Source for org.jfree.chart.plot.CombinedDomainXYPlot

   1: /* ===========================================================
   2:  * JFreeChart : a free chart library for the Java(tm) platform
   3:  * ===========================================================
   4:  *
   5:  * (C) Copyright 2000-2007, 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:  * CombinedDomainXYPlot.java
  29:  * -------------------------
  30:  * (C) Copyright 2001-2007, by Bill Kelemen and Contributors.
  31:  *
  32:  * Original Author:  Bill Kelemen;
  33:  * Contributor(s):   David Gilbert (for Object Refinery Limited);
  34:  *                   Anthony Boulestreau;
  35:  *                   David Basten;
  36:  *                   Kevin Frechette (for ISTI);
  37:  *                   Nicolas Brodu;
  38:  *                   Petr Kubanek (bug 1606205);
  39:  *
  40:  * Changes:
  41:  * --------
  42:  * 06-Dec-2001 : Version 1 (BK);
  43:  * 12-Dec-2001 : Removed unnecessary 'throws' clause from constructor (DG);
  44:  * 18-Dec-2001 : Added plotArea attribute and get/set methods (BK);
  45:  * 22-Dec-2001 : Fixed bug in chartChanged with multiple combinations of 
  46:  *               CombinedPlots (BK);
  47:  * 08-Jan-2002 : Moved to new package com.jrefinery.chart.combination (DG);
  48:  * 25-Feb-2002 : Updated import statements (DG);
  49:  * 28-Feb-2002 : Readded "this.plotArea = plotArea" that was deleted from 
  50:  *               draw() method (BK);
  51:  * 26-Mar-2002 : Added an empty zoom method (this method needs to be written so
  52:  *               that combined plots will support zooming (DG);
  53:  * 29-Mar-2002 : Changed the method createCombinedAxis adding the creation of 
  54:  *               OverlaidSymbolicAxis and CombinedSymbolicAxis(AB);
  55:  * 23-Apr-2002 : Renamed CombinedPlot-->MultiXYPlot, and simplified the    
  56:  *               structure (DG);
  57:  * 23-May-2002 : Renamed (again) MultiXYPlot-->CombinedXYPlot (DG);
  58:  * 19-Jun-2002 : Added get/setGap() methods suggested by David Basten (DG);
  59:  * 25-Jun-2002 : Removed redundant imports (DG);
  60:  * 16-Jul-2002 : Draws shared axis after subplots (to fix missing gridlines),
  61:  *               added overrides of 'setSeriesPaint()' and 'setXYItemRenderer()'
  62:  *               that pass changes down to subplots (KF);
  63:  * 09-Oct-2002 : Added add(XYPlot) method (DG);
  64:  * 26-Mar-2003 : Implemented Serializable (DG);
  65:  * 16-May-2003 : Renamed CombinedXYPlot --> CombinedDomainXYPlot (DG);
  66:  * 04-Aug-2003 : Removed leftover code that was causing domain axis drawing 
  67:  *               problem (DG);
  68:  * 08-Aug-2003 : Adjusted totalWeight in remove() method (DG);
  69:  * 21-Aug-2003 : Implemented Cloneable (DG);
  70:  * 11-Sep-2003 : Fix cloning support (subplots) (NB);
  71:  * 15-Sep-2003 : Fixed error in cloning (DG);
  72:  * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
  73:  * 17-Sep-2003 : Updated handling of 'clicks' (DG);
  74:  * 12-Nov-2004 : Implemented the new Zoomable interface (DG);
  75:  * 25-Nov-2004 : Small update to clone() implementation (DG);
  76:  * 21-Feb-2005 : The getLegendItems() method now returns the fixed legend
  77:  *               items if set (DG);
  78:  * 05-May-2005 : Removed unused draw() method (DG);
  79:  * ------------- JFREECHART 1.0.x ---------------------------------------------
  80:  * 23-Aug-2006 : Override setFixedRangeAxisSpace() to update subplots (DG);
  81:  * 06-Feb-2007 : Fixed bug 1606205, draw shared axis after subplots (DG);
  82:  * 23-Mar-2007 : Reverted previous patch (bug fix 1606205) (DG);
  83:  * 17-Apr-2007 : Added null argument checks to findSubplot() (DG);
