[Qt-interest] Break an infinite loop in the qt event loop.

[Gopalakrishna Bhat]

On Tue, Aug 24, 2010 at 1:32 PM, <Oliver.Knoll at comit.ch> wrote:

> On 2010-08-24 Thiago Thiago Macieira wrote:
>
> > ...
> >       while (condition) {
> >               /* Do something */
> >               processEvents();
> >       }
> >
> > And make sure that condition changes from true to false when the loop
> > must be broken.
> >
> > Note that the "Do something" part should be fast so that the GUI doesn't
> block.
>

Thanks, I tried this approach and it worked fine.


And if that "Do something" takes longer, then put the whole thing into a
> QThread, and if the user hits "Cancel" then signal the thread to terminate
> by setting the 'condition' to false - then synchronise with the thread (wait
> until it has finished), see QThread documentation how to "nicely" terminate
> a thread (if the work is not "critical" (no data corruption can happen or it
> is not so bad if data corruption happens) then in theory you could also
> instantly kill() a thread - but that is very rude and usually not a good
> practice).
>
> I cannot transfer the control from the main thread since it has to do
something on the a different widget.

>
>
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With regards
Gopalakrishna Bhat

-- 
My blog http://gkbhat.blogspot.com
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