text: /*
   * AT-SPI - Assistive Technology Service Provider Interface
   * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
   *
   * Copyright 2002 Ximian, Inc.
   *           2002 Sun Microsystems Inc.
   * Copyright 2010, 2011 Novell, Inc.
   *           
   *
   * 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 2.1 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., 51 Franklin Street, Fifth Floor,
   * Boston, MA 02110-1301, USA.
   */
  
  #ifndef _ATSPI_EVENT_LISTENER_H_
  #define _ATSPI_EVENT_LISTENER_H_
  
  #include "glib-object.h"
  
  #include "atspi-types.h"
  
  G_BEGIN_DECLS
  
  GType atspi_event_get_type (void);
  
  /**
   * AtspiEventListenerCB:
   * @event: (transfer full): The event for which notification is sent.
   * @user_data: User data which is passed to the callback each time a notification takes place.
   *
   * A function prototype for callbacks via which clients are notified of AT-SPI events.
   * 
   **/
  typedef void       (*AtspiEventListenerCB)     (AtspiEvent     *event,
  						     void                      *user_data);
  
  /**
   * AtspiEventListenerSimpleCB:
   * @event: (transfer full): The event for which notification is sent.
   *
   * Like #AtspiEventlistenerCB, but with no user_data.
   * 
   **/
  typedef void       (*AtspiEventListenerSimpleCB)     (const AtspiEvent     *event);
  
  #define ATSPI_TYPE_EVENT_LISTENER                        (atspi_event_listener_get_type ())
  #define ATSPI_EVENT_LISTENER(obj)                        (G_TYPE_CHECK_INSTANCE_CAST ((obj), ATSPI_TYPE_EVENT_LISTENER, AtspiEventListener))
  #define ATSPI_EVENT_LISTENER_CLASS(klass)                (G_TYPE_CHECK_CLASS_CAST ((klass), ATSPI_TYPE_EVENT_LISTENER, AtspiEventListenerClass))
  #define ATSPI_IS_EVENT_LISTENER(obj)                     (G_TYPE_CHECK_INSTANCE_TYPE ((obj), ATSPI_TYPE_EVENT_LISTENER))
  #define ATSPI_IS_EVENT_LISTENER_CLASS(klass)             (G_TYPE_CHECK_CLASS_TYPE ((klass), ATSPI_TYPE_EVENT_LISTENER))
  #define ATSPI_EVENT_LISTENER_GET_CLASS(obj)              (G_TYPE_INSTANCE_GET_CLASS ((obj), ATSPI_TYPE_EVENT_LISTENER, AtspiEventListenerClass))
  
  typedef struct _AtspiEventListener AtspiEventListener;
  struct _AtspiEventListener
  {
    GObject parent;
    AtspiEventListenerCB callback;
    void *user_data;
    GDestroyNotify cb_destroyed;
  };
  
  typedef struct _AtspiEventListenerClass AtspiEventListenerClass;
  struct _AtspiEventListenerClass
  {
    GObjectClass parent_class;
  };
  
  GType atspi_event_listener_get_type (void);
  
  AtspiEventListener *
  atspi_event_listener_new (AtspiEventListenerCB callback,
                                   gpointer user_data,
                                   GDestroyNotify callback_destroyed);
  
  AtspiEventListener *
  atspi_event_listener_new_simple (AtspiEventListenerSimpleCB callback,
                                   GDestroyNotify callback_destroyed);
  
  gboolean
  atspi_event_listener_register (AtspiEventListener *listener,
  				 const gchar              *event_type,
  				 GError **error);
  
  gboolean
  atspi_event_listener_register_full (AtspiEventListener *listener,
  				      const gchar              *event_type,
                                        GArray *properties,
  				      GError **error);
  
  gboolean
  atspi_event_listener_register_from_callback (AtspiEventListenerCB callback,
  				             void *user_data,
  				             GDestroyNotify callback_destroyed,
  				             const gchar              *event_type,
  				             GError **error);
  
  gboolean
  atspi_event_listener_register_from_callback_full (AtspiEventListenerCB callback,
  				                  void *user_data,
  				                  GDestroyNotify callback_destroyed,
  				                  const gchar              *event_type,
                                                    GArray *properties,
  				                  GError **error);
  
  gboolean
  atspi_event_listener_register_no_data (AtspiEventListenerSimpleCB callback,
  				 GDestroyNotify callback_destroyed,
  				 const gchar              *event_type,
  				 GError **error);
  
  gboolean
  atspi_event_listener_deregister (AtspiEventListener *listener,
  				 const gchar              *event_type,
  				 GError **error);
  
  gboolean
  atspi_event_listener_deregister_from_callback (AtspiEventListenerCB callback,
  				               void *user_data,
  				               const gchar              *event_type,
  				               GError **error);
  
  gboolean
  atspi_event_listener_deregister_no_data (AtspiEventListenerSimpleCB callback,
  				   const gchar              *event_type,
  				   GError **error);
  
  G_END_DECLS
  
  #endif	/* _ATSPI_EVENT_LISTENER_H_ */
  