text: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2008, 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.]
   *
   * ----------------------
   * XYImageAnnotation.java
   * ----------------------
   * (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   Mike Harris;
   *
   * Changes:
   * --------
   * 01-Dec-2003 : Version 1 (DG);
   * 21-Jan-2004 : Update for renamed method in ValueAxis (DG);
   * 18-May-2004 : Fixed bug with plot orientation (DG);
   * 29-Sep-2004 : Now extends AbstractXYAnnotation, with modified draw()
   *               method signature and updated equals() method (DG);
   * ------------- JFREECHART 1.0.x ---------------------------------------------
   * 01-Dec-2006 : Added anchor attribute (see patch 1584860 from
   *               Mike Harris) (DG);
   */
  
  package org.jfree.chart.annotations;
  
  import java.awt.Graphics2D;
  import java.awt.Image;
  import java.awt.geom.Point2D;
  import java.awt.geom.Rectangle2D;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.io.Serializable;
  
  import org.jfree.chart.axis.AxisLocation;
  import org.jfree.chart.axis.ValueAxis;
  import org.jfree.chart.plot.Plot;
  import org.jfree.chart.plot.PlotOrientation;
  import org.jfree.chart.plot.PlotRenderingInfo;
  import org.jfree.chart.plot.XYPlot;
  import org.jfree.ui.RectangleAnchor;
  import org.jfree.ui.RectangleEdge;
  import org.jfree.util.ObjectUtilities;
  import org.jfree.util.PublicCloneable;
  
  /**
   * An annotation that allows an image to be placed at some location on
   * an {@link XYPlot}.
   *
   * TODO:  implement serialization properly (image is not serializable).
   */
  public class XYImageAnnotation extends AbstractXYAnnotation
          implements Cloneable, PublicCloneable, Serializable {
  
      /** For serialization. */
      private static final long serialVersionUID = -4364694501921559958L;
  
      /** The x-coordinate (in data space). */
      private double x;
  
      /** The y-coordinate (in data space). */
      private double y;
  
      /** The image. */
      private transient Image image;
  
      /**
       * The image anchor point.
       *
       * @since 1.0.4
       */
      private RectangleAnchor anchor;
  
      /**
       * Creates a new annotation to be displayed at the specified (x, y)
       * location.
       *
       * @param x  the x-coordinate (in data space).
       * @param y  the y-coordinate (in data space).
       * @param image  the image (<code>null</code> not permitted).
       */
      public XYImageAnnotation(double x, double y, Image image) {
          this(x, y, image, RectangleAnchor.CENTER);
      }
  
      /**
       * Creates a new annotation to be displayed at the specified (x, y)
       * location.
       *
       * @param x  the x-coordinate (in data space).
       * @param y  the y-coordinate (in data space).
       * @param image  the image (<code>null</code> not permitted).
       * @param anchor  the image anchor (<code>null</code> not permitted).
       *
       * @since 1.0.4
       */
      public XYImageAnnotation(double x, double y, Image image,
              RectangleAnchor anchor) {
          if (image == null) {
              throw new IllegalArgumentException("Null 'image' argument.");
          }
          if (anchor == null) {
              throw new IllegalArgumentException("Null 'anchor' argument.");
          }
          this.x = x;
          this.y = y;
          this.image = image;
          this.anchor = anchor;
      }
  
      /**
       * Returns the x-coordinate (in data space) for the annotation.
       *
       * @return The x-coordinate.
       *
       * @since 1.0.4
       */
      public double getX() {
          return this.x;
      }
  
      /**
       * Returns the y-coordinate (in data space) for the annotation.
       *
       * @return The y-coordinate.
       *
       * @since 1.0.4
       */
      public double getY() {
          return this.y;
      }
  
      /**
       * Returns the image for the annotation.
       *
       * @return The image.
       *
       * @since 1.0.4
       */
      public Image getImage() {
          return this.image;
      }
  
      /**
       * Returns the image anchor for the annotation.
       *
       * @return The image anchor.
       *
       * @since 1.0.4
       */
      public RectangleAnchor getImageAnchor() {
          return this.anchor;
      }
  
