| blob | f9dd19b29e5630dfa26f3f3040d796d2018ca97a |
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30 .\" $Id: curs_attr.3x,v 1.36 2010/12/04 18:36:44 tom Exp $
31 .TH curs_attr 3 ""
32 .na
33 .hy 0
34 .SH NAME
35 \fBattroff\fR,
36 \fBwattroff\fR,
37 \fBattron\fR,
38 \fBwattron\fR,
39 \fBattrset\fR,
40 \fBwattrset\fR,
41 \fBcolor_set\fR,
42 \fBwcolor_set\fR,
43 \fBstandend\fR,
44 \fBwstandend\fR,
45 \fBstandout\fR,
46 \fBwstandout\fR,
47 \fBattr_get\fR,
48 \fBwattr_get\fR,
49 \fBattr_off\fR,
50 \fBwattr_off\fR,
51 \fBattr_on\fR,
52 \fBwattr_on\fR,
53 \fBattr_set\fR,
54 \fBwattr_set\fR,
55 \fBchgat\fR,
56 \fBwchgat\fR,
57 \fBmvchgat\fR,
58 \fBmvwchgat\fR,
59 \fBPAIR_NUMBER\fR \- \fBcurses\fR character and window attribute control routines
60 .ad
61 .hy
62 .SH SYNOPSIS
63 \fB#include <curses.h>\fR
64 .br
65 \fBint attroff(int attrs);\fR
66 .br
67 \fBint wattroff(WINDOW *win, int attrs);\fR
68 .br
69 \fBint attron(int attrs);\fR
70 .br
71 \fBint wattron(WINDOW *win, int attrs);\fR
72 .br
73 \fBint attrset(int attrs);\fR
74 .br
75 \fBint wattrset(WINDOW *win, int attrs);\fR
76 .br
77 \fBint color_set(short color_pair_number, void* opts);\fR
78 .br
79 \fBint wcolor_set(WINDOW *win, short color_pair_number,\fR
80 \fBvoid* opts);\fR
81 .br
82 \fBint standend(void);\fR
83 .br
84 \fBint wstandend(WINDOW *win);\fR
85 .br
86 \fBint standout(void);\fR
87 .br
88 \fBint wstandout(WINDOW *win);\fR
89 .br
90 \fBint attr_get(attr_t *attrs, short *pair, void *opts);\fR
91 .br
92 \fBint wattr_get(WINDOW *win, attr_t *attrs, short *pair,\fR
93 \fBvoid *opts);\fR
94 .br
95 \fBint attr_off(attr_t attrs, void *opts);\fR
96 .br
97 \fBint wattr_off(WINDOW *win, attr_t attrs, void *opts);\fR
98 .br
99 \fBint attr_on(attr_t attrs, void *opts);\fR
100 .br
101 \fBint wattr_on(WINDOW *win, attr_t attrs, void *opts);\fR
102 .br
103 \fBint attr_set(attr_t attrs, short pair, void *opts);\fR
104 .br
105 \fBint wattr_set(WINDOW *win, attr_t attrs, short pair, void *opts);\fR
106 .br
107 \fBint chgat(int n, attr_t attr, short color,\fR
108 \fBconst void *opts)\fR
109 .br
110 \fBint wchgat(WINDOW *win, int n, attr_t attr,\fR
111 \fBshort color, const void *opts)\fR
112 .br
113 \fBint mvchgat(int y, int x, int n, attr_t attr,\fR
114 \fBshort color, const void *opts)\fR
115 .br
116 \fBint mvwchgat(WINDOW *win, int y, int x, int n,\fR
117 \fBattr_t attr, short color, const void *opts)\fR
118 .br
119 .SH DESCRIPTION
120 These routines manipulate the current attributes of the named window. The
121 current attributes of a window apply to all characters that are written into
122 the window with \fBwaddch\fR, \fBwaddstr\fR and \fBwprintw\fR. Attributes are
123 a property of the character, and move with the character through any scrolling
124 and insert/delete line/character operations. To the extent possible, they are
125 displayed as appropriate modifications to the graphic rendition of characters
126 put on the screen.
