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* @Id: curs_bkgd.3x,v 1.19 2003/12/27 18:50:40 tom Exp @
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<H1>curs_bkgd 3x</H1>
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<PRE>
<!-- Manpage converted by man2html 3.0.1 -->
<STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG> <STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG>
</PRE>
<H2>NAME</H2><PRE>
<STRONG>bkgdset</STRONG>, <STRONG>wbkgdset</STRONG>, <STRONG>bkgd</STRONG>, <STRONG>wbkgd</STRONG>, <STRONG>getbkgd</STRONG> - <STRONG>curses</STRONG> window
background manipulation routines
</PRE>
<H2>SYNOPSIS</H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>void</STRONG> <STRONG>bkgdset(chtype</STRONG> <STRONG>ch);</STRONG>
<STRONG>void</STRONG> <STRONG>wbkgdset(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
<STRONG>int</STRONG> <STRONG>bkgd(chtype</STRONG> <STRONG>ch);</STRONG>
<STRONG>int</STRONG> <STRONG>wbkgd(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
<STRONG>chtype</STRONG> <STRONG>getbkgd(WINDOW</STRONG> <STRONG>*win);</STRONG>
</PRE>
<H2>DESCRIPTION</H2><PRE>
The <STRONG>bkgdset</STRONG> and <STRONG>wbkgdset</STRONG> routines manipulate the back-
ground of the named window. The window background is a
<STRONG>chtype</STRONG> consisting of any combination of attributes (i.e.,
rendition) and a character. The attribute part of the
background is combined (OR'ed) with all non-blank charac-
ters that are written into the window with <STRONG>waddch</STRONG>. Both
the character and attribute parts of the background are
combined with the blank characters. The background
becomes a property of the character and moves with the
character through any scrolling and insert/delete
line/character operations.
To the extent possible on a particular terminal, the
attribute part of the background is displayed as the
graphic rendition of the character put on the screen.
The <STRONG>bkgd</STRONG> and <STRONG>wbkgd</STRONG> functions set the background property
of the current or specified window and then apply this
setting to every character position in that window:
The rendition of every character on the screen is
changed to the new background rendition.
Wherever the former background character appears,
it is changed to the new background character.
The <STRONG>getbkgd</STRONG> function returns the given window's current
background character/attribute pair.
</PRE>
<H2>RETURN VALUE</H2><PRE>
The routines <STRONG>bkgd</STRONG> and <STRONG>wbkgd</STRONG> return the integer <STRONG>OK</STRONG>. The
SVr4.0 manual says "or a non-negative integer if <STRONG>immedok</STRONG>
is set", but this appears to be an error.
</PRE>
<H2>NOTES</H2><PRE>
Note that <STRONG>bkgdset</STRONG> and <STRONG>bkgd</STRONG> may be macros.
</PRE>
<H2>PORTABILITY</H2><PRE>
These functions are described in the XSI Curses standard,
Issue 4. It specifies that <STRONG>bkgd</STRONG> and <STRONG>wbkgd</STRONG> return <STRONG>ERR</STRONG> on
failure. but gives no failure conditions.
</PRE>
<H2>SEE ALSO</H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>, <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>, <STRONG>curs_out-</STRONG>
<STRONG><A HREF="curs_outopts.3x.html">opts(3x)</A></STRONG>
<STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG>
</PRE>
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