curs_touch: touchwin, touchline, untouchwin, wtouchln, is_linetouched,
is_wintouched - curses refresh control routines
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
pretending 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<b>=1) or have not (changed<b>=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.
The header file <curses.h> automatically includes the header files
<stdio.h> and <unctrl.h>.
Note that all routines except wtouchln may be macros.
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