### Class

# Gtk AboutDialog

since: 4.0

#### Description [src]

    final class Gtk.AboutDialog : Gtk.Window
      implements Gtk.Accessible, Gtk.Buildable, Gtk.ConstraintTarget, Gtk.Native, Gtk.Root, Gtk.ShortcutManager {
      /* No available fields */
    }

The `GtkAboutDialog` offers a simple way to display information about a program.

The shown information includes the programs’ logo, name, copyright, website and license. It is also possible to give credits to the authors, documenters, translators and artists who have worked on the program.

An about dialog is typically opened when the user selects the `About` option from the `Help` menu. All parts of the dialog are optional.

About dialogs often contain links and email addresses. `GtkAboutDialog` displays these as clickable links. By default, it calls `gtk_file_launcher_launch()` when a user clicks one. The behaviour can be overridden with the `GtkAboutDialog::activate-link` signal.

To specify a person with an email address, use a string like `Edgar Allan Poe <edgar@poe.com>`. To specify a website with a title, use a string like `GTK team https://www.gtk.org`.

To make constructing a `GtkAboutDialog` as convenient as possible, you can use the function `gtk_show_about_dialog()` which constructs and shows a dialog and keeps it around so that it can be shown again.

Note that GTK sets a default title of `_("About %s")` on the dialog window (where `%s` is replaced by the name of the application, but in order to ensure proper translation of the title, applications should set the title property explicitly when constructing a `GtkAboutDialog`, as shown in the following example:

    GFile *logo_file = g_file_new_for_path ("./logo.png");
    GdkTexture *example_logo = gdk_texture_new_from_file (logo_file, NULL);
    g_object_unref (logo_file);

    gtk_show_about_dialog (NULL,
                           "program-name", "ExampleCode",
                           "logo", example_logo,
                           "title", _("About ExampleCode"),
                           NULL);

## CSS nodes

`GtkAboutDialog` has a single CSS node with the name `window` and style class `.aboutdialog`.

Available since: 4.0

#### Ancestors

- GtkWindow
- GtkWidget
- GInitiallyUnowned
- GObject

#### Implements

- GtkAccessible
- GtkBuildable
- GtkConstraintTarget
- GtkNative
- GtkRoot
- GtkShortcutManager

#### Constructors

###### gtk_about_dialog_new

Creates a new `GtkAboutDialog`.

since: 4.0

#### Instance methods

###### gtk_about_dialog_add_credit_section

Creates a new section in the “Credits” page.

since: 4.0

###### gtk_about_dialog_get_artists

Returns the names of the artists which are displayed in the credits page.

since: 4.0

###### gtk_about_dialog_get_authors

Returns the names of the authors which are displayed in the credits page.

since: 4.0

###### gtk_about_dialog_get_comments

Returns the comments string.

since: 4.0

###### gtk_about_dialog_get_copyright

Returns the copyright string.

since: 4.0

###### gtk_about_dialog_get_documenters

Returns the name of the documenters which are displayed in the credits page.

since: 4.0

###### gtk_about_dialog_get_license

Returns the license information.

since: 4.0

###### gtk_about_dialog_get_license_type

Retrieves the license type.

since: 4.0

###### gtk_about_dialog_get_logo

Returns the paintable displayed as logo in the about dialog.

since: 4.0

###### gtk_about_dialog_get_logo_icon_name

Returns the icon name displayed as logo in the about dialog.

since: 4.0

###### gtk_about_dialog_get_program_name

Returns the program name displayed in the about dialog.

since: 4.0

###### gtk_about_dialog_get_system_information

Returns the system information that is shown in the about dialog.

since: 4.0

###### gtk_about_dialog_get_translator_credits

Returns the translator credits string which is displayed in the credits page.

since: 4.0

###### gtk_about_dialog_get_version

Returns the version string.

since: 4.0

###### gtk_about_dialog_get_website

Returns the website URL.

since: 4.0

###### gtk_about_dialog_get_website_label

Returns the label used for the website link.

since: 4.0

###### gtk_about_dialog_get_wrap_license

Returns whether the license text in the about dialog is automatically wrapped.

since: 4.0

###### gtk_about_dialog_set_artists

Sets the names of the artists to be displayed in the “Credits” page.

since: 4.0

###### gtk_about_dialog_set_authors

Sets the names of the authors which are displayed in the “Credits” page of the about dialog.

since: 4.0

###### gtk_about_dialog_set_comments

Sets the comments string to display in the about dialog.

since: 4.0

###### gtk_about_dialog_set_copyright

Sets the copyright string to display in the about dialog.

since: 4.0

###### gtk_about_dialog_set_documenters

Sets the names of the documenters which are displayed in the “Credits” page.

