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NetBSD 6.1.5 - man page for is_linetouched (netbsd section 3)

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CURSES_TOUCH(3) 		   BSD Library Functions Manual 		  CURSES_TOUCH(3)

NAME
     curses_touch, touchline, touchoverlap, touchwin, untouchwin, wtouchln, is_linetouched,
     is_wintouched, redrawwin, wredrawln, wsyncup, wsyncdown -- curses window modification rou-
     tines

LIBRARY
     Curses Library (libcurses, -lcurses)

SYNOPSIS
     #include <curses.h>

     int
     touchline(WINDOW *win, int start, int count);

     int
     touchoverlap(WINDOW *win1, WINDOW *win2);

     int
     touchwin(WINDOW *win);

     int
     untouchwin(WINDOW *win);

     int
     wtouchln(WINDOW *win, int line, int n, boolf changed);

     bool
     is_linetouched(WINDOW *win, int line);

     bool
     is_wintouched(WINDOW *win);

     int
     redrawwin(WINDOW *win);

     int
     wredrawln(WINDOW *win, int line, int n);

     void
     wsyncup(WINDOW *win);

     void
     wsyncdown(WINDOW *win);

DESCRIPTION
     These functions mark lines and windows as modified and check the modification status of
     lines and windows.

     The touchline() function marks count lines starting from start in window win as having been
     modified.	These characters will be synced to the terminal on the next call to wrefresh().

     The touchoverlap() function marks the portion of win2 that overlaps win1 as being modified.

     The touchwin() function marks the entire window win as having been modified.  Conversely,
     the untouchwin() function marks the window win as being unmodified, so that any changes made
     to that window will not be synced to the terminal during a wrefresh().

     The wtouchln() function performs one of two operations on n lines starting at line in the
     given window.  If changed is 1 then the given line range is marked as being modified, if
     changed is 0 then the given line range is set to being unmodified.

     The is_linetouched() function returns TRUE if line in window win has been modified since the
     last refresh was done, otherwise FALSE is returned.

     is_wintouched() returns TRUE if the window win has been modified since the last refresh,
     otherwise FALSE is returned.

     The redrawwin() function marks the entire window win as having been corrupted.  Is is equiv-
     alent to the touchwin() function.

     The wredrawln() function marks n lines starting at line in the given window as corrupted.
     It is equivalent to wtouchln(win, line, n, 1).

     The wsyncup() function touches all ancestors of win.

     The wsyncdown() function touches win if any of its ancestors is touched.

RETURN VALUES
     Functions returning pointers will return NULL if an error is detected.  The functions that
     return an int will return one of the following values:

     OK   The function completed successfully.
     ERR  An error occurred in the function.

SEE ALSO
     curses_refresh(3)

STANDARDS
     The NetBSD Curses library complies with the X/Open Curses specification, part of the Single
     Unix Specification.

HISTORY
     The Curses package appeared in 4.0BSD.

BSD					February 23, 2010				      BSD
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