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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.screen = screen
screen.session.nav.event.append(self.__event)
screen.onClose.append(self.__del_event)
def __del_event(self):
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:
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]) + "'"
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