/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.com
*
* This program is free software: you can redistribute it and/or modify it under the terms of the
* GNU Affero General Public License as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License along with this program.
* If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.gui.new_plotter.utility;
/**
* @author Marius Helf
*
*/
public class ContinuousSizeProvider implements SizeProvider {
private boolean logarithmic;
private double maxScalingFactor;
private double minScalingFactor;
private double minValue;
private double maxValue;
public ContinuousSizeProvider(double minValue, double maxValue, double minSize, double maxSize, boolean logarithmic) {
// sanity checks
if (minValue > maxValue) {
throw new IllegalArgumentException("minValue > maxValue not allowed");
}
if (logarithmic && minValue <= 0) {
throw new IllegalArgumentException("minValue <= 0 not allowed for logarithmic");
}
this.minValue = minValue;
this.maxValue = maxValue;
// this.minScalingFactor = minSize;
// this.maxScalingFactor = maxSize;
this.minScalingFactor = minSize * minSize;
this.maxScalingFactor = maxSize * maxSize;
this.logarithmic = logarithmic;
}
@Override
public double getScalingFactorForValue(double value) {
if (Double.isNaN(value) || Double.isInfinite(value)) {
return Double.NaN;
}
// map value to [0,1]
double fraction;
if (minValue == maxValue) {
fraction = 0.5;
} else {
if (logarithmic) {
fraction = (Math.log(value) - Math.log(minValue)) / (Math.log(maxValue) - Math.log(minValue));
} else {
fraction = (value - minValue) / (maxValue - minValue);
}
}
// return minScalingFactor + (maxScalingFactor-minScalingFactor)*fraction;
return Math.sqrt(minScalingFactor + (maxScalingFactor - minScalingFactor) * fraction);
}
@Override
public boolean supportsCategoricalValues() {
return false;
}
@Override
public boolean supportsNumericalValues() {
return true;
}
@Override
public SizeProvider clone() {
return new ContinuousSizeProvider(minValue, maxValue, minScalingFactor, maxScalingFactor, logarithmic);
}
@Override
public double getMinScalingFactor() {
return minScalingFactor;
}
@Override
public double getMaxScalingFactor() {
return maxScalingFactor;
}
}