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Initial checkin of spot presentation for touchpad gestures. (DO NOT MERGE) 

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: Ib647dbd7a57a7f30dd9c6e2c260df51d7bbdd18e
This commit is contained in:
Jeff Brown 2011-04-12 22:39:53 -07:00 committed by Jeff Brown
parent fa785531f7
commit d3e6d3e763
3 changed files with 16 additions and 1 deletions
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5
include/ui/Input.h
View File

@ -608,6 +608,11 @@ private:
// Oldest sample to consider when calculating the velocity.
static const nsecs_t MAX_AGE = 200 * 1000000; // 200 ms
// When the total duration of the window of samples being averaged is less
// than the window size, the resulting velocity is scaled to reduce the impact
// of overestimation in short traces.
static const nsecs_t MIN_WINDOW = 100 * 1000000; // 100 ms
// The minimum duration between samples when estimating velocity.
static const nsecs_t MIN_DURATION = 10 * 1000000; // 10 ms

9
libs/ui/Input.cpp
View File

@ -831,6 +831,7 @@ 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;
@ -857,6 +858,14 @@ 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;

3
libs/utils/Looper.cpp
View File

@ -662,7 +662,8 @@ void Looper::wakeAndLock() {
#endif
void Looper::sendMessage(const sp<MessageHandler>& handler, const Message& message) {
sendMessageAtTime(LLONG_MIN, handler, message);
nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
sendMessageAtTime(now, handler, message);
}
void Looper::sendMessageDelayed(nsecs_t uptimeDelay, const sp<MessageHandler>& handler,