curs_touch(3X)                   UNIX System V                   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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