Display information about an application.
The GtkAboutDialog widget offers a simple way to display information
about a program, such as its logo, name, copyright, website and
license. It is also possible to give credits to the authors,
the documentation team, 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 dialog often contain links and email addresses.
GtkAboutDialog supports this by offering global
hooks, which are called when the user clicks on a link or email address, see
set_email_hook() and set_url_hook() . Email addresses in the
authors, documenters and artists properties are recognized by looking for
<user@host>, URLs are recognized by looking for http://url, with url
extending to the next space, tab or line break.
Constructs a new about dialog.