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- * @Id: curs_pad.3x,v 1.49 2023/11/25 14:08:35 tom Exp @
+ * @Id: curs_pad.3x,v 1.50 2023/12/16 21:18:02 tom Exp @
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-<H1 class="no-header">curs_pad 3x 2023-11-25 ncurses 6.4 Library calls</H1>
+<H1 class="no-header">curs_pad 3x 2023-12-16 ncurses 6.4 Library calls</H1>
<PRE>
<STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
</PRE><H3><a name="h3-newpad">newpad</a></H3><PRE>
- 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 it is not restricted by the screen
- size, and is not necessarily associated with a particular part of the
- screen. Pads can be used when a large window is needed, and only a
- part of the window will be on the screen at one time. Automatic
- refreshes of pads (e.g., from scrolling or echoing of input) do not
- occur.
-
- It is not valid to call <STRONG>wrefresh</STRONG> with a <EM>pad</EM> argument; call <STRONG>prefresh</STRONG> or
- <STRONG>pnoutrefresh</STRONG> instead. They require additional parameters to specify
- the part of the pad to be displayed and the location on the screen to
+ <STRONG>newpad</STRONG> 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 it is not restricted by the screen size, and is not
+ necessarily associated with a particular part of the screen. Pads can
+ be used when a large window is needed, and only a part of the window
+ will be on the screen at one time. Automatic refreshes of pads (as
+ from scrolling or echoing of input) do not occur.
+
+ It is not valid to call <STRONG>wrefresh</STRONG> with a <EM>pad</EM> argument; call <STRONG>prefresh</STRONG> or
+ <STRONG>pnoutrefresh</STRONG> instead. They 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>
- The <STRONG>subpad</STRONG> routine creates and returns a pointer to a subwindow within
- a pad with the given number of lines, <EM>nlines</EM>, and columns, <EM>ncols</EM>.
+ The <STRONG>subpad</STRONG> routine creates and returns a pointer to a subwindow within
+ a pad with the given number of lines, <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 both windows.
- During the use of this routine, it will often be necessary to call
+ window <EM>orig</EM>, so that changes made to one window affect both windows.
+ During the use of this routine, it will often be necessary to call
<STRONG>touchwin</STRONG> or <STRONG>touchline</STRONG> on <EM>orig</EM> before calling <STRONG>prefresh</STRONG>.
</PRE><H3><a name="h3-prefresh_-pnoutrefresh">prefresh, pnoutrefresh</a></H3><PRE>
- 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 instead of windows. The
- additional parameters are needed to indicate what part of the pad and
+ 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 instead of windows. The
+ additional parameters are needed to indicate what part of the pad and
screen are involved.
- <STRONG>o</STRONG> The <EM>pminrow</EM> and <EM>pmincol</EM> parameters specify the upper left-hand
+ <STRONG>o</STRONG> The <EM>pminrow</EM> and <EM>pmincol</EM> parameters specify the upper left-hand
corner of the rectangle to be displayed in the pad.
- <STRONG>o</STRONG> The <EM>sminrow</EM>, <EM>smincol</EM>, <EM>smaxrow</EM>, and <EM>smaxcol</EM> parameters specify the
+ <STRONG>o</STRONG> 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 coordinates, 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>pmincol</EM>, <EM>sminrow</EM>,
+ respective structures. Negative values of <EM>pminrow</EM>, <EM>pmincol</EM>, <EM>sminrow</EM>,
or <EM>smincol</EM> are treated as if they were zero.
</PRE><H3><a name="h3-pechochar">pechochar</a></H3><PRE>
- The <STRONG>pechochar</STRONG> routine is functionally equivalent to a call to <STRONG>addch</STRONG>
- followed by a call to <STRONG><A HREF="curs_refresh.3x.html">refresh(3x)</A></STRONG>, a call to <STRONG>waddch</STRONG> followed by a call
- to <STRONG>wrefresh</STRONG>, or a call to <STRONG>waddch</STRONG> followed by a call to <STRONG>prefresh</STRONG>. The
- knowledge that only a single character is being output is taken into
- consideration and, for non-control characters, a considerable
+ The <STRONG>pechochar</STRONG> routine is functionally equivalent to a call to <STRONG>addch</STRONG>
+ followed by a call to <STRONG><A HREF="curs_refresh.3x.html">refresh(3x)</A></STRONG>, a call to <STRONG>waddch</STRONG> followed by a call
+ to <STRONG>wrefresh</STRONG>, or a call to <STRONG>waddch</STRONG> followed by a call to <STRONG>prefresh</STRONG>. The
+ knowledge that only a single character is being output is taken into
+ consideration and, for non-control characters, a considerable
performance gain might be seen by using these routines instead 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>.
