+class InfoBarBase:
+ def __init__(self):
+ ServiceEventTracker.setActiveInfoBar(self)
+ self.onClose.append(self.__close)
+
+ def __close(self):
+ ServiceEventTracker.popActiveInfoBar()
+
class ServiceEventTracker:
"""Tracks service events into a screen"""
-
+ InfoBarStack = [ ]
+ InfoBarStackSize = 0
+
def __init__(self, screen, eventmap):
self.__eventmap = eventmap
- self.session = screen.session
- self.session.nav.event.append(self.__event)
+ self.screen = screen
+ screen.session.nav.event.append(self.__event)
screen.onClose.append(self.__del_event)
def __del_event(self):
- self.session.nav.event.remove(self.__event)
+ self.screen.session.nav.event.remove(self.__event)
def __event(self, ev):
+ set = ServiceEventTracker
+ ssize = set.InfoBarStackSize
+ stack = set.InfoBarStack
if ev in self.__eventmap:
- self.__eventmap[ev]()
+ if not isinstance(self.screen, InfoBarBase) or (ssize and stack[ssize-1] == self.screen):
+ self.__eventmap[ev]()
+# else:
+# print "ignore event", ev, "for inactive infobar '" + str(self.screen) + "'"
+
+ @staticmethod
+ def setActiveInfoBar(infobar):
+ set = ServiceEventTracker
+ 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]) + "'"