1 <!-- ##### SECTION Title ##### -->
4 <!-- ##### SECTION Short_Description ##### -->
6 The base object class for the Accessibility Toolkit API.
8 <!-- ##### SECTION Long_Description ##### -->
10 This class is the primary class for accessibility support via
11 the Accessibility ToolKit (ATK). Objects which are instances
12 of #AtkObject (or instances of AtkObject-derived types) are
13 queried for properties which relate basic (and generic) properties of a
14 UI component such as name and description. Instances of #AtkObject
15 may also be queried as to whether they implement other ATK interfaces
16 (e.g. #AtkAction, #AtkComponent, etc.), as appropriate to the role
17 which a given UI component plays in a user interface.
19 <para>All UI components in an application which provide useful
20 information or services to the user must provide corresponding
21 #AtkObject instances on request (in GTK+, for instance, usually
22 on a call to #gtk_widget_get_accessible ()), either via ATK support
23 built into the toolkit for the widget class or ancestor class, or in
24 the case of custom widgets, if the inherited #AtkObject implementation
25 is insufficient, via instances of a new #AtkObject subclass.
28 <!-- ##### SECTION See_Also ##### -->
30 See also: #AtkObjectFactory, #AtkRegistry.
31 ( GTK+ users see also #GtkAccessible).
34 <!-- ##### STRUCT AtkObject ##### -->
36 The AtkObject structure should not be accessed directly.
41 <!-- ##### ENUM AtkRole ##### -->
43 These are the built-in enumerated roles that UI components can have in
44 ATK. Other roles may be added at runtime, so an AtkRole >=
45 ATK_ROLE_LAST_DEFINED is not necessarily an error.
49 @ATK_ROLE_ACCEL_LABEL:
56 @ATK_ROLE_CHECK_MENU_ITEM:
57 @ATK_ROLE_COLOR_CHOOSER:
58 @ATK_ROLE_COLUMN_HEADER:
60 @ATK_ROLE_DATE_EDITOR:
61 @ATK_ROLE_DESKTOP_ICON:
62 @ATK_ROLE_DESKTOP_FRAME:
65 @ATK_ROLE_DIRECTORY_PANE:
66 @ATK_ROLE_DRAWING_AREA:
67 @ATK_ROLE_FILE_CHOOSER:
69 @ATK_ROLE_FONT_CHOOSER:
72 @ATK_ROLE_HTML_CONTAINER:
75 @ATK_ROLE_INTERNAL_FRAME:
77 @ATK_ROLE_LAYERED_PANE:
83 @ATK_ROLE_OPTION_PANE:
85 @ATK_ROLE_PAGE_TAB_LIST:
87 @ATK_ROLE_PASSWORD_TEXT:
89 @ATK_ROLE_PROGRESS_BAR:
90 @ATK_ROLE_PUSH_BUTTON:
91 @ATK_ROLE_RADIO_BUTTON:
92 @ATK_ROLE_RADIO_MENU_ITEM:
96 @ATK_ROLE_SCROLL_PANE:
100 @ATK_ROLE_SPIN_BUTTON:
103 @ATK_ROLE_TABLE_CELL:
104 @ATK_ROLE_TABLE_COLUMN_HEADER:
105 @ATK_ROLE_TABLE_ROW_HEADER:
106 @ATK_ROLE_TEAR_OFF_MENU_ITEM:
109 @ATK_ROLE_TOGGLE_BUTTON:
113 @ATK_ROLE_TREE_TABLE:
117 @ATK_ROLE_LAST_DEFINED:
119 <!-- ##### FUNCTION atk_role_register ##### -->
128 <!-- ##### ENUM AtkLayer ##### -->
130 These enumerated "layer values" are used when determining which UI
131 rendering layer a component is drawn into, which can help in making
132 determinations of when components occlude one another.
136 @ATK_LAYER_BACKGROUND:
143 <!-- ##### STRUCT AtkImplementor ##### -->
145 The AtkImplementor structure does not contain any fields.
150 <!-- ##### STRUCT AtkPropertyValues ##### -->
152 The Atk PropertyValue structure is used when notifying a change in property.
153 Currently, the only property for which old_value is used is
154 accessible-state; for instance if there is a focus change the
155 property change handler will be called for the object which lost the focus
156 with the old_value containing the AtkState value corresponding to focused
157 and the property change handler will be called for the object which
158 received the focus with the new_value containing the AtkState value
159 corresponding to focused.
