path: root/atk/atkobject.h

/* 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.
 */

#if defined(ATK_DISABLE_SINGLE_INCLUDES) && !defined (__ATK_H_INSIDE__) && !defined (ATK_COMPILATION)
#error "Only <atk/atk.h> can be included directly."
#endif

#ifndef __ATK_OBJECT_H__
#define __ATK_OBJECT_H__

#include <glib-object.h>

#include <atk/atkversion.h>
#include <atk/atkstate.h>
#include <atk/atkrelationtype.h>

G_BEGIN_DECLS

/*
 * AtkObject represents the minimum information all accessible objects
 * return. This information includes accessible name, accessible
 * description, role and state of the object, as well information about
 * its parent and children. It is also possible to obtain more specific
 * accessibility information about a component if it supports one or more
 * of the following interfaces:
 */


/**
 *AtkRole:
 *@ATK_ROLE_INVALID: Invalid role
 *@ATK_ROLE_ACCEL_LABEL: A label which represents an accelerator
 *@ATK_ROLE_ALERT: An object which is an alert to the user. Assistive Technologies typically respond to ATK_ROLE_ALERT by reading the entire onscreen contents of containers advertising this role.  Should be used for warning dialogs, etc.
 *@ATK_ROLE_ANIMATION: An object which is an animated image
 *@ATK_ROLE_ARROW: An arrow in one of the four cardinal directions
 *@ATK_ROLE_CALENDAR:  An object that displays a calendar and allows the user to select a date
 *@ATK_ROLE_CANVAS: An object that can be drawn into and is used to trap events
 *@ATK_ROLE_CHECK_BOX: A choice that can be checked or unchecked and provides a separate indicator for the current state
 *@ATK_ROLE_CHECK_MENU_ITEM: A menu item with a check box
 *@ATK_ROLE_COLOR_CHOOSER: A specialized dialog that lets the user choose a color
 *@ATK_ROLE_COLUMN_HEADER: The header for a column of data
 *@ATK_ROLE_COMBO_BOX: A collapsible list of choices the user can select from
 *@ATK_ROLE_DATE_EDITOR: An object whose purpose is to allow a user to edit a date
 *@ATK_ROLE_DESKTOP_ICON: An inconifed internal frame within a DESKTOP_PANE
 *@ATK_ROLE_DESKTOP_FRAME: A pane that supports internal frames and iconified versions of those internal frames
 *@ATK_ROLE_DIAL: An object whose purpose is to allow a user to set a value
 *@ATK_ROLE_DIALOG: A top level window with title bar and a border
 *@ATK_ROLE_DIRECTORY_PANE: A pane that allows the user to navigate through and select the contents of a directory
 *@ATK_ROLE_DRAWING_AREA: An object used for drawing custom user interface elements
 *@ATK_ROLE_FILE_CHOOSER: A specialized dialog that lets the user choose a file
 *@ATK_ROLE_FILLER: A object that fills up space in a user interface
 *@ATK_ROLE_FONT_CHOOSER: A specialized dialog that lets the user choose a font
 *@ATK_ROLE_FRAME: A top level window with a title bar, border, menubar, etc.
 *@ATK_ROLE_GLASS_PANE: A pane that is guaranteed to be painted on top of all panes beneath it
 *@ATK_ROLE_HTML_CONTAINER: A document container for HTML, whose children represent the document content
 *@ATK_ROLE_ICON: A small fixed size picture, typically used to decorate components
 *@ATK_ROLE_IMAGE: An object whose primary purpose is to display an image
 *@ATK_ROLE_INTERNAL_FRAME: A frame-like object that is clipped by a desktop pane
 *@ATK_ROLE_LABEL: An object used to present an icon or short string in an interface
 *@ATK_ROLE_LAYERED_PANE: A specialized pane that allows its children to be drawn in layers, providing a form of stacking order
 *@ATK_ROLE_LIST: An object that presents a list of objects to the user and allows the user to select one or more of them 
 *@ATK_ROLE_LIST_ITEM: An object that represents an element of a list 
 *@ATK_ROLE_MENU: An object usually found inside a menu bar that contains a list of actions the user can choose from
 *@ATK_ROLE_MENU_BAR: An object usually drawn at the top of the primary dialog box of an application that contains a list of menus the user can choose from 
 *@ATK_ROLE_MENU_ITEM: An object usually contained in a menu that presents an action the user can choose
 *@ATK_ROLE_OPTION_PANE: A specialized pane whose primary use is inside a DIALOG
 *@ATK_ROLE_PAGE_TAB: An object that is a child of a page tab list
 *@ATK_ROLE_PAGE_TAB_LIST: An object that presents a series of panels (or page tabs), one at a time, through some mechanism provided by the object 
 *@ATK_ROLE_PANEL: A generic container that is often used to group objects
 *@ATK_ROLE_PASSWORD_TEXT: A text object uses for passwords, or other places where the text content is not shown visibly to the user
 *@ATK_ROLE_POPUP_MENU: A temporary window that is usually used to offer the user a list of choices, and then hides when the user selects one of those choices
 *@ATK_ROLE_PROGRESS_BAR: An object used to indicate how much of a task has been completed
 *@ATK_ROLE_PUSH_BUTTON: An object the user can manipulate to tell the application to do something
 *@ATK_ROLE_RADIO_BUTTON: A specialized check box that will cause other radio buttons in the same group to become unchecked when this one is checked
 *@ATK_ROLE_RADIO_MENU_ITEM: A check menu item which belongs to a group. At each instant exactly one of the radio menu items from a group is selected
