> http://sourceforge.net/projects/gnavi/ . It's not very active, but
>> this might trigger some work.
>
> I'll take a look, when I finish my current project. I am not sure, is it
> Gtk-based or Windows API?

GWindows is built directly on the Windows API.

-- 
-- Stephe