def __quasimodeBegin(self):
"""
Executed when user presses the quasimode key.
"""
assert self._inQuasimode == False
if self.__quasimodeWindow == None:
logging.info("Created a new quasimode window!")
self.__quasimodeWindow = TheQuasimodeWindow()
self.__eventMgr.triggerEvent("startQuasimode")
self.__eventMgr.registerResponder(self.__onTick, "timer")
self._inQuasimode = True
self.__needsRedraw = True
# Postcondition
assert self._inQuasimode == True
