maemo.org - Talk - Python, Qt and LibConIC [RESOLVED]

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Python, Qt and LibConIC [RESOLVED]

Is there a way to use LibIconIc in an Qt Python program?

This code runs ok:

Code:

#!/usr/bin/python2.5 

import conic

import gobject, dbus

from dbus.mainloop.glib import DBusGMainLoop



def connection_cb(connection, event):

    print "connection_cb(%s, %s)" % (connection, event)



    status = event.get_status()

    error = event.get_error()

    iap_id = event.get_iap_id()

    bearer = event.get_bearer_type()



    if status == conic.STATUS_CONNECTED:

        print "(CONNECTED (%s, %s, %i, %i)" % (iap_id, bearer, status, error)

    elif status == conic.STATUS_DISCONNECTED:

        print "(DISCONNECTED (%s, %s, %i, %i)" % (iap_id, bearer, status,error)

    elif status == conic.STATUS_DISCONNECTING:

        print "(DISCONNECTING (%s, %s, %i, %i)" % (iap_id, bearer, status,error)





if __name__ == "__main__":

    DBusGMainLoop(set_as_default=True)

    bus = dbus.SystemBus()

    connection = conic.Connection()

    connection.set_property("automatic-connection-events", True)

    connection.connect("connection-event", connection_cb)

    gobject.MainLoop().run()

But if I change it for Qt (using DbusQtMainLoop and QCoreApplication instead of DbusGMainLoop and gobject), I receive a segmentation fault.

Re: Python, Qt and LibConIC

My guess is you need to keep:

Code:

    loop = gobject.MainLoop()

    gobject.threads_init()

    context = loop.get_context()

In your app. I have the same problem with MAFW and gstreamer bindings. Because they are applications revolving around gobject you need a gobject loop or you'll segfault. I modified your code above using QCoreApplication and DbusQtMainLoop as you suggested and got it to work including the code above in the "__main__" method. Adding those three lines you start a gobject MainLoop as a thread in the background so it doesn't interfere with your app, but it's obviously kind of ugly (but necessary) having to import gobject in a QT app.

Re: Python, Qt and LibConIC

It worked like a charm....despite the fact that it's a ugly workaround!

Re: Python, Qt and LibConIC

Another GStreamer + PyQt hint can be found here:

http://www.diotavelli.net/PyQtWiki/U...amer_with_PyQt

It would be good to collect these interoperability solutions somewhere. :-)