  84:  *
  85:  */
  86: 
  87: package org.jfree.chart.plot;
  88: 
  89: import java.awt.Graphics2D;
  90: import java.awt.geom.Point2D;
  91: import java.awt.geom.Rectangle2D;
  92: import java.io.Serializable;
  93: import java.util.Collections;
  94: import java.util.Iterator;
  95: import java.util.List;
  96: 
  97: import org.jfree.chart.LegendItemCollection;
  98: import org.jfree.chart.axis.AxisSpace;
  99: import org.jfree.chart.axis.AxisState;
 100: import org.jfree.chart.axis.NumberAxis;
 101: import org.jfree.chart.axis.ValueAxis;
 102: import org.jfree.chart.event.PlotChangeEvent;
 103: import org.jfree.chart.event.PlotChangeListener;
 104: import org.jfree.chart.renderer.xy.XYItemRenderer;
 105: import org.jfree.data.Range;
 106: import org.jfree.ui.RectangleEdge;
 107: import org.jfree.ui.RectangleInsets;
 108: import org.jfree.util.ObjectUtilities;
 109: import org.jfree.util.PublicCloneable;
 110: 
 111: /**
 112:  * An extension of {@link XYPlot} that contains multiple subplots that share a 
 113:  * common domain axis.
 114:  */
 115: public class CombinedDomainXYPlot extends XYPlot 
 116:                                   implements Cloneable, PublicCloneable, 
 117:                                              Serializable,
 118:                                              PlotChangeListener {
 119: 
 120:     /** For serialization. */
 121:     private static final long serialVersionUID = -7765545541261907383L;
 122:     
 123:     /** Storage for the subplot references. */
 124:     private List subplots;
 125: 
 126:     /** Total weight of all charts. */
 127:     private int totalWeight = 0;
 128: 
 129:     /** The gap between subplots. */
 130:     private double gap = 5.0;
 131: 
 132:     /** Temporary storage for the subplot areas. */
 133:     private transient Rectangle2D[] subplotAreas;
 134:     // TODO:  the subplot areas needs to be moved out of the plot into the plot
 135:     //        state
 136:     
 137:     /**
 138:      * Default constructor.
 139:      */
 140:     public CombinedDomainXYPlot() {
 141:         this(new NumberAxis());      
 142:     }
 143:     
 144:     /**
 145:      * Creates a new combined plot that shares a domain axis among multiple 
 146:      * subplots.
 147:      *
 148:      * @param domainAxis  the shared axis.
 149:      */
 150:     public CombinedDomainXYPlot(ValueAxis domainAxis) {
 151: 
 152:         super(
 153:             null,        // no data in the parent plot
 154:             domainAxis,
 155:             null,        // no range axis
 156:             null         // no rendereer
 157:         );  
 158: 
 159:         this.subplots = new java.util.ArrayList();
 160: 
 161:     }
 162: 
 163:     /**
 164:      * Returns a string describing the type of plot.
 165:      *
 166:      * @return The type of plot.
 167:      */
 168:     public String getPlotType() {
 169:         return "Combined_Domain_XYPlot";
 170:     }
 171: 
 172:     /**
 173:      * Sets the orientation for the plot (also changes the orientation for all 
 174:      * the subplots to match).
 175:      * 
 176:      * @param orientation  the orientation (<code>null</code> not allowed).
 177:      */
 178:     public void setOrientation(PlotOrientation orientation) {
 179: 
 180:         super.setOrientation(orientation);
 181:         Iterator iterator = this.subplots.iterator();
 182:         while (iterator.hasNext()) {
 183:             XYPlot plot = (XYPlot) iterator.next();
 184:             plot.setOrientation(orientation);
 185:         }
 186: 
 187:     }
 188: 
 189:     /**
 190:      * Returns the range for the specified axis.  This is the combined range 
 191:      * of all the subplots.
