[vtkusers] picked cell highlight

[czbebe]

Dear David,

class MouseInteractorStyle
   ------
    vtkSmartPointer<vtkUnstructuredGrid> Data;
    //vtkSmartPointer<vtkPolyData> Data;

main
    vtkSmartPointer<vtkUnstructuredGrid> ug =
    vtkSmartPointer<vtkUnstructuredGrid>::New();
    ------
    style1->Data = ug;

is all right. I can do it.
If next cell is selected, previous cell highlight disappeared.
I want to left it highlighted and also pick next time, want
to erase it.
Is it possible？

Best regards,

Oka
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