[Qt-interest] QThread::sleep static protected

[Scott Aron Bloom]

Rather than blocking, you can keep it in the UI thread, and use the
signals, which of course have no timeout :(

You can however, create a 5 second single shot timer, which you kick off
after you make the request, and tie the time out signal to abort slot of
the TCP object

Scott

> -----Original Message-----
> From: qt-interest-bounces at trolltech.com [mailto:qt-interest-
> bounces at trolltech.com] On Behalf Of Patric
> Sent: Sunday, May 31, 2009 6:17 AM
> To: Karol Krizka
> Cc: qt-interest at trolltech.com
> Subject: Re: [Qt-interest] QThread::sleep static protected
> 
> :) Thank you Karol. Actually, I'm going to use different thread for
this
> request, so I don't think the UI will be affected.
> I hope the method I mentioned will do the job.
> 
> Regards,
> Patric
> 
> ----- Original Message -----
> From: "Karol Krizka" <kkrizka at gmail.com>
> To: "Patric" <userqt at gmail.com>
> Sent: Sunday, May 31, 2009 4:06 PM
> Subject: Re: [Qt-interest] QThread::sleep static protected
> 
> 
> > On Sun, May 31, 2009 at 2:59 PM, Patric <userqt at gmail.com> wrote:
> >> Well, I'm sending some UDP packages on the wire. And I need if
there is
> >> no
> >> response 5 seconds, the function to exit with error code. That's
why I
> >> need
> >> a timeout. The application is UI interface.
> >>
> > So yes, to me it seems that you do not want to use a standard sleep
> > function. While you'll be waiting for the response, the UI will
remain
> > frozen from all updates for 5 seconds. Even simple ones like
> > repainting the window. I don't have much experience with network
code,
> > so I can't help you with the best common approach is.
> >
> > --
> > Cheers,
> > Karol Krizka
> > http://www.krizka.net
> >
> >> Regards,
> >> Patric
> >> ----- Original Message ----- From: "Karol Krizka"
<kkrizka at gmail.com>
> >> To: "Patric" <userqt at gmail.com>
> >> Cc: <qt-interest at trolltech.com>
> >> Sent: Sunday, May 31, 2009 3:48 PM
> >> Subject: Re: [Qt-interest] QThread::sleep static protected
> >>
> >>
> >>> Hi there,
> >>>
> >>> 2009/5/31 Patric <userqt at gmail.com>:
> >>>>
> >>>> Hello,
> >>>> I'm trying to sleep my thread for 5 seconds and I tried to use
> >>>> QThread::sleep. But it's protected and it seems I can't use it.
> >>>> QThread::sleep(5); for example.
> >>>>
> >>> A google search turns up this thread:
> >>> http://lists.trolltech.com/qt-interest/2007-01/thread00133-0.html
> >>>
> >>> It seems that you will have to implement your own sleep function.
> >>> However, there is also an earlier thread:
> >>> http://lists.trolltech.com/qt-interest/2005-08/thread00071-0.html
> >>> According to it, it is not a good idea to pause an interactive
> >>> application like those build with Qt, and I tend to agree with
that.
> >>> However, that argument does not work with console applications,
which
> >>> Qt supports. If that is the case, did you think about using the
> >>> standard C sleep() function?
> >>>
> >>>> What's the best way to pause my program for 5 seconds, I'm trying
to
> >>>> implement a timeout.
> >>>>
> >>> What do you mean you're trying to implement a timeout? Are you
trying
> >>> to do some task (ei: connect somewhere), and if it does not
succeed in
> >>> a certain time, then kill it and inform the user? If so, I don't
think
> >>> pausing the program for 5 seconds is a good idea. What if the task
> >>> completes before 5 seconds are up? Plus this will keep your
> >>> application in an unresponsive state (including no redraws).
> >>>
> >>> --
> >>> Cheers,
> >>> Karol Krizka
> >>> http://www.krizka.net
> >>>
> >>>
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