 192:      *
 193:      * @param axis  the axis.
 194:      *
 195:      * @return The range (possibly <code>null</code>).
 196:      */
 197:     public Range getDataRange(ValueAxis axis) {
 198: 
 199:         Range result = null;
 200:         if (this.subplots != null) {
 201:             Iterator iterator = this.subplots.iterator();
 202:             while (iterator.hasNext()) {
 203:                 XYPlot subplot = (XYPlot) iterator.next();
 204:                 result = Range.combine(result, subplot.getDataRange(axis));
 205:             }
 206:         }
 207:         return result;
 208: 
 209:     }
 210: 
 211:     /**
 212:      * Returns the gap between subplots, measured in Java2D units.
 213:      *
 214:      * @return The gap (in Java2D units).
 215:      */
 216:     public double getGap() {
 217:         return this.gap;
 218:     }
 219: 
 220:     /**
 221:      * Sets the amount of space between subplots and sends a 
 222:      * {@link PlotChangeEvent} to all registered listeners.
 223:      *
 224:      * @param gap  the gap between subplots (in Java2D units).
 225:      */
 226:     public void setGap(double gap) {
 227:         this.gap = gap;
 228:         notifyListeners(new PlotChangeEvent(this));
 229:     }
 230: 
 231:     /**
 232:      * Adds a subplot (with a default 'weight' of 1) and sends a 
 233:      * {@link PlotChangeEvent} to all registered listeners.
 234:      * <P>
 235:      * The domain axis for the subplot will be set to <code>null</code>.  You
 236:      * must ensure that the subplot has a non-null range axis.
 237:      *
 238:      * @param subplot  the subplot (<code>null</code> not permitted).
 239:      */
 240:     public void add(XYPlot subplot) {
 241:         // defer argument checking
 242:         add(subplot, 1);
 243:     }
 244: 
 245:     /**
 246:      * Adds a subplot with the specified weight and sends a 
 247:      * {@link PlotChangeEvent} to all registered listeners.  The weight 
 248:      * determines how much space is allocated to the subplot relative to all 
 249:      * the other subplots.
 250:      * <P>
 251:      * The domain axis for the subplot will be set to <code>null</code>.  You
 252:      * must ensure that the subplot has a non-null range axis.
 253:      *
 254:      * @param subplot  the subplot (<code>null</code> not permitted).
 255:      * @param weight  the weight (must be >= 1).
 256:      */
 257:     public void add(XYPlot subplot, int weight) {
 258: 
 259:         if (subplot == null) {
 260:             throw new IllegalArgumentException("Null 'subplot' argument.");
 261:         }
 262:         if (weight <= 0) {
 263:             throw new IllegalArgumentException("Require weight >= 1.");
 264:         }
 265: 
 266:         // store the plot and its weight
 267:         subplot.setParent(this);
 268:         subplot.setWeight(weight);
 269:         subplot.setInsets(new RectangleInsets(0.0, 0.0, 0.0, 0.0), false);
 270:         subplot.setDomainAxis(null);
 271:         subplot.addChangeListener(this);
 272:         this.subplots.add(subplot);
 273: 
 274:         // keep track of total weights
 275:         this.totalWeight += weight;
 276: 
 277:         ValueAxis axis = getDomainAxis();
 278:         if (axis != null) {
 279:             axis.configure();
 280:         }
 281:         
 282:         notifyListeners(new PlotChangeEvent(this));
 283: 
 284:     }
 285: 
 286:     /**
 287:      * Removes a subplot from the combined chart and sends a 
 288:      * {@link PlotChangeEvent} to all registered listeners.
 289:      *
 290:      * @param subplot  the subplot (<code>null</code> not permitted).
