On 10/04/2014 12:37 PM, Dominik Haumann wrote:
On Friday 03 October 2014 00:09:11 Aleix Pol wrote:
On Thu, Oct 2, 2014 at 10:10 PM, Hugo Pereira Da Costa <hugo.pere...@free.fr
wrote:
hi all,
I guess its a question to Qt experts or possibly low level KF5 experts.
When comparing debugging outputs when running app + style against Qt4 and
Qt5, I've noticed the following significant difference.
In Qt4, as far as I can tell, QStyle was only instanciated one per QApp,
and deleted at the end.
In Qt5 this seems not to be true anymore and I've seen up to 6 QStyle
running concurently for a single Kate Window, increasing to 13 when
opening
'open file' dialog, decreasing back to 6 when closing it, etc.
Is this a known feature ? Will this stay ?
(I'm running a rather old checkout of Qt-5.4)
If yes, there need to be some design change in Oxygen (as well as in
breeze), to use singletons rather than QStyle's QObject's children for
many
things, with regard for instance caching, configuration, and even possibly
even filters, otherwise I foresee quite some overhead ...
Information welcome,
Best regards,
Hugo
Hi Hugo,
Thanks for looking into this! :)
I would recommend to start by adding a breakpoint on the style's
constructor to see who is calling it. To me it sounds like a bug in Qt, but
it needs investigation.
Interesting indeed, I'm not aware of any code in Kate that crease an own
instance of QStyle. I may be wrong, though...
No no it is definitly not related to kate. Happens in all applications
(in fact either KApplication or QApplication, last time I checked), I
just took kate as an example. Could have been okular, or anything.
You're definitly off the hook !
Greetings
Dominik
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