[vtkusers] Some bugs about vtkSphereWidget?

[GeeKer Wang]

When I checked the source code of vtkSphereWidget.cxx,
vtkSphereWidget2.cxx and vtkSphereRepresentation.cxx in vtk6.1.0, I
found following problems:

1. vtkSphereReprentation::SetHandlePosition() does not make the
HandlePosition[3] updated

2. vtkSphereWidget2::TranslationEnabled/ScalingEnabled never used

3. vtkSphereWidget::SetHandleDirection() does not work before
PlaceHandle() is called

Are they bugs or just some kind of convention?

-- 
Wentao Wang