Implements Observer pattern into the library.

Process can be stopped any time now.

The GUI seem pretty nice and runs without errors.

TODO:
Implement a save session method
Implement GUI compatible with all oses

ivolution/Facemovie_lib.py

@@ -18,8 +18,9 @@ from util import exif
 import Guy
 
 from util.Notifier import Observable
+from util.Notifier import Observer
 
-class FaceMovie(object, Observable):
+class FaceMovie(object, Observable, Observer):
     '''
     Main class of the whole application. 
     Contains the core image processing functions.
@@ -39,6 +40,7 @@ class FaceMovie(object, Observable):
         :type face_param: string        
         """
         Observable.__init__(self) # used to send notifications to process
+        Observer.__init__(self, "Library") # used to receive notification to stop
 
         self.console_logger = logging.getLogger('ConsoleLog') # Used to send messages to the console
         self.my_logger = logging.getLogger('FileLog') # Used to save events into a file
@@ -84,6 +86,13 @@ class FaceMovie(object, Observable):
 
         self.run = True # command used to stop the processing if needed
 
+    def update(self, message):
+        """
+        Used to receive system commands, using the Observer pattern
+        """
+        if len(message) == 1: # system command
+            self.run = False
+
     def list_guys(self):
         """
         Aims at populating the guys list, using the source folder as an input.