[PyQt] QMainWindow freezes

[rennnyyy at nem-pro.de]

Yeah a similar code is at the bottom of my source, I just didn't copy it as well as I didn't copy the imports I have. Problem still exists.


----- Original Message -----
From: niceguysan at gmail.com
To: rennnyyy at nem-pro.de
Date: 15.04.2013 13:05:12
Subject: Re: [PyQt] QMainWindow freezes


> make sure u have something like this when u call QMainwindow
> 
> def main(argv):
> 
>    app = QtGui.QApplication(argv)
>    yourMainWin = MainWindUI()
>    yourMainWin.show()
>    app.exec_()
> 
> if __name__ == "__main__":
>    sys.exit(main(sys.argv))
> 
> 
> On Mon, Apr 15, 2013 at 4:27 PM, <rennnyyy at nem-pro.de> wrote:
> 
>> Hey guys,
>> 
>> I have a problem with my project. First of all I want to describe what I'm
>> trying to create and after that I explain the problems I have.
>> 
>> The project hooks all keyboard events that are done with the help of
>> "pyHook" (I know that sounds like hacking now, but the software will only
>> be used by myself). If specific keys are pressed they will be added to a
>> dictionary which contains information about the time, when the key was
>> pressed. Furthermore I wrote a GUI with the help of pyQt, which should
>> display the difference between the current time and the time, when the key
>> was pressed (more or less a timer that). To keep the displayed time
>> difference up-to-date I have a infinite QTimer which call a function that
>> recalculates the difference and display it in a QLabel. Here's my
>> sourcecode:
>> 
>> class KeyboardHook(threading.Thread):
>>     def __init__(self):
>>           threading.Thread.__init__(self)
>>           self.start()
>> 
>>     def OnKeyboardEvent(self, event):
>>         key = event.Key
>>         if key in ('F1', 'F2', 'F3', 'F4', 'F5', 'F6', 'F7', 'F8', 'F9',
>> 'F10'):
>>            gui.OnAddKey(key)
>>         return True
>> 
>>     def run(self):
>>         hookManager = pyHook.HookManager()
>>         hookManager.KeyDown = self.OnKeyboardEvent
>>         hookManager.HookKeyboard()
>>         pythoncom.PumpMessages()
>> 
>> class GUI(QtGui.QMainWindow):
>>     def __init__(self):
>>         QtGui.QMainWindow.__init__(self)
>>         self.resize(460,276)
>>         self.setWindowTitle('LoL Timer')
>> 
>>         # Add KeyboardHook
>>         self.keyboardHook = KeyboardHook()
>> 
>>         # Timers
>>         self.timers = {}
>> 
>>         # Timer
>>         self.timer = QtCore.QTimer();
>>         QtCore.QObject.connect(self.timer, QtCore.SIGNAL("timeout()"),
>> self.OnUpdate)
>>         self.timer.start(100)
>> 
>>         # Textsfields
>>         self.textfields = {}
>>         for i in xrange(1, 11):
>>             tmp = QtGui.QLabel(QtCore.QString('-'), self)
>> 
>>             if i % 2 == 1:
>>                 tmp.move(30, 30 + ((i - 1)/ 2) * 40)
>>             else:
>>                 tmp.move(230, 30 + ((i - 1)/ 2) * 40)
>>             self.textfields['F%s' %(i)] = tmp
>> 
>>     def OnAddKey(self, key):
>>         if key in self.timers:
>>             del self.timers[key]
>>         else:
>>             self.timers[key] = time.time()
>> 
>>     def OnUpdate(self):
>>         for i in ('F1', 'F2', 'F3', 'F4', 'F5', 'F6', 'F7', 'F8', 'F9',
>> 'F10'):
>>             try:
>> 
>> self.textfields[i].setText(QtCore.QString(str(self.timers[i])))
>>             except:
>>                 self.textfields[i].setText(QtCore.QString('-'))
>> 
>> The problem I've got: Sometimes I press one of the specific keys the GUI
>> freezes. First I thought about a problem with the different threads, trying
>> to access the same variable at one time. But when I changed the OnUpdate
>> function to
>> 
>>     def OnUpdate(self):
>>         for i in ('F1', 'F2', 'F3', 'F4', 'F5', 'F6', 'F7', 'F8', 'F9',
>> 'F10'):
>>             test = self.timers[i]
>>             try:
>>                 pass
>>             except:
>>                 pass
>> 
>> the GUI never freezed (of course it did not update the timers). The
>> variables that are accessed are the same, so I think the threads are not
>> the problem.
>> 
>> Do you have any idea, what I'm doing wrong? Or is my whole concept of
>> writing this software wrong?
>> 
>> Thanks in advance.
>> 
>> 
>> Rennnyyy
>> 
>> 
>> PS: The software is designed for helping me in a game, where I need
>> accurate timers. That's why I need a global keyboard hook, to get key
>> events even if my software has not the main focus.
>> 
>> 
>> 
>> 
>> _______________________________________________
>> PyQt mailing list    PyQt at riverbankcomputing.com
>> http://www.riverbankcomputing.com/mailman/listinfo/pyqt
>> 
> 
> 
> 
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