 *@ATK_ROLE_ROOT_PANE: A specialized pane that has a glass pane and a layered pane as its children
 *@ATK_ROLE_ROW_HEADER: The header for a row of data
 *@ATK_ROLE_SCROLL_BAR: An object usually used to allow a user to incrementally view a large amount of data.
 *@ATK_ROLE_SCROLL_PANE: An object that allows a user to incrementally view a large amount of information
 *@ATK_ROLE_SEPARATOR: An object usually contained in a menu to provide a visible and logical separation of the contents in a menu
 *@ATK_ROLE_SLIDER: An object that allows the user to select from a bounded range
 *@ATK_ROLE_SPLIT_PANE: A specialized panel that presents two other panels at the same time
 *@ATK_ROLE_SPIN_BUTTON: An object used to get an integer or floating point number from the user
 *@ATK_ROLE_STATUSBAR: An object which reports messages of minor importance to the user
 *@ATK_ROLE_TABLE: An object used to represent information in terms of rows and columns
 *@ATK_ROLE_TABLE_CELL: A cell in a table
 *@ATK_ROLE_TABLE_COLUMN_HEADER: The header for a column of a table
 *@ATK_ROLE_TABLE_ROW_HEADER: The header for a row of a table
 *@ATK_ROLE_TEAR_OFF_MENU_ITEM: A menu item used to tear off and reattach its menu
 *@ATK_ROLE_TERMINAL: An object that represents an accessible terminal.  @Since: ATK-0.6
 *@ATK_ROLE_TEXT: An interactive widget that supports multiple lines of text and
 * optionally accepts user input, but whose purpose is not to solicit user input.
 * Thus ATK_ROLE_TEXT is appropriate for the text view in a plain text editor
 * but inappropriate for an input field in a dialog box or web form. For widgets
 * whose purpose is to solicit input from the user, see ATK_ROLE_ENTRY and
 * ATK_ROLE_PASSWORD_TEXT. For generic objects which display a brief amount of
 * textual information, see ATK_ROLE_STATIC.
 *@ATK_ROLE_TOGGLE_BUTTON: A specialized push button that can be checked or unchecked, but does not provide a separate indicator for the current state
 *@ATK_ROLE_TOOL_BAR: A bar or palette usually composed of push buttons or toggle buttons
 *@ATK_ROLE_TOOL_TIP: An object that provides information about another object
 *@ATK_ROLE_TREE: An object used to represent hierarchical information to the user
 *@ATK_ROLE_TREE_TABLE: An object capable of expanding and collapsing rows as well as showing multiple columns of data.   @Since: ATK-0.7
 *@ATK_ROLE_UNKNOWN: The object contains some Accessible information, but its role is not known
 *@ATK_ROLE_VIEWPORT: An object usually used in a scroll pane
 *@ATK_ROLE_WINDOW: A top level window with no title or border.
 *@ATK_ROLE_HEADER: An object that serves as a document header. @Since: ATK-1.1.1
 *@ATK_ROLE_FOOTER: An object that serves as a document footer.  @Since: ATK-1.1.1
 *@ATK_ROLE_PARAGRAPH: An object which is contains a paragraph of text content.   @Since: ATK-1.1.1
 *@ATK_ROLE_RULER: An object which describes margins and tab stops, etc. for text objects which it controls (should have CONTROLLER_FOR relation to such).   @Since: ATK-1.1.1
 *@ATK_ROLE_APPLICATION: The object is an application object, which may contain @ATK_ROLE_FRAME objects or other types of accessibles.  The root accessible of any application's ATK hierarchy should have ATK_ROLE_APPLICATION.   @Since: ATK-1.1.4
 *@ATK_ROLE_AUTOCOMPLETE: The object is a dialog or list containing items for insertion into an entry widget, for instance a list of words for completion of a text entry.   @Since: ATK-1.3
 *@ATK_ROLE_EDITBAR: The object is an editable text object in a toolbar.  @Since: ATK-1.5
 *@ATK_ROLE_EMBEDDED: The object is an embedded container within a document or panel.  This role is a grouping "hint" indicating that the contained objects share a context.  @Since: ATK-1.7.2
 *@ATK_ROLE_ENTRY: The object is a component whose textual content may be entered or modified by the user, provided @ATK_STATE_EDITABLE is present.   @Since: ATK-1.11
 *@ATK_ROLE_CHART: The object is a graphical depiction of quantitative data. It may contain multiple subelements whose attributes and/or description may be queried to obtain both the quantitative data and information about how the data is being presented. The LABELLED_BY relation is particularly important in interpreting objects of this type, as is the accessible-description property.  @Since: ATK-1.11
 *@ATK_ROLE_CAPTION: The object contains descriptive information, usually textual, about another user interface element such as a table, chart, or image.  @Since: ATK-1.11
 *@ATK_ROLE_DOCUMENT_FRAME: The object is a visual frame or container which contains a view of document content. Document frames may occur within another Document instance, in which case the second document may be said to be embedded in the containing instance. HTML frames are often ROLE_DOCUMENT_FRAME. Either this object, or a singleton descendant, should implement the Document interface.  @Since: ATK-1.11
 *@ATK_ROLE_HEADING: The object serves as a heading for content which follows it in a document. The 'heading level' of the heading, if availabe, may be obtained by querying the object's attributes.
 *@ATK_ROLE_PAGE: The object is a containing instance which encapsulates a page of information. @ATK_ROLE_PAGE is used in documents and content which support a paginated navigation model.  @Since: ATK-1.11
