### Class

# Atk NoOpObject

#### Description [src]

    class Atk.NoOpObject : Atk.Object
      implements Atk.Action, Atk.Component, Atk.Document, Atk.EditableText, Atk.Hypertext, Atk.Image, Atk.Selection, Atk.Table, Atk.TableCell, Atk.Text, Atk.Value, Atk.Window {
      /* No available fields */
    }

An AtkObject which purports to implement all ATK interfaces.

An AtkNoOpObject is an AtkObject which purports to implement all ATK interfaces. It is the type of AtkObject which is created if an accessible object is requested for an object type for which no factory type is specified.

#### Ancestors

- AtkObject
- GObject

#### Implements

- AtkAction
- AtkComponent
- AtkDocument
- AtkEditableText
- AtkHypertext
- AtkImage
- AtkSelection
- AtkTable
- AtkTableCell
- AtkText
- AtkValue
- AtkWindow

#### Constructors

###### atk_no_op_object_new

Provides a default (non-functioning stub) `AtkObject`. Application maintainers should not use this method.

#### Instance methods

##### Methods inherited from AtkObject (28)

Please see AtkObject for a full list of methods.

##### Methods inherited from GObject (43)

Please see GObject for a full list of methods.

##### Methods inherited from AtkAction (7)

###### atk_action_do_action

Perform the specified action on the object.

###### atk_action_get_description

Returns a description of the specified action of the object.

###### atk_action_get_keybinding

Gets the keybinding which can be used to activate this action, if one exists. The string returned should contain localized, human-readable, key sequences as they would appear when displayed on screen. It must be in the format “mnemonic;sequence;shortcut”.

###### atk_action_get_localized_name

Returns the localized name of the specified action of the object.

###### atk_action_get_n_actions

Gets the number of accessible actions available on the object. If there are more than one, the first one is considered the “default” action of the object.

###### atk_action_get_name

Returns a non-localized string naming the specified action of the object. This name is generally not descriptive of the end result of the action, but instead names the ‘interaction type’ which the object supports. By convention, the above strings should be used to represent the actions which correspond to the common point-and-click interaction techniques of the same name: i.e. “click”, “press”, “release”, “drag”, “drop”, “popup”, etc. The “popup” action should be used to pop up a context menu for the object, if one exists.

###### atk_action_set_description

Sets a description of the specified action of the object.

##### Methods inherited from AtkComponent (16)

###### atk_component_add_focus_handler

Add the specified handler to the set of functions to be called when this object receives focus events (in or out). If the handler is already added it is not added again.

deprecated: 2.9.4

###### atk_component_contains

Checks whether the specified point is within the extent of the `component`.

###### atk_component_get_alpha

Returns the alpha value (i.e. the opacity) for this `component`, on a scale from 0 (fully transparent) to 1.0 (fully opaque).

since: 1.12

###### atk_component_get_extents

Gets the rectangle which gives the extent of the `component`.

###### atk_component_get_layer

Gets the layer of the component.

###### atk_component_get_mdi_zorder

Gets the zorder of the component. The value G_MININT will be returned if the layer of the component is not ATK_LAYER_MDI or ATK_LAYER_WINDOW.

###### atk_component_get_position

Gets the position of `component` in the form of a point specifying `component`‘s top-left corner.

deprecated: Unknown

###### atk_component_get_size

Gets the size of the `component` in terms of width and height.

deprecated: Unknown

###### atk_component_grab_focus

Grabs focus for this `component`.

###### atk_component_ref_accessible_at_point

Gets a reference to the accessible child, if one exists, at the coordinate point specified by `x` and `y`.

###### atk_component_remove_focus_handler

Remove the handler specified by `handler_id` from the list of functions to be executed when this object receives focus events (in or out).

deprecated: 2.9.4

###### atk_component_scroll_to

Makes `component` visible on the screen by scrolling all necessary parents.

since: 2.30

###### atk_component_scroll_to_point

Move the top-left of `component` to a given position of the screen by scrolling all necessary parents.

since: 2.30

###### atk_component_set_extents

Sets the extents of `component`.

###### atk_component_set_position

Sets the position of `component`.

###### atk_component_set_size

Set the size of the `component` in terms of width and height.

