1/*
2 * Copyright © 2011 Canonical Limited
3 *
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.
8 *
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.
13 *
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/>.
16 *
17 * Authors: Ryan Lortie <desrt@desrt.ca>
18 */
19
20#include "config.h"
21
22#include "gtkactionobservableprivate.h"
23
24G_DEFINE_INTERFACE (GtkActionObservable, gtk_action_observable, G_TYPE_OBJECT)
25
26void
27gtk_action_observable_default_init (GtkActionObservableInterface *iface)
28{
29}
30
31/**
32 * gtk_action_observable_register_observer:
33 * @observable: a `GtkActionObservable`
34 * @action_name: the name of the action
35 * @observer: the `GtkActionObserver` to which the events will be reported
36 *
37 * Registers @observer as being interested in changes to @action_name on
38 * @observable.
39 */
40void
41gtk_action_observable_register_observer (GtkActionObservable *observable,
42 const char *action_name,
43 GtkActionObserver *observer)
44{
45 g_return_if_fail (GTK_IS_ACTION_OBSERVABLE (observable));
46
47 GTK_ACTION_OBSERVABLE_GET_IFACE (observable)
48 ->register_observer (observable, action_name, observer);
49}
50
51/**
52 * gtk_action_observable_unregister_observer:
53 * @observable: a `GtkActionObservable`
54 * @action_name: the name of the action
55 * @observer: the `GtkActionObserver` to which the events will be reported
56 *
57 * Removes the registration of @observer as being interested in changes
58 * to @action_name on @observable.
59 *
60 * If the observer was registered multiple times, it must be
61 * unregistered an equal number of times.
62 */
63void
64gtk_action_observable_unregister_observer (GtkActionObservable *observable,
65 const char *action_name,
66 GtkActionObserver *observer)
67{
68 g_return_if_fail (GTK_IS_ACTION_OBSERVABLE (observable));
69
70 GTK_ACTION_OBSERVABLE_GET_IFACE (observable)
71 ->unregister_observer (observable, action_name, observer);
72}
73

source code of gtk/gtk/gtkactionobservable.c