Re: Leaving display visible when exiting ncurses application

[Thomas Dickey]

On Tue, 12 Jan 2010, Allistar wrote:

> Hi all,
>  I have developed a brute-force puzzle breaking application for a board
> puzzle (called Kaleidoscope). This can take many hundreds of thousands of
> iterations, and the output of the current "solution" is displayed using
> ncurses (the board is output at a particular location on the screen, so the
> user sees it animating as the algorithm progresses).
>
>  The problem is that when the application finishes, the screen is cleared
> and I am left back at the terminal prompt. I would like it so the contents
> from the ncurses window are displayed to the normal console when the
> application exits. Is there a way to do this?

That sounds like you want to override the switching between xterm's
normal/alternate screens.

dialog does this - relies on knowing how ncurses works, i.e., that the 
data declared in term.h _is_ the same as used by the curses library, so 
it's not portable to other implementations.  Look at init_dialog() in 
util.c

        http://invisible-island.net/dialog/

> Also I would like this to happen if the application is killed ungracefully
> (ctrl-c).

Given the above workaround, this would work reasonably well also...

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