02-04-2020
Quote:
Originally Posted by
Ralph
It still duplicates the question lines when the cursor is in the middle of the screen.
Not with my linux
lxterminal. But I admit it might benefit from some more tweaking.
Quote:
What do the lines printf "\e7\e[$LINES;120r\e8" and printf "\e7\e[1;${LINES}r\e8" accomplish? I suppose you set the value of LINES to the number of lines of the window - let's say 20. Then the first snippet would say "\e7\e[20;120r\e8" and the second printf "\e7\e[1;20\e8" and r means 'set top and bottom lines of window.'
man bash:
Quote:
Shell Variables
.
.
.
LINES Used by the select compound command to determine the column length for printing selection lists. Automatically set if the checkwinsize op”
tion is enabled or in an interactive shell upon receipt of a SIGWINCH.
The 120 is just an arbitrary value way beyond the lower screen boundary. The construct sets the scroll region from last line seen to somewhere way down...
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CURSES_SCROLL(3) BSD Library Functions Manual CURSES_SCROLL(3)
NAME
curses_scroll, scrl, wscrl scroll, scrollok, setscrreg, wsetscrreg -- curses window scrolling routines
LIBRARY
Curses Library (libcurses, -lcurses)
SYNOPSIS
#include <curses.h>
int
scrl(int n);
int
wscrl(WINDOW *win, int n);
int
scroll(WINDOW *win);
int
scrollok(WINDOW *win, boolf flag);
int
setscrreg(int top, int bottom);
int
wsetscrreg(WINDOW *win, int top, int bottom);
DESCRIPTION
These functions scroll areas on stdscr or on the specified window.
The scrl() function scrolls stdscr by n lines. If n is positive then then stdscr is scrolled up. n lines are lost from the top of stdscr
and n blank lines are inserted at the bottom. If n is negative then stdscr is scrolled down. n blank lines are inserted at the top of
stdscr and n lines are lost from the bottom.
The wscrl() function is the same as the scrl() function, excepting that it scrolls the window specified by win.
The scroll() function scrolls the window win up by one line.
The scrolling behaviour of a window can be controlled by using the scrollok() function. If the flag argument is TRUE then a line wrap at the
bottom of the window will cause the window to be scrolled up one line, if flag is FALSE then lines that would force a scroll will be trun-
cated.
The setscrreg() function sets up a software scrolling region on stdscr which will define a region of the screen that will be scrolled. The
scrolling of this region is also controlled by the scrollok() function.
The wsetscrreg() function does the same as the setscrreg() function, except that the scrolling region is set on the window specified by win.
If a scrolling region has been set with the setscrreg() or wsetscrreg() functions and the current cursor position is inside the scrolling
region, then only the area inside the scrolling region is scrolled.
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_deleteln(3), curses_insdelln(3), curses_insertln(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
August 12, 2002 BSD