      /**
       * Draws the annotation.  This method is called by the drawing code in the
       * {@link XYPlot} class, you don't normally need to call this method
       * directly.
       *
       * @param g2  the graphics device.
       * @param plot  the plot.
       * @param dataArea  the data area.
       * @param domainAxis  the domain axis.
       * @param rangeAxis  the range axis.
       * @param rendererIndex  the renderer index.
       * @param info  if supplied, this info object will be populated with
       *              entity information.
       */
      public void draw(Graphics2D g2, XYPlot plot, Rectangle2D dataArea,
                       ValueAxis domainAxis, ValueAxis rangeAxis,
                       int rendererIndex,
                       PlotRenderingInfo info) {
  
          PlotOrientation orientation = plot.getOrientation();
          AxisLocation domainAxisLocation = plot.getDomainAxisLocation();
          AxisLocation rangeAxisLocation = plot.getRangeAxisLocation();
          RectangleEdge domainEdge
              = Plot.resolveDomainAxisLocation(domainAxisLocation, orientation);
          RectangleEdge rangeEdge
              = Plot.resolveRangeAxisLocation(rangeAxisLocation, orientation);
          float j2DX
              = (float) domainAxis.valueToJava2D(this.x, dataArea, domainEdge);
          float j2DY
              = (float) rangeAxis.valueToJava2D(this.y, dataArea, rangeEdge);
          float xx = 0.0f;
          float yy = 0.0f;
          if (orientation == PlotOrientation.HORIZONTAL) {
              xx = j2DY;
              yy = j2DX;
          }
          else if (orientation == PlotOrientation.VERTICAL) {
              xx = j2DX;
              yy = j2DY;
          }
          int w = this.image.getWidth(null);
          int h = this.image.getHeight(null);
  
          Rectangle2D imageRect = new Rectangle2D.Double(0, 0, w, h);
          Point2D anchorPoint = RectangleAnchor.coordinates(imageRect,
                  this.anchor);
          xx = xx - (float) anchorPoint.getX();
          yy = yy - (float) anchorPoint.getY();
          g2.drawImage(this.image, (int) xx, (int) yy, null);
  
          String toolTip = getToolTipText();
          String url = getURL();
          if (toolTip != null || url != null) {
              addEntity(info, new Rectangle2D.Float(xx, yy, w, h), rendererIndex,
                      toolTip, url);
          }
      }
  
      /**
       * Tests this object for equality with an arbitrary object.
       *
       * @param obj  the object (<code>null</code> permitted).
       *
       * @return A boolean.
       */
      public boolean equals(Object obj) {
          if (obj == this) {
              return true;
          }
          // now try to reject equality...
          if (!super.equals(obj)) {
              return false;
          }
          if (!(obj instanceof XYImageAnnotation)) {
              return false;
          }
          XYImageAnnotation that = (XYImageAnnotation) obj;
          if (this.x != that.x) {
              return false;
          }
          if (this.y != that.y) {
              return false;
          }
          if (!ObjectUtilities.equal(this.image, that.image)) {
              return false;
          }
          if (!this.anchor.equals(that.anchor)) {
              return false;
          }
          // seems to be the same...
          return true;
      }
  
      /**
       * Returns a hash code for this object.
       *
       * @return A hash code.
       */
      public int hashCode() {
          return this.image.hashCode();
      }
  
      /**
       * Returns a clone of the annotation.
       *
       * @return A clone.
       *
       * @throws CloneNotSupportedException  if the annotation can't be cloned.
       */
      public Object clone() throws CloneNotSupportedException {
          return super.clone();
      }
  
      /**
       * Provides serialization support.
       *
       * @param stream  the output stream.
       *
       * @throws IOException  if there is an I/O error.
       */
      private void writeObject(ObjectOutputStream stream) throws IOException {
          stream.defaultWriteObject();
          //SerialUtilities.writeImage(this.image, stream);
      }
  
      /**
       * Provides serialization support.
       *
       * @param stream  the input stream.
       *
       * @throws IOException  if there is an I/O error.
       * @throws ClassNotFoundException  if there is a classpath problem.
       */
      private void readObject(ObjectInputStream stream)
          throws IOException, ClassNotFoundException {
          stream.defaultReadObject();
          //this.image = SerialUtilities.readImage(stream);
      }
  
  
  }
  