[Qt-interest] How to implement a `Stop Button' ?

[Daniel Price]

Nice example - one thing to be aware of though is that your hasher object is constructed in another thread (presumably the main thread) from the thread that does the work in run(). This could cause issues.

A better solution would be to construct the QCryptographicHash within run(). That way everything is in the same thread.

> -----Original Message-----
> From: qt-interest-bounces at trolltech.com [mailto:qt-interest-
> bounces at trolltech.com] On Behalf Of Richard Moore
> Sent: 12 May 2010 09:42
> To: qt-interest at trolltech.com
> Subject: Re: [Qt-interest] How to implement a `Stop Button' ?
>
> On Wed, May 12, 2010 at 3:00 AM, Michael Jackson
> <mike.jackson at bluequartz.net> wrote:
> > You will need to push your searching for the strings task onto its
> own
> > thread. There are several ways to do this. The Qt Documentation goes
> into
> > detail on how to do this. Some ideas would be the following:
> >
> > Hook up some signals/slots between the gui button and the task so
> that when
> > the user clicks the "Stop" button a signal is sent to the thread that
> marks
> > it for cancelation.
> >
> > When the task is completed, signal the mail thread to set the GUI
> back to a
> > proper state.
>
> I wrote a simple example that shows how you can do this sort of thing
> at http://www.kdedevelopers.org/node/4138
>
> Rich.
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