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.\" Copyright (c) 1999 - Sun Microsystems, Inc.
.\" All rights reserved.
.\"
.\" Permission is hereby granted, free of charge, to any person obtaining a
.\" copy of this software and associated documentation files (the
.\" "Software"), to deal in the Software without restriction, including
.\" without limitation the rights to use, copy, modify, merge, publish,
.\" distribute, and/or sell copies of the Software, and to permit persons
.\" to whom the Software is furnished to do so, provided that the above
.\" copyright notice(s) and this permission notice appear in all copies of
.\" the Software and that both the above copyright notice(s) and this
.\" permission notice appear in supporting documentation.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
.\" OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
.\" HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
.\" INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
.\" FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
.\" NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
.\" WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.\" Except as contained in this notice, the name of a copyright holder
.\" shall not be used in advertising or otherwise to promote the sale, use
.\" or other dealings in this Software without prior written authorization
.\" of the copyright holder.
.\"
.TH XkbAddGeomOverlay __libmansuffix__ __xorgversion__ "XKB FUNCTIONS"
.SH NAME
XkbAddGeomOverlay \- Add one overlay to a section
.SH SYNOPSIS
.HP
.B XkbOverlayPtr XkbAddGeomOverlay
.BI "(\^XkbSectionPtr " "section" "\^,"
.BI "Atom " "name" "\^,"
.BI "int " "sz_rows" "\^);"
.if n .ti +5n
.if t .ti +.5i
.SH ARGUMENTS
.TP
.I \- section
section to which an overlay will be added
.TP
.I \- name
name of the overlay
.TP
.I \- sz_rows
number of rows to reserve in the overlay
.SH DESCRIPTION
.LP
Xkb provides functions to add a single new element to the top-level keyboard
geometry. In each case the
.I num_ *
fields of the corresponding structure is incremented by 1. These functions do
not change
.I 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
.I 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.
.I XkbAddGeomOverlay
adds an overlay with the specified name to the specified
.I section.
The new overlay is created with space allocated for
.I sz_rows
rows. If an overlay with name
.I name
already exists in the section, a pointer to the existing overlay is returned.
.I 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 number of overlays to
a section, use the
.I XkbAllocGeomOverlay
function.
.SH STRUCTURES
.LP
.nf
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;
.fi
.SH "SEE ALSO"
.BR XkbAllocGeomOverlay (__libmansuffix__)
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