stuartmorgan 3d41b8b415 Send scroll events from the macOS shell (flutter/engine#8056) ...

Adds scroll event handling to the macOS shell, sending them using the
new embedding API.

Currently, trackpad scrolling is just handled like scrollwheel
scrolling, since the trackpad-gesture-based scroll handling in Flutter
is still in progress.

Adds code to synthesize Add events if mouse tracking isn't enabled,
so that it doesn't rely on Flutter being lenient about handling events
from pointers that have never been added.

2019-03-06 13:15:01 -08:00

..

src/flutter

Send scroll events from the macOS shell (flutter/engine#8056)

2019-03-06 13:15:01 -08:00