ncurses 5.9 - patch 20150214
[ncurses.git] / doc / html / man / curs_bkgd.3x.html
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29   * @Id: curs_bkgd.3x,v 1.22 2010/12/04 18:36:44 tom Exp @
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36 <TITLE>curs_bkgd 3x</TITLE>
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41 <H1>curs_bkgd 3x</H1>
42 <HR>
43 <PRE>
44 <STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG>                                             <STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG>
45
46
47
48
49 </PRE>
50 <H2><a name="h2-NAME">NAME</a></H2><PRE>
51        <STRONG>bkgdset</STRONG>,  <STRONG>wbkgdset</STRONG>,  <STRONG>bkgd</STRONG>,  <STRONG>wbkgd</STRONG>, <STRONG>getbkgd</STRONG> - <STRONG>curses</STRONG> window
52        background manipulation routines
53
54
55 </PRE>
56 <H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
57        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
58
59        <STRONG>void</STRONG> <STRONG>bkgdset(chtype</STRONG> <STRONG>ch);</STRONG>
60        <STRONG>void</STRONG> <STRONG>wbkgdset(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
61        <STRONG>int</STRONG> <STRONG>bkgd(chtype</STRONG> <STRONG>ch);</STRONG>
62        <STRONG>int</STRONG> <STRONG>wbkgd(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
63        <STRONG>chtype</STRONG> <STRONG>getbkgd(WINDOW</STRONG> <STRONG>*win);</STRONG>
64
65
66 </PRE>
67 <H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
68        The <STRONG>bkgdset</STRONG> and <STRONG>wbkgdset</STRONG>  routines  manipulate  the  back-
69        ground  of  the  named window.  The window background is a
70        <STRONG>chtype</STRONG> consisting of any combination of attributes  (i.e.,
71        rendition)  and  a  character.   The attribute part of the
72        background is combined (OR'ed) with all non-blank  charac-
73        ters  that  are written into the window with <STRONG>waddch</STRONG>.  Both
74        the character and attribute parts of  the  background  are
75        combined   with  the  blank  characters.   The  background
76        becomes a property of the character  and  moves  with  the
77        character   through   any   scrolling   and  insert/delete
78        line/character operations.
79
80        To the extent  possible  on  a  particular  terminal,  the
81        attribute  part  of  the  background  is  displayed as the
82        graphic rendition of the character put on the screen.
83
84        The <STRONG>bkgd</STRONG> and <STRONG>wbkgd</STRONG> functions set the  background  property
85        of  the  current  or  specified window and then apply this
86        setting to every character position in that window:
87
88               The rendition of every character on the  screen  is
89               changed to the new background rendition.
90
91               Wherever  the  former background character appears,
92               it is changed to the new background character.
93
94        The <STRONG>getbkgd</STRONG> function returns the  given  window's  current
95        background character/attribute pair.
96
97
98 </PRE>
99 <H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
100        The  routines  <STRONG>bkgd</STRONG>  and <STRONG>wbkgd</STRONG> return the integer <STRONG>OK</STRONG>.  The
101        SVr4.0 manual says "or a non-negative integer  if  <STRONG>immedok</STRONG>
102        is set", but this appears to be an error.
103
104
105 </PRE>
106 <H2><a name="h2-NOTES">NOTES</a></H2><PRE>
107        Note that <STRONG>bkgdset</STRONG> and <STRONG>bkgd</STRONG> may be macros.
108
109
110 </PRE>
111 <H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
112        These  functions are described in the XSI Curses standard,
113        Issue 4.  It specifies that <STRONG>bkgd</STRONG> and <STRONG>wbkgd</STRONG> return  <STRONG>ERR</STRONG>  on
114        failure, but gives no failure conditions.
115
116
117 </PRE>
118 <H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
119        <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>
120        <STRONG><A HREF="curs_outopts.3x.html">opts(3x)</A></STRONG>
121
122
123
124                                                           <STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG>
125 </PRE>
126 <div class="nav">
127 <ul>
128 <li><a href="#h2-NAME">NAME</a></li>
129 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
130 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
131 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
132 <li><a href="#h2-NOTES">NOTES</a></li>
133 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
134 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
135 </ul>
136 </div>
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