[vtkusers] vtkContourWidget Initialize

[dean.inglis at camris.ca]

there does not appear to be a method
to reset vtkContourWidget to its initial
undefined state.  I had been using a modified
local version so that I could do this:
widget->Initialize(NULL);
which would clear out the representation
and leave the widget in define state:

void vtkContourWidget::Initialize( vtkPolyData * pd, int state )
{
  if (this->WidgetRep)
	{

	vtkContourRepresentation *rep =
	  reinterpret_cast<vtkContourRepresentation*>(this->WidgetRep);

	if ( pd == NULL )
	  {
	  while( rep->DeleteLastNode() );
	  rep->ClosedLoopOff();
	  this->WidgetState = vtkContourWidget::Define;
	  rep->BuildRepresentation();
	  return;
	  }

	rep->Initialize( pd );
    this->WidgetState = (rep->GetClosedLoop() || state == 1 ) ?
		  vtkContourWidget::Manipulate : vtkContourWidget::Define;
    }
}  

but this is not working as expected.
Any suggestions?

regards,
Dean