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... Greetings Dominik _______________________________________________ Kde-frameworks-devel mailing list Kde-frameworks-devel@kde.org https://mail.kde.org/mailman/listinfo/kde-frameworks-devel