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29 .\" $Id: curs_slk.3x,v 1.29 2017/03/18 01:00:30 tom Exp $
41 \fBslk_noutrefresh\fR,
53 \fBslk_color\fR \- \fBcurses\fR soft label routines
57 \fB#include <curses.h>\fR
59 \fBint slk_init(int fmt);\fR
61 \fBint slk_set(int labnum, const char *label, int fmt);\fR
63 \fBint slk_wset(int labnum, const wchar_t *label, int fmt);\fR
65 \fBchar *slk_label(int labnum);\fR
67 \fBint slk_refresh(void);\fR
69 \fBint slk_noutrefresh(void);\fR
71 \fBint slk_clear(void);\fR
73 \fBint slk_restore(void);\fR
75 \fBint slk_touch(void);\fR
77 \fBint slk_attron(const chtype attrs);\fR
79 \fBint slk_attroff(const chtype attrs);\fR
81 \fBint slk_attrset(const chtype attrs);\fR
83 \fBint slk_attr_on(attr_t attrs, void* opts);\fR
85 \fBint slk_attr_off(const attr_t attrs, void * opts);\fR
87 \fBint slk_attr_set(const attr_t attrs, short pair, void* opts);\fR
89 \fBattr_t slk_attr(void);\fR
91 \fBint slk_color(short pair);\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 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
110 The \fBslk_init\fR routine must be called before \fBinitscr\fR or \fBnewterm\fR
112 If \fBinitscr\fR eventually uses a line from \fBstdscr\fR to
113 emulate the soft labels,
114 then \fIfmt\fR determines how the labels are arranged on the screen:
118 indicates a 3\-2\-3 arrangement of
122 indicates a 4\-4 arrangement
125 indicates the PC-like 4\-4\-4 mode.
128 is again the PC-like 4\-4\-4 mode,
129 but in addition an index line is generated, helping the user to
130 identify the key numbers easily.
134 The \fBslk_set\fR routine
135 (and the \fBslk_wset\fR routine for the wide-character library)
136 has three parameters:
140 is the label number, from \fB1\fR to \fB8\fR
141 (12 for \fIfmt\fP in \fBslk_init\fP is \fB2\fP or \fB3\fP);
144 is be the string to put on the label,
146 (five for \fIfmt\fP in \fBslk_init\fP is \fB2\fP or \fB3\fP)
147 characters in length.
148 A null string or a null pointer sets up a blank label.
152 \fB0\fR, \fB1\fR, or \fB2\fR, indicating whether the label is to be
153 left-justified, centered, or right-justified, respectively, within the
157 The \fBslk_label\fR routine returns the current label for label number
158 \fIlabnum\fR, with leading and trailing blanks stripped.
161 The \fBslk_refresh\fR and \fBslk_noutrefresh\fR routines correspond to
162 the \fBwrefresh\fR and \fBwnoutrefresh\fR routines.
164 The \fBslk_clear\fR routine clears the soft labels from the screen.
166 The \fBslk_restore\fR routine restores the soft labels to the screen
167 after a \fBslk_clear\fR has been performed.
169 The \fBslk_touch\fR routine forces all the soft labels to be output
170 the next time a \fBslk_noutrefresh\fR is performed.
173 The \fBslk_attron\fR, \fBslk_attrset\fR, \fBslk_attroff\fR and \fBslk_attr\fR
174 routines correspond to \fBattron\fR, \fBattrset\fR, \fBattroff\fR and \fBattr_get\fR.
175 They have an effect only if soft labels are simulated on the bottom line of
177 The default highlight for soft keys is A_STANDOUT (as in
178 System V curses, which does not document this fact).
181 The \fBslk_color\fR routine corresponds to \fBcolor_set\fR.
182 It has an effect only
183 if soft labels are simulated on the bottom line of the screen.
186 These routines return \fBERR\fR upon failure and OK (SVr4 specifies only "an
187 integer value other than \fBERR\fR") upon successful completion.
189 X/Open defines no error conditions.
190 In this implementation
194 returns the attribute used for the soft keys.
198 \fBslk_attroff\fP, \fBslk_attron\fP, \fBslk_clear\fP, \fBslk_noutrefresh\fP, \fBslk_refresh\fP, \fBslk_touch\fP
202 if the terminal or the softkeys were not initialized.
206 if the terminal or the softkeys were not initialized.
210 if the terminal or the softkeys were not initialized, or
211 the color pair is outside the range 0..COLOR_PAIRS\-1,
216 if the terminal or the softkeys were not initialized, or
217 the color pair is outside the range 0..COLOR_PAIRS\-1.
221 if the format parameter is outside the range 0..3.
224 returns \fBNULL\fR on error.
228 if the terminal or the softkeys were not initialized, or
229 the \fIlabnum\fP parameter is outside the range of label counts, or
230 if the format parameter is outside the range 0..2, or if
231 memory for the labels cannot be allocated.
234 Most applications would use \fBslk_noutrefresh\fR because a
235 \fBwrefresh\fR is likely to follow soon.
237 The XSI Curses standard, Issue 4, described the soft-key functions,
238 with some differences from SVr4 curses:
241 added functions like the SVr4
242 the attribute-manipulation functions \fBslk_attron\fR,
243 \fBslk_attroff\fR, \fBslk_attrset\fR
244 which use \fBattr_t\fR parameters,
245 along with a reserved \fIopts\fP parameter.
247 One of these new functions (\fBslk_attr_set\fP) also has a color-pair parameter.
249 It added \fBconst\fR qualifiers to parameters (unnecessarily), and
251 It added \fBslk_color\fP.
253 The format codes \fB2\fR and \fB3\fR for \fBslk_init\fR and the
254 function \fBslk_attr\fR are specific to ncurses.
258 \fBcurs_initscr\fR(3X),
259 \fBcurs_refresh\fR(3X),
260 \fBcurs_variables\fR(3X).