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/* ===================================================
 * JFreeSVG : an SVG library for the Java(tm) platform
 * ===================================================
 * 
 * (C)opyright 2013, 2014, 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 .
 * 
 * [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
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 */

package org.jfree.graphics2d.demo;

import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Rectangle;
import java.io.File;
import java.io.IOException;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.StatisticalBarRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.statistics.DefaultStatisticalCategoryDataset;
import org.jfree.graphics2d.canvas.CanvasGraphics2D;
import org.jfree.graphics2d.canvas.CanvasUtils;
import org.jfree.ui.TextAnchor;

/**
 * A demo using {@link CanvasGraphics2D} and JFreeChart to write a bar chart 
 * to an HTML file where a Javascript function draws the chart on an
 * HTML5 canvas.
 */
public class CanvasBarChartDemo1 {
    
    /**
     * Creates a sample dataset.
     *
     * @return The dataset.
     */
    private static CategoryDataset createDataset() {
        DefaultStatisticalCategoryDataset dataset
            = new DefaultStatisticalCategoryDataset();
        dataset.add(10.0, 2.4, "Row 1", "Column 1");
        dataset.add(15.0, 4.4, "Row 1", "Column 2");
        dataset.add(13.0, 2.1, "Row 1", "Column 3");
        dataset.add(7.0, 1.3, "Row 1", "Column 4");
        dataset.add(22.0, 2.4, "Row 2", "Column 1");
        dataset.add(18.0, 4.4, "Row 2", "Column 2");
        dataset.add(28.0, 2.1, "Row 2", "Column 3");
        dataset.add(17.0, 1.3, "Row 2", "Column 4");
        return dataset;
    }

    /**
     * Creates a sample chart.
     *
     * @param dataset  a dataset.
     *
     * @return The chart.
     */
    private static JFreeChart createChart(CategoryDataset dataset) {

        // create the chart...
        JFreeChart chart = ChartFactory.createLineChart(
            "Statistical Bar Chart Demo 1", // chart title
            "Type",                         // domain axis label
            "Value",                        // range axis label
            dataset,                        // data
            PlotOrientation.VERTICAL,       // orientation
            true,                           // include legend
            true,                           // tooltips
            false                           // urls
        );


        CategoryPlot plot = (CategoryPlot) chart.getPlot();

        // customise the range axis...
        NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
        rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        rangeAxis.setAutoRangeIncludesZero(false);

        // customise the renderer...
        StatisticalBarRenderer renderer = new StatisticalBarRenderer();
        renderer.setDrawBarOutline(false);
        renderer.setErrorIndicatorPaint(Color.black);
        renderer.setIncludeBaseInRange(false);
        plot.setRenderer(renderer);

        // ensure the current theme is applied to the renderer just added
        ChartUtilities.applyCurrentTheme(chart);

        renderer.setBaseItemLabelGenerator(
                new StandardCategoryItemLabelGenerator());
        renderer.setBaseItemLabelsVisible(true);
        renderer.setBaseItemLabelPaint(Color.yellow);
        renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(
                ItemLabelAnchor.INSIDE6, TextAnchor.BOTTOM_CENTER));

        // set up gradient paints for series...
        GradientPaint gp0 = new GradientPaint(0.0f, 0.0f, Color.blue,
                0.0f, 0.0f, new Color(0, 0, 64));
        GradientPaint gp1 = new GradientPaint(0.0f, 0.0f, Color.green,
                0.0f, 0.0f, new Color(0, 64, 0));
        renderer.setSeriesPaint(0, gp0);
        renderer.setSeriesPaint(1, gp1);
        return chart;
    }

    /**
     * Starting point for the demo.
     * 
     * @param args  ignored.
     * 
     * @throws IOException 
     */
    public static void main(String[] args) throws IOException {
        JFreeChart chart = createChart(createDataset());
        CanvasGraphics2D g2 = new CanvasGraphics2D("id");
        int width = 600;
        int height = 400;
        Rectangle r = new Rectangle(0, 0, width, height);
        chart.draw(g2, r);
        File f = new File("CanvasBarChartDemo1.html");
        CanvasUtils.writeToHTML(f, "CanvasBarChartDemo1", g2.getCanvasID(), 
               width, height, g2.getScript());
    }
}