Tribblix: manual page: doupdate.3xcurses

DOUPDATE(3XCURSES) X/Open Curses Library Functions DOUPDATE(3XCURSES)

NAME

doupdate, refresh, wnoutrefresh, wrefresh - refresh windows and lines

SYNOPSIS

cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib \
-R /usr/xpg4/lib -lcurses [ library... ]

c89 [ flag... ] file... -lcurses [ library... ]

#include <curses.h>

int doupdate(void);

int refresh(void);

int wnoutrefresh(WINDOW *win);

int wrefresh(WINDOW *win);

DESCRIPTION

The refresh() and wrefresh() functions copy stdscr and win,
respectively, to the terminal screen. These functions call the
wnoutrefresh() function to copy the specified window to curscr and
the doupdate() function to do the actual update. The physical
cursor is mapped to the same position as the logical cursor of the
last window to update curscr unless leaveok(3XCURSES) is enabled (in
which case, the cursor is placed in a position that X/Open Curses
finds convenient).

When outputting several windows at once, it is often more efficient
to call the wnoutrefresh() and doupdate() functions directly. A call
to wnoutrefresh() for each window, followed by only one call to
doupdate() to update the screen, results in one burst of output,
fewer characters sent, and less CPU time used.

If the win parameter to wrefresh() is the global variable curscr, the
screen is immediately cleared and repainted from scratch.

For details on how the wnoutrefresh() function handles overlapping
windows with broad glyphs, see the Overlapping Windows section of the
curses(3XCURSES) reference manual page.

PARAMETERS

win
Is a pointer to the window in which to refresh.

RETURN VALUES

On success, these functions return OK. Otherwise, they return ERR.

ERRORS

None.

ATTRIBUTES