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wxWidgets/interface/wx/access.h

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/////////////////////////////////////////////////////////////////////////////
// Name: access.h
// Purpose: interface of wxAccessible
// Author: wxWidgets team
// RCS-ID: $Id$
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
/**
wxAccessible functions return a wxAccStatus error code,
which may be one of this enum's values.
*/
typedef enum
{
wxACC_FAIL, //!< The function failed.
wxACC_FALSE, //!< The function returned false.
wxACC_OK, //!< The function completed successfully.
wxACC_NOT_IMPLEMENTED, //!< The function is not implemented.
wxACC_NOT_SUPPORTED //!< The function is not supported.
} wxAccStatus;
/**
Directions of navigation are represented by this enum.
*/
typedef enum
{
wxNAVDIR_DOWN,
wxNAVDIR_FIRSTCHILD,
wxNAVDIR_LASTCHILD,
wxNAVDIR_LEFT,
wxNAVDIR_NEXT,
wxNAVDIR_PREVIOUS,
wxNAVDIR_RIGHT,
wxNAVDIR_UP
} wxNavDir;
/**
The role of a user interface element is represented by the values of this enum.
*/
typedef enum {
wxROLE_NONE,
wxROLE_SYSTEM_ALERT,
wxROLE_SYSTEM_ANIMATION,
wxROLE_SYSTEM_APPLICATION,
wxROLE_SYSTEM_BORDER,
wxROLE_SYSTEM_BUTTONDROPDOWN,
wxROLE_SYSTEM_BUTTONDROPDOWNGRID,
wxROLE_SYSTEM_BUTTONMENU,
wxROLE_SYSTEM_CARET,
wxROLE_SYSTEM_CELL,
wxROLE_SYSTEM_CHARACTER,
wxROLE_SYSTEM_CHART,
wxROLE_SYSTEM_CHECKBUTTON,
wxROLE_SYSTEM_CLIENT,
wxROLE_SYSTEM_CLOCK,
wxROLE_SYSTEM_COLUMN,
wxROLE_SYSTEM_COLUMNHEADER,
wxROLE_SYSTEM_COMBOBOX,
wxROLE_SYSTEM_CURSOR,
wxROLE_SYSTEM_DIAGRAM,
wxROLE_SYSTEM_DIAL,
wxROLE_SYSTEM_DIALOG,
wxROLE_SYSTEM_DOCUMENT,
wxROLE_SYSTEM_DROPLIST,
wxROLE_SYSTEM_EQUATION,
wxROLE_SYSTEM_GRAPHIC,
wxROLE_SYSTEM_GRIP,
wxROLE_SYSTEM_GROUPING,
wxROLE_SYSTEM_HELPBALLOON,
wxROLE_SYSTEM_HOTKEYFIELD,
wxROLE_SYSTEM_INDICATOR,
wxROLE_SYSTEM_LINK,
wxROLE_SYSTEM_LIST,
wxROLE_SYSTEM_LISTITEM,
wxROLE_SYSTEM_MENUBAR,
wxROLE_SYSTEM_MENUITEM,
wxROLE_SYSTEM_MENUPOPUP,
wxROLE_SYSTEM_OUTLINE,
wxROLE_SYSTEM_OUTLINEITEM,
wxROLE_SYSTEM_PAGETAB,
wxROLE_SYSTEM_PAGETABLIST,
wxROLE_SYSTEM_PANE,
wxROLE_SYSTEM_PROGRESSBAR,
wxROLE_SYSTEM_PROPERTYPAGE,
wxROLE_SYSTEM_PUSHBUTTON,
wxROLE_SYSTEM_RADIOBUTTON,
wxROLE_SYSTEM_ROW,
wxROLE_SYSTEM_ROWHEADER,
wxROLE_SYSTEM_SCROLLBAR,
wxROLE_SYSTEM_SEPARATOR,
wxROLE_SYSTEM_SLIDER,
wxROLE_SYSTEM_SOUND,
wxROLE_SYSTEM_SPINBUTTON,
wxROLE_SYSTEM_STATICTEXT,
wxROLE_SYSTEM_STATUSBAR,
wxROLE_SYSTEM_TABLE,
wxROLE_SYSTEM_TEXT,
wxROLE_SYSTEM_TITLEBAR,
wxROLE_SYSTEM_TOOLBAR,
wxROLE_SYSTEM_TOOLTIP,
wxROLE_SYSTEM_WHITESPACE,
wxROLE_SYSTEM_WINDOW
} wxAccRole;
/**
Objects are represented by a wxAccObject enum value.
