If is it possible set crop window to fix place and move background image instead?

This is very good lib. But I would like to know if is it possible make crop window fix place and move image that on the background to chose place to crop.

Like here

https://github.com/Yalantis/uCrop

Thanks

Start by comparing the library's current crop interaction with the behavior shown in the linked uCrop example. The work is complete when the crop window remains fixed while the background image can be moved to choose the crop area.

Written by the indexing model from the issue text.