I was looking at a variety of different photo viewers like elevateZoom, greasy fork, jQuery Remooz among many others. I couldn't find any with my specific requirements. I'm looking for a splice between these two:

https://www.rubylane.com/item/260004-2751/Antique-Metal-Dresser-Box78-Casket-Cupid

http://igorlino.github.io/elevatezoom-plus/examples.htm (scroll right down to "Mousewheel zoom" and "Image Constrain" for the thumbnails and mousewheel zoom)

The interface is a lot prettier, more modern, it has arrows, thumbnail images, and I need that feature where you could hover over the image and a window pops up with the enlarged version.

I can't find an easy enough image viewer which I can implement myself (I need docs with it). Anyone heard of a photo viewer like this?