NAME¶
COLORS,
COLOR_PAIRS,
COLS,
ESCDELAY,
LINES,
TABSIZE,
curscr,
newscr,
stdscr -
curses
global variables
SYNOPSIS¶
#include <curses.h>
int COLOR_PAIRS;
int COLORS;
int COLS;
int ESCDELAY;
int LINES;
int TABSIZE;
WINDOW * curscr;
WINDOW * newscr;
WINDOW * stdscr;
DESCRIPTION¶
This page summarizes variables provided by the
curses library. A more
complete description is given in the
curses(3X) manual page.
Depending on the configuration, these may be actual variables, or macros (see
threads(3NCURSES) and
opaque(3NCURSES)) which provide read-only
access to
curses's state. In either case, applications should treat
them as read-only to avoid confusing the library.
COLOR_PAIRS¶
After initializing curses, this variable contains the number of color pairs
which the terminal can support. Usually the number of color pairs will be the
product
COLORS*
COLORS, however this is not always true:
- •
- a few terminals use HLS colors, which do not follow this rule
- •
- terminals supporting a large number of colors are limited by the number of
color pairs that can be represented in a signed short value.
COLORS¶
After initializing curses, this variable contains the number of colors which the
terminal can support.
COLS¶
After initializing curses, this variable contains the width of the screen, i.e.,
the number of columns.
ESCDELAY¶
This variable holds the number of milliseconds to wait after reading an escape
character, to distinguish between an individual escape character entered on
the keyboard from escape sequences sent by cursor- and function-keys (see
curses(3X).
LINES¶
After initializing curses, this variable contains the height of the screen,
i.e., the number of lines.
TABSIZE¶
This variable holds the number of columns used by the
curses library when
converting a tab character to spaces as it adds the tab to a window (see
curs_addch(3X).
The Current Screen¶
This implementation of curses uses a special window
curscr to record its
updates to the terminal screen.
The New Screen¶
This implementation of curses uses a special window
newscr to hold
updates to the terminal screen before applying them to
curscr.
The Standard Screen¶
Upon initializing curses, a default window called
stdscr, which is the
size of the terminal screen, is created. Many curses functions use this
window.
NOTES¶
The curses library is initialized using either
initscr(3X), or
newterm(3X).
If
curses is configured to use separate curses/terminfo libraries, most
of these variables reside in the curses library.
PORTABILITY¶
ESCDELAY and TABSIZE are extensions, not provided in most other implementations
of curses.
SEE ALSO¶
ncurses(3NCURSES),
opaque(3NCURSES),
terminfo(3NCURSES),
threads(3NCURSES),
terminfo_variables(3NCURSES),
terminfo(5).