##### Methods inherited from AtkDocument (10)

###### atk_document_get_attribute_value

Retrieves the value of the given `attribute_name` inside `document`.

since: 1.12

###### atk_document_get_attributes

Gets an AtkAttributeSet which describes document-wide attributes as name-value pairs.

since: 1.12

###### atk_document_get_current_page_number

Retrieves the current page number inside `document`.

since: 2.12

###### atk_document_get_document

Gets a %gpointer that points to an instance of the DOM. It is up to the caller to check atk_document_get_type to determine how to cast this pointer.

deprecated: Unknown

###### atk_document_get_document_type

Gets a string indicating the document type.

deprecated: Unknown

###### atk_document_get_locale

Gets a UTF-8 string indicating the POSIX-style LC_MESSAGES locale of the content of this document instance. Individual text substrings or images within this document may have a different locale, see atk_text_get_attributes and atk_image_get_image_locale.

deprecated: 2.7.90

###### atk_document_get_page_count

Retrieves the total number of pages inside `document`.

since: 2.12

###### atk_document_get_text_selections

Returns an array of AtkTextSelections within this document.

since: 2.52

###### atk_document_set_attribute_value

Sets the value for the given `attribute_name` inside `document`.

since: 1.12

###### atk_document_set_text_selections

Makes 1 or more selections within this document denoted by the given array of AtkTextSelections. Any existing physical selection (inside or outside this document) is replaced by the new selections. All objects within the given selection ranges must be descendants of this document. Otherwise FALSE will be returned.

since: 2.52

##### Methods inherited from AtkEditableText (7)

###### atk_editable_text_copy_text

Copy text from `start_pos` up to, but not including `end_pos` to the clipboard.

###### atk_editable_text_cut_text

Copy text from `start_pos` up to, but not including `end_pos` to the clipboard and then delete from the widget.

###### atk_editable_text_delete_text

Delete text `start_pos` up to, but not including `end_pos`.

###### atk_editable_text_insert_text

Insert text at a given position.

###### atk_editable_text_paste_text

Paste text from clipboard to specified `position`.

###### atk_editable_text_set_run_attributes

Sets the attributes for a specified range. See the ATK_ATTRIBUTE macros (such as #ATK_ATTRIBUTE_LEFT_MARGIN) for examples of attributes that can be set. Note that other attributes that do not have corresponding ATK_ATTRIBUTE macros may also be set for certain text widgets.

###### atk_editable_text_set_text_contents

Set text contents of `text`.

##### Methods inherited from AtkHypertext (3)

###### atk_hypertext_get_link

Gets the link in this hypertext document at index `link_index`.

###### atk_hypertext_get_link_index

Gets the index into the array of hyperlinks that is associated with the character specified by `char_index`.

###### atk_hypertext_get_n_links

Gets the number of links within this hypertext document.

##### Methods inherited from AtkImage (5)

###### atk_image_get_image_description

Get a textual description of this image.

###### atk_image_get_image_locale

Retrieves the locale identifier associated to the `AtkImage`.

since: 1.12

###### atk_image_get_image_position

Gets the position of the image in the form of a point specifying the images top-left corner.

###### atk_image_get_image_size

Get the width and height in pixels for the specified image. The values of `width` and `height` are returned as -1 if the values cannot be obtained (for instance, if the object is not onscreen).

###### atk_image_set_image_description

Sets the textual description for this image.

##### Methods inherited from AtkSelection (7)

###### atk_selection_add_selection

Adds the specified accessible child of the object to the object’s selection.

###### atk_selection_clear_selection

Clears the selection in the object so that no children in the object are selected.

###### atk_selection_get_selection_count

Gets the number of accessible children currently selected. Note: callers should not rely on `NULL` or on a zero value for indication of whether AtkSelectionIface is implemented, they should use type checking/interface checking macros or the `atk_get_accessible_value()` convenience method.

###### atk_selection_is_child_selected

Determines if the current child of this object is selected Note: callers should not rely on `NULL` or on a zero value for indication of whether AtkSelectionIface is implemented, they should use type checking/interface checking macros or the `atk_get_accessible_value()` convenience method.

###### atk_selection_ref_selection

Gets a reference to the accessible object representing the specified selected child of the object. Note: callers should not rely on `NULL` or on a zero value for indication of whether AtkSelectionIface is implemented, they should use type checking/interface checking macros or the `atk_get_accessible_value()` convenience method.

###### atk_selection_remove_selection

Removes the specified child of the object from the object’s selection.

###### atk_selection_select_all_selection

Causes every child of the object to be selected if the object supports multiple selections.

##### Methods inherited from AtkTable (29)

Please see AtkTable for a full list of methods.