127 .PP
128 The routine \fBattrset\fR sets the current attributes of the given window to
129 \fIattrs\fR. The routine \fBattroff\fR turns off the named attributes without
130 turning any other attributes on or off. The routine \fBattron\fR turns on the
131 named attributes without affecting any others. The routine \fBstandout\fR is
132 the same as \fBattron(A_STANDOUT)\fR. The routine \fBstandend\fR is the same
133 as \fBattrset(A_NORMAL)\fR or \fBattrset(0)\fR, that is, it turns off all
134 attributes.
135 .PP
136 The \fBattrset\fR and related routines do not affect the attributes used
137 when erasing portions of the window.
138 See \fBcurs_bkgd\fR(3) for functions which modify the attributes used for
139 erasing and clearing.
140 .PP
141 The routine \fBcolor_set\fR sets the current color of the given window to the
142 foreground/background combination described by the color_pair_number. The
143 parameter opts is reserved for future use, applications must supply a null
144 pointer.
145 .PP
146 The routine \fBwattr_get\fR returns the current attribute and color pair for
147 the given window; \fBattr_get\fR returns the current attribute and color pair
148 for \fBstdscr\fR.
149 The remaining \fBattr_\fR* functions operate exactly like the corresponding
150 \fBattr\fR* functions, except that they take arguments of type \fBattr_t\fR
151 rather than \fBint\fR.
152 .PP
153 The routine \fBchgat\fR changes the attributes of a given number of characters
154 starting at the current cursor location of \fBstdscr\fR. It does not update
155 the cursor and does not perform wrapping. A character count of \-1 or greater
156 than the remaining window width means to change attributes all the way to the
157 end of the current line. The \fBwchgat\fR function generalizes this to any
158 window; the \fBmvwchgat\fR function does a cursor move before acting. In these
159 functions, the color argument is a color-pair index (as in the first argument
160 of \fIinit_pair\fR, see \fBcurs_color\fR(3)). The \fBopts\fR argument is not
161 presently used, but is reserved for the future (leave it \fBNULL\fR).
162 .SS Attributes
163 The following video attributes, defined in \fB<curses.h>\fR, can be passed to
164 the routines \fBattron\fR, \fBattroff\fR, and \fBattrset\fR, or OR'd with the
165 characters passed to \fBaddch\fR.
166 .PP
167 .TS
168 center ;
169 l l .
170 \fBA_NORMAL\fR Normal display (no highlight)
171 \fBA_STANDOUT\fR Best highlighting mode of the terminal.
172 \fBA_UNDERLINE\fR Underlining
173 \fBA_REVERSE\fR Reverse video
174 \fBA_BLINK\fR Blinking
175 \fBA_DIM\fR Half bright
176 \fBA_BOLD\fR Extra bright or bold
177 \fBA_PROTECT\fR Protected mode
178 \fBA_INVIS\fR Invisible or blank mode
179 \fBA_ALTCHARSET\fR Alternate character set
180 \fBA_CHARTEXT\fR Bit-mask to extract a character
181 \fBCOLOR_PAIR(\fR\fIn\fR\fB)\fR Color-pair number \fIn\fR
182 .TE
183 .PP
184 The following macro is the reverse of \fBCOLOR_PAIR(\fR\fIn\fR\fB)\fR:
185 .PP
186 .br
187 \fBPAIR_NUMBER(\fR\fIattrs\fR) Returns the pair number associated
188 with the \fBCOLOR_PAIR(\fR\fIn\fR\fB)\fR attribute.
189 .br
190 .PP
191 The return values of many of these routines are not meaningful (they are
192 implemented as macro-expanded assignments and simply return their argument).
193 The SVr4 manual page claims (falsely) that these routines always return \fB1\fR.
194 .SH NOTES
195 Note that \fBattroff\fR, \fBwattroff\fR, \fBattron\fR, \fBwattron\fR,
196 \fBattrset\fR, \fBwattrset\fR, \fBstandend\fR and \fBstandout\fR may be macros.
