curstouch(3X) curstouch(3X)

NAME
       ttoouucchhwwiinn, ttoouucchhlliinnee, uunnttoouucchhwwiinn, wwttoouucchhllnn, iisslliinneettoouucchheedd,
       iisswwiinnttoouucchheedd - ccuurrsseess refresh control routines

SYNOPSIS
       ##iinncclluuddee <>
       iinntt ttoouucchhwwiinn((WWIINNDDOOWW **wwiinn));;
       iinntt ttoouucchhlliinnee((WWIINNDDOOWW **wwiinn,, iinntt ssttaarrtt,, iinntt ccoouunntt));;
       iinntt uunnttoouucchhwwiinn((WWIINNDDOOWW **wwiinn));;
       iinntt wwttoouucchhllnn((WWIINNDDOOWW **wwiinn,, iinntt yy,, iinntt nn,, iinntt cchhaannggeedd));;
       bbooooll iisslliinneettoouucchheedd((WWIINNDDOOWW **wwiinn,, iinntt lliinnee));;
       bbooooll iisswwiinnttoouucchheedd((WWIINNDDOOWW **wwiinn));;

DESCRIPTION
       The ttoouucchhwwiinn and ttoouucchhlliinnee routines throw away all optimization  infor-
       mation 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 ttoouucchhlliinnee only
       pretends that count lines have been changed, beginning with line start.

       The uunnttoouucchhwwiinn routine marks all lines in the window as unchanged since
       the last call to wwrreeffrreesshh.

       The wwttoouucchhllnn routine makes n lines in the window, starting at  line  y,
       look  as  if they have (changed==11) or have not (changed==00) been changed
       since the last call to wwrreeffrreesshh.

       The iisslliinneettoouucchheedd and iisswwiinnttoouucchheedd routines return TTRRUUEE if the speci-
       fied  line/window  was modified since the last call to wwrreeffrreesshh; other-
       wise they return FFAALLSSEE.  In addition,  iisslliinneettoouucchheedd  returns  EERRRR  if
       line is not valid for the given window.

RREETTUURRNN VVAALLUUEE
       All  routines  return the integer EERRRR upon failure and an integer value
       other than EERRRR upon successful completion, unless  otherwise  noted  in
       the preceding routine descriptions.

       X/Open does not define any error conditions.  In this implementation

              iisslliinneettoouucchheedd
                   returns  an  error if the window pointer is null, or if the
                   line number is outside the window.  Note that ERR  is  dis-
                   tinct from TRUE and FALSE, which are the normal return val-
                   ues of this function.

              wwttoouucchhllnn
                   returns an error if the window pointer is null, or  if  the
                   line number is outside the window.

PPOORRTTAABBIILLIITTYY
       The XSI Curses standard, Issue 4 describes these functions.

       Some  historic  curses implementations had, as an undocumented feature,
       the ability to do the equivalent of cclleeaarrookk((......,, 11))  by  saying  ttoouucchh-
       wwiinn((ssttddssccrr)) or cclleeaarr((ssttddssccrr)).  This will not work under ncurses.

NNOOTTEESS
       Note that all routines except wwttoouucchhllnn may be macros.

SEE ALSO
       ccuurrsseess(3X), ccuurrssrreeffrreesshh(3X).



                                                                curstouch(3X)