This feature request come from a thread on GNOME desktop devel mailing list.

See http://lists.gnome.org/archives/desktop-devel-list/2004-October/msg00134.html

and http://lists.gnome.org/archives/desktop-devel-list/2004-October/msg00135.html


Actually you can set the logo image for the about dialog loading an image as
GdkPixbuf.

The request is provide in GtkAboutDialog API a function like 

void gtk_about_dialog_set_icon_name (GtkAboutDialog *about,
				     const char     *icon_name);

----------------------------


First of all note that we can distinguish GNOME/GTK+ applications in:
	* applications that provide a cool/custom logo (gedit, rhythmbox, sound-juicer)
to use ONLY in about dialog
	* applications that use a named icon as logo in about window (gpdf,
gnome-dictionary, all panel applets...)


So, when the application don't provide a custom pixmap to use as logo, but it
uses a named icon, is reasonable make the logo themeable too.

By now you can do something like

	gtk_window_set_default_icon_name ("named-icon");
	
	....
	
	icon_theme = gtk_icon_theme_get_default();
	pixbuf = gtk_icon_theme_load_icon (
		icon_theme,"named-icon", 48, 0, NULL);

	about = gtk_about_dialog_new ();
	gtk_about_dialog_set_logo (about, pixbuf);

	....

and use a named icon as logo, but if you change the icon theme while the about
dialog is open, the logo is not updated.

We are asking for a function to manage the named icon directly in GtkAboutDialog
API, as gtk_window_set_(default_)icon_name do for GtkWindows.