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# -*- Mode: Python; py-indent-offset: 4 -*-
# pygobject - Python bindings for the GObject library
# Copyright (C) 2006 Johan Dahlin
#
# gobject/__init__.py: initialisation file for gobject module
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA
# this can go when things are a little further along
try:
import ltihooks
ltihooks # pyflakes
del ltihooks
except ImportError:
pass
from gobject.constants import *
from _gobject import *
_PyGObject_API = _gobject._PyGObject_API
from propertyhelper import property
class GObjectMeta(type):
"Metaclass for automatically registering GObject classes"
def __init__(cls, name, bases, dict_):
type.__init__(cls, name, bases, dict_)
cls._install_properties()
cls._type_register(cls.__dict__)
def _install_properties(cls):
gproperties = getattr(cls, '__gproperties__', {})
props = []
for name, prop in cls.__dict__.items():
if isinstance(prop, property): # not same as the built-in
if name in gproperties:
raise ValueError
prop.name = name
gproperties[name] = prop.get_pspec_args()
props.append(prop)
if not props:
return
cls.__gproperties__ = gproperties
if ('do_get_property' in cls.__dict__ or
'do_set_property' in cls.__dict__):
for prop in props:
if (prop.getter != prop._default_getter or
prop.setter != prop._default_setter):
raise TypeError(
"GObject subclass %r defines do_get/set_property"
" and it also uses a property which a custom setter"
" or getter. This is not allowed" % (
cls.__name__,))
def obj_get_property(self, pspec):
name = pspec.name.replace('-', '_')
prop = getattr(cls, name, None)
if prop:
return prop.getter(self)
cls.do_get_property = obj_get_property
def obj_set_property(self, pspec, value):
name = pspec.name.replace('-', '_')
prop = getattr(cls, name, None)
if prop:
prop.setter(self, value)
cls.do_set_property = obj_set_property
def _type_register(cls, namespace):
## don't register the class if already registered
if '__gtype__' in namespace:
return
if not ('__gproperties__' in namespace or
'__gsignals__' in namespace or
'__gtype_name__' in namespace):
return
type_register(cls, namespace.get('__gtype_name__'))
_gobject._install_metaclass(GObjectMeta)
del _gobject
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