since: 4.0

###### gtk_about_dialog_set_license

Sets the license information to be displayed in the about dialog.

since: 4.0

###### gtk_about_dialog_set_license_type

Sets the license of the application showing the about dialog from a list of known licenses.

since: 4.0

###### gtk_about_dialog_set_logo

Sets the logo in the about dialog.

since: 4.0

###### gtk_about_dialog_set_logo_icon_name

Sets the icon name to be displayed as logo in the about dialog.

since: 4.0

###### gtk_about_dialog_set_program_name

Sets the name to display in the about dialog.

since: 4.0

###### gtk_about_dialog_set_system_information

Sets the system information to be displayed in the about dialog.

since: 4.0

###### gtk_about_dialog_set_translator_credits

Sets the translator credits string which is displayed in the credits page.

since: 4.0

###### gtk_about_dialog_set_version

Sets the version string to display in the about dialog.

since: 4.0

###### gtk_about_dialog_set_website

Sets the URL to use for the website link.

since: 4.0

###### gtk_about_dialog_set_website_label

Sets the label to be used for the website link.

since: 4.0

###### gtk_about_dialog_set_wrap_license

Sets whether the license text in the about dialog should be automatically wrapped.

since: 4.0

##### Methods inherited from GtkWindow (55)

Please see GtkWindow for a full list of methods.

##### Methods inherited from GtkWidget (162)

Please see GtkWidget for a full list of methods.

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

Please see GObject for a full list of methods.

##### Methods inherited from GtkAccessible (19)

###### gtk_accessible_announce

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

since: 4.14

###### gtk_accessible_get_accessible_parent

Retrieves the accessible parent for an accessible object.

since: 4.10

###### gtk_accessible_get_accessible_role

Retrieves the accessible role of an accessible object.

since: 4.0

###### gtk_accessible_get_at_context

Retrieves the accessible implementation for the given `GtkAccessible`.

since: 4.10

###### gtk_accessible_get_bounds

Queries the coordinates and dimensions of this accessible.

since: 4.10

###### gtk_accessible_get_first_accessible_child

Retrieves the first accessible child of an accessible object.

since: 4.10

###### gtk_accessible_get_next_accessible_sibling

Retrieves the next accessible sibling of an accessible object.

since: 4.10

###### gtk_accessible_get_platform_state

Query a platform state, such as focus.

since: 4.10

###### gtk_accessible_reset_property

Resets the accessible `property` to its default value.

since: 4.0

###### gtk_accessible_reset_relation

Resets the accessible `relation` to its default value.

since: 4.0

###### gtk_accessible_reset_state

Resets the accessible `state` to its default value.

since: 4.0

###### gtk_accessible_set_accessible_parent

Sets the parent and sibling of an accessible object.

since: 4.10

###### gtk_accessible_update_next_accessible_sibling

Updates the next accessible sibling of `self`.

since: 4.10

###### gtk_accessible_update_property

Updates a list of accessible properties.

since: 4.0

###### gtk_accessible_update_property_value

Updates an array of accessible properties.

since: 4.0

###### gtk_accessible_update_relation

Updates a list of accessible relations.

since: 4.0

###### gtk_accessible_update_relation_value

Updates an array of accessible relations.

since: 4.0

###### gtk_accessible_update_state

Updates a list of accessible states. See the `GtkAccessibleState` documentation for the value types of accessible states.

since: 4.0

###### gtk_accessible_update_state_value

Updates an array of accessible states.

since: 4.0

##### Methods inherited from GtkBuildable (1)

###### gtk_buildable_get_buildable_id

Gets the ID of the `buildable` object.

since: 4.0

##### Methods inherited from GtkNative (5)

###### gtk_native_get_renderer

Returns the renderer that is used for this `GtkNative`.

since: 4.0

###### gtk_native_get_surface

Returns the surface of this `GtkNative`.

since: 4.0

###### gtk_native_get_surface_transform

Retrieves the surface transform of `self`.

since: 4.0

###### gtk_native_realize

Realizes a `GtkNative`.

since: 4.0

###### gtk_native_unrealize

Unrealizes a `GtkNative`.

since: 4.0

##### Methods inherited from GtkRoot (3)

###### gtk_root_get_display

Returns the display that this `GtkRoot` is on.

since: 4.0

###### gtk_root_get_focus

Retrieves the current focused widget within the root.

since: 4.0

###### gtk_root_set_focus

If `focus` is not the current focus widget, and is focusable, sets it as the focus widget for the root.

since: 4.0

#### Properties

###### Gtk.AboutDialog:artists

The people who contributed artwork to the program, as a `NULL`-terminated array of strings.

