doc/html/man/curs_attr.3x.html

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  42 <H1>curs_attr 3x</H1>
  43 <HR>
  44 <PRE>
  45 <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>                                             <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>
  46
  47
  48
  49
  50 </PRE>
  51 <H2><a name="h2-NAME">NAME</a></H2><PRE>
  52        <STRONG>attroff</STRONG>, <STRONG>wattroff</STRONG>, <STRONG>attron</STRONG>, <STRONG>wattron</STRONG>, <STRONG>attrset</STRONG>, <STRONG>wattrset</STRONG>,
  53        <STRONG>color_set</STRONG>, <STRONG>wcolor_set</STRONG>, <STRONG>standend</STRONG>, <STRONG>wstandend</STRONG>, <STRONG>standout</STRONG>,
  54        <STRONG>wstandout</STRONG>, <STRONG>attr_get</STRONG>, <STRONG>wattr_get</STRONG>, <STRONG>attr_off</STRONG>, <STRONG>wattr_off</STRONG>,
  55        <STRONG>attr_on</STRONG>, <STRONG>wattr_on</STRONG>, <STRONG>attr_set</STRONG>, <STRONG>wattr_set</STRONG>, <STRONG>chgat</STRONG>, <STRONG>wchgat</STRONG>,
  56        <STRONG>mvchgat</STRONG>, <STRONG>mvwchgat</STRONG>, <STRONG>PAIR_NUMBER</STRONG> - <STRONG>curses</STRONG> character and
  57        window attribute control routines
  58
  59
  60 </PRE>
  61 <H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
  62        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
  63        <STRONG>int</STRONG> <STRONG>attroff(int</STRONG> <STRONG>attrs);</STRONG>
  64        <STRONG>int</STRONG> <STRONG>wattroff(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>attrs);</STRONG>
  65        <STRONG>int</STRONG> <STRONG>attron(int</STRONG> <STRONG>attrs);</STRONG>
  66        <STRONG>int</STRONG> <STRONG>wattron(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>attrs);</STRONG>
  67        <STRONG>int</STRONG> <STRONG>attrset(int</STRONG> <STRONG>attrs);</STRONG>
  68        <STRONG>int</STRONG> <STRONG>wattrset(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>attrs);</STRONG>
  69        <STRONG>int</STRONG> <STRONG>color_set(short</STRONG> <STRONG>color_pair_number,</STRONG> <STRONG>void*</STRONG> <STRONG>opts);</STRONG>
  70        <STRONG>int</STRONG> <STRONG>wcolor_set(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>short</STRONG> <STRONG>color_pair_number,</STRONG>
  71              <STRONG>void*</STRONG> <STRONG>opts);</STRONG>
  72        <STRONG>int</STRONG> <STRONG>standend(void);</STRONG>
  73        <STRONG>int</STRONG> <STRONG>wstandend(WINDOW</STRONG> <STRONG>*win);</STRONG>
  74        <STRONG>int</STRONG> <STRONG>standout(void);</STRONG>
  75        <STRONG>int</STRONG> <STRONG>wstandout(WINDOW</STRONG> <STRONG>*win);</STRONG>
  76        <STRONG>int</STRONG> <STRONG>attr_get(attr_t</STRONG> <STRONG>*attrs,</STRONG> <STRONG>short</STRONG> <STRONG>*pair,</STRONG> <STRONG>void</STRONG> <STRONG>*opts);</STRONG>
  77        <STRONG>int</STRONG> <STRONG>wattr_get(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>attr_t</STRONG> <STRONG>*attrs,</STRONG> <STRONG>short</STRONG> <STRONG>*pair,</STRONG>
  78               <STRONG>void</STRONG> <STRONG>*opts);</STRONG>
  79        <STRONG>int</STRONG> <STRONG>attr_off(attr_t</STRONG> <STRONG>attrs,</STRONG> <STRONG>void</STRONG> <STRONG>*opts);</STRONG>
  80        <STRONG>int</STRONG> <STRONG>wattr_off(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>attr_t</STRONG> <STRONG>attrs,</STRONG> <STRONG>void</STRONG> <STRONG>*opts);</STRONG>
  81        <STRONG>int</STRONG> <STRONG>attr_on(attr_t</STRONG> <STRONG>attrs,</STRONG> <STRONG>void</STRONG> <STRONG>*opts);</STRONG>
