curs_addwch, addwch, waddwch, mvaddwch, mvwaddwch,
echowchar, wechowchar - Add a wchar_t character (with
attributes) to a Curses window and advance cursor
#include <curses.h>
int addwch(
chtype wch ); int waddwch(
WINDOW *win,
chtype wch ); int mvaddwch(
int y,
int x,
chtype wch ); int mvwaddwch(
WINDOW *win,
int y,
int x,
chtype wch ); int echowchar(
chtype wch ); int wechowchar(
WINDOW *win,
chtype wch );
Curses Library (libcurses)
The addwch, waddwch, mvaddwch, and mvwaddwch routines put
the character wch, holding a wchar_t character, into the
window at the current cursor position of the window and
advance the position of the window cursor. Their function
is similar to that of putwchar in the Standard C Library.
At the right margin, the routines perform an automatic
newline. At the bottom of the scrolling region, if scrollok
is enabled, the routines scroll the scrolling region
up one line.
If wch is a tab, newline, or backspace, the routines move
the cursor appropriately within the window. A newline also
results in clrtoeol before moving. Tabs are considered to
be at every eighth column. If wch is another control character,
it is drawn in the ^X notation. Calling winwch
after adding a control character does not return the control
character, but instead returns the representation of
the control character.
Video attributes can be combined with a wchar_t character
in the parameter by means of an inclusive OR operation.
This operation also sets the attributes. (The intent here
is to allow text, including attributes, to be copied from
one place to another by using inwch and addwch. See the
discussion of standout, predefined video attribute constants,
in the curs_attr(3) reference page.)
The echowchar and wechowchar routines are functionally
equivalent to a call to addwch followed by a call to
refresh, or a call to waddwch followed by a call to wrefresh.
The knowledge that only a single character is being
output is taken into consideration and, for noncontrol
characters, a considerable performance gain may be realized
by using these routines instead of their equivalents.
Line Graphics [Toc] [Back]
The following variables may be used with routines of the
addwch family to add line-drawing characters to the
screen. When variables are defined for the terminal, the
A_ALTCHARSET bit is turned on (see curs_attr(3)). Otherwise,
the default character in the following list is
stored in the variable. The variable names are consistent
with the VT100 nomenclature.
-------------------------------------------------
Name Default Glyph Description
-------------------------------------------------
ACS_ULCORNER + upper left-hand corner
ACS_LLCORNER + lower left-hand corner
ACS_URCORNER + upper right-hand corner
ACS_LRCORNER + lower right-hand corner
ACS_RTEE + right tee
ACS_LTEE + left tee
ACS_BTEE + bottom tee
ACS_TTEE + top tee
ACS_HLINE - horizontal line
ACS_VLINE | vertical line
ACS_PLUS + plus
ACS_S1 - scan line 1
ACS_S9 _ scan line 9
ACS_DIAMOND + diamond
ACS_CKBOARD : checker board (stipple)
ACS_DEGREE ' degree symbol
ACS_PLMINUS # plus/minus
ACS_BULLET o bullet
ACS_LARROW < arrow pointing left
ACS_RARROW > arrow pointing right
ACS_DARROW v arrow pointing down
ACS_UARROW ^ arrow pointing up
ACS_BOARD # board of squares
ACS_LANTERN # lantern symbol
ACS_BLOCK # solid square block
-------------------------------------------------
The header file <curses.h> automatically includes the
header file <stdio.h>.
Note that addwch, mvaddwch, mvwaddwch, and echowchar may
be macros.
The routines described on this reference page are among
the MNLS Curses functions that are not included in the
X/Open Curses CAE specification. MNLS routines are supported
only for backward compatibility reasons. Use the
*add_wch and *echo_wchar functions in new applications
(see curs_add_wch(3)).
All routines return the integer ERR upon failure and OK
upon successful completion, unless otherwise noted in the
preceding routine descriptions.
Functions: curses(3), curs_add_wch(3), curs_attr(3),
curs_clear(3), curs_inch(3), curs_outopts(3),
curs_refresh(3), putwc(3)
curs_addwch(3)
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