[vtkusers] Fwd: Why these leaks reported/happens?

[Alex Malyushytskyy]

I've sent this message a while ago, but it did not appear in the
Digest  I receive, so forwarding it again.

Regards,
  Alex


---------- Forwarded message ----------
From: Alex Malyushytskyy <alexmalvtk at gmail.com>
Date: Tue, Jan 12, 2010 at 4:04 AM
Subject: Why these leaks reported/happens?
To: vtkusers at vtk.org


I am using VTK on Windows XP 64 bit, compiled with msvc2005 (SP1) and Qt4.6

I have mostly every instance of  vtkObject I create reported as a leak.

For example

a) If following function  is called twice I  get  2 instance of
vtkSTLReader reported leaking.

vtkPolyData* ubAbstractStructurePresentation::createPolyDataFromStlFile(
const QString& fileName )
{
       vtkPolyData* poly = NULL;
       Q_ASSERT( !fileName.isEmpty() );

       if( ! fileName.isEmpty() )
       {
               vtkSmartPointer<vtkSTLReader> sr =
vtkSmartPointer<vtkSTLReader>::New();
               QByteArray byteArray = QFile::encodeName ( fileName );
               sr->SetFileName( byteArray.data() );

       vtkSmartPointer<vtkGeometryFilter> filter = createGeometryFilter();
               filter->SetInputConnection( 0, sr->GetOutputPort( 0 ) );
               filter->Update();

               // make poly forget about the way it was created and
release all the
vtkObjects
               poly = filter->GetOutput();
               poly->Register(NULL);
               poly->SetSource(NULL);

#ifdef DEBUG_POLY_DATA_MEMORY_LEAKS
               poly->DebugOn();
#endif
       }

       return poly;
}

I expected that sr will destroy associated vtkSTLReader as son it goes
out of scope, are my expectation wrong?

b)  The instance of the my widget has  a smart pointer to
vtkEventQtSlotConnect as a member .
Even though I checked that my widget is destroyed and it seems that my
code is pretty simple, vtkEventQtSlotConnect is stil reported as a
leak:

// declaration of the class member in header file:
       vtkSmartPointer<vtkEventQtSlotConnect> Connections;

// only function touching Connections

void model3dView::initVtkConnections()
{
 Connections = vtkEventQtSlotConnect::New();

 // connect window enter event to radio button slot

 Connections->Connect( this->GetRenderWindow()->GetInteractor(),
            vtkCommand::EndPickEvent, this, SLOT(  onEndPickEvent() ));

 Connections->Connect( this->GetRenderWindow()->GetInteractor(),
            vtkCommand::StartEvent, this, SLOT(  onStartPickEvent() ));

 Connections->Connect(
this->GetRenderWindow()->GetInteractor()->GetInteractorStyle(),
            InteractionModeSetStartEvent, this, SLOT(
onInteractionModeChangedByInteractor() ));

}

c)  Am I doing something wrong? Can debug leak option be used with
smart pointers?

Thanks in advance,
 Alex