[vtk-developers] Delayed mouse interaction due to event-loop bug in Qt5

[Elvis Stansvik]

2017-04-10 21:10 GMT+02:00 Elvis Stansvik <elvis.stansvik at orexplore.com>:
> 2017-04-10 20:07 GMT+02:00 Pat Marion <james.patrick.marion at gmail.com>:
>> Hi Elvis,
>>
>> In prior emails you mentioned that you use a QVTKWidget subclass (or
>> QVTKWidget2?) that contains a workaround for this event issue.  Is this
>> class something that you can share?  Do you recommend using this workaround,
>> or is the patched qt5.5 preferable?
>
> Sure, I'm attaching VTKWidget.h/cpp, which contains the QVTKWidget
> subclass I'm currently using.
>
> If I remember correctly, it was David Gobbi who led me to this
> workaround, so he should have the credit.

My bad, it was Clint and David together who helped me out. This was
the original thread:

    http://public.kitware.com/pipermail/vtkusers/2016-July/095802.html

Elvis

>
> It's of course preferable to use a fixed Qt (5.6 or higher, or patched
> 5.5.1), but I'll use this workaround until the patched package is in
> the xenial-updates repo (the upload to xenial-proposed seems to take
> some time, I guess the approvers are busy).
>
> Elvis
>
>>
>> Pat
>>
>> On Mon, Mar 20, 2017 at 4:55 PM, Elvis Stansvik
>> <elvis.stansvik at orexplore.com> wrote:
>>>
>>> > On Mon, Jul 13, 2015 at 16:51:34 -0400, Ben Boeckel wrote:
>>> >> On Mon, Jul 13, 2015 at 15:00:56 -0400, Ben Boeckel wrote:
>>> >>>     https://codereview.qt-project.org/#/c/115531/
>>> >>
>>> >> Applying this patch (with one conflicting hunk) to 5.5.0 fixes the
>>> >> problem for me. I'll poke the review to see if some movement can't be
>>> >> made.
>>> >
>>> > It looks like the patch has been merged for 5.6.0 (due at the end of
>>> > October).
>>>
>>> Just in case anyone is in the same boat like me, hitting this bug on
>>> Ubuntu 16.04 LTS (which has Qt 5.5.1), just FYI I'm trying to get an
>>> SRU (Stable Release Update) going with this fix:
>>>
>>>
>>> https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1598173
>>>
>>> Elvis
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>>