Activating and Disabling button after process in python and pyGTK

Question

Essentially, I am trying to make a button "active" first, run a process, and then after that process has finished running, disable the button again.

Using pyGTK and Python, the code in question looks like this...

self.MEDIA_PLAYER_STOP_BUTTON.set_sensitive(True) #Set button to be "active"
playProcess = Popen("aplay " + str(pathToWAV) + " >/dev/null 2>&1",shell=True) #Run Process
playProcess.wait() #Wait for process to complete    
self.MEDIA_PLAYER_STOP_BUTTON.set_sensitive(False) #After process is complete, disable the button again

However, this does not work at all.

Any help would be greatly appreciated.

Isn't this just stackoverflow.com/questions/12933970/… that was posted the other day? — deinonychusaur
– deinonychusaur, Commented Oct 18, 2012 at 14:45

huan-kun · Accepted Answer · 2012-11-16 07:44:39Z

All is working normally (python 2.7.3). But if you call playProcess.wait() in gui thread - you freeze gui thread without redrawing (sorry, my english isn`t very well). And are you sure that you try to use subprocess.popen()? Maybe os.popen()?

My small test:

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import pygtk, gtk, gtk.glade
import subprocess

def aplay_func(btn):
        btn.set_sensitive(True)
        print "init"
        playProcess = subprocess.Popen("aplay tara.wav>/dev/null 2>&1", shell=True)
        print "aaa"
        playProcess.wait()
        print "bbb"
        btn.set_sensitive(False)

wTree = gtk.glade.XML("localize.glade")
window = wTree.get_widget("window1")
btn1 = wTree.get_widget("button1")
window.connect("delete_event", lambda wid, we: gtk.main_quit())
btn1.connect("clicked", aplay_func)
window.show_all()
gtk.main()

Result:

init
aaa
bbb

And yes, button is working correctly. Sound too.

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