 291:      */
 292:     public void remove(XYPlot subplot) {
 293:         if (subplot == null) {
 294:             throw new IllegalArgumentException(" Null 'subplot' argument.");   
 295:         }
 296:         int position = -1;
 297:         int size = this.subplots.size();
 298:         int i = 0;
 299:         while (position == -1 && i < size) {
 300:             if (this.subplots.get(i) == subplot) {
 301:                 position = i;
 302:             }
 303:             i++;
 304:         }
 305:         if (position != -1) {
 306:             this.subplots.remove(position);
 307:             subplot.setParent(null);
 308:             subplot.removeChangeListener(this);
 309:             this.totalWeight -= subplot.getWeight();
 310: 
 311:             ValueAxis domain = getDomainAxis();
 312:             if (domain != null) {
 313:                 domain.configure();
 314:             }
 315:             notifyListeners(new PlotChangeEvent(this));
 316:         }
 317:     }
 318: 
 319:     /**
 320:      * Returns the list of subplots.
 321:      *
 322:      * @return An unmodifiable list of subplots.
 323:      */
 324:     public List getSubplots() {
 325:         return Collections.unmodifiableList(this.subplots);
 326:     }
 327: 
 328:     /**
 329:      * Calculates the axis space required.
 330:      * 
 331:      * @param g2  the graphics device.
 332:      * @param plotArea  the plot area.
 333:      * 
 334:      * @return The space.
 335:      */
 336:     protected AxisSpace calculateAxisSpace(Graphics2D g2, 
 337:                                            Rectangle2D plotArea) {
 338:         
 339:         AxisSpace space = new AxisSpace();
 340:         PlotOrientation orientation = getOrientation();
 341:         
 342:         // work out the space required by the domain axis...
 343:         AxisSpace fixed = getFixedDomainAxisSpace();
 344:         if (fixed != null) {
 345:             if (orientation == PlotOrientation.HORIZONTAL) {
 346:                 space.setLeft(fixed.getLeft());
 347:                 space.setRight(fixed.getRight());
 348:             }
 349:             else if (orientation == PlotOrientation.VERTICAL) {
 350:                 space.setTop(fixed.getTop());
 351:                 space.setBottom(fixed.getBottom());                
 352:             }
 353:         }
 354:         else {
 355:             ValueAxis xAxis = getDomainAxis();
 356:             RectangleEdge xEdge = Plot.resolveDomainAxisLocation(
 357:                     getDomainAxisLocation(), orientation);
 358:             if (xAxis != null) {
 359:                 space = xAxis.reserveSpace(g2, this, plotArea, xEdge, space);
 360:             }
 361:         }
 362:         
 363:         Rectangle2D adjustedPlotArea = space.shrink(plotArea, null);
 364:         
 365:         // work out the maximum height or width of the non-shared axes...
 366:         int n = this.subplots.size();
 367:         this.subplotAreas = new Rectangle2D[n];
 368:         double x = adjustedPlotArea.getX();
 369:         double y = adjustedPlotArea.getY();
 370:         double usableSize = 0.0;
 371:         if (orientation == PlotOrientation.HORIZONTAL) {
 372:             usableSize = adjustedPlotArea.getWidth() - this.gap * (n - 1);
 373:         }
 374:         else if (orientation == PlotOrientation.VERTICAL) {
 375:             usableSize = adjustedPlotArea.getHeight() - this.gap * (n - 1);
 376:         }
 377: 
 378:         for (int i = 0; i < n; i++) {
 379:             XYPlot plot = (XYPlot) this.subplots.get(i);
 380: 
 381:             // calculate sub-plot area
 382:             if (orientation == PlotOrientation.HORIZONTAL) {
 383:                 double w = usableSize * plot.getWeight() / this.totalWeight;
 384:                 this.subplotAreas[i] = new Rectangle2D.Double(x, y, w, 
 385:                         adjustedPlotArea.getHeight());
 386:                 x = x + w + this.gap;
 387:             }
 388:             else if (orientation == PlotOrientation.VERTICAL) {
 389:                 double h = usableSize * plot.getWeight() / this.totalWeight;
 390:                 this.subplotAreas[i] = new Rectangle2D.Double(x, y, 
 391:                         adjustedPlotArea.getWidth(), h);
 392:                 y = y + h + this.gap;
 393:             }
 394: 
 395:             AxisSpace subSpace = plot.calculateRangeAxisSpace(g2, 
 396:                     this.subplotAreas[i], null);
 397:             space.ensureAtLeast(subSpace);
 398: 
 399:         }
 400: 
 401:         return space;
 402:     }
 403:     
 404:     /**
 405:      * Draws the plot within the specified area on a graphics device.