  82        <STRONG>int</STRONG> <STRONG>wattr_on(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>attr_t</STRONG> <STRONG>attrs,</STRONG> <STRONG>void</STRONG> <STRONG>*opts);</STRONG>
  83        <STRONG>int</STRONG> <STRONG>attr_set(attr_t</STRONG> <STRONG>attrs,</STRONG> <STRONG>short</STRONG> <STRONG>pair,</STRONG> <STRONG>void</STRONG> <STRONG>*opts);</STRONG>
  84        <STRONG>int</STRONG> <STRONG>wattr_set(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>attr_t</STRONG> <STRONG>attrs,</STRONG> <STRONG>short</STRONG> <STRONG>pair,</STRONG>  <STRONG>void</STRONG>
  85        <STRONG>*opts);</STRONG>
  86        <STRONG>int</STRONG> <STRONG>chgat(int</STRONG> <STRONG>n,</STRONG> <STRONG>attr_t</STRONG> <STRONG>attr,</STRONG> <STRONG>short</STRONG> <STRONG>color,</STRONG>
  87              <STRONG>const</STRONG> <STRONG>void</STRONG> <STRONG>*opts)</STRONG>
  88        <STRONG>int</STRONG> <STRONG>wchgat(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>n,</STRONG> <STRONG>attr_t</STRONG> <STRONG>attr,</STRONG>
  89              <STRONG>short</STRONG> <STRONG>color,</STRONG> <STRONG>const</STRONG> <STRONG>void</STRONG> <STRONG>*opts)</STRONG>
  90        <STRONG>int</STRONG> <STRONG>mvchgat(int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>int</STRONG> <STRONG>n,</STRONG> <STRONG>attr_t</STRONG> <STRONG>attr,</STRONG>
  91              <STRONG>short</STRONG> <STRONG>color,</STRONG> <STRONG>const</STRONG> <STRONG>void</STRONG> <STRONG>*opts)</STRONG>
  92        <STRONG>int</STRONG> <STRONG>mvwchgat(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>int</STRONG> <STRONG>n,</STRONG>
  93              <STRONG>attr_t</STRONG> <STRONG>attr,</STRONG> <STRONG>short</STRONG> <STRONG>color,</STRONG> <STRONG>const</STRONG> <STRONG>void</STRONG> <STRONG>*opts)</STRONG>
  94
  95
  96 </PRE>
  97 <H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
  98        These  routines  manipulate  the current attributes of the
  99        named window.  The current attributes of a window apply to
 100        all characters that are written into the window with <STRONG>wadd-</STRONG>
 101        <STRONG>ch</STRONG>, <STRONG>waddstr</STRONG> and <STRONG>wprintw</STRONG>.  Attributes are a property of the
 102        character,   and  move  with  the  character  through  any
 103        scrolling and insert/delete line/character operations.  To
 104        the  extent  possible,  they  are displayed as appropriate
 105        modifications to the graphic rendition of  characters  put
 106        on the screen.
 107
 108        The  routine  <STRONG>attrset</STRONG>  sets  the current attributes of the
 109        given window to <EM>attrs</EM>.  The routine <STRONG>attroff</STRONG> turns off  the
 110        named  attributes  without turning any other attributes on
 111        or off.  The routine <STRONG>attron</STRONG> turns on the named  attributes
 112        without affecting any others.  The routine <STRONG>standout</STRONG> is the
 113        same as <STRONG>attron(A_STANDOUT)</STRONG>.  The routine <STRONG>standend</STRONG>  is  the
 114        same as <STRONG>attrset(A_NORMAL)</STRONG> or <STRONG>attrset(0)</STRONG>, that is, it turns
 115        off all attributes.
 116
 117        The <STRONG>attrset</STRONG> and related routines do  not  affect  the  at-
 118        tributes  used  when  erasing portions of the window.  See
 119        <STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG> for functions which  modify  the  attributes
 120        used for erasing and clearing.
