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- * @Id: curs_outopts.3x,v 1.18 2003/05/10 20:33:49 jmc Exp @
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<!-- Manpage converted by man2html 3.0.1 -->
-<STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG> <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>
+<STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG> <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>
</PRE>
<H2>NAME</H2><PRE>
- <STRONG>clearok</STRONG>, <STRONG>idlok</STRONG>, <STRONG>idcok</STRONG>, <STRONG>immedok</STRONG>, <STRONG>leaveok</STRONG>, <STRONG>setscrreg</STRONG>,
+ <STRONG>clearok</STRONG>, <STRONG>idlok</STRONG>, <STRONG>idcok</STRONG>, <STRONG>immedok</STRONG>, <STRONG>leaveok</STRONG>, <STRONG>setscrreg</STRONG>,
<STRONG>wsetscrreg</STRONG>, <STRONG>scrollok</STRONG>, <STRONG>nl</STRONG>, <STRONG>nonl</STRONG> - <STRONG>curses</STRONG> output options
<H2>DESCRIPTION</H2><PRE>
These routines set options that change the style of output
within <STRONG>curses</STRONG>. All options are initially <STRONG>FALSE</STRONG>, unless
- otherwise stated. It is not necessary to turn these
- options off before calling <STRONG>endwin</STRONG>.
+ otherwise stated. It is not necessary to turn these op-
+ tions off before calling <STRONG>endwin</STRONG>.
If <STRONG>clearok</STRONG> is called with <STRONG>TRUE</STRONG> as argument, the next call
to <STRONG>wrefresh</STRONG> with this window will clear the screen com-
needs insert/delete line, for example, for a screen edi-
tor. It is disabled by default because insert/delete line
tends to be visually annoying when used in applications
- where it isn't really needed. If insert/delete line can-
+ where it is not really needed. If insert/delete line can-
not be used, <STRONG>curses</STRONG> redraws the changed portions of all
lines.
the window image, such as the ones caused by <STRONG>waddch,</STRONG> <STRONG>wclr-</STRONG>
<STRONG>tobot,</STRONG> <STRONG>wscrl</STRONG>, etc., automatically cause a call to <STRONG>wre-</STRONG>
<STRONG>fresh</STRONG>. However, it may degrade performance considerably,
- due to repeated calls to <STRONG>wrefresh</STRONG>. It is disabled by
- default.
+ due to repeated calls to <STRONG>wrefresh</STRONG>. It is disabled by de-
+ fault.
Normally, the hardware cursor is left at the location of
- the window cursor being refreshed. The <STRONG>leaveok</STRONG> option
- allows the cursor to be left wherever the update happens
- to leave it. It is useful for applications where the cur-
- sor is not used, since it reduces the need for cursor
- motions.
-
- The <STRONG>setscrreg</STRONG> and <STRONG>wsetscrreg</STRONG> routines allow the applica-
- tion programmer to set a software scrolling region in a
- window. <EM>top</EM> and <EM>bot</EM> are the line numbers of the top and
- bottom margin of the scrolling region. (Line 0 is the top
- line of the window.) If this option and <STRONG>scrollok</STRONG> are
- enabled, an attempt to move off the bottom margin line
- causes all lines in the scrolling region to scroll one
- line in the direction of the first line. Only the text of
- the window is scrolled. (Note that this has nothing to do
- with the use of a physical scrolling region capability in
- the terminal, like that in the VT100. If <STRONG>idlok</STRONG> is enabled
- and the terminal has either a scrolling region or
- insert/delete line capability, they will probably be used
- by the output routines.)
-
- The <STRONG>scrollok</STRONG> option controls what happens when the cursor
- of a window is moved off the edge of the window or
- scrolling region, either as a result of a newline action
- on the bottom line, or typing the last character of the
+ the window cursor being refreshed. The <STRONG>leaveok</STRONG> option al-
+ lows the cursor to be left wherever the update happens to
+ leave it. It is useful for applications where the cursor
+ is not used, since it reduces the need for cursor motions.
