Is there any way to "overscroll" a PhotoView?

[jeffreyfjohnson]

I would like to be able to overscroll a PhotoView. For example, if a user zooms in and scrolls all the way to the bottom of the image contained in the PhotoView, and then keeps pulling the image upward, I would like the PhotoView to realize it has scrolled to the edge of its bottom bound, and then essentially translate upwards. Currently you cannot do this, in this example the bottom of the image cannot be scrolled beyond the bottom of the PhotoView itself.

I tried implementing this custom, by wrapping the PhotoView in a custom ViewGroup, and overriding requestDisallowInterceptTouchEvent in the ViewGroup, but from what I've gathered from logs I added, PhotoView doesn't call that method in a way that makes it easy to implement what I want