.\"***************************************************************************
-.\" Copyright (c) 1998,2000 Free Software Foundation, Inc. *
+.\" Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: curs_slk.3x,v 1.10 2000/07/01 17:52:44 tom Exp $
+.\" $Id: curs_slk.3x,v 1.16 2007/06/02 20:40:07 tom Exp $
.TH curs_slk 3X ""
+.na
+.hy 0
.SH NAME
-\fBslk_init\fR, \fBslk_set\fR, \fBslk_refresh\fR,
-\fBslk_noutrefresh\fR, \fBslk_label\fR,
-\fBslk_clear\fR, \fBslk_restore\fR, \fBslk_touch\fR,
-\fBslk_attron\fR, \fBslk_attrset\fR, \fBslk_attroff\fR,
-\fBslk_attr_on\fR, \fBslk_attr_set\fR, \fBslk_attr_off\fR,
-\fBslk_attr\fR \fBslk_color\fR - \fBcurses\fR soft label routines
+\fBslk_init\fR,
+\fBslk_set\fR,
+\fBslk_refresh\fR,
+\fBslk_noutrefresh\fR,
+\fBslk_label\fR,
+\fBslk_clear\fR,
+\fBslk_restore\fR,
+\fBslk_touch\fR,
+\fBslk_attron\fR,
+\fBslk_attrset\fR,
+\fBslk_attroff\fR,
+\fBslk_attr_on\fR,
+\fBslk_attr_set\fR,
+\fBslk_attr_off\fR,
+\fBslk_attr\fR,
+\fBslk_color\fR - \fBcurses\fR soft label routines
+.ad
+.hy
.SH SYNOPSIS
\fB#include <curses.h>\fR
-
+.sp
\fBint slk_init(int fmt);\fR
.br
\fBint slk_set(int labnum, const char *label, int fmt);\fR
many terminals. For those terminals that do not have soft labels,
\fBcurses\fR takes over the bottom line of \fBstdscr\fR, reducing the size of
\fBstdscr\fR and the variable \fBLINES\fR. \fBcurses\fR standardizes on eight
-labels of up to eight characters each. In addition to this, the ncurses
+labels of up to eight characters each. In addition to this, the ncurses
implementation supports a mode where it simulates 12 labels of up to five
characters each. This is most common for todays PC like enduser devices.
Please note that ncurses simulates this mode by taking over up to two lines at
-the bottom of the screen, it doesn't try to use any hardware support for this
+the bottom of the screen, it does not try to use any hardware support for this
mode.
-
+.PP
The \fBslk_init\fR routine must be called before \fBinitscr\fR or \fBnewterm\fR
is called. If \fBinitscr\fR eventually uses a line from \fBstdscr\fR to
emulate the soft labels, then \fIfmt\fR determines how the labels are arranged
PC like 4-4-4 mode. If \fBfmt\fR is set to \fB3\fR, it is again the PC like
4-4-4 mode, but in addition an index line is generated, helping the user to
identify the key numbers easily.
-
+.PP
The \fBslk_set\fR routine requires \fIlabnum\fR to be a label number,
-from \fB1\fR to \fB8\fR (resp. \fB12\fR); \fIlabel\fR must be the string
+from \fB1\fR to \fB8\fR (resp. \fB12\fR); \fIlabel\fR must be the string
to be put on the label, up to eight (resp. five) characters in length.
A null string or a null pointer sets up a blank label. \fIfmt\fR is either
-\fB0\fR, \fB1\fR, or \fB2\fR, indicating whether the label is to be
+\fB0\fR, \fB1\fR, or \fB2\fR, indicating whether the label is to be
left-justified, centered, or right-justified, respectively, within the
label.
-
+.PP
The \fBslk_refresh\fR and \fBslk_noutrefresh\fR routines correspond to
the \fBwrefresh\fR and \fBwnoutrefresh\fR routines.
-
+.PP
The \fBslk_label\fR routine returns the current label for label number
\fIlabnum\fR, with leading and trailing blanks stripped.
-
+.PP
The \fBslk_clear\fR routine clears the soft labels from the screen.
-
-The \fBslk_restore\fR routine, restores the soft labels to the screen
+.PP
+The \fBslk_restore\fR routine restores the soft labels to the screen
after a \fBslk_clear\fR has been performed.
-
+.PP
The \fBslk_touch\fR routine forces all the soft labels to be output
the next time a \fBslk_noutrefresh\fR is performed.
-
+.PP
The \fBslk_attron\fR, \fBslk_attrset\fR, \fBslk_attroff\fR and \fBslk_attr\fR
routines correspond to \fBattron\fR, \fBattrset\fR, \fBattroff\fR and \fBattr_get\fR.
They have an effect only if soft labels are simulated on the bottom line of
-the screen. The default highlight for soft keys is A_STANDOUT (as in
+the screen. The default highlight for soft keys is A_STANDOUT (as in
System V curses, which does not document this fact).
-
+.PP
The \fBslk_color\fR routine corresponds to \fBcolor_set\fR. It has an effect only
if soft labels are simulated on the bottom line of the screen.
-
+.
.SH RETURN VALUE
These routines return \fBERR\fR upon failure and OK (SVr4 specifies only "an
-integer value other than \fBERR\fR") upon successful completion. \fBslk_attr\fR
+integer value other than \fBERR\fR") upon successful completion.
+.PP
+X/Open defines no error conditions.
+In this implementation
+.RS
+.TP 5
+\fBslk_attr\fR
returns the attribute used for the soft keys.
-
-\fBslk_label\fR returns \fBNULL\fR on error.
+.TP 5
+.na
+.hy 0
+\fBslk_attroff\fP, \fBslk_attron\fP, \fBslk_clear\fP, \fBslk_noutrefresh\fP, \fBslk_refresh\fP, \fBslk_touch\fP
+.ad
+.hy
+return an error
+if the terminal or the softkeys were not initialized.
+.TP 5
+\fBslk_attrset\fP
+returns an error
+if the terminal or the softkeys were not initialized.
+.TP 5
+\fBslk_attr_set\fP
+returns an error
+if the terminal or the softkeys were not initialized, or
+the color pair is outside the range 0..COLOR_PAIRS-1,
+or opts is not null.
+.TP 5
+\fBslk_color\fP
+returns an error
+if the terminal or the softkeys were not initialized, or
+the color pair is outside the range 0..COLOR_PAIRS-1.
+.TP 5
+\fBslk_init\fR
+returns an error
+if the format parameter is outside the range 0..3.
+.TP 5
+\fBslk_label\fR
+returns \fBNULL\fR on error.
+.TP 5
+\fBslk_set\fP
+returns an error
+if the terminal or the softkeys were not initialized, or
+the \fIlabnum\fP parameter is outside the range of label counts, or
+if the format parameter is outside the range 0..2, or if
+memory for the labels cannot be allocated.
+.RE
.SH NOTES
Most applications would use \fBslk_noutrefresh\fR because a
\fBwrefresh\fR is likely to follow soon.
projects / ncurses.git / blobdiff