Source for org.jfree.chart.renderer.xy.XYAreaRenderer

   1: /* ===========================================================
   2:  * JFreeChart : a free chart library for the Java(tm) platform
   3:  * ===========================================================
   4:  *
   5:  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
   6:  *
   7:  * Project Info:  http://www.jfree.org/jfreechart/index.html
   8:  *
   9:  * This library is free software; you can redistribute it and/or modify it 
  10:  * under the terms of the GNU Lesser General Public License as published by 
  11:  * the Free Software Foundation; either version 2.1 of the License, or 
  12:  * (at your option) any later version.
  13:  *
  14:  * This library is distributed in the hope that it will be useful, but 
  15:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
  16:  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
  17:  * License for more details.
  18:  *
  19:  * You should have received a copy of the GNU Lesser General Public
  20:  * License along with this library; if not, write to the Free Software
  21:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
  22:  * USA.  
  23:  *
  24:  * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
  25:  * in the United States and other countries.]
  26:  *
  27:  * -------------------
  28:  * XYAreaRenderer.java
  29:  * -------------------
  30:  * (C) Copyright 2002-2005, by Hari and Contributors.
  31:  *
  32:  * Original Author:  Hari (ourhari@hotmail.com);
  33:  * Contributor(s):   David Gilbert (for Object Refinery Limited);
  34:  *                   Richard Atkinson;
  35:  *                   Christian W. Zuckschwerdt;
  36:  *
  37:  * $Id: XYAreaRenderer.java,v 1.12.2.5 2005/12/22 15:53:05 mungady Exp $
  38:  *
  39:  * Changes:
  40:  * --------
  41:  * 03-Apr-2002 : Version 1, contributed by Hari.  This class is based on the 
  42:  *               StandardXYItemRenderer class (DG);
  43:  * 09-Apr-2002 : Removed the translated zero from the drawItem method - 
  44:  *               overridden the initialise() method to calculate it (DG);
  45:  * 30-May-2002 : Added tool tip generator to constructor to match super 
  46:  *               class (DG);
  47:  * 25-Jun-2002 : Removed unnecessary local variable (DG);
  48:  * 05-Aug-2002 : Small modification to drawItem method to support URLs for HTML
  49:  *               image maps (RA);
  50:  * 01-Oct-2002 : Fixed errors reported by Checkstyle (DG);
  51:  * 07-Nov-2002 : Renamed AreaXYItemRenderer --> XYAreaRenderer (DG);
  52:  * 25-Mar-2003 : Implemented Serializable (DG);
  53:  * 01-May-2003 : Modified drawItem() method signature (DG);
  54:  * 27-Jul-2003 : Made line and polygon properties protected rather than 
  55:  *               private (RA);
  56:  * 30-Jul-2003 : Modified entity constructor (CZ);
  57:  * 20-Aug-2003 : Implemented Cloneable and PublicCloneable (DG);
  58:  * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
  59:  * 07-Oct-2003 : Added renderer state (DG);
  60:  * 08-Dec-2003 : Modified hotspot for chart entity (DG);
  61:  * 10-Feb-2004 : Changed the drawItem() method to make cut-and-paste overriding
  62:  *               easier.  Also moved state class into this class (DG);
  63:  * 25-Feb-2004 : Replaced CrosshairInfo with CrosshairState.  Renamed 
  64:  *               XYToolTipGenerator --> XYItemLabelGenerator (DG);
  65:  * 15-Jul-2004 : Switched getX() with getXValue() and getY() with 
  66:  *               getYValue() (DG);
  67:  * 11-Nov-2004 : Now uses ShapeUtilities to translate shapes (DG);
  68:  * 19-Jan-2005 : Now accesses primitives only from dataset (DG);
  69:  * 21-Mar-2005 : Override getLegendItem() and equals() methods (DG);
  70:  * 20-Apr-2005 : Use generators for legend tooltips and URLs (DG);
  71:  * 
  72:  */
  73: 
  74: package org.jfree.chart.renderer.xy;
  75: 
  76: import java.awt.Graphics2D;
  77: import java.awt.Paint;
  78: import java.awt.Polygon;
  79: import java.awt.Shape;
  80: import java.awt.Stroke;
  81: import java.awt.geom.GeneralPath;
  82: import java.awt.geom.Line2D;
  83: import java.awt.geom.Rectangle2D;
  84: import java.io.IOException;
  85: import java.io.ObjectInputStream;
