URL: https://linuxfr.org/forums/programmation-python/posts/pygtk-et-les-threads--2
Title: PyGTK et les threads.
Authors: thor_tue
Date: 2010年09月01日T18:26:04+02:00
Tags: 
Score: 0
Bonjour. J'essaye de faire la synthèse de ce que j'ai glané sur la toile à propos de pygtk et les threads. J'essaye donc un programme très simple d'expérimentation. J'ai une classe principale, une qui gère 2 threads et une classe thread proprement dite.
Mon problème : lorsque les threads 1 et 2 sont lancés simultanément, j'ai toujours un seul des deux labels qui est mis à jour (analogie avec une situation XOR).
Je commence à bloquer, je n'ai pas trouvé de documentation vraiment approfondie sur ce sujet. D'avance merci.
 
 
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 from threads_manager import ThreadsManager
 import gobject
 gobject.threads_init() # <-----
 import gtk
 
 class Main:
 
 £spaces£ £/spaces£def __init__(self): 
 £spaces£ £/spaces£self.window = gtk.Window()
 £spaces£ £/spaces£self.button1 = gtk.Button('Start/stop thread 1')
 £spaces£ £/spaces£self.button2 = gtk.Button('Start/stop thread 2')
 £spaces£ £/spaces£self.labels = []
 £spaces£ £/spaces£self.labels.append(gtk.Label('*'))
 £spaces£ £/spaces£self.labels.append(gtk.Label('*'))
 £spaces£ £/spaces£self.table = gtk.Table()
 £spaces£ £/spaces£self.table.attach(self.labels[0], 0, 1, 0, 1, xpadding=10)
 £spaces£ £/spaces£self.table.attach(self.button1, 1, 2, 0, 1)
 £spaces£ £/spaces£self.table.attach(self.labels[1], 0, 1, 1, 2, xpadding=10)
 £spaces£ £/spaces£self.table.attach(self.button2, 1, 2, 1, 2)
 £spaces£ £/spaces£self.window.add(self.table)
 £spaces£ £/spaces£self.threads_manager = ThreadsManager(self)
 £spaces£ £/spaces£self.button1.connect('clicked', self.threads_manager.switch_thread_state, 1)
 £spaces£ £/spaces£self.button2.connect('clicked', self.threads_manager.switch_thread_state, 2)
 £spaces£ £/spaces£self.window.connect('destroy', self.quit)
 £spaces£ £/spaces£self.window.set_position(gtk.WIN_POS_CENTER)
 £spaces£ £/spaces£self.window.show_all()
 
 £spaces£ £/spaces£def main(self):
 £spaces£ £/spaces£gtk.main()
 £spaces£ £/spaces£return 0
 
 £spaces£ £/spaces£def quit(self, widget_window):
 £spaces£ £/spaces£# À finir. Informer les threads qu'ils doivent stopper afin de
 £spaces£ £/spaces£# quitter proprement ?
 £spaces£ £/spaces£gtk.main_quit()
 
 if __name__ == '__main__':
 £spaces£ £/spaces£main = Main()
 £spaces£ £/spaces£main.main()
 
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 import threading
 from my_thread import MyThread
 
 class ThreadsManager:
 
 £spaces£ £/spaces£def __init__(self, main):
 £spaces£ £/spaces£self.main = main
 £spaces£ £/spaces£self.th1 = MyThread(self.main, 1)
 £spaces£ £/spaces£self.th2 = MyThread(self.main, 2)
 
 £spaces£ £/spaces£def switch_thread_state(self, widget_button, nb):
 £spaces£ £/spaces£if nb == 1:
 £spaces£ £/spaces£if self.th1.is_running == True:
 £spaces£ £/spaces£self.th1.stop()
 £spaces£ £/spaces£else:
 £spaces£ £/spaces£self.th1.start()
 £spaces£ £/spaces£else: # Therefore nb == 2
 £spaces£ £/spaces£if self.th2.is_running == True:
 £spaces£ £/spaces£self.th2.stop() 
 £spaces£ £/spaces£else:
 £spaces£ £/spaces£self.th2.start()
 
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 import threading, time
 import gobject
 import gtk
 
 class MyThread(threading.Thread):
 
 £spaces£ £/spaces£def __init__(self, main, nb):
 £spaces£ £/spaces£threading.Thread.__init__(self)
 £spaces£ £/spaces£self.main = main
 £spaces£ £/spaces£self.nb = nb
 £spaces£ £/spaces£self.is_running = False
 
 £spaces£ £/spaces£def start(self):
 £spaces£ £/spaces£print 'start thread', self.nb
 £spaces£ £/spaces£self.is_running = True
 £spaces£ £/spaces£while self.is_running == True:
 £spaces£ £/spaces£gobject.idle_add(self.update_label) # <-----
 £spaces£ £/spaces£time.sleep(0.1) 
 £spaces£ £/spaces£gtk.main_iteration() # <-----
 
 £spaces£ £/spaces£def stop(self):
 £spaces£ £/spaces£print 'stop thread', self.nb
 £spaces£ £/spaces£self.is_running = False
 
 £spaces£ £/spaces£def update_label(self):
 £spaces£ £/spaces£# Le but de cette fonction est de montrer comment modifier
 £spaces£ £/spaces£# un objet gtk dans la boucle principale depuis un thread.
 £spaces£ £/spaces£self.main.labels[self.nb-1].set_text(str(time.time()))
</pre>
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