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Re: About porting to Qt.
Re: About porting to Qt.
Fri, 02 May 2008 16:36:36 +0100
On Thu, 2008-05-01 at 15:19 +0200, jose maria gomez wrote:
> Hello, I am Jose Maria, the new offcial maintainer of DDD package. I am still
> having a look to the source and thinking about what could be the betters
> plans for DDD and which could be the better way to do it.
> One of the things I would like to do is to port DDD to Qt gui libraries.
> Anyway, this is not trivial. First of all, DDD need a lot of work to decouple
> GUI from "logic".
Good news that someone has volunteered to replace Andrew.
I don't know if you are aware, but I have already started a project to
write a new GUI backend which can use the Gtkmm widget set. This is in
the "branches/gddd" directory of the Subversion repository.
As a result I have already decoupled most of the logic from the backend
widget set. All the communication goes through a shim or "virtual"
widget set (GUI::Widget, GUI::Container, GUI::Button...).
You may find that you can just write another backend for this interface.
Otherwise, I hope that the interface can be easily modified to support
both Qt and Gtkmm, as well as maybe others yet to be invented. I did
hope that my interface would support more widget sets than just Gtkmm,
but I didn't have enough experience of Qt to try writing anything using
Basically you would have a "QtX::" widget which would just be a
container for the real Qt widget. The callbacks need to appear in the
main program as libsigc++ signals, which are similar to but not
identical to Qt signals. I should think it is quite possible (maybe
even fairly easy) to catch Qt signals and translate them to the libsigc
++ format. I did the same for the Motif (Xt) callbacks, in order to
provide a backward-compatible version which would run on Motif. I'm no
longer actively developing that code, but it worked quite well as far as
I posted some ideas at http://www.ceiriog.eclipse.co.uk/ddd-gtk.pdf
Peter Wainwright (pwainwright at users.sourceforge.net)
> I will inform all of you as soon as posible about the plans. Everybody can
> help of course and your feedback is very important.
> The application is in C, so i would like to rewrite most of them to moderm
> and put QT over all. At the same time I think that a good pluggin system
> could be really useful in this case.
> Thanks a lot.
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