Stop the activity with stop button

The activity does not stop running. Confirmed by executing it from terminal with sugar-activity3
To reproduce - Choose a game of 2 or 3 or 4 players from crazyeights box. Now click the stop button. The activity doen't stop execution.

activity.py

@@ -61,6 +61,7 @@ def build_toolbar(self):
         stop_button = StopButton(self)
         toolbar_box.toolbar.insert(stop_button, -1)
         stop_button.show()
+        stop_button.connect('clicked', self._stop_cb)
 
         self.show_all()
 
@@ -94,3 +95,6 @@ def load_image_from_journal(self):
                 del chooser
 
         return jobject
+
+    def _stop_cb(self, button):
+        self.game.running = False

crazyeights.py

@@ -31,6 +31,7 @@
 import fiftytwo
 from fiftytwo import card_width, card_height, UP, DOWN
 import math, random
+import sys
 import pygame
 from pygame.locals import *
 
@@ -252,6 +253,7 @@ def special_cards(deck, discard, players, whosturn, cardprocessed, choosesuitima
     return cardprocessed, whosturn, currentsuit
 
 def main(playertypes, screensize):
+    running = True
     sw = screensize[0]
     sh = screensize[1]
 
@@ -345,7 +347,7 @@ def main(playertypes, screensize):
 
     screen.fill(BGCOL)
 
-    while 1:
+    while running:
         fpslimiter.tick(20)
 
         # Check for win
@@ -399,6 +401,9 @@ def main(playertypes, screensize):
         while Gtk.events_pending():
             Gtk.main_iteration()
 
+        if not running:
+            break
+
         for event in pygame.event.get():
 
             if event.type == KEYDOWN:
@@ -437,7 +442,8 @@ def main(playertypes, screensize):
                         whosturn = end_turn(players, whosturn)
 
             elif event.type == QUIT:
-                return
+                running = False
+                return running
 
             """elif event.type == olpcgames.CONNECT:
                 print "Connect event."

run.py

@@ -58,8 +58,10 @@ def __init__(self, parent):
         pass
 
     def run(self):
+        self.running = True
         for event in pygame.event.get():
             if event.type == pygame.QUIT:
+                self.running = False
                 return
             elif event.type == pygame.VIDEORESIZE:
                 pygame.display.set_mode(
@@ -116,31 +118,36 @@ def run(self):
 
         fpslimiter = pygame.time.Clock()
 
-        while True:
+        while self.running:
             fpslimiter.tick(20)
 
             while Gtk.events_pending():
                 Gtk.main_iteration()
+            if not self.running:
+                break
 
             for event in pygame.event.get():
 
-                if event.type == pygame.MOUSEMOTION:
+                if event.type == pygame.QUIT:
+                    self.running = False
+                    return
+                elif event.type == pygame.MOUSEMOTION:
                     mouseposition[0] = event.pos[0]
                     mouseposition[1] = event.pos[1]
                 elif event.type == pygame.MOUSEBUTTONDOWN:
                     mouseposition[2] = 1
                 elif event.type == pygame.MOUSEBUTTONUP:
                     mouseposition[2] = 0
                     if not decksel and c8s2p.detect_click(event.pos):
-                        crazyeights.main((names[4], names[0]), screensize)
+                        self.running = crazyeights.main((names[4], names[0]), screensize)
                         self.screen.fill(MMCOL)
                         pygame.event.set_allowed(pygame.MOUSEMOTION)
                     elif not decksel and  c8s3p.detect_click(event.pos):
-                        crazyeights.main((names[1], names[2], names[0]), screensize)
+                        self.running = crazyeights.main((names[1], names[2], names[0]), screensize)
                         self.screen.fill(MMCOL)
                         pygame.event.set_allowed(pygame.MOUSEMOTION)
                     elif not decksel and  c8s4p.detect_click(event.pos):
-                        crazyeights.main((names[1], names[2], names[0], names[3]), screensize)
+                        self.running = crazyeights.main((names[1], names[2], names[0], names[3]), screensize)
                         self.screen.fill(MMCOL)
                         pygame.event.set_allowed(pygame.MOUSEMOTION)
                     elif not decksel and maindeck.detect_click(event.pos):