 *@ATK_ROLE_SECTION: The object is a containing instance of document content which constitutes a particular 'logical' section of the document. The type of content within a section, and the nature of the section division itself, may be obtained by querying the object's attributes. Sections may be nested. @Since: ATK-1.11
 *@ATK_ROLE_REDUNDANT_OBJECT: The object is redundant with another object in the hierarchy, and is exposed for purely technical reasons.  Objects of this role should normally be ignored by clients. @Since: ATK-1.11
 *@ATK_ROLE_FORM: The object is a container for form controls, for instance as part of a 
 * web form or user-input form within a document.  This role is primarily a tag/convenience for 
 * clients when navigating complex documents, it is not expected that ordinary GUI containers will 
 * always have ATK_ROLE_FORM. @Since: ATK-1.12.0
 *@ATK_ROLE_LINK: The object is a hypertext anchor, i.e. a "link" in a
 * hypertext document.  Such objects are distinct from 'inline'
 * content which may also use the Hypertext/Hyperlink interfaces
 * to indicate the range/location within a text object where
 * an inline or embedded object lies.  @Since: ATK-1.12.1
 *@ATK_ROLE_INPUT_METHOD_WINDOW: The object is a window or similar viewport 
 * which is used to allow composition or input of a 'complex character',
 * in other words it is an "input method window." @Since: ATK-1.12.1
 *@ATK_ROLE_TABLE_ROW: A row in a table.  @Since: ATK-2.1.0
 *@ATK_ROLE_TREE_ITEM: An object that represents an element of a tree.  @Since: ATK-2.1.0
 *@ATK_ROLE_DOCUMENT_SPREADSHEET: A document frame which contains a spreadsheet.  @Since: ATK-2.1.0
 *@ATK_ROLE_DOCUMENT_PRESENTATION: A document frame which contains a presentation or slide content.  @Since: ATK-2.1.0
 *@ATK_ROLE_DOCUMENT_TEXT: A document frame which contains textual content, such as found in a word processing application.  @Since: ATK-2.1.0
 *@ATK_ROLE_DOCUMENT_WEB: A document frame which contains HTML or other markup suitable for display in a web browser.  @Since: ATK-2.1.0
 *@ATK_ROLE_DOCUMENT_EMAIL: A document frame which contains email content to be displayed or composed either in plain text or HTML.  @Since: ATK-2.1.0
 *@ATK_ROLE_COMMENT: An object found within a document and designed to present a comment, note, or other annotation. In some cases, this object might not be visible until activated.  @Since: ATK-2.1.0
 *@ATK_ROLE_LIST_BOX: A non-collapsible list of choices the user can select from. @Since: ATK-2.1.0
 *@ATK_ROLE_GROUPING: A group of related widgets. This group typically has a label. @Since: ATK-2.1.0
 *@ATK_ROLE_IMAGE_MAP: An image map object. Usually a graphic with multiple hotspots, where each hotspot can be activated resulting in the loading of another document or section of a document. @Since: ATK-2.1.0
 *@ATK_ROLE_NOTIFICATION: A transitory object designed to present a message to the user, typically at the desktop level rather than inside a particular application.  @Since: ATK-2.1.0
 *@ATK_ROLE_INFO_BAR: An object designed to present a message to the user within an existing window. @Since: ATK-2.1.0
 *@ATK_ROLE_LEVEL_BAR: A bar that serves as a level indicator to, for instance, show the strength of a password or the state of a battery.  @Since: ATK-2.7.3
 *@ATK_ROLE_TITLE_BAR: A bar that serves as the title of a window or a
 * dialog. @Since: ATK-2.12
 *@ATK_ROLE_BLOCK_QUOTE: An object which contains a text section
 * that is quoted from another source. @Since: ATK-2.12
 *@ATK_ROLE_AUDIO: An object which represents an audio element. @Since: ATK-2.12
 *@ATK_ROLE_VIDEO: An object which represents a video element. @Since: ATK-2.12
 *@ATK_ROLE_DEFINITION: A definition of a term or concept. @Since: ATK-2.12
 *@ATK_ROLE_ARTICLE: A section of a page that consists of a
 * composition that forms an independent part of a document, page, or
 * site. Examples: A blog entry, a news story, a forum post. @Since:
 * ATK-2.12
 *@ATK_ROLE_LANDMARK: A region of a web page intended as a
 * navigational landmark. This is designed to allow Assistive
 * Technologies to provide quick navigation among key regions within a
 * document. @Since: ATK-2.12
 *@ATK_ROLE_LOG: A text widget or container holding log content, such
 * as chat history and error logs. In this role there is a
 * relationship between the arrival of new items in the log and the
 * reading order. The log contains a meaningful sequence and new
 * information is added only to the end of the log, not at arbitrary
 * points. @Since: ATK-2.12
 *@ATK_ROLE_MARQUEE: A container where non-essential information
 * changes frequently. Common usages of marquee include stock tickers
 * and ad banners. The primary difference between a marquee and a log
 * is that logs usually have a meaningful order or sequence of
 * important content changes. @Since: ATK-2.12
 *@ATK_ROLE_MATH: A text widget or container that holds a mathematical
 * expression. @Since: ATK-2.12
 *@ATK_ROLE_RATING: A widget whose purpose is to display a rating,
 * such as the number of stars associated with a song in a media
 * player. Objects of this role should also implement
