Disable single-finger scrolling and improve thumb filtering
This change removes single-finger scrolling, i.e. scrolling by leaving
one finger in place and moving another. This allows for more aggressive
thumb detection, which in turn allows users to leave a finger on the
touchpad for clicking while using the other hand for gestures normally.
BUG=chrome-os-partner:36804690
TEST=Ran on touchtest regression suite. Added test cases where a
stationary finger should be ignored.
Determined the prevalence of single finger scrolling
using feedback logs. See bug for details.
Change-Id: Id4fad2ce54fcde9b91f7929aad238954183b7df0
Reviewed-on: https://chromium-review.googlesource.com/466617
Commit-Ready: Sean O'Brien <seobrien@chromium.org>
Tested-by: Sean O'Brien <seobrien@chromium.org>
Reviewed-by: Charlie Mooney <charliemooney@chromium.org>
3 files changed
