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- * @Id: curs_add_wch.3x,v 1.5 2006/12/02 17:02:35 tom Exp @
+ * @Id: curs_add_wch.3x,v 1.14 2011/01/15 15:27:43 tom Exp @
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perform wrapping and special-character processing as fol-
lows:
- - If <EM>wch</EM> refers to a spacing character, then any previ-
- ous character at that location is removed. A new
- character specified by <EM>wch</EM> is placed at that location
- with rendition specified by <EM>wch</EM>. The cursor then
- advances to the next spacing character on the screen.
+ <STRONG>o</STRONG> If <EM>wch</EM> refers to a spacing character, then any previ-
+ ous character at that location is removed. A new
+ character specified by <EM>wch</EM> is placed at that location
+ with rendition specified by <EM>wch</EM>. The cursor then
+ advances to the next spacing character on the screen.
- - If <EM>wch</EM> refers to a non-spacing character, all previ-
- ous characters at that location are preserved. The
- non-spacing characters of <EM>wch</EM> are added to the spac-
- ing complex character, and the rendition specified by
- <EM>wch</EM> is ignored.
+ <STRONG>o</STRONG> If <EM>wch</EM> refers to a non-spacing character, all previous
+ characters at that location are preserved. The non-
+ spacing characters of <EM>wch</EM> are added to the spacing
+ complex character, and the rendition specified by <EM>wch</EM>
+ is ignored.
- - If the character part of <EM>wch</EM> is a tab, newline,
- backspace or other control character, the window is
- updated and the cursor moves as if <STRONG><A HREF="addch.3x.html">addch(3x)</A></STRONG> were
- called.
+ <STRONG>o</STRONG> If the character part of <EM>wch</EM> is a tab, newline,
+ backspace or other control character, the window is
+ updated and the cursor moves as if <STRONG>addch</STRONG> were called.
The <STRONG>echo_wchar</STRONG> function is functionally equivalent to a
call to <STRONG>add_wch</STRONG> followed by a call to <STRONG>refresh</STRONG>. Similarly,
able performance gain might be seen by using the *<STRONG>echo</STRONG>*
functions instead of their equivalents.
+ <STRONG>Line</STRONG> <STRONG>Graphics</STRONG>
+ Like <STRONG><A HREF="addch.3x.html">addch(3x)</A></STRONG>, <STRONG>addch_wch</STRONG> accepts symbols which make it
+ simple to draw lines and other frequently used special
+ characters. These symbols correspond to the same VT100
+ line-drawing set as <STRONG><A HREF="addch.3x.html">addch(3x)</A></STRONG>.
+
+ <EM>Name</EM> <EM>Unicode</EM> <EM>Default</EM> <EM>Description</EM>
+ ----------------------------------------------------------------
+ WACS_BLOCK 0x25ae # solid square block
+ WACS_BOARD 0x2592 # board of squares
+ WACS_BTEE 0x2534 + bottom tee
+ WACS_BULLET 0x00b7 o bullet
+ WACS_CKBOARD 0x2592 : checker board (stipple)
+
+ WACS_DARROW 0x2193 v arrow pointing down
+ WACS_DEGREE 0x00b0 ' degree symbol
+ WACS_DIAMOND 0x25c6 + diamond
+ WACS_GEQUAL 0x2265 > greater-than-or-equal-to
+ WACS_HLINE 0x2500 - horizontal line
+ WACS_LANTERN 0x2603 # lantern symbol
+ WACS_LARROW 0x2190 < arrow pointing left
+ WACS_LEQUAL 0x2264 < less-than-or-equal-to
+ WACS_LLCORNER 0x2514 + lower left-hand corner
+ WACS_LRCORNER 0x2518 + lower right-hand corner
+ WACS_LTEE 0x2524 + left tee
+ WACS_NEQUAL 0x2260 ! not-equal
+ WACS_PI 0x03c0 * greek pi
+ WACS_PLMINUS 0x00b1 # plus/minus
+ WACS_PLUS 0x253c + plus
+ WACS_RARROW 0x2192 > arrow pointing right
+ WACS_RTEE 0x251c + right tee
+ WACS_S1 0x23ba - scan line 1
+ WACS_S3 0x23bb - scan line 3
+ WACS_S7 0x23bc - scan line 7
+ WACS_S9 0x23bd _ scan line 9
+ WACS_STERLING 0x00a3 f pound-sterling symbol
+ WACS_TTEE 0x252c + top tee
+ WACS_UARROW 0x2191 ^ arrow pointing up
+ WACS_ULCORNER 0x250c + upper left-hand corner
+ WACS_URCORNER 0x2510 + upper right-hand corner
