[vtkusers] HowTo pick vtkTextActor?

[Veerapuram Varadhan]

Hi All,

Is there a way to pick vtkTextActor?  I tried with vtkCellPicker and
vtkPropPicker, both are not picking the vtkTextActor.  This is the piece
of code that i used to define the picker and to pick my text actor.

  this->AnnoPicker = vtkPropPicker::New();
  this->AnnoPicker->AddPickList (this->TxtActor);
  this->AnnoPicker->PickFromListOn();
  ....
  ....
  ....
  ....
  ....
  ....

void vtkAnnotationWidget::OnMouseMove()
{

  int found = 0;
        // We're only here is we are enabled
  int X = this->Interactor->GetEventPosition()[0];
  int Y = this->Interactor->GetEventPosition()[1];

  // Okay, we can process this. If anything is picked, then we
  // can select the annotation.
  vtkAssemblyPath *path;
  this->Interactor->FindPokedRenderer(X,Y);
  this->AnnoPicker->Pick(X,Y,0.0,this->CurrentRenderer);
  path = this->AnnoPicker->GetPath();

  if (path != NULL)
  {
          // Deal with the possibility that we may be using a shared picker
path->InitTraversal();
          vtkAssemblyNode *node;
          for (int i = 0; i < path->GetNumberOfItems() && !found ; i++ )
          {
                  node = path->GetNextNode();
                  if ( node->GetProp() ==
vtkProp::SafeDownCast(this->TxtActor) ) {
                          found = 1;
                  }
          }
  }

The "found" variable is always 0, even if I move the mouse over the actor.

Am I missing anything in the above code?

TIA,

V. Varadhan.