102 lines
4.5 KiB
Plaintext
102 lines
4.5 KiB
Plaintext
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.\"***************************************************************************
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.\" Copyright (c) 1998 Free Software Foundation, Inc. *
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.\" *
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.\" Permission is hereby granted, free of charge, to any person obtaining a *
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.\" copy of this software and associated documentation files (the *
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.\" "Software"), to deal in the Software without restriction, including *
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.\" without limitation the rights to use, copy, modify, merge, publish, *
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.\" distribute, distribute with modifications, sublicense, and/or sell *
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.\" copies of the Software, and to permit persons to whom the Software is *
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.\" furnished to do so, subject to the following conditions: *
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.\" *
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.\" The above copyright notice and this permission notice shall be included *
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.\" in all copies or substantial portions of the Software. *
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.\" *
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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.\" *
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.\" Except as contained in this notice, the name(s) of the above copyright *
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.\" holders shall not be used in advertising or otherwise to promote the *
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.\" sale, use or other dealings in this Software without prior written *
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.\" authorization. *
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.\"***************************************************************************
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.\"
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.\" $Id: curs_bkgd.3x,v 1.12 1998/03/14 23:43:31 tom Exp $
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.TH curs_bkgd 3X ""
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.SH NAME
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\fBbkgdset\fR, \fBwbkgdset\fR, \fBbkgd\fR,
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\fBwbkgd\fR - \fBcurses\fR window background manipulation routines
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..
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.SH SYNOPSIS
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\fB#include <curses.h>\fR
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\fBvoid bkgdset(const chtype ch);\fR
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.br
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\fBvoid wbkgdset(WINDOW *win, const chtype ch);\fR
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.br
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\fBint bkgd(const chtype ch);\fR
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.br
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\fBint wbkgd(WINDOW *win, const chtype ch);\fR
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.br
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\fBchtype getbkgd(WINDOW *win);\fR
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.br
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..
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.SH DESCRIPTION
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The \fBbkgdset\fR and \fBwbkgdset\fR routines manipulate the
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background of the named window.
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The window background is a \fBchtype\fR consisting of
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any combination of attributes (i.e., rendition) and a character.
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The attribute part of the background is combined (OR'ed) with all non-blank
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characters that are written into the window with \fBwaddch\fR. Both
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the character and attribute parts of the background are combined with
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the blank characters. The background becomes a property of the
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character and moves with the character through any scrolling and
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insert/delete line/character operations.
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To the extent possible on a
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particular terminal, the attribute part of the background is displayed
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as the graphic rendition of the character put on the screen.
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The \fBbkgd\fR and \fBwbkgd\fR functions
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set the background property of the current or specified window
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and then apply this setting to every character position in that window:
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.RS
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The rendition of every character on the screen is changed to
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the new background rendition.
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Wherever the former background character
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appears, it is changed to the new background character.
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.RE
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The \fBgetbkgd\fR function returns the given window's current background
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character/attribute pair.
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..
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.SH RETURN VALUE
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The routines \fBbkgd\fR and \fBwbkgd\fR return the integer \fBOK\fR.
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The SVr4.0 manual says "or a non-negative integer if \fBimmedok\fR is set",
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but this appears to be an error.
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..
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.SH NOTES
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Note that \fBbkgdset\fR and \fBbkgd\fR may be macros.
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..
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.SH PORTABILITY
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These functions are described in the XSI Curses standard, Issue 4. The draft
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does not include \fBconst\fR qualifiers on the arguments. The standard
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specifies that \fBbkgd\fR and \fBwbkgd\fR return \fBERR\fR, on failure. but
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gives no failure conditions.
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..
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.SH SEE ALSO
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\fBcurses\fR(3X), \fBcurs_addch\fR(3X), \fBcurs_outopts\fR(3X)
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.\"#
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.\"# The following sets edit modes for GNU EMACS
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.\"# Local Variables:
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.\"# mode:nroff
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.\"# fill-column:79
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.\"# End:
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