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* @Id: curs_add_wch.3x,v 1.4 2002/02/16 22:28:43 tom Exp @
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<H1>curs_add_wch 3x</H1>
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<PRE>
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</PRE>
<H2>NAME</H2><PRE>
<STRONG>add_wch</STRONG>, <STRONG>wadd_wch</STRONG>, <STRONG>mvadd_wch</STRONG>, <STRONG>mvwadd_wch</STRONG>, <STRONG>echo_wchar</STRONG>,
<STRONG>wecho_wchar</STRONG> - add a complex character and rendition to a
<STRONG>curses</STRONG> window, then advance the cursor
</PRE>
<H2>SYNOPSIS</H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>int</STRONG> <STRONG>add_wch(</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM> <STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>wadd_wch(</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>
<STRONG>int</STRONG> <STRONG>mvadd_wch(</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM> <STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>mvwadd_wch(</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG>
<STRONG>*</STRONG><EM>wch</EM> <STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>echo_wchar(</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM> <STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>wecho_wchar(</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>
</PRE>
<H2>DESCRIPTION</H2><PRE>
The <STRONG>add_wch</STRONG>, <STRONG>wadd_wch</STRONG>, <STRONG>mvadd_wch</STRONG>, and <STRONG>mvwadd_wch</STRONG> functions
put the complex character <EM>wch</EM> into the given window at its
current position, which is then advanced. These functions
perform wrapping and special-character processing as fol-
lows:
- If <EM>wch</EM> refers to a spacing character, then any previ-
ous character at that location is removed. A new
character specified by <EM>wch</EM> is placed at that location
with rendition specified by <EM>wch</EM>. The cursor then
advances to the next spacing character on the screen.
- If <EM>wch</EM> refers to a non-spacing character, all previ-
ous characters at that location are preserved. The
non-spacing characters of <EM>wch</EM> are added to the spac-
ing complex character, and the rendition specified by
<EM>wch</EM> is ignored.
- If the character part of <EM>wch</EM> is a tab, newline,
backspace or other control character, the window is
updated and the cursor moves as if <STRONG><A HREF="addch.3x.html">addch(3x)</A></STRONG> were
called.
The <STRONG>echo_wchar</STRONG> function is functionally equivalent to a
call to <STRONG>add_wch</STRONG> followed by a call to <STRONG>refresh</STRONG>. Similarly,
the <STRONG>wecho_wchar</STRONG> is functionally equivalent to a call to
<STRONG>wadd_wch</STRONG> followed by a call to <STRONG>wrefresh</STRONG>. The knowledge
that only a single character is being output is taken into
consideration and, for non-control characters, a consider-
able performance gain might be seen by using the *<STRONG>echo</STRONG>*
functions instead of their equivalents.
</PRE>
<H2>RETURN VALUES</H2><PRE>
All routines return the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> on
success.
</PRE>
<H2>NOTES</H2><PRE>
Note that <STRONG>add_wch</STRONG>, <STRONG>mvadd_wch</STRONG>, <STRONG>mvwadd_wch</STRONG>, and <STRONG>echo_wchar</STRONG>
may be macros.
</PRE>
<H2>PORTABILITY</H2><PRE>
All these functions are described in the XSI Curses stan-
dard, Issue 4. The defaults specified for forms-drawing
characters apply in the POSIX locale.
XSI documents constants beginning with <STRONG>WACS_</STRONG> which are
used for line-drawing. Those are not currently imple-
mented in <STRONG>ncurses</STRONG>.
</PRE>
<H2>SEE ALSO</H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_attr_get.3x.html">curs_attr_get(3x)</A></STRONG>, <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>, <STRONG>curs_out-</STRONG>
<STRONG><A HREF="curs_outopts.3x.html">opts(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>, <STRONG><A HREF="putwc.3.html">putwc(3)</A></STRONG>
</PRE>
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