gtkmm: Gtk::Accessible Class Reference

Accessible interface. More...

#include <gtkmm/accessible.h>

Inheritance diagram for Gtk::Accessible:

[legend]

Public Types
enum class	Role { Role::ALERT , Role::ALERT_DIALOG , Role::BANNER , Role::BUTTON , Role::CAPTION , Role::CELL , Role::CHECKBOX , Role::COLUMN_HEADER , Role::COMBO_BOX , Role::COMMAND , Role::COMPOSITE , Role::DIALOG , Role::DOCUMENT , Role::FEED , Role::FORM , Role::GENERIC , Role::GRID , Role::GRID_CELL , Role::GROUP , Role::HEADING , Role::IMG , Role::INPUT , Role::LABEL , Role::LANDMARK , Role::LEGEND , Role::LINK , Role::LIST , Role::LIST_BOX , Role::LIST_ITEM , Role::LOG , Role::MAIN , Role::MARQUEE , Role::MATH , Role::METER , Role::MENU , Role::MENU_BAR , Role::MENU_ITEM , Role::MENU_ITEM_CHECKBOX , Role::MENU_ITEM_RADIO , Role::NAVIGATION , Role::NONE , Role::NOTE , Role::OPTION , Role::PRESENTATION , Role::PROGRESS_BAR , Role::RADIO , Role::RADIO_GROUP , Role::RANGE , Role::REGION , Role::ROW , Role::ROW_GROUP , Role::ROW_HEADER , Role::SCROLLBAR , Role::SEARCH , Role::SEARCH_BOX , Role::SECTION , Role::SECTION_HEAD , Role::SELECT , Role::SEPARATOR , Role::SLIDER , Role::SPIN_BUTTON , Role::STATUS , Role::STRUCTURE , Role::SWITCH , Role::TAB , Role::TABLE , Role::TAB_LIST , Role::TAB_PANEL , Role::TEXT_BOX , Role::TIME , Role::TIMER , Role::TOOLBAR , Role::TOOLTIP , Role::TREE , Role::TREE_GRID , Role::TREE_ITEM , Role::WIDGET , Role::WINDOW , Role::TOGGLE_BUTTON , Role::APPLICATION , Role::PARAGRAPH , Role::BLOCK_QUOTE , Role::ARTICLE , Role::COMMENT , Role::TERMINAL }
	The accessible role for a Gtk::Accessible implementation. More...

enum class	State { State::BUSY , State::CHECKED , State::DISABLED , State::EXPANDED , State::HIDDEN , State::INVALID , State::PRESSED , State::SELECTED , State::VISITED }
	The possible accessible states of a Gtk::Accessible. More...

enum class	Property { Property::AUTOCOMPLETE , Property::DESCRIPTION , Property::HAS_POPUP , Property::KEY_SHORTCUTS , Property::LABEL , Property::LEVEL , Property::MODAL , Property::MULTI_LINE , Property::MULTI_SELECTABLE , Property::ORIENTATION , Property::PLACEHOLDER , Property::READ_ONLY , Property::REQUIRED , Property::ROLE_DESCRIPTION , Property::SORT , Property::VALUE_MAX , Property::VALUE_MIN , Property::VALUE_NOW , Property::VALUE_TEXT , Property::HELP_TEXT }
	The possible accessible properties of a Gtk::Accessible. More...

enum class	Relation { Relation::ACTIVE_DESCENDANT , Relation::COL_COUNT , Relation::COL_INDEX , Relation::COL_INDEX_TEXT , Relation::COL_SPAN , Relation::CONTROLS , Relation::DESCRIBED_BY , Relation::DETAILS , Relation::ERROR_MESSAGE , Relation::FLOW_TO , Relation::LABELLED_BY , Relation::OWNS , Relation::POS_IN_SET , Relation::ROW_COUNT , Relation::ROW_INDEX , Relation::ROW_INDEX_TEXT , Relation::ROW_SPAN , Relation::SET_SIZE , Relation::LABEL_FOR , Relation::DESCRIPTION_FOR , Relation::CONTROLLED_BY , Relation::DETAILS_FOR , Relation::ERROR_MESSAGE_FOR , Relation::FLOW_FROM }
	The possible accessible relations of a Gtk::Accessible. More...

enum class	PlatformState { PlatformState::FOCUSABLE , PlatformState::FOCUSED , PlatformState::ACTIVE }
	The various platform states which can be queried using Gtk::Accessible::get_platform_state(). More...

enum class	AnnouncementPriority { AnnouncementPriority::LOW , AnnouncementPriority::MEDIUM , AnnouncementPriority::HIGH }
	The priority of an accessibility announcement. More...