 406:      * 
 407:      * @param g2  the graphics device.
 408:      * @param area  the plot area (in Java2D space).
 409:      * @param anchor  an anchor point in Java2D space (<code>null</code> 
 410:      *                permitted).
 411:      * @param parentState  the state from the parent plot, if there is one 
 412:      *                     (<code>null</code> permitted).
 413:      * @param info  collects chart drawing information (<code>null</code> 
 414:      *              permitted).
 415:      */
 416:     public void draw(Graphics2D g2,
 417:                      Rectangle2D area,
 418:                      Point2D anchor,
 419:                      PlotState parentState,
 420:                      PlotRenderingInfo info) {
 421:         
 422:         // set up info collection...
 423:         if (info != null) {
 424:             info.setPlotArea(area);
 425:         }
 426: 
 427:         // adjust the drawing area for plot insets (if any)...
 428:         RectangleInsets insets = getInsets();
 429:         insets.trim(area);
 430: 
 431:         AxisSpace space = calculateAxisSpace(g2, area);
 432:         Rectangle2D dataArea = space.shrink(area, null);
 433: 
 434:         // set the width and height of non-shared axis of all sub-plots
 435:         setFixedRangeAxisSpaceForSubplots(space);
 436: 
 437:         // draw the shared axis
 438:         ValueAxis axis = getDomainAxis();
 439:         RectangleEdge edge = getDomainAxisEdge();
 440:         double cursor = RectangleEdge.coordinate(dataArea, edge);
 441:         AxisState axisState = axis.draw(g2, cursor, area, dataArea, edge, info);
 442:         if (parentState == null) {
 443:             parentState = new PlotState();
 444:         }
 445:         parentState.getSharedAxisStates().put(axis, axisState);
 446:         
 447:         // draw all the subplots
 448:         for (int i = 0; i < this.subplots.size(); i++) {
 449:             XYPlot plot = (XYPlot) this.subplots.get(i);
 450:             PlotRenderingInfo subplotInfo = null;
 451:             if (info != null) {
 452:                 subplotInfo = new PlotRenderingInfo(info.getOwner());
 453:                 info.addSubplotInfo(subplotInfo);
 454:             }
 455:             plot.draw(g2, this.subplotAreas[i], anchor, parentState, 
 456:                     subplotInfo);
 457:         }
 458: 
 459:         if (info != null) {
 460:             info.setDataArea(dataArea);
 461:         }
 462:         
 463:     }
 464: 
 465:     /**
 466:      * Returns a collection of legend items for the plot.
 467:      *
 468:      * @return The legend items.
 469:      */
 470:     public LegendItemCollection getLegendItems() {        
 471:         LegendItemCollection result = getFixedLegendItems();
 472:         if (result == null) {
 473:             result = new LegendItemCollection();
 474:             if (this.subplots != null) {
 475:                 Iterator iterator = this.subplots.iterator();
 476:                 while (iterator.hasNext()) {
 477:                     XYPlot plot = (XYPlot) iterator.next();
 478:                     LegendItemCollection more = plot.getLegendItems();
 479:                     result.addAll(more);
 480:                 }
 481:             }
 482:         }
 483:         return result;
 484:     }
 485: 
 486:     /**
 487:      * Multiplies the range on the range axis/axes by the specified factor.
 488:      *
 489:      * @param factor  the zoom factor.
 490:      * @param info  the plot rendering info (<code>null</code> not permitted).
 491:      * @param source  the source point (<code>null</code> not permitted).
 492:      */
 493:     public void zoomRangeAxes(double factor, PlotRenderingInfo info, 
 494:                               Point2D source) {
 495:         // delegate 'info' and 'source' argument checks...
