curs_touch(3X)                 DG/UX R4.11MU05                curs_touch(3X)


NAME
       curs_touch:  touchwin, touchline, untouchwin, wtouchln,
       is_linetouched, is_wintouched - 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 is_linetouched(WINDOW *win, int line);
       int is_wintouched(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 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.

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), curs_refresh(3X).


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