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105 lines
4.3 KiB
Plaintext
105 lines
4.3 KiB
Plaintext
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.TH curs_slk 3X ""
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.SH NAME
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\fBslk_init\fR, \fBslk_set\fR, \fBslk_refresh\fR,
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\fBslk_noutrefresh\fR, \fBslk_label\fR, \fBslk_clear\fR, \fBslk_restore\fR,
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\fBslk_touch\fR, \fBslk_attron\fR, \fBslk_attrset\fR, \fBslk_attroff\fR -
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\fBcurses\fR soft label routines
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.SH SYNOPSIS
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\fB#include <curses.h>\fR
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\fBint slk_init(int fmt);\fR
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.br
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\fBint slk_set(int labnum, const char *label, int fmt);\fR
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.br
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\fBint slk_refresh(void);\fR
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.br
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\fBint slk_noutrefresh(void);\fR
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.br
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\fBchar *slk_label(int labnum);\fR
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.br
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\fBint slk_clear(void);\fR
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.br
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\fBint slk_restore(void);\fR
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.br
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\fBint slk_touch(void);\fR
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.br
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\fBint slk_attron(attr_t attrs);\fR
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.br
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\fBint slk_attrset(attr_t attrs);\fR
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.br
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\fBattr_t slk_attr(void);\fR
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.br
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\fBint slk_attroff(attr_t attrs);\fR
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.br
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.SH DESCRIPTION
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The slk* functions manipulate the set of soft function-key labels that exist on
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many terminals. For those terminals that do not have soft labels,
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\fBcurses\fR takes over the bottom line of \fBstdscr\fR, reducing the size of
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\fBstdscr\fR and the variable \fBLINES\fR. \fBcurses\fR standardizes on eight
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labels of up to eight characters each. In addition to this, the ncurses
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implementation supports a mode where it simulates 12 labels of up to five
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characters each. This is most common for todays PC like enduser devices.
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Please note that ncurses simulates this mode by taking over up to two lines at
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the bottom of the screen, it doesn't try to use any hardware support for this
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mode.
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The \fBslk_init\fR routine must be called before \fBinitscr\fR or \fBnewterm\fR
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is called. If \fBinitscr\fR eventually uses a line from \fBstdscr\fR to
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emulate the soft labels, then \fIfmt\fR determines how the labels are arranged
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on the screen. Setting \fIfmt\fR to \fB0\fR indicates a 3-2-3 arrangement of
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the labels, \fB1\fR indicates a 4-4 arrangement and \fB2\fR indicates the
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PC like 4-4-4 mode. If \fBfmt\fR is set to \fB3\fR, it is again the PC like
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4-4-4 mode, but in addition an index line is generated, helping the user to
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identify the key numbers easily.
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The \fBslk_set\fR routine requires \fIlabnum\fR to be a label number,
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from \fB1\fR to \fB8\fR (resp. \fB12\fR); \fIlabel\fR must be the string
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to be put on the label, up to eight (resp. five) characters in length.
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A null string or a null pointer sets up a blank label. \fIfmt\fR is either
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\fB0\fR, \fB1\fR, or \fB2\fR, indicating whether the label is to be
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left-justified, centered, or right-justified, respectively, within the
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label.
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The \fBslk_refresh\fR and \fBslk_noutrefresh\fR routines correspond to
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the \fBwrefresh\fR and \fBwnoutrefresh\fR routines.
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The \fBslk_label\fR routine returns the current label for label number
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\fIlabnum\fR, with leading and trailing blanks stripped.
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The \fBslk_clear\fR routine clears the soft labels from the screen.
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The \fBslk_restore\fR routine, restores the soft labels to the screen
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after a \fBslk_clear\fR has been performed.
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The \fBslk_touch\fR routine forces all the soft labels to be output
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the next time a \fBslk_noutrefresh\fR is performed.
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The \fBslk_attron\fR, \fBslk_attrset\fR, \fBslk_attroff\fR and \fBslk_attr\fR
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routines correspond to \fBattron\fR, \fBattrset\fR, \fBattroff\fR and \fBattr_get\fR.
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They have an effect only if soft labels are simulated on the bottom line of
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the screen. The default highlight for soft keys is A_STANDOUT (as in
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System V curses, which does not document this fact).
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.SH RETURN VALUE
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These routines return \fBERR\fR upon failure and OK (SVr4 specifies only "an
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integer value other than \fBERR\fR") upon successful completion. \fBslk_attr\fR
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returns the attribute used for the soft keys.
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\fBslk_label\fR returns \fBNULL\fR on error.
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.SH NOTES
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Most applications would use \fBslk_noutrefresh\fR because a
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\fBwrefresh\fR is likely to follow soon.
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.SH PORTABILITY
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The XSI Curses standard, Issue 4, describes these functions. It changes the
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argument type of the attribute-manipulation functions \fBslk_attron\fR,
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\fBslk_attroff\fR, \fBslk_attrset\fR to be \fBattr_t\fR, and adds \fBconst\fR
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qualifiers. The format codes \fB2\fR and \fB3\fR for \fBslk_init()\fR and the
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function \fBslk_attr\fR are specific to ncurses.
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.SH SEE ALSO
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\fBcurses\fR(3X), \fBcurs_attr\fR(3X), \fBcurs_initscr\fR(3X), \fBcurs_refresh\fR(3X)
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.\"#
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.\"# The following sets edit modes for GNU EMACS
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.\"# Local Variables:
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.\"# mode:nroff
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.\"# fill-column:79
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.\"# End:
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