 * AtkValue. @Since: ATK-2.12
 *@ATK_ROLE_TIMER: An object containing a numerical counter which
 * indicates an amount of elapsed time from a start point, or the time
 * remaining until an end point. @Since: ATK-2.12
 *@ATK_ROLE_DESCRIPTION_LIST: An object that represents a list of
 * term-value groups. A term-value group represents a individual
 * description and consist of one or more names
 * (ATK_ROLE_DESCRIPTION_TERM) followed by one or more values
 * (ATK_ROLE_DESCRIPTION_VALUE). For each list, there should not be
 * more than one group with the same term name. @Since: ATK-2.12
 *@ATK_ROLE_DESCRIPTION_TERM: An object that represents the term, or
 * name, part of a term-description group in a description
 * list. @Since: ATK-2.12
 *@ATK_ROLE_DESCRIPTION_VALUE: An object that represents the
 * description, definition or value of a term-description group in a
 * description list. The values within a group are alternatives,
 * meaning that you can have several ATK_ROLE_DESCRIPTION_VALUE for a
 * given ATK_ROLE_DESCRIPTION_TERM. @Since: ATK-2.12
 *@ATK_ROLE_STATIC: A generic non-container object whose purpose is to display a
 * brief amount of information to the user and whose role is known by the
 * implementor but lacks semantic value for the user. Examples in which
 * ATK_ROLE_STATIC is appropriate include the message displayed in a message box
 * and an image used as an alternative means to display text. ATK_ROLE_STATIC
 * should not be applied to widgets which are traditionally interactive, objects
 * which display a significant amount of content, or any object which has an
 * accessible relation pointing to another object. Implementors should expose the
 * displayed information through the accessible name of the object. If doing so seems
 * inappropriate, it may indicate that a different role should be used. For
 * labels which describe another widget, see ATK_ROLE_LABEL. For text views, see
 * ATK_ROLE_TEXT. For generic containers, see ATK_ROLE_PANEL. For objects whose
 * role is not known by the implementor, see ATK_ROLE_UNKNOWN. @Since: ATK-2.16.
 *@ATK_ROLE_LAST_DEFINED: not a valid role, used for finding end of the enumeration
 *
 * Describes the role of an object
 *
 * These are the built-in enumerated roles that UI components can have in
 * ATK.  Other roles may be added at runtime, so an AtkRole >=
 * ATK_ROLE_LAST_DEFINED is not necessarily an error.
 **/
typedef enum
{
  ATK_ROLE_INVALID = 0,
  ATK_ROLE_ACCEL_LABEL,      /*<nick=accelerator-label>*/
  ATK_ROLE_ALERT,
  ATK_ROLE_ANIMATION,
  ATK_ROLE_ARROW,
  ATK_ROLE_CALENDAR,
  ATK_ROLE_CANVAS,
  ATK_ROLE_CHECK_BOX,
  ATK_ROLE_CHECK_MENU_ITEM,
  ATK_ROLE_COLOR_CHOOSER,
  ATK_ROLE_COLUMN_HEADER,
  ATK_ROLE_COMBO_BOX,
  ATK_ROLE_DATE_EDITOR,
  ATK_ROLE_DESKTOP_ICON,
  ATK_ROLE_DESKTOP_FRAME,
  ATK_ROLE_DIAL,
  ATK_ROLE_DIALOG,
  ATK_ROLE_DIRECTORY_PANE,
  ATK_ROLE_DRAWING_AREA,
  ATK_ROLE_FILE_CHOOSER,
  ATK_ROLE_FILLER,
  ATK_ROLE_FONT_CHOOSER,
  ATK_ROLE_FRAME,
  ATK_ROLE_GLASS_PANE,
  ATK_ROLE_HTML_CONTAINER,
  ATK_ROLE_ICON,
  ATK_ROLE_IMAGE,
  ATK_ROLE_INTERNAL_FRAME,
  ATK_ROLE_LABEL,
  ATK_ROLE_LAYERED_PANE,
  ATK_ROLE_LIST,
  ATK_ROLE_LIST_ITEM,
  ATK_ROLE_MENU,
  ATK_ROLE_MENU_BAR,
  ATK_ROLE_MENU_ITEM,
  ATK_ROLE_OPTION_PANE,
  ATK_ROLE_PAGE_TAB,
  ATK_ROLE_PAGE_TAB_LIST,
  ATK_ROLE_PANEL,
  ATK_ROLE_PASSWORD_TEXT,
  ATK_ROLE_POPUP_MENU,
  ATK_ROLE_PROGRESS_BAR,
  ATK_ROLE_PUSH_BUTTON,
  ATK_ROLE_RADIO_BUTTON,
  ATK_ROLE_RADIO_MENU_ITEM,
  ATK_ROLE_ROOT_PANE,
  ATK_ROLE_ROW_HEADER,
  ATK_ROLE_SCROLL_BAR,
  ATK_ROLE_SCROLL_PANE,
  ATK_ROLE_SEPARATOR,
  ATK_ROLE_SLIDER,
  ATK_ROLE_SPLIT_PANE,
  ATK_ROLE_SPIN_BUTTON,
  ATK_ROLE_STATUSBAR,
  ATK_ROLE_TABLE,
  ATK_ROLE_TABLE_CELL,
  ATK_ROLE_TABLE_COLUMN_HEADER,
  ATK_ROLE_TABLE_ROW_HEADER,
  ATK_ROLE_TEAR_OFF_MENU_ITEM,
  ATK_ROLE_TERMINAL,
  ATK_ROLE_TEXT,
  ATK_ROLE_TOGGLE_BUTTON,
  ATK_ROLE_TOOL_BAR,
  ATK_ROLE_TOOL_TIP,
  ATK_ROLE_TREE,
  ATK_ROLE_TREE_TABLE,
  ATK_ROLE_UNKNOWN,
  ATK_ROLE_VIEWPORT,
  ATK_ROLE_WINDOW,
  ATK_ROLE_HEADER,
  ATK_ROLE_FOOTER,
  ATK_ROLE_PARAGRAPH,
  ATK_ROLE_RULER,
  ATK_ROLE_APPLICATION,
  ATK_ROLE_AUTOCOMPLETE,
  ATK_ROLE_EDITBAR,          /*<nick=edit-bar>*/
  ATK_ROLE_EMBEDDED,
  ATK_ROLE_ENTRY,
  ATK_ROLE_CHART,
  ATK_ROLE_CAPTION,
  ATK_ROLE_DOCUMENT_FRAME,
  ATK_ROLE_HEADING,
  ATK_ROLE_PAGE,
  ATK_ROLE_SECTION,
  ATK_ROLE_REDUNDANT_OBJECT,
  ATK_ROLE_FORM,
  ATK_ROLE_LINK,
  ATK_ROLE_INPUT_METHOD_WINDOW,
  ATK_ROLE_TABLE_ROW,
  ATK_ROLE_TREE_ITEM,
  ATK_ROLE_DOCUMENT_SPREADSHEET,
  ATK_ROLE_DOCUMENT_PRESENTATION,
  ATK_ROLE_DOCUMENT_TEXT,
  ATK_ROLE_DOCUMENT_WEB,
  ATK_ROLE_DOCUMENT_EMAIL,
  ATK_ROLE_COMMENT,
  ATK_ROLE_LIST_BOX,
  ATK_ROLE_GROUPING,
  ATK_ROLE_IMAGE_MAP,
  ATK_ROLE_NOTIFICATION,
  ATK_ROLE_INFO_BAR,
  ATK_ROLE_LEVEL_BAR,
  ATK_ROLE_TITLE_BAR,
  ATK_ROLE_BLOCK_QUOTE,
  ATK_ROLE_AUDIO,
  ATK_ROLE_VIDEO,
  ATK_ROLE_DEFINITION,
  ATK_ROLE_ARTICLE,
  ATK_ROLE_LANDMARK,
  ATK_ROLE_LOG,
  ATK_ROLE_MARQUEE,
  ATK_ROLE_MATH,
  ATK_ROLE_RATING,
  ATK_ROLE_TIMER,
  ATK_ROLE_DESCRIPTION_LIST,
  ATK_ROLE_DESCRIPTION_TERM,
  ATK_ROLE_DESCRIPTION_VALUE,
  ATK_ROLE_STATIC,
  ATK_ROLE_LAST_DEFINED
} AtkRole;

