1curs_attr(3X)                                                    curs_attr(3X)
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4

NAME

6       attroff, wattroff, attron, wattron, attrset, wattrset, color_set,
7       wcolor_set, standend, wstandend, standout, wstandout, attr_get,
8       wattr_get, attr_off, wattr_off, attr_on, wattr_on, attr_set, wattr_set,
9       chgat, wchgat, mvchgat, mvwchgat, PAIR_NUMBER - curses character and
10       window attribute control routines
11

SYNOPSIS

13       #include <curses.h>
14       int attroff(int attrs);
15       int wattroff(WINDOW *win, int attrs);
16       int attron(int attrs);
17       int wattron(WINDOW *win, int attrs);
18       int attrset(int attrs);
19       int wattrset(WINDOW *win, int attrs);
20       int color_set(short color_pair_number, void* opts);
21       int wcolor_set(WINDOW *win, short color_pair_number,
22             void* opts);
23       int standend(void);
24       int wstandend(WINDOW *win);
25       int standout(void);
26       int wstandout(WINDOW *win);
27       int attr_get(attr_t *attrs, short *pair, void *opts);
28       int wattr_get(WINDOW *win, attr_t *attrs, short *pair,
29              void *opts);
30       int attr_off(attr_t attrs, void *opts);
31       int wattr_off(WINDOW *win, attr_t attrs, void *opts);
32       int attr_on(attr_t attrs, void *opts);
33       int wattr_on(WINDOW *win, attr_t attrs, void *opts);
34       int attr_set(attr_t attrs, short pair, void *opts);
35       int wattr_set(WINDOW *win, attr_t attrs, short pair, void *opts);
36       int chgat(int n, attr_t attr, short color,
37             const void *opts)
38       int wchgat(WINDOW *win, int n, attr_t attr,
39             short color, const void *opts)
40       int mvchgat(int y, int x, int n, attr_t attr,
41             short color, const void *opts)
42       int mvwchgat(WINDOW *win, int y, int x, int n,
43             attr_t attr, short color, const void *opts)
44

DESCRIPTION

46       These  routines  manipulate the current attributes of the named window.
47       The current attributes of a window apply to  all  characters  that  are
48       written  into  the window with waddch, waddstr and wprintw.  Attributes
49       are a property of the character, and move with  the  character  through
50       any  scrolling and insert/delete line/character operations.  To the ex‐
51       tent possible, they are displayed as appropriate modifications  to  the
52       graphic rendition of characters put on the screen.
53
54       The  routine attrset sets the current attributes of the given window to
55       attrs.  The routine attroff turns  off  the  named  attributes  without
56       turning  any  other  attributes on or off.  The routine attron turns on
57       the named attributes without affecting any others.  The routine  stand‐
58       out  is  the  same  as attron(A_STANDOUT).  The routine standend is the
59       same as attrset(A_NORMAL) or attrset(0), that is, it turns off all  at‐
60       tributes.
61
62       The attrset and related routines do not affect the attributes used when
63       erasing portions of the window.  See curs_bkgd(3X) for functions  which
64       modify the attributes used for erasing and clearing.
65
66       The routine color_set sets the current color of the given window to the
67       foreground/background combination described by  the  color_pair_number.
68       The parameter opts is reserved for future use, applications must supply
69       a null pointer.
70
71       The routine wattr_get returns the current attribute and color pair  for
72       the given window; attr_get returns the current attribute and color pair
73       for stdscr.  The remaining attr_* functions operate  exactly  like  the
74       corresponding  attr* functions, except that they take arguments of type
75       attr_t rather than int.
76
77       The routine chgat changes the attributes of a given number  of  charac‐
78       ters  starting  at  the current cursor location of stdscr.  It does not
79       update the cursor and does not perform wrapping.  A character count  of
80       -1  or  greater  than  the  remaining  window width means to change at‐
81       tributes all the way to the end of the current line.  The wchgat  func‐
82       tion  generalizes this to any window; the mvwchgat function does a cur‐
83       sor move before acting.  In these functions, the color  argument  is  a
84       color-pair  index (as in the first argument of init_pair, see curs_col‐
85       or(3X)).  The opts argument is not presently used, but is reserved  for
86       the future (leave it NULL).
87
88   Attributes
89       The following video attributes, defined in <curses.h>, can be passed to
90       the routines attron, attroff, and attrset, or OR'd with the  characters
91       passed to addch.
92
93               A_NORMAL        Normal display (no highlight)
94               A_STANDOUT      Best highlighting mode of the terminal.
95               A_UNDERLINE     Underlining
96               A_REVERSE       Reverse video
97               A_BLINK         Blinking
98               A_DIM           Half bright
99               A_BOLD          Extra bright or bold
100               A_PROTECT       Protected mode
101               A_INVIS         Invisible or blank mode
102               A_ALTCHARSET    Alternate character set
103               A_CHARTEXT      Bit-mask to extract a character
104               COLOR_PAIR(n)   Color-pair number n
105
106       The following macro is the reverse of COLOR_PAIR(n):
107
108       PAIR_NUMBER(attrs) Returns the pair number associated
109                          with the COLOR_PAIR(n) attribute.
110
111       The  return  values  of many of these routines are not meaningful (they
112       are implemented as macro-expanded assignments and simply  return  their
113       argument).   The  SVr4 manual page claims (falsely) that these routines
114       always return 1.
115

