From: Andrea Dallera <andrea@...>
Date: 2010-05-21T19:56:16+09:00
Subject: Re: ruby-qt bindings - is somebody in charge of those?

Hei Jan,

        I am using the version that comes with ubuntu - that's why I
didn't
really bother about versions. I will try to install the gem via rubygems
for windows.

I tried again, removing and reinstalling the packages with synaptic, and
I still get the same segfaults. It is hard for me to provide you with
exact examples that cause the issue, since I myself do not understand
what exactly causes them and the code that generates the segfaults is
built over the GUI framework. A very simple one would be to create a
Qt::CalendarWidget and sending selectedDate=, nil to it, like this:

require 'rubygems'
require 'Qt4'

app = Qt::Application.new([])
hello = Qt::CalendarWidget.new()
hello.resize(200,200)
hello.show()
hello.selectedDate = nil #[BUG] Segmentation fault ruby 1.8.7
(2010-01-10 patchlevel 249) [i486-linux]

Again, this is just a trivial example and it's very easy to write a
workaround for it: more nasty stuff happens when trying to add/remove
items for a ListWidget for example. I will try to build a test case for
that too.

-- 
Andrea Dallera
http://github.com/bolthar/freightrain
http://usingimho.wordpress.com



On Fri, 2010-05-21 at 12:33 +0200, Jan Pilz wrote:
> Hi Andrea,
> 
> yes please use shipped qtruby version which comes with Ubuntu, should
> work.
> I made gem for windows:
> 
> http://rubyforge.org/frs/?group_id=181&release_id=42789
> 
>
http://rubyforge.org/frs/download.php/69355/qtruby4-2.1.0-x86-mswin32.gem
> 
> or do (on windows):
> 
> gem install qtruby4
> 
> 
> 
> it includes all needed libraries. Just use ruby 1.8.6 and install the
> windows gem.
> 
> I also got ubuntu 10.04 and it works very well with package bindings.
> 
> 
> Best regards,
>     Jan
> 
> 
> 
> Am 21.05.2010 11:42, schrieb Andrea Dallera: 
> > Hei Jan,
> > 
> >     thanks a lot for your reply. Sorry, I should have posted more
details
> > about my system:
> > 
> > You're right: I've got qt 4.6.4 on my system (ubuntu 10.04) and my
> > libqt4-ruby version is 4.4.2. I've installed everything using
synaptic
> > so i thought i was safe for that matter and i didn't check for
possible
> > package issues. Ruby version is 1.8.7 p249.
> > I'm also very interested in making everything work under windows
too: i
> > followed this
> >
http://vision.eng.shu.ac.uk/mmvlwiki/index.php/Qt4-QtRuby_installer_for_Microsoft_Windows for installing under windows. I get segfaults under windows too, at the same points as under linux. 
> > 
> > I didn't try to install the gem via rubygems: should I do that
instead?
> > Is there a statically bind version for windows?
> > 
> > Thanks a lot!
> > 
> >   
> 
> 
> -- 
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