*/
typedef enum {
wxOBJID_WINDOW = 0x00000000,
wxOBJID_SYSMENU = 0xFFFFFFFF,
wxOBJID_TITLEBAR = 0xFFFFFFFE,
wxOBJID_MENU = 0xFFFFFFFD,
wxOBJID_CLIENT = 0xFFFFFFFC,
wxOBJID_VSCROLL = 0xFFFFFFFB,
wxOBJID_HSCROLL = 0xFFFFFFFA,
wxOBJID_SIZEGRIP = 0xFFFFFFF9,
wxOBJID_CARET = 0xFFFFFFF8,
wxOBJID_CURSOR = 0xFFFFFFF7,
wxOBJID_ALERT = 0xFFFFFFF6,
wxOBJID_SOUND = 0xFFFFFFF5
} wxAccObject;
/**
Selection actions are identified by the wxAccSelectionFlags values.
*/
typedef enum
{
wxACC_SEL_NONE = 0,
wxACC_SEL_TAKEFOCUS = 1,
wxACC_SEL_TAKESELECTION = 2,
wxACC_SEL_EXTENDSELECTION = 4,
wxACC_SEL_ADDSELECTION = 8,
wxACC_SEL_REMOVESELECTION = 16
} wxAccSelectionFlags;
//@{
/**
Represents a status of the system.
*/
#define wxACC_STATE_SYSTEM_ALERT_HIGH 0x00000001
#define wxACC_STATE_SYSTEM_ALERT_MEDIUM 0x00000002
#define wxACC_STATE_SYSTEM_ALERT_LOW 0x00000004
#define wxACC_STATE_SYSTEM_ANIMATED 0x00000008
#define wxACC_STATE_SYSTEM_BUSY 0x00000010
#define wxACC_STATE_SYSTEM_CHECKED 0x00000020
#define wxACC_STATE_SYSTEM_COLLAPSED 0x00000040
#define wxACC_STATE_SYSTEM_DEFAULT 0x00000080
#define wxACC_STATE_SYSTEM_EXPANDED 0x00000100
#define wxACC_STATE_SYSTEM_EXTSELECTABLE 0x00000200
#define wxACC_STATE_SYSTEM_FLOATING 0x00000400
#define wxACC_STATE_SYSTEM_FOCUSABLE 0x00000800
#define wxACC_STATE_SYSTEM_FOCUSED 0x00001000
#define wxACC_STATE_SYSTEM_HOTTRACKED 0x00002000
#define wxACC_STATE_SYSTEM_INVISIBLE 0x00004000
#define wxACC_STATE_SYSTEM_MARQUEED 0x00008000
#define wxACC_STATE_SYSTEM_MIXED 0x00010000
#define wxACC_STATE_SYSTEM_MULTISELECTABLE 0x00020000
#define wxACC_STATE_SYSTEM_OFFSCREEN 0x00040000
#define wxACC_STATE_SYSTEM_PRESSED 0x00080000
#define wxACC_STATE_SYSTEM_PROTECTED 0x00100000
#define wxACC_STATE_SYSTEM_READONLY 0x00200000
#define wxACC_STATE_SYSTEM_SELECTABLE 0x00400000
#define wxACC_STATE_SYSTEM_SELECTED 0x00800000
#define wxACC_STATE_SYSTEM_SELFVOICING 0x01000000
#define wxACC_STATE_SYSTEM_UNAVAILABLE 0x02000000
//@}
//@{
/**
An event identifier that can be sent via wxAccessible::NotifyEvent.
