001    /* ===========================================================
002     * JFreeChart : a free chart library for the Java(tm) platform
003     * ===========================================================
004     *
005     * (C) Copyright 2000-2005, 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     * XYBoxAnnotation.java
029     * --------------------
030     * (C) Copyright 2005, by Object Refinery Limited and Contributors.
031     *
032     * Original Author:  David Gilbert (for Object Refinery Limited);
033     * Contributor(s):   -;
034     *
035     * $Id: XYBoxAnnotation.java,v 1.5.2.2 2005/10/25 16:51:15 mungady Exp $
036     *
037     * Changes:
038     * --------
039     * 19-Jan-2005 : Version 1 (DG);
040     * 06-Jun-2005 : Fixed equals() method to handle GradientPaint (DG);
041     * 
042     */
043     
044    package org.jfree.chart.annotations;
045    
046    import java.awt.BasicStroke;
047    import java.awt.Color;
048    import java.awt.Graphics2D;
049    import java.awt.Paint;
050    import java.awt.Stroke;
051    import java.awt.geom.Rectangle2D;
052    import java.io.IOException;
053    import java.io.ObjectInputStream;
054    import java.io.ObjectOutputStream;
055    import java.io.Serializable;
056    
057    import org.jfree.chart.axis.ValueAxis;
058    import org.jfree.chart.plot.Plot;
059    import org.jfree.chart.plot.PlotOrientation;
060    import org.jfree.chart.plot.PlotRenderingInfo;
061    import org.jfree.chart.plot.XYPlot;
062    import org.jfree.io.SerialUtilities;
063    import org.jfree.ui.RectangleEdge;
064    import org.jfree.util.ObjectUtilities;
065    import org.jfree.util.PaintUtilities;
066    import org.jfree.util.PublicCloneable;
067    
068    /**
069     * A box annotation that can be placed on an {@link XYPlot}.  The 
070     * box coordinates are specified in data space.
071     */
072    public class XYBoxAnnotation extends AbstractXYAnnotation
073                                 implements Cloneable, 
074                                            PublicCloneable, 
075                                            Serializable {
076        
077        /** For serialization. */
078        private static final long serialVersionUID = 6764703772526757457L;
079        
080        /** The lower x-coordinate. */
081        private double x0;
082        
083        /** The lower y-coordinate. */
084        private double y0;
085    
086        /** The upper x-coordinate. */
087        private double x1;
088        
089        /** The upper y-coordinate. */
090        private double y1;
091    
092        /** The stroke used to draw the box outline. */
093        private transient Stroke stroke;
094    
095        /** The paint used to draw the box outline. */
096        private transient Paint outlinePaint;
097        
098        /** The paint used to fill the box. */
099        private transient Paint fillPaint;
100    
101        /**
102         * Creates a new annotation (where, by default, the box is drawn 
103         * with a black outline).
104         * 
105         * @param x0  the lower x-coordinate of the box (in data space).
106         * @param y0  the lower y-coordinate of the box (in data space).
107         * @param x1  the upper x-coordinate of the box (in data space).
108         * @param y1  the upper y-coordinate of the box (in data space).
109         */
110        public XYBoxAnnotation(double x0, double y0, double x1, double y1) {
111            this(x0, y0, x1, y1, new BasicStroke(1.0f), Color.black);
112        }
113        
114        /**
115         * Creates a new annotation where the box is drawn as an outline using
116         * the specified <code>stroke</code> and <code>outlinePaint</code>.
117         *
118         * @param x0  the lower x-coordinate of the box (in data space).
119         * @param y0  the lower y-coordinate of the box (in data space).
120         * @param x1  the upper x-coordinate of the box (in data space).
121         * @param y1  the upper y-coordinate of the box (in data space).
122         * @param stroke  the shape stroke (<code>null</code> not permitted).
123         * @param outlinePaint  the shape color (<code>null</code> not permitted).
124         */
125        public XYBoxAnnotation(double x0, double y0, double x1, double y1, 
126                               Stroke stroke, Paint outlinePaint) {
127            this(x0, y0, x1, y1, stroke, outlinePaint, null);
128        }
129    
130        /**
131         * Creates a new annotation.
132         *
133         * @param x0  the lower x-coordinate of the box (in data space).
134         * @param y0  the lower y-coordinate of the box (in data space).
135         * @param x1  the upper x-coordinate of the box (in data space).
136         * @param y1  the upper y-coordinate of the box (in data space).
137         * @param stroke  the shape stroke (<code>null</code> permitted).
138         * @param outlinePaint  the shape color (<code>null</code> permitted).
139         * @param fillPaint  the paint used to fill the shape (<code>null</code> 
140         *                   permitted).
141         */
142        public XYBoxAnnotation(double x0, double y0, double x1, double y1, 
143                               Stroke stroke, Paint outlinePaint, Paint fillPaint) {
144            this.x0 = x0;
145            this.y0 = y0;
146            this.x1 = x1;
147            this.y1 = y1;
148            this.stroke = stroke;
149            this.outlinePaint = outlinePaint;
150            this.fillPaint = fillPaint;
151        }
152    
153        /**
154         * Draws the annotation.  This method is usually called by the 
155         * {@link XYPlot} class, you shouldn't need to call it directly.
156         *
157         * @param g2  the graphics device.
158         * @param plot  the plot.
159         * @param dataArea  the data area.
