2 * AT-SPI - Assistive Technology Service Provider Interface
3 * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
5 * Copyright 2002 Ximian, Inc.
6 * 2002 Sun Microsystems Inc.
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
19 * You should have received a copy of the GNU Library General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 02111-1307, USA.
25 #ifndef _ATSPI_DEVICE_LISTENER_H_
26 #define _ATSPI_DEVICE_LISTENER_H_
28 #include "glib-object.h"
30 #include "atspi-types.h"
33 * AtspiDeviceListenerCB:
34 * @stroke: (transfer full): The #AtspiDeviceEvent for which notification is
36 * @user_data: Data which is passed to the client each time this callback is notified.
38 * A callback function prototype via which clients receive device event notifications.
40 * Returns: %TRUE if the client wishes to consume/preempt the event, preventing it from being
41 * relayed to the currently focussed application, %FALSE if the event delivery should proceed as normal.
43 typedef gboolean (*AtspiDeviceListenerCB) (const AtspiDeviceEvent *stroke,
47 * AtspiDeviceListenerSimpleCB:
48 * @stroke: (transfer full): The #AtspiDeviceEvent for which notification is
51 * Like #AtspiDeviceListenerCB but with no user data.
53 * Returns: %TRUE if the client wishes to consume/preempt the event, preventing it from being
54 * relayed to the currently focussed application, %FALSE if the event delivery should proceed as normal.
56 typedef gboolean (*AtspiDeviceListenerSimpleCB) (const AtspiDeviceEvent *stroke);
58 #define ATSPI_TYPE_DEVICE_LISTENER (atspi_device_listener_get_type ())
59 #define ATSPI_DEVICE_LISTENER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), ATSPI_TYPE_DEVICE_LISTENER, AtspiDeviceListener))
60 #define ATSPI_DEVICE_LISTENER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), ATSPI_TYPE_DEVICE_LISTENER, AtspiDeviceListenerClass))
61 #define ATSPI_IS_DEVICE_LISTENER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), ATSPI_TYPE_DEVICE_LISTENER))
62 #define ATSPI_IS_DEVICE_LISTENER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), ATSPI_TYPE_DEVICE_LISTENER))
63 #define ATSPI_DEVICE_LISTENER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), ATSPI_TYPE_DEVICE_LISTENER, AtspiDeviceListenerClass))
65 typedef struct _AtspiDeviceListener AtspiDeviceListener;
66 struct _AtspiDeviceListener
73 typedef struct _AtspiDeviceListenerClass AtspiDeviceListenerClass;
74 struct _AtspiDeviceListenerClass
76 GObjectClass parent_class;
77 gboolean (*device_event) (AtspiDeviceListener *, const AtspiDeviceEvent *);
80 GType atspi_device_listener_get_type (void);
82 AtspiDeviceListener *atspi_device_listener_new (AtspiDeviceListenerCB callback, GDestroyNotify callback_destroyed, void *user_data);
84 AtspiDeviceListener *atspi_device_listener_new_simple (AtspiDeviceListenerSimpleCB callback, GDestroyNotify callback_destroyed);
86 void atspi_device_listener_add_callback (AtspiDeviceListener *listener, AtspiDeviceListenerCB callback, GDestroyNotify callback_destroyed, void *user_data);
88 void atspi_device_listener_remove_callback (AtspiDeviceListener *listener, AtspiDeviceListenerCB callback);
89 #endif /* _ATSPI_DEVICE_LISTENER_H_ */