gst_navigation_event_get_type() when the passed event is not a navigation event. gst_navigation_event_parse_key_event() to extract the details from the event. gst_navigation_event_parse_key_event() to extract the details from the event. gst_navigation_event_parse_mouse_button_event() to extract the details from the event. gst_navigation_event_parse_mouse_button_event() to extract the details from the event. gst_navigation_event_parse_mouse_move_event() to extract the details from the event. gst_navigation_event_parse_command() to extract the details from the event. Enum values for the various events that an element implementing the GstNavigation interface might send up the pipeline.