[Interest] QThread

[william.crocker at analog.com]

On 03/24/2014 08:10 AM, Graham Labdon wrote:
> Thanks for that - my ui is now responsive
> What is the correct way to stop my thread running?
> I tried m_thread->exit() but it still continues
>

Have it periodically check a global, (mutex-protected?)
variable and then terminate (by returning from the run()
function) voluntarily.

> Thanks again
>
> -----Original Message-----
> From: interest-bounces+graham.labdon=avalonsciences.com at qt-project.org [mailto:interest-bounces+graham.labdon=avalonsciences.com at qt-project.org] On Behalf Of André Somers
> Sent: 24 March 2014 12:06
> To: interest at qt-project.org
> Subject: Re: [Interest] QThread
>
> Graham Labdon schreef op 24-3-2014 12:38:
>> Hi
>> I am experimenting with QThreads
>> The basic idea is to have a thread performing some task and to have a
>> button on the UI that can stop this operation
>>
>> So I have a class that will perform the operation called
>> GeneratorThread that has a start slot In the main ui class I create an
>> instance of the class -
>>
>> m_generatorThread = new GeneratorThread(this);
>>
>> Then I call moveToThread  and make the connections-
>> m_generatorThread->moveToThread(m_thread)
>> connect(m_thread,&QThread::started,m_generatorThread,&
>> GeneratorThread::start);
>> connect(m_generatorThread,&GeneratorThread::finished,m_thread,&QThread
>> ::quit);
>> connect(m_generatorThread,&GeneratorThread::finished,m_generatorThread
>> ,&GeneratorThread::deleteLater);
>> connect(m_thread,&QThread::finished,m_generatorThread,&GeneratorThread
>> ::deleteLater);
>>
>> And finally I start the thread
>> m_thread->start()
>>
>> The generatorThread simply writes a debug message every second and I see this happening.
>> The problem is that my ui does not respond to any input - so my stop
>> button will not work
>>
>> I am obviously doing something wrong and would appreciate any help
> Yeah, you are doing some things wrong.
> Your moveToThread will fail, because GeneratorThread (confusing name for what seems to be a worker class?) has a parent. That causes that your worker is not in a different thread at all, but blocking your main thread instead.
>
> André
>
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