/**
 *AtkLayer:
 *@ATK_LAYER_INVALID: The object does not have a layer
 *@ATK_LAYER_BACKGROUND: This layer is reserved for the desktop background
 *@ATK_LAYER_CANVAS: This layer is used for Canvas components
 *@ATK_LAYER_WIDGET: This layer is normally used for components
 *@ATK_LAYER_MDI: This layer is used for layered components
 *@ATK_LAYER_POPUP: This layer is used for popup components, such as menus
 *@ATK_LAYER_OVERLAY: This layer is reserved for future use.
 *@ATK_LAYER_WINDOW: This layer is used for toplevel windows.
 *
 * Describes the layer of a component
 *
 * These enumerated "layer values" are used when determining which UI
 * rendering layer a component is drawn into, which can help in making
 * determinations of when components occlude one another.
 **/
typedef enum
{
  ATK_LAYER_INVALID,
  ATK_LAYER_BACKGROUND,
  ATK_LAYER_CANVAS,
  ATK_LAYER_WIDGET,
  ATK_LAYER_MDI,
  ATK_LAYER_POPUP,
  ATK_LAYER_OVERLAY,
  ATK_LAYER_WINDOW
} AtkLayer;

/**
 * AtkAttributeSet:
 *
 * This is a singly-linked list (a #GSList) of #AtkAttribute. It is
 * used by atk_text_get_run_attributes(),
 * atk_text_get_default_attributes(),
 * atk_editable_text_set_run_attributes(),
 * atk_document_get_attributes() and atk_object_get_attributes()
 **/
typedef GSList AtkAttributeSet;

