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