com.rapidminer.gui.plotter.charts.ColorizedBarRenderer.java Source code

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Here is the source code for com.rapidminer.gui.plotter.charts.ColorizedBarRenderer.java

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/**
 * Copyright (C) 2001-2015 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);
        }
    }
}