commit b3b386b5f4f0dd757ff5d4a34fb978265bcb7fe3
author Travis Skare <skare@chromium.org> Thu Sep 23 23:44:11 2021
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> Thu Sep 23 23:44:11 2021
tree 609e9de21e5e315ab98654fa022638c220321781
parent f8fbc236a52f29fce7dbd6abec80c68199b46586

[LongScreenshots] Auto-scroll view when dragging at edge of screen.

This is slightly janky in that in practice the user will have to perform
a drag gesture across the bounds of the imageview, potentially a few
times to scroll the view to the desired place. However, ideally that
makes it more obvious the view is scrollable and they can use the
preferable, traditional, ImageView native scroll support; landing this
so we can experiment with it and discuss, since it's our remaining P1.

This approach could potentially be smoothed by having a timer and
auto-scrolling+auto-repositioning the mask every N milliseconds, but
that is more fragile across devices and the failure modes are harder
to catch (scrolling too fast, for example)

Fixes: 1249219

Change-Id: I5aa67688bfa06b2c053752d2ef9fd24f42e2c9f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3177421
Commit-Queue: Travis Skare <skare@chromium.org>
Reviewed-by: Kyle Milka <kmilka@chromium.org>
Cr-Commit-Position: refs/heads/main@{#924543}