From 2352b978a3c94cd88f41d0d908f961333fdac1e9 Mon Sep 17 00:00:00 2001 From: Jeff Brown Date: Tue, 12 Apr 2011 22:39:53 -0700 Subject: Initial checkin of spot presentation for touchpad gestures. Added a new PointerIcon API (hidden for now) for loading pointer icons. Fixed a starvation problem in the native Looper's sendMessage implementation which caused new messages to be posted ahead of old messages sent with sendMessageDelayed. Redesigned the touch pad gestures to be defined in terms of more fluid finger / spot movements. The objective is to reinforce the natural mapping between fingers and spots which means there must not be any discontinuities in spot motion relative to the fingers. Removed the SpotController stub and folded its responsibilities into PointerController. Change-Id: I5126b1e69d95252fda7f2a684c9287e239a57163 --- libs/ui/Input.cpp | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'libs/ui/Input.cpp') diff --git a/libs/ui/Input.cpp b/libs/ui/Input.cpp index bbe579ea83f2..a95f4326193b 100644 --- a/libs/ui/Input.cpp +++ b/libs/ui/Input.cpp @@ -832,6 +832,7 @@ bool VelocityTracker::getVelocity(uint32_t id, float* outVx, float* outVy) const const Position& oldestPosition = oldestMovement.positions[oldestMovement.idBits.getIndexOfBit(id)]; nsecs_t lastDuration = 0; + while (numTouches-- > 1) { if (++index == HISTORY_SIZE) { index = 0; @@ -858,6 +859,14 @@ bool VelocityTracker::getVelocity(uint32_t id, float* outVx, float* outVy) const // Make sure we used at least one sample. if (samplesUsed != 0) { + // Scale the velocity linearly if the window of samples is small. + nsecs_t totalDuration = newestMovement.eventTime - oldestMovement.eventTime; + if (totalDuration < MIN_WINDOW) { + float scale = float(totalDuration) / float(MIN_WINDOW); + accumVx *= scale; + accumVy *= scale; + } + *outVx = accumVx; *outVy = accumVy; return true; -- cgit v1.2.3-59-g8ed1b