How to select points in point cloud using C++

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

I'm looking into how to select points in a point cloud in c++, but I can't figure out how to do it.
In python “mouse_and_point_coord.py” sample program describes how to do this.

Are there C++ example program like “mouse_and_point_coord.py”?
I'm thinking of implementing this program in C++, but how should I implement callbacks like python's set_on_mouse function in C++?