##### Methods inherited from AtkTableCell (7)

###### atk_table_cell_get_column_header_cells

Returns the column headers as an array of cell accessibles.

since: 2.12

###### atk_table_cell_get_column_span

Returns the number of columns occupied by this cell accessible.

since: 2.12

###### atk_table_cell_get_position

Retrieves the tabular position of this cell.

since: 2.12

###### atk_table_cell_get_row_column_span

Gets the row and column indexes and span of this cell accessible.

since: 2.12

###### atk_table_cell_get_row_header_cells

Returns the row headers as an array of cell accessibles.

since: 2.12

###### atk_table_cell_get_row_span

Returns the number of rows occupied by this cell accessible.

since: 2.12

###### atk_table_cell_get_table

Returns a reference to the accessible of the containing table.

since: 2.12

##### Methods inherited from AtkText (22)

###### atk_text_add_selection

Adds a selection bounded by the specified offsets.

###### atk_text_get_bounded_ranges

Get the ranges of text in the specified bounding box.

since: 1.3

###### atk_text_get_caret_offset

Gets the offset of the position of the caret (cursor).

###### atk_text_get_character_at_offset

Gets the specified text.

###### atk_text_get_character_count

Gets the character count.

###### atk_text_get_character_extents

If the extent can not be obtained (e.g. missing support), all of x, y, width, height are set to -1.

###### atk_text_get_default_attributes

Creates an `AtkAttributeSet` which consists of the default values of attributes for the text. See the enum AtkTextAttribute for types of text attributes that can be returned. Note that other attributes may also be returned.

###### atk_text_get_n_selections

Gets the number of selected regions.

###### atk_text_get_offset_at_point

Gets the offset of the character located at coordinates `x` and `y`. `x` and `y` are interpreted as being relative to the screen or this widget’s window depending on `coords`.

###### atk_text_get_range_extents

Get the bounding box for text within the specified range.

since: 1.3

###### atk_text_get_run_attributes

Creates an `AtkAttributeSet` which consists of the attributes explicitly set at the position `offset` in the text. `start_offset` and `end_offset` are set to the start and end of the range around `offset` where the attributes are invariant. Note that `end_offset` is the offset of the first character after the range. See the enum AtkTextAttribute for types of text attributes that can be returned. Note that other attributes may also be returned.

###### atk_text_get_selection

Gets the text from the specified selection.

###### atk_text_get_string_at_offset

Gets a portion of the text exposed through an `AtkText` according to a given `offset` and a specific `granularity`, along with the start and end offsets defining the boundaries of such a portion of text.

since: 2.10

###### atk_text_get_text

Gets the specified text.

###### atk_text_get_text_after_offset

Gets the specified text.

deprecated: 2.9.3

###### atk_text_get_text_at_offset

Gets the specified text.

deprecated: Unknown

###### atk_text_get_text_before_offset

Gets the specified text.

deprecated: 2.9.3

###### atk_text_remove_selection

Removes the specified selection.

###### atk_text_scroll_substring_to

Makes a substring of `text` visible on the screen by scrolling all necessary parents.

since: 2.32

###### atk_text_scroll_substring_to_point

Move the top-left of a substring of `text` to a given position of the screen by scrolling all necessary parents.

since: 2.32

###### atk_text_set_caret_offset

Sets the caret (cursor) position to the specified `offset`.

###### atk_text_set_selection

Changes the start and end offset of the specified selection.

##### Methods inherited from AtkValue (10)

###### atk_value_get_current_value

Gets the value of this object.

deprecated: Unknown

###### atk_value_get_increment

Gets the minimum increment by which the value of this object may be changed. If zero, the minimum increment is undefined, which may mean that it is limited only by the floating point precision of the platform.

since: 2.12

###### atk_value_get_maximum_value

Gets the maximum value of this object.

deprecated: Unknown

###### atk_value_get_minimum_increment

Gets the minimum increment by which the value of this object may be changed. If zero, the minimum increment is undefined, which may mean that it is limited only by the floating point precision of the platform.

deprecated: Unknown since: 1.12

###### atk_value_get_minimum_value

Gets the minimum value of this object.

deprecated: Unknown

###### atk_value_get_range

Gets the range of this object.

since: 2.12

###### atk_value_get_sub_ranges

Gets the list of subranges defined for this object. See `AtkValue` introduction for examples of subranges and when to expose them.

since: 2.12

###### atk_value_get_value_and_text

Gets the current value and the human readable text alternative of `obj`. `text` is a newly created string, that must be freed by the caller. Can be NULL if no descriptor is available.

since: 2.12

###### atk_value_set_current_value

Sets the value of this object.

deprecated: Unknown

###### atk_value_set_value

Sets the value of this object.

since: 2.12

#### Properties

##### Properties inherited from AtkObject (17)

###### Atk.Object:accessible-component-layer

No description available.

