[vtkusers] value picking from popup box

[arwtyxouymz]

Hi,

I have a problem with value picking from vtkChartXY popup box.
https://lorensen.github.io/VTKExamples/site/Cxx/Plotting/LinePlot/
In this example code, hovering mouse over the point, the rectangle box will
appear and it contains the x, y values at the point like this image.

<http://vtk.1045678.n5.nabble.com/file/t342066/ChartXY.png> 


I want to get these x, y values.

How should i do?



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