NAME

       XkbAddGeomOverlayKey - Add a key to an existing overlay row

SYNOPSIS

       XkbOverlayKeyPtr  XkbAddGeomOverlayKey (XkbOverlayPtr overlay, XkbRowPtr row, _Xconst char
              *over, _Xconst char *under);

ARGUMENTS

       - overlay
              overlay to be updated

       - row  row in overlay to be updated

       - under
              primary name of the key to be considered

DESCRIPTION

       Xkb provides functions to add a single new element to the top-level keyboard geometry.  In
       each  case  the  num_  *  fields of the corresponding structure is incremented by 1. These
       functions do not change sz_* unless there is no more room in  the  array.  Some  of  these
       functions  fill  in  the  values  of the element's structure from the arguments. For other
       functions, you must explicitly write code to fill the structure's elements.

       The top-level geometry description includes a list of  geometry  properties.   A  geometry
       property  associates  an  arbitrary  string  with an equally arbitrary name. Programs that
       display images of keyboards can use  geometry  properties  as  hints,  but  they  are  not
       interpreted by Xkb. No other geometry structures refer to geometry properties.

       XkbAddGeomOverlayKey  adds  one  key  to the row in the overlay.  If there is no key named
       under in the row of the underlying section, XkbAddGeomOverlayKey returns NULL.

STRUCTURES

           typedef struct _XkbOverlayKey {
               XkbKeyNameRec           over;      /* name of this overlay key */
               XkbKeyNameRec           under;     /* name of the key under this overlay key */
           } XkbOverlayKeyRec,*XkbOverlayKeyPtr;