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# -*- coding: utf-8 -*-
#
# signals.py
#
# Copyright (C) 2009 - Jesse van den Kieboom
#
# 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 2 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/>.
class Signals:
def __init__(self):
self._signals = {}
def _connect(self, obj, name, handler, connector):
ret = self._signals.setdefault(obj, {})
hid = connector(name, handler)
ret.setdefault(name, []).append(hid)
return hid
def connect_signal(self, obj, name, handler):
return self._connect(obj, name, handler, obj.connect)
def connect_signal_after(self, obj, name, handler):
return self._connect(obj, name, handler, obj.connect_after)
def disconnect_signals(self, obj):
if obj not in self._signals:
return False
for name in self._signals[obj]:
for hid in self._signals[obj][name]:
obj.disconnect(hid)
del self._signals[obj]
return True
def block_signal(self, obj, name):
if obj not in self._signals:
return False
if name not in self._signals[obj]:
return False
for hid in self._signals[obj][name]:
obj.handler_block(hid)
return True
def unblock_signal(self, obj, name):
if obj not in self._signals:
return False
if name not in self._signals[obj]:
return False
for hid in self._signals[obj][name]:
obj.handler_unblock(hid)
return True
def disconnect_signal(self, obj, name):
if obj not in self._signals:
return False
if name not in self._signals[obj]:
return False
for hid in self._signals[obj][name]:
obj.disconnect(hid)
del self._signals[obj][name]
if len(self._signals[obj]) == 0:
del self._signals[obj]
return True
# ex:ts=4:et:
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