  86: import java.io.ObjectOutputStream;
  87: import java.io.Serializable;
  88: 
  89: import org.jfree.chart.LegendItem;
  90: import org.jfree.chart.axis.ValueAxis;
  91: import org.jfree.chart.entity.EntityCollection;
  92: import org.jfree.chart.entity.XYItemEntity;
  93: import org.jfree.chart.event.RendererChangeEvent;
  94: import org.jfree.chart.labels.XYSeriesLabelGenerator;
  95: import org.jfree.chart.labels.XYToolTipGenerator;
  96: import org.jfree.chart.plot.CrosshairState;
  97: import org.jfree.chart.plot.PlotOrientation;
  98: import org.jfree.chart.plot.PlotRenderingInfo;
  99: import org.jfree.chart.plot.XYPlot;
 100: import org.jfree.chart.urls.XYURLGenerator;
 101: import org.jfree.data.xy.XYDataset;
 102: import org.jfree.io.SerialUtilities;
 103: import org.jfree.util.PublicCloneable;
 104: import org.jfree.util.ShapeUtilities;
 105: 
 106: /**
 107:  * Area item renderer for an {@link XYPlot}.  This class can draw (a) shapes at
 108:  * each point, or (b) lines between points, or (c) both shapes and lines, 
 109:  * or (d) filled areas, or (e) filled areas and shapes.
 110:  */
 111: public class XYAreaRenderer extends AbstractXYItemRenderer 
 112:                             implements XYItemRenderer, 
 113:                                        Cloneable,
 114:                                        PublicCloneable,
 115:                                        Serializable {
 116: 
 117:     /** For serialization. */
 118:     private static final long serialVersionUID = -4481971353973876747L;
 119:     
 120:     /**
 121:      * A state object used by this renderer.
 122:      */
 123:     static class XYAreaRendererState extends XYItemRendererState {
 124:         
 125:         /** Working storage for the area under one series. */
 126:         public Polygon area;
 127:         
 128:         /** Working line that can be recycled. */
 129:         public Line2D line;
 130:         
 131:         /**
 132:          * Creates a new state.
 133:          * 
 134:          * @param info  the plot rendering info.
 135:          */
 136:         public XYAreaRendererState(PlotRenderingInfo info) {
 137:             super(info);
 138:             this.area = new Polygon();
 139:             this.line = new Line2D.Double();
 140:         }
 141:         
 142:     }
 143:     
 144:     /** Useful constant for specifying the type of rendering (shapes only). */
 145:     public static final int SHAPES = 1;
 146: 
 147:     /** Useful constant for specifying the type of rendering (lines only). */
 148:     public static final int LINES = 2;
 149: 
 150:     /** 
 151:      * Useful constant for specifying the type of rendering (shapes and lines).
 152:      */
 153:     public static final int SHAPES_AND_LINES = 3;
 154: 
 155:     /** Useful constant for specifying the type of rendering (area only). */
 156:     public static final int AREA = 4;
 157: 
 158:     /** 
 159:      * Useful constant for specifying the type of rendering (area and shapes). 
 160:      */
 161:     public static final int AREA_AND_SHAPES = 5;
 162: 
 163:     /** A flag indicating whether or not shapes are drawn at each XY point. */
 164:     private boolean plotShapes;
 165: 
 166:     /** A flag indicating whether or not lines are drawn between XY points. */
 167:     private boolean plotLines;
 168: 
 169:     /** A flag indicating whether or not Area are drawn at each XY point. */
 170:     private boolean plotArea;
 171: 
 172:     /** A flag that controls whether or not the outline is shown. */
 173:     private boolean showOutline;
 174: 
 175:     /** 
 176:      * The shape used to represent an area in each legend item (this should 
 177:      * never be <code>null</code>). 
 178:      */
 179:     private transient Shape legendArea;
 180: 
 181:     /**
 182:      * Constructs a new renderer.
 183:      */
 184:     public XYAreaRenderer() {
 185:         this(AREA);
 186:     }
 187: 
 188:     /**
 189:      * Constructs a new renderer.
 190:      *
 191:      * @param type  the type of the renderer.
 192:      */
 193:     public XYAreaRenderer(int type) {
 194:         this(type, null, null);
 195:     }
 196: 
 197:     /**
 198:      * Constructs a new renderer.
