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  41 <H1 class="no-header">curs_bkgrnd 3x</H1>
  42 <PRE>
  43 <STRONG><A HREF="curs_bkgrnd.3x.html">curs_bkgrnd(3x)</A></STRONG>                                                <STRONG><A HREF="curs_bkgrnd.3x.html">curs_bkgrnd(3x)</A></STRONG>
  44
  45
  46
  47
  48 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
  49        <STRONG>bkgrnd</STRONG>,  <STRONG>wbkgrnd</STRONG>, <STRONG>bkgrndset</STRONG>, <STRONG>wbkgrndset</STRONG>, <STRONG>getbkgrnd</STRONG>, <STRONG>wgetbkgrnd</STRONG> - <STRONG>curses</STRONG>
  50        window complex background manipulation routines
  51
  52
  53 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
  54        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
  55
  56        <STRONG>int</STRONG> <STRONG>bkgrnd(</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM><STRONG>);</STRONG>
  57        <STRONG>int</STRONG> <STRONG>wbkgrnd(</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM><STRONG>);</STRONG>
  58        <STRONG>void</STRONG> <STRONG>bkgrndset(const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM> <STRONG>);</STRONG>
  59        <STRONG>void</STRONG> <STRONG>wbkgrndset(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM><STRONG>);</STRONG>
  60        <STRONG>int</STRONG> <STRONG>getbkgrnd(cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM><STRONG>);</STRONG>
  61        <STRONG>int</STRONG> <STRONG>wgetbkgrnd(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM><STRONG>);</STRONG>
  62
  63
  64 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
  65
  66 </PRE><H3><a name="h3-bkgrndset">bkgrndset</a></H3><PRE>
  67        The <STRONG>bkgrndset</STRONG> and <STRONG>wbkgrndset</STRONG> routines manipulate the background of  the
  68        named  window.   The  window  background is a <STRONG>cchar_t</STRONG> consisting of any
  69        combination of attributes (i.e., rendition) and  a  complex  character.
  70        The  attribute part of the background is combined (OR'ed) with all non-
  71        blank characters that are written into the window  with  <STRONG>waddch</STRONG>.   Both
  72        the  character  and attribute parts of the background are combined with
  73        the blank characters.  The background becomes a property of the charac-
  74        ter   and   moves   with   the  character  through  any  scrolling  and
  75        insert/delete line/character operations.
  76
  77        To the extent possible on a particular terminal, the attribute part  of
  78        the  background  is displayed as the graphic rendition of the character
  79        put on the screen.
  80
  81
  82 </PRE><H3><a name="h3-bkgrnd">bkgrnd</a></H3><PRE>
  83        The <STRONG>bkgrnd</STRONG> and <STRONG>wbkgrnd</STRONG> functions set the  background  property  of  the
  84        current  or specified window and then apply this setting to every char-
  85        acter position in that window:
  86
  87        <STRONG>o</STRONG>   The rendition of every character on the screen is  changed  to  the
  88            new background rendition.
  89
  90        <STRONG>o</STRONG>   Wherever  the former background character appears, it is changed to
  91            the new background character.
  92
  93
  94 </PRE><H3><a name="h3-getbkgrnd">getbkgrnd</a></H3><PRE>
  95        The <STRONG>getbkgrnd</STRONG> function returns the given  window's  current  background
  96        character/attribute  pair  via  the  <STRONG>wch</STRONG>  pointer.  If the given window
  97        pointer is null, the character is not updated (but no error returned).
  98
  99
 100 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
 101        Note that <STRONG>bkgrnd</STRONG>, <STRONG>bkgrndset</STRONG>, and <STRONG>getbkgrnd</STRONG> may be macros.
 102
 103        X/Open Curses does not provide details on how the rendition is changed.
 104        This  implementation follows the approach used in SVr4 curses, which is
 105        explained in the manual page for <STRONG>wbkgd</STRONG>.
 106
 107
 108 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
 109        The <STRONG>bkgrndset</STRONG> and <STRONG>wbkgrndset</STRONG> routines do not return a value.
 110
 111        Upon successful completion, the other functions return <STRONG>OK</STRONG>.   Otherwise,
 112        they return <STRONG>ERR</STRONG>:
 113
 114        <STRONG>o</STRONG>   A null window pointer is treated as an error.
 115
 116        <STRONG>o</STRONG>   A null character pointer is treated as an error.
 117
 118
 119 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
 120        These  functions  are  described  in  the  XSI Curses standard, Issue 4
 121        (X/Open Curses).
 122
 123
 124 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
 125        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG>
 126
 127
 128
 129                                                                <STRONG><A HREF="curs_bkgrnd.3x.html">curs_bkgrnd(3x)</A></STRONG>
 130 </PRE>
 131 <div class="nav">
 132 <ul>
 133 <li><a href="#h2-NAME">NAME</a></li>
 134 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 135 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
 136 <ul>
 137 <li><a href="#h3-bkgrndset">bkgrndset</a></li>
 138 <li><a href="#h3-bkgrnd">bkgrnd</a></li>
 139 <li><a href="#h3-getbkgrnd">getbkgrnd</a></li>
 140 </ul>
 141 </li>
 142 <li><a href="#h2-NOTES">NOTES</a></li>
 143 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
 144 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
 145 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
 146 </ul>
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