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| -rw-r--r-- | other-licenses/atk-1.0/atk/atkutil.h | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/other-licenses/atk-1.0/atk/atkutil.h b/other-licenses/atk-1.0/atk/atkutil.h new file mode 100644 index 0000000000..728a10685d --- /dev/null +++ b/other-licenses/atk-1.0/atk/atkutil.h @@ -0,0 +1,245 @@ +/* ATK - Accessibility Toolkit + * Copyright 2001 Sun Microsystems Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#ifndef __ATK_UTIL_H__ +#define __ATK_UTIL_H__ + +#include <atk/atkobject.h> + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +#define ATK_TYPE_UTIL (atk_util_get_type ()) +#define ATK_IS_UTIL(obj) G_TYPE_CHECK_INSTANCE_TYPE ((obj), ATK_TYPE_UTIL) +#define ATK_UTIL(obj) G_TYPE_CHECK_INSTANCE_CAST ((obj), ATK_TYPE_UTIL, AtkUtil) +#define ATK_UTIL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), ATK_TYPE_UTIL, AtkUtilClass)) +#define ATK_IS_UTIL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), ATK_TYPE_UTIL)) +#define ATK_UTIL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), ATK_TYPE_UTIL, AtkUtilClass)) + + +#ifndef _TYPEDEF_ATK_UTIL_ +#define _TYPEDEF_ATK_UTIL_ +typedef struct _AtkUtil AtkUtil; +typedef struct _AtkUtilClass AtkUtilClass; +typedef struct _AtkKeyEventStruct AtkKeyEventStruct; +#endif + +/** + * AtkEventListener: + * @obj: An #AtkObject instance for whom the callback will be called when + * the specified event (e.g. 'focus:') takes place. + * + * A function which is called when an object emits a matching event, + * as used in #atk_add_focus_tracker. + * Currently the only events for which object-specific handlers are + * supported are events of type "focus:". Most clients of ATK will prefer to + * attach signal handlers for the various ATK signals instead. + * + * @see: atk_add_focus_tracker. + **/ +typedef void (*AtkEventListener) (AtkObject* obj); +/** + * AtkEventListenerInit: + * + * An #AtkEventListenerInit function is a special function that is + * called in order to initialize the per-object event registration system + * used by #AtkEventListener, if any preparation is required. + * + * @see: atk_focus_tracker_init. + **/ +typedef void (*AtkEventListenerInit) (void); +/** + * AtkKeySnoopFunc: + * @event: an AtkKeyEventStruct containing information about the key event for which + * notification is being given. + * @func_data: a block of data which will be passed to the event listener, on notification. + * + * An #AtkKeySnoopFunc is a type of callback which is called whenever a key event occurs, + * if registered via atk_add_key_event_listener. It allows for pre-emptive + * interception of key events via the return code as described below. + * + * Returns: TRUE (nonzero) if the event emission should be stopped and the event + * discarded without being passed to the normal GUI recipient; FALSE (zero) if the + * event dispatch to the client application should proceed as normal. + * + * @see: atk_add_key_event_listener. + **/ +typedef gint (*AtkKeySnoopFunc) (AtkKeyEventStruct *event, + gpointer func_data); + +/** + * AtkKeyEventStruct: + * @type: An AtkKeyEventType, generally one of ATK_KEY_EVENT_PRESS or ATK_KEY_EVENT_RELEASE + * @state: A bitmask representing the state of the modifier keys immediately after the event takes place. + * The meaning of the bits is currently defined to match the bitmask used by GDK in + * GdkEventType.state, see + * http://developer.gnome.org/doc/API/2.0/gdk/gdk-Event-Structures.html#GdkEventKey + * @keyval: A guint representing a keysym value corresponding to those used by GDK and X11: see + * /usr/X11/include/keysymdef.h. + * @length: The length of member #string. + * @string: A string containing one of the following: either a string approximating the text that would + * result from this keypress, if the key is a control or graphic character, or a symbolic name for this keypress. + * Alphanumeric and printable keys will have the symbolic key name in this string member, for instance "A". "0", + * "semicolon", "aacute". Keypad keys have the prefix "KP". + * @keycode: The raw hardware code that generated the key event. This field is raraly useful. + * @timestamp: A timestamp in milliseconds indicating when the event occurred. + * These timestamps are relative to a starting point which should be considered arbitrary, + * and only used to compare the dispatch times of events to one another. + * + * Encapsulates information about a key event. + **/ +struct _AtkKeyEventStruct { + gint type; + guint state; + guint keyval; + gint length; + gchar *string; + guint16 keycode; + guint32 timestamp; +}; + +/** + *AtkKeyEventType: + *@ATK_KEY_EVENT_PRESS: specifies a key press event + *@ATK_KEY_EVENT_RELEASE: specifies a key release event + *@ATK_KEY_EVENT_LAST_DEFINED: Not a valid value; specifies end of enumeration + * + *Specifies the type of a keyboard evemt. + **/ +typedef enum +{ + ATK_KEY_EVENT_PRESS, + ATK_KEY_EVENT_RELEASE, + ATK_KEY_EVENT_LAST_DEFINED +} AtkKeyEventType; + +struct _AtkUtil +{ + GObject parent; +}; + +struct _AtkUtilClass +{ + GObjectClass parent; + guint (* add_global_event_listener) (GSignalEmissionHook listener, + const gchar *event_type); + void (* remove_global_event_listener) (guint listener_id); + guint (* add_key_event_listener) (AtkKeySnoopFunc listener, + gpointer data); + void (* remove_key_event_listener) (guint listener_id); + AtkObject* (* get_root) (void); + G_CONST_RETURN gchar* (* get_toolkit_name) (void); + G_CONST_RETURN gchar* (* get_toolkit_version) (void); +}; +GType atk_util_get_type (void); + +/** + *AtkCoordType: + *@ATK_XY_SCREEN: specifies xy coordinates relative to the screen + *@ATK_XY_WINDOW: specifies xy coordinates relative to the widget's + * top-level window + *@ATK_XY_PARENT: specifies xy coordinates relative to the widget's + * immediate parent. + * + *Specifies how xy coordinates are to be interpreted. Used by functions such + *as atk_component_get_position() and atk_text_get_character_extents() + **/ +typedef enum { + ATK_XY_SCREEN, + ATK_XY_WINDOW, + ATK_XY_PARENT +}AtkCoordType; + +/* + * Adds the specified function to the list of functions to be called + * when an object receives focus. + */ +guint atk_add_focus_tracker (AtkEventListener focus_tracker); + +/* + * Removes the specified focus tracker from the list of function + * to be called when any object receives focus + */ +void atk_remove_focus_tracker (guint tracker_id); + +/* + * atk_focus_tracker_init: + * @init: An #AtkEventListenerInit function to be called + * prior to any focus-tracking requests. + * + * Specifies the function to be called for focus tracker initialization. + * removal. This function should be called by an implementation of the + * ATK interface if any specific work needs to be done to enable + * focus tracking. + */ +void atk_focus_tracker_init (AtkEventListenerInit init); + +/* + * Cause the focus tracker functions which have been specified to be + * executed for the object. + */ +void atk_focus_tracker_notify (AtkObject *object); + +/* + * Adds the specified function to the list of functions to be called + * when an event of type event_type occurs. + */ +guint atk_add_global_event_listener (GSignalEmissionHook listener, + const gchar *event_type); + +/* + * Removes the specified event listener + */ +void atk_remove_global_event_listener (guint listener_id); + +/* + * Adds the specified function to the list of functions to be called + * when an keyboard event occurs. + */ +guint atk_add_key_event_listener (AtkKeySnoopFunc listener, gpointer data); + +/* + * Removes the specified event listener + */ +void atk_remove_key_event_listener (guint listener_id); + +/* + * Returns the root accessible container for the current application. + */ +AtkObject* atk_get_root(void); + +AtkObject* atk_get_focus_object (void); + +/* + * Returns name string for the GUI toolkit. + */ +G_CONST_RETURN gchar *atk_get_toolkit_name (void); + +/* + * Returns version string for the GUI toolkit. + */ +G_CONST_RETURN gchar *atk_get_toolkit_version (void); + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + + +#endif /* __ATK_UTIL_H__ */ |