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XkbAddGeomOverlayRow(3)          XKB FUNCTIONS         XkbAddGeomOverlayRow(3)

       XkbAddGeomOverlayRow - Add a row to an existing overlay

       XkbOverlayRowPtr XkbAddGeomOverlayRow ( overlay, row_under, sz_keys )
             XkbOverlayPtr overlay;
             XkbRowPtr row_under;
             int sz_keys;

       - overlay
              overlay to be updated

       - row_under
              row to be overlayed in the section overlay overlays

       - sz_keys
              number of keys to reserve in the row

       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  ele-

       The  top-level geometry description includes a list of geometry proper-
       ties.  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.

       XkbAddGeomOverlayRow adds one row to the overlay.  The new row contains
       space for sz_keys keys. If row_under specifies a row that doesn't exist
       on  the  underlying  section,  XkbAddGeomOverlayRow  returns  NULL  and
       doesn't change the overlay.  XkbAddGeomOverlayRow returns NULL  if  any
       of  the parameters is empty or if it was not able to allocate space for
       the overlay.

           typedef struct _XkbOverlayRow {
               unsigned short      row_under;    /* index into the row under this overlay row */
               unsigned short      num_keys;     /* number of keys in the keys array */
               unsigned short      sz_keys;      /* size of the keys array */
               XkbOverlayKeyPtr    keys;         /* array of keys in the overlay row */
           } XkbOverlayRowRec,*XkbOverlayRowPtr;

X Version 11                     libX11 1.1.5          XkbAddGeomOverlayRow(3)