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# Copyright (C) 2007, One Laptop Per Child
#
# 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 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.
"""
STABLE.
"""
import logging
import gobject
import gtk
import dbus
from sugar.datastore import datastore
J_DBUS_SERVICE = 'org.laptop.Journal'
J_DBUS_INTERFACE = 'org.laptop.Journal'
J_DBUS_PATH = '/org/laptop/Journal'
class ObjectChooser(object):
def __init__(self, title=None, parent=None, flags=None, buttons=None,
what_filter=None):
# For backwards compatibility:
# - We ignore title, flags and buttons.
# - 'parent' can be a xid or a gtk.Window
if title is not None or flags is not None or buttons is not None:
logging.warning('Invocation of ObjectChooser() has deprecated '
'parameters.')
if parent is None:
parent_xid = 0
elif hasattr(parent, 'window') and hasattr(parent.window, 'xid'):
parent_xid = parent.window.xid
else:
parent_xid = parent
self._parent_xid = parent_xid
self._main_loop = None
self._object_id = None
self._bus = None
self._chooser_id = None
self._response_code = gtk.RESPONSE_NONE
self._what_filter = what_filter
def run(self):
self._object_id = None
self._main_loop = gobject.MainLoop()
self._bus = dbus.SessionBus(mainloop=self._main_loop)
self._bus.add_signal_receiver(
self.__name_owner_changed_cb,
signal_name="NameOwnerChanged",
dbus_interface="org.freedesktop.DBus",
arg0=J_DBUS_SERVICE)
obj = self._bus.get_object(J_DBUS_SERVICE, J_DBUS_PATH)
journal = dbus.Interface(obj, J_DBUS_INTERFACE)
journal.connect_to_signal('ObjectChooserResponse',
self.__chooser_response_cb)
journal.connect_to_signal('ObjectChooserCancelled',
self.__chooser_cancelled_cb)
if self._what_filter is None:
what_filter = ''
else:
what_filter = self._what_filter
self._chooser_id = journal.ChooseObject(self._parent_xid, what_filter)
gtk.gdk.threads_leave()
try:
self._main_loop.run()
finally:
gtk.gdk.threads_enter()
self._main_loop = None
return self._response_code
def get_selected_object(self):
if self._object_id is None:
return None
else:
return datastore.get(self._object_id)
def destroy(self):
self._cleanup()
def _cleanup(self):
if self._main_loop is not None:
self._main_loop.quit()
self._main_loop = None
self._bus = None
def __chooser_response_cb(self, chooser_id, object_id):
if chooser_id != self._chooser_id:
return
logging.debug('ObjectChooser.__chooser_response_cb: %r', object_id)
self._response_code = gtk.RESPONSE_ACCEPT
self._object_id = object_id
self._cleanup()
def __chooser_cancelled_cb(self, chooser_id):
if chooser_id != self._chooser_id:
return
logging.debug('ObjectChooser.__chooser_cancelled_cb: %r', chooser_id)
self._response_code = gtk.RESPONSE_CANCEL
self._cleanup()
def __name_owner_changed_cb(self, name, old, new):
logging.debug('ObjectChooser.__name_owner_changed_cb')
# Journal service disappeared from the bus
self._response_code = gtk.RESPONSE_CANCEL
self._cleanup()
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