[maemo-developers] Strange problem with Maemo5ShowProgressIndicator

[From: Daniil Ivanov]

Hi Robin!

   The question was how to make indicator to appear, not how to avoid
blocking of UI
   during long synchronous operation. Sleeping was used just as
simulation of long blocking
   operation.

Thanks, Daniil.

On Tue, Jun 8, 2010 at 3:26 PM, Robin Burchell <viroteck at viroteck.net> wrote:
> On Tue, Jun 8, 2010 at 1:18 PM, Felipe Crochik <felipe at crochik.com> wrote:
>> Daniil: Thank you (again) for the clarification.
>> Sascha Mäkelä: this is a simpler way than the QTimer::singleshot. :)
>
> I should add that both sleeping and using a QTimer aren't really ideal
> solutions, as the UI will be unresponsive while processing is going
> on.
>
> Generally speaking, you should *try* to not perform
> blocking/synchronous operations unless you do them on a separate
> thread (see QRunnable, QThread, QtConcurrent). The other alternative
> is to use asynchronous equivilents to achieve what you're trying to
> do, for example, using QNetworkAccessManager to download content is
> asynchronous, and won't block the UI as a result. It's a little more
> difficult to write, but the benefits are quite nice. :-)
>
>> Felipe
>
>
> Robin Burchell
> mob: +447702671419
> msn: msn at viroteck.net
> irc: w00t @ irc.freenode.net
> twr: http://twitter.com/w00teh
> lac: http://identi.ca/w00t
>