tree 1c9abe8edb17f1b4e7a6c6b9481eae73ba1fc9e6
parent b88894c8811b32d312a56234fd7354314ff43cd7
author Jim Van Verth <jvanverth@google.com> 1568062419 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1568122487 +0000

Hook up pinch-zoom and swipe gestures.

Sets UIPinchGestureRecognizer and UISwipeGestureRecognizers and
passes the result down to the sk_app::Window. To simplify detection,
swipes take precedence over pans, and pans require a single touch.
This is less flexible for the app, but in most cases I think is
what we want.

Bug: skia:8737
Change-Id: Ib031b6ad465d3a353da29d7e0b48a666d4ff8b9a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/239776
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>