[vtkusers] Problem VTK4 + python 2.2

[David Gobbi]

Hi Emmanuel,

Any problems you see with the wxVTKRenderWindow are likely to
be either in wxWindows (like both me and Prabhu said, use 2.2.x
if you want to guarantee stability) or in the video driver
(I'm using nVidia-GLX 1.0-1512).  To check SMP issues you can
always boot single-processor and see if the problems go away.

The parts of VTK and of Python that the wxVTKRenderWindow depends
have been almost unchanged for years, so different versions of VTK
or of Python are unlikely to have any effect.  The parts of wxGTK
that the wxVTKRenderWindow depends on (specifically the file
src/gtk/window.cpp) changes significantly with every single point
release.

Also please read the comments in wxVTKRenderWindow.py, there are
a couple flags you can turn on or off that might help.

 - David

--
  David Gobbi, MSc                       dgobbi at irus.rri.ca
  Advanced Imaging Research Group
  Robarts Research Institute, University of Western Ontario

On Wed, 16 Jan 2002, Emmanuel Olart wrote:

> Hi david, prabbhu
>
> I finally managed to make all works after trying to downgrade, to python
> 2.1, vtk 3.2 and a lot of other strange things .
>
> The final point was to downgrade to wxPython 2.3.1
>
> It then works with python 2.1/2.2 and vtk 3.2 / 4
>
> Maybe there is an issue with smp machines and wxGTK 2.3.2 or maybe with
> my video card (geforce 3 ti 200)
> I posted on the wxPython list and i ll post here to conclude this topic
> when this issue is solved.
>
> Thx for your help
>
> Regards
>
> Emmanuel
>
> David Gobbi wrote:
>
> >Hi Prabhu,
> >
> >On Tue, 15 Jan 2002, Prabhu Ramachandran wrote:
> >
> >>There were two lines that needed changing for me.
> >>
> >>$ diff wxVTKRenderWindow.py /tmp/wxVTKRenderWindow.py
> >>197c197
> >><         self._RenderWindow.SetSize(size[0], size[1])
> >>---
> >>
> >>>        self._RenderWindow.SetSize(size.width, size.height)
> >>>
> >>237c237
> >><         width, height = event.GetSize()
> >>---
> >>
> >>>        width, height = event.GetSize().asTuple()
> >>>
> >
> >I'll fix these.  They have to do with differences between the
> >wxPython 2.2.x and wxPython 2.3.x, I want the wxVTKRenderWindow
> >to work with both if possible.
> >
> >>Once these were done it worked well.  I looked through your code and
> >>it looks nice.  Its a good idea to use the GL Canvas.  I believe Dave
> >>Reed found that using a GLCanvas in the GtkRenderWindow also helped a
> >>lot.  One design question.  The way my wxVTKRenderWindow was written
> >>was with a base and derived class.  This was done so that it would be
> >>easier for a user to incorporate their custom interaction.  Any
> >>reasons why you didnt do it this way?
> >>
> >
> >Because it's easy enough for people to just override the methods they
> >want to change the behaviour of.  The documentation in the file clearly
> >specifies what the default interaction is set to, and what methods
> >have to be overridden to change it.
> >
> >>There is one small bug that I found.  If you just fire up
> >>wxVTKRenderWindow.py and then hit any key (before you move the mouse)
> >>it will raise an exception.  This is because UpdateRenderer is not
> >>called untill the mouse is pressed so there is no
> >>self._CurrentRenderer.  One way to fix this is to call UpdateRenderer
> >>on OnEnter.  What do you think?
> >>
> >
> >I'll fix this.
> >
> >>The other issue is that if you call Render on the window before it is
> >>realized then parenting doesnt occur properly.  i dont know if your
> >>loop that calls the parent's Show handles this case?  I guess it does.
> >>
> >
> >This gets into the whole wxGTK mess and also the WindowId mess.  I don't
> >plan on looking any deeper into this, myself.
> >
> >Okay, I just did the fixes and committed.
> >
> > - David
> >
> >
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>
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