gtk:window, gtk:widget, gobject:initially-unowned, gtk:accessible, gtk:buildable, gtk:constraint-target, gtk:native, gtk:root, gtk:shortcut-manager, gobject:object, common-lisp:standard-object, common-lisp:t

None

The gtk:about-dialog widget offers a simple way to display information about a program like its 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. The about dialog is typically opened when the user selects the About option from the Help menu. All parts of the about dialog are optional.

Figure: GtkAboutDialog

The about dialog often contain links and email addresses. The about dialog displays these as clickable links. By default, it calls the gtk:file-launcher-launch function when a user clicks one. The behaviour can be overridden with the "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 an about dialog as convenient as possible, you can use the gtk:show-about-dialog function which constructs and shows an about dialog and keeps it around so that it can be shown again.

Note that GTK sets a default title of "About %s" on the about 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 gtk:about-dialog widget, as shown in the following example:

(gtk:show-about-dialog nil
                       :program-name "ExampleCode"
                       :logo example-logo
                       :title "About ExampleCode")  

The gtk:about-dialog implementation has a single CSS node with the name window and the .aboutdialog style class.

The "activate-link" signal

lambda (dialog uri)    :run-last      

dialog

The gtk:about-dialog widget on which the signal was emitted.

uri

The string with the URI that is activated.

Returns

True if the link has been activated.

Emitted when a URL is activated. Applications may connect to it to override the default behaviour, which is to call the gtk:file-launcher-launch function.