1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License
15 */
16
17package com.android.incallui.answer.impl.classifier;
18
19import java.util.ArrayList;
20
21/**
22 * Contains data about a stroke (a single trace, all the events from a given id from the
23 * DOWN/POINTER_DOWN event till the UP/POINTER_UP/CANCEL event.)
24 */
25class Stroke {
26
27  private static final float NANOS_TO_SECONDS = 1e9f;
28
29  private ArrayList<Point> mPoints = new ArrayList<>();
30  private long mStartTimeNano;
31  private long mEndTimeNano;
32  private float mLength;
33  private final float mDpi;
34
35  public Stroke(long eventTimeNano, float dpi) {
36    mDpi = dpi;
37    mStartTimeNano = mEndTimeNano = eventTimeNano;
38  }
39
40  public void addPoint(float x, float y, long eventTimeNano) {
41    mEndTimeNano = eventTimeNano;
42    Point point = new Point(x / mDpi, y / mDpi, eventTimeNano - mStartTimeNano);
43    if (!mPoints.isEmpty()) {
44      mLength += mPoints.get(mPoints.size() - 1).dist(point);
45    }
46    mPoints.add(point);
47  }
48
49  public int getCount() {
50    return mPoints.size();
51  }
52
53  public float getTotalLength() {
54    return mLength;
55  }
56
57  public float getEndPointLength() {
58    return mPoints.get(0).dist(mPoints.get(mPoints.size() - 1));
59  }
60
61  public long getDurationNanos() {
62    return mEndTimeNano - mStartTimeNano;
63  }
64
65  public float getDurationSeconds() {
66    return (float) getDurationNanos() / NANOS_TO_SECONDS;
67  }
68
69  public ArrayList<Point> getPoints() {
70    return mPoints;
71  }
72}
73