###### Atk.Object:accessible-component-mdi-zorder

No description available.

###### Atk.Object:accessible-description

No description available.

###### Atk.Object:accessible-help-text

No description available.

###### Atk.Object:accessible-hypertext-nlinks

No description available.

###### Atk.Object:accessible-id

No description available.

###### Atk.Object:accessible-name

No description available.

###### Atk.Object:accessible-parent

No description available.

###### Atk.Object:accessible-role

No description available.

###### Atk.Object:accessible-table-caption

Table caption.

deprecated: Unknown

###### Atk.Object:accessible-table-caption-object

No description available.

###### Atk.Object:accessible-table-column-description

Accessible table column description.

deprecated: Unknown

###### Atk.Object:accessible-table-column-header

Accessible table column header.

deprecated: Unknown

###### Atk.Object:accessible-table-row-description

Accessible table row description.

deprecated: Unknown

###### Atk.Object:accessible-table-row-header

Accessible table row header.

deprecated: Unknown

###### Atk.Object:accessible-table-summary

No description available.

###### Atk.Object:accessible-value

Numeric value of this object, in case being and AtkValue.

deprecated: Unknown

#### Signals

##### Signals inherited from AtkObject (9)

###### AtkObject::active-descendant-changed

The “active-descendant-changed” signal is emitted by an object which has the state ATK_STATE_MANAGES_DESCENDANTS when the focus object in the object changes. For instance, a table will emit the signal when the cell in the table which has focus changes.

###### AtkObject::announcement

The “announcement” signal can be emitted to pass an announcement on to be read by a screen reader.

since: 2.46

###### AtkObject::attribute-changed

The “attribute-changed” signal should be emitted when one of an object’s attributes changes.

since: 2.52

###### AtkObject::children-changed

The signal “children-changed” is emitted when a child is added or removed from an object. It supports two details: “add” and “remove”.

###### AtkObject::focus-event

The signal “focus-event” is emitted when an object gained or lost focus.

deprecated: 2.9.4

###### AtkObject::notification

The “notification” signal can be emitted to pass an announcement on to be read by a screen reader.

since: 2.50

###### AtkObject::property-change

The signal “property-change” is emitted when an object’s property value changes. `arg1` contains an `AtkPropertyValues` with the name and the new value of the property whose value has changed. Note that, as with GObject notify, getting this signal does not guarantee that the value of the property has actually changed; it may also be emitted when the setter of the property is called to reinstate the previous value.

###### AtkObject::state-change

The “state-change” signal is emitted when an object’s state changes. The detail value identifies the state type which has changed.

###### AtkObject::visible-data-changed

The “visible-data-changed” signal is emitted when the visual appearance of the object changed.

##### Signals inherited from GObject (1)

###### GObject::notify

The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.

##### Signals inherited from AtkComponent (1)

###### AtkComponent::bounds-changed

The ‘bounds-changed” signal is emitted when the position or size of the component changes.

##### Signals inherited from AtkDocument (5)

###### AtkDocument::document-attribute-changed

The “document-attribute-changed” signal should be emitted when there is a change to one of the document attributes returned by atk_document_get_attributes.

since: 2.52

###### AtkDocument::load-complete

The ‘load-complete’ signal is emitted when a pending load of a static document has completed. This signal is to be expected by ATK clients if and when AtkDocument implementors expose ATK_STATE_BUSY. If the state of an AtkObject which implements AtkDocument does not include ATK_STATE_BUSY, it should be safe for clients to assume that the AtkDocument’s static contents are fully loaded into the container. (Dynamic document contents should be exposed via other signals.).

###### AtkDocument::load-stopped

The ‘load-stopped’ signal is emitted when a pending load of document contents is cancelled, paused, or otherwise interrupted by the user or application logic. It should not however be emitted while waiting for a resource (for instance while blocking on a file or network read) unless a user-significant timeout has occurred.

