[vtkusers] Using MacBook trackpad freezes application

[David Gobbi]

Hi Enzo,

Can you also report what version of Qt you are using?  Be sure to include
the patch number, e.g. Qt 4.8.5.

 - David

On Wed, Feb 1, 2017 at 11:43 AM, Enzo Matsumiya <enzo.matsumiya at gmail.com>
wrote:

> Hi,
>
> I'm experiencing exactly this bug, though not only when scrolling,
> dragging also freezes:
>
> http://www.paraview.org/Bug/view.php?id=15822
>
> - macOS 10.11 or 10.12
> - QVTKWidget, vktResliceImageViewer with a DICOM data set
> - Either VTK 7.0 or 7.1
>
> I normally use the MacBook connected to an external monitor, keyboard and
> mouse (non-Apple). I just recently stumbled on this issue when I needed to
> work with it on my lap.
>
> When using an external mouse, everything works fine.
> When using the trackpad, it *looks* like it worked (windowing is changed,
> reslice occurs, etc), but it stats getting so slow that the application
> freezes. The external trackpad has the same behaviour (not sure this is
> obvious). If it's not very clear, please download the videos attached to
> the bug report mentioned.
>
>
> I hope there is some solution for this.
>
>
> Thank you very much!
>
> --
>
> Enzo Ferlin Matsumiya
> enzo.matsumiya AT gmail DOT com
>
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