Re: Spinning the main loop

[Kevin Ryde <user42 zip com au>]

Sergei Steshenko <sergstesh yahoo com> writes:
> Actually, not only I spin the main loop, I also hide the sensitive GUI
> elements which may cause new events, i.e. there is, for example, no
> physical possibility to change state of normally existing slider (called
> "Adjustment") because the sliders are temporarily hidden.

(Gratuituous self promotion alert :-)
For interest, in my math-image program I restart a calculation on a
change to the gui controls.  But my calculation is only perhaps 10
seconds not a couple of minutes and is easy enough to chunk up under an
idle handler in the usual way.  For a bigger calculation I probably
prefer a child process over a thread, as I've yet to see a threading
system that doesn't put you in all sorts of danger from crashes and
stuff and doesn't in fact hang in certain system calls anyway!