helper.py

########################################################################
#                                                                      #
# This file is part of openPSTD.                                       #
#                                                                      #
# openPSTD is free software: you can redistribute it and/or modify     #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or    #
# (at your option) any later version.                                  #
#                                                                      #
# openPSTD is distributed in the hope that it will be useful,          #
# but WITHOUT ANY WARRANTY; without even the implied warranty of       #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        #
# GNU General Public License for more details.                         #
#                                                                      #
# You should have received a copy of the GNU General Public License    #
# along with openPSTD.  If not, see <http://www.gnu.org/licenses/>.    #
#                                                                      #
########################################################################

__author__ = 'michiel'

from PySide import QtCore

class InvokeEvent(QtCore.QEvent):
    EVENT_TYPE = QtCore.QEvent.Type(QtCore.QEvent.registerEventType())

    def __init__(self, fn, *args):
        QtCore.QEvent.__init__(self, InvokeEvent.EVENT_TYPE)
        self.fn = fn
        self.args = args

class Invoker(QtCore.QObject):
    def event(self, event):
        event.fn(*event.args)
        return True

_invoker = Invoker()

def CallObservers(observers, *args):
    for f in observers:
        f(*args)

def CallObserversQT(observers, *args):
    for f in observers:
        QtCore.QCoreApplication.postEvent(_invoker, InvokeEvent(f, *args))