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curs_touch, is_linetouched, is_wintouched, touchline, touchwin, untouchwin, wtouchln - Curses routines that control refresh
#include <curses.h>
bool is_linetouched(
WINDOW *win,
int line
);
bool is_wintouched(
WINDOW *win
);
int touchline(
WINDOW *win,
int start,
int count
);
int touchwin(
WINDOW *win
);
int untouchwin(
WINDOW *win
);
int wtouchln(
WINDOW *win,
int y,
int n,
int changed
);
Interfaces documented on this reference page conform to industry standards as follows:
touchwin: XPG4, XPG4-UNIX
is_linetouched, is_wintouched, touchline, untouchwin, wtouchln: XPG4-UNIX
Refer to the
standards(5)
reference page for more information
about industry standards and associated tags.
The touchwin and touchline routines throw away all optimization information about which parts of the window have been touched, by pretending that the entire window has been drawn on. It is sometimes necessary to call these routines when using overlapping windows. In this case, a change to one window affects the other window, but the other window's records of which lines have been changed do not reflect the change in the first window. The touchline routine 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 (if changed=1) or have not changed (changed=0) since the last call to wrefresh.
The
is_linetouched
or
is_wintouched
routines return
TRUE
if the specified line or 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.
The header file <curses.h> automatically includes the header file <stdio.h>.
Note that
touchline
may be a macro.
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.
Functions: curses(3), curs_refresh(3)
Others: standards(5)