 496:         XYPlot subplot = findSubplot(info, source);
 497:         if (subplot != null) {
 498:             subplot.zoomRangeAxes(factor, info, source);
 499:         }
 500:         else {
 501:             // if the source point doesn't fall within a subplot, we do the
 502:             // zoom on all subplots...
 503:             Iterator iterator = getSubplots().iterator();
 504:             while (iterator.hasNext()) {
 505:                 subplot = (XYPlot) iterator.next();
 506:                 subplot.zoomRangeAxes(factor, info, source);
 507:             }
 508:         }
 509:     }
 510: 
 511:     /**
 512:      * Zooms in on the range axes.
 513:      *
 514:      * @param lowerPercent  the lower bound.
 515:      * @param upperPercent  the upper bound.
 516:      * @param info  the plot rendering info (<code>null</code> not permitted).
 517:      * @param source  the source point (<code>null</code> not permitted).
 518:      */
 519:     public void zoomRangeAxes(double lowerPercent, double upperPercent, 
 520:                               PlotRenderingInfo info, Point2D source) {
 521:         // delegate 'info' and 'source' argument checks...
 522:         XYPlot subplot = findSubplot(info, source);
 523:         if (subplot != null) {
 524:             subplot.zoomRangeAxes(lowerPercent, upperPercent, info, source);
 525:         }
 526:         else {
 527:             // if the source point doesn't fall within a subplot, we do the
 528:             // zoom on all subplots...
 529:             Iterator iterator = getSubplots().iterator();
 530:             while (iterator.hasNext()) {
 531:                 subplot = (XYPlot) iterator.next();
 532:                 subplot.zoomRangeAxes(lowerPercent, upperPercent, info, source);
 533:             }
 534:         }
 535:     }
 536: 
 537:     /**
 538:      * Returns the subplot (if any) that contains the (x, y) point (specified 
 539:      * in Java2D space).
 540:      * 
 541:      * @param info  the chart rendering info (<code>null</code> not permitted).
 542:      * @param source  the source point (<code>null</code> not permitted).
 543:      * 
 544:      * @return A subplot (possibly <code>null</code>).
 545:      */
 546:     public XYPlot findSubplot(PlotRenderingInfo info, Point2D source) {
 547:         if (info == null) {
 548:             throw new IllegalArgumentException("Null 'info' argument.");
 549:         }
 550:         if (source == null) {
 551:             throw new IllegalArgumentException("Null 'source' argument.");
 552:         }
 553:         XYPlot result = null;
 554:         int subplotIndex = info.getSubplotIndex(source);
 555:         if (subplotIndex >= 0) {
 556:             result =  (XYPlot) this.subplots.get(subplotIndex);
 557:         }
 558:         return result;
 559:     }
 560:     
 561:     /**
 562:      * Sets the item renderer FOR ALL SUBPLOTS.  Registered listeners are 
 563:      * notified that the plot has been modified.
 564:      * <P>
 565:      * Note: usually you will want to set the renderer independently for each 
 566:      * subplot, which is NOT what this method does.
 567:      *
 568:      * @param renderer the new renderer.
 569:      */
 570:     public void setRenderer(XYItemRenderer renderer) {
 571: 
 572:         super.setRenderer(renderer);  // not strictly necessary, since the 
 573:                                       // renderer set for the
 574:                                       // parent plot is not used
 575: 
 576:         Iterator iterator = this.subplots.iterator();
 577:         while (iterator.hasNext()) {
 578:             XYPlot plot = (XYPlot) iterator.next();
 579:             plot.setRenderer(renderer);
 580:         }
 581: 
 582:     }
 583: 
 584:     /**
 585:      * Sets the fixed range axis space.
 586:      *
 587:      * @param space  the space (<code>null</code> permitted).
