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