| /* |
| * Copyright (C) 2014 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 com.android.systemui.statusbar.phone; |
| |
| import android.util.Pools; |
| import android.view.MotionEvent; |
| import android.view.VelocityTracker; |
| |
| /** |
| * An implementation of {@link VelocityTrackerInterface} using the platform-standard |
| * {@link VelocityTracker}. |
| */ |
| public class PlatformVelocityTracker implements VelocityTrackerInterface { |
| |
| private static final Pools.SynchronizedPool<PlatformVelocityTracker> sPool = |
| new Pools.SynchronizedPool<>(2); |
| |
| private VelocityTracker mTracker; |
| |
| public static PlatformVelocityTracker obtain() { |
| PlatformVelocityTracker tracker = sPool.acquire(); |
| if (tracker == null) { |
| tracker = new PlatformVelocityTracker(); |
| } |
| tracker.setTracker(VelocityTracker.obtain()); |
| return tracker; |
| } |
| |
| public void setTracker(VelocityTracker tracker) { |
| mTracker = tracker; |
| } |
| |
| @Override |
| public void addMovement(MotionEvent event) { |
| mTracker.addMovement(event); |
| } |
| |
| @Override |
| public void computeCurrentVelocity(int units) { |
| mTracker.computeCurrentVelocity(units); |
| } |
| |
| @Override |
| public float getXVelocity() { |
| return mTracker.getXVelocity(); |
| } |
| |
| @Override |
| public float getYVelocity() { |
| return mTracker.getYVelocity(); |
| } |
| |
| @Override |
| public void recycle() { |
| mTracker.recycle(); |
| sPool.release(this); |
| } |
| } |