*/
#define wxACC_EVENT_SYSTEM_SOUND 0x0001
#define wxACC_EVENT_SYSTEM_ALERT 0x0002
#define wxACC_EVENT_SYSTEM_FOREGROUND 0x0003
#define wxACC_EVENT_SYSTEM_MENUSTART 0x0004
#define wxACC_EVENT_SYSTEM_MENUEND 0x0005
#define wxACC_EVENT_SYSTEM_MENUPOPUPSTART 0x0006
#define wxACC_EVENT_SYSTEM_MENUPOPUPEND 0x0007
#define wxACC_EVENT_SYSTEM_CAPTURESTART 0x0008
#define wxACC_EVENT_SYSTEM_CAPTUREEND 0x0009
#define wxACC_EVENT_SYSTEM_MOVESIZESTART 0x000A
#define wxACC_EVENT_SYSTEM_MOVESIZEEND 0x000B
#define wxACC_EVENT_SYSTEM_CONTEXTHELPSTART 0x000C
#define wxACC_EVENT_SYSTEM_CONTEXTHELPEND 0x000D
#define wxACC_EVENT_SYSTEM_DRAGDROPSTART 0x000E
#define wxACC_EVENT_SYSTEM_DRAGDROPEND 0x000F
#define wxACC_EVENT_SYSTEM_DIALOGSTART 0x0010
#define wxACC_EVENT_SYSTEM_DIALOGEND 0x0011
#define wxACC_EVENT_SYSTEM_SCROLLINGSTART 0x0012
#define wxACC_EVENT_SYSTEM_SCROLLINGEND 0x0013
#define wxACC_EVENT_SYSTEM_SWITCHSTART 0x0014
#define wxACC_EVENT_SYSTEM_SWITCHEND 0x0015
#define wxACC_EVENT_SYSTEM_MINIMIZESTART 0x0016
#define wxACC_EVENT_SYSTEM_MINIMIZEEND 0x0017
#define wxACC_EVENT_OBJECT_CREATE 0x8000
#define wxACC_EVENT_OBJECT_DESTROY 0x8001
#define wxACC_EVENT_OBJECT_SHOW 0x8002
#define wxACC_EVENT_OBJECT_HIDE 0x8003
#define wxACC_EVENT_OBJECT_REORDER 0x8004
#define wxACC_EVENT_OBJECT_FOCUS 0x8005
#define wxACC_EVENT_OBJECT_SELECTION 0x8006
#define wxACC_EVENT_OBJECT_SELECTIONADD 0x8007
#define wxACC_EVENT_OBJECT_SELECTIONREMOVE 0x8008
#define wxACC_EVENT_OBJECT_SELECTIONWITHIN 0x8009
#define wxACC_EVENT_OBJECT_STATECHANGE 0x800A
#define wxACC_EVENT_OBJECT_LOCATIONCHANGE 0x800B
#define wxACC_EVENT_OBJECT_NAMECHANGE 0x800C
#define wxACC_EVENT_OBJECT_DESCRIPTIONCHANGE 0x800D
#define wxACC_EVENT_OBJECT_VALUECHANGE 0x800E
#define wxACC_EVENT_OBJECT_PARENTCHANGE 0x800F
#define wxACC_EVENT_OBJECT_HELPCHANGE 0x8010
#define wxACC_EVENT_OBJECT_DEFACTIONCHANGE 0x8011
#define wxACC_EVENT_OBJECT_ACCELERATORCHANGE 0x8012
//@}
/**
@class wxAccessible
The wxAccessible class allows wxWidgets applications, and wxWidgets itself,
to return extended information about user interface elements to client
applications such as screen readers. This is the main way in which wxWidgets
implements accessibility features.
At present, only Microsoft Active Accessibility is supported by this class.
To use this class, derive from wxAccessible, implement appropriate
functions, and associate an object of the class with a window using
wxWindow::SetAccessible.
All functions return an indication of success, failure, or not implemented
using values of the wxAccStatus enum type.
If you return @c wxACC_NOT_IMPLEMENTED from any function, the system will try
to implement the appropriate functionality. However this will not work with
all functions.
Most functions work with an object @e id, which can be zero to refer to
'this' UI element, or greater than zero to refer to the nth child element.
This allows you to specify elements that don't have a corresponding wxWindow or
wxAccessible; for example, the sash of a splitter window.
For details on the semantics of functions and types, please refer to the
Microsoft Active Accessibility 1.2 documentation.
This class is compiled into wxWidgets only if the wxUSE_ACCESSIBILITY setup
symbol is set to 1.
@onlyfor{wxmsw}
@library{wxcore}
@category{misc}
@see @sample{access}
*/
class wxAccessible : public wxObject
{
public:
/**
Constructor, taking an optional window. The object can be associated with
a window later.
