[Qt-interest] QNetworkAccessManager in GUI thread

[Thiago Macieira]

Em Quinta-feira 21 Janeiro 2010, às 12:33:14, Nitin Mahajan escreveu:
> Hello,
> 
> In a GUI application like Demo Browser, I have a QNetworkAccessManager
> object say "A" created in the GUI thread itself.
> 
> I want to do the actual file download in a separate thread, so that my
> GUI/mouse cursor does not freeze. Can I create a new QNetworkAccessManager
> "B" in the new thread and set the cookiejar and proxy from "A" and still
> download?

No.

QNetworkAccessManager, all its QNetworkReply objects, QNetworkCookieJar, 
QAbstractNetworkCache, etc., must all live in the same thread.

> While doing the download in the GUI thread itself I can see the mouse
> cursor freezing, even though the replies of the requests sent through
> NetworkAccessManager arrive asynchronously. Whether Network acccess
> manager does some operation which is still Blocking?

Nothing is blocking. Everything is asynchronous.

My guess is that your device is just that much underpowered. It would be 
interesting to profile the application and find out where the bottleneck is.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
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