[vtkusers] Point Pick on vtkContextView

[arwtyxouymz]

Hi,

I want to point pick on vtkContextView by mouse moving.

Concretely, I refer to this example
https://lorensen.github.io/VTKExamples/site/Cxx/Plotting/LinePlot/

and I want to pick up x value at mouse pointer from the figure in this
example.

I think I should use vtkContextInteractorStyle and vtkPropPicker classes,
but I don't know how i should do coding.

Can you help me?
please.



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