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, respec‐
tively, 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 doup‐
date() 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
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Standard │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │Unsafe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOclearok(3XCURSES), curses(3XCURSES), libcurses(3XCURSES), pre‐
fresh(3XCURSES), redrawwin(3XCURSES), attributes(5), standards(5)SunOS 5.10 5 Jun 2002 doupdate(3XCURSES)
