2 * Copyright © 2011 Canonical Limited
4 * This library 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, see <http://www.gnu.org/licenses/>.
17 * Authors: Ryan Lortie <desrt@desrt.ca>
22 #include "gactionobservable.h"
24 G_DEFINE_INTERFACE (GActionObservable, g_action_observable, G_TYPE_OBJECT)
27 * SECTION:gactionobserable
28 * @short_description: an interface implemented by objects that report
33 g_action_observable_default_init (GActionObservableInterface *iface)
38 * g_action_observable_register_observer:
39 * @observable: a #GActionObservable
40 * @action_name: the name of the action
41 * @observer: the #GActionObserver to which the events will be reported
43 * Registers @observer as being interested in changes to @action_name on
47 g_action_observable_register_observer (GActionObservable *observable,
48 const gchar *action_name,
49 GActionObserver *observer)
51 g_return_if_fail (G_IS_ACTION_OBSERVABLE (observable));
53 G_ACTION_OBSERVABLE_GET_IFACE (observable)
54 ->register_observer (observable, action_name, observer);
58 * g_action_observable_unregister_observer:
59 * @observable: a #GActionObservable
60 * @action_name: the name of the action
61 * @observer: the #GActionObserver to which the events will be reported
63 * Removes the registration of @observer as being interested in changes
64 * to @action_name on @observable.
66 * If the observer was registered multiple times, it must be
67 * unregistered an equal number of times.
70 g_action_observable_unregister_observer (GActionObservable *observable,
71 const gchar *action_name,
72 GActionObserver *observer)
74 g_return_if_fail (G_IS_ACTION_OBSERVABLE (observable));
76 G_ACTION_OBSERVABLE_GET_IFACE (observable)
77 ->unregister_observer (observable, action_name, observer);