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29 * @Id: curs_slk.3x,v 1.22 2010/12/04 18:38:55 tom Exp @
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41 <H1 class="no-header">curs_slk 3x</H1>
43 <STRONG><A HREF="curs_slk.3x.html">curs_slk(3x)</A></STRONG> <STRONG><A HREF="curs_slk.3x.html">curs_slk(3x)</A></STRONG>
48 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
49 <STRONG>slk_init</STRONG>, <STRONG>slk_set</STRONG>, <STRONG>slk_wset</STRONG>, <STRONG>slk_refresh</STRONG>, <STRONG>slk_noutrefresh</STRONG>,
50 <STRONG>slk_label</STRONG>, <STRONG>slk_clear</STRONG>, <STRONG>slk_restore</STRONG>, <STRONG>slk_touch</STRONG>, <STRONG>slk_attron</STRONG>,
51 <STRONG>slk_attrset</STRONG>, <STRONG>slk_attroff</STRONG>, <STRONG>slk_attr_on</STRONG>, <STRONG>slk_attr_set</STRONG>,
52 <STRONG>slk_attr_off</STRONG>, <STRONG>slk_attr</STRONG>, <STRONG>slk_color</STRONG> - <STRONG>curses</STRONG> soft label
56 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
57 <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
59 <STRONG>int</STRONG> <STRONG>slk_init(int</STRONG> <STRONG>fmt);</STRONG>
60 <STRONG>int</STRONG> <STRONG>slk_set(int</STRONG> <STRONG>labnum,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*label,</STRONG> <STRONG>int</STRONG> <STRONG>fmt);</STRONG>
61 <STRONG>int</STRONG> <STRONG>slk_refresh(void);</STRONG>
62 <STRONG>int</STRONG> <STRONG>slk_noutrefresh(void);</STRONG>
63 <STRONG>char</STRONG> <STRONG>*slk_label(int</STRONG> <STRONG>labnum);</STRONG>
64 <STRONG>int</STRONG> <STRONG>slk_clear(void);</STRONG>
65 <STRONG>int</STRONG> <STRONG>slk_restore(void);</STRONG>
66 <STRONG>int</STRONG> <STRONG>slk_touch(void);</STRONG>
67 <STRONG>int</STRONG> <STRONG>slk_attron(const</STRONG> <STRONG>chtype</STRONG> <STRONG>attrs);</STRONG>
68 <STRONG>int</STRONG> <STRONG>slk_attroff(const</STRONG> <STRONG>chtype</STRONG> <STRONG>attrs);</STRONG>
69 <STRONG>int</STRONG> <STRONG>slk_attrset(const</STRONG> <STRONG>chtype</STRONG> <STRONG>attrs);</STRONG>
70 <STRONG>int</STRONG> <STRONG>slk_attr_on(attr_t</STRONG> <STRONG>attrs,</STRONG> <STRONG>void*</STRONG> <STRONG>opts);</STRONG>
71 <STRONG>int</STRONG> <STRONG>slk_attr_off(const</STRONG> <STRONG>attr_t</STRONG> <STRONG>attrs,</STRONG> <STRONG>void</STRONG> <STRONG>*</STRONG> <STRONG>opts);</STRONG>
72 <STRONG>int</STRONG> <STRONG>slk_attr_set(const</STRONG> <STRONG>attr_t</STRONG> <STRONG>attrs,</STRONG> <STRONG>short</STRONG> <STRONG>color_pair,</STRONG>
73 <STRONG>void*</STRONG> <STRONG>opts);</STRONG>
74 <STRONG>attr_t</STRONG> <STRONG>slk_attr(void);</STRONG>
75 <STRONG>int</STRONG> <STRONG>slk_color(short</STRONG> <STRONG>color_pair);</STRONG>
76 <STRONG>int</STRONG> <STRONG>slk_wset(int</STRONG> <STRONG>labnum,</STRONG> <STRONG>const</STRONG> <STRONG>wchar_t</STRONG> <STRONG>*label,</STRONG> <STRONG>int</STRONG> <STRONG>fmt);</STRONG>
79 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
80 The slk* functions manipulate the set of soft function-key
81 labels that exist on many terminals. For those terminals
82 that do not have soft labels, <STRONG>curses</STRONG> takes over the bottom
83 line of <STRONG>stdscr</STRONG>, reducing the size of <STRONG>stdscr</STRONG> and the vari-
84 able <STRONG>LINES</STRONG>. <STRONG>curses</STRONG> standardizes on eight labels of up to
85 eight characters each. In addition to this, the ncurses
86 implementation supports a mode where it simulates 12 la-
87 bels of up to five characters each. This is useful for
88 today's PC-like enduser devices. ncurses simulates this
89 mode by taking over up to two lines at the bottom of the
90 screen; it does not try to use any hardware support for
93 The <STRONG>slk_init</STRONG> routine must be called before <STRONG>initscr</STRONG> or
94 <STRONG>newterm</STRONG> is called. If <STRONG>initscr</STRONG> eventually uses a line from
95 <STRONG>stdscr</STRONG> to emulate the soft labels, then <EM>fmt</EM> determines how
96 the labels are arranged on the screen:
98 <STRONG>0</STRONG> indicates a 3-2-3 arrangement of the labels.
100 <STRONG>1</STRONG> indicates a 4-4 arrangement
102 <STRONG>2</STRONG> indicates the PC-like 4-4-4 mode.
104 <STRONG>3</STRONG> is again the PC-like 4-4-4 mode, but in addition
105 an index line is generated, helping the user to
106 identify the key numbers easily.
