[vtkusers] QVTKWidget only partially redrawing itself on win7 without AERO.

[Alex Malyushytskyy]

Thanks,

I already voted.
I would not count on fast bug fix from QT team  though :(.
If I find any solution myself, I will let you know.

Alex.

On Wed, May 2, 2012 at 5:20 PM, Clinton Stimpson <clinton at elemtech.com> wrote:
> It was "fixed" then reverted because the fix was incorrect.
>
> I've narrowed the problem down to a change of behavior in the Qt library, and reported it.
> https://bugreports.qt-project.org/browse/QTBUG-23425
>
> But I've not had much time to look further into it.
> I would suggest working with the Qt developers to get this fixed.  If you can help with that, that would be great.
> I think part of the problem is their QtGui library has code to make a QGLWidget work, but its difficult to turn the same code on for any other OpenGL based QWidget that doesn't derive from QGLWidget.
>
> If you haven't voted for it, please do, so other Qt developers will notice.
>
> Clint
>
> On May 2, 2012, at 5:56 PM, Alex Malyushytskyy wrote:
>
>> Problem on stable release of vtk 5.8.0
>>
>> My application displays splash screen  while model is drawn.
>> When splash screen is gone and user starts interaction with model,
>> only part of the QVTKWidget is displaying correct picture,
>> most area which was not  covered by splash screen remains unchanged
>> (has whatever it displayed before interaction started).
>> If QVTKWidget is minimized/maximized it fixes the problem.
>>
>> If AERO is on everything works as expected.
>> vtk version 4.* did not have such problem.
>>
>> It seems any drawing which happens when QVTKWidget widget is
>> covered(not only to the case of splashscreen)
>> leeds to such nasty behaviour.
>>
>> This makes vtk unusable on win 7 since I can't inforce user to have
>> AERO on, not even counting that some computers might not be able to
>> support it physically.
>>
>> It was an old  conversation about related topic at:
>> http://vtk.1045678.n5.nabble.com/Problem-with-QVTKWidget-not-expanding-in-win7-td4533383.html
>>
>> Even though it was stated that problem should be fixed in 5.8., it
>> still remains.
>>
>> Could anybody point which changes should be made to fix a problem and
>> is there a way to push patch that problem finally is fixed in an
>> official version?
>>
>> Regards,
>>
>> Alex
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