Draggables moving behaviour inverted in some cases

[jesstelford]

Bug or feature request?

Bug

Expected behavior

1. Draggable moves out of the way once center of gravity of dragged item moves over it.
2. Draggable only moves out of the way when dragging toward it

Actual behavior

1. Draggable is moving out of the way before center of gravity of dragged item has moved over it, because...
2. moving the dragged item away from a draggable makes that draggable move out of the way (or, rather; into the way).

Steps to reproduce

Gif:

What version of React are you using?

16.7.0-alpha

What version of react-beautiful-dnd are you running?

10.0.1

What browser are you using?

Chrome 71.0.3578.98 (Official Build) (64-bit)

Demo

I haven't taken time to extract a demo yet, but @alexreardon feel free to come look over my shoulder at my setup next time we're in the same place 👍

[alexreardon]

Let's look at together when you are in our office next 😊

[alexreardon]

I suspect it is a rough edge of our algorithm for displacement.

[alexreardon]

Tracking here: #930