content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2009, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library 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 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library 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 this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
   * in the United States and other countries.]
   *
   * -------------------
   * ChartSelection.java
   * -------------------
   * (C) Copyright 2009, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 08-Apr-2009 : Version 1, with inspiration from patch 1460845 (DG);
   *
   */
  
  package org.jfree.chart;
  
  import java.awt.datatransfer.DataFlavor;
  import java.awt.datatransfer.Transferable;
  import java.awt.datatransfer.UnsupportedFlavorException;
  import java.io.IOException;
  
  /**
   * A class used to represent a chart on the clipboard.
   *
   * @since 1.0.13
   */
  public class ChartTransferable implements Transferable {
  
      /** The data flavor. */
      final DataFlavor imageFlavor = new DataFlavor(
              "image/x-java-image; class=java.awt.Image", "Image");    
      
      /** The chart. */
      private JFreeChart chart;
  
      /** The width of the chart on the clipboard. */
      private int width;
  
      /** The height of the chart on the clipboard. */
      private int height;
  
      /**
       * Creates a new chart selection.
       *
       * @param chart  the chart.
       * @param width  the chart width.
       * @param height  the chart height.
       */
      public ChartTransferable(JFreeChart chart, int width, int height) {
          this(chart, width, height, true);
      }
  
      /**
       * Creates a new chart selection.
       *
       * @param chart  the chart.
       * @param width  the chart width.
       * @param height  the chart height.
       * @param cloneData  clone the dataset(s)?
       */
      public ChartTransferable(JFreeChart chart, int width, int height,
              boolean cloneData) {
  
          // we clone the chart because presumably there can be some delay
          // between putting this instance on the system clipboard and
          // actually having the getTransferData() method called...
          try {
              this.chart = (JFreeChart) chart.clone();
          }
          catch (CloneNotSupportedException e) {
              this.chart = chart;
          }
          this.width = width;
          this.height = height;
          // FIXME: we've cloned the chart, but the dataset(s) aren't cloned
          // and we should do that
      }
  
      /**
       * Returns the data flavors supported.
       * 
       * @return The data flavors supported.
       */
      public DataFlavor[] getTransferDataFlavors() {
          return new DataFlavor[] {this.imageFlavor};
      }
  
      /**
       * Returns <code>true</code> if the specified flavor is supported.
       *
       * @param flavor  the flavor.
       *
       * @return A boolean.
       */
      public boolean isDataFlavorSupported(DataFlavor flavor) {
          return this.imageFlavor.equals(flavor);
      }
  
      /**
       * Returns the content for the requested flavor, if it is supported.
       *
       * @param flavor  the requested flavor.
       *
       * @return The content.
       *
       * @throws java.awt.datatransfer.UnsupportedFlavorException
       * @throws java.io.IOException
       */
      public Object getTransferData(DataFlavor flavor)
              throws UnsupportedFlavorException, IOException {
          
          if (this.imageFlavor.equals(flavor)) {
              return this.chart.createBufferedImage(width, height);
          }
          else {
              throw new UnsupportedFlavorException(flavor);
          }
      }
  
  }
  