 121
 122        The  routine <STRONG>color_set</STRONG> sets the current color of the given
 123        window to the foreground/background combination  described
 124        by  the  color_pair_number. The parameter opts is reserved
 125        for future use, applications must supply a null pointer.
 126
 127        The routine <STRONG>wattr_get</STRONG> returns the  current  attribute  and
 128        color pair for the given window; <STRONG>attr_get</STRONG> returns the cur-
 129        rent attribute and color pair for <STRONG>stdscr</STRONG>.   The  remaining
 130        <STRONG>attr_</STRONG>*  functions  operate  exactly like the corresponding
 131        <STRONG>attr</STRONG>* functions, except that they take arguments  of  type
 132        <STRONG>attr_t</STRONG> rather than <STRONG>int</STRONG>.
 133
 134        The routine <STRONG>chgat</STRONG> changes the attributes of a given number
 135        of characters starting at the current cursor  location  of
 136        <STRONG>stdscr</STRONG>.   It  does not update the cursor and does not per-
 137        form wrapping.  A character count of -1  or  greater  than
 138        the  remaining window width means to change attributes all
 139        the way to the end of the current line.  The <STRONG>wchgat</STRONG>  func-
 140        tion generalizes this to any window; the <STRONG>mvwchgat</STRONG> function
 141        does a cursor move before acting.  In these functions, the
 142        color  argument is a color-pair index (as in the first ar-
 143        gument of <EM>init</EM><STRONG>_</STRONG><EM>pair</EM>, see <STRONG><A HREF="curs_color.3x.html">curs_color(3x)</A></STRONG>).  The <STRONG>opts</STRONG>  argu-
 144        ment is not presently used, but is reserved for the future
 145        (leave it <STRONG>NULL</STRONG>).
 146
 147
 148 </PRE>
 149 <H3><a name="h3-Attributes">Attributes</a></H3><PRE>
 150        The following video attributes, defined in <STRONG>&lt;curses.h&gt;</STRONG>, can
 151        be passed to the routines <STRONG>attron</STRONG>, <STRONG>attroff</STRONG>, and <STRONG>attrset</STRONG>, or
 152        OR'd with the characters passed to <STRONG>addch</STRONG>.
 153
 154               <EM>Name</EM>            <EM>Description</EM>
 155               ------------------------------------------------------------
 156               <STRONG>A_NORMAL</STRONG>        Normal display (no highlight)
 157               <STRONG>A_STANDOUT</STRONG>      Best highlighting mode of the terminal.
 158               <STRONG>A_UNDERLINE</STRONG>     Underlining
 159               <STRONG>A_REVERSE</STRONG>       Reverse video
 160               <STRONG>A_BLINK</STRONG>         Blinking
 161               <STRONG>A_DIM</STRONG>           Half bright
 162               <STRONG>A_BOLD</STRONG>          Extra bright or bold
 163               <STRONG>A_PROTECT</STRONG>       Protected mode
 164               <STRONG>A_INVIS</STRONG>         Invisible or blank mode
 165               <STRONG>A_ALTCHARSET</STRONG>    Alternate character set
 166               <STRONG>A_ITALIC</STRONG>        Italics (non-X/Open extension)
 167               <STRONG>A_CHARTEXT</STRONG>      Bit-mask to extract a character
 168               <STRONG>COLOR_PAIR(</STRONG><EM>n</EM><STRONG>)</STRONG>   Color-pair number <EM>n</EM>
 169
 170        These video attributes are supported by <STRONG>attr_on</STRONG> and relat-
 171        ed functions (which also support the attributes recognized
 172        by <STRONG>attron</STRONG>, etc.):
 173
 174               <EM>Name</EM>            <EM>Description</EM>
 175               -----------------------------------------
 176               <STRONG>WA_HORIZONTAL</STRONG>   Horizontal highlight
 177               <STRONG>WA_LEFT</STRONG>         Left highlight
 178               <STRONG>WA_LOW</STRONG>          Low highlight
 179               <STRONG>WA_RIGHT</STRONG>        Right highlight
 180               <STRONG>WA_TOP</STRONG>          Top highlight
 181               <STRONG>WA_VERTICAL</STRONG>     Vertical highlight
 182
 183        For consistency
 184
 185        The following macro is the reverse of <STRONG>COLOR_PAIR(</STRONG><EM>n</EM><STRONG>)</STRONG>:
 186
 187        <STRONG>PAIR_NUMBER(</STRONG><EM>attrs</EM>) Returns the pair number associated
 188                           with the <STRONG>COLOR_PAIR(</STRONG><EM>n</EM><STRONG>)</STRONG> attribute.
