Pierre Barbier de Reuille wrote:
>nephish a écrit :
>
>
>>Hello there !
>>
>>
>
>Hello,
>
>
>
>>i am having a problem with threading.
>>OK, i have this GUI app that i am building with pygtk.
>>there is a process (four actually, just working on getting one right now)
>>that needs to run in the background.
>>
>>
>
>Please, do not mix "process" and "threads" ... there very different ...
>you're talking about threads here, so you want Threads to run in the
>background ...
>
>
>
>>there is a button that starts the background function. But, it locks up
>>the gui. it doesn't run in the background, it locks everything up. It
>>still runs though.
>>
>>
>
>That's just normal ... if you read PyGtk documentation, you'll see you
>need to initialise PyGtk to handle threads :
>
>http://www.async.com.br/faq/pygtk/index.py?req=index -> 20. The GTK
>Mainloop and Threading
>
>http://www.async.com.br/faq/pygtk/index.py?req=show&file=faq20.006.htp
>-> This is exactly your problem !
>
>http://www.pygtk.org/pygtk2reference/gdk-functions.html#function-gdk--threads-init
>
>This is done like this :
>
># First call to PyGtk function ever
>gtk.gdk.threads_init()
># Here initialize what you want
>[...]
># Launch the Gtk loop
>gtk.gdk.threads_enter() # Unneeded if you don't want to call GUI
> # functions from other threads
>gtk.main()
>gtk.gdk.threads_leave() # Needed only with threads_enter
>
>
>
>>one of the things this background process is to do is updata a viewable
>>area on the GUI. Now when run from a terminal, when i hit CTRL+C
>>it stops the thread, but doesnt kill the GUI, and the TextView gets
>>updated right then with everything it should have gotten before.
>>
>>
>>def Serial1():
>> print 'running serial 1'
>> ser = serial.Serial('/dev/ttyS15', 2400, timeout=None)
>> loopy = 1
>> i = 1
>> while loopy < 5:
>> x_Now = strftime('%Y-%m-%d %H:%M:%S')
>> i = i + 1
>> a = ser.read(1)#read one byte
>> a = ord(a) # change byte to integer
>> if (a < 64 )or (a > 127):
>> continue
>> b = ser.read(1)
>> b = ord(b)
>> if (b < 64 )or (b > 127):
>> continue
>> c = ser.read(1)
>> c = ord(c)
>> if c < 92:
>> continue
>> d = ser.read(1)
>> d = ord(d)
>> if d < 128:
>> continue
>> Sensor_ID = (a & 63) + (b & 63) * 64 + (c & 1) * 4096
>> Status = (c & 62) / 2 + (d & 63) * 32
>> c = int(c)
>> d = int(d)
>> x_Now = strftime('%Y-%m-%d %H:%M:%S')
>> f = open('/home/piv/PivData/tmp/Serial/'+str(i), 'w')
>> Input1Data =
>>str(Sensor_ID)+'\t'+str(Status)+'\t--------->\t'+x_Now+'\n'
>> Input1Iter = self.Input1Buffer.get_end_iter()
>> self.Input1Buffer.insert(Input1Iter,
>>Input1Data)
>>
>>f.write(str(Sensor_ID)+'\n'+str(c)+'\n'+str(d)+'\n'+str(Status)+'\n'+x_Now)
>>
>>
>> f.close()
>> thread.start_new(Serial1())
>>
>>the code may not be best form, i am still fairly new at this. so i am
>>also open to
>>any constructive critisism.
>>
>>thanks
>>shawn
>>_______________________________________________
>>Tutor maillist - Tutor@python.org
>>http://mail.python.org/mailman/listinfo/tutor
>>
>>
>>
>
>
>
ok, i am still having a little problem understanding.
tried it but i don't know if i have things set in the right order.
gtk.gdk.threads_init()
# Here initialize what you want
[...]
# Launch the Gtk loop
gtk.gdk.threads_enter() # Unneeded if you don't want to call GUI
# functions from other threads
gtk.main()
gtk.gdk.threads_leave() # Needed only with threads_enter
at the part where you wrote
# Here initialize what you want
[...]
is that where i define the function that will run the thread?
i get the part about having the enter and leave
i just seem to have a hang up (so to speak) with where the function gets
defined.
do i need to build it as a class like the example in the link you sent?
thanks for your help on this
_______________________________________________
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http://mail.python.org/mailman/listinfo/tutor
