Re: resize

[Thomas Dickey]

On Mon, 21 Jun 2004, Folkert van Heusden wrote:

> Hi,
>
> I was wondering: what is *the* procedure for handling screenrefreshes?

It depends on what you are trying to do.  ncurses has a sigwinch handler,
which will make wgetch return KEY_RESIZE when a SIGWINCH is detected (and
will call resizeterm in wgetch automatically).

> I saw endwin() + refresh() but also someone doing endwin() and initscr().

endwin/refresh will work, but causes more repainting than I'd like
(the reason for making ncurses's sigwinch handler work properly).

endwin/initscr will dump core on some implementations; X/Open notes
that a portable application should not call initscr more than once.
(It happens to work with ncurses)

> Furthermore: when should I do the resizeterm and such?
> I'm asking this since in some situation resizing seems to fail.
>
> What I'm doing now is:
> SIGWINCH-handler:
>       ioctl(1, TIOCGWINSZ, &size);
>         max_y = size.ws_row;
>         max_x = size.ws_col;
>
> and after that (NOT in the signalhandler itself: I use some global variable
> to alert the main loop):
>
>       resizeterm(max_y, max_x);
>       touchwin(stdscr);

the touchwin would be redundant.

>       endwin();
>       refresh();

...but that should work

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