since: 4.0

###### Gtk.AboutDialog:authors

The authors of the program, as a `NULL`-terminated array of strings.

since: 4.0

###### Gtk.AboutDialog:comments

Comments about the program.

since: 4.0

###### Gtk.AboutDialog:copyright

Copyright information for the program.

since: 4.0

###### Gtk.AboutDialog:documenters

The people documenting the program, as a `NULL`-terminated array of strings.

since: 4.0

###### Gtk.AboutDialog:license

The license of the program, as free-form text.

since: 4.0

###### Gtk.AboutDialog:license-type

The license of the program.

since: 4.0

###### Gtk.AboutDialog:logo

A logo for the about box.

since: 4.0

###### Gtk.AboutDialog:logo-icon-name

A named icon to use as the logo for the about box.

since: 4.0

###### Gtk.AboutDialog:program-name

The name of the program.

since: 4.0

###### Gtk.AboutDialog:system-information

Information about the system on which the program is running.

since: 4.0

###### Gtk.AboutDialog:translator-credits

Credits to the translators.

since: 4.0

###### Gtk.AboutDialog:version

The version of the program.

since: 4.0

###### Gtk.AboutDialog:website

The URL for the link to the website of the program.

since: 4.0

###### Gtk.AboutDialog:website-label

The label for the link to the website of the program.

since: 4.0

###### Gtk.AboutDialog:wrap-license

Whether to wrap the text in the license dialog.

since: 4.0

##### Properties inherited from GtkWindow (25)

###### Gtk.Window:application

The `GtkApplication` associated with the window.

since: 4.0

###### Gtk.Window:child

The child widget.

since: 4.0

###### Gtk.Window:decorated

Whether the window should have a frame (also known as decorations).

since: 4.0

###### Gtk.Window:default-height

The default height of the window.

since: 4.0

###### Gtk.Window:default-widget

The default widget.

since: 4.0

###### Gtk.Window:default-width

The default width of the window.

since: 4.0

###### Gtk.Window:deletable

Whether the window frame should have a close button.

since: 4.0

###### Gtk.Window:destroy-with-parent

If this window should be destroyed when the parent is destroyed.

since: 4.0

###### Gtk.Window:display

The display that will display this window.

since: 4.0

###### Gtk.Window:focus-visible

Whether ‘focus rectangles’ are currently visible in this window.

since: 4.0

###### Gtk.Window:focus-widget

The focus widget.

since: 4.0

###### Gtk.Window:fullscreened

Whether the window is fullscreen.

since: 4.0

###### Gtk.Window:handle-menubar-accel

Whether the window frame should handle F10 for activating menubars.

since: 4.2

###### Gtk.Window:hide-on-close

If this window should be hidden when the users clicks the close button.

since: 4.0

###### Gtk.Window:icon-name

Specifies the name of the themed icon to use as the window icon.

since: 4.0

###### Gtk.Window:is-active

Whether the toplevel is the currently active window.

since: 4.0

###### Gtk.Window:maximized

Whether the window is maximized.

since: 4.0

###### Gtk.Window:mnemonics-visible

Whether mnemonics are currently visible in this window.

since: 4.0

###### Gtk.Window:modal

If `TRUE`, the window is modal.

since: 4.0

###### Gtk.Window:resizable

If `TRUE`, users can resize the window.

since: 4.0

###### Gtk.Window:startup-id

A write-only property for setting window’s startup notification identifier.

since: 4.0

###### Gtk.Window:suspended

Whether the window is suspended.

since: 4.12

###### Gtk.Window:title

The title of the window.

since: 4.0

###### Gtk.Window:titlebar

The titlebar widget.

since: 4.6

###### Gtk.Window:transient-for

The transient parent of the window.

since: 4.0

##### Properties inherited from GtkWidget (34)

###### Gtk.Widget:can-focus

Whether the widget or any of its descendents can accept the input focus.

since: 4.0

###### Gtk.Widget:can-target

Whether the widget can receive pointer events.

since: 4.0

###### Gtk.Widget:css-classes

A list of css classes applied to this widget.

since: 4.0

###### Gtk.Widget:css-name

The name of this widget in the CSS tree.

since: 4.0

###### Gtk.Widget:cursor

The cursor used by `widget`.

since: 4.0

###### Gtk.Widget:focus-on-click

Whether the widget should grab focus when it is clicked with the mouse.

since: 4.0

###### Gtk.Widget:focusable

Whether this widget itself will accept the input focus.

since: 4.0

###### Gtk.Widget:halign

How to distribute horizontal space if widget gets extra space.

since: 4.0

###### Gtk.Widget:has-default

Whether the widget is the default widget.

since: 4.0

###### Gtk.Widget:has-focus

Whether the widget has the input focus.

