by Remo Franceschel » Fri, 01 Aug 1997 04:00:00
Hi, could someone tell me how:
- move the cursor at (x, y)
- clear the screen
- inverse the background color with foreground color
I use Linux Slackware 1.2.13, with gcc 2.7.
PLEASE HELP, thanks
REMO FRANCESCHELLI - ITIAV 4a Info.
http://www.geocities.com/SiliconValley/Lakes/7668
(Programmazione in Pascal)
** Concentrazione = Forza **
by Neil Moor » Fri, 01 Aug 1997 04:00:00
--
-Neil Moore http://www.veryComputer.com/~amethyst/
by J. Fa » Mon, 11 Aug 1997 04:00:00
> > Hi, could someone tell me how:
> > - move the cursor at (x, y)
use erase() or clear() in the ncurses.hQuote:> > - clear the screen
> man ncurses (man terminfo or man termcap if you want to be a *
> about it)
> --
> -Neil Moore http://www.veryComputer.com/~amethyst/
by Robert Wues » Mon, 11 Aug 1997 04:00:00
> > > Hi, could someone tell me how:
> > > - move the cursor at (x, y)
> move(x,y) in the ncurses.h should do the trick
> > > - clear the screen
> use erase() or clear() in the ncurses.h
> > > - inverse the background color with foreground color
> > man ncurses (man terminfo or man termcap if you want to be a *
> > about it)
> > --
> > -Neil Moore http://www.veryComputer.com/~amethyst/
by Robert Wues » Tue, 12 Aug 1997 04:00:00
> > > Hi, could someone tell me how:
> > > - move the cursor at (x, y)
> move(x,y) in the ncurses.h should do the trick
> > > - clear the screen
> use erase() or clear() in the ncurses.h
> > > - inverse the background color with foreground color
> > man ncurses (man terminfo or man termcap if you want to be a *
> > about it)
> > --
> > -Neil Moore http://www.veryComputer.com/~amethyst/
by T.E.Dicke » Tue, 12 Aug 1997 04:00:00
: It's actually move(y,x). All of the curses lib is wierd this way.
That's an artifact related to the cursor movement escape sequences on
some (i.e., ANSI) terminals; the y value appears first in the sequence.
So curses was built over/with termcap, and the designers fed a lot of
the latter's details up into the curses level.
(But what _that_ was done - that's been a while...)
--
Thomas E.*ey
http://www.veryComputer.com/
by Chris Wate » Wed, 13 Aug 1997 04:00:00
The fact that "row, column" is backwards from "x, y" is a historical
artifact dating back hundreds of years before the invention of the
computer. Anyway, it has nothing to do with the curses library being
"wierd." The curses library works the way you *should* expect.
What's weird is systems like Borland's conio, where you have to say
"gotoxy(column, row)." Sorry, but "column, row" is *wrong*! :-)
--
Chris Waters |
www.dsp.net/xtifr/ (web) | volcaniconi- standalone haiku.
by Jeff Rea » Sun, 17 Aug 1997 04:00:00
by James Junmin Fa » Sun, 17 Aug 1997 04:00:00
I think it's because of the convention in life. We only say row m,
column n, not column n, row m.
> > It's actually move(y,x). All of the curses lib is wierd this way.
> All the character displays I can think of have been addressed this way.
> Probably it's due to a most-significant, least-significant relationship,
> i.e., to address a character at row y, column x, you would use an offset
> of (y * 80) + x or something like that. Of course, with the attribute
> byte on all IBM PC displays, you would multiply again by 2.
> --
> ----------------------------------------------------------------------
> Anime & Sonic Fan, / Linux rules!
> All Around Nice Guy / Let's keep the Net and the Land FREE!
> ----------------------------------------------------------------------
1. Inverse screen colours on boot screen
I have an old IPX station with a cgthree frame buffer
(GX card i think).
In the NVRAM on this box I can see two boolean parameters
called "inverse?" and "inverse-screen?". The values of
these addresses can be changed to cause the boot up
screen to appear white text on a black background rather
rather than the default black on white.
being able to do this is important to me as I need to
minimise the brightness/luminesence of the screen due
to the environment in which the box is being used.
I was setting these booleans from the Forth prompt by
using :
true to inverse?
true to inverse-screen?
So on the IPX box i was putting these into the NVRAMRC.
However, on an Ultra 1 with an Sbus TurboGX+ frame buffer
I get a data access error message from OpenBoot when
I try to do this.
Can anybody, anywhere help me with this? I need some
help fairly urgently.
-----------------------
Simon Budd
2. SCO UNIX and Quantum Scirocco harddisk
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