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29 .\" $Id: curs_slk.3x,v 1.19 2010/09/11 22:35:11 tom Exp $
38 \fBslk_noutrefresh\fR,
50 \fBslk_color\fR \- \fBcurses\fR soft label routines
54 \fB#include <curses.h>\fR
56 \fBint slk_init(int fmt);\fR
58 \fBint slk_set(int labnum, const char *label, int fmt);\fR
60 \fBint slk_refresh(void);\fR
62 \fBint slk_noutrefresh(void);\fR
64 \fBchar *slk_label(int labnum);\fR
66 \fBint slk_clear(void);\fR
68 \fBint slk_restore(void);\fR
70 \fBint slk_touch(void);\fR
72 \fBint slk_attron(const chtype attrs);\fR
74 \fBint slk_attroff(const chtype attrs);\fR
76 \fBint slk_attrset(const chtype attrs);\fR
78 \fBint slk_attr_on(attr_t attrs, void* opts);\fR
80 \fBint slk_attr_off(const attr_t attrs, void * opts);\fR
82 \fBint slk_attr_set(const attr_t attrs,\fR
84 \fBshort color_pair_number, void* opts);\fR
86 \fBattr_t slk_attr(void);\fR
88 \fBint slk_color(short color_pair_number);\fR
90 \fBint slk_wset (int labnum, const wchar_t *label, int fmt);\fR
93 The slk* functions manipulate the set of soft function-key labels that exist on
95 For those terminals that do not have soft labels,
96 \fBcurses\fR takes over the bottom line of \fBstdscr\fR, reducing the size of
97 \fBstdscr\fR and the variable \fBLINES\fR.
98 \fBcurses\fR standardizes on eight
99 labels of up to eight characters each.
100 In addition to this, the ncurses
101 implementation supports a mode where it simulates 12 labels of up to five
103 This is useful for today's PC-like enduser devices.
104 ncurses simulates this mode by taking over up to two lines at
105 the bottom of the screen;
106 it does not try to use any hardware support for this
109 The \fBslk_init\fR routine must be called before \fBinitscr\fR or \fBnewterm\fR
111 If \fBinitscr\fR eventually uses a line from \fBstdscr\fR to
112 emulate the soft labels,
113 then \fIfmt\fR determines how the labels are arranged on the screen:
117 indicates a 3\-2\-3 arrangement of
121 indicates a 4\-4 arrangement
124 indicates the PC-like 4\-4\-4 mode.
127 is again the PC-like 4\-4\-4 mode,
128 but in addition an index line is generated, helping the user to
129 identify the key numbers easily.
132 The \fBslk_set\fR routine
133 (and the \fBslk_wset\fR routine for the wide-character library)
134 has three parameters:
138 is the label number, from \fB1\fR to \fB8\fR
139 (12 for \fIfmt\fP in \fBslk_init\fP is \fB2\fP or \fB3\fP);
142 is be the string to put on the label,
144 (five for \fIfmt\fP in \fBslk_init\fP is \fB2\fP or \fB3\fP)
145 characters in length.
146 A null string or a null pointer sets up a blank label.
150 \fB0\fR, \fB1\fR, or \fB2\fR, indicating whether the label is to be
151 left-justified, centered, or right-justified, respectively, within the
155 The \fBslk_refresh\fR and \fBslk_noutrefresh\fR routines correspond to
156 the \fBwrefresh\fR and \fBwnoutrefresh\fR routines.
158 The \fBslk_label\fR routine returns the current label for label number
159 \fIlabnum\fR, with leading and trailing blanks stripped.
161 The \fBslk_clear\fR routine clears the soft labels from the screen.
163 The \fBslk_restore\fR routine restores the soft labels to the screen
164 after a \fBslk_clear\fR has been performed.
166 The \fBslk_touch\fR routine forces all the soft labels to be output
167 the next time a \fBslk_noutrefresh\fR is performed.
169 The \fBslk_attron\fR, \fBslk_attrset\fR, \fBslk_attroff\fR and \fBslk_attr\fR
170 routines correspond to \fBattron\fR, \fBattrset\fR, \fBattroff\fR and \fBattr_get\fR.
171 They have an effect only if soft labels are simulated on the bottom line of
173 The default highlight for soft keys is A_STANDOUT (as in
174 System V curses, which does not document this fact).
176 The \fBslk_color\fR routine corresponds to \fBcolor_set\fR.
177 It has an effect only
178 if soft labels are simulated on the bottom line of the screen.
181 These routines return \fBERR\fR upon failure and OK (SVr4 specifies only "an
182 integer value other than \fBERR\fR") upon successful completion.
184 X/Open defines no error conditions.
185 In this implementation
189 returns the attribute used for the soft keys.
193 \fBslk_attroff\fP, \fBslk_attron\fP, \fBslk_clear\fP, \fBslk_noutrefresh\fP, \fBslk_refresh\fP, \fBslk_touch\fP
197 if the terminal or the softkeys were not initialized.
201 if the terminal or the softkeys were not initialized.
205 if the terminal or the softkeys were not initialized, or
206 the color pair is outside the range 0..COLOR_PAIRS\-1,
211 if the terminal or the softkeys were not initialized, or
212 the color pair is outside the range 0..COLOR_PAIRS\-1.
216 if the format parameter is outside the range 0..3.
219 returns \fBNULL\fR on error.
223 if the terminal or the softkeys were not initialized, or
224 the \fIlabnum\fP parameter is outside the range of label counts, or
225 if the format parameter is outside the range 0..2, or if
226 memory for the labels cannot be allocated.
229 Most applications would use \fBslk_noutrefresh\fR because a
230 \fBwrefresh\fR is likely to follow soon.
232 The XSI Curses standard, Issue 4, describes these functions.
234 argument type of the attribute-manipulation functions \fBslk_attron\fR,
235 \fBslk_attroff\fR, \fBslk_attrset\fR to be \fBattr_t\fR, and adds \fBconst\fR
237 The format codes \fB2\fR and \fB3\fR for \fBslk_init()\fR and the
238 function \fBslk_attr\fR are specific to ncurses.
240 \fBcurses\fR(3X), \fBcurs_attr\fR(3X), \fBcurs_initscr\fR(3X), \fBcurs_refresh\fR(3X)
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