 199:      * <p>
 200:      * To specify the type of renderer, use one of the constants: SHAPES, LINES,
 201:      * SHAPES_AND_LINES, AREA or AREA_AND_SHAPES.
 202:      *
 203:      * @param type  the type of renderer.
 204:      * @param toolTipGenerator  the tool tip generator to use 
 205:      *                          (<code>null</code> permitted).
 206:      * @param urlGenerator  the URL generator (<code>null</code> permitted).
 207:      */
 208:     public XYAreaRenderer(int type, XYToolTipGenerator toolTipGenerator, 
 209:                           XYURLGenerator urlGenerator) {
 210: 
 211:         super();
 212:         setBaseToolTipGenerator(toolTipGenerator);
 213:         setURLGenerator(urlGenerator);
 214: 
 215:         if (type == SHAPES) {
 216:             this.plotShapes = true;
 217:         }
 218:         if (type == LINES) {
 219:             this.plotLines = true;
 220:         }
 221:         if (type == SHAPES_AND_LINES) {
 222:             this.plotShapes = true;
 223:             this.plotLines = true;
 224:         }
 225:         if (type == AREA) {
 226:             this.plotArea = true;
 227:         }
 228:         if (type == AREA_AND_SHAPES) {
 229:             this.plotArea = true;
 230:             this.plotShapes = true;
 231:         }
 232:         this.showOutline = false;
 233:         GeneralPath area = new GeneralPath();
 234:         area.moveTo(0.0f, -4.0f);
 235:         area.lineTo(3.0f, -2.0f);
 236:         area.lineTo(4.0f, 4.0f);
 237:         area.lineTo(-4.0f, 4.0f);
 238:         area.lineTo(-3.0f, -2.0f);
 239:         area.closePath();
 240:         this.legendArea = area;
 241: 
 242:     }
 243: 
 244:     /**
 245:      * Returns a flag that controls whether or not outlines of the areas are 
 246:      * drawn.
 247:      *
 248:      * @return The flag.
 249:      */
 250:     public boolean isOutline() {
 251:         return this.showOutline;
 252:     }
 253: 
 254:     /**
 255:      * Sets a flag that controls whether or not outlines of the areas are drawn.
 256:      *
 257:      * @param show  the flag.
 258:      */
 259:     public void setOutline(boolean show) {
 260:         this.showOutline = show;
 261:     }
 262: 
 263:     /**
 264:      * Returns true if shapes are being plotted by the renderer.
 265:      *
 266:      * @return <code>true</code> if shapes are being plotted by the renderer.
 267:      */
 268:     public boolean getPlotShapes() {
 269:         return this.plotShapes;
 270:     }
 271: 
 272:     /**
 273:      * Returns true if lines are being plotted by the renderer.
 274:      *
 275:      * @return <code>true</code> if lines are being plotted by the renderer.
 276:      */
 277:     public boolean getPlotLines() {
 278:         return this.plotLines;
 279:     }
 280: 
 281:     /**
 282:      * Returns true if Area is being plotted by the renderer.
 283:      *
 284:      * @return <code>true</code> if Area is being plotted by the renderer.
 285:      */
 286:     public boolean getPlotArea() {
 287:         return this.plotArea;
 288:     }
 289: 
 290:     /**
 291:      * Returns the shape used to represent an area in the legend.
 292:      * 
 293:      * @return The legend area (never <code>null</code>).
 294:      */
 295:     public Shape getLegendArea() {
 296:         return this.legendArea;   
 297:     }
 298:     
 299:     /**
 300:      * Sets the shape used as an area in each legend item and sends a 
 301:      * {@link RendererChangeEvent} to all registered listeners.
 302:      * 
 303:      * @param area  the area (<code>null</code> not permitted).
 304:      */
 305:     public void setLegendArea(Shape area) {
 306:         if (area == null) {
 307:             throw new IllegalArgumentException("Null 'area' argument.");   
 308:         }
 309:         this.legendArea = area;
 310:         notifyListeners(new RendererChangeEvent(this));
 311:     }
 312: 
 313:     /**
 314:      * Initialises the renderer and returns a state object that should be 
 315:      * passed to all subsequent calls to the drawItem() method.
 316:      *
 317:      * @param g2  the graphics device.
 318:      * @param dataArea  the area inside the axes.
 319:      * @param plot  the plot.
 320:      * @param data  the data.
 321:      * @param info  an optional info collection object to return data back to 
 322:      *              the caller.
