HistogramChart.java

/*
 * Copyright (c) 2012 Patrick Meyer
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.itemanalysis.jmetrik.graph.histogram;

import org.jfree.chart.ChartTheme;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.labels.StandardXYToolTipGenerator;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYBarRenderer;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.urls.StandardXYURLGenerator;
import org.jfree.data.xy.IntervalXYDataset;

public class HistogramChart {

    private static ChartTheme currentTheme = new StandardChartTheme("JFree");

    public HistogramChart(){

    }

    public static JFreeChart createHistogram(String title,
                                             String xAxisLabel,
                                             String yAxisLabel,
                                             IntervalXYDataset dataset,
                                             PlotOrientation orientation,
                                             boolean legend,
                                             boolean tooltips,
                                             boolean urls){

        if(orientation == null){
            throw new IllegalArgumentException("Null 'orientation' argument.");
        }
        NumberAxis xAxis = new NumberAxis(xAxisLabel);
        xAxis.setAutoRangeIncludesZero(false);
        ValueAxis yAxis = new NumberAxis(yAxisLabel);

        XYItemRenderer renderer = new XYBarRenderer();
        if(tooltips){
            renderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator());
        }
        if(urls){
            renderer.setURLGenerator(new StandardXYURLGenerator());
        }

        XYPlot plot = new XYPlot(dataset, xAxis, yAxis, renderer);
        plot.setOrientation(orientation);
        JFreeChart chart = new JFreeChart(title, JFreeChart.DEFAULT_TITLE_FONT, plot, legend);
        currentTheme.apply(chart);
        return chart;
    }

}