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30 .\" $Id: curs_scroll.3x,v 1.45 2024/05/25 20:16:27 tom Exp $
31 .TH curs_scroll 3X 2024-05-25 "ncurses @NCURSES_MAJOR@.@NCURSES_MINOR@" "Library calls"
51 scroll a \fIcurses\fP window
54 \fB#include <curses.h>
56 \fBint scroll(WINDOW * \fIwin\fP);
58 \fBint scrl(int \fIn\fP);
59 \fBint wscrl(WINDOW * \fIwin\fP, int \fIn\fP);
63 scrolls the given window up one line.
65 every visible line we might number
69 The text of the top line in the window disappears and the bottom line
70 is populated with blank characters;
71 see \fB\%bkgd\fP(3X) or \fB\%bkgrnd\fP(3X).
73 if the scrolling region of the window is the entire screen,
74 the physical screen may be scrolled at the same time;
75 see \fB\%curscr\fP(3X).
82 or the specified window up or down depending on the sign of
101 The cursor does not move.
102 These functions perform no operation unless scrolling is enabled for the
103 window via \fB\%scrollok\fP(3X).
105 These functions return
114 if scrolling is not enabled in the window,
115 for example with \fB\%scrollok\fP(3X),
123 may be implemented as macros.
130 behaves as one would expect
138 Issue 4 describes these functions.
139 It defines no error conditions.
142 \*(``an integer value other than
144 as a successful return value.
146 SVr4 indicates that the optimization of physically scrolling immediately
147 if the scroll region is the entire screen \*(``is\*('' performed,
148 not \*(``may be\*('' performed.
150 deliberately does not guarantee that this will occur,
151 to leave open the possibility of smarter optimization of multiple scroll
152 actions on the next update.
156 nor X/Open Curses specify whether the current attribute or current color
157 pair of blanks generated by the scroll function are zeroed.
162 \fB\%curs_outopts\fP(3X)