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X11R7.4 - man page for xkbaddgeomoverlayrow (x11r4 section 3)

XkbAddGeomOverlayRow(3) 		  XKB FUNCTIONS 		  XkbAddGeomOverlayRow(3)

NAME
       XkbAddGeomOverlayRow - Add a row to an existing overlay

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

ARGUMENTS
       - 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

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 dis-
       play  images  of  keyboards  can use geometry properties as hints, but they are not inter-
       preted 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, XkbAddGe-
       omOverlayRow 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.

STRUCTURES
	   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 1.2.1 		  XkbAddGeomOverlayRow(3)


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