Re: [wxVTK] wxVTK and wxWidgets 2.8

[Sander N. <nie...@st...>]

On 2 jan 2008, at 14:35, Marco wrote:

> your patch solved both the problems. Is it going to be merged with the
> official wxVTK?

It would be nice, but this is up to Mathieu. Furthermore, I haven't  
tested my patch with older versions of wxWidgets/VTK, so I don't know  
if it breaks anything there. It may be wise to test it first.

> The patch solved this two problems with wxGTK 2.8, but now, with wxGTK
> 2.8 I have the same problem I have using wxGTK 2.6 (as I wrote on
> another thread). Closing the window the application crashes trying to
> delete the wxVTKRenderWindowInteractor. It seems the use of wxglcanvas
> makes the application not to free the resources correctly on my  
> system.
>
> Any idea?

In the destructor of our wxVTKRenderWindowInteractor derived classes  
we use the following:
-----
     SetRenderWindow(NULL);
     SetInteractorStyle(NULL);

     // Normally one has to remove a wxVTKRenderWindowInteractor  
object using 'window->Delete()',
     // but we also would like 'delete window' to work (which is  
needed for e.g. Python wrapping)
     // This should be safe as long as the reference count is 1 (i.e.  
no other objects have a reference to this object)
     // The problem is that we can't use Delete() or Unregister(NULL)  
here, because that would recursively invoke the
     // destructor. Therefore, we just explicitly decrease the  
reference count by 1 if it was 1 (this way you will still
     // get a warning from VTK if the reference count afterwards was  
not 0).
     if (GetReferenceCount() == 1)
     {
         SetReferenceCount(0);
     }
-----

However, the samples already seem to use Delete() instead of 'delete',  
so perhaps setting the renderwindow and interactorstyle to NULL before  
destruction can solve the problem?

> Is there anyone using wxVTK on Ubuntu 7.10?

We are ;)

If you want to see our app (and sources), just download the VISAN  
package from our website: http://www.stcorp.nl/beat
We have a version for Linux, Windows, and Mac OS X.

Best regards,
Sander