<![CDATA[[SOLVED] QGraphicsBlurEffect messing up with performances]]>Hello,

I am currently using a QGraphicsBlurEffect on a pixmap of my mainWindow and pop up a new window that is modal (a really beautifull effect:) )
Anyway I use a QScrollArea on this modal window and the scrolling is very slow. I am prety sure it is because Qt refreshes the blur effect of the background regulary.
Anyway, I would like to know is there's some kind of way to freeze the frame of the blured picture ( it's of course a static picture that is blured ) to improve the perfomances.

Thanks

]]>https://forum.qt.io/topic/6463/solved-qgraphicsblureffect-messing-up-with-performancesRSS for NodeTue, 14 Apr 2026 15:50:16 GMTTue, 07 Jun 2011 15:50:01 GMT60<![CDATA[Reply to [SOLVED] QGraphicsBlurEffect messing up with performances on Fri, 10 Jun 2011 08:55:42 GMT]]>That's right, I couldn't figure how to edit the title...!
thanks

]]>https://forum.qt.io/post/91653https://forum.qt.io/post/91653Fri, 10 Jun 2011 08:55:42 GMT<![CDATA[Reply to [SOLVED] QGraphicsBlurEffect messing up with performances on Thu, 09 Jun 2011 15:24:25 GMT]]>Good to hear you figured it out. Could you add [Solved] in front of the title (by editing the first post), please?

]]>https://forum.qt.io/post/91551https://forum.qt.io/post/91551Thu, 09 Jun 2011 15:24:25 GMT<![CDATA[Reply to [SOLVED] QGraphicsBlurEffect messing up with performances on Thu, 09 Jun 2011 07:26:37 GMT]]>It's alright I solved this problem by using @QPixmap::grabWidget()@ in order to set it as background.
Thanks for your help anyway.

]]>https://forum.qt.io/post/91462https://forum.qt.io/post/91462Thu, 09 Jun 2011 07:26:37 GMT<![CDATA[Reply to [SOLVED] QGraphicsBlurEffect messing up with performances on Wed, 08 Jun 2011 21:39:16 GMT]]>I don't know your code so I can't really give a definite answer, but you could look into QPixmapCache to cache your blurred pixmap between paintEvents.

]]>https://forum.qt.io/post/91441https://forum.qt.io/post/91441Wed, 08 Jun 2011 21:39:16 GMT<![CDATA[Reply to [SOLVED] QGraphicsBlurEffect messing up with performances on Wed, 08 Jun 2011 07:17:59 GMT]]>Nobody can help?

In fact, I now see that my problem could be solved simply by being abble to apply QGraphicsBlurEffect to the pixmap itslef only.
But I can't find a method to do it. Does anyone knows a way?

]]>https://forum.qt.io/post/91303https://forum.qt.io/post/91303Wed, 08 Jun 2011 07:17:59 GMT