[Qt-interest] emit signal from spawned thread

[Cole, Derek]

Isnt that saying that I basically have to pass a reference of the QFuture to the method that I would be calling with QtConcurrent run to be able to call the progress functions, which could then be monitored by the QFutureWatcher in the master thread?


________________________________________
From: qt-interest-bounces+dcole=integrity-apps.com at qt.nokia.com [qt-interest-bounces+dcole=integrity-apps.com at qt.nokia.com] on behalf of Guido Seifert [wargand at gmx.de]
Sent: Thursday, August 18, 2011 5:31 PM
To: TrolltechInterest
Subject: Re: [Qt-interest] emit signal from spawned thread

> How can I make this work?

By reading the documentation of QtConcurrentRun?

The object, which 'spawns' your thread (actually takes a thread from
the thread pool) is _not_ the thread object. So connecting signals
does not make much sense. Regardless where you put your connects.

>From the docs:
> To run a function in another thread, use QtConcurrent::run():

>  extern void aFunction();
>  QFuture<void> future = QtConcurrent::run(aFunction);

> This will run aFunction in a separate thread obtained from the default
> QThreadPool. You can use the QFuture and QFutureWatcher classes to
> monitor the status of the function.

I did not look much deeper and might have missed a trick, but I doubt
you can use QtConcurrentRun the way you want to.


Guido
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