Re: problems with screen redraws?

[Thomas Dickey]

On Thu, 21 Oct 2004, Fairlight wrote:

> I'm having an odd problem with ncurses 5.4.
>
> I'm creating a line with sprintf() that is always the same length.
>
> I use mvwaddstr to place the line over the top of a previous line.  The
> problem is that I'm doing something similar to `top`--a monitor program.
> Well, the lines occasionally get shifted over one space at the start
> position. I specify 0 and it starts at 1.  I specify 1, it starts at 2.
> But only sporadically, and not all rows do it.  Different rows also do
> this.

If the string is as wide as the screen and if the terminal description
regarding wrapping isn't correct, that could be a problem (guessing).
The usual suspect in this case is the terminal emulator, but I use
both screen and PuTTY frequently (but admittedly with a small range of
applications), haven't _noticed_ a problem.

PuTTY's terminfo doesn't exactly match in the area of wrapping however
(in the terminfo I use, bw is set while vt100 and xterm don't):

comparing putty to vt100.
    comparing booleans.
        bw: T:F.
        ccc: T:F.
        hs: T:F.
    comparing numbers.
        colors: 8:-1.
        cols: -1:80.
        lines: -1:24.
        ncv: 22:-1.
        pairs: 64:-1.
        vt: -1:3.
    comparing string...

There's an up-to-date entry for "putty" in
        ftp://invisible-island.net/ncurses/terminfo.src.gz

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net