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Path: utzoo!watmath!clyde!akgua!mcnc!decvax!dartvax!lorien
From: lorien@dartvax.UUCP (Lorien Y. Pratt)
Newsgroups: net.bugs.4bsd
Subject: Re: Bug in curses package
Message-ID: <1661@dartvax.UUCP>
Date: Wed, 23-May-84 15:45:18 EDT
Article-I.D.: dartvax.1661
Posted: Wed May 23 15:45:18 1984
Date-Received: Wed, 30-May-84 09:22:31 EDT
References: <82@chalmers.UUCP> <808@sdcsvax.UUCP>
Organization: Dartmouth College
Lines: 51

When I saw Mike Laman's bug fix for lack of scrolling in Curses,
I thought it was just the thing to help us avoid an anticipated need to
hack our C program to get around curses so that scrolling worked at a
decent rate.  Problem is, the bug fixes he proposes *don't work* at our
(4.2bsd) installation.  As it's not documented in the curses manual,
perhaps I simply don't know how to get the screen to scroll.

All I want to do is to display pages of data to users without clearing
the screen between pages but rather to begin scrolling in a new page
when they press some character indicating they want to go on.

Here's the program I wrote to test if introducing Laymen's bug
fix worked (only #1 on his list was not already fixed).  *Tell me* how
to modify Curses so that it uses the built-in scrolling facilities of
my terminal instead of redrawing it all.

/* Start of curtest.c */
#include<curses.h>
#include <stdio.h>

main()
{
char temp[256];
char t;
int i;

initscr();
scrollok( stdscr, TRUE );

for(i=0;i<24;i++)
{
  sprintf( temp, "This        is        the        line   numbered   %d", i );
  mvaddstr( i, 0, temp );
  refresh();
}
t = getch();
for(i=24;i<50;i++)
{
  scroll( stdscr );
  sprintf( temp, "Line %d", i );
  mvaddstr( 23, 0, temp );
  refresh();
}
endwin();
}
/* End of curtest.c */

Compile by:
  cc curtest.c -lcurses -ltermlib
Run by:
  a.out