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XkbAddGeomOverlay(3)		 XKB FUNCTIONS		  XkbAddGeomOverlay(3)

NAME
       XkbAddGeomOverlay - Add one overlay to a section

SYNOPSIS
       XkbOverlayPtr  XkbAddGeomOverlay (XkbSectionPtr section, Atom name, int
	      sz_rows);

ARGUMENTS
       - section
	      section to which an overlay will be added

       - name name of the overlay

       - sz_rows
	      number of rows to reserve in the overlay

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 ele‐
       ments.

       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.

       XkbAddGeomOverlay adds an overlay with the specified name to the speci‐
       fied  section.	The  new  overlay  is created with space allocated for
       sz_rows rows. If an overlay with name name already exists in  the  sec‐
       tion, a pointer to the existing overlay is returned.  XkbAddGeomOverlay
       returns NULL if any of the parameters is empty or if it was not able to
       allocate space for the overlay. To allocate space for an arbitrary num‐
       ber of overlays to a section, use the XkbAllocGeomOverlay function.

STRUCTURES
	   typedef struct _XkbOverlayRec {
	       Atom		     name;	      /∗ overlay name */
	       XkbSectionPtr	     section_under;   /∗ the section under this overlay */
	       unsigned short	     num_rows;	      /∗ number of rows in the rows array */
	       unsigned short	     sz_rows;	      /∗ size of the rows array */
	       XkbOverlayRowPtr	     rows;	      /∗ array of rows in the overlay */
	       XkbBoundsPtr	     bounds;	      /∗ bounding box for the overlay */
	   } XkbOverlayRec,*XkbOverlayPtr;

SEE ALSO
       XkbAllocGeomOverlay(3)

X Version 11			 libX11 1.3.5		  XkbAddGeomOverlay(3)

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