/* ===================================================
 * JFreeSVG : an SVG library for the Java(tm) platform
 * ===================================================
 * 
 * (C)opyright 2013-2015, by Object Refinery Limited.  All rights reserved.
 *
 * Project Info:  http://www.jfree.org/jfreesvg/index.html
 * 
 * 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/>.
 * 
 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
 * Other names may be trademarks of their respective owners.]
 * 
 * If you do not wish to be bound by the terms of the AGPL, an alternative
 * commercial license can be purchased.  For details, please see visit the
 * JFreeSVG home page:
 * 
 * http://www.jfree.org/jfreesvg
 */

package org.jfree.graphics2d.demo;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.RadialGradientPaint;
import java.awt.Rectangle;
import java.awt.geom.Point2D;
import java.io.File;
import java.io.IOException;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.drawable.GradientPainter;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.title.TextTitle;
import org.jfree.chart.ui.HorizontalAlignment;
import org.jfree.chart.ui.RectangleAnchor;
import org.jfree.chart.ui.RectangleEdge;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.jfree.graphics2d.svg.SVGGraphics2D;
import org.jfree.graphics2d.svg.SVGUtils;

/**
 * A demo/test for a pie chart.
 */
public class SVGPieChartDemo1 {
    
    static {
        // set a theme using the new shadow generator feature available in
        // 1.0.14 - for backwards compatibility it is not enabled by default
        ChartFactory.setChartTheme(new StandardChartTheme("JFree/Shadow",
                true));
    }
    
    /**
     * Creates a sample dataset.
     * 
     * Source: http://www.bbc.co.uk/news/business-15489523
     *
     * @return A sample dataset.
     */
    private static PieDataset createDataset() {
        DefaultPieDataset dataset = new DefaultPieDataset();
        dataset.setValue("Samsung", new Double(27.8));
        dataset.setValue("Others", new Double(55.3));
        dataset.setValue("Nokia", new Double(16.8));
        dataset.setValue("Apple", new Double(17.1));
        return dataset;
    }

    /**
     * Creates a chart.
     *
     * @param dataset  the dataset.
     *
     * @return A chart.
     */
    private static JFreeChart createChart(PieDataset dataset) {

        JFreeChart chart = ChartFactory.createPieChart(
            "Smart Phones Manufactured / Q3 2011",  // chart title
            dataset);
        chart.removeLegend();

        // set a custom background for the chart
        chart.setBackgroundPainter(new GradientPainter(new Color(20, 20, 20), 
                RectangleAnchor.TOP_LEFT, Color.DARK_GRAY, 
                RectangleAnchor.BOTTOM_RIGHT));

        // customise the title position and font
        TextTitle t = chart.getTitle();
        t.setHorizontalAlignment(HorizontalAlignment.LEFT);
        t.setPaint(new Color(240, 240, 240));
        t.setFont(new Font("Arial", Font.BOLD, 26));

        PiePlot plot = (PiePlot) chart.getPlot();
        plot.setBackgroundPainter(null);
        plot.setInteriorGap(0.04);
        plot.setBorderPainter(null);

        // use gradients and white borders for the section colours
        plot.setSectionPaint("Others", createGradientPaint(new Color(200, 200, 255), Color.BLUE));
        plot.setSectionPaint("Samsung", createGradientPaint(new Color(255, 200, 200), Color.RED));
        plot.setSectionPaint("Apple", createGradientPaint(new Color(200, 255, 200), Color.GREEN));
        plot.setSectionPaint("Nokia", createGradientPaint(new Color(200, 255, 200), Color.YELLOW));
        plot.setBaseSectionOutlinePaint(Color.WHITE);
        plot.setSectionOutlinesVisible(true);
        plot.setBaseSectionOutlineStroke(new BasicStroke(2.0f));

        // customise the section label appearance
        plot.setLabelFont(new Font("Courier New", Font.BOLD, 20));
        plot.setLabelLinkPaint(Color.WHITE);
        plot.setLabelLinkStroke(new BasicStroke(2.0f));
        plot.setLabelOutlineStroke(null);
        plot.setLabelPaint(Color.WHITE);
        plot.setLabelBackgroundPaint(null);
        // add a subtitle giving the data source
        TextTitle source = new TextTitle("Source: http://www.bbc.co.uk/news/business-15489523", 
                new Font("Courier New", Font.PLAIN, 12));
        source.setPaint(Color.WHITE);
        source.setPosition(RectangleEdge.BOTTOM);
        source.setHorizontalAlignment(HorizontalAlignment.RIGHT);
        chart.addSubtitle(source);
        return chart;

    }

    /**
     * A utility method for creating gradient paints.
     * 
     * @param c1  color 1.
     * @param c2  color 2.
     * 
     * @return A radial gradient paint.
     */
    private static RadialGradientPaint createGradientPaint(Color c1, Color c2) {
        Point2D center = new Point2D.Float(0, 0);
        float radius = 200;
        float[] dist = {0.0f, 1.0f};
        return new RadialGradientPaint(center, radius, dist,
                new Color[] {c1, c2});
    }

    /**
     * Starting point for the demo.
     * 
     * @param args  ignored.
     * 
     * @throws IOException 
     */
    public static void main(String[] args) throws IOException {
        JFreeChart chart = createChart(createDataset());
        SVGGraphics2D g2 = new SVGGraphics2D(600, 400);
        g2.setRenderingHint(JFreeChart.KEY_SUPPRESS_SHADOW_GENERATION, true);
        Rectangle r = new Rectangle(0, 0, 600, 400);
        chart.draw(g2, r);
        File f = new File("SVGPieChartDemo1.svg");
        SVGUtils.writeToSVG(f, g2.getSVGElement());
    }
}
