Gets the edge used for determining reattachment of the handle box. See gtk_handle_box_set_snap_edge().
Deprecated: #GtkHandleBox has been deprecated.
Return: the edge used for determining reattachment, or (GtkPositionType)-1 if this is determined (as per default) from the handle position.
See Implementation
Gets the edge used for determining reattachment of the handle box. See gtk_handle_box_set_snap_edge().