Hi Kyle,
Thanks for your reply.
I believe I have got the latest version of VTK (which is 8.2.0) downloaded recently from https://vtk.org/download/
Could you please help me find the latest version of the touchscreen example you provided?
I am using this one: https://gitlab.kitware.com/vtk/vtk/tree/6488ef5d38d2eae1ff79d78a0922a7f5b6af828f/Examples/GUI/Qt/TouchGestureViewer
Please let me know if this is correct.
Thank you once again.