[vtkusers] Handle on vtkSeedWidget

[Xiaopeng Yang]

Dear Users,

 

I need to put markers on just one specific slice at a time. But the testing
code of vtkSeedWidget cannot make it. After I put a marker at a slice, if I
go to the other slices, that marker always appears. How to make it disappear
when I go to different slices?

 

Thank you so much!

 

Best regards,

Xiaopeng Yang

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