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


See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+
|MT-Level | Unsafe |
+--------------------+-----------------+

SEE ALSO


clearok(3XCURSES), curses(3XCURSES), libcurses(3XCURSES),
prefresh(3XCURSES), redrawwin(3XCURSES), attributes(7), standards(7)

illumos June 5, 2002 DOUPDATE(3XCURSES)