/**
 * AtkAttribute:
 * @name: The attribute name.
 * @value: the value of the attribute, represented as a string.
 *
 * AtkAttribute is a string name/value pair representing a generic
 * attribute. This can be used to expose additional information from
 * an accessible object as a whole (see atk_object_get_attributes())
 * or an document (see atk_document_get_attributes()). In the case of
 * text attributes (see atk_text_get_default_attributes()),
 * #AtkTextAttribute enum defines all the possible text attribute
 * names. You can use atk_text_attribute_get_name() to get the string
 * name from the enum value. See also atk_text_attribute_for_name()
 * and atk_text_attribute_get_value() for more information.
 *
 * A string name/value pair representing a generic attribute.
 **/
typedef struct _AtkAttribute AtkAttribute;

struct _AtkAttribute {
  gchar* name;
  gchar* value;
};

#define ATK_TYPE_OBJECT                           (atk_object_get_type ())
#define ATK_OBJECT(obj)                           (G_TYPE_CHECK_INSTANCE_CAST ((obj), ATK_TYPE_OBJECT, AtkObject))
#define ATK_OBJECT_CLASS(klass)                   (G_TYPE_CHECK_CLASS_CAST ((klass), ATK_TYPE_OBJECT, AtkObjectClass))
#define ATK_IS_OBJECT(obj)                        (G_TYPE_CHECK_INSTANCE_TYPE ((obj), ATK_TYPE_OBJECT))
#define ATK_IS_OBJECT_CLASS(klass)                (G_TYPE_CHECK_CLASS_TYPE ((klass), ATK_TYPE_OBJECT))
#define ATK_OBJECT_GET_CLASS(obj)                 (G_TYPE_INSTANCE_GET_CLASS ((obj), ATK_TYPE_OBJECT, AtkObjectClass))

#define ATK_TYPE_IMPLEMENTOR                      (atk_implementor_get_type ())
#define ATK_IS_IMPLEMENTOR(obj)                   G_TYPE_CHECK_INSTANCE_TYPE ((obj), ATK_TYPE_IMPLEMENTOR)
#define ATK_IMPLEMENTOR(obj)                      G_TYPE_CHECK_INSTANCE_CAST ((obj), ATK_TYPE_IMPLEMENTOR, AtkImplementor)
#define ATK_IMPLEMENTOR_GET_IFACE(obj)            (G_TYPE_INSTANCE_GET_INTERFACE ((obj), ATK_TYPE_IMPLEMENTOR, AtkImplementorIface))


typedef struct _AtkImplementor            AtkImplementor; /* dummy typedef */
typedef struct _AtkImplementorIface       AtkImplementorIface;


typedef struct _AtkObject                 AtkObject;
typedef struct _AtkObjectClass            AtkObjectClass;
typedef struct _AtkRelationSet            AtkRelationSet;
typedef struct _AtkStateSet               AtkStateSet;

/**
 * AtkPropertyValues:
 * @property_name: The name of the ATK property which has changed.
 * @old_value: NULL. This field is not used anymore.
 * @new_value: The new value of the named property.
 *
 * Note: @old_value field of #AtkPropertyValues will not contain a
 * valid value. This is a field defined with the purpose of contain
 * the previous value of the property, but is not used anymore.
 *
 **/
struct _AtkPropertyValues
{
  const gchar  *property_name;
  GValue old_value;
  GValue new_value;
};

typedef struct _AtkPropertyValues        AtkPropertyValues;

/**
 * AtkFunction:
 * @user_data: custom data defined by the user
 *
 * An AtkFunction is a function definition used for padding which has
 * been added to class and interface structures to allow for expansion
 * in the future.
 *
 * Returns: not used
 */
typedef gboolean (*AtkFunction)          (gpointer user_data);
/*
 * For most properties the old_value field of AtkPropertyValues will
 * not contain a valid value.
 *
 * Currently, the only property for which old_value is used is
 * accessible-state; for instance if there is a focus state the
 * property change handler will be called for the object which lost the focus
 * with the old_value containing an AtkState value corresponding to focused
 * and the property change handler will be called for the object which
 * received the focus with the new_value containing an AtkState value
 * corresponding to focused.
 */

