[vtk-developers] Interaction with color/opacity editors in vtkChartXY broken on retina display

[Elvis Stansvik]

2017-05-29 17:34 GMT+02:00 Utkarsh Ayachit <utkarsh.ayachit at kitware.com>:
> I suspect there's a bug in Qt when it comes to reparenting QOpenGLWidget. I
> can reproduce an issue with ParaView on linux when I simply undock the Color
> Map Editor and then redock it. The Color/Opacity widgets stay black. Looking
> at the code, I see this [1] happens when the dock widget is docked back into
> the main window. As expected the OpenGL context is destroyed, and
> QVTKOpenGLWIdget correctly does the cleanup. But the QVTKOpenGLWidget never
> gets a follow on paintGL call (unless I mouse over to resize the dock panel
> manually). Thus QVTKOpenGLWidget new repaints into the newly minted
> OpenGLContext/FBO resulting in a black widget.

Ah, in my case I don't think there's reparenting involved though.

My problem was that the interactor's size was never updated to cover
the render window when it was initially shown (I think), see my other
mail just now.

Gotto head home, but will debug more tomorrow.

Elvis

>
> Utkarsh
>
> [1]
> https://code.woboq.org/qt5/qtbase/src/widgets/kernel/qopenglwidget.cpp.html#1418
>
>
> On Mon, May 29, 2017 at 11:06 AM, Marcus D. Hanwell
> <marcus.hanwell at kitware.com> wrote:
>>
>> On Mon, May 29, 2017 at 9:32 AM, Elvis Stansvik
>> <elvis.stansvik at orexplore.com> wrote:
>> >
>> > 2017-05-29 15:26 GMT+02:00 Sebastien Jourdain
>> > <sebastien.jourdain at kitware.com>:
>> > > You need to set the size on the interactor.
>> >
>> > Ah, how do I do that? (sorry for being a bit dumb)
>> >
>> > I've been scouring over the PV code, and I can't see that it does
>> > anything special with its interactor. It seems to just hook it up:
>> >
>> I assume you are using QVTKOpenGLWidget, we use this directly in
>> Tomviz for a few charts that control color/opacity too. This should be
>> handled in the QVTKOpenGLWidget, but it is possible an initialization
>> bug has crept in. I have noticed that ParaView often doesn't see this
>> issues as much due to resizing Qt widgets several times on startup, I
>> will see if I can get some time to test the latest Tomviz (we had this
>> working, but I haven't been tracking VTK master as closely these last
>> few weeks).
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Search the list archives at: http://markmail.org/search/?q=vtk-developers
>>
>> Follow this link to subscribe/unsubscribe:
>> http://public.kitware.com/mailman/listinfo/vtk-developers
>>
>