/**
* 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.plotter.charts;
import java.awt.Color;
import java.awt.Paint;
import org.jfree.chart.renderer.category.BarRenderer;
import com.rapidminer.gui.plotter.ColorProvider;
import com.rapidminer.tools.math.MathFunctions;
/**
* Paints the bars in colorized RapidMiner style.
*
* @author Ingo Mierswa
*/
public class ColorizedBarRenderer extends BarRenderer {
private static final long serialVersionUID = 5262078816286731693L;
private double[] colorValues;
private double minColor;
private double maxColor;
private ColorProvider colorProvider = new ColorProvider(true);
public ColorizedBarRenderer(double[] colorValues) {
this.colorValues = colorValues;
this.minColor = Double.POSITIVE_INFINITY;
this.maxColor = Double.NEGATIVE_INFINITY;
if (this.colorValues != null) {
for (double d : this.colorValues) {
this.minColor = MathFunctions.robustMin(this.minColor, d);
this.maxColor = MathFunctions.robustMax(this.maxColor, d);
}
}
}
@Override
public Paint getItemPaint(int series, int item) {
if (colorValues == null || colorValues.length <= item || minColor == maxColor) {
return Color.RED;
} else {
double normalized = (colorValues[item] - minColor) / (maxColor - minColor);
return colorProvider.getPointColor(normalized);
}
}
}