+ InfoBarStack = [ ]
+ InfoBarStackSize = 0
+ oldService = None
+ EventMap = { }
+ navcore = None
+
+ @staticmethod
+ def event(evt):
+ set = ServiceEventTracker
+ func_list = set.EventMap.setdefault(evt, [])
+ if func_list:
+ nav = set.navcore
+ cur_ref = nav.getCurrentlyPlayingServiceReference()
+ old_service_running = set.oldRef and cur_ref and cur_ref == set.oldRef and set.oldService and set.oldService == str(nav.getCurrentService())
+# print "old_service_running", old_service_running
+ if not old_service_running and set.oldService:
+ set.oldService = None
+ set.oldRef = None
+ ssize = set.InfoBarStackSize
+ stack = set.InfoBarStack
+ for func in func_list:
+ if (func[0] or # let pass all events to screens not derived from InfoBarBase
+ (not old_service_running and stack[ssize-1] == func[1]) or # let pass events from currently running service just to current active screen (derived from InfoBarBase)
+ (old_service_running and ssize > 1 and stack[ssize-2] == func[1])): # let pass events from old running service just to previous active screen (derived from InfoBarBase)
+ func[2]()
+# else:
+# print "ignore event", ev, "for inactive infobar '" + str(self.screen) + "'"
+
+ @staticmethod
+ def setActiveInfoBar(infobar, old_service, old_ref):
+ set = ServiceEventTracker
+ set.oldRef = old_ref
+ set.oldService = old_service and str(old_service)
+ assert infobar not in set.InfoBarStack, "FATAL: Infobar '" + str(infobar) + "' is already active!"
+ set.InfoBarStack.append(infobar)
+ set.InfoBarStackSize += 1
+# print "ServiceEventTracker set active '" + str(infobar) + "'"
+
+ @staticmethod
+ def popActiveInfoBar():
+ set = ServiceEventTracker
+ stack = set.InfoBarStack
+ if set.InfoBarStackSize:
+ set.InfoBarStackSize -= 1
+ del stack[set.InfoBarStackSize]
+# if set.InfoBarStackSize:
+# print "ServiceEventTracker reset active '" + str(stack[set.InfoBarStackSize-1]) + "'"
+