    001    /* ===========================================================
    002     * JFreeChart : a free chart library for the Java(tm) platform
    003     * ===========================================================
    004     *
    005     * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
    006     *
    007     * Project Info:  http://www.jfree.org/jfreechart/index.html
    008     *
    009     * This library is free software; you can redistribute it and/or modify it
    010     * under the terms of the GNU Lesser General Public License as published by
    011     * the Free Software Foundation; either version 2.1 of the License, or
    012     * (at your option) any later version.
    013     *
    014     * This library is distributed in the hope that it will be useful, but
    015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
    017     * License for more details.
    018     *
    019     * You should have received a copy of the GNU Lesser General Public
    020     * License along with this library; if not, write to the Free Software
    021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
    022     * USA.
    023     *
    024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
    025     * in the United States and other countries.]
    026     *
    027     * ---------------------------
    028     * CategoryTextAnnotation.java
    029     * ---------------------------
    030     * (C) Copyright 2003-2007, by Object Refinery Limited.
    031     *
    032     * Original Author:  David Gilbert (for Object Refinery Limited);
    033     * Contributor(s):   -;
    034     *
    035     * $Id: CategoryTextAnnotation.java,v 1.6.2.3 2007/03/06 16:12:18 mungady Exp $
    036     *
    037     * Changes:
    038     * --------
    039     * 02-Apr-2003 : Version 1 (DG);
    040     * 02-Jul-2003 : Added new text alignment and rotation options (DG);
    041     * 04-Jul-2003 : Added a category anchor option (DG);
    042     * 19-Aug-2003 : Added equals() method and implemented Cloneable (DG);
    043     * 21-Jan-2004 : Update for renamed method in ValueAxis (DG);
    044     * 30-Sep-2004 : Moved drawRotatedString() from RefineryUtilities
    045     *               --> TextUtilities (DG);
    046     * ------------- JFREECHART 1.0.x -------------------------------------------
    047     * 06-Mar-2007 : Implemented hashCode() (DG);
    048     *
    049     */
    050
    051    package org.jfree.chart.annotations;
    052
    053    import java.awt.Graphics2D;
    054    import java.awt.geom.Rectangle2D;
    055    import java.io.Serializable;
    056
    057    import org.jfree.chart.axis.CategoryAnchor;
    058    import org.jfree.chart.axis.CategoryAxis;
    059    import org.jfree.chart.axis.ValueAxis;
    060    import org.jfree.chart.plot.CategoryPlot;
    061    import org.jfree.chart.plot.Plot;
    062    import org.jfree.chart.plot.PlotOrientation;
    063    import org.jfree.data.category.CategoryDataset;
    064    import org.jfree.text.TextUtilities;
    065    import org.jfree.ui.RectangleEdge;
    066
    067    /**
    068     * A text annotation that can be placed on a {@link CategoryPlot}.
    069     */
    070    public class CategoryTextAnnotation extends TextAnnotation
    071                                        implements CategoryAnnotation,
    072                                                   Cloneable, Serializable {
    073
    074        /** For serialization. */
    075        private static final long serialVersionUID = 3333360090781320147L;
    076
    077        /** The category. */
    078        private Comparable category;
    079
    080        /** The category anchor (START, MIDDLE, or END). */
    081        private CategoryAnchor categoryAnchor;
    082
    083        /** The value. */
    084        private double value;
    085
    086        /**
    087         * Creates a new annotation to be displayed at the given location.
    088         *
    089         * @param text  the text (<code>null</code> not permitted).
    090         * @param category  the category (<code>null</code> not permitted).
    091         * @param value  the value.
    092         */
    093        public CategoryTextAnnotation(String text, Comparable category,
    094                                      double value) {
    095            super(text);
    096            if (category == null) {
    097                throw new IllegalArgumentException("Null 'category' argument.");
    098            }
    099            this.category = category;
    100            this.value = value;
    101            this.categoryAnchor = CategoryAnchor.MIDDLE;
    102        }
    103
    104        /**
    105         * Returns the category.
    106         *
    107         * @return The category (never <code>null</code>).
    108         *
    109         * @see #setCategory(Comparable)
    110         */
    111        public Comparable getCategory() {
    112            return this.category;
    113        }
    114
    115        /**
    116         * Sets the category that the annotation attaches to.
    117         *
    118         * @param category  the category (<code>null</code> not permitted).
    119         *
    120         * @see #getCategory()
    121         */
    122        public void setCategory(Comparable category) {
    123            if (category == null) {
    124                throw new IllegalArgumentException("Null 'category' argument.");
    125            }
    126            this.category = category;
    127        }
    128
    129        /**
    130         * Returns the category anchor point.
    131         *
    132         * @return The category anchor point.
