[vtkusers] cell picking

[oka]

Dear VTK users,

When using example of cellPicking 
http://www.vtk.org/Wiki/VTK/Examples/Cxx/Picking/CellPicking
I want to erase highlight when I pick again the same cell once
selected. Is it possible ?
I met cases  GetCellID value change to "0" if double clicked.
Is it correct ?
Normally GetCellID is ID number of selected cell id, I know.

Best regards,

Oka
-- 
oka <oka at bpe.es.osaka-u.ac.jp>