Disable scroll only in a div

I need to disable the scroll of every page only while the user is sliding your finger on a particular area, or while the user stowing position the image directive.

The box with the picture is the policy that allows the image to be dragged up and down, but when the image is dragged the page also scroll

looks like he is my directive today: https://github.com/1fabiopereira/cover-draggable/blob/master/dist/unminify/cover-draggable.js