Sends a mouse scroll event to the navigation interface. Mouse event coordinates
are sent relative to the display space of the related output area. This is
usually the size in pixels of the window associated with the element
implementing the #GstNavigation interface.
Sends a mouse scroll event to the navigation interface. Mouse event coordinates are sent relative to the display space of the related output area. This is usually the size in pixels of the window associated with the element implementing the #GstNavigation interface.