Issue by Hixie
Thursday Aug 27, 2015 at 17:12 GMT
Originally opened as https://github.com/flutter/engine/issues/888

Right now scrollables use ScrollDirection and they're backed by render objects that use BlockDirection. However, that means ScrollDirection.both has no good mapping.

We should clean this up. I think we should probably still have two enums, one with "horizontal" and "vertical" and one with "horizontal", "vertical", and "both", but we should not split it across Block vs Scroll, instead of should split it according to who supports "both" and who doesn't.