 588:      */
 589:     public void setFixedRangeAxisSpace(AxisSpace space) {
 590:         super.setFixedRangeAxisSpace(space);
 591:         setFixedRangeAxisSpaceForSubplots(space);
 592:         this.notifyListeners(new PlotChangeEvent(this));
 593:     }
 594:     
 595:     /**
 596:      * Sets the size (width or height, depending on the orientation of the 
 597:      * plot) for the domain axis of each subplot.
 598:      *
 599:      * @param space  the space.
 600:      */
 601:     protected void setFixedRangeAxisSpaceForSubplots(AxisSpace space) {
 602: 
 603:         Iterator iterator = this.subplots.iterator();
 604:         while (iterator.hasNext()) {
 605:             XYPlot plot = (XYPlot) iterator.next();
 606:             plot.setFixedRangeAxisSpace(space);
 607:         }
 608: 
 609:     }
 610: 
 611:     /**
 612:      * Handles a 'click' on the plot by updating the anchor values.
 613:      *
 614:      * @param x  x-coordinate, where the click occured.
 615:      * @param y  y-coordinate, where the click occured.
 616:      * @param info  object containing information about the plot dimensions.
 617:      */
 618:     public void handleClick(int x, int y, PlotRenderingInfo info) {
 619:         Rectangle2D dataArea = info.getDataArea();
 620:         if (dataArea.contains(x, y)) {
 621:             for (int i = 0; i < this.subplots.size(); i++) {
 622:                 XYPlot subplot = (XYPlot) this.subplots.get(i);
 623:                 PlotRenderingInfo subplotInfo = info.getSubplotInfo(i);
 624:                 subplot.handleClick(x, y, subplotInfo);
 625:             }
 626:         }
 627:     }
 628:     
 629:     /**
 630:      * Receives a {@link PlotChangeEvent} and responds by notifying all 
 631:      * listeners.
 632:      * 
 633:      * @param event  the event.
 634:      */
 635:     public void plotChanged(PlotChangeEvent event) {
 636:         notifyListeners(event);
 637:     }
 638: 
 639:     /**
 640:      * Tests this plot for equality with another object.
 641:      *
 642:      * @param obj  the other object.
 643:      *
 644:      * @return <code>true</code> or <code>false</code>.
 645:      */
 646:     public boolean equals(Object obj) {
 647: 
 648:         if (obj == null) {
 649:             return false;
 650:         }
 651: 
 652:         if (obj == this) {
 653:             return true;
 654:         }
 655: 
 656:         if (!(obj instanceof CombinedDomainXYPlot)) {
 657:             return false;
 658:         }
 659:         if (!super.equals(obj)) {
 660:             return false;
 661:         }
 662: 
 663:         CombinedDomainXYPlot p = (CombinedDomainXYPlot) obj;
 664:         if (this.totalWeight != p.totalWeight) {
 665:             return false;
 666:         }
 667:         if (this.gap != p.gap) {
 668:             return false;
 669:         }
 670:         if (!ObjectUtilities.equal(this.subplots, p.subplots)) {
 671:             return false;
 672:         }
 673: 
 674:         return true;
 675:     }
 676:     
 677:     /**
 678:      * Returns a clone of the annotation.
 679:      * 
 680:      * @return A clone.
 681:      * 
 682:      * @throws CloneNotSupportedException  this class will not throw this 
 683:      *         exception, but subclasses (if any) might.
 684:      */
 685:     public Object clone() throws CloneNotSupportedException {
 686:         
 687:         CombinedDomainXYPlot result = (CombinedDomainXYPlot) super.clone(); 
 688:         result.subplots = (List) ObjectUtilities.deepClone(this.subplots);
 689:         for (Iterator it = result.subplots.iterator(); it.hasNext();) {
 690:             Plot child = (Plot) it.next();
 691:             child.setParent(result);
 692:         }
 693:         
 694:         // after setting up all the subplots, the shared domain axis may need 
 695:         // reconfiguring
 696:         ValueAxis domainAxis = result.getDomainAxis();
 697:         if (domainAxis != null) {
 698:             domainAxis.configure();
 699:         }
 700:         
 701:         return result;
 702:         
 703:     }
 704:     
 705: }