since: 4.0

###### Gtk.Widget:has-tooltip

Enables or disables the emission of the ::query-tooltip signal on `widget`.

since: 4.0

###### Gtk.Widget:height-request

Override for height request of the widget.

since: 4.0

###### Gtk.Widget:hexpand

Whether to expand horizontally.

since: 4.0

###### Gtk.Widget:hexpand-set

Whether to use the `hexpand` property.

since: 4.0

###### Gtk.Widget:layout-manager

The `GtkLayoutManager` instance to use to compute the preferred size of the widget, and allocate its children.

since: 4.0

###### Gtk.Widget:margin-bottom

Margin on bottom side of widget.

since: 4.0

###### Gtk.Widget:margin-end

Margin on end of widget, horizontally.

since: 4.0

###### Gtk.Widget:margin-start

Margin on start of widget, horizontally.

since: 4.0

###### Gtk.Widget:margin-top

Margin on top side of widget.

since: 4.0

###### Gtk.Widget:name

The name of the widget.

since: 4.0

###### Gtk.Widget:opacity

The requested opacity of the widget.

since: 4.0

###### Gtk.Widget:overflow

How content outside the widget’s content area is treated.

since: 4.0

###### Gtk.Widget:parent

The parent widget of this widget.

since: 4.0

###### Gtk.Widget:receives-default

Whether the widget will receive the default action when it is focused.

since: 4.0

###### Gtk.Widget:root

The `GtkRoot` widget of the widget tree containing this widget.

since: 4.0

###### Gtk.Widget:scale-factor

The scale factor of the widget.

since: 4.0

###### Gtk.Widget:sensitive

Whether the widget responds to input.

since: 4.0

###### Gtk.Widget:tooltip-markup

Sets the text of tooltip to be the given string, which is marked up with Pango markup.

since: 4.0

###### Gtk.Widget:tooltip-text

Sets the text of tooltip to be the given string.

since: 4.0

###### Gtk.Widget:valign

How to distribute vertical space if widget gets extra space.

since: 4.0

###### Gtk.Widget:vexpand

Whether to expand vertically.

since: 4.0

###### Gtk.Widget:vexpand-set

Whether to use the `vexpand` property.

since: 4.0

###### Gtk.Widget:visible

Whether the widget is visible.

since: 4.0

###### Gtk.Widget:width-request

Override for width request of the widget.

since: 4.0

##### Properties inherited from GtkAccessible (1)

###### GtkAccessible:accessible-role

The accessible role of the given `GtkAccessible` implementation.

since: 4.0

#### Signals

###### Gtk.AboutDialog::activate-link

Emitted every time a URL is activated.

since: 4.0

##### Signals inherited from GtkWindow (5)

###### GtkWindow::activate-default

Emitted when the user activates the default widget of `window`.

since: 4.0

###### GtkWindow::activate-focus

Emitted when the user activates the currently focused widget of `window`.

since: 4.0

###### GtkWindow::close-request

Emitted when the user clicks on the close button of the window.

since: 4.0

###### GtkWindow::enable-debugging

Emitted when the user enables or disables interactive debugging.

since: 4.0

###### GtkWindow::keys-changed

Emitted when the set of accelerators or mnemonics that are associated with `window` changes.

deprecated: 4.10 since: 4.0

##### Signals inherited from GtkWidget (13)

###### GtkWidget::destroy

Signals that all holders of a reference to the widget should release the reference that they hold.

since: 4.0

###### GtkWidget::direction-changed

Emitted when the text direction of a widget changes.

since: 4.0

###### GtkWidget::hide

Emitted when `widget` is hidden.

since: 4.0

###### GtkWidget::keynav-failed

Emitted if keyboard navigation fails.

since: 4.0

###### GtkWidget::map

Emitted when `widget` is going to be mapped.

since: 4.0

###### GtkWidget::mnemonic-activate

Emitted when a widget is activated via a mnemonic.

since: 4.0

###### GtkWidget::move-focus

Emitted when the focus is moved.

since: 4.0

###### GtkWidget::query-tooltip

Emitted when the widget’s tooltip is about to be shown.

since: 4.0

###### GtkWidget::realize

Emitted when `widget` is associated with a `GdkSurface`.

since: 4.0

###### GtkWidget::show

Emitted when `widget` is shown.

since: 4.0

###### GtkWidget::state-flags-changed

Emitted when the widget state changes.

since: 4.0

###### GtkWidget::unmap

Emitted when `widget` is going to be unmapped.

since: 4.0

###### GtkWidget::unrealize

Emitted when the `GdkSurface` associated with `widget` is destroyed.

since: 4.0

##### 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.

since: 2.0