+ WACS_VLINE 0x2502 | vertical line
+
+ The wide-character configuration of ncurses also defines
+ symbols for thick- and double-lines:
+
+ <EM>Name</EM> <EM>Unicode</EM> <EM>Default</EM> <EM>Description</EM>
+ ---------------------------------------------------------------------
+ WACS_T_ULCORNER 0x250f + thick upper left corner
+ WACS_T_LLCORNER 0x2517 + thick lower left corner
+ WACS_T_URCORNER 0x2513 + thick upper right corner
+ WACS_T_LRCORNER 0x251b + thick lower right corner
+ WACS_T_LTEE 0x252b + thick tee pointing right
+ WACS_T_RTEE 0x2523 + thick tee pointing left
+ WACS_T_BTEE 0x253b + thick tee pointing up
+ WACS_T_TTEE 0x2533 + thick tee pointing down
+ WACS_T_HLINE 0x2501 - thick horizontal line
+ WACS_T_VLINE 0x2503 | thick vertical line
+ WACS_T_PLUS 0x254b + thick large plus or crossover
+ WACS_D_ULCORNER 0x2554 + double upper left corner
+ WACS_D_LLCORNER 0x255a + double lower left corner
+ WACS_D_URCORNER 0x2557 + double upper right corner
+ WACS_D_LRCORNER 0x255d + double lower right corner
+ WACS_D_RTEE 0x2563 + double tee pointing left
+ WACS_D_LTEE 0x2560 + double tee pointing right
+ WACS_D_BTEE 0x2569 + double tee pointing up
+ WACS_D_TTEE 0x2566 + double tee pointing down
+ WACS_D_HLINE 0x2550 - double horizontal line
+ WACS_D_VLINE 0x2551 | double vertical line
+ WACS_D_PLUS 0x256c + double large plus or crossover
+
</PRE>
<H2>RETURN VALUES</H2><PRE>
All routines return the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> on
success.
+ Functions with a "mv" prefix first perform a cursor move-
+ ment using <STRONG>wmove</STRONG>, and return an error if the position is
+ outside the window, or if the window pointer is null.
+
</PRE>
<H2>NOTES</H2><PRE>
</PRE>
<H2>PORTABILITY</H2><PRE>
- All these functions are described in the XSI Curses stan-
- dard, Issue 4. The defaults specified for forms-drawing
- characters apply in the POSIX locale.
+ All of these functions are described in the XSI Curses
+ standard, Issue 4. The defaults specified for line-draw-
+ ing characters apply in the POSIX locale.
+
+ X/Open Curses makes it clear that the WACS_ symbols should
+ be defined as a pointer to <STRONG>cchar_t</STRONG> data, e.g., in the dis-
+ cussion of <STRONG>border_set</STRONG>. A few implementations are problem-
+ atic:
+
+ <STRONG>o</STRONG> NetBSD curses defines the symbols as a <STRONG>wchar_t</STRONG> within
+ a <STRONG>cchar_t</STRONG>.
+
+ <STRONG>o</STRONG> HPUX curses equates some of the <EM>ACS</EM><STRONG>_</STRONG> symbols to the
+ analogous <EM>WACS</EM><STRONG>_</STRONG> symbols as if the <EM>ACS</EM><STRONG>_</STRONG> symbols were
+ wide characters. The misdefined symbols are the
+ arrows and other symbols which are not used for line-
+ drawing.
- XSI documents constants beginning with <STRONG>WACS_</STRONG> which are
- used for line-drawing. Those are not currently imple-
- mented in <STRONG>ncurses</STRONG>.
+ X/Open Curses does not define symbols for thick- or dou-
+ ble-lines. SVr4 curses implementations defined their
+ line-drawing symbols in terms of intermediate symbols.
+ This implementation extends those symbols, providing new
+ definitions which are not in the SVr4 implementations.
</PRE>
<H2>SEE ALSO</H2><PRE>
- <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_attr_get.3x.html">curs_attr_get(3x)</A></STRONG>,
- <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>, <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>,
- <STRONG><A HREF="putwc.3.html">putwc(3)</A></STRONG>
+ <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_attr.3x.html">curs_attr(3x)</A></STRONG>, <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>,
+ <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>, <STRONG><A HREF="putwc.3.html">putwc(3)</A></STRONG>
projects / ncurses.git / blobdiff