[vtkusers] VTK-Win32 problem only : including vtk includes windows.h

[REGAT-BARREL Aurélien]

    The code above works differently Windows and Linux not because of inclusion of , but because of differences in compilers.
    The problem is that you overrode the GetClassName incorrectly - the correct signature should be const char* GetClassName() const and this code works as it was intended.
    
You're right, i didn't override GetClassName correctly.
But, now that it is correctly overriden, I get the GetClassNameA problem... and it works.
I wondered how that was possible, and I tried this under Windows :
  #include <vtkObjectBase.h>
  #include <stdio.h>
  
  #undef GetClassName

  class MyEmptyObject : public vtkObjectBase
  {
  public:
      virtual const char * GetClassName() const
      {
          return "MyEmptyObject";
      }
  
  };
  
  int main()
  {
      vtkObjectBase * o = new MyEmptyObject;
      printf( "%s\n", o->GetClassName() );
  }
Compiler error : "error C2039: 'GetClassName' : is not a member of 'vtkObjectBase'"
Oh my god... does it means that ...
http://www.chez.com/regatbar/getclassname.png
Yes, all vtk classes implement GetClassNameA and not GetClassName.
And this is also true for
  int vtkDirectory::CreateDirectoryA(char const *)
  class vtkObject * vtkCollectionIterator::GetObjectA(void)
  class vtkProp * vtkAssemblyNode::GetPropA(void)
  void vtkViewport::RemovePropA(class vtkProp *)
  void vtkAssemblyNode::SetPropA(class vtkProp *)
this is just for vtkCommon.
This works well because all VTK code includes <windows.h>.
But, it is a potential pitfall for user code which does not include vtk everywhere.
That was my case yesterday.


Aurélien REGAT-BARREL
		
---------------------------------
Yahoo! Mail : votre e-mail personnel et gratuit qui vous suit partout !
Créez votre Yahoo! Mail

Dialoguez en direct avec vos amis grâce à Yahoo! Messenger !
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20040512/3c891e0c/attachment.htm>