/*
* 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;
/**
* A classifier which looks at the ratio between the total length covered by the stroke and the
* distance between the first and last point from this stroke.
*/
public class EndPointRatioClassifier extends StrokeClassifier {
public EndPointRatioClassifier(ClassifierData classifierData) {
mClassifierData = classifierData;
}
@Override
public String getTag() {
return "END_RTIO";
}
@Override
public float getFalseTouchEvaluation(int type, Stroke stroke) {
float ratio;
if (stroke.getTotalLength() == 0.0f) {
ratio = 1.0f;
} else {
ratio = stroke.getEndPointLength() / stroke.getTotalLength();
}
return EndPointRatioEvaluator.evaluate(ratio);
}
}