 323:      *
 324:      * @return A state object for use by the renderer.
 325:      */
 326:     public XYItemRendererState initialise(Graphics2D g2, Rectangle2D dataArea,
 327:             XYPlot plot, XYDataset data, PlotRenderingInfo info) {
 328:         XYAreaRendererState state = new XYAreaRendererState(info);
 329:         return state;
 330:     }
 331: 
 332:     /**
 333:      * Returns a default legend item for the specified series.  Subclasses 
 334:      * should override this method to generate customised items.
 335:      *
 336:      * @param datasetIndex  the dataset index (zero-based).
 337:      * @param series  the series index (zero-based).
 338:      *
 339:      * @return A legend item for the series.
 340:      */
 341:     public LegendItem getLegendItem(int datasetIndex, int series) {
 342:         LegendItem result = null;
 343:         XYPlot xyplot = getPlot();
 344:         if (xyplot != null) {
 345:             XYDataset dataset = xyplot.getDataset(datasetIndex);
 346:             if (dataset != null) {
 347:                 XYSeriesLabelGenerator lg = getLegendItemLabelGenerator();
 348:                 String label = lg.generateLabel(dataset, series);
 349:                 String description = label;
 350:                 String toolTipText = null;
 351:                 if (getLegendItemToolTipGenerator() != null) {
 352:                     toolTipText = getLegendItemToolTipGenerator().generateLabel(
 353:                             dataset, series);
 354:                 }
 355:                 String urlText = null;
 356:                 if (getLegendItemURLGenerator() != null) {
 357:                     urlText = getLegendItemURLGenerator().generateLabel(
 358:                             dataset, series);
 359:                 }
 360:                 Paint paint = getSeriesPaint(series);
 361:                 result = new LegendItem(label, description, toolTipText, 
 362:                         urlText, this.legendArea, paint);
 363:             }
 364:         }
 365:         return result;
 366:     }
 367: 
 368:     /**
 369:      * Draws the visual representation of a single data item.
 370:      *
 371:      * @param g2  the graphics device.
 372:      * @param state  the renderer state.
 373:      * @param dataArea  the area within which the data is being drawn.
 374:      * @param info  collects information about the drawing.
 375:      * @param plot  the plot (can be used to obtain standard color information 
 376:      *              etc).
 377:      * @param domainAxis  the domain axis.
 378:      * @param rangeAxis  the range axis.
 379:      * @param dataset  the dataset.
 380:      * @param series  the series index (zero-based).
 381:      * @param item  the item index (zero-based).
 382:      * @param crosshairState  crosshair information for the plot 
 383:      *                        (<code>null</code> permitted).
 384:      * @param pass  the pass index.
 385:      */
 386:     public void drawItem(Graphics2D g2, XYItemRendererState state,
 387:             Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot,
 388:             ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset,
 389:             int series, int item, CrosshairState crosshairState, int pass) {
 390:         
 391:         if (!getItemVisible(series, item)) {
 392:             return;   
 393:         }
 394:         XYAreaRendererState areaState = (XYAreaRendererState) state;
 395:         
 396:         // get the data point...
 397:         double x1 = dataset.getXValue(series, item);
 398:         double y1 = dataset.getYValue(series, item);
 399:         if (Double.isNaN(y1)) {
 400:             y1 = 0.0;
 401:         }
 402:         double transX1 = domainAxis.valueToJava2D(x1, dataArea, 
 403:                 plot.getDomainAxisEdge());
 404:         double transY1 = rangeAxis.valueToJava2D(y1, dataArea, 
 405:                 plot.getRangeAxisEdge());
 406:         
 407:         // get the previous point and the next point so we can calculate a 
 408:         // "hot spot" for the area (used by the chart entity)...
