<para>The <seecref="M:GLib.SimpleAction.Activated"/> event utilizes this delegate:</para>
<para>Event data is passed via the <seecref="T:GLib.ActivatedArgs"/> parameter.</para>
<para>To attach a <seecref="T:GLib.ActivatedHandler"/> to an event, add the ActivatedHandler instance to the event. The methods referenced by the ActivatedHandler instance are invoked whenever the event is raised, until the ActivatedHandler is removed from the event.</para>