am 59912d40: am b8145002: am 9f2532bf: Merge "Reduce false swipe-closed...

package com.android.systemui.statusbar.phone;

import java.util.ArrayDeque;

import java.util.ArrayList;

import java.util.Iterator;

import android.animation.ObjectAnimator;

import android.animation.TimeAnimator;

import android.animation.TimeAnimator.TimeListener;

    private TimeAnimator mTimeAnimator;

    private ObjectAnimator mPeekAnimator;

    private VelocityTracker mVelocityTracker;

    private FlingTracker mVelocityTracker;

    /**

     * A very simple low-pass velocity filter for motion events; not nearly as sophisticated as

     * VelocityTracker but optimized for the kinds of gestures we expect to see in status bar

     * panels.

     */

    private static class FlingTracker {

        static final boolean DEBUG = false;

        final int MAX_EVENTS = 8;

        final float DECAY = 0.75f;

        ArrayDeque<MotionEventCopy> mEventBuf = new ArrayDeque<MotionEventCopy>(MAX_EVENTS);

        float mVX, mVY = 0;

        private static class MotionEventCopy {

            public MotionEventCopy(float x2, float y2, long eventTime) {

                this.x = x2;

                this.y = y2;

                this.t = eventTime;

            }

            public float x, y;

            public long t;

        }

        public FlingTracker() {

        }

        public void addMovement(MotionEvent event) {

            if (mEventBuf.size() == MAX_EVENTS) {

                mEventBuf.remove();

            }

            mEventBuf.add(new MotionEventCopy(event.getX(), event.getY(), event.getEventTime()));

        }

        public void computeCurrentVelocity(long timebase) {

            if (FlingTracker.DEBUG) {

                Slog.v("FlingTracker", "computing velocities for " + mEventBuf.size() + " events");

            }

            mVX = mVY = 0;

            MotionEventCopy last = null;

            int i = 0;

            float totalweight = 0f;

            float weight = 10f;

            for (final Iterator<MotionEventCopy> iter = mEventBuf.descendingIterator();

                    iter.hasNext();) {

                final MotionEventCopy event = iter.next();

                if (last != null) {

                    final float dt = (float) (event.t - last.t) / timebase;

                    final float dx = (event.x - last.x);

                    final float dy = (event.y - last.y);

                    if (FlingTracker.DEBUG) {

                        Slog.v("FlingTracker", String.format("   [%d] dx=%.1f dy=%.1f dt=%.0f vx=%.1f vy=%.1f",

                                i,

                                dx, dy, dt,

                                (dx/dt),

                                (dy/dt)

                                ));

                    }

                    mVX += weight * dx / dt;

                    mVY += weight * dy / dt;

                    totalweight += weight;

                    weight *= DECAY;

                }

                last = event;

                i++;

            }

            mVX /= totalweight;

            mVY /= totalweight;

            if (FlingTracker.DEBUG) {

                Slog.v("FlingTracker", "computed: vx=" + mVX + " vy=" + mVY);

            }

        }

        public float getXVelocity() {

            return mVX;

        }

        public float getYVelocity() {

            return mVY;

        }

        public void recycle() {

            mEventBuf.clear();

        }

        static FlingTracker sTracker;

        static FlingTracker obtain() {

            if (sTracker == null) {

                sTracker = new FlingTracker();

            }

            return sTracker;

        }

    }

    private int[] mAbsPos = new int[2];

    PanelBar mBar;

                            mHandleView.setPressed(true);

                            postInvalidate(); // catch the press state change

                            mInitialTouchY = y;

                            mVelocityTracker = VelocityTracker.obtain();

                            mVelocityTracker = FlingTracker.obtain();

                            trackMovement(event);

                            mTimeAnimator.cancel(); // end any outstanding animations

                            mBar.onTrackingStarted(PanelView.this);