 409:         int itemCount = dataset.getItemCount(series);
 410:         double x0 = dataset.getXValue(series, Math.max(item - 1, 0));
 411:         double y0 = dataset.getYValue(series, Math.max(item - 1, 0));
 412:         if (Double.isNaN(y0)) {
 413:             y0 = 0.0;
 414:         }
 415:         double transX0 = domainAxis.valueToJava2D(x0, dataArea, 
 416:                 plot.getDomainAxisEdge());
 417:         double transY0 = rangeAxis.valueToJava2D(y0, dataArea, 
 418:                 plot.getRangeAxisEdge());
 419:         
 420:         double x2 = dataset.getXValue(series, Math.min(item + 1, 
 421:                 itemCount - 1));
 422:         double y2 = dataset.getYValue(series, Math.min(item + 1, 
 423:                 itemCount - 1));
 424:         if (Double.isNaN(y2)) {
 425:             y2 = 0.0;
 426:         }
 427:         double transX2 = domainAxis.valueToJava2D(x2, dataArea, 
 428:                 plot.getDomainAxisEdge());
 429:         double transY2 = rangeAxis.valueToJava2D(y2, dataArea, 
 430:                 plot.getRangeAxisEdge());
 431:         
 432:         double transZero = rangeAxis.valueToJava2D(0.0, dataArea, 
 433:                 plot.getRangeAxisEdge());
 434:         Polygon hotspot = null;
 435:         if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {
 436:             hotspot = new Polygon();
 437:             hotspot.addPoint((int) transZero, 
 438:                     (int) ((transX0 + transX1) / 2.0));
 439:             hotspot.addPoint((int) ((transY0 + transY1) / 2.0), 
 440:                     (int) ((transX0 + transX1) / 2.0));
 441:             hotspot.addPoint((int) transY1, (int) transX1);
 442:             hotspot.addPoint((int) ((transY1 + transY2) / 2.0), 
 443:                     (int) ((transX1 + transX2) / 2.0));
 444:             hotspot.addPoint((int) transZero, 
 445:                     (int) ((transX1 + transX2) / 2.0));
 446:         }
 447:         else {  // vertical orientation
 448:             hotspot = new Polygon();
 449:             hotspot.addPoint((int) ((transX0 + transX1) / 2.0), 
 450:                     (int) transZero);
 451:             hotspot.addPoint((int) ((transX0 + transX1) / 2.0), 
 452:                     (int) ((transY0 + transY1) / 2.0));
 453:             hotspot.addPoint((int) transX1, (int) transY1);
 454:             hotspot.addPoint((int) ((transX1 + transX2) / 2.0), 
 455:                     (int) ((transY1 + transY2) / 2.0));
 456:             hotspot.addPoint((int) ((transX1 + transX2) / 2.0), 
 457:                     (int) transZero);
 458:         }
 459:         
 460:         if (item == 0) {  // create a new area polygon for the series
 461:             areaState.area = new Polygon();
 462:             // the first point is (x, 0)
 463:             double zero = rangeAxis.valueToJava2D(0.0, dataArea, 
 464:                     plot.getRangeAxisEdge());
 465:             if (plot.getOrientation() == PlotOrientation.VERTICAL) {
 466:                 areaState.area.addPoint((int) transX1, (int) zero);
 467:             }
 468:             else if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {
 469:                 areaState.area.addPoint((int) zero, (int) transX1);
 470:             }
 471:         }
 472: 
 473:         // Add each point to Area (x, y)
 474:         if (plot.getOrientation() == PlotOrientation.VERTICAL) {
 475:             areaState.area.addPoint((int) transX1, (int) transY1);
 476:         }
 477:         else if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {
 478:             areaState.area.addPoint((int) transY1, (int) transX1);
 479:         }
 480:         
 481:         PlotOrientation orientation = plot.getOrientation();
 482:         Paint paint = getItemPaint(series, item);
 483:         Stroke stroke = getItemStroke(series, item);
 484:         g2.setPaint(paint);
 485:         g2.setStroke(stroke);
 486:         
 487:         Shape shape = null;
 488:         if (getPlotShapes()) {
 489:             shape = getItemShape(series, item);
 490:             if (orientation == PlotOrientation.VERTICAL) {
 491:                 shape = ShapeUtilities.createTranslatedShape(shape, transX1, 
 492:                         transY1);
 493:             }
 494:             else if (orientation == PlotOrientation.HORIZONTAL) {
 495:                 shape = ShapeUtilities.createTranslatedShape(shape, transY1, 
 496:                         transX1);
 497:             }
 498:             g2.draw(shape);
 499:         }
 500: 
 501:         if (getPlotLines()) {
 502:             if (item > 0) {
 503:                 if (plot.getOrientation() == PlotOrientation.VERTICAL) {
 504:                     areaState.line.setLine(transX0, transY0, transX1, transY1);
 505:                 }
 506:                 else if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {
 507:                     areaState.line.setLine(transY0, transX0, transY1, transX1);
 508:                 }
 509:                 g2.draw(areaState.line);
 510:             }
 511:         }
 512: 
 513:         // Check if the item is the last item for the series.
