88 lines
3.2 KiB
Python
88 lines
3.2 KiB
Python
from pygame.event import get, pump, Event, post
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from pygame.locals import *
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from GameChild import GameChild
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from Input import Input
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class Delegate(GameChild):
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def __init__(self, game):
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GameChild.__init__(self, game)
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self.subscribers = dict()
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self.load_configuration()
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self.disable()
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def load_configuration(self):
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config = self.get_configuration("event")
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self.cancel_flag_key = config["cancel-flag-key"]
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self.command_key = config["command-key"]
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self.command_event_id = config["command-id-offset"] + \
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globals()[config["user-event-id"]]
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def disable(self):
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self.enabled = False
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def enable(self):
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self.enabled = True
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self.interpolator = self.get_game().interpolator
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def dispatch(self):
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if self.enabled:
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subscribers = self.subscribers
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for evt in get():
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kind = evt.type
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if kind in subscribers:
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for subscriber in subscribers[kind]:
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if not self.interpolator.is_gui_active() or \
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hasattr(subscriber, "im_class") and \
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(subscriber.im_class == Input or \
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subscriber.im_class == \
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self.interpolator.gui.__class__):
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self.print_debug("Passing %s to %s" % (evt,
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subscriber))
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subscriber(evt)
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else:
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pump()
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def add_subscriber(self, callback, kind=None):
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self.print_debug("Subscribing %s to %s" % (callback, kind))
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if kind is None:
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kind = self.command_event_id
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subscribers = self.subscribers
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if kind not in subscribers:
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subscribers[kind] = list()
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subscribers[kind].append(callback)
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def is_command(self, event):
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return event.type == self.command_event_id
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def remove_subscriber(self, callback, kind=None):
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if kind is None:
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kind = self.command_event_id
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self.subscribers[kind].remove(callback)
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def compare(self, evt, commands=None, cancel=False, **attributes):
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if evt.type == self.command_event_id:
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self.add_cancel_flag_to_attributes(attributes, cancel)
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if commands is not None and not isinstance(commands, list):
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commands = [commands]
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if commands is not None:
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if not self.command_in_list(evt, commands):
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return False
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return all(key in evt.dict and evt.dict[key] == value for \
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key, value in attributes.iteritems())
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def add_cancel_flag_to_attributes(self, attributes, cancel):
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attributes[self.cancel_flag_key] = cancel
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def command_in_list(self, evt, commands):
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return self.get_command_attribute(evt) in commands
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def get_command_attribute(self, evt):
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return evt.dict[self.command_key]
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def post(self, command=None, cancel=False, **attributes):
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attributes[self.command_key] = command
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self.add_cancel_flag_to_attributes(attributes, cancel)
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post(Event(self.command_event_id, attributes))
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