/**
 * AtkPropertyChangeHandler:
 * @obj: atkobject which property changes
 * @vals: values changed
 *
 * An AtkPropertyChangeHandler is a function which is executed when an
 * AtkObject's property changes value. It is specified in a call to
 * atk_object_connect_property_change_handler().
 *
 * Deprecated: Since 2.12.
 */
typedef void (*AtkPropertyChangeHandler) (AtkObject* obj, AtkPropertyValues* vals);


struct _AtkObject
{
  GObject parent;

  gchar *description;
  gchar *name;
  AtkObject *accessible_parent;
  AtkRole role;
  AtkRelationSet *relation_set;
  AtkLayer layer;
};


/**
 * AtkObjectClass:
 * @connect_property_change_handler: specifies a function to be called
 *   when a property changes value. This virtual function is
 *   deprecated since 2.12 and it should not be overriden. Connect
 *   directly to property-change or notify signal instead.
 * @remove_property_change_handler: removes a property changed handler
 *   as returned by @connect_property_change_handler. This virtual
 *   function is deprecated sice 2.12 and it should not be overriden.
 * @focus_event: The signal handler which is executed when there is a
 *   focus event for an object. This virtual function is deprecated
 *   since 2.9.4 and it should not be overriden. Use
 *   state-changed:focused signal instead.
 */
struct _AtkObjectClass
{
  GObjectClass parent;

  /*
   * Gets the accessible name of the object
   */
  const gchar*             (* get_name)            (AtkObject                *accessible);
  /*
   * Gets the accessible description of the object
   */
  const gchar*             (* get_description)     (AtkObject                *accessible);
  /*
   * Gets the accessible parent of the object
   */
  AtkObject*               (*get_parent)           (AtkObject                *accessible);

  /*
   * Gets the number of accessible children of the object
   */
  gint                    (* get_n_children)       (AtkObject                *accessible);
  /*
   * Returns a reference to the specified accessible child of the object.
   * The accessible children are 0-based so the first accessible child is
   * at index 0, the second at index 1 and so on.
   */
  AtkObject*              (* ref_child)            (AtkObject                *accessible,
                                                    gint                      i);
  /*
   * Gets the 0-based index of this object in its parent; returns -1 if the
   * object does not have an accessible parent.
   */
  gint                    (* get_index_in_parent) (AtkObject                 *accessible);
  /*
   * Gets the RelationSet associated with the object
   */
  AtkRelationSet*         (* ref_relation_set)    (AtkObject                 *accessible);
  /*
   * Gets the role of the object
   */
  AtkRole                 (* get_role)            (AtkObject                 *accessible);
  AtkLayer                (* get_layer)           (AtkObject                 *accessible);
  gint                    (* get_mdi_zorder)      (AtkObject                 *accessible);
  /*
   * Gets the state set of the object
   */
  AtkStateSet*            (* ref_state_set)       (AtkObject                 *accessible);
  /*
   * Sets the accessible name of the object
   */
  void                    (* set_name)            (AtkObject                 *accessible,
                                                   const gchar               *name);
  /*
   * Sets the accessible description of the object
   */
  void                    (* set_description)     (AtkObject                 *accessible,
                                                   const gchar               *description);
  /*
   * Sets the accessible parent of the object
   */
  void                    (* set_parent)          (AtkObject                 *accessible,
                                                   AtkObject                 *parent);
  /*
   * Sets the accessible role of the object
   */
  void                    (* set_role)            (AtkObject                 *accessible,
                                                   AtkRole                   role);
  /*
   * Specifies a function to be called when a property changes value
   */
guint                     (* connect_property_change_handler)    (AtkObject
                 *accessible,
                                                                  AtkPropertyChangeHandler       *handler);
  /*
   * Removes a property change handler which was specified using
   * connect_property_change_handler
   */
void                      (* remove_property_change_handler)     (AtkObject
                *accessible,
                                                                  guint
                handler_id);
void                      (* initialize)                         (AtkObject                     *accessible,
                                                                  gpointer                      data);
  /*
   * The signal handler which is executed when there is a change in the
   * children of the object
   */
  void                    (* children_changed)    (AtkObject                  *accessible,
                                                   guint                      change_index,
                                                   gpointer                   changed_child);
  /*
   * The signal handler which is executed  when there is a focus event
   * for an object.
   */
  void                    (* focus_event)         (AtkObject                  *accessible,
                                                   gboolean                   focus_in);
  /*
   * The signal handler which is executed  when there is a property_change 
   * signal for an object.
   */
  void                    (* property_change)     (AtkObject                  *accessible,
                                                   AtkPropertyValues          *values);
  /*
   * The signal handler which is executed  when there is a state_change 
   * signal for an object.
   */
  void                    (* state_change)        (AtkObject                  *accessible,
                                                   const gchar                *name,
                                                   gboolean                   state_set);
  /*
   * The signal handler which is executed when there is a change in the
   * visible data for an object
   */
  void                    (*visible_data_changed) (AtkObject                  *accessible);

  /*
   * The signal handler which is executed when there is a change in the
   * 'active' child or children of the object, for instance when 
   * interior focus changes in a table or list.  This signal should be emitted
   * by objects whose state includes ATK_STATE_MANAGES_DESCENDANTS.
   */
  void                    (*active_descendant_changed) (AtkObject                  *accessible,
                                                        gpointer                   *child);