108 The <STRONG>slk_set</STRONG> routine (and the <STRONG>slk_wset</STRONG> routine for the
109 wide-character library) has three parameters:
112 is the label number, from <STRONG>1</STRONG> to <STRONG>8</STRONG> (12 for <EM>fmt</EM>
113 in <STRONG>slk_init</STRONG> is <STRONG>2</STRONG> or <STRONG>3</STRONG>);
116 is be the string to put on the label, up to
117 eight (five for <EM>fmt</EM> in <STRONG>slk_init</STRONG> is <STRONG>2</STRONG> or <STRONG>3</STRONG>)
118 characters in length. A null string or a null
119 pointer sets up a blank label.
121 <EM>fmt</EM> is either <STRONG>0</STRONG>, <STRONG>1</STRONG>, or <STRONG>2</STRONG>, indicating whether the
122 label is to be left-justified, centered, or
123 right-justified, respectively, within the la-
126 The <STRONG>slk_refresh</STRONG> and <STRONG>slk_noutrefresh</STRONG> routines correspond to
127 the <STRONG>wrefresh</STRONG> and <STRONG>wnoutrefresh</STRONG> routines.
129 The <STRONG>slk_label</STRONG> routine returns the current label for label
130 number <EM>labnum</EM>, with leading and trailing blanks stripped.
132 The <STRONG>slk_clear</STRONG> routine clears the soft labels from the
135 The <STRONG>slk_restore</STRONG> routine restores the soft labels to the
136 screen after a <STRONG>slk_clear</STRONG> has been performed.
138 The <STRONG>slk_touch</STRONG> routine forces all the soft labels to be
139 output the next time a <STRONG>slk_noutrefresh</STRONG> is performed.
141 The <STRONG>slk_attron</STRONG>, <STRONG>slk_attrset</STRONG>, <STRONG>slk_attroff</STRONG> and <STRONG>slk_attr</STRONG> rou-
142 tines correspond to <STRONG>attron</STRONG>, <STRONG>attrset</STRONG>, <STRONG>attroff</STRONG> and <STRONG>attr_get</STRONG>.
143 They have an effect only if soft labels are simulated on
144 the bottom line of the screen. The default highlight for
145 soft keys is A_STANDOUT (as in System V curses, which does
146 not document this fact).
148 The <STRONG>slk_color</STRONG> routine corresponds to <STRONG>color_set</STRONG>. It has an
149 effect only if soft labels are simulated on the bottom
153 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
154 These routines return <STRONG>ERR</STRONG> upon failure and OK (SVr4 speci-
155 fies only "an integer value other than <STRONG>ERR</STRONG>") upon success-
158 X/Open defines no error conditions. In this implementa-
161 <STRONG>slk_attr</STRONG>
162 returns the attribute used for the soft keys.
164 <STRONG>slk_attroff</STRONG>, <STRONG>slk_attron</STRONG>, <STRONG>slk_clear</STRONG>,
165 <STRONG>slk_noutrefresh</STRONG>, <STRONG>slk_refresh</STRONG>, <STRONG>slk_touch</STRONG>
166 return an error if the terminal or the soft-
167 keys were not initialized.
169 <STRONG>slk_attrset</STRONG>
170 returns an error if the terminal or the soft-
171 keys were not initialized.
173 <STRONG>slk_attr_set</STRONG>
174 returns an error if the terminal or the soft-
175 keys were not initialized, or the color pair
176 is outside the range 0..COLOR_PAIRS-1, or opts
179 <STRONG>slk_color</STRONG>
180 returns an error if the terminal or the soft-
181 keys were not initialized, or the color pair
182 is outside the range 0..COLOR_PAIRS-1.
184 <STRONG>slk_init</STRONG>
185 returns an error if the format parameter is
186 outside the range 0..3.
188 <STRONG>slk_label</STRONG>
189 returns <STRONG>NULL</STRONG> on error.
191 <STRONG>slk_set</STRONG>
192 returns an error if the terminal or the soft-
193 keys were not initialized, or the <EM>labnum</EM> pa-
194 rameter is outside the range of label counts,
195 or if the format parameter is outside the
196 range 0..2, or if memory for the labels cannot
200 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
201 Most applications would use <STRONG>slk_noutrefresh</STRONG> because a <STRONG>wre-</STRONG>
202 <STRONG>fresh</STRONG> is likely to follow soon.
205 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
206 The XSI Curses standard, Issue 4, describes these func-
207 tions. It changes the argument type of the attribute-ma-
208 nipulation functions <STRONG>slk_attron</STRONG>, <STRONG>slk_attroff</STRONG>, <STRONG>slk_attrset</STRONG>
209 to be <STRONG>attr_t</STRONG>, and adds <STRONG>const</STRONG> qualifiers. The format codes
210 <STRONG>2</STRONG> and <STRONG>3</STRONG> for <STRONG>slk_init()</STRONG> and the function <STRONG>slk_attr</STRONG> are spe-
214 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
215 <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>, <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>, <STRONG>curs_re-</STRONG>
216 <STRONG><A HREF="curs_refresh.3x.html">fresh(3x)</A></STRONG>, <STRONG><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>.
220 <STRONG><A HREF="curs_slk.3x.html">curs_slk(3x)</A></STRONG>
224 <li><a href="#h2-NAME">NAME</a></li>
225 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
226 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
227 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
228 <li><a href="#h2-NOTES">NOTES</a></li>
229 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
230 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>