[Dcmlib] R: R: vtkGdcmReader and vtkProcessObject

[Mathieu Malaterre]

Awesome !

luca.picello at gmail.com wrote:
> A cast to vtkAlgorithm is neither needed by using:
>  
>     vtkGdcmReader* source = vtkGdcmReader::SafeDownCast(aCaller);
>     if( source != NULL )
>       ProgressBarValue = source->GetProgress() * 100;
> Luca
>  
> thanks all for your infinite patience
>  
>  
> 
>     ------------------------------------------------------------------------
>     *Da:* Luca Picello [mailto:luca.picello at gmail.com]
>     *Inviato:* lunedì 5 giugno 2006 17.35
>     *A:* Mathieu Malaterre
>     *Cc:* dcmlib at creatis.insa-lyon.fr
>     *Oggetto:* Re: [Dcmlib] R: vtkGdcmReader and vtkProcessObject
> 
>     errata corrige:
> 
>     casting 'source' pointer makes it possible to access (without any
>     error) to all vtkAlgorithm methods.
> 
> 
>     On 6/5/06, *Luca Picello* <luca.picello at gmail.com
>     <mailto:luca.picello at gmail.com>> wrote:
> 
>         well well well...
>         I will change compiler when I'll open my fabulous restaurant at
>         carabbeans ;-)
>         anyway even if I understand your point of view, I have the
>         reason why it works with BCB and it seems (to me at least) to be
>         reasonable.
> 
>         both vtkProcessObject and vtkImageReader (then vtkGdcmReader)
>         are derived from vtkAlgorithm where the method GetProgress() is
>         implemented.
> 
>         casting 'source' pointer makes it possible to access (without
>         any error) to all vtkImageAlgorithm methods.
>         Now you make me note it, I know it is wrong. Indeed I'll have to
>         try a safedowncast to vtkAlgorithm which should be the right
>         cast I need for a clean source.
>         when I'll be at home I'll check it, if it is true and if it
>         really works.
> 
>         thanks, as usual, for your support
>         Luca
> 
> 
> 
> 
>         On 6/5/06, *Mathieu Malaterre* < mathieu.malaterre at kitware.com
>         <mailto:mathieu.malaterre at kitware.com>> wrote:
> 
>             luca.picello at gmail.com <mailto:luca.picello at gmail.com> wrote:
>             >  with
>             >  vtkProcessObject* source = (vtkProcessObject*)(aCaller);
>             >
>             >  it works.
>             >  any suggestion is welcome
> 
>             Change your compiler ! This can't be or this is simply an
>             adress (a
>             void* basically) and you cannot use it as a ProcessObject
>             anyway.
> 
>             See:
> 
>             http://www.vtk.org/doc/nightly/html/classvtkProcessObject.html
>             <http://www.vtk.org/doc/nightly/html/classvtkProcessObject.html>
> 
>             It's a leaf, nothing derives from it in VTK 5.x
> 
>             Mathieu
> 
> 
>