197 .PP
198 \fBCOLOR_PAIR\fP values can only be OR'd with attributes if the pair
199 number is less than 256.
200 The alternate functions such as \fBcolor_set\fP can pass a color pair
201 value directly.
202 However, ncurses ABI 4 and 5 simply OR this value within the alternate functions.
203 You must use ncurses ABI 6 to support more than 256 color pairs.
204 .SH PORTABILITY
205 These functions are supported in the XSI Curses standard, Issue 4. The
206 standard defined the dedicated type for highlights, \fBattr_t\fR, which is not
207 defined in SVr4 curses. The functions taking \fBattr_t\fR arguments are
208 not supported under SVr4.
209 .PP
210 The XSI Curses standard states that whether the traditional functions
211 \fBattron\fR/\fBattroff\fR/\fBattrset\fR can manipulate attributes other than
212 \fBA_BLINK\fR, \fBA_BOLD\fR, \fBA_DIM\fR, \fBA_REVERSE\fR, \fBA_STANDOUT\fR, or
213 \fBA_UNDERLINE\fR is "unspecified". Under this implementation as well as
214 SVr4 curses, these functions correctly manipulate all other highlights
215 (specifically, \fBA_ALTCHARSET\fR, \fBA_PROTECT\fR, and \fBA_INVIS\fR).
216 .PP
217 XSI Curses added the new entry points, \fBattr_get\fR, \fBattr_on\fR,
218 \fBattr_off\fR, \fBattr_set\fR, \fBwattr_on\fR, \fBwattr_off\fR,
219 \fBwattr_get\fR, \fBwattr_set\fR. These are intended to work with
220 a new series of highlight macros prefixed with \fBWA_\fR.
221 .PP
222 Older versions of this library did not force an update of the screen
223 when changing the attributes.
224 Use \fBtouchwin\fR to force the screen to match the updated attributes.
225 .PP
226 .ne 9
227 .TS
228 center ;
229 l l .
230 \fBWA_NORMAL\fR Normal display (no highlight)
231 \fBWA_STANDOUT\fR Best highlighting mode of the terminal.
232 \fBWA_UNDERLINE\fR Underlining
233 \fBWA_REVERSE\fR Reverse video
234 \fBWA_BLINK\fR Blinking
235 \fBWA_DIM\fR Half bright
236 \fBWA_BOLD\fR Extra bright or bold
237 \fBWA_ALTCHARSET\fR Alternate character set
238 .TE
239 .PP
240 The XSI curses standard specifies that each pair of corresponding \fBA_\fR
241 and \fBWA_\fR-using functions operates on the same current-highlight
242 information.
243 .PP
244 The XSI standard extended conformance level adds new highlights
245 \fBA_HORIZONTAL\fR, \fBA_LEFT\fR, \fBA_LOW\fR, \fBA_RIGHT\fR, \fBA_TOP\fR,
246 \fBA_VERTICAL\fR (and corresponding \fBWA_\fR macros for each) which this
247 implementation does not yet support.
248 .SH RETURN VALUE
249 All routines return the integer \fBOK\fR on success, or \fBERR\fP on failure.
250 .PP
251 X/Open does not define any error conditions.
252 .PP
253 This implementation returns an error
254 if the window pointer is null.
255 The \fBwcolor_set\fP function returns an error if the color pair parameter
256 is outside the range 0..COLOR_PAIRS\-1.
257 This implementation also provides
258 \fBgetattrs\fR
259 for compatibility with older versions of curses.
260 .PP
261 Functions with a "mv" prefix first perform a cursor movement using
262 \fBwmove\fP, and return an error if the position is outside the window,
263 or if the window pointer is null.
264 .SH SEE ALSO
265 \fBcurses\fR(3),
266 \fBcurs_addch\fR(3),
267 \fBcurs_addstr\fR(3),
268 \fBcurs_bkgd\fR(3),
269 \fBcurs_printw\fR(3),
270 \fBcurs_variables\fR(3)