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* @Id: curs_bkgd.3x,v 1.24 2015/11/21 01:53:42 tom Exp @
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
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<HTML>
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<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
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<meta name="generator" content="Manpage converted by man2html - see http://invisible-island.net/scripts/readme.html#others_scripts">
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<TITLE>curs_bkgd 3x</TITLE>
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<link rev=made href="mailto:bug-ncurses@gnu.org">
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<H1 class="no-header">curs_bkgd 3x</H1>
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<PRE>
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<STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG> <STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG>
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</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
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<STRONG>bkgdset</STRONG>, <STRONG>wbkgdset</STRONG>, <STRONG>bkgd</STRONG>, <STRONG>wbkgd</STRONG>, <STRONG>getbkgd</STRONG> - <STRONG>curses</STRONG> window
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background manipulation routines
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</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
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<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
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<STRONG>void</STRONG> <STRONG>bkgdset(chtype</STRONG> <EM>ch</EM><STRONG>);</STRONG>
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<STRONG>void</STRONG> <STRONG>wbkgdset(WINDOW</STRONG> <STRONG>*</STRONG><EM>win,</EM> <EM>chtype</EM> <EM>ch</EM><STRONG>);</STRONG>
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<STRONG>int</STRONG> <STRONG>bkgd(chtype</STRONG> <EM>ch</EM><STRONG>);</STRONG>
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<STRONG>int</STRONG> <STRONG>wbkgd(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ch</EM><STRONG>);</STRONG>
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<STRONG>chtype</STRONG> <STRONG>getbkgd(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
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</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
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</PRE><H3><a name="h3-bkgdset">bkgdset</a></H3><PRE>
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The <STRONG>bkgdset</STRONG> and <STRONG>wbkgdset</STRONG> routines manipulate the back-
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ground of the named window. The window background is a
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<STRONG>chtype</STRONG> consisting of any combination of attributes (i.e.,
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rendition) and a character. The attribute part of the
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background is combined (OR'ed) with all non-blank charac-
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ters that are written into the window with <STRONG>waddch</STRONG>. Both
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the character and attribute parts of the background are
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combined with the blank characters. The background
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becomes a property of the character and moves with the
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character through any scrolling and insert/delete
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line/character operations.
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To the extent possible on a particular terminal, the
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attribute part of the background is displayed as the
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graphic rendition of the character put on the screen.
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</PRE><H3><a name="h3-bkgd">bkgd</a></H3><PRE>
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The <STRONG>bkgd</STRONG> and <STRONG>wbkgd</STRONG> functions set the background property
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of the current or specified window and then apply this
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setting to every character position in that window:
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<STRONG>o</STRONG> The rendition of every character on the screen is
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changed to the new background rendition.
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<STRONG>o</STRONG> Wherever the former background character appears, it
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is changed to the new background character.
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</PRE><H3><a name="h3-getbkgd">getbkgd</a></H3><PRE>
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The <STRONG>getbkgd</STRONG> function returns the given window's current
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background character/attribute pair.
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</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
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The routines <STRONG>bkgd</STRONG> and <STRONG>wbkgd</STRONG> return the integer <STRONG>OK</STRONG>. The
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SVr4.0 manual says "or a non-negative integer if <STRONG>immedok</STRONG>
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is set", but this appears to be an error.
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</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
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Note that <STRONG>bkgdset</STRONG> and <STRONG>bkgd</STRONG> may be macros.
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</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
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These functions are described in the XSI Curses standard,
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Issue 4. It specifies that <STRONG>bkgd</STRONG> and <STRONG>wbkgd</STRONG> return <STRONG>ERR</STRONG> on
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failure, but gives no failure conditions.
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</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
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<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>
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<STRONG><A HREF="curs_outopts.3x.html">opts(3x)</A></STRONG>
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<STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG>
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</PRE>
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<div class="nav">
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<ul>
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<li><a href="#h2-NAME">NAME</a></li>
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<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
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<li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
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<ul>
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<li><a href="#h3-bkgdset">bkgdset</a></li>
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<li><a href="#h3-bkgd">bkgd</a></li>
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<li><a href="#h3-getbkgd">getbkgd</a></li>
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</ul>
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</li>
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<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
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<li><a href="#h2-NOTES">NOTES</a></li>
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<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
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<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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</ul>
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</div>
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