[texworks] mouse-wheel / slider cause TeXworks inmediate crash, issue broadens

[Stefan Löffler]

Hi,

On 2011-01-26 11:22, Paul A Norman wrote:
>
> On 26 January 2011 08:39, Stefan Löffler <st.loeffler at gmail.com
> <mailto:st.loeffler at gmail.com>> wrote:
>
>
>     On 2011-01-25 06:32, Paul A Norman wrote:
>     > It seems like a Qt framework issue?
>
>     Indeed, I think so too. I've tried to get some help on the dev forums
>     (http://developer.qt.nokia.com/forums/viewthread/3176/), but to no
>     avail
>     so far... :(
>

OK, I finally figured out what the problem is and posted a patch. It
turned out that this has already been fixed upstream and will land in
the next bugfix release (4.7.2). Until then, I adapted my Windows Qt
build to include that particular patch. I don't know if this solves the
scrolling issue (I haven't been able to reproduce that myself), but it
should fix the spacebar issue. I've posted r728 build2 on GC (since
there no problems with r728 were reported in the other thread so far) -
please check.

NB: This issue is memory-related (in the worst case (which we
encountered), 2 GB were allocated to represent a simple rectangle).
Consequently, this issue should a) not occur on systems with enough
memory and b) depends on the system (and how it allocates memory).
Since on Linux, we generally use prepackaged libraries, this fix won't
be included in those builds. If this patch turns out to really fix the
issue, I will add it to the repository, though, so everyone who wants
can include it in a Qt private build.

HTH
Stefan
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