Jonah Williams b1d17c914d
Deprecate VelocityTracker default constructor and added VelocityTracker.withKind constructor (#66043)
We've gotten feedback that the VelocityTracker change was disruptive, though it did not break any of the flutter framework or customer tests. In order to make the change non-breaking, PointerDeviceKind parameter can be made optional.

Nevertheless, this parameter should be provided so that the existing touch handlers can use more accurate gestures on mouse/stylus inputs, so we can encourage this by deprecating the default constructor and pointing users towards the VelocityTracker.withKind constructor that takes a non-optional parameter
2020-09-17 15:18:31 -07:00
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