Public Types inherited from sigc::trackable
typedef internal::func_destroy_notify	func_destroy_notify

Public Types inherited from sigc::notifiable
typedef internal::func_destroy_notify	func_destroy_notify

Public Member Functions
	Accessible (Accessible &&src) noexcept

Accessible &	operator= (Accessible &&src) noexcept

	~Accessible () noexcept override

GtkAccessible *	gobj ()
	Provides access to the underlying C GObject.

const GtkAccessible *	gobj () const
	Provides access to the underlying C GObject.

Glib::RefPtr< ATContext >	get_at_context ()
	Retrieves the implementation for the given accessible object.

Glib::RefPtr< const ATContext >	get_at_context () const
	Retrieves the implementation for the given accessible object.

bool	get_platform_state (PlatformState state) const
	Queries a platform state, such as focus.

void	update_platform_state (PlatformState state)
	Informs ATs that the platform state has changed.

Glib::RefPtr< Accessible >	get_accessible_parent ()
	Retrieves the accessible parent for an accessible object.

Glib::RefPtr< const Accessible >	get_accessible_parent () const
	Retrieves the accessible parent for an accessible object.

void	set_accessible_parent (const Glib::RefPtr< Accessible > & parent, const Glib::RefPtr< Accessible > & next_sibling)
	Sets the parent and sibling of an accessible object.

Glib::RefPtr< Accessible >	get_first_accessible_child ()
	Retrieves the first accessible child of an accessible object.

Glib::RefPtr< const Accessible >	get_first_accessible_child () const
	Retrieves the first accessible child of an accessible object.

Glib::RefPtr< Accessible >	get_next_accessible_sibling ()
	Retrieves the next accessible sibling of an accessible object.

Glib::RefPtr< const Accessible >	get_next_accessible_sibling () const
	Retrieves the next accessible sibling of an accessible object.

void	update_next_accessible_sibling (const Glib::RefPtr< Accessible > &new_sibling)
	Updates the next accessible sibling.

bool	get_bounds (int &x, int &y, int & width, int &height) const
	Queries the coordinates and dimensions of this accessible.

Role	get_accessible_role () const
	Retrieves the accessible role of an accessible object.

void	update_state (State state, const Glib::ValueBase & value)
	Updates an accessible state.

void	update_property (Property property, const Glib::ValueBase & value)
	Updates an accessible property.

void	update_relation (Relation relation, const Glib::ValueBase & value)
	Updates an accessible relation.

void	reset_state (State state)
	Resets the accessible state to its default value.

void	reset_property (Property property)
	Resets the accessible property to its default value.

void	reset_relation (Relation relation)
	Resets the accessible relation to its default value.

void	announce (const Glib::ustring & message, AnnouncementPriority priority)
	Requests the user's screen reader to announce the given message.

Glib::PropertyProxy< Role >	property_accessible_role ()
	The accessible role of the given `Gtk::Accessible` implementation.

Glib::PropertyProxy_ReadOnly< Role >	property_accessible_role () const
	The accessible role of the given `Gtk::Accessible` implementation.

Public Member Functions inherited from Glib::Interface
	Interface ()

	Interface (Interface &&src) noexcept

Interface &	operator= (Interface &&src) noexcept

	Interface (const Glib::Interface_Class &interface_class)

	Interface (GObject *castitem)

	~Interface () noexcept override

	Interface (const Interface &)=delete

Interface &	operator= (const Interface &)=delete

GObject *	gobj ()

const GObject *	gobj () const

Public Member Functions inherited from Glib::ObjectBase
	ObjectBase (const ObjectBase &)=delete

