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 
17 package com.android.incallui.answer.impl.classifier;
18 
19 /**
20  * A classifier that looks at the speed of the stroke. It calculates the speed of a stroke in inches
21  * per second.
22  */
23 class SpeedClassifier extends StrokeClassifier {
24 
SpeedClassifier(ClassifierData classifierData)25   public SpeedClassifier(ClassifierData classifierData) {}
26 
27   @Override
getTag()28   public String getTag() {
29     return "SPD";
30   }
31 
32   @Override
getFalseTouchEvaluation(Stroke stroke)33   public float getFalseTouchEvaluation(Stroke stroke) {
34     float duration = stroke.getDurationSeconds();
35     if (duration == 0.0f) {
36       return SpeedEvaluator.evaluate(0.0f);
37     }
38     return SpeedEvaluator.evaluate(stroke.getTotalLength() / duration);
39   }
40 }
41