    133         *
    134         * @see #setCategoryAnchor(CategoryAnchor)
    135         */
    136        public CategoryAnchor getCategoryAnchor() {
    137            return this.categoryAnchor;
    138        }
    139
    140        /**
    141         * Sets the category anchor point.
    142         *
    143         * @param anchor  the anchor point (<code>null</code> not permitted).
    144         *
    145         * @see #getCategoryAnchor()
    146         */
    147        public void setCategoryAnchor(CategoryAnchor anchor) {
    148            if (anchor == null) {
    149                throw new IllegalArgumentException("Null 'anchor' argument.");
    150            }
    151            this.categoryAnchor = anchor;
    152        }
    153
    154        /**
    155         * Returns the value that the annotation attaches to.
    156         *
    157         * @return The value.
    158         *
    159         * @see #setValue(double)
    160         */
    161        public double getValue() {
    162            return this.value;
    163        }
    164
    165        /**
    166         * Sets the value.
    167         *
    168         * @param value  the value.
    169         *
    170         * @see #getValue()
    171         */
    172        public void setValue(double value) {
    173            this.value = value;
    174        }
    175
    176        /**
    177         * Draws the annotation.
    178         *
    179         * @param g2  the graphics device.
    180         * @param plot  the plot.
    181         * @param dataArea  the data area.
    182         * @param domainAxis  the domain axis.
    183         * @param rangeAxis  the range axis.
    184         */
    185        public void draw(Graphics2D g2, CategoryPlot plot, Rectangle2D dataArea,
    186                         CategoryAxis domainAxis, ValueAxis rangeAxis) {
    187
    188            CategoryDataset dataset = plot.getDataset();
    189            int catIndex = dataset.getColumnIndex(this.category);
    190            int catCount = dataset.getColumnCount();
    191
    192            float anchorX = 0.0f;
    193            float anchorY = 0.0f;
    194            PlotOrientation orientation = plot.getOrientation();
    195            RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
    196                    plot.getDomainAxisLocation(), orientation);
    197            RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
    198                    plot.getRangeAxisLocation(), orientation);
    199
    200            if (orientation == PlotOrientation.HORIZONTAL) {
    201                anchorY = (float) domainAxis.getCategoryJava2DCoordinate(
    202                        this.categoryAnchor, catIndex, catCount, dataArea,
    203                        domainEdge);
    204                anchorX = (float) rangeAxis.valueToJava2D(this.value, dataArea,
    205                        rangeEdge);
    206            }
    207            else if (orientation == PlotOrientation.VERTICAL) {
    208                anchorX = (float) domainAxis.getCategoryJava2DCoordinate(
    209                        this.categoryAnchor, catIndex, catCount, dataArea,
    210                        domainEdge);
    211                anchorY = (float) rangeAxis.valueToJava2D(this.value, dataArea,
    212                        rangeEdge);
    213            }
    214            g2.setFont(getFont());
    215            g2.setPaint(getPaint());
    216            TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY,
    217                    getTextAnchor(), getRotationAngle(), getRotationAnchor());
    218
    219        }
    220
    221        /**
    222         * Tests this object for equality with another.
    223         *
    224         * @param obj  the object (<code>null</code> permitted).
    225         *
    226         * @return <code>true</code> or <code>false</code>.
    227         */
    228        public boolean equals(Object obj) {
    229            if (obj == this) {
    230                return true;
    231            }
    232            if (!(obj instanceof CategoryTextAnnotation)) {
    233                return false;
    234            }
    235            CategoryTextAnnotation that = (CategoryTextAnnotation) obj;
    236            if (!super.equals(obj)) {
    237                return false;
    238            }
    239            if (!this.category.equals(that.getCategory())) {
    240                return false;
    241            }
    242            if (!this.categoryAnchor.equals(that.getCategoryAnchor())) {
    243                return false;
    244            }
    245            if (this.value != that.getValue()) {
    246                return false;
    247            }
    248            return true;
    249        }
    250
    251        /**
    252         * Returns a hash code for this instance.
    253         *
    254         * @return A hash code.
    255         */
    256        public int hashCode() {
    257            int result = super.hashCode();
    258            result = 37 * result + this.category.hashCode();
    259            result = 37 * result + this.categoryAnchor.hashCode();
    260            long temp = Double.doubleToLongBits(this.value);
    261            result = 37 * result + (int) (temp ^ (temp >>> 32));
    262            return result;
    263        }
    264
    265        /**
    266         * Returns a clone of the annotation.
    267         *
    268         * @return A clone.
    269         *
    270         * @throws CloneNotSupportedException  this class will not throw this
    271         *         exception, but subclasses (if any) might.
    272         */
    273        public Object clone() throws CloneNotSupportedException {
    274            return super.clone();
    275        }
    276
    277    }