+
+ The <STRONG>setscrreg</STRONG> and <STRONG>wsetscrreg</STRONG> routines allow the applica-
+ tion programmer to set a software scrolling region in a
+ window. The <EM>top</EM> and <EM>bot</EM> parameters are the line numbers
+ of the top and bottom margin of the scrolling region.
+ (Line 0 is the top line of the window.) If this option
+ and <STRONG>scrollok</STRONG> are enabled, an attempt to move off the bot-
+ tom margin line causes all lines in the scrolling region
+ to scroll one line in the direction of the first line.
+ Only the text of the window is scrolled. (Note that this
+ has nothing to do with the use of a physical scrolling re-
+ gion capability in the terminal, like that in the VT100.
+ If <STRONG>idlok</STRONG> is enabled and the terminal has either a
+ scrolling region or insert/delete line capability, they
+ will probably be used by the output routines.)
+
+ The <STRONG>scrollok</STRONG> option controls what happens when the cursor
+ of a window is moved off the edge of the window or
+ scrolling region, either as a result of a newline action
+ on the bottom line, or typing the last character of the
last line. If disabled, (<EM>bf</EM> is <STRONG>FALSE</STRONG>), the cursor is left
- on the bottom line. If enabled, (<EM>bf</EM> is <STRONG>TRUE</STRONG>), the window
- is scrolled up one line (Note that to get the physical
- scrolling effect on the terminal, it is also necessary to
+ on the bottom line. If enabled, (<EM>bf</EM> is <STRONG>TRUE</STRONG>), the window
+ is scrolled up one line (Note that to get the physical
+ scrolling effect on the terminal, it is also necessary to
call <STRONG>idlok</STRONG>).
- The <STRONG>nl</STRONG> and <STRONG>nonl</STRONG> routines control whether the underlying
- display device translates the return key into newline on
- input, and whether it translates newline into return and
- line-feed on output (in either case, the call <STRONG>addch('\n')</STRONG>
+ The <STRONG>nl</STRONG> and <STRONG>nonl</STRONG> routines control whether the underlying
+ display device translates the return key into newline on
+ input, and whether it translates newline into return and
+ line-feed on output (in either case, the call <STRONG>addch('\n')</STRONG>
does the equivalent of return and line feed on the virtual
- screen). Initially, these translations do occur. If you
- disable them using <STRONG>nonl</STRONG>, <STRONG>curses</STRONG> will be able to make bet-
- ter use of the line-feed capability, resulting in faster
- cursor motion. Also, <STRONG>curses</STRONG> will then be able to detect
+ screen). Initially, these translations do occur. If you
+ disable them using <STRONG>nonl</STRONG>, <STRONG>curses</STRONG> will be able to make bet-
+ ter use of the line-feed capability, resulting in faster
+ cursor motion. Also, <STRONG>curses</STRONG> will then be able to detect
the return key.
cess and <STRONG>ERR</STRONG> upon failure. All other routines that return
an integer always return <STRONG>OK</STRONG>.
+ X/Open does not define any error conditions.
+
+ In this implementation, those functions that have a window
+ pointer will return an error if the window pointer is
+ null.
+
+ <STRONG>wclrtoeol</STRONG>
+ returns an error if the cursor position is
+ about to wrap.
+
+ <STRONG>wsetscrreg</STRONG>
+ returns an error if the scrolling region lim-
+ its extend outside the window.
+
+ X/Open does not define any error conditions. This imple-
+ mentation returns an error if the window pointer is null.
+
</PRE>
<H2>PORTABILITY</H2><PRE>
translations; AT&T curses (at least as late as SVr1) did
not. We choose to do so, on the theory that a programmer
requesting raw input wants a clean (ideally 8-bit clean)
- connection that the operating system does not mess with.
+ connection that the operating system will not alter.
Some historic curses implementations had, as an undocu-
mented feature, the ability to do the equivalent of
</PRE>
<H2>SEE ALSO</H2><PRE>
<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_clear.3x.html">curs_clear(3x)</A></STRONG>,
- <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>, <STRONG><A HREF="curs_scroll.3x.html">curs_scroll(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>
+ <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>, <STRONG><A HREF="curs_scroll.3x.html">curs_scroll(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>,
+ <STRONG><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>.
- <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>
+ <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>
</PRE>
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