ObjectBase &	operator= (const ObjectBase &)=delete

void	set_property_value (const Glib::ustring &property_name, const Glib::ValueBase &value)

void	get_property_value (const Glib::ustring &property_name, Glib::ValueBase &value) const

void	set_property (const Glib::ustring &property_name, const PropertyType &value)

void	get_property (const Glib::ustring &property_name, PropertyType &value) const

PropertyType	get_property (const Glib::ustring &property_name) const

sigc::connection	connect_property_changed (const Glib::ustring &property_name, const sigc::slot< void()> &slot)

sigc::connection	connect_property_changed (const Glib::ustring &property_name, sigc::slot< void()> &&slot)

void	freeze_notify ()

void	thaw_notify ()

virtual void	reference () const

virtual void	unreference () const

GObject *	gobj ()

const GObject *	gobj () const

GObject *	gobj_copy () const

Public Member Functions inherited from sigc::trackable
	trackable () noexcept

	trackable (const trackable &src) noexcept

	trackable (trackable &&src) noexcept

	~trackable ()

void	add_destroy_notify_callback (notifiable *data, func_destroy_notify func) const

void	notify_callbacks ()

trackable &	operator= (const trackable &src)

trackable &	operator= (trackable &&src) noexcept

void	remove_destroy_notify_callback (notifiable *data) const

Static Public Member Functions
static void	add_interface (GType gtype_implementer)

static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system.

Protected Member Functions
	Accessible ()
	You should derive from this class to use it.

Protected Member Functions inherited from Glib::ObjectBase
	ObjectBase ()

	ObjectBase (const char *custom_type_name)

	ObjectBase (const std::type_info &custom_type_info)

	ObjectBase (ObjectBase &&src) noexcept

ObjectBase &	operator= (ObjectBase &&src) noexcept

virtual	~ObjectBase () noexcept=0

void	initialize (GObject *castitem)

void	initialize_move (GObject castitem, Glib::ObjectBase previous_wrapper)

Related Symbols
(Note that these are not member symbols.)
Glib::RefPtr< Gtk::Accessible >	wrap (GtkAccessible *object, bool take_copy=false)
	A Glib::wrap() method for this object.

Detailed Description

Accessible interface.

Gtk::Accessible provides an interface for describing a UI element, like a Gtk::Widget, in a way that can be consumed by Assistive Technologies, or “AT”. Every accessible implementation has:

a “role”, represented by a value of the Gtk::Accessible::Role enumeration
an “attribute”, represented by a set of Gtk::Accessible::State, Gtk::Accessible::Property and Gtk::Accessible::Relation values

The role cannot be changed after instantiating a Gtk::Accessible implementation.

The attributes are updated every time a UI element's state changes in a way that should be reflected by assistive technologies. For instance, if a Gtk::Widget visibility changes, the Gtk::Accessible::State::HIDDEN state will also change to reflect Gtk::Widget::property_visible().

Since gtkmm 3.98:

Constructor & Destructor Documentation

◆ Accessible() [1/2]

Gtk::Accessible::Accessible ( )

protected

You should derive from this class to use it.

◆ Accessible() [2/2]

Gtk::Accessible::Accessible ( Accessible && src )

noexcept

◆ ~Accessible()

Gtk::Accessible::~Accessible ( )

overridenoexcept

Member Function Documentation

◆ add_interface()

static void Gtk::Accessible::add_interface ( GType gtype_implementer )

static

◆ announce()

void Gtk::Accessible::announce	(	const Glib::ustring &	message,
		AnnouncementPriority	priority
	)

Requests the user's screen reader to announce the given message.

This kind of notification is useful for messages that either have only a visual representation or that are not exposed visually at all, e.g. a notification about a successful operation.

Also, by using this API, you can ensure that the message does not interrupts the user's current screen reader output.

Since gtkmm 4.14:

Parameters

message	The string to announce.
priority	The priority of the announcement.

◆ get_accessible_parent() [1/2]

Glib::RefPtr< Accessible > Gtk::Accessible::get_accessible_parent ( )

Retrieves the accessible parent for an accessible object.

This function returns nullptr for top level widgets.

Since gtkmm 4.10:

Returns: The accessible parent.

