Hello all,
Some people here might have crossed paths with the "menu text missing in
PyKDE apps with Oxygen" bug. Basically menu labels are not rendered when
a PyKDE4 application is used with the Oxygen widget style. After quite a
lot of hair-pulling work over the last few days I've figured out what
the problem is.
First, a solution. Put the following lines in your PyKDE4/__init__.py
file in your Python installation's site-packages directory. (typically
/lib/python2.5/site-packages/PyKDE4/__init__.py).
import sys, dl
sys.setdlopenflags(dl.RTLD_NOW|dl.RTLD_GLOBAL)
I'm sure what the 'official' solution is going to be, but Jim and I will
work it out. This _might_ fix the problems some people have been having
with KConfig and friends. Let me + Jim know if that is the case.
Phil: Does this problem affect PyQt4? I don't know if they use
dynamic_cast much.
For those who are interested in the gory details, the problem is
described here:
http://gcc.gnu.org/faq.html#dso
A dynamic_cast was failing in Oxygen in the menu drawing code, and a
default value was being used instead (an empty string). The thing is
that Python dlopens()s kdeui instead of just being linked to it like a
normal C++ program. This breaks dynamic_cast between kdeui.so and
oxygen.so. I've tested this out with test code here, and the problem
fits this analysis exactly.
A workaround in Python:
http://mail.python.org/pipermail/c++-sig/2005-April/008829.html
cheers,
--
Simon Edwards | KDE-NL, Guidance tools, Guarddog Firewall
[EMAIL PROTECTED] | http://www.simonzone.com/software/
Nijmegen, The Netherlands | "ZooTV? You made the right choice."
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