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<H1 class="no-header">curs_pad 3x</H1>
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<PRE>
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<STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG> <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG>
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</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
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<STRONG>newpad</STRONG>, <STRONG>subpad</STRONG>, <STRONG>prefresh</STRONG>, <STRONG>pnoutrefresh</STRONG>, <STRONG>pechochar</STRONG>,
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<STRONG>pecho_wchar</STRONG> - create and display <STRONG>curses</STRONG> pads
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</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
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<STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
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<STRONG>WINDOW</STRONG> <STRONG>*newpad(int</STRONG> <EM>nlines</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>ncols</EM><STRONG>);</STRONG>
<STRONG>WINDOW</STRONG> <STRONG>*subpad(WINDOW</STRONG> <STRONG>*</STRONG><EM>orig</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>nlines</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>ncols</EM><STRONG>,</STRONG>
<STRONG>int</STRONG> <EM>begin</EM><STRONG>_</STRONG><EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>begin</EM><STRONG>_</STRONG><EM>x</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>prefresh(WINDOW</STRONG> <STRONG>*</STRONG><EM>pad</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>pminrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>pmincol</EM><STRONG>,</STRONG>
<STRONG>int</STRONG> <EM>sminrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>smincol</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>smaxrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>smaxcol</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>pnoutrefresh(WINDOW</STRONG> <STRONG>*</STRONG><EM>pad</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>pminrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>pmincol</EM><STRONG>,</STRONG>
<STRONG>int</STRONG> <EM>sminrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>smincol</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>smaxrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>smaxcol</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>pechochar(WINDOW</STRONG> <STRONG>*</STRONG><EM>pad</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ch</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>pecho_wchar(WINDOW</STRONG> <STRONG>*</STRONG><EM>pad</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM><STRONG>);</STRONG>
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</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
</PRE><H3><a name="h3-newpad">newpad</a></H3><PRE>
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The <STRONG>newpad</STRONG> routine creates and returns a pointer to a new
pad data structure with the given number of lines, <EM>nlines</EM>,
and columns, <EM>ncols</EM>. A pad is like a window, except that
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it is not restricted by the screen size, and is not neces-
sarily associated with a particular part of the screen.
Pads can be used when a large window is needed, and only a
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part of the window will be on the screen at one time. Au-
tomatic refreshes of pads (e.g., from scrolling or echoing
of input) do not occur. It is not legal to call <STRONG>wrefresh</STRONG>
with a <EM>pad</EM> as an argument; the routines <STRONG>prefresh</STRONG> or
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<STRONG>pnoutrefresh</STRONG> should be called instead. Note that these
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routines require additional parameters to specify the part
of the pad to be displayed and the location on the screen
to be used for the display.
</PRE><H3><a name="h3-subpad">subpad</a></H3><PRE>
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The <STRONG>subpad</STRONG> routine creates and returns a pointer to a sub-
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window within a pad with the given number of lines,
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<EM>nlines</EM>, and columns, <EM>ncols</EM>. Unlike <STRONG>subwin</STRONG>, which uses
screen coordinates, the window is at position (<EM>begin</EM>_<EM>x</EM><STRONG>,</STRONG>
<EM>begin</EM>_<EM>y</EM>) on the pad. The window is made in the middle of
the window <EM>orig</EM>, so that changes made to one window affect
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both windows. During the use of this routine, it will of-
ten be necessary to call <STRONG>touchwin</STRONG> or <STRONG>touchline</STRONG> on <EM>orig</EM> be-
fore calling <STRONG>prefresh</STRONG>.
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</PRE><H3><a name="h3-prefresh_-pnoutrefresh">prefresh, pnoutrefresh</a></H3><PRE>
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The <STRONG>prefresh</STRONG> and <STRONG>pnoutrefresh</STRONG> routines are analogous to
<STRONG>wrefresh</STRONG> and <STRONG>wnoutrefresh</STRONG> except that they relate to pads
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instead of windows. The additional parameters are needed
to indicate what part of the pad and screen are involved.
