com.actionbarsherlock.internal.nineoldandroids.animation.IntEvaluator Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of sample Show documentation
Show all versions of sample Show documentation
Android library for better number/date/time-picker DialogFragments.
/*
* Copyright (C) 2010 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.actionbarsherlock.internal.nineoldandroids.animation;
/**
* This evaluator can be used to perform type interpolation between int values.
*/
public class IntEvaluator implements TypeEvaluator {
/**
* This function returns the result of linearly interpolating the start and end values, with
* fraction representing the proportion between the start and end values. The
* calculation is a simple parametric calculation: result = x0 + t * (v1 - v0),
* where x0 is startValue, x1 is endValue,
* and t is fraction.
*
* @param fraction The fraction from the starting to the ending values
* @param startValue The start value; should be of type int or
* Integer
* @param endValue The end value; should be of type int or Integer
* @return A linear interpolation between the start and end values, given the
* fraction parameter.
*/
public Integer evaluate(float fraction, Integer startValue, Integer endValue) {
int startInt = startValue;
return (int)(startInt + fraction * (endValue - startInt));
}
}