Poodletooth-iLand/panda/direct/showbase/EventManager.py

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2015-03-03 16:10:12 -06:00
"""Undocumented Module"""
__all__ = ['EventManager']
from MessengerGlobal import *
from direct.directnotify.DirectNotifyGlobal import *
# This module may not import pandac.PandaModules, since it is imported
# by the Toontown Launcher before the complete PandaModules have been
# downloaded.
#from pandac.PandaModules import *
class EventManager:
notify = None
# delayed import, since this is imported by the Toontown Launcher
# before the complete PandaModules have been downloaded.
PStatCollector = None
# for efficiency, only call import once per module
EventStorePandaNode = None
EventQueue = None
EventHandler = None
def __init__(self, eventQueue = None):
"""
Create a C++ event queue and handler
"""
# Make a notify category for this class (unless there already is one)
if (EventManager.notify == None):
EventManager.notify = directNotify.newCategory("EventManager")
self.eventQueue = eventQueue
self.eventHandler = None
self._wantPstats = None # no config at this point
def doEvents(self):
"""
Process all the events on the C++ event queue
"""
if self._wantPstats is None:
self._wantPstats = config.GetBool('pstats-eventmanager', 0)
from pandac.PandaModules import PStatCollector
EventManager.PStatCollector = PStatCollector
# use different methods for handling events with and without pstats tracking
# for efficiency
if self._wantPstats:
processFunc = self.processEventPstats
else:
processFunc = self.processEvent
while (not self.eventQueue.isQueueEmpty()):
processFunc(self.eventQueue.dequeueEvent())
def eventLoopTask(self, task):
"""
Process all the events on the C++ event queue
"""
self.doEvents()
messenger.send("event-loop-done")
return task.cont
def parseEventParameter(self, eventParameter):
"""
Extract the actual data from the eventParameter
"""
if (eventParameter.isInt()):
return eventParameter.getIntValue()
elif (eventParameter.isDouble()):
return eventParameter.getDoubleValue()
elif (eventParameter.isString()):
return eventParameter.getStringValue()
elif (eventParameter.isWstring()):
return eventParameter.getWstringValue()
elif (eventParameter.isTypedRefCount()):
return eventParameter.getTypedRefCountValue()
elif (eventParameter.isEmpty()):
return None
else:
# Must be some user defined type, return the ptr
# which will be downcast to that type
ptr = eventParameter.getPtr()
if EventManager.EventStorePandaNode is None:
from pandac.PandaModules import EventStorePandaNode
EventManager.EventStorePandaNode = EventStorePandaNode
if isinstance(ptr, EventManager.EventStorePandaNode):
# Actually, it's a kludgey wrapper around a PandaNode
# pointer. Return the node.
ptr = ptr.getValue()
return ptr
def processEvent(self, event):
"""
Process a C++ event
Duplicate any changes in processEventPstats
"""
# **************************************************************
# ******** Duplicate any changes in processEventPstats *********
# **************************************************************
# Get the event name
eventName = event.getName()
if eventName:
paramList = []
for i in range(event.getNumParameters()):
eventParameter = event.getParameter(i)
eventParameterData = self.parseEventParameter(eventParameter)
paramList.append(eventParameterData)
# Do not print the new frame debug, it is too noisy!
if (EventManager.notify.getDebug() and eventName != 'NewFrame'):
EventManager.notify.debug('received C++ event named: ' + eventName +
' parameters: ' + repr(paramList))
# **************************************************************
# ******** Duplicate any changes in processEventPstats *********
# **************************************************************
# Send the event, we used to send it with the event
# name as a parameter, but now you can use extraArgs for that
if paramList:
messenger.send(eventName, paramList)
else:
messenger.send(eventName)
# Also send the event down into C++ land
if self.eventHandler:
self.eventHandler.dispatchEvent(event)
else:
# An unnamed event from C++ is probably a bad thing
EventManager.notify.warning('unnamed event in processEvent')
def processEventPstats(self, event):
"""
Process a C++ event with pstats tracking
Duplicate any changes in processEvent
"""
# ********************************************************
# ******** Duplicate any changes in processEvent *********
# ********************************************************
# Get the event name
eventName = event.getName()
if eventName:
paramList = []
for i in range(event.getNumParameters()):
eventParameter = event.getParameter(i)
eventParameterData = self.parseEventParameter(eventParameter)
paramList.append(eventParameterData)
# Do not print the new frame debug, it is too noisy!
if (EventManager.notify.getDebug() and eventName != 'NewFrame'):
EventManager.notify.debug('received C++ event named: ' + eventName +
' parameters: ' + repr(paramList))
# Send the event, we used to send it with the event
# name as a parameter, but now you can use extraArgs for that
# ********************************************************
# ******** Duplicate any changes in processEvent *********
# ********************************************************
if self._wantPstats:
name = eventName
hyphen = name.find('-')
if hyphen >= 0:
name = name[0:hyphen]
pstatCollector = EventManager.PStatCollector('App:Show code:eventManager:' + name)
pstatCollector.start()
if self.eventHandler:
cppPstatCollector = EventManager.PStatCollector(
'App:Show code:eventManager:' + name + ':C++')
if paramList:
messenger.send(eventName, paramList)
else:
messenger.send(eventName)
# Also send the event down into C++ land
if self.eventHandler:
if self._wantPstats:
cppPstatCollector.start()
self.eventHandler.dispatchEvent(event)
# ********************************************************
# ******** Duplicate any changes in processEvent *********
# ********************************************************
if self._wantPstats:
if self.eventHandler:
cppPstatCollector.stop()
pstatCollector.stop()
else:
# An unnamed event from C++ is probably a bad thing
EventManager.notify.warning('unnamed event in processEvent')
def restart(self):
if None in (EventManager.EventQueue, EventManager.EventHandler):
from pandac.PandaModules import EventQueue, EventHandler
EventManager.EventQueue = EventQueue
EventManager.EventHandler = EventHandler
if self.eventQueue == None:
self.eventQueue = EventManager.EventQueue.getGlobalEventQueue()
if self.eventHandler == None:
if self.eventQueue == EventManager.EventQueue.getGlobalEventQueue():
# If we are using the global event queue, then we also
# want to use the global event handler.
self.eventHandler = EventManager.EventHandler.getGlobalEventHandler()
else:
# Otherwise, we need our own event handler.
self.eventHandler = EventManager.EventHandler(self.eventQueue)
# Should be safe to import the global taskMgr by now.
from direct.task.TaskManagerGlobal import taskMgr
taskMgr.add(self.eventLoopTask, 'eventManager')
def shutdown(self):
# Should be safe to import the global taskMgr by now.
from direct.task.TaskManagerGlobal import taskMgr
taskMgr.remove('eventManager')