tree f051945ad94fa246a9ea7536c6195a28c98303c9
parent 43a811979d55587e014134f6050dc90ca918f9ce
author Huahui Wu <hwu@google.com> 1299522138 -0800
committer Huahui Wu <hwu@google.com> 1299620239 -0800

b/3307761 Tuning two fingers pan.

User reports jumpy when trying two fingers pan. This change keeps
track of the previous movements of the fingers' middle point,
compares to the change of the fingers' distance, and decides
to pan or zoom or do both.

Change-Id: I8a6a8e9259db85b0e820b6e25ba0822ed289fb45