package net.sf.statcvs.charts;

 import java.awt.Color;

 import java.awt.Dimension;

 import java.io.File;

 import java.io.IOException;

 import java.util.logging.Logger;

 import org.jfree.chart.ChartUtilities;

 import org.jfree.chart.JFreeChart;

 /**

  * An image file for a chart.

  * 

  * TODO: Better integrate all charts with ReportConfig 

  * @author jentzsch

  * @author Richard Cyganiak (richard@cyganiak.de)

  * @version $Id: ChartImage.java,v 1.6 2008/04/02 11:22:15 benoitx Exp $

  */

 public class ChartImage {

     private final static Logger logger = Logger.getLogger("sf.net.statcvs");

     private final static Color BACKGROUND_COLOR = new Color(204, 204, 187);

     private final String rootDirectory;

     private JFreeChart chart;

     private final String fileName;

     private final Dimension size;

     private final String title;

     private boolean written = false;

     /**

      * Creates a new ChartFile.

      * @param rootDirectory The report root directory with trailing slash

      * @param fileName The relative file name for the chart, with .png extension

      * @param title The chart's title

      * @param chart The JFreeChart object to save as a file

      * @param size width and height of the chart in pixels

      */

     public ChartImage(final String rootDirectory, final String fileName, final String title, final JFreeChart chart, final Dimension size) {

         this.rootDirectory = rootDirectory;

         this.fileName = fileName;

         this.title = title;

         this.chart = chart;

         this.size = size;

         chart.setBackgroundPaint(BACKGROUND_COLOR);

     }

     /**

      * Writes the chart to disk as a PNG file.

      */

     public void write() {

         if (this.written) {

             return;

         }

         logger.info("writing chart '" + this.title + "' to " + this.fileName);

         try {

             ChartUtilities.saveChartAsPNG(new File(rootDirectory + fileName), chart, size.width, size.height);

         } catch (final IOException e) {

             logger.warning("could not write chart '" + fileName + "': " + e);

         }

         this.written = true;

         this.chart = null; // Free memory? Not sure if this has any effect ... 

     }

     /**

      * Returns the chart's URL, relative to the report root.

      */

     public String getURL() {

         return this.fileName;

     }

     /**

      * Returns the chart's title.

      */

     public String getFullTitle() {

         return this.title;

     }

     /**

      * Returns the chart's width in pixels.

      */

     public int getWidth() {

         return this.size.width;

     }

     /**

      * Returns the chart's height in pixels.

      */

     public int getHeight() {

         return this.size.height;

     }

 }