  /*    	
   * Gets a list of properties applied to this object as a whole, as an #AtkAttributeSet consisting of name-value pairs. 
   * Since ATK 1.12
   */
  AtkAttributeSet* 	  (*get_attributes)            (AtkObject                  *accessible);

  const gchar*            (*get_object_locale)         (AtkObject                  *accessible);

  AtkFunction             pad1;
};

ATK_AVAILABLE_IN_ALL
GType            atk_object_get_type   (void);

/**
 * AtkImplementorIface:
 *
 * The AtkImplementor interface is implemented by objects for which
 * AtkObject peers may be obtained via calls to
 * iface->(ref_accessible)(implementor);
 */
struct _AtkImplementorIface
{
  GTypeInterface parent;

  AtkObject*   (*ref_accessible) (AtkImplementor *implementor);
};

ATK_AVAILABLE_IN_ALL
GType atk_implementor_get_type (void);
ATK_AVAILABLE_IN_ALL
AtkObject*              atk_implementor_ref_accessible            (AtkImplementor *implementor);

/*
 * Properties directly supported by AtkObject
 */

ATK_AVAILABLE_IN_ALL
const gchar*            atk_object_get_name                       (AtkObject *accessible);
ATK_AVAILABLE_IN_ALL
const gchar*            atk_object_get_description                (AtkObject *accessible);
ATK_AVAILABLE_IN_ALL
AtkObject*              atk_object_get_parent                     (AtkObject *accessible);
ATK_AVAILABLE_IN_ALL
AtkObject*              atk_object_peek_parent                    (AtkObject *accessible);
ATK_AVAILABLE_IN_ALL
gint                    atk_object_get_n_accessible_children      (AtkObject *accessible);
ATK_AVAILABLE_IN_ALL
AtkObject*              atk_object_ref_accessible_child           (AtkObject *accessible,
                                                                   gint        i);
ATK_AVAILABLE_IN_ALL
AtkRelationSet*         atk_object_ref_relation_set               (AtkObject *accessible);
ATK_AVAILABLE_IN_ALL
AtkRole                 atk_object_get_role                       (AtkObject *accessible);

ATK_DEPRECATED_FOR(atk_component_get_layer)
AtkLayer                atk_object_get_layer                      (AtkObject *accessible);
ATK_DEPRECATED_FOR(atk_component_get_mdi_zorder)
gint                    atk_object_get_mdi_zorder                 (AtkObject *accessible);

ATK_AVAILABLE_IN_ALL
AtkAttributeSet*        atk_object_get_attributes                 (AtkObject *accessible);
ATK_AVAILABLE_IN_ALL
AtkStateSet*            atk_object_ref_state_set                  (AtkObject *accessible);
ATK_AVAILABLE_IN_ALL
gint                    atk_object_get_index_in_parent            (AtkObject *accessible);
ATK_AVAILABLE_IN_ALL
void                    atk_object_set_name                       (AtkObject *accessible,
                                                                   const gchar *name);
ATK_AVAILABLE_IN_ALL
void                    atk_object_set_description                (AtkObject *accessible,
                                                                   const gchar *description);
ATK_AVAILABLE_IN_ALL
void                    atk_object_set_parent                     (AtkObject *accessible,
                                                                   AtkObject *parent);
ATK_AVAILABLE_IN_ALL
void                    atk_object_set_role                       (AtkObject *accessible,
                                                                   AtkRole   role);


ATK_DEPRECATED_IN_2_12
guint                atk_object_connect_property_change_handler  (AtkObject                      *accessible,
                                                                  AtkPropertyChangeHandler       *handler);
ATK_DEPRECATED_IN_2_12
void                 atk_object_remove_property_change_handler   (AtkObject                      *accessible,
                                                                  guint                          handler_id);

ATK_AVAILABLE_IN_ALL
void                 atk_object_notify_state_change              (AtkObject                      *accessible,
                                                                  AtkState                       state,
                                                                  gboolean                       value);
ATK_AVAILABLE_IN_ALL
void                 atk_object_initialize                       (AtkObject                     *accessible,
                                                                  gpointer                      data);

ATK_AVAILABLE_IN_ALL
const gchar*          atk_role_get_name      (AtkRole         role);
ATK_AVAILABLE_IN_ALL
AtkRole               atk_role_for_name      (const gchar     *name);


/* NEW in 1.1: convenience API */
ATK_AVAILABLE_IN_ALL
gboolean              atk_object_add_relationship              (AtkObject      *object,
								AtkRelationType relationship,
								AtkObject      *target);
ATK_AVAILABLE_IN_ALL
gboolean              atk_object_remove_relationship           (AtkObject      *object,
								AtkRelationType relationship,
								AtkObject      *target);
ATK_AVAILABLE_IN_ALL
const gchar*          atk_role_get_localized_name              (AtkRole     role);
ATK_DEPRECATED_IN_2_12
AtkRole               atk_role_register                        (const gchar *name);
ATK_AVAILABLE_IN_2_8
const gchar*          atk_object_get_object_locale             (AtkObject   *accessible);

G_END_DECLS

#endif /* __ATK_OBJECT_H__ */