Added timer repeat (sometimes, you don't want timer to repeat..)

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/trunk@1867 b32b6428-25c9-4566-ad07-03861ab6144f

libs/lib/xaal/lib/core.py

@@ -239,19 +239,21 @@ class Engine(object):
     #####################################################
     # timers
     #####################################################
-    def add_timer(self,func,period):
-        t = Timer(func,period)
+    def add_timer(self,func,period,repeat=-1):
+        t = Timer(func,period,repeat)
         self.timers.append(t)
 
     def remove_timer(self,timer):
         self.timers.remove(timer)
 
     def process_timers(self):
+        expire_list = []
+        
         if len(self.timers)!=0 :
             now = time.time()
             # little hack to avoid to check timer to often.
             # w/ this enable timer precision is bad, but far enougth
-            if (now - self.__last_timer) < 0.5: return
+            if (now - self.__last_timer) < 0.4: return
 
             for t in self.timers:
                 if t.deadline < now:
@@ -259,7 +261,15 @@ class Engine(object):
                         t.func()
                     except CallbackError as e:
                         logger.error(e.description)
+                    if (t.repeat != -1):
+                        t.repeat = t.repeat-1
+                        if t.repeat == 0:
+                            expire_list.append(t)
                     t.deadline = now + t.period
+            # delete expired timers
+            for t in expire_list:
+                self.remove_timer(t)
+                    
             self.__last_timer = now
 
     #####################################################
@@ -382,7 +392,9 @@ def get_args_method(method):
 
 
 class Timer(object):
-    def __init__(self,func,period):
+    def __init__(self,func,period,repeat):
         self.func = func
         self.period = period
+        self.repeat = repeat
         self.deadline = 0
+