[vtkusers] The real difference between QVTKWidget and QVTKWidget2

[Shawn Waldon]

Hi Mike,

What version of VTK are you using?  I know there were some fixes that went
in for QVTKWidget2 last summer (I think right around the time VTK 7 was
released).  If you are using VTK 6.X then those may have fixed the problem
you are seeing.

Shawn

On Fri, Apr 29, 2016 at 2:44 PM, Michael Jackson <
mike.jackson at bluequartz.net> wrote:

> We are also getting a similar issue on OS X? Has anyone else seen this
> problem? Is QVtkWidget2 ready for use or does it need more development time
> on OS X?
>
>
> Thanks
> --
> Mike Jackson  [mike.jackson at bluequartz.net]
>
> on March 10 2016 Thales Luis Rodrigues Sabino wrote:
>
> I'm building an application that uses VTK for visualization.
> My initial intent was to process large volumes of data.
> My application is being built with Qt + VTK.
>
> When I started coding the visualization toolkit with VTK I found the
> *QVTKWidget*. So far so good, I found another one, called *QVTKWidget2*. In
> the *QVTKWidget2*.h header there is the following statement:
>
> *// .NAME QVTKWidget2 - Display a vtkRenderWindow in a Qt's QGLWidget.*
> *// .SECTION Description*
> *// QVTKWidget2 provides a way to display VTK data in a Qt OpenGL widget.*
>
> Well, since this class uses the *QGLWidget* (which BTW is now deprecated,
> replaced by *QOpenGLWidget*), I decided to use this one. I also based my
> decision in some discussion I read about *QVTKWidget2* being a future
> replacement for the *QVTKWidget* class.
>
> Everything was fine until I decided to run my application on MacOS and the
> QVTKWidget2 object was crashing in initialization.
>
> I then replaced my widget to one of *QVTKWidget* and everything is now
> working fine (at least in the initial tests).
>
> So, with this context, my question is, do I get any advantage by using
> *QVTKWidget2*?
>
> My first thought was *'yes'*, since the *QVTKWidget* is a subclass of
> *QWidget*.
>
> Hope someone could clarify this for me.
>
> --
> Thales Luis Rodrigues Sabino
>
>
>
>
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