Le 23/10/2008, "Timo" <[EMAIL PROTECTED]> a écrit:
>The getLink() from above does indeed get called from within a thread,
>not the main loop. Would this be the problem?
Yes, no doubt!
>Because, in the same
>thread, I'm also moving a progressbar and filling up a treeview, and
>they seem to work fine.
Well,
First, you need to init the threads, at the begin of your program:
gtk.gdk.threads_init()
gtk.gdk.threads_enter()
and call:
gtk.gdk.threads_leave()
at the end (not really needed).
Then, use a serializer. I attached mine. When you need to call a GUI
stuff from your thread, use:
ret = serializer.apply(<func>, <param1>, <param2>...)
This will push the <func> on a queue (note that you can wait for a return
value if needed). To have the queue executed, you need to call:
gobject.timeout_add(50, serializer.processWork)
before the gtk main loop. So, the serializer queue will be checked every
50 ms (try different values depending of your config).
Hope this helps.
--
Frédéric
# -*- coding: utf-8 -*-
""" Panohead remote control.
License
=======
- B{papywizard} (U{http://trac.gbiloba.org/papywizard}) is Copyright:
- (C) 2007-2008 Frédéric Mantegazza
This software is governed by the B{CeCILL} license under French law and
abiding by the rules of distribution of free software. You can use,
modify and/or redistribute the software under the terms of the CeCILL
license as circulated by CEA, CNRS and INRIA at the following URL
U{http://www.cecill.info}.
As a counterpart to the access to the source code and rights to copy,
modify and redistribute granted by the license, users are provided only
with a limited warranty and the software's author, the holder of the
economic rights, and the successive licensors have only limited
liability.
In this respect, the user's attention is drawn to the risks associated
with loading, using, modifying and/or developing or reproducing the
software by the user in light of its specific status of free software,
that may mean that it is complicated to manipulate, and that also
therefore means that it is reserved for developers and experienced
professionals having in-depth computer knowledge. Users are therefore
encouraged to load and test the software's suitability as regards their
requirements in conditions enabling the security of their systems and/or
data to be ensured and, more generally, to use and operate it in the
same conditions as regards security.
The fact that you are presently reading this means that you have had
knowledge of the CeCILL license and that you accept its terms.
Module purpose
==============
Graphical toolkit helper
Implements
==========
- Serializer
Usage
=====
This serializer allows threads to serialize events to
be processed by the main trhead.
@author: Frédéric Mantegazza
@copyright: (C) 2007-2008 Frédéric Mantegazza
@license: CeCILL
"""
__revision__ = "$Id: serializer.py 557 2008-09-18 18:51:24Z fma $"
import sys
import Queue
class Serializer(object):
""" Events serializer.
"""
def __init__(self):
""" Init the serializer
"""
self.__workRequestQueue = Queue.Queue()
self.__resultQueue = Queue.Queue()
def apply(self, work, *args, **kwargs):
""" Add an event to the serializer queue.
Called by an external thread which want to display
something on the GUI.
@param work: work to push on the queue
@type work: python callable
"""
self.__workRequestQueue.put((work, args, kwargs))
result, exception = self.__resultQueue.get()
if exception:
raise exception[0], exception[1], exception[2]
else:
return result
def processWork(self):
""" Execute a queued work.
Called by the main thread to process one
pending work in the queue.
"""
try:
work, args, kwargs = self.__workRequestQueue.get_nowait()
try:
result = work(*args, **kwargs)
except:
exception = sys.exc_info()
result = None
else:
exception = None
self.__resultQueue.put((result, exception))
except Queue.Empty:
pass
return True
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