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curs_slk(3)	    UNIX Programmer's Manual	      curs_slk(3)

NAME
     slk_init, slk_set, slk_refresh, slk_noutrefresh, slk_label,
     slk_clear, slk_restore, slk_touch, slk_attron, slk_attrset,
     slk_attroff, slk_attr_on, slk_attr_set, slk_attr_off,
     slk_attr, slk_color - curses soft label routines

SYNOPSIS
     #include <curses.h>

     int slk_init(int fmt);
     int slk_set(int labnum, const char *label, int fmt);
     int slk_refresh(void);
     int slk_noutrefresh(void);
     char *slk_label(int labnum);
     int slk_clear(void);
     int slk_restore(void);
     int slk_touch(void);
     int slk_attron(const chtype attrs);
     int slk_attroff(const chtype attrs);
     int slk_attrset(const chtype attrs);
     int slk_attr_on(attr_t attrs, void* opts);
     int slk_attr_off(const attr_t attrs, void * opts);
     int slk_attr_set(const attr_t attrs,
	  short color_pair_number, void* opts);
     attr_t slk_attr(void);
     int slk_color(short color_pair_number);

DESCRIPTION
     The slk* functions manipulate the set of  soft  function-key
     labels  that  exist  on many terminals.  For those terminals
     that do not have soft labels, curses takes over  the  bottom
     line of stdscr, reducing the size of stdscr and the variable
     LINES.  curses standardizes on eight labels of up	to  eight
     characters	 each. In addition to this, the ncurses implemen-
     tation 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
     mode.

     The slk_init  routine  must  be  called  before  initscr  or
     newterm  is  called.  If initscr eventually uses a line from
     stdscr to emulate the soft labels, then fmt  determines  how
     the labels are arranged on the screen.  Setting fmt to 0 in-
     dicates a 3-2-3 arrangement of the labels, 1 indicates a 4-4
     arrangement  and  2 indicates the PC like 4-4-4 mode. If fmt
     is set to 3, it is again the PC like 4-4-4 mode, but in  ad-
     dition an index line is generated, helping the user to iden-
     tify the key numbers easily.

     The slk_set routine requires labnum to be	a  label  number,

MirOS BSD #10-current	Printed 18.8.2011			1

curs_slk(3)	    UNIX Programmer's Manual	      curs_slk(3)

     from  1  to 8 (resp. 12); label 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. fmt
     is either 0, 1, or 2, indicating whether the label is  to be
     left-justified,  centered, or right-justified, respectively,
     within the label.

     The slk_refresh and slk_noutrefresh routines  correspond  to
     the wrefresh and wnoutrefresh routines.

     The slk_label routine returns the current	label  for  label
     number labnum, with leading and trailing blanks stripped.

     The slk_clear  routine  clears  the  soft	labels	from  the
     screen.

     The slk_restore routine restores  the  soft  labels  to  the
     screen after a slk_clear has been performed.

     The slk_touch routine forces all the soft labels to be  out-
     put the next time a slk_noutrefresh is performed.

     The slk_attron, slk_attrset, slk_attroff and  slk_attr  rou-
     tines  correspond	to attron, attrset, attroff and attr_get.
     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 System V curses,	 which	does  not
     document this fact).

     The slk_color routine corresponds to color_set.  It  has  an
     effect  only if soft labels are simulated on the bottom line
     of the screen.

RETURN VALUE
     These routines return ERR upon failure and OK  (SVr4  speci-
     fies only "an integer value other than ERR") upon successful
     completion.

     X/Open defines no error conditions. In this implementation

	  slk_attr
	       returns the attribute used for the soft keys.

	  slk_refresh, slk_touch
	  slk_attroff, slk_attron, slk_clear, slk_noutrefresh,
	       return an error if the terminal	or  the	 softkeys
	       were not initialized.

	  slk_attrset
	       returns an error if the terminal or  the	 softkeys
	       were not initialized.

MirOS BSD #10-current	Printed 18.8.2011			2

curs_slk(3)	    UNIX Programmer's Manual	      curs_slk(3)

	  slk_attr_set
	       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.

	  slk_color
	       returns an error if the terminal or  the	 softkeys
	       were not initialized, or the color pair is outside
	       the range 0..COLOR_PAIRS-1.

	  slk_init
	       returns an error if the format parameter	 is  out-
	       side the range 0..3.

	  slk_label
	       returns NULL on error.

	  slk_set
	       returns an error if the terminal or  the	 softkeys
	       were  not  initialized, or the labnum parameter is
	       outside the range of label counts, or if the  for-
	       mat  parameter  is  outside  the range 0..2, or if
	       memory for the labels cannot be allocated.

NOTES
     Most  applications	 would	use  slk_noutrefresh  because	a
     wrefresh is likely to follow soon.

PORTABILITY
     The XSI Curses standard, Issue 4, describes these functions.
     It	 changes  the argument type of the attribute-manipulation
     functions slk_attron, slk_attroff, slk_attrset to be attr_t,
     and  adds	const  qualifiers.  The	 format codes 2 and 3 for
     slk_init()	 and  the  function  slk_attr  are  specific   to
     ncurses.

SEE ALSO
     curses(3), curs_attr(3), curs_initscr(3), curs_refresh(3)

MirOS BSD #10-current	Printed 18.8.2011			3

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