curs_variables(3X) manual page
Table of Contents
COLORS, COLOR_PAIRS, COLS, ESCDELAY,
LINES, TABSIZE, curscr, newscr, stdscr - curses global variables
#include <curses.h>
int COLOR_PAIRS;
int COLORS;
int COLS;
int ESCDELAY;
int LINES;
int TABSIZE;
WINDOW * curscr;
WINDOW * newscr;
WINDOW * stdscr;
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 curs_threads(3X)
)
which provide read-only access to curses’s state. In either case, applications
should treat them as read-only to avoid confusing the library.
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.
After initializing curses, this variable
contains the number of colors which the terminal can support.
After
initializing curses, this variable contains the width of the screen, i.e.,
the number of columns.
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)
.
After initializing curses,
this variable contains the height of the screen, i.e., the number of lines.
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)
.
This implementation of curses uses
a special window curscr to record its updates to the terminal screen.
This implementation of curses uses a special window newscr to
hold updates to the terminal screen before applying them to curscr.
Upon initializing curses, a default window called stdscr,
which is the size of the terminal screen, is created. Many curses functions
use this window.
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.
ESCDELAY
and TABSIZE are extensions, not provided in most other implementations
of curses.
curses(3X)
, curs_threads(3X)
, term_variables(3X)
, terminfo(3X)
,
terminfo().
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