The <EM>pminrow</EM> and <EM>pmincol</EM> parameters specify the upper left-
hand corner of the rectangle to be displayed in the pad.
The <EM>sminrow</EM>, <EM>smincol</EM>, <EM>smaxrow</EM>, and <EM>smaxcol</EM> parameters
specify the edges of the rectangle to be displayed on the
screen. The lower right-hand corner of the rectangle to
be displayed in the pad is calculated from the screen co-
ordinates, since the rectangles must be the same size.
Both rectangles must be entirely contained within their
respective structures. Negative values of <EM>pminrow</EM>, <EM>pmin-</EM>
<EM>col</EM>, <EM>sminrow</EM>, or <EM>smincol</EM> are treated as if they were zero.
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</PRE><H3><a name="h3-pechochar">pechochar</a></H3><PRE>
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The <STRONG>pechochar</STRONG> routine is functionally equivalent to a call
to <STRONG>addch</STRONG> followed by a call to <STRONG>refresh</STRONG>, a call to <STRONG>waddch</STRONG>
followed by a call to <STRONG>wrefresh</STRONG>, or a call to <STRONG>waddch</STRONG> fol-
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lowed by a call to <STRONG>prefresh</STRONG>. The knowledge that only a
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single character is being output is taken into considera-
tion and, for non-control characters, a considerable per-
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formance gain might be seen by using these routines in-
stead of their equivalents. In the case of <STRONG>pechochar</STRONG>, the
last location of the pad on the screen is reused for the
arguments to <STRONG>prefresh</STRONG>.
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</PRE><H3><a name="h3-pecho_wchar">pecho_wchar</a></H3><PRE>
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The <STRONG>pecho_wchar</STRONG> function is the analogous wide-character
form of <STRONG>pechochar</STRONG>. It outputs one character to a pad and
immediately refreshes the pad. It does this by a call to
<STRONG>wadd_wch</STRONG> followed by a call to <STRONG>prefresh</STRONG>.
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</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
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Routines that return an integer return <STRONG>ERR</STRONG> upon failure
and <STRONG>OK</STRONG> (SVr4 only specifies "an integer value other than
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<STRONG>ERR</STRONG>") upon successful completion.
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Routines that return pointers return <STRONG>NULL</STRONG> on error, and
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set <STRONG>errno</STRONG> to <STRONG>ENOMEM</STRONG>.
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X/Open does not define any error conditions. In this im-
plementation
<STRONG>prefresh</STRONG> and <STRONG>pnoutrefresh</STRONG>
return an error if the window pointer is null, or
if the window is not really a pad or if the area
to refresh extends off-screen or if the minimum
coordinates are greater than the maximum.
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<STRONG>pechochar</STRONG>
returns an error if the window is not really a
pad, and the associated call to <STRONG>wechochar</STRONG> returns
an error.
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<STRONG>pecho_wchar</STRONG>
returns an error if the window is not really a
pad, and the associated call to <STRONG>wecho_wchar</STRONG> re-
turns an error.
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</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
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Note that <STRONG>pechochar</STRONG> may be a macro.
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</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
The XSI Curses standard, Issue 4 describes these func-
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tions.
</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_refresh.3x.html">curs_refresh(3x)</A></STRONG>, <STRONG><A HREF="curs_touch.3x.html">curs_touch(3x)</A></STRONG>, <STRONG>curs_add-</STRONG>
<STRONG><A HREF="curs_addch.3x.html">ch(3x)</A></STRONG>.
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<STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG>
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</PRE>
<div class="nav">
<ul>
<li><a href="#h2-NAME">NAME</a></li>
<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
<ul>
<li><a href="#h3-newpad">newpad</a></li>
<li><a href="#h3-subpad">subpad</a></li>
<li><a href="#h3-prefresh_-pnoutrefresh">prefresh, pnoutrefresh</a></li>
<li><a href="#h3-pechochar">pechochar</a></li>
<li><a href="#h3-pecho_wchar">pecho_wchar</a></li>
</ul>
</li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-NOTES">NOTES</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
</ul>
</div>
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