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- * @Id: curs_attr.3x,v 1.91 2023/12/02 21:05:24 tom Exp @
+ * @Id: curs_attr.3x,v 1.92 2023/12/16 21:07:24 tom Exp @
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-<H1 class="no-header">curs_attr 3x 2023-12-02 ncurses 6.4 Library calls</H1>
+<H1 class="no-header">curs_attr 3x 2023-12-16 ncurses 6.4 Library calls</H1>
<PRE>
<STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>
attr_set(A_BOLD, <EM>pair</EM>, NULL);
However, if the value does not fit, then the <STRONG>COLOR_PAIR</STRONG> macro uses only
- the bits that fit. For example, because in ncurses <STRONG>A_COLOR</STRONG> has eight
+ the bits that fit. For example, because in <EM>ncurses</EM> <STRONG>A_COLOR</STRONG> has eight
(8) bits, then <STRONG>COLOR_PAIR(</STRONG><EM>259</EM><STRONG>)</STRONG> is 4 (i.e., 259 is 4 more than the limit
255).
than <STRONG>attr_t</STRONG>.
There is no corresponding <STRONG>attrget</STRONG> function as such in X/Open Curses,
- although
ncurses provides <STRONG>getattrs</STRONG> (see <STRONG><A HREF="curs_legacy.3x.html">curs_legacy(3x)</A></STRONG>).
+ although
<EM>ncurses</EM> provides <STRONG>getattrs</STRONG> (see <STRONG><A HREF="curs_legacy.3x.html">curs_legacy(3x)</A></STRONG>).
</PRE><H3><a name="h3-Change-character-rendition">Change character rendition</a></H3><PRE>
function generalizes this to any window; the <STRONG>mvwchgat</STRONG> function does a
cursor move before acting.
- In these functions, the color <EM>pair</EM> argument is a color-pair index (as
+ In these functions, the color <EM>pair</EM> argument is a color pair index (as
in the first argument of <STRONG>init_pair</STRONG>, see <STRONG><A HREF="curs_color.3x.html">curs_color(3x)</A></STRONG>).
outside the range 0..COLOR_PAIRS-1.
<STRONG>o</STRONG> does not return an error if either of the parameters of <STRONG>wattr_get</STRONG>
- used for retrieving attribute or color-pair values is <STRONG>NULL</STRONG>.
+ used for retrieving attribute or color pair values is <STRONG>NULL</STRONG>.
Functions with a "mv" prefix first perform a cursor movement using
<STRONG>wmove</STRONG>, and return an error if the position is outside the window, or if
Color pair values can only be OR'd with attributes if the pair number
is less than 256. The alternate functions such as <STRONG>color_set</STRONG> can pass a
- color pair value directly. However, ncurses ABI 4 and 5 simply OR this
- value within the alternate functions. You must use ncurses ABI 6 to
+ color pair value directly. However, <EM>ncurses</EM> ABI 4 and 5 simply OR this
+ value within the alternate functions. You must use <EM>ncurses</EM> ABI 6 to
support more than 256 color pairs.
X/Open Curses still (after more than twenty years) documents as
reserved for future use, saying that it should be <STRONG>NULL</STRONG>. This
implementation uses that parameter in ABI 6 for the functions which
- have a color-pair parameter to support <EM>extended</EM> <EM>color</EM> <EM>pairs</EM>:
+ have a color pair parameter to support <EM>extended</EM> <EM>color</EM> <EM>pairs</EM>:
<STRONG>o</STRONG> For functions which modify the color, e.g., <STRONG>wattr_set</STRONG> and <STRONG>wattr_on</STRONG>,
if <EM>opts</EM> is set it is treated as a pointer to <STRONG>int</STRONG>, and used to set
the same because it simplifies copying information between <STRONG>chtype</STRONG>
and <STRONG>cchar_t</STRONG> variables.
- <STRONG>o</STRONG> Because ncurses's <STRONG>attr_t</STRONG> can hold a color pair (in the <STRONG>A_COLOR</STRONG>
+ <STRONG>o</STRONG> Because <EM>ncurses</EM>'s <STRONG>attr_t</STRONG> can hold a color pair (in the <STRONG>A_COLOR</STRONG>
field), a call to <STRONG>wattr_on</STRONG>, <STRONG>wattr_off</STRONG>, or <STRONG>wattr_set</STRONG> may alter the
window's color. If the color pair information in the attribute
parameter is zero, no change is made to the window's color.
Regarding OSF/1 (and Tru64),
- <STRONG>o</STRONG> These used 64-bit hardware. Like ncurses, the OSF/1 curses
+ <STRONG>o</STRONG> These used 64-bit hardware. Like <EM>ncurses</EM>, the OSF/1 curses
interface is not customized for 32-bit and 64-bit versions.
<STRONG>o</STRONG> Unlike other systems which evolved from AT&T code, OSF/1
modification to make the library 8-bit clean for <STRONG>nvi(1)</STRONG>. He moved
<EM>standout</EM> attribute to a structure member.
- The resulting 4.4BSD curses was replaced by ncurses over the next
+ The resulting 4.4BSD curses was replaced by <EM>ncurses</EM> over the next
ten years.
<STRONG>o</STRONG> U/Win is rarely used now.
-ncurses 6.4 2023-12-
02 <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>
+ncurses 6.4 2023-12-
16 <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>
</PRE>
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