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:
144 <!-- ##### STRUCT AtkImplementor ##### -->
146 The AtkImplementor structure does not contain any fields.
151 <!-- ##### STRUCT AtkPropertyValues ##### -->
153 The Atk PropertyValue structure is used when notifying a change in property.
154 Currently, the only property for which old_value is used is
155 accessible-state; for instance if there is a focus change the
156 property change handler will be called for the object which lost the focus
157 with the old_value containing the AtkState value corresponding to focused
158 and the property change handler will be called for the object which
159 received the focus with the new_value containing the AtkState value
160 corresponding to focused.
168 <!-- ##### USER_FUNCTION AtkFunction ##### -->
170 An AtkFunction is a function definition used for padding which has been added
171 to class and interface structures to allow for expansion in the future.
179 <!-- ##### USER_FUNCTION AtkPropertyChangeHandler ##### -->
181 An AtkPropertyChangeHandler is a function which is executed when an AtkObject's property changes value. It is specified in a call to
182 atk_object_connect_property_change_handler().
189 <!-- ##### FUNCTION atk_implementor_ref_accessible ##### -->
198 <!-- ##### FUNCTION atk_object_get_name ##### -->
207 <!-- ##### FUNCTION atk_object_get_description ##### -->
216 <!-- ##### FUNCTION atk_object_get_parent ##### -->
225 <!-- ##### FUNCTION atk_object_get_n_accessible_children ##### -->
234 <!-- ##### FUNCTION atk_object_ref_accessible_child ##### -->
244 <!-- ##### FUNCTION atk_object_ref_relation_set ##### -->
253 <!-- ##### FUNCTION atk_object_get_layer ##### -->
262 <!-- ##### FUNCTION atk_object_get_mdi_zorder ##### -->
271 <!-- ##### FUNCTION atk_object_get_role ##### -->
280 <!-- ##### FUNCTION atk_object_ref_state_set ##### -->
289 <!-- ##### FUNCTION atk_object_get_index_in_parent ##### -->
298 <!-- ##### FUNCTION atk_object_set_name ##### -->
307 <!-- ##### FUNCTION atk_object_set_description ##### -->
316 <!-- ##### FUNCTION atk_object_set_parent ##### -->
325 <!-- ##### FUNCTION atk_object_set_role ##### -->
334 <!-- ##### FUNCTION atk_object_connect_property_change_handler ##### -->
344 <!-- ##### FUNCTION atk_object_remove_property_change_handler ##### -->
353 <!-- ##### FUNCTION atk_object_notify_state_change ##### -->
363 <!-- ##### FUNCTION atk_object_initialize ##### -->
372 <!-- ##### FUNCTION atk_role_get_name ##### -->
381 <!-- ##### FUNCTION atk_role_for_name ##### -->
390 <!-- ##### SIGNAL AtkObject::children-changed ##### -->
392 The children_changed signal supports two details, "add" and "remove" which
393 indicate whether a child was added or removed
396 @atkobject: the object which received the signal.
397 @arg1: The index of the added or removed child
398 @arg2: The child which was added or removed
400 <!-- ##### SIGNAL AtkObject::focus-event ##### -->
405 @atkobject: the object which received the signal.
406 @arg1: A boolean value which indicates whether or not the focus event is is or out.
408 <!-- ##### SIGNAL AtkObject::property-change ##### -->
410 This signal support a detail which identifies the property which has
414 @atkobject: the object which received the signal.
415 @arg1: The new value of the property which changed.
417 <!-- ##### SIGNAL AtkObject::state-change ##### -->
419 This signal support, which may be any of the accessible state types.
422 @atkobject: the object which received the signal.
423 @arg1: The name of the state which has changed
424 @arg2: A boolean which indicates whether the state has been set or unset.
426 <!-- ##### SIGNAL AtkObject::visible-data-changed ##### -->
431 @atkobject: the object which received the signal.
433 <!-- ##### ARG AtkObject:accessible-name ##### -->
438 <!-- ##### ARG AtkObject:accessible-description ##### -->
443 <!-- ##### ARG AtkObject:accessible-parent ##### -->
448 <!-- ##### ARG AtkObject:accessible-value ##### -->
453 <!-- ##### ARG AtkObject:accessible-role ##### -->
458 <!-- ##### ARG AtkObject:accessible-component-layer ##### -->
463 <!-- ##### ARG AtkObject:accessible-component-mdi-zorder ##### -->
468 <!-- ##### ARG AtkObject:accessible-table-caption ##### -->
473 <!-- ##### ARG AtkObject:accessible-table-column-description ##### -->
478 <!-- ##### ARG AtkObject:accessible-table-column-header ##### -->
483 <!-- ##### ARG AtkObject:accessible-table-row-description ##### -->
488 <!-- ##### ARG AtkObject:accessible-table-row-header ##### -->
493 <!-- ##### ARG AtkObject:accessible-table-summary ##### -->