curs_touch(3X)                                               curs_touch(3X)


   NAME
         curstouch:  touchwin, touchline, untouchwin, wtouchln,
         islinetouched, iswintouched - curses refresh control routines

   SYNOPSIS
         #include <curses.h>
         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 islinetouched(WINDOW *win, int line);
         int iswintouched(WINDOW *win);

   DESCRIPTION
         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=1) or have not (changed=0) been changed
         since the last call to wrefresh.

         The islinetouched and iswintouched routines return TRUE if the
         specified line/window was modified since the last call to wrefresh;
         otherwise they return FALSE.  In addition, islinetouched returns ERR
         if line is not valid for the given window.

   RETURN VALUE
         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.

   NOTES
         The header file <curses.h> automatically includes the header files
         <stdio.h> and <unctrl.h>.

         Note that all routines except wtouchln may be macros.

   SEE ALSO
         curses(3X), cursrefresh(3X).





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