org.getobjects.samples.HelloChart.Main.java Source code

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Here is the source code for org.getobjects.samples.HelloChart.Main.java

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/*
  Copyright (C) 2007 Helge Hess
    
  This file is part of Go.
    
  Go is free software; you can redistribute it and/or modify it under
  the terms of the GNU Lesser General Public License as published by the
  Free Software Foundation; either version 2, or (at your option) any
  later version.
    
  Go 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 Lesser General Public
  License for more details.
    
  You should have received a copy of the GNU Lesser General Public
  License along with Go; see the file COPYING.  If not, write to the
  Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.
*/
package org.getobjects.samples.HelloChart;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.awt.Paint;

import org.getobjects.appserver.core.WOComponent;
import org.getobjects.foundation.UObject;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.plot.Plot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;

/**
 * Main is the 'default' component of a regular Go application. This is what
 * you get if you enter the root /App URL.
 */
public class Main extends WOComponent {

    public PieDataset getPieDataset() {
        // also: DefaultCategoryDataset
        DefaultPieDataset dataset = new DefaultPieDataset(); // key=>value

        /* key/value */
        dataset.setValue("Services", 55.7);
        dataset.setValue("Products", 15.3);
        dataset.setValue("Subscriptions", 29.0);
        return dataset;
    }

    public CategoryDataset getCatDataSet() {
        // thats like a DB table, a matrix of keys/values
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();

        dataset.addValue(15000.0, "January", "revenue");
        dataset.addValue(25000.0, "February", "revenue");
        dataset.addValue(60000.0, "March", "revenue");
        dataset.addValue(12000.0, "January", "profit");
        dataset.addValue(24000.0, "February", "profit");
        dataset.addValue(55000.0, "March", "profit");

        return dataset;
    }

    public CategoryDataset getRevCatDataSet() {
        // thats like a DB table, a matrix of keys/values
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();

        dataset.addValue(15000.0, "revenue", "January");
        dataset.addValue(12000.0, "profit", "January");
        dataset.addValue(25000.0, "revenue", "February");
        dataset.addValue(24000.0, "profit", "February");
        dataset.addValue(60000.0, "revenue", "March");
        dataset.addValue(55000.0, "profit", "March");

        return dataset;
    }

    /**
     * This defines the direct action which can be invoked using:<pre>
     *   /HelloThumbnail/wa/Main/chart?chs=128x128&chartType=p3</pre>
     * 
     * <p>
     * Note that the method returns a java.awt.BufferedImage. This will get
     * rendered to a GIF image by the GoDefaultRenderer.
     * (this method does not return a WOResponse, but it lets the Go machinery
     * deal with the image result object). 
     * 
     * @return a BufferedImage containing the scaled image
     */
    public Object chartAction() {
        Dimension size = UGoogleChart.getDimensions(F("chs", "128x128"), null);
        String chartType = (String) F("cht", "p");

        JFreeChart chart = null;
        if (chartType.equals("p")) {
            chart = ChartFactory.createPieChart((String) F("title", "Revenue Chart" /* default title */),
                    this.getPieDataset(), UObject.boolValue(F("legend", true)) /* show legend */,
                    UObject.boolValue(F("tooltips", true)) /* show tooltips */, false /* no URLs */);
        } else if (chartType.equals("p3")) {
            chart = ChartFactory.createPieChart3D((String) F("title", "Revenue Chart" /* default title */),
                    this.getPieDataset(), UObject.boolValue(F("legend", true)) /* show legend */,
                    UObject.boolValue(F("tooltips", true)) /* show tooltips */, false /* no URLs */);
        } else if (chartType.startsWith("b")) {
            // bhs, bvs (one bar with multiple values)
            // bhg, bvg (one bar for each row)

            PlotOrientation orientation = PlotOrientation.VERTICAL;
            if (chartType.startsWith("bh"))
                orientation = PlotOrientation.HORIZONTAL;

            if (chartType.endsWith("3")) {
                chart = ChartFactory.createBarChart3D((String) F("title", "Revenue Chart" /* default title */),
                        (String) F("xlabel", "X-Axis"), (String) F("ylabel", "Y-Axis"), getCatDataSet(),
                        orientation, UObject.boolValue(F("legend", true)) /* show legend */,
                        UObject.boolValue(F("tooltips", true)) /* show tooltips */, false /* no URLs */);
            } else {
                chart = ChartFactory.createBarChart((String) F("title", "Revenue Chart" /* default title */),
                        (String) F("xlabel", "X-Axis"), (String) F("ylabel", "Y-Axis"), getRevCatDataSet(),
                        orientation, UObject.boolValue(F("legend", true)) /* show legend */,
                        UObject.boolValue(F("tooltips", true)) /* show tooltips */, false /* no URLs */);
            }
        }

        /* style the chart */

        chart.setBorderVisible(true);
        //chart.setBorderPaint(new Paint(Color.blue));

        Paint p = new GradientPaint(0, 0, Color.white, 1000, 0, Color.blue);
        chart.setBackgroundPaint(p);

        /* style the plot */

        Plot plot = chart.getPlot();
        plot.setBackgroundPaint(new Color(240, 240, 250));

        /* add explosion for Pies */

        if (plot instanceof PiePlot) {
            PiePlot pplot = (PiePlot) chart.getPlot();
            pplot.setExplodePercent("Products", 0.30); // can be multiple explodes
        }

        /* create the image for HTTP delivery */

        return chart.createBufferedImage(size.width, size.height);
    }
}