curs_scroll man page on DigitalUNIX

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curs_scroll(3X)						       curs_scroll(3X)

       scroll, scrl, wscrl - scroll a curses window

       #include <ncurses.h>

       int scroll(WINDOW *win);
       int scrl(int n);
       int wscrl(WINDOW *win, int n);

       The  scroll routine scrolls the window up one line.  This involves mov‐
       ing the lines in the window data structure.  As an optimization, if the
       scrolling  region  of  the  window  is  the entire screen, the physical
       screen may be scrolled at the same time.

       For positive n, the scrl and wscrl routines  scroll  the	 window	 up  n
       lines  (line  i+n becomes i); otherwise scroll the window down n lines.
       This involves moving the lines in the window character image structure.
       The current cursor position is not changed.

       For these functions to work, scrolling must be enabled via scrollok.

       These routines return ERR upon failure, and OK (SVr4 only specifies "an
       integer value other than ERR") upon successful completion.

       Note that scrl and scroll may be macros.

       The  SVr4  documentation	 says  that  the  optimization	of  physically
       scrolling  immediately  if  the scroll region is the entire screen "is"
       performed, not "may be" performed.   This  implementation  deliberately
       does  not  guarantee  that  this will occur, in order to leave open the
       possibility of smarter optimization of multiple scroll actions  on  the
       next update.

       Neither	the SVr4 nor the XSI documentation specify whether the current
       attribute or current color-pair of blanks generated by the scroll func‐
       tion is zeroed.	Under this implementation it is.

       The XSI Curses standard, Issue 4 describes these functions.

       curses(3X), curs_outopts(3X)


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