curs_touch, touchwin, touchline, untouchwin, wtouchln, is_linetouched,
is_wintouched - curses refresh control routines
cc [ flag ... ] file ... -lcurses [ library ... ]
int touchwin(WINDOW *win);
int touchline(WINDOW *win, int start, int count);
int untouchwin(WINDOW *win);
int wtouchln(WINDOW *win, int y, int n, int changed);
int is_linetouched(WINDOW *win, int line);
int is_wintouched(WINDOW *win);
The touchwin() and touchline() routines throw away all optimization
information about which parts of the window have been touched, by pre‐
tending that the entire window has been drawn on. This is sometimes
necessary when using overlapping windows, since a change to one window
affects the other window, but the records of which lines have been
changed in the other window do not reflect the change. The routine
touchline() only pretends that count lines have been changed, beginning
with line start.
The untouchwin() routine marks all lines in the window as unchanged
since the last call to wrefresh().
The wtouchln() routine makes n lines in the window, starting at
line y, look as if they have (changed=1) or have not (changed=0) been
changed since the last call to wrefresh().
The is_linetouched() and is_wintouched() routines return TRUE if the
specified line/window was modified since the last call to wrefresh();
otherwise they return FALSE. In addition, is_linetouched() returns ERR
if line is not valid for the given window.
All routines return the integer ERR upon failure and an integer value
other than ERR upon successful completion, unless otherwise noted in
the preceding routine descriptions.
See attributes(5) for descriptions of the following attributes:
│ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
│MT-Level │ Unsafe │
SEE ALSOcurs_refresh(3CURSES), curses(3CURSES), attributes(5)NOTES
The header <curses.h> automatically includes the headers <stdio.h> and
Note that all routines except wtouchln() may be macros.
Dec 31, 1996 CURS_TOUCH(3CURSES)