NOTES

117       Note  that  attroff,  wattroff,  attron,  wattron,  attrset,  wattrset,
118       standend and standout may be macros.
119
120       COLOR_PAIR  values  can only be OR'd with attributes if the pair number
121       is less than 256.  The alternate functions such as color_set can pass a
122       color pair value directly.  However, ncurses ABI 4 and 5 simply OR this
123       value within the alternate functions.  You must use ncurses  ABI  6  to
124       support more than 256 color pairs.
125

PORTABILITY

127       These functions are supported in the XSI Curses standard, Issue 4.  The
128       standard defined the dedicated type for highlights,  attr_t,  which  is
129       not  defined  in SVr4 curses. The functions taking attr_t arguments are
130       not supported under SVr4.
131
132       The XSI Curses standard states that whether the  traditional  functions
133       attron/attroff/attrset  can  manipulate  attributes other than A_BLINK,
134       A_BOLD, A_DIM, A_REVERSE, A_STANDOUT, or A_UNDERLINE is  "unspecified".
135       Under  this implementation as well as SVr4 curses, these functions cor‐
136       rectly manipulate all  other  highlights  (specifically,  A_ALTCHARSET,
137       A_PROTECT, and A_INVIS).
138
139       XSI Curses added the new entry points, attr_get, attr_on, attr_off, at‐
140       tr_set, wattr_on, wattr_off, wattr_get, wattr_set.  These are  intended
141       to work with a new series of highlight macros prefixed with WA_.
142
143       Older  versions  of  this library did not force an update of the screen
144       when changing the attributes.  Use touchwin  to  force  the  screen  to
145       match the updated attributes.
146
147               WA_NORMAL       Normal display (no highlight)
148               WA_STANDOUT     Best highlighting mode of the terminal.
149               WA_UNDERLINE    Underlining
150               WA_REVERSE      Reverse video
151               WA_BLINK        Blinking
152               WA_DIM          Half bright
153               WA_BOLD         Extra bright or bold
154               WA_ALTCHARSET   Alternate character set
155
156       The  XSI  curses  standard specifies that each pair of corresponding A_
157       and WA_-using functions operates on the same current-highlight informa‐
158       tion.
159
160       The XSI standard extended conformance level adds new highlights A_HORI‐
161       ZONTAL, A_LEFT, A_LOW, A_RIGHT, A_TOP,  A_VERTICAL  (and  corresponding
162       WA_ macros for each) which this implementation does not yet support.
163

RETURN VALUE

165       All routines return the integer OK on success, or ERR on failure.
166
167       X/Open does not define any error conditions.
168
169       This  implementation  returns  an  error if the window pointer is null.
170       The wcolor_set function returns an error if the color pair parameter is
171       outside  the range 0..COLOR_PAIRS-1.  This implementation also provides
172       getattrs for compatibility with older versions of curses.
173

SEE ALSO

175       curses(3X),     curs_addch(3X),     curs_addstr(3X),     curs_bkgd(3X),
176       curs_printw(3X)
177
178
179
180                                                                 curs_attr(3X)
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