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# @Base: Miro - an RSS based video player application
# Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011
# Participatory Culture Foundation
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# In addition, as a special exception, the copyright holders give
# permission to link the code of portions of this program with the OpenSSL
# library.
#
# You must obey the GNU General Public License in all respects for all of
# the code used other than OpenSSL. If you modify file(s) with this
# exception, you may extend this exception to your version of the file(s),
# but you are not obligated to do so. If you do not wish to do so, delete
# this exception statement from your version. If you delete this exception
# statement from all source files in the program, then also delete it here.
""".wrappermap -- Map GTK Widgets to the Libre Widget
that wraps them.
"""
import weakref
# Maps gtk windows -> wrapper objects. We use a weak references to prevent
# circular references between the GTK widget and it's wrapper. (Keeping a
# reference to the GTK widget is fine, since if the wrapper is alive, the GTK
# widget should be).
widget_mapping = weakref.WeakValueDictionary()
def wrapper(gtk_widget):
"""Find the wrapper widget for a GTK widget."""
try:
return widget_mapping[gtk_widget]
except KeyError:
raise KeyError("Widget wrapper no longer exists")
def add(gtk_widget, wrapper):
widget_mapping[gtk_widget] = wrapper
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