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30 * @Id: curs_scroll.3x,v 1.9 2001/10/14 00:51:56 tom Exp @
34 <TITLE>curs_scroll 3x</TITLE>
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39 <H1>curs_scroll 3x</H1>
42 <!-- Manpage converted by man2html 3.0.1 -->
46 <STRONG>scroll</STRONG>, <STRONG>scrl</STRONG>, <STRONG>wscrl</STRONG> - scroll a <STRONG>curses</STRONG> window
50 <H2>SYNOPSIS</H2><PRE>
51 <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
53 <STRONG>int</STRONG> <STRONG>scroll(WINDOW</STRONG> <STRONG>*win);</STRONG>
54 <STRONG>int</STRONG> <STRONG>scrl(int</STRONG> <STRONG>n);</STRONG>
55 <STRONG>int</STRONG> <STRONG>wscrl(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>n);</STRONG>
59 <H2>DESCRIPTION</H2><PRE>
60 The <STRONG>scroll</STRONG> routine scrolls the window up one line. This
61 involves moving the lines in the window data structure.
62 As an optimization, if the scrolling region of the window
63 is the entire screen, the physical screen may be scrolled
66 For positive <EM>n</EM>, the <STRONG>scrl</STRONG> and <STRONG>wscrl</STRONG> routines scroll the
67 window up <EM>n</EM> lines (line <EM>i</EM>+<EM>n</EM> becomes <EM>i</EM>); otherwise scroll
68 the window down <EM>n</EM> lines. This involves moving the lines
69 in the window character image structure. The current cur-
70 sor position is not changed.
72 For these functions to work, scrolling must be enabled via
73 <STRONG>scrollok</STRONG>.
77 <H2>RETURN VALUE</H2><PRE>
78 These routines return <STRONG>ERR</STRONG> upon failure, and <STRONG>OK</STRONG> (SVr4 only
79 specifies "an integer value other than <STRONG>ERR</STRONG>") upon success-
85 Note that <STRONG>scrl</STRONG> and <STRONG>scroll</STRONG> may be macros.
87 The SVr4 documentation says that the optimization of phys-
88 ically scrolling immediately if the scroll region is the
89 entire screen "is" performed, not "may be" performed.
90 This implementation deliberately does not guarantee that
91 this will occur, to leave open the possibility of smarter
92 optimization of multiple scroll actions on the next
95 Neither the SVr4 nor the XSI documentation specify whether
96 the current attribute or current color-pair of blanks gen-
97 erated by the scroll function is zeroed. Under this
102 <H2>PORTABILITY</H2><PRE>
103 The XSI Curses standard, Issue 4 describes these func-
108 <H2>SEE ALSO</H2><PRE>
109 <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>
114 Man(1) output converted with
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