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| <TITLE>curs_addch 3x</TITLE> | |
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| <H1>curs_addch 3x</H1> | |
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| <PRE> | |
| <!-- Manpage converted by man2html 3.0.1 --> | |
| <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG> <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG> | |
| </PRE> | |
| <H2>NAME</H2><PRE> | |
| <STRONG>addch</STRONG>, <STRONG>waddch</STRONG>, <STRONG>mvaddch</STRONG>, <STRONG>mvwaddch</STRONG>, <STRONG>echochar</STRONG>, <STRONG>wechochar</STRONG> - | |
| add a character (with attributes) to a <STRONG>curses</STRONG> window, then | |
| advance the cursor | |
| </PRE> | |
| <H2>SYNOPSIS</H2><PRE> | |
| <STRONG>#include</STRONG> <STRONG><curses.h></STRONG> | |
| <STRONG>int</STRONG> <STRONG>addch(const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG> | |
| <STRONG>int</STRONG> <STRONG>waddch(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG> | |
| <STRONG>int</STRONG> <STRONG>mvaddch(int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG> | |
| <STRONG>int</STRONG> <STRONG>mvwaddch(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG> | |
| <STRONG>int</STRONG> <STRONG>echochar(const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG> | |
| <STRONG>int</STRONG> <STRONG>wechochar(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG> | |
| </PRE> | |
| <H2>DESCRIPTION</H2><PRE> | |
| The <STRONG>addch</STRONG>, <STRONG>waddch</STRONG>, <STRONG>mvaddch</STRONG> and <STRONG>mvwaddch</STRONG> routines put the | |
| character <EM>ch</EM> into the given window at its current window | |
| position, which is then advanced. They are analogous to | |
| <STRONG>putchar</STRONG> in <STRONG><A HREF="stdio.3.html">stdio(3)</A></STRONG>. If the advance is at the right mar- | |
| gin, the cursor automatically wraps to the beginning of | |
| the next line. At the bottom of the current scrolling | |
| region, if <STRONG>scrollok</STRONG> is enabled, the scrolling region is | |
| scrolled up one line. | |
| If <EM>ch</EM> is a tab, newline, or backspace, the cursor is moved | |
| appropriately within the window. Backspace moves the cur- | |
| sor one character left; at the left edge of a window it | |
| does nothing. Newline does a <STRONG>clrtoeol</STRONG>, then moves the | |
| cursor to the window left margin on the next line, | |
| scrolling the window if on the last line. Tabs are con- | |
| sidered to be at every eighth column. The tab interval | |
| may be altered by setting the <STRONG>TABSIZE</STRONG> variable. | |
| If <EM>ch</EM> is any control character other than tab, newline, or | |
| backspace, it is drawn in <STRONG>^</STRONG><EM>X</EM> notation. Calling <STRONG>winch</STRONG> | |
| after adding a control character does not return the char- | |
| acter itself, but instead returns the ^-representation of | |
| the control character. | |
| Video attributes can be combined with a character argument | |
| passed to <STRONG>addch</STRONG> or related functions by logical-ORing them | |
| into the character. (Thus, text, including attributes, | |
| can be copied from one place to another using <STRONG>inch</STRONG> and | |
| <STRONG>addch</STRONG>.) See the <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG> page for values of prede- | |
| fined video attribute constants that can be usefully OR'ed | |
| into characters. | |
| The <STRONG>echochar</STRONG> and <STRONG>wechochar</STRONG> routines are equivalent to a | |
| call to <STRONG>addch</STRONG> followed by a call to <STRONG>refresh</STRONG>, or a call to | |
| <STRONG>waddch</STRONG> followed by a call to <STRONG>wrefresh</STRONG>. The knowledge that | |
