zw.co.hitrac.tpg.web.chart.GeneralChart.java Source code

Introduction

Here is the source code for zw.co.hitrac.tpg.web.chart.GeneralChart.java

Source

package zw.co.hitrac.tpg.web.chart;

import org.apache.wicket.markup.html.image.NonCachingImage;
import org.apache.wicket.request.resource.DynamicImageResource;
import org.apache.wicket.request.resource.IResource;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.data.general.DefaultPieDataset;

/*
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/**
 *
 * @author pchikumba
 */
public class GeneralChart extends NonCachingImage {

    private final int width;
    private final int height;

    public GeneralChart(String id, int width, int height) {
        super(id);
        this.width = width;
        this.height = height;
    }

    @Override
    protected IResource getImageResource() {
        return new DynamicImageResource() {

            @Override
            protected byte[] getImageData(IResource.Attributes atrbts) {
                JFreeChart chart = createData();
                return toImageData(chart.createBufferedImage(width, height));

            }
        };
    }

    private JFreeChart createData() {
        DefaultPieDataset dataset = new DefaultPieDataset();
        dataset.setValue("Maths", 20);
        dataset.setValue("Content", 15);
        dataset.setValue("English", 10);
        dataset.setValue("Shona", 18);
        return ChartFactory.createPieChart("Performance", dataset, true, true, true);
    }

}