2 * Copyright © 2011 Canonical Limited
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * licence or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
19 * Authors: Ryan Lortie <desrt@desrt.ca>
24 #include "gactionobservable.h"
26 G_DEFINE_INTERFACE (GActionObservable, g_action_observable, G_TYPE_OBJECT)
29 * SECTION:gactionobserable
30 * @short_description: an interface implemented by objects that report
37 g_action_observable_default_init (GActionObservableInterface *iface)
42 * g_action_observable_register_observer:
43 * @observable: a #GActionObservable
44 * @action_name: the name of the action
45 * @observer: the #GActionObserver to which the events will be reported
47 * Registers @observer as being interested in changes to @action_name on
53 g_action_observable_register_observer (GActionObservable *observable,
54 const gchar *action_name,
55 GActionObserver *observer)
57 g_return_if_fail (G_IS_ACTION_OBSERVABLE (observable));
59 G_ACTION_OBSERVABLE_GET_IFACE (observable)
60 ->register_observer (observable, action_name, observer);
64 * g_action_observable_unregister_observer:
65 * @observable: a #GActionObservable
66 * @action_name: the name of the action
67 * @observer: the #GActionObserver to which the events will be reported
69 * Removes the registration of @observer as being interested in changes
70 * to @action_name on @observable.
72 * If the observer was registered multiple times, it must be
73 * unregistered an equal number of times.
78 g_action_observable_unregister_observer (GActionObservable *observable,
79 const gchar *action_name,
80 GActionObserver *observer)
82 g_return_if_fail (G_IS_ACTION_OBSERVABLE (observable));
84 G_ACTION_OBSERVABLE_GET_IFACE (observable)
85 ->unregister_observer (observable, action_name, observer);