| only a single character is being output is used and, for | |
| non-control characters, a considerable performance gain | |
| may be seen by using these routines instead of their | |
| equivalents. | |
| <STRONG>Line</STRONG> <STRONG>Graphics</STRONG> | |
| The following variables may be used to add line drawing | |
| characters to the screen with routines of the <STRONG>addch</STRONG> fam- | |
| ily. The default character listed below is used if the | |
| <STRONG>acsc</STRONG> capability does not define a terminal-specific | |
| replacement for it. The names are taken from VT100 | |
| nomenclature. | |
| <EM>Name</EM> <EM>Default</EM> <EM>Description</EM> | |
| -------------------------------------------------- | |
| ACS_BLOCK # solid square block | |
| ACS_BOARD # board of squares | |
| ACS_BTEE + bottom tee | |
| ACS_BULLET o bullet | |
| ACS_CKBOARD : checker board (stipple) | |
| ACS_DARROW v arrow pointing down | |
| ACS_DEGREE ' degree symbol | |
| ACS_DIAMOND + diamond | |
| ACS_GEQUAL > greater-than-or-equal-to | |
| ACS_HLINE - horizontal line | |
| ACS_LANTERN # lantern symbol | |
| ACS_LARROW < arrow pointing left | |
| ACS_LEQUAL < less-than-or-equal-to | |
| ACS_LLCORNER + lower left-hand corner | |
| ACS_LRCORNER + lower right-hand corner | |
| ACS_LTEE + left tee | |
| ACS_NEQUAL ! not-equal | |
| ACS_PI * greek pi | |
| ACS_PLMINUS # plus/minus | |
| ACS_PLUS + plus | |
| ACS_RARROW > arrow pointing right | |
| ACS_RTEE + right tee | |
| ACS_S1 - scan line 1 | |
| ACS_S3 - scan line 3 | |
| ACS_S7 - scan line 7 | |
| ACS_S9 _ scan line 9 | |
| ACS_STERLING f pound-sterling symbol | |
| ACS_TTEE + top tee | |
| ACS_UARROW ^ arrow pointing up | |
| ACS_ULCORNER + upper left-hand corner | |
| ACS_URCORNER + upper right-hand corner | |
| ACS_VLINE | vertical line | |
| </PRE> | |
| <H2>RETURN VALUE</H2><PRE> | |
| All routines return the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> on | |
| success (the SVr4 manuals specify only "an integer value | |
| other than <STRONG>ERR</STRONG>") upon successful completion, unless other- | |
| wise noted in the preceding routine descriptions. | |
| </PRE> | |
| <H2>NOTES</H2><PRE> | |
| Note that <STRONG>addch</STRONG>, <STRONG>mvaddch</STRONG>, <STRONG>mvwaddch</STRONG>, and <STRONG>echochar</STRONG> may be | |
| macros. | |
| </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. | |
| Some ACS symbols (ACS_S3, ACS_S7, ACS_LEQUAL, ACS_GEQUAL, | |
| ACS_PI, ACS_NEQUAL, ACS_STERLING) were not documented in | |
| any publicly released System V. However, many publicly | |
| available terminfos include <STRONG>acsc</STRONG> strings in which their | |
| key characters (pryz{|}) are embedded, and a second-hand | |
| list of their character descriptions has come to light. | |
| The ACS-prefixed names for them were invented for | |
| <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>. | |
| The <STRONG>TABSIZE</STRONG> variable is implemented in some versions of | |
| curses, but is not part of X/Open curses. | |
| If <EM>ch</EM> is a carriage return, the cursor is moved to the | |
| beginning of the current row of the window. This is true | |
| of other implementations, but is not documented. | |
| </PRE> | |
| <H2>SEE ALSO</H2><PRE> | |
| <STRONG><A HREF="ncurses.3x.html">curses(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_inch.3x.html">curs_inch(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="putc.3.html">putc(3)</A></STRONG>. | |
| Comparable functions in the wide-character (ncursesw) | |
| library are described in <STRONG><A HREF="curs_add_wch.3x.html">curs_add_wch(3x)</A></STRONG>. | |
| <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG> | |
| </PRE> | |
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