net.sqs2.omr.result.chart.BarChart.java Source code

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Here is the source code for net.sqs2.omr.result.chart.BarChart.java

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/*
    
 BarChart.java
     
 Copyright 2004-2007 KUBO Hiroya (hiroya@cuc.ac.jp).
     
 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.
     
 Created on 2005/02/26
    
 */

package net.sqs2.omr.result.chart;

import java.io.IOException;
import java.io.OutputStream;

import net.sqs2.omr.master.FormArea;
import net.sqs2.omr.result.builder.StatisticsResult;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;

public class BarChart {
    public static void write(OutputStream outputStream, int width, int height, Legend legend,
            StatisticsResult statisticsResult) {
        // (1)create dataset
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        for (FormArea formArea : legend.formAreaList) {
            int itemIndex = formArea.getItemIndex();
            String key = legend.questionIndex + "," + itemIndex;
            dataset.addValue(statisticsResult.getCount(key), "", formArea.getItemLabel());
        }

        if (legend.primaryFormArea.isSelectSingle()) {
            int count = statisticsResult.getCount(legend.questionIndex + ",-1");
            dataset.addValue(count, "", ChartConstants.NO_ANSWER);
        }

        // String title = StringUtil.join(formAreaList.get(0).getHints(), "\n");
        String title = "";
        JFreeChart chart = ChartFactory.createBarChart(title, "", ChartConstants.NO_ANSWER, dataset,
                PlotOrientation.HORIZONTAL, false, true, false);
        try {
            ChartUtilities.writeChartAsPNG(outputStream, chart, width, height);
        } catch (IOException ioEx) {
            ioEx.printStackTrace();
        }
    }
}