167 <!-- ##### USER_FUNCTION AtkFunction ##### -->
169 An AtkFunction is a function definition used for padding which has been added
170 to class and interface structures to allow for expansion in the future.
178 <!-- ##### USER_FUNCTION AtkPropertyChangeHandler ##### -->
180 An AtkPropertyChangeHandler is a function which is executed when an AtkObject's property changes value. It is specified in a call to
181 atk_object_connect_property_change_handler().
188 <!-- ##### FUNCTION atk_implementor_ref_accessible ##### -->
197 <!-- ##### FUNCTION atk_object_get_name ##### -->
206 <!-- ##### FUNCTION atk_object_get_description ##### -->
215 <!-- ##### FUNCTION atk_object_get_parent ##### -->
224 <!-- ##### FUNCTION atk_object_get_n_accessible_children ##### -->
233 <!-- ##### FUNCTION atk_object_ref_accessible_child ##### -->
243 <!-- ##### FUNCTION atk_object_ref_relation_set ##### -->
252 <!-- ##### FUNCTION atk_object_get_layer ##### -->
261 <!-- ##### FUNCTION atk_object_get_mdi_zorder ##### -->
270 <!-- ##### FUNCTION atk_object_get_role ##### -->
279 <!-- ##### FUNCTION atk_object_ref_state_set ##### -->
288 <!-- ##### FUNCTION atk_object_get_index_in_parent ##### -->
297 <!-- ##### FUNCTION atk_object_set_name ##### -->
306 <!-- ##### FUNCTION atk_object_set_description ##### -->
315 <!-- ##### FUNCTION atk_object_set_parent ##### -->
324 <!-- ##### FUNCTION atk_object_set_role ##### -->
333 <!-- ##### FUNCTION atk_object_connect_property_change_handler ##### -->
343 <!-- ##### FUNCTION atk_object_remove_property_change_handler ##### -->
352 <!-- ##### FUNCTION atk_object_notify_state_change ##### -->
362 <!-- ##### FUNCTION atk_object_initialize ##### -->
371 <!-- ##### FUNCTION atk_role_get_name ##### -->
380 <!-- ##### FUNCTION atk_role_for_name ##### -->
389 <!-- ##### SIGNAL AtkObject::children-changed ##### -->
391 The children_changed signal supports two details, "add" and "remove" which
392 indicate whether a child was added or removed
395 @atkobject: the object which received the signal.
396 @arg1: The index of the added or removed child
397 @arg2: The child which was added or removed
399 <!-- ##### SIGNAL AtkObject::focus-event ##### -->
404 @atkobject: the object which received the signal.
405 @arg1: A boolean value which indicates whether or not the focus event is is or out.
407 <!-- ##### SIGNAL AtkObject::property-change ##### -->
409 This signal support a detail which identifies the property which has
413 @atkobject: the object which received the signal.
414 @arg1: The new value of the property which changed.
416 <!-- ##### SIGNAL AtkObject::state-change ##### -->
418 This signal support, which may be any of the accessible state types.
421 @atkobject: the object which received the signal.
422 @arg1: The name of the state which has changed
423 @arg2: A boolean which indicates whether the state has been set or unset.
425 <!-- ##### SIGNAL AtkObject::visible-data-changed ##### -->
430 @atkobject: the object which received the signal.
432 <!-- ##### ARG AtkObject:accessible-name ##### -->
437 <!-- ##### ARG AtkObject:accessible-description ##### -->
442 <!-- ##### ARG AtkObject:accessible-parent ##### -->
447 <!-- ##### ARG AtkObject:accessible-value ##### -->
452 <!-- ##### ARG AtkObject:accessible-role ##### -->
457 <!-- ##### ARG AtkObject:accessible-component-layer ##### -->
462 <!-- ##### ARG AtkObject:accessible-component-mdi-zorder ##### -->
467 <!-- ##### ARG AtkObject:accessible-table-caption ##### -->
472 <!-- ##### ARG AtkObject:accessible-table-column-description ##### -->
477 <!-- ##### ARG AtkObject:accessible-table-column-header ##### -->
482 <!-- ##### ARG AtkObject:accessible-table-row-description ##### -->
487 <!-- ##### ARG AtkObject:accessible-table-row-header ##### -->
492 <!-- ##### ARG AtkObject:accessible-table-summary ##### -->