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jfreechart example source code file (XYDataImageAnnotation.java)

This example jfreechart source code file (XYDataImageAnnotation.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

awt, axislocation, clonenotsupportedexception, geometry, image, io, ioexception, ioexception, publiccloneable, range, range, rectangleedge, string, string, valueaxis, xydataimageannotation, xydataimageannotation

The jfreechart XYDataImageAnnotation.java source code

/* ===========================================================
 * 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.]
 *
 * --------------------------
 * XYDataImageAnnotation.java
 * --------------------------
 * (C) Copyright 2008, 2009, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes:
 * --------
 * 17-Sep-2008 : Version 1, based on XYImageAnnotation (DG);
 * 10-Mar-2009 : Implemented XYAnnotationBoundsInfo (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 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.data.Range;
import org.jfree.ui.RectangleEdge;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PublicCloneable;

/**
 * An annotation that allows an image to be placed within a rectangle specified
 * in data coordinates on an {@link XYPlot}.  Note that this annotation
 * is not currently serializable, so don't use it if you plan on serializing
 * your chart(s).
 *
 * @since 1.0.11
 */
public class XYDataImageAnnotation extends AbstractXYAnnotation
        implements Cloneable, PublicCloneable, XYAnnotationBoundsInfo {

    /** The image. */
    private transient Image image;

    /**
     * The x-coordinate (in data space).
     */
    private double x;

    /**
     * The y-coordinate (in data space).
     */
    private double y;

    /**
     * The image display area width in data coordinates.
     */
    private double w;

    /**
     * The image display area height in data coordinates.
     */
    private double h;

    /**
     * A flag indicating whether or not the annotation should contribute to
     * the data range for a plot/renderer.
     *
     * @since 1.0.13
     */
    private boolean includeInDataBounds;

    /**
     * Creates a new annotation to be displayed within the specified rectangle.
     *
     * @param image  the image (<code>null not permitted).
     * @param x  the x-coordinate (in data space).
     * @param y  the y-coordinate (in data space).
     * @param w  the image display area width.
     * @param h  the image display area height.
     */
    public XYDataImageAnnotation(Image image, double x, double y, double w,
            double h) {
        this(image, x, y, w, h, false);
    }

    /**
     * Creates a new annotation to be displayed within the specified rectangle.
     *
     * @param image  the image (<code>null not permitted).
     * @param x  the x-coordinate (in data space).
     * @param y  the y-coordinate (in data space).
     * @param w  the image display area width.
     * @param h  the image display area height.
     * @param includeInDataBounds  a flag that controls whether or not the
     *     annotation is included in the data bounds for the axis autoRange.
     *
     * @since 1.0.13
     */
    public XYDataImageAnnotation(Image image, double x, double y, double w,
            double h, boolean includeInDataBounds) {

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

    /**
     * Returns the image for the annotation.
     *
     * @return The image.
     */
    public Image getImage() {
        return this.image;
    }

    /**
     * Returns the x-coordinate (in data space) for the annotation.
     *
     * @return The x-coordinate.
     */
    public double getX() {
        return this.x;
    }

    /**
     * Returns the y-coordinate (in data space) for the annotation.
     *
     * @return The y-coordinate.
     */
    public double getY() {
        return this.y;
    }

    /**
     * Returns the width (in data space) of the data rectangle into which the
     * image will be drawn.
     *
     * @return The width.
     */
    public double getWidth() {
        return this.w;
    }

    /**
     * Returns the height (in data space) of the data rectangle into which the
     * image will be drawn.
     *
     * @return The height.
     */
    public double getHeight() {
        return this.h;
    }

    /**
     * Returns the flag that controls whether or not the annotation should
     * contribute to the autoRange for the axis it is plotted against.
     *
     * @return A boolean.
     *
     * @since 1.0.13
     */
    public boolean getIncludeInDataBounds() {
        return this.includeInDataBounds;
    }

    /**
     * Returns the x-range for the annotation.
     *
     * @return The range.
     *
     * @since 1.0.13
     */
    public Range getXRange() {
        return new Range(this.x, this.x + this.w);
    }

    /**
     * Returns the y-range for the annotation.
     *
     * @return The range.
     *
     * @since 1.0.13
     */
    public Range getYRange() {
        return new Range(this.y, this.y + this.h);
    }

    /**
     * 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 xAxisLocation = plot.getDomainAxisLocation();
        AxisLocation yAxisLocation = plot.getRangeAxisLocation();
        RectangleEdge xEdge = Plot.resolveDomainAxisLocation(xAxisLocation,
                orientation);
        RectangleEdge yEdge = Plot.resolveRangeAxisLocation(yAxisLocation,
                orientation);
        float j2DX0 = (float) domainAxis.valueToJava2D(this.x, dataArea, xEdge);
        float j2DY0 = (float) rangeAxis.valueToJava2D(this.y, dataArea, yEdge);
        float j2DX1 = (float) domainAxis.valueToJava2D(this.x + this.w,
                dataArea, xEdge);
        float j2DY1 = (float) rangeAxis.valueToJava2D(this.y + this.h,
                dataArea, yEdge);
        float xx0 = 0.0f;
        float yy0 = 0.0f;
        float xx1 = 0.0f;
        float yy1 = 0.0f;
        if (orientation == PlotOrientation.HORIZONTAL) {
            xx0 = j2DY0;
            xx1 = j2DY1;
            yy0 = j2DX0;
            yy1 = j2DX1;
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            xx0 = j2DX0;
            xx1 = j2DX1;
            yy0 = j2DY0;
            yy1 = j2DY1;
        }
        // TODO: rotate the image when drawn with horizontal orientation?
        g2.drawImage(this.image, (int) xx0, (int) Math.min(yy0, yy1),
                (int) (xx1 - xx0), (int) Math.abs(yy1 - yy0), null);
        String toolTip = getToolTipText();
        String url = getURL();
        if (toolTip != null || url != null) {
            addEntity(info, new Rectangle2D.Float(xx0, yy0, (xx1 - xx0),
                    (yy1 - yy0)), rendererIndex, toolTip, url);
        }
    }

    /**
     * Tests this object for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null 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 XYDataImageAnnotation)) {
            return false;
        }
        XYDataImageAnnotation that = (XYDataImageAnnotation) obj;
        if (this.x != that.x) {
            return false;
        }
        if (this.y != that.y) {
            return false;
        }
        if (this.w != that.w) {
            return false;
        }
        if (this.h != that.h) {
            return false;
        }
        if (this.includeInDataBounds != that.includeInDataBounds) {
            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();
        // FIXME
        //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();
        // FIXME
        //this.image = SerialUtilities.readImage(stream);
    }

}

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