</PRE><H3><a name="h3-pecho_wchar">pecho_wchar</a></H3><PRE>
- The <STRONG>pecho_wchar</STRONG> function is the analogous wide-character form of
+ 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
+ the pad. It does this by a call to <STRONG>wadd_wch</STRONG> followed by a call to
<STRONG>prefresh</STRONG>.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
- Routines that return an integer return <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> (SVr4
- only specifies "an integer value other than <STRONG>ERR</STRONG>") upon successful
+ Functions that return an integer return <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> (SVr4
+ specifies only "an integer value other than <STRONG>ERR</STRONG>") upon successful
completion.
- Routines that return pointers return <STRONG>NULL</STRONG> on error, and set <STRONG>errno</STRONG> to
+ Functions that return pointers return <STRONG>NULL</STRONG> on error, and set <STRONG>errno</STRONG> to
<STRONG>ENOMEM</STRONG>.
- X/Open does not define any error conditions. In this implementation
+ X/Open Curses does not define any error conditions. In this
+ implementation
<STRONG>prefresh</STRONG> and <STRONG>pnoutrefresh</STRONG>
return an error if the window pointer is null, or if the window
</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
- Note that <STRONG>pechochar</STRONG> may be a macro.
+ <STRONG>pechochar</STRONG> may be a macro.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
conditions. The behavior of <STRONG>subpad</STRONG> if the parent window is not a pad
is undocumented, and is not checked by the vendor Unix implementations:
- <STRONG>o</STRONG> SVr4 <EM>curses</EM> sets a flag in the <STRONG>WINDOW</STRONG> structure in <STRONG>newpad</STRONG> which
+ <STRONG>o</STRONG> SVr4 <EM>curses</EM> sets a flag in the <EM>WINDOW</EM> structure in <STRONG>newpad</STRONG> which
tells if the window is a <EM>pad</EM>.
However, it uses this information only in <STRONG>waddch</STRONG> (to decide if it
does not check in <STRONG>wrefresh</STRONG> to ensure that the pad is refreshed
properly.
- <STRONG>o</STRONG> Solaris X/Open Curses checks if a window is a pad in <STRONG>wnoutrefresh</STRONG>,
+ <STRONG>o</STRONG> Solaris <EM>xcurses</EM> checks whether a window is a pad in <STRONG>wnoutrefresh</STRONG>,
returning <STRONG>ERR</STRONG> in that case.
However, it only sets the flag for subwindows if the parent window
enough, a comment in the source code states that the lack of a
check was an MKS extension.
- <STRONG>o</STRONG> NetBSD 7 <EM>curses</EM> sets a flag in the <STRONG>WINDOW</STRONG> structure for <STRONG>newpad</STRONG> and
+ <STRONG>o</STRONG> NetBSD 7 <EM>curses</EM> sets a flag in the <EM>WINDOW</EM> structure for <STRONG>newpad</STRONG> and
<STRONG>subpad</STRONG>, using this to help with the distinction between
<STRONG>wnoutrefresh</STRONG> and <STRONG>pnoutrefresh</STRONG>.
This implementation
- <STRONG>o</STRONG> sets a flag in the <STRONG>WINDOW</STRONG> structure for <STRONG>newpad</STRONG> and <STRONG>subpad</STRONG>,
+ <STRONG>o</STRONG> sets a flag in the <EM>WINDOW</EM> structure for <STRONG>newpad</STRONG> and <STRONG>subpad</STRONG>,
<STRONG>o</STRONG> allows a <STRONG>subwin</STRONG> or <STRONG>derwin</STRONG> call to succeed having a pad parent by
forcing the subwindow to be a pad,
-ncurses 6.4 2023-1
1-25 <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG>
+ncurses 6.4 2023-1
2-16 <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG>
</PRE>
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