 189
 190        The return values of many of these routines are not  mean-
 191        ingful (they are implemented as macro-expanded assignments
 192        and simply return their argument).  The SVr4  manual  page
 193        claims (falsely) that these routines always return <STRONG>1</STRONG>.
 194
 195
 196 </PRE>
 197 <H2><a name="h2-NOTES">NOTES</a></H2><PRE>
 198        Note  that  <STRONG>attroff</STRONG>,  <STRONG>wattroff</STRONG>,  <STRONG>attron</STRONG>, <STRONG>wattron</STRONG>, <STRONG>attrset</STRONG>,
 199        <STRONG>wattrset</STRONG>, <STRONG>standend</STRONG> and <STRONG>standout</STRONG> may be macros.
 200
 201        <STRONG>COLOR_PAIR</STRONG> values can only be OR'd with attributes if  the
 202        pair  number  is  less  than 256.  The alternate functions
 203        such as <STRONG>color_set</STRONG> can pass a color  pair  value  directly.
 204        However,  ncurses  ABI 4 and 5 simply OR this value within
 205        the alternate functions.  You must use ncurses  ABI  6  to
 206        support more than 256 color pairs.
 207
 208
 209 </PRE>
 210 <H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
 211        These  functions are supported in the XSI Curses standard,
 212        Issue 4.  The standard  defined  the  dedicated  type  for
 213        highlights,  <STRONG>attr_t</STRONG>,  which is not defined in SVr4 curses.
 214        The functions taking <STRONG>attr_t</STRONG> arguments  are  not  supported
 215        under SVr4.
 216
 217        The XSI Curses standard states that whether the tradition-
 218        al functions  <STRONG>attron</STRONG>/<STRONG>attroff</STRONG>/<STRONG>attrset</STRONG>  can  manipulate  at-
 219        tributes  other  than  <STRONG>A_BLINK</STRONG>,  <STRONG>A_BOLD</STRONG>, <STRONG>A_DIM</STRONG>, <STRONG>A_REVERSE</STRONG>,
 220        <STRONG>A_STANDOUT</STRONG>, or <STRONG>A_UNDERLINE</STRONG> is "unspecified".   Under  this
 221        implementation  as  well  as  SVr4 curses, these functions
 222        correctly manipulate all other  highlights  (specifically,
 223        <STRONG>A_ALTCHARSET</STRONG>, <STRONG>A_PROTECT</STRONG>, and <STRONG>A_INVIS</STRONG>).
 224
 225        This  implementation  provides  the <STRONG>A_ITALIC</STRONG> attribute for
 226        terminals which have the <EM>enter</EM><STRONG>_</STRONG><EM>italics</EM><STRONG>_</STRONG><EM>mode</EM> (sitm) and <EM>ex-</EM>
 227        <EM>it</EM><STRONG>_</STRONG><EM>italics</EM><STRONG>_</STRONG><EM>mode</EM> (ritm) capabilities.  Italics are not men-
 228        tioned in X/Open  Curses.   Unlike  the  other  video  at-
 229        tributes,  <STRONG>I_ITALIC</STRONG> is unrelated to the <EM>set</EM><STRONG>_</STRONG><EM>attributes</EM> ca-
 230        pabilities.  This implementation makes the assumption that
 231        <EM>exit</EM><STRONG>_</STRONG><EM>attribute</EM><STRONG>_</STRONG><EM>mode</EM> may also reset italics.
