Get x y z coordinates form Q3dScatter graph on mouse click..

[Eliot_sam]

Im using Q3dscatter graph to visualize my data.
Using Qcustome3dvolume the data is given to the scatter graph.
i have used mouse click event but im getting whole graphs x,y coordinate but i like to have 3d axis x,y,z.

Have anyone tried to get coordinate xyz in scatter 3d graph with mouse click or have any idea to implement it.