| /* |
| * Copyright (C) 2015 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.classifier; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * Contains data about a stroke (a single trace, all the events from a given id from the |
| * DOWN/POINTER_DOWN event till the UP/POINTER_UP/CANCEL event.) |
| */ |
| public class Stroke { |
| private final float NANOS_TO_SECONDS = 1e9f; |
| |
| private ArrayList<Point> mPoints = new ArrayList<>(); |
| private long mStartTimeNano; |
| private long mEndTimeNano; |
| private float mLength; |
| private final float mDpi; |
| |
| public Stroke(long eventTimeNano, float dpi) { |
| mDpi = dpi; |
| mStartTimeNano = mEndTimeNano = eventTimeNano; |
| } |
| |
| public void addPoint(float x, float y, long eventTimeNano) { |
| mEndTimeNano = eventTimeNano; |
| Point point = new Point(x / mDpi, y / mDpi, eventTimeNano - mStartTimeNano); |
| if (!mPoints.isEmpty()) { |
| mLength += mPoints.get(mPoints.size() - 1).dist(point); |
| } |
| mPoints.add(point); |
| } |
| |
| public int getCount() { |
| return mPoints.size(); |
| } |
| |
| public float getTotalLength() { |
| return mLength; |
| } |
| |
| public float getEndPointLength() { |
| return mPoints.get(0).dist(mPoints.get(mPoints.size() - 1)); |
| } |
| |
| public long getDurationNanos() { |
| return mEndTimeNano - mStartTimeNano; |
| } |
| |
| public float getDurationSeconds() { |
| return (float) getDurationNanos() / NANOS_TO_SECONDS; |
| } |
| |
| public ArrayList<Point> getPoints() { |
| return mPoints; |
| } |
| } |