 232
 233        XSI  Curses added the new entry points, <STRONG>attr_get</STRONG>, <STRONG>attr_on</STRONG>,
 234        <STRONG>attr_off</STRONG>, <STRONG>attr_set</STRONG>, <STRONG>wattr_on</STRONG>, <STRONG>wattr_off</STRONG>,  <STRONG>wattr_get</STRONG>,  <STRONG>wat-</STRONG>
 235        <STRONG>tr_set</STRONG>.   These  are intended to work with a new series of
 236        highlight macros prefixed with <STRONG>WA_</STRONG>.  The older macros have
 237        direct counterparts in the newer set of names:
 238
 239               <EM>Name</EM>            <EM>Description</EM>
 240               ------------------------------------------------------------
 241               <STRONG>WA_NORMAL</STRONG>       Normal display (no highlight)
 242               <STRONG>WA_STANDOUT</STRONG>     Best highlighting mode of the terminal.
 243               <STRONG>WA_UNDERLINE</STRONG>    Underlining
 244               <STRONG>WA_REVERSE</STRONG>      Reverse video
 245               <STRONG>WA_BLINK</STRONG>        Blinking
 246               <STRONG>WA_DIM</STRONG>          Half bright
 247               <STRONG>WA_BOLD</STRONG>         Extra bright or bold
 248               <STRONG>WA_ALTCHARSET</STRONG>   Alternate character set
 249
 250        Older  versions of this library did not force an update of
 251        the screen when changing the attributes.  Use <STRONG>touchwin</STRONG>  to
 252        force the screen to match the updated attributes.
 253
 254        The XSI curses standard specifies that each pair of corre-
 255        sponding <STRONG>A_</STRONG> and <STRONG>WA_</STRONG>-using functions operates on  the  same
 256        current-highlight information.
 257
 258        The XSI standard extended conformance level adds new high-
 259        lights <STRONG>A_HORIZONTAL</STRONG>, <STRONG>A_LEFT</STRONG>, <STRONG>A_LOW</STRONG>, <STRONG>A_RIGHT</STRONG>, <STRONG>A_TOP</STRONG>, <STRONG>A_VER-</STRONG>
 260        <STRONG>TICAL</STRONG>  (and corresponding <STRONG>WA_</STRONG> macros for each).  As of Au-
 261        gust 2013, no known  terminal  provides  these  highlights
 262        (i.e., via the <STRONG>sgr1</STRONG> capability).
 263
 264
 265 </PRE>
 266 <H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
 267        All  routines  return the integer <STRONG>OK</STRONG> on success, or <STRONG>ERR</STRONG> on
 268        failure.
 269
 270        X/Open does not define any error conditions.
 271
 272        This implementation returns an error if the window pointer
 273        is  null.  The <STRONG>wcolor_set</STRONG> function returns an error if the
 274        color  pair  parameter  is  outside  the   range   0..COL-
 275        OR_PAIRS-1.   This  implementation  also provides <STRONG>getattrs</STRONG>
 276        for compatibility with older versions of curses.
 277
 278        Functions with a "mv" prefix first perform a cursor  move-
 279        ment  using  <STRONG>wmove</STRONG>, and return an error if the position is
 280        outside the window, or if the window pointer is null.
 281
 282
 283 </PRE>
 284 <H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
 285        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>,        <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>,        <STRONG><A HREF="curs_addstr.3x.html">curs_addstr(3x)</A></STRONG>,
 286        <STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG>, <STRONG><A HREF="curs_printw.3x.html">curs_printw(3x)</A></STRONG>, <STRONG><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>
 287
 288
 289
 290                                                           <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>
 291 </PRE>
 292 <div class="nav">
 293 <ul>
 294 <li><a href="#h2-NAME">NAME</a></li>
 295 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 296 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
 297 <ul>
 298 <li><a href="#h3-Attributes">Attributes</a></li>
 299 </ul>
 300 </li>
 301 <li><a href="#h2-NOTES">NOTES</a></li>
 302 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
 303 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
 304 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
 305 </ul>
 306 </div>
 307 </BODY>
 308 </HTML>