William, It may bee worth while to read about QTimer [QtCore]( Mark Summerfield's "Rapid GUI Porgramming with Python and Qt", pp. 373, 376. Also QTime [QtCore] and [QTimeEdit [QTGui] p 576. I vaguely recall that there was discussion why he used QTimer of Qt library rather than the simpler "sleep" of Python. Just a shot in the dark - it might be just what is needed. Worth a try, I think.
Al. On Monday 08 April 2013 23:32:45 William Dias wrote: Lucas, Yes, I could, but the question is: why this is not working properly with qt libraries only? Why the slot is not being called? The weird thing is that the issue just occurs occasionally. In the last battery of tests I ran, I've got 149 threads created and only 2 of them didn't make the call to the slot. 2013/4/8 Lucas Tanure <[email protected]> Could you use the queue in python ? with Queue.get([block[, timeout]]) ? Lucas A. Tanure Alves +55 (19) 88176559 On Mon, Apr 8, 2013 at 6:59 PM, William Dias <[email protected]> wrote: Hi, Tibold. Thanks for your reply. If I first move my worker to the new thread and then make the connection should it work? According to the documentation, it would use an auto-connection and since emitter and receiver don't have the same thread affinity, it would create a queued connection. Is it right? Best, 2013/4/8 Tibold Kandrai <[email protected]> Hi, I think you’ll have to use queued connection when you connect the photoStatus signal to the photoStatus slot. See: http://qt-project.org/doc/qt-4.8/threads-qobject.html#signals-and-slots- across-threads Cheers, Tibold From: [email protected] [mailto:[email protected]] On Behalf Of William Dias Sent: 2013 April 08, Monday 17:01 To: [email protected] Subject: [PySide] Signal emitted on a worker thread not being received by main thread Hi, I am facing an intermittent problem with my PySide application. I have a GUI that spawns several threads that are responsible for sending photos to a web server. The threads are created as shown bellow: photoConnectionThread = QThread() photoConnectionObject = http_connection.PhotoConnection(self.filename) photoConnectionObject.photoStatus.connect(self.photoStatus) photoConnectionObject.moveToThread(photoConnectionThread) photoConnectionThread.started.connect(photoConnectionObject.work) photoConnectionThread.finished.connect(self.threadFinished) photoConnectionThread.start() My worker thread tries to upload a photo only once and then emits a signal to the main thread so that the status can be updated in a database. def work(self): logger.info("photo object created on thread " + str(self.thread())) status = sendPhoto(self.filename) self.photoStatus.emit(self.filename, status) QThread.sleep(5) logger.info("exiting thread " + str(self.thread())) self.thread().exit(0) The problem is that, sporadically, the main thread does not receive the signal and consequently doesn't get the status updated. Does anybody have any idea why this is happening? I am using: Python 2.7 PySide 1.1.1 Windows 7 Thank you! _______________________________________________ PySide mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/pyside
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