Source code for egegrouper.simple_signal
# EGEGrouper - Software for grouping electrogastroenterography examinations.
# Copyright (C) 2017-2018 Aleksandr Popov
# This program 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.
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
""" This module implements the SimpleSignal class which makes the
event handling more convenient. """
[docs]class SimpleSignal:
"""Provides simple signals and slots mechanism."""
def __init__(self):
"""Constructor.
Create empty list of connected function.
"""
self.slots = []
[docs] def emit(self, *args):
"""Emit signal."""
for s in self.slots:
if s:
s(args)
[docs] def connect(self, slot):
"""Connect signal with slot.
Parameters
----------
slot
Function to be connected with signal.
"""
for i in range(len(self.slots)):
if self.slots[i] == slot:
return
if self.slots[i] == None:
self.slots[i] = slot
return
self.slots.append(slot)
[docs] def disconnect(self, slot):
"""Disconnect slot from signal.
Parameters
----------
slot
Name of connected function.
"""
for i in range(len(self.slots)):
if self.slots[i] == slot:
self.slots[i] = None