◆ get_accessible_parent() [2/2]

Glib::RefPtr< const Accessible > Gtk::Accessible::get_accessible_parent ( ) const

Retrieves the accessible parent for an accessible object.

This function returns nullptr for top level widgets.

Since gtkmm 4.10:

Returns: The accessible parent.

◆ get_accessible_role()

Role Gtk::Accessible::get_accessible_role ( ) const

Retrieves the accessible role of an accessible object.

Returns: The accessible role.

◆ get_at_context() [1/2]

Glib::RefPtr< ATContext > Gtk::Accessible::get_at_context ( )

Retrieves the implementation for the given accessible object.

Since gtkmm 4.10:

Returns: The accessible implementation object.

◆ get_at_context() [2/2]

Glib::RefPtr< const ATContext > Gtk::Accessible::get_at_context ( ) const

Retrieves the implementation for the given accessible object.

Since gtkmm 4.10:

Returns: The accessible implementation object.

◆ get_bounds()

bool Gtk::Accessible::get_bounds	(	int &	x,
		int &	y,
		int &	width,
		int &	height
	)		const

Queries the coordinates and dimensions of this accessible.

This functionality can be overridden by Gtk::Accessible implementations, e.g. to get the bounds from an ignored child widget.

Since gtkmm 4.10:

Parameters

x	The x coordinate of the top left corner of the accessible.
y	The y coordinate of the top left corner of the widget.
width	The width of the accessible object.
height	The height of the accessible object.

Returns: True if the bounds are valid, and false otherwise.

◆ get_first_accessible_child() [1/2]

Glib::RefPtr< Accessible > Gtk::Accessible::get_first_accessible_child ( )

Retrieves the first accessible child of an accessible object.

since: 4.10

Returns: The first accessible child.

◆ get_first_accessible_child() [2/2]

Glib::RefPtr< const Accessible > Gtk::Accessible::get_first_accessible_child ( ) const

Retrieves the first accessible child of an accessible object.

since: 4.10

Returns: The first accessible child.

◆ get_next_accessible_sibling() [1/2]

Glib::RefPtr< Accessible > Gtk::Accessible::get_next_accessible_sibling ( )

Retrieves the next accessible sibling of an accessible object.

since: 4.10

Returns: The next accessible sibling.

◆ get_next_accessible_sibling() [2/2]

Glib::RefPtr< const Accessible > Gtk::Accessible::get_next_accessible_sibling ( ) const

Retrieves the next accessible sibling of an accessible object.

since: 4.10

Returns: The next accessible sibling.

◆ get_platform_state()

bool Gtk::Accessible::get_platform_state ( PlatformState state ) const

Queries a platform state, such as focus.

This functionality can be overridden by Gtk::Accessible implementations, e.g. to get platform state from an ignored child widget, as is the case for Gtk::Text wrappers.

Since gtkmm 4.10:

Parameters

state Platform state to query.

Returns: The value of state for the accessible.

◆ get_type()

static GType Gtk::Accessible::get_type ( )

static

Get the GType for this class, for use with the underlying GObject type system.

◆ gobj() [1/2]

GtkAccessible * Gtk::Accessible::gobj ( )

inline

Provides access to the underlying C GObject.

◆ gobj() [2/2]

const GtkAccessible * Gtk::Accessible::gobj ( ) const

inline

Provides access to the underlying C GObject.

◆ operator=()

Accessible & Gtk::Accessible::operator= ( Accessible && src )

noexcept

◆ property_accessible_role() [1/2]

Glib::PropertyProxy< Role > Gtk::Accessible::property_accessible_role ( )

The accessible role of the given Gtk::Accessible implementation.

The accessible role cannot be changed once set.

Default value: Gtk::Accessible::Role::NONE

Returns: A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

◆ property_accessible_role() [2/2]

Glib::PropertyProxy_ReadOnly< Role > Gtk::Accessible::property_accessible_role ( ) const

The accessible role of the given Gtk::Accessible implementation.

The accessible role cannot be changed once set.

Default value: Gtk::Accessible::Role::NONE

Returns: A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

◆ reset_property()

void Gtk::Accessible::reset_property ( Property property )

Resets the accessible property to its default value.

Parameters

property The accessible property.

