[Kde-bindings] Qt & SWIG

Wed Jul 24 21:34:19 UTC 2013

Looks like Xamarin has just publicly released the work they have been doing
for the past 6 months surrounding C++ interop to replace Cxxi.  It was just
announced at MonkeySpace conference.  Based on github commits, it looks
like it has been very actively developed by someone dedicated full-time to
this effort.

Miguel's MonkeySpace presentation describing CppSharp:

http://www.slideshare.net/migueldeicaza/monkey-space-2013

github repo:

https://github.com/tritao/CppSharp

On Fri, Jul 12, 2013 at 2:55 PM, Dimitar Dobrev <dpldobrev at yahoo.com> wrote:

>
>     Thank you for your suggestion. However, Qt-Jambi (http://qt-jambi.org/)
> looks abandoned. There already was an attempt to use it through IKVM here -
> http://code.google.com/p/qt4dotnet/ - also abandoned. Even if one were to
> revive it, its dependency on the seemingly dead Qt-Jambi kills any future
> it might have. Besides, I believe performance would be worse than with a
> SWIG-based solution.
>
>     Regards,
>     Dimitar
>
>   ------------------------------
>  *From:* james <james at mansionfamily.plus.com>
> *To:* Dimitar Dobrev <dpldobrev at yahoo.com>; KDE bindings for other
> programming languages <kde-bindings at kde.org>
> *Sent:* Friday, July 12, 2013 9:32 PM
>
> *Subject:* Re: [Kde-bindings] Qt & SWIG
>
>  What is Qt-Jambi doing, or are they in difficulty too?
>
> Qt seems to shed bindings like they are going out of fashion.
>
> I can imagine that's no problem for Phil with PySide, bit perhaps a little
> less NIH elsewhere would work.
>
> I mean - maybe the Qt-Jambi system could be extended?  Even if it means
> going through IKVM?
>
> Or maybe the PySide stuff could be reused - even if the glue is IronPython?
>
> James
>
>
> On 12/07/2013 13:41, Dimitar Dobrev wrote:
>
>
>      Hello, Ruth,
>
>      Glad to hear from you again. I am sorry Qyoto didn't work out for
> you but I do agree SWIG would be a better solution, with better
> performance indeed. I'll try to find free time to work on it as soon as
> possible. However, I cannot make any promise yet.
>
>      Best regards,
>     Dimitar
>
>   ------------------------------
>  *From:* Ruth Ivimey-Cook <ruth at ivimey.org> <ruth at ivimey.org>
> *To:* kde-bindings at kde.org
> *Sent:* Friday, July 12, 2013 2:41 PM
> *Subject:* Re: [Kde-bindings] Qt & SWIG
>
>  Dimitar and others,
>
> I evaluated using Qyoto for a project I'm working on and - with regret for
> all the hard work Dimitar had obviously put in - decided against it, both
> because it was buggy and because it was very slow. When I investigated the
> speed issue SMOKE relies on textual matching of function signatures to call
> functions. Admittedly the hashes, once matched, are hashed and cached, but
> still...   It also involved at least 2 transitions from managed to
> unmanaged code, which IIRC are expensive in themselves.
>
> People I know have used SWIG to good effect but I have no personal
> experience.
>
> A statically linked shim file (not a DLL, if possible) - i.e. a set of
> functions coded in managed code that each make an unmanaged call to the
> "real" function would be the way I would expect. Coding this by hand would
> be painful, so a program to generate them is the obvious response. I
> believe this is the SWIG way.
>
> If it were possible I would look into using something like an XML file
> containing the interface definition, maybe itself initially generated from
> the .h files, and which can then be adapted and enhanced to improve it. If
> the Qt and/or SWIG community were receptive this might become something
> people would support generally - e.g. including PyQt et al. - which would
> benefit everyone.
>
> HTH
> Ruth
>
>
> Dimitar Dobrev wrote:
>
>
>     Dylan,
>
>     Thank you for your suggestion. I know about CXXI but it wouldn't be
> my choice for the following reasons:
>     1. It is both incomplete and abandoned;
>     2. It relies on Reflection.Emit which is not supported on iOS; Qt will
> soon officially run on iOS and it'd be nice if the bindings worked on
> that platform too.
>
>     Regards,
>     Dimitar
>
>   ------------------------------
>  *From:* "Moonfire, D." <d.moonfire at mfgames.com> <d.moonfire at mfgames.com>
> *To:* KDE bindings for other programming languages <kde-bindings at kde.org><kde-bindings at kde.org>
> *Sent:* Thursday, July 11, 2013 9:06 PM
> *Subject:* Re: [Kde-bindings] Qt & SWIG
>
>  On Thu, Jul 11, 2013 at 10:25 AM, Gour <gour at atmarama.net> wrote:
>
> On Thu, 11 Jul 2013 06:31:43 -0700 (PDT)
> Dimitar Dobrev <dpldobrev at yahoo.com> wrote:
>
> > 3. I don't want to have anything to do with SMOKE any more so if you'd
> > like to take this path, you'd be on your own.
>
> Isn't it pity that there is no more interest in having Qt bindings for
> the .NET/Mono? :-(
>
>
> There was an announcement some years back on one of the Mono blogs about
> an interop layer for C++ (https://github.com/mono/cxxi). It was never
> mentioned again and I think a grue ate it, but it looked like a really nice
> set of libraries if someone maintained it beyond the initial proof of
> concept. I also don't know how tightly it is tied to Mono itself and if a
> cross-platform version could be done with it.
>
> Looking at the code, they were also using Qt as the example in their POC.
>
> - Dylan
>
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>
> --
> Software Manager & Engineer
> Tel: 01223 414180
> Blog: http://www.ivimey.org/blog
> LinkedIn: http://uk.linkedin.com/in/ruthivimeycook/
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