 514:         // and number of items > 0.  We can't draw an area for a single point.
 515:         if (getPlotArea() && item > 0 && item == (itemCount - 1)) {
 516: 
 517:             if (orientation == PlotOrientation.VERTICAL) {
 518:                 // Add the last point (x,0)
 519:                 areaState.area.addPoint((int) transX1, (int) transZero);
 520:             }
 521:             else if (orientation == PlotOrientation.HORIZONTAL) {
 522:                 // Add the last point (x,0)
 523:                 areaState.area.addPoint((int) transZero, (int) transX1);
 524:             }
 525: 
 526:             g2.fill(areaState.area);
 527: 
 528:             // draw an outline around the Area.
 529:             if (isOutline()) {
 530:                 g2.setStroke(getItemOutlineStroke(series, item));
 531:                 g2.setPaint(getItemOutlinePaint(series, item));
 532:                 g2.draw(areaState.area);
 533:             }
 534:         }
 535: 
 536:         updateCrosshairValues(
 537:             crosshairState, x1, y1, transX1, transY1, orientation
 538:         );
 539:         
 540:         // collect entity and tool tip information...
 541:         if (state.getInfo() != null) {
 542:             EntityCollection entities = state.getEntityCollection();
 543:             if (entities != null && hotspot != null) {
 544:                 String tip = null;
 545:                 XYToolTipGenerator generator 
 546:                     = getToolTipGenerator(series, item);
 547:                 if (generator != null) {
 548:                     tip = generator.generateToolTip(dataset, series, item);
 549:                 }
 550:                 String url = null;
 551:                 if (getURLGenerator() != null) {
 552:                     url = getURLGenerator().generateURL(dataset, series, item);
 553:                 }
 554:                 XYItemEntity entity = new XYItemEntity(hotspot, dataset, 
 555:                         series, item, tip, url);
 556:                 entities.add(entity);
 557:             }
 558:         }
 559: 
 560:     }
 561: 
 562:     /**
 563:      * Returns a clone of the renderer.
 564:      * 
 565:      * @return A clone.
 566:      * 
 567:      * @throws CloneNotSupportedException  if the renderer cannot be cloned.
 568:      */
 569:     public Object clone() throws CloneNotSupportedException {
 570:         return super.clone();
 571:     }
 572:     
 573:     /**
 574:      * Tests this renderer for equality with an arbitrary object.
 575:      * 
 576:      * @param obj  the object (<code>null</code> permitted).
 577:      * 
 578:      * @return A boolean.
 579:      */
 580:     public boolean equals(Object obj) {
 581:         if (obj == this) {
 582:             return true;   
 583:         }
 584:         if (!(obj instanceof XYAreaRenderer)) {
 585:             return false;   
 586:         }
 587:         XYAreaRenderer that = (XYAreaRenderer) obj;
 588:         if (this.plotArea != that.plotArea) {
 589:             return false;   
 590:         }
 591:         if (this.plotLines != that.plotLines) {
 592:             return false;   
 593:         }
 594:         if (this.plotShapes != that.plotShapes) {
 595:             return false;   
 596:         }
 597:         if (this.showOutline != that.showOutline) {
 598:             return false;   
 599:         }
 600:         if (!ShapeUtilities.equal(this.legendArea, that.legendArea)) {
 601:             return false;   
 602:         }
 603:         return true;
 604:     }
 605:     
 606:     /**
 607:      * Provides serialization support.
 608:      *
 609:      * @param stream  the input stream.
 610:      *
 611:      * @throws IOException  if there is an I/O error.
 612:      * @throws ClassNotFoundException  if there is a classpath problem.
 613:      */
 614:     private void readObject(ObjectInputStream stream) 
 615:             throws IOException, ClassNotFoundException {
 616:         stream.defaultReadObject();
 617:         this.legendArea = SerialUtilities.readShape(stream);
 618:     }
 619:     
 620:     /**
 621:      * Provides serialization support.
 622:      *
 623:      * @param stream  the output stream.
 624:      *
 625:      * @throws IOException  if there is an I/O error.
 626:      */
 627:     private void writeObject(ObjectOutputStream stream) throws IOException {
 628:         stream.defaultWriteObject();
 629:         SerialUtilities.writeShape(this.legendArea, stream);
 630:     }
 631: }