atkobject.h

linux下图形库开发包atk-1.4.0.tar.gz

/* 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_OBJECT_H__
#define __ATK_OBJECT_H__

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#include <glib-object.h>
#include <atk/atkstate.h>
#include <atk/atkrelationtype.h>

/*
 * 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
 *@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 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
 *@ATK_ROLE_TEXT: An object that presents text to the user
 *@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
 *@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.
 *@ATK_ROLE_FOOTER: An object that serves as a document footer.
 *@ATK_ROLE_PARAGRAPH: An object which is contains a paragraph of text content.
 *@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).
 *@ATK_ROLE_APPLICATION: The object is an application object, which may contain @ATK_ROLE_FRAME objects or other types of accessibles.
 *@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.
 *@ATK_ROLE_LAST_DEFINED: not a valid role, used for finding end of 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,
  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_LAST_DEFINED
} AtkRole;

AtkRole                  atk_role_register        (const gchar *name);

/**
 *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;

#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;

struct _AtkPropertyValues
{
  const gchar  *property_name;
  GValue old_value;
  GValue new_value;
};

typedef struct _AtkPropertyValues        AtkPropertyValues;

typedef gboolean (*AtkFunction)          (gpointer 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.
 */
typedef void (*AtkPropertyChangeHandler) (AtkObject*, AtkPropertyValues*);