###### AtkDocument::page-changed

The ‘page-changed’ signal is emitted when the current page of a document changes, e.g. pressing page up/down in a document viewer.

since: 2.12

###### AtkDocument::reload

The ‘reload’ signal is emitted when the contents of a document is refreshed from its source. Once ‘reload’ has been emitted, a matching ‘load-complete’ or ‘load-stopped’ signal should follow, which clients may await before interrogating ATK for the latest document content.

##### Signals inherited from AtkHypertext (1)

###### AtkHypertext::link-selected

The “link-selected” signal is emitted by an AtkHyperText object when one of the hyperlinks associated with the object is selected.

##### Signals inherited from AtkSelection (1)

###### AtkSelection::selection-changed

The “selection-changed” signal is emitted by an object which implements AtkSelection interface when the selection changes.

##### Signals inherited from AtkTable (7)

###### AtkTable::column-deleted

The “column-deleted” signal is emitted by an object which implements the AtkTable interface when a column is deleted.

###### AtkTable::column-inserted

The “column-inserted” signal is emitted by an object which implements the AtkTable interface when a column is inserted.

###### AtkTable::column-reordered

The “column-reordered” signal is emitted by an object which implements the AtkTable interface when the columns are reordered.

###### AtkTable::model-changed

The “model-changed” signal is emitted by an object which implements the AtkTable interface when the model displayed by the table changes.

###### AtkTable::row-deleted

The “row-deleted” signal is emitted by an object which implements the AtkTable interface when a row is deleted.

###### AtkTable::row-inserted

The “row-inserted” signal is emitted by an object which implements the AtkTable interface when a row is inserted.

###### AtkTable::row-reordered

The “row-reordered” signal is emitted by an object which implements the AtkTable interface when the rows are reordered.

##### Signals inherited from AtkText (6)

###### AtkText::text-attributes-changed

The “text-attributes-changed” signal is emitted when the text attributes of the text of an object which implements AtkText changes.

###### AtkText::text-caret-moved

The “text-caret-moved” signal is emitted when the caret position of the text of an object which implements AtkText changes.

###### AtkText::text-changed

The “text-changed” signal is emitted when the text of the object which implements the AtkText interface changes, This signal will have a detail which is either “insert” or “delete” which identifies whether the text change was an insertion or a deletion.

deprecated: 2.9.4

###### AtkText::text-insert

The “text-insert” signal is emitted when a new text is inserted. If the signal was not triggered by the user (e.g. typing or pasting text), the “system” detail should be included.

###### AtkText::text-remove

The “text-remove” signal is emitted when a new text is removed. If the signal was not triggered by the user (e.g. typing or pasting text), the “system” detail should be included.

###### AtkText::text-selection-changed

The “text-selection-changed” signal is emitted when the selected text of an object which implements AtkText changes.

##### Signals inherited from AtkValue (1)

###### AtkValue::value-changed

The ‘value-changed’ signal is emitted when the current value that represent the object changes. `value` is the numerical representation of this new value. `text` is the human readable text alternative of `value`, and can be NULL if it is not available. Note that if there is a textual description associated with the new numeric value, that description should be included regardless of whether or not it has also changed.

since: 2.12

##### Signals inherited from AtkWindow (9)

###### AtkWindow::activate

The signal `AtkWindow::activate` is emitted when a window becomes the active window of the application or session.

since: 2.2

###### AtkWindow::create

The signal `AtkWindow::create` is emitted when a new window is created.

since: 2.2

###### AtkWindow::deactivate

The signal `AtkWindow::deactivate` is emitted when a window is no longer the active window of the application or session.

since: 2.2

###### AtkWindow::destroy

The signal `AtkWindow::destroy` is emitted when a window is destroyed.

since: 2.2

###### AtkWindow::maximize

The signal `AtkWindow::maximize` is emitted when a window is maximized.

since: 2.2

###### AtkWindow::minimize

The signal `AtkWindow::minimize` is emitted when a window is minimized.

since: 2.2

###### AtkWindow::move

The signal `AtkWindow::move` is emitted when a window is moved.

since: 2.2

###### AtkWindow::resize

The signal `AtkWindow::resize` is emitted when a window is resized.

since: 2.2

###### AtkWindow::restore

The signal `AtkWindow::restore` is emitted when a window is restored.

since: 2.2

#### Class structure

    struct AtkNoOpObjectClass {
      AtkObjectClass parent_class;

    }

No description available.

###### Class members

`parent_class: AtkObjectClass`

  No description available.