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File org.jfree.chart.annotations.XYImageAnnotation.java

Here you can find all the information about the file org.jfree.chart.annotations.XYImageAnnotation.java. You may explore it here or download it onto your local disk.
/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2005, 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, 2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: XYImageAnnotation.java,v 1.8.2.1 2005/10/25 16:51:15 mungady Exp $
 *
 * 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);
 *
 */


package org.jfree.chart.annotations;

import java.awt.Graphics2D;
import java.awt.Image;
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.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;

    /**
     * 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) {
        if (image == null) {
            throw new IllegalArgumentException("Null 'image' argument.");      
        }
        this.x = x;
        this.y = y;
        this.image = image;
    }

    /**
     * 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);
        xx = xx - w / 2.0f;
        yy = yy - h / 2.0f;
        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;
        }
        // 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);
    }


}

File Information:

file name:XYImageAnnotation.java
package:org.jfree.chart.annotations
qualified name:org.jfree.chart.annotations.XYImageAnnotation.java
file type:Java Source File
download location:download http://dgpf.sourceforge.net/source/org/jfree/chart/annotations/XYImageAnnotation.java
size:7.958 KB (8149 B)
uploaded: 2018-01-07 12:03:35 GMT+0000
last update: 2006-08-25 12:16:42 GMT+0000
last access: 2018-01-07 12:03:35 GMT+0000

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last modified at 2018-01-07 12:03:34 GMT+0000
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