mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
3e6427f35f
old 1M, 3X and 3S section numbers) and make some minor formatting changes to silence manck.
116 lines
5.4 KiB
Groff
116 lines
5.4 KiB
Groff
.TH curs_outopts 3 ""
|
|
.SH NAME
|
|
\fBclearok\fR, \fBidlok\fR, \fBidcok immedok\fR,
|
|
\fBleaveok\fR, \fBsetscrreg\fR, \fBwsetscrreg\fR, \fBscrollok\fR,
|
|
\fBnl\fR, \fBnonl\fR - \fBncurses\fR output options
|
|
.SH SYNOPSIS
|
|
\fB#include <ncurses.h>\fR
|
|
|
|
\fBint clearok(WINDOW *win, bool bf);\fR
|
|
.br
|
|
\fBint idlok(WINDOW *win, bool bf);\fR
|
|
.br
|
|
\fBvoid idcok(WINDOW *win, bool bf);\fR
|
|
.br
|
|
\fBvoid immedok(WINDOW *win, bool bf);\fR
|
|
.br
|
|
\fBint leaveok(WINDOW *win, bool bf);\fR
|
|
.br
|
|
\fBint setscrreg(int top, int bot);\fR
|
|
.br
|
|
\fBint wsetscrreg(WINDOW *win, int top, int bot);\fR
|
|
.br
|
|
\fBint scrollok(WINDOW *win, bool bf);\fR
|
|
.br
|
|
\fBint nl(void);\fR
|
|
.br
|
|
\fBint nonl(void);\fR
|
|
.br
|
|
.SH DESCRIPTION
|
|
These routines set options that change the style of output within
|
|
\fBncurses\fR. All options are initially \fBFALSE\fR, unless otherwise stated.
|
|
It is not necessary to turn these options off before calling \fBendwin\fR.
|
|
|
|
With the \fBclearok\fR routine, if enabled (\fIbf\fR is \fBTRUE\fR), the next
|
|
call to \fBwrefresh\fR with this window will clear the screen completely and
|
|
redraw the entire screen from scratch. This is useful when the contents of the
|
|
screen are uncertain, or in some cases for a more pleasing visual effect. If
|
|
the \fIwin\fR argument to \fBclearok\fR is the global variable \fBcurscr\fR,
|
|
the next call to \fBwrefresh\fR with any window causes the screen to be cleared
|
|
and repainted from scratch.
|
|
|
|
With the \fBidlok\fR routine, if enabled (\fIbf\fR is \fBTRUE\fR),
|
|
\fBncurses\fR considers using the hardware insert/delete line feature of
|
|
terminals so equipped. If disabled (\fIbf\fR is \fBFALSE\fR), \fBncurses\fR
|
|
very seldom uses this feature. (The insert/delete character feature is always
|
|
considered.) This option should be enabled only if the application needs
|
|
insert/delete line, for example, for a screen editor. 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 cannot be
|
|
used, \fBncurses\fR redraws the changed portions of all lines.
|
|
|
|
With the \fBidcok\fR routine, if enabled (\fIbf\fR is \fBTRUE\fR),
|
|
\fBncurses\fR considers using the hardware insert/delete character feature of
|
|
terminals so equipped. This is enabled by default.
|
|
|
|
With the \fBimmedok\fR routine, if enabled (\fIbf\fR is \fBTRUE)\fR, any change
|
|
in the window image, such as the ones caused by \fBwaddch, wclrtobot, wscrl\fR,
|
|
\fIetc\fR., automatically cause a call to \fBwrefresh\fR. However, it may
|
|
degrade the performance considerably, due to repeated calls to \fBwrefresh\fR.
|
|
It is disabled by default.
|
|
|
|
Normally, the hardware cursor is left at the location of the window cursor
|
|
being refreshed. The \fBleaveok\fR option allows 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. If
|
|
possible, the cursor is made invisible when this option is enabled.
|
|
|
|
The \fBsetscrreg\fR and \fBwsetscrreg\fR routines allow the application
|
|
programmer to set a software scrolling region in a window. \fItop\fR and
|
|
\fIbot\fR 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
|
|
\fBscrollok\fR are enabled, an attempt to move off the bottom margin line
|
|
causes all lines in the scrolling region to scroll up one 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 \fBidlok\fR 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 \fBscrollok\fR 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, (\fIbf\fR is \fBFALSE\fR), the cursor is left on the bottom
|
|
line. If enabled, (\fIbf\fR is \fBTRUE\fR), \fBwrefresh\fR is called on the
|
|
window, and the physical terminal and window are scrolled up one line. [Note
|
|
that in order to get the physical scrolling effect on the terminal, it is also
|
|
necessary to call \fBidlok\fR.]
|
|
|
|
The \fBnl\fR and \fBnonl\fR routines control whether newline is translated into
|
|
carriage return and linefeed on output, and whether return is translated into
|
|
newline on input. Initially, the translations do occur. By disabling these
|
|
translations using \fBnonl\fR, \fBncurses\fR is able to make better use of the
|
|
linefeed capability, resulting in faster cursor motion.
|
|
.SH RETURN VALUE
|
|
\fBsetscrreg\fR and \fBwsetscrreg\fR return \fBOK\fR upon success and \fBERR\fR upon failure.
|
|
All other routines that return an integer always return \fBOK\fR.
|
|
.SH BUGS
|
|
The entry points \fBidcok\fR, \fBimmedok\fR are not yet implemented in
|
|
ncurses 1.8.6. Setting \fIidlok\fR has unfortunate effects on scrolling
|
|
windows.
|
|
.SH NOTES
|
|
Note that \fBclearok\fR, \fBleaveok\fR, \fBscrollok\fR, \fBidcok\fR, \fBnl\fR,
|
|
\fBnonl\fR and \fBsetscrreg\fR may be macros.
|
|
|
|
The \fBimmedok\fR routine is useful for windows that are used as terminal
|
|
emulators.
|
|
.SH SEE ALSO
|
|
\fBncurses\fR(3), \fBcurs_addch\fR(3), \fBcurs_clear\fR(3),
|
|
\fBcurs_initscr\fR(3), \fBcurs_scroll\fR(3), \fBcurs_refresh\fR(3)
|
|
.\"#
|
|
.\"# The following sets edit modes for GNU EMACS
|
|
.\"# Local Variables:
|
|
.\"# mode:nroff
|
|
.\"# fill-column:79
|
|
.\"# End:
|