◆ reset_relation()

void Gtk::Accessible::reset_relation ( Relation relation )

Resets the accessible relation to its default value.

Parameters

relation The accessible relation.

◆ reset_state()

void Gtk::Accessible::reset_state ( State state )

Resets the accessible state to its default value.

Parameters

state The accessible state.

◆ set_accessible_parent()

void Gtk::Accessible::set_accessible_parent	(	const Glib::RefPtr< Accessible > &	parent,
		const Glib::RefPtr< Accessible > &	next_sibling
	)

Sets the parent and sibling of an accessible object.

This function is meant to be used by accessible implementations that are not part of the widget hierarchy, and but act as a logical bridge between widgets. For instance, if a widget creates an object that holds metadata for each child, and you want that object to implement the Gtk::Accessible interface, you will use this function to ensure that the parent of each child widget is the metadata object, and the parent of each metadata object is the container widget.

Since gtkmm 4.10:

Parameters

parent	The parent accessible object.
next_sibling	The sibling accessible object.

◆ update_next_accessible_sibling()

void Gtk::Accessible::update_next_accessible_sibling ( const Glib::RefPtr< Accessible > & new_sibling )

Updates the next accessible sibling.

That might be useful when a new child of a custom accessible is created, and it needs to be linked to a previous child.

Since gtkmm 4.10:

Parameters

new_sibling The new next accessible sibling to set.

◆ update_platform_state()

void Gtk::Accessible::update_platform_state ( PlatformState state )

Informs ATs that the platform state has changed.

This function should be used by Gtk::Accessible implementations that have a platform state but are not widgets. Widgets handle platform states automatically.

Since gtkmm 4.18:

Parameters

state The platform state to update.

◆ update_property()

void Gtk::Accessible::update_property	(	Property	property,
		const Glib::ValueBase &	value
	)

Updates an accessible property.

This function should be called by Gtk::Widget types whenever an accessible property change must be communicated to assistive technologies.

Parameters

property	A Gtk::Accessible::Property.
value	A Glib::ValueBase.

◆ update_relation()

void Gtk::Accessible::update_relation	(	Relation	relation,
		const Glib::ValueBase &	value
	)

Updates an accessible relation.

This function should be called by Gtk::Widget types whenever an accessible relation change must be communicated to assistive technologies.

Parameters

relation	A Gtk::Accessible::Relation.
value	A Glib::ValueBase.

◆ update_state()

void Gtk::Accessible::update_state	(	State	state,
		const Glib::ValueBase &	value
	)

Updates an accessible state.

This function should be called by Gtk::Widget types whenever an accessible state change must be communicated to assistive technologies.

Parameters

state	A Gtk::Accessible::State.
value	A Glib::ValueBase.

Friends And Related Symbol Documentation

◆ wrap()

Glib::RefPtr< Gtk::Accessible > wrap	(	GtkAccessible *	object,
		bool	take_copy = `false`
	)

A Glib::wrap() method for this object.

Parameters

object	The C instance.
take_copy	False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns: A C++ instance that wraps this C instance.

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Related Symbols

Detailed Description

Constructor & Destructor Documentation

◆ Accessible() [1/2]

◆ Accessible() [2/2]

◆ ~Accessible()

Member Function Documentation

◆ add_interface()

◆ announce()

◆ get_accessible_parent() [1/2]

◆ get_accessible_parent() [2/2]

◆ get_accessible_role()

◆ get_at_context() [1/2]

◆ get_at_context() [2/2]

◆ get_bounds()

◆ get_first_accessible_child() [1/2]

◆ get_first_accessible_child() [2/2]

◆ get_next_accessible_sibling() [1/2]

◆ get_next_accessible_sibling() [2/2]

◆ get_platform_state()

◆ get_type()

◆ gobj() [1/2]

◆ gobj() [2/2]

◆ operator=()

◆ property_accessible_role() [1/2]

◆ property_accessible_role() [2/2]

◆ reset_property()

◆ reset_relation()

◆ reset_state()

◆ set_accessible_parent()

◆ update_next_accessible_sibling()

◆ update_platform_state()

◆ update_property()

◆ update_relation()

◆ update_state()

Friends And Related Symbol Documentation

◆ wrap()