160         * @param domainAxis  the domain axis.
161         * @param rangeAxis  the range axis.
162         * @param rendererIndex  the renderer index.
163         * @param info  the plot rendering info.
164         */
165        public void draw(Graphics2D g2, XYPlot plot, Rectangle2D dataArea,
166                         ValueAxis domainAxis, ValueAxis rangeAxis, 
167                         int rendererIndex, PlotRenderingInfo info) {
168    
169            PlotOrientation orientation = plot.getOrientation();
170            RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
171                plot.getDomainAxisLocation(), orientation
172            );
173            RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
174                plot.getRangeAxisLocation(), orientation
175            );
176    
177            double transX0 = domainAxis.valueToJava2D(
178                this.x0, dataArea, domainEdge
179            ); 
180            double transY0 = rangeAxis.valueToJava2D(this.y0, dataArea, rangeEdge); 
181            double transX1 = domainAxis.valueToJava2D(
182                this.x1, dataArea, domainEdge
183            ); 
184            double transY1 = rangeAxis.valueToJava2D(this.y1, dataArea, rangeEdge); 
185    
186            Rectangle2D box = null;
187            if (orientation == PlotOrientation.HORIZONTAL) {
188                box = new Rectangle2D.Double(
189                    transY0, transX1, transY1 - transY0, transX0 - transX1
190                );
191            }
192            else if (orientation == PlotOrientation.VERTICAL) {
193                box = new Rectangle2D.Double(
194                    transX0, transY1, transX1 - transX0, transY0 - transY1
195                );
196            }
197    
198            if (this.fillPaint != null) {
199                g2.setPaint(this.fillPaint);
200                g2.fill(box);
201            }
202            
203            if (this.stroke != null && this.outlinePaint != null) {
204                g2.setPaint(this.outlinePaint);
205                g2.setStroke(this.stroke);
206                g2.draw(box);
207            }
208            addEntity(info, box, rendererIndex, getToolTipText(), getURL());
209            
210        }
211            
212        /**
213         * Tests this annotation for equality with an arbitrary object.
214         * 
215         * @param obj  the object (<code>null</code> permitted).
216         * 
217         * @return A boolean.
218         */
219        public boolean equals(Object obj) {
220            if (obj == this) {
221                return true;
222            }
223            // now try to reject equality
224            if (!super.equals(obj)) {
225                return false;
226            }
227            if (!(obj instanceof XYBoxAnnotation)) {
228                return false;
229            }
230            XYBoxAnnotation that = (XYBoxAnnotation) obj;
231            if (!(this.x0 == that.x0)) {
232                return false;
233            }
234            if (!(this.y0 == that.y0)) {
235                return false;
236            }
237            if (!(this.x1 == that.x1)) {
238                return false;
239            }
240            if (!(this.y1 == that.y1)) {
241                return false;
242            }
243            if (!ObjectUtilities.equal(this.stroke, that.stroke)) {
244                return false;
245            }
246            if (!PaintUtilities.equal(this.outlinePaint, that.outlinePaint)) {
247                return false;
248            }
249            if (!PaintUtilities.equal(this.fillPaint, that.fillPaint)) {
250                return false;
251            }
252            // seem to be the same
253            return true;
254        }
255        
256        /**
257         * Returns a hash code.
258         * 
259         * @return A hash code.
260         */
261        public int hashCode() {
262            int result;
263            long temp;
264            temp = Double.doubleToLongBits(this.x0);
265            result = (int) (temp ^ (temp >>> 32));
266            temp = Double.doubleToLongBits(this.x1);
267            result = 29 * result + (int) (temp ^ (temp >>> 32));
268            temp = Double.doubleToLongBits(this.y0);
269            result = 29 * result + (int) (temp ^ (temp >>> 32));
270            temp = Double.doubleToLongBits(this.y1);
271            result = 29 * result + (int) (temp ^ (temp >>> 32));
272            return result;
273        }
274    
275        /**
276         * Returns a clone.
277         * 
278         * @return A clone.
279         * 
280         * @throws CloneNotSupportedException not thrown by this class, but may be
281         *                                    by subclasses.
282         */
283        public Object clone() throws CloneNotSupportedException {
284            return super.clone();
285        }
286        
287        /**
288         * Provides serialization support.
289         *
290         * @param stream  the output stream (<code>null</code> not permitted).
291         *
292         * @throws IOException if there is an I/O error.
293         */
294        private void writeObject(ObjectOutputStream stream) throws IOException {
295            stream.defaultWriteObject();
296            SerialUtilities.writeStroke(this.stroke, stream);
297            SerialUtilities.writePaint(this.outlinePaint, stream);
298            SerialUtilities.writePaint(this.fillPaint, stream);
299        }
300    
301        /**
302         * Provides serialization support.
303         *
304         * @param stream  the input stream (<code>null</code> not permitted).
305         *
306         * @throws IOException  if there is an I/O error.
307         * @throws ClassNotFoundException  if there is a classpath problem.
308         */
309        private void readObject(ObjectInputStream stream) 
310            throws IOException, ClassNotFoundException {
311            
312            stream.defaultReadObject();
313            this.stroke = SerialUtilities.readStroke(stream);
314            this.outlinePaint = SerialUtilities.readPaint(stream);
315            this.fillPaint = SerialUtilities.readPaint(stream);
316        }
317    
318    }