Re: Heads-up: Potentially breaking changes to the GDK drawing model pushed


On Mon, Jun 23, 2014 at 9:03 PM, Jasper St. Pierre <jstpierre mecheye net> wrote:
Thanks, I managed to reproduce the issue with this. It only happens with thumbnails visible, though, which suggests that evince is doing something funny for the thumbnails view. I'll also check out Scintilla later.
slow scroll with thumbnails visible is a known bug of Evince since 3.0... Basically we read the thumbnails on the fly and then change the model on a GtkIconView... Since GtkIconView recomputes the hfw (or the wfh don't remember) each time you modify the model (since gtk 3)... each time we read a thumbnail we do a relayout... so yes, we are doing something funny with thumbnails, and slow scroll should have nothing to do with these patches (although It might get more noticeable if other apps are slugish too) 



On Mon, Jun 23, 2014 at 8:19 PM, Colomban Wendling <lists ban herbesfolles org> wrote:
Le 24/06/2014 02:03, Jasper St. Pierre a écrit :
> I can't reproduce any issue in scrolling with evince locally -- does it
> only happen with certain documents? Can you point to a document where
> you have problems?

I doubt it's document-related, as it "worked" with the first three PDFs
I tried with.  Anyway, I can reproduce with e.g.   Note however
that you have to scroll *aggressively*, meaning I'm was assaulting my
mouse wheel for several seconds, or take the scrollbar grip and shake it
quick.  Also it's less directly visible with Evince itself which seems
to have a very cheap scroll draw (yet you probably notice something),
but other apps gets slow-slow (for example gedit's gear menu takes like
5s to open).

I also just tried to enable Metacity's compositing as I was using it
without, and I can reproduce with and without compositing.

> I also just built Scintilla and SCiTE from source, but they both appear
> to be using GTK+ 2, not GTK+ 3. Are you using some unofficial fork or
> port, or did I do something wrong when building Scintilla/SCiTE?

you need to set the GTK3 make variable to 1:

        $ cd gtk
        $ make GTK3=1



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