I have just installed Ubuntu Feisty on my laptop and everything appears to work
fine again. So consider the problem solved for the moment ;-).
thanks for all advice I received,
Michael
Patrick Stinson wrote:
there is only one QApplication. Even in apps where you are writing a
graphical plugin that will be used in a native event loop, you have to
manage one QApplication instance. So, if your C++ app created a
QApplication then you don't have to worry about it just create the
PyQt widgets at will. This will all work the best if the qt lib you
are using is a shared library or dll, because you don't want to link
it in twice; once with the C++ app and once with the PyQt4 module.
I Hope that helps a little. I have more info on how I did the same thing
here:
http://www.patrickkidd.com/pk/trac/wiki/EmbeddedPythonWidgets
On 5/16/07, Michael Olberg <[EMAIL PROTECTED]> wrote:
Dear all,
I have a scientific application programmed in C++ with the Qt widget
set. I have
embedded a Python interpreter to allow me to control the application via
scripts. I can even import the python-qt bindings in those scripts and
create
graphical dialogs. So at present everything works(!) as expected.
However, this works with an old setup of Debian sarge and the
python2.3-qt3_3.11-4_i386.deb package. A number of upgrades have
happened since
then, with python, with qt, and even with Debian. With newer versions
non-graphical scripts still work, but any attempt to open Qt dialogs
from the
embedded python interpreter hangs the application.
It appears to me that this has to do with how later versions of the
python-qt
package access the main Qt GUI thread, which in my case is already
started by
the underlying C++ application.
I wonder if this is documented somewhere, with an example on how to
start the
python interpreter so that the C++ and python can share the same Qt
GUI? I'd
very much like to upgrade my system without breaking this application,
which I
use for daily work.
any info appreciated,
Michael
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