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Diffstat (limited to 'src/sugar3/graphics/objectchooser.py')
-rw-r--r-- | src/sugar3/graphics/objectchooser.py | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/sugar3/graphics/objectchooser.py b/src/sugar3/graphics/objectchooser.py new file mode 100644 index 0000000..af9142d --- /dev/null +++ b/src/sugar3/graphics/objectchooser.py @@ -0,0 +1,132 @@ +# 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() |