*/
wxAccessible(wxWindow* win = NULL);
/**
Destructor.
*/
~wxAccessible();
/**
Performs the default action for the object.
@a childId is 0 (the action for this object) or greater than 0 (the action
for a child).
@return wxACC_NOT_SUPPORTED if there is no default action for this
window (e.g. an edit control).
*/
virtual wxAccStatus DoDefaultAction(int childId);
/**
Gets the specified child (starting from 1). If @a child is @NULL and the return
value is wxACC_OK, this means that the child is a simple element and not an
accessible object.
*/
virtual wxAccStatus GetChild(int childId, wxAccessible** child);
/**
Returns the number of children in @a childCount.
*/
virtual wxAccStatus GetChildCount(int* childCount);
/**
Gets the default action for this object (0) or a child (greater than 0).
Return wxACC_OK even if there is no action. @a actionName is the action, or the
empty string if there is no action. The retrieved string describes the action that is
performed on an object, not what the object does as a result. For example, a toolbar
button that prints a document has a default action of "Press" rather than "Prints
the current document."
*/
virtual wxAccStatus GetDefaultAction(int childId,
wxString* actionName);
/**
Returns the description for this object or a child.
*/
virtual wxAccStatus GetDescription(int childId,
wxString* description);
/**
Gets the window with the keyboard focus. If childId is 0 and child is @NULL, no
object in this subhierarchy has the focus. If this object has the focus, child
should be 'this'.
*/
virtual wxAccStatus GetFocus(int* childId, wxAccessible** child);
/**
Returns help text for this object or a child, similar to tooltip text.
*/
virtual wxAccStatus GetHelpText(int childId, wxString* helpText);
/**
Returns the keyboard shortcut for this object or child.
Returns e.g. ALT+K.
*/
virtual wxAccStatus GetKeyboardShortcut(int childId,
wxString* shortcut);
/**
Returns the rectangle for this object (id is 0) or a child element (id is
greater than 0).
@a rect is in screen coordinates.
*/
virtual wxAccStatus GetLocation(wxRect& rect, int elementId);
/**
Gets the name of the specified object.
*/
virtual wxAccStatus GetName(int childId, wxString* name);
/**
Returns the parent of this object, or @NULL.
*/
virtual wxAccStatus GetParent(wxAccessible** parent);
/**
Returns a role constant describing this object. See wxAccRole for a list
of these roles.
*/
virtual wxAccStatus GetRole(int childId, wxAccRole* role);
/**
Gets a variant representing the selected children of this object.
Acceptable values are:
@li a null variant (IsNull() returns @true)
@li a list variant (GetType() == wxT("list"))
@li an integer representing the selected child element,
or 0 if this object is selected (GetType() == wxT("long"))
@li a "void*" pointer to a wxAccessible child object
*/
virtual wxAccStatus GetSelections(wxVariant* selections);
/**
Returns a state constant. See wxAccStatus for a list of these states.
*/
virtual wxAccStatus GetState(int childId, long* state);
/**
Returns a localized string representing the value for the object
or child.
*/
virtual wxAccStatus GetValue(int childId, wxString* strValue);
/**
Returns the window associated with this object.
*/
wxWindow* GetWindow();
/**
Returns a status value and object id to indicate whether the given point
was on this or a child object. Can return either a child object, or an
integer representing the child element, starting from 1.
@a pt is in screen coordinates.
*/
virtual wxAccStatus HitTest(const wxPoint& pt, int* childId,
wxAccessible** childObject);
/**
Navigates from @a fromId to @a toId or to @a toObject.
*/
virtual wxAccStatus Navigate(wxNavDir navDir, int fromId,
int* toId,
wxAccessible** toObject);
/**
Allows the application to send an event when something changes in
an accessible object.
*/
virtual static void NotifyEvent(int eventType, wxWindow* window,
wxAccObject objectType,
int objectType);
/**
Selects the object or child. See wxAccSelectionFlags for a list
of the selection actions.
*/
virtual wxAccStatus Select(int childId,
wxAccSelectionFlags selectFlags);
/**
Sets the window associated with this object.
*/
void SetWindow(wxWindow* window);
};
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