Gtk.StyleContext.prototype.add_class
function add_class(class_name:String):void { // Gjs wrapper for gtk_style_context_add_class() }
Adds a style class to context, so posterior calls to Gtk.get or any of the gtk_render_*() functions will make use of this new class for styling.
In the CSS file format, a Gtk.Entry defining an "entry" class, would be matched by:
<programlisting> GtkEntry.entry { ... } </programlisting>
While any widget defining an "entry" class would be matched by: <programlisting> .entry { ... } </programlisting>
Since 3.0
- class_name
class name to use in styling