1 files changed, 0 insertions, 215 deletions
diff --git a/core/java/android/view/VelocityTracker.java b/core/java/android/view/VelocityTracker.java
deleted file mode 100644
index c80167e..0000000
--- a/core/java/android/view/VelocityTracker.java
+++ /dev/null
@@ -1,215 +0,0 @@
-/*
- * Copyright (C) 2006 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.view;
-
-import android.util.Config;
-import android.util.Log;
-
-/**
- * Helper for tracking the velocity of touch events, for implementing
- * flinging and other such gestures.  Use {@link #obtain} to retrieve a
- * new instance of the class when you are going to begin tracking, put
- * the motion events you receive into it with {@link #addMovement(MotionEvent)},
- * and when you want to determine the velocity call
- * {@link #computeCurrentVelocity(int)} and then {@link #getXVelocity()}
- * and {@link #getXVelocity()}.
- */
-public final class VelocityTracker {
-    static final String TAG = "VelocityTracker";
-    static final boolean DEBUG = false;
-    static final boolean localLOGV = DEBUG || Config.LOGV;
-    
-    static final int NUM_PAST = 10;
-    static final int LONGEST_PAST_TIME = 200;
-    
-    static final VelocityTracker[] mPool = new VelocityTracker[1];
-    
-    final float mPastX[] = new float[NUM_PAST];
-    final float mPastY[] = new float[NUM_PAST];
-    final long mPastTime[] = new long[NUM_PAST];
-   
-    float mYVelocity;
-    float mXVelocity;
-    
-    /**
-     * Retrieve a new VelocityTracker object to watch the velocity of a
-     * motion.  Be sure to call {@link #recycle} when done.  You should
-     * generally only maintain an active object while tracking a movement,
-     * so that the VelocityTracker can be re-used elsewhere.
-     * 
-     * @return Returns a new VelocityTracker.
-     */
-    static public VelocityTracker obtain() {
-        synchronized (mPool) {
-            VelocityTracker vt = mPool[0];
-            if (vt != null) {
-                vt.clear();
-                return vt;
-            }
-            return new VelocityTracker();
-        }
-    }
-    
-    /**
-     * Return a VelocityTracker object back to be re-used by others.  You must
-     * not touch the object after calling this function.
-     */
-    public void recycle() {
-        synchronized (mPool) {
-            mPool[0] = this;
-        }
-    }
-    
-    private VelocityTracker() {
-    }
-    
-    /**
-     * Reset the velocity tracker back to its initial state.
-     */
-    public void clear() {
-        mPastTime[0] = 0;
-    }
-    
-    /**
-     * Add a user's movement to the tracker.  You should call this for the
-     * initial {@link MotionEvent#ACTION_DOWN}, the following
-     * {@link MotionEvent#ACTION_MOVE} events that you receive, and the
-     * final {@link MotionEvent#ACTION_UP}.  You can, however, call this
-     * for whichever events you desire.
-     * 
-     * @param ev The MotionEvent you received and would like to track.
-     */
-    public void addMovement(MotionEvent ev) {
-        long time = ev.getEventTime();
-        final int N = ev.getHistorySize();
-        for (int i=0; i<N; i++) {
-            addPoint(ev.getHistoricalX(i), ev.getHistoricalY(i),
-                    ev.getHistoricalEventTime(i));
-        }
-        addPoint(ev.getX(), ev.getY(), time);
-    }
-
-    private void addPoint(float x, float y, long time) {
-        int drop = -1;
-        int i;
-        if (localLOGV) Log.v(TAG, "Adding past y=" + y + " time=" + time);
-        final long[] pastTime = mPastTime;
-        for (i=0; i<NUM_PAST; i++) {
-            if (pastTime[i] == 0) {
-                break;
-            } else if (pastTime[i] < time-LONGEST_PAST_TIME) {
-                if (localLOGV) Log.v(TAG, "Dropping past too old at "
-                        + i + " time=" + pastTime[i]);
-                drop = i;
-            }
-        }
-        if (localLOGV) Log.v(TAG, "Add index: " + i);
-        if (i == NUM_PAST && drop < 0) {
-            drop = 0;
-        }
-        if (drop == i) drop--;
-        final float[] pastX = mPastX;
-        final float[] pastY = mPastY;
-        if (drop >= 0) {
-            if (localLOGV) Log.v(TAG, "Dropping up to #" + drop);
-            final int start = drop+1;
-            final int count = NUM_PAST-drop-1;
-            System.arraycopy(pastX, start, pastX, 0, count);
-            System.arraycopy(pastY, start, pastY, 0, count);
-            System.arraycopy(pastTime, start, pastTime, 0, count);
-            i -= (drop+1);
-        }
-        pastX[i] = x;
-        pastY[i] = y;
-        pastTime[i] = time;
-        i++;
-        if (i < NUM_PAST) {
-            pastTime[i] = 0;
-        }
-    }
-    
-    /**
-     * Compute the current velocity based on the points that have been
-     * collected.  Only call this when you actually want to retrieve velocity
-     * information, as it is relatively expensive.  You can then retrieve
-     * the velocity with {@link #getXVelocity()} and
-     * {@link #getYVelocity()}.
-     * 
-     * @param units The units you would like the velocity in.  A value of 1
-     * provides pixels per millisecond, 1000 provides pixels per second, etc.
-     */
-    public void computeCurrentVelocity(int units) {
-        final float[] pastX = mPastX;
-        final float[] pastY = mPastY;
-        final long[] pastTime = mPastTime;
-        
-        // Kind-of stupid.
-        final float oldestX = pastX[0];
-        final float oldestY = pastY[0];
-        final long oldestTime = pastTime[0];
-        float accumX = 0;
-        float accumY = 0;
-        int N=0;
-        while (N < NUM_PAST) {
-            if (pastTime[N] == 0) {
-                break;
-            }
-            N++;
-        }
-        // Skip the last received event, since it is probably pretty noisy.
-        if (N > 3) N--;
-        
-        for (int i=1; i < N; i++) {
-            final int dur = (int)(pastTime[i] - oldestTime);
-            if (dur == 0) continue;
-            float dist = pastX[i] - oldestX;
-            float vel = (dist/dur) * units;   // pixels/frame.
-            if (accumX == 0) accumX = vel;
-            else accumX = (accumX + vel) * .5f;
-            
-            dist = pastY[i] - oldestY;
-            vel = (dist/dur) * units;   // pixels/frame.
-            if (accumY == 0) accumY = vel;
-            else accumY = (accumY + vel) * .5f;
-        }
-        mXVelocity = accumX;
-        mYVelocity = accumY;
-        
-        if (localLOGV) Log.v(TAG, "Y velocity=" + mYVelocity +" X velocity="
-                + mXVelocity + " N=" + N);
-    }
-    
-    /**
-     * Retrieve the last computed X velocity.  You must first call
-     * {@link #computeCurrentVelocity(int)} before calling this function.
-     * 
-     * @return The previously computed X velocity.
-     */
-    public float getXVelocity() {
-        return mXVelocity;
-    }
-    
-    /**
-     * Retrieve the last computed Y velocity.  You must first call
-     * {@link #computeCurrentVelocity(int)} before calling this function.
-     * 
-     * @return The previously computed Y velocity.
-     */
-    public float getYVelocity() {
-        return mYVelocity;
-    }
-}