I have an interface created with Glade. It contains a DrawingArea and buttons.

I tried to create a Thread to refresh every X time my Canva. After a few seconds, I get error messages like:

"X Window Server 0.0", "Fatal Error IO 11"

Here is my code :

import pygtk
pygtk.require("2.0")
import gtk
import Canvas
import threading as T
import time
import Map

gtk.gdk.threads_init()

class Interface(object):
    class ThreadCanvas(T.Thread):
        """Thread to display the map"""
        def __init__(self, interface):
            T.Thread.__init__(self)
            self.interface = interface
            self.started = True
            self.start()

        def run(self):
            while self.started:
                time.sleep(2)
                self.interface.on_canvas_expose_event()

        def stop(self):
            self.started = False

    def __init__(self):
        self.interface = gtk.Builder()
        self.interface.add_from_file("interface.glade")

    #Map
    self.map = Map.Map(2,2)

        #Canva
        self.canvas = Canvas.MyCanvas(self.interface.get_object("canvas"),self.game)
        self.interface.connect_signals(self)

        #Thread Canvas
        self.render = self.ThreadCanvas(self)

    def on_btnChange_clicked(self, widget):
    #Change map
        self.map.change()

    def on_interface_destroy(self, widget):
        self.render.stop()
        self.render.join()
        self.render._Thread__stop()
        gtk.main_quit()

    def on_canvas_expose_event(self):
        st = time.time()
        self.canvas.update(self.map)
        et = time.time()
        print "Canvas refresh in : %f times" %(et-st)

    def main(self):
        gtk.main()

How can i fix these errors ?