001 /* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2008, 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 * CombinedDomainXYPlot.java
029 * -------------------------
030 * (C) Copyright 2001-2008, by Bill Kelemen and Contributors.
031 *
032 * Original Author: Bill Kelemen;
033 * Contributor(s): David Gilbert (for Object Refinery Limited);
034 * Anthony Boulestreau;
035 * David Basten;
036 * Kevin Frechette (for ISTI);
037 * Nicolas Brodu;
038 * Petr Kubanek (bug 1606205);
039 *
040 * Changes:
041 * --------
042 * 06-Dec-2001 : Version 1 (BK);
043 * 12-Dec-2001 : Removed unnecessary 'throws' clause from constructor (DG);
044 * 18-Dec-2001 : Added plotArea attribute and get/set methods (BK);
045 * 22-Dec-2001 : Fixed bug in chartChanged with multiple combinations of
046 * CombinedPlots (BK);
047 * 08-Jan-2002 : Moved to new package com.jrefinery.chart.combination (DG);
048 * 25-Feb-2002 : Updated import statements (DG);
049 * 28-Feb-2002 : Readded "this.plotArea = plotArea" that was deleted from
050 * draw() method (BK);
051 * 26-Mar-2002 : Added an empty zoom method (this method needs to be written so
052 * that combined plots will support zooming (DG);
053 * 29-Mar-2002 : Changed the method createCombinedAxis adding the creation of
054 * OverlaidSymbolicAxis and CombinedSymbolicAxis(AB);
055 * 23-Apr-2002 : Renamed CombinedPlot-->MultiXYPlot, and simplified the
056 * structure (DG);
057 * 23-May-2002 : Renamed (again) MultiXYPlot-->CombinedXYPlot (DG);
058 * 19-Jun-2002 : Added get/setGap() methods suggested by David Basten (DG);
059 * 25-Jun-2002 : Removed redundant imports (DG);
060 * 16-Jul-2002 : Draws shared axis after subplots (to fix missing gridlines),
061 * added overrides of 'setSeriesPaint()' and 'setXYItemRenderer()'
062 * that pass changes down to subplots (KF);
063 * 09-Oct-2002 : Added add(XYPlot) method (DG);
064 * 26-Mar-2003 : Implemented Serializable (DG);
065 * 16-May-2003 : Renamed CombinedXYPlot --> CombinedDomainXYPlot (DG);
066 * 04-Aug-2003 : Removed leftover code that was causing domain axis drawing
067 * problem (DG);
068 * 08-Aug-2003 : Adjusted totalWeight in remove() method (DG);
069 * 21-Aug-2003 : Implemented Cloneable (DG);
070 * 11-Sep-2003 : Fix cloning support (subplots) (NB);
071 * 15-Sep-2003 : Fixed error in cloning (DG);
072 * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
073 * 17-Sep-2003 : Updated handling of 'clicks' (DG);
074 * 12-Nov-2004 : Implemented the new Zoomable interface (DG);
075 * 25-Nov-2004 : Small update to clone() implementation (DG);
076 * 21-Feb-2005 : The getLegendItems() method now returns the fixed legend
077 * items if set (DG);
078 * 05-May-2005 : Removed unused draw() method (DG);
079 * ------------- JFREECHART 1.0.x ---------------------------------------------
080 * 23-Aug-2006 : Override setFixedRangeAxisSpace() to update subplots (DG);
081 * 06-Feb-2007 : Fixed bug 1606205, draw shared axis after subplots (DG);
082 * 23-Mar-2007 : Reverted previous patch (bug fix 1606205) (DG);
083 * 17-Apr-2007 : Added null argument checks to findSubplot() (DG);
084 * 27-Nov-2007 : Modified setFixedRangeAxisSpaceForSubplots() so as not to
085 * trigger change event in subplots (DG);
086 * 28-Jan-2008 : Reset fixed range axis space in subplots for each call to
087 * draw() (DG);
088 * 27-Mar-2008 : Add documentation for getDataRange() method (DG);
089 * 31-Mar-2008 : Updated getSubplots() to return EMPTY_LIST for null
090 * subplots, as suggested by Richard West (DG);
091 * 28-Apr-2008 : Fixed zooming problem (see bug 1950037) (DG);
092 *
093 */
094
095 package org.jfree.chart.plot;
096
097 import java.awt.Graphics2D;
098 import java.awt.geom.Point2D;
099 import java.awt.geom.Rectangle2D;
100 import java.util.Collections;
101 import java.util.Iterator;
102 import java.util.List;
103
104 import org.jfree.chart.LegendItemCollection;
105 import org.jfree.chart.axis.AxisSpace;
106 import org.jfree.chart.axis.AxisState;
107 import org.jfree.chart.axis.NumberAxis;
108 import org.jfree.chart.axis.ValueAxis;
109 import org.jfree.chart.event.PlotChangeEvent;
110 import org.jfree.chart.event.PlotChangeListener;
111 import org.jfree.chart.renderer.xy.XYItemRenderer;
112 import org.jfree.data.Range;
113 import org.jfree.ui.RectangleEdge;
114 import org.jfree.ui.RectangleInsets;
115 import org.jfree.util.ObjectUtilities;
116
117 /**
118 * An extension of {@link XYPlot} that contains multiple subplots that share a
119 * common domain axis.
120 */
121 public class CombinedDomainXYPlot extends XYPlot
122 implements PlotChangeListener {
123
124 /** For serialization. */
125 private static final long serialVersionUID = -7765545541261907383L;
126
127 /** Storage for the subplot references. */
128 private List subplots;
129
130 /** Total weight of all charts. */
131 private int totalWeight = 0;
132
133 /** The gap between subplots. */
134 private double gap = 5.0;
135
136 /** Temporary storage for the subplot areas. */
137 private transient Rectangle2D[] subplotAreas;
138 // TODO: the subplot areas needs to be moved out of the plot into the plot
139 // state
140
141 /**
142 * Default constructor.
143 */
144 public CombinedDomainXYPlot() {
145 this(new NumberAxis());
146 }
147
148 /**
149 * Creates a new combined plot that shares a domain axis among multiple
150 * subplots.
151 *
152 * @param domainAxis the shared axis.
153 */
154 public CombinedDomainXYPlot(ValueAxis domainAxis) {
155
156 super(
157 null, // no data in the parent plot
158 domainAxis,
159 null, // no range axis
160 null // no rendereer
161 );
162
163 this.subplots = new java.util.ArrayList();
164
165 }
166
167 /**
168 * Returns a string describing the type of plot.
169 *
170 * @return The type of plot.
171 */
172 public String getPlotType() {
173 return "Combined_Domain_XYPlot";
174 }
175
176 /**
177 * Sets the orientation for the plot (also changes the orientation for all
178 * the subplots to match).
179 *
180 * @param orientation the orientation (<code>null</code> not allowed).
181 */
182 public void setOrientation(PlotOrientation orientation) {
183
184 super.setOrientation(orientation);
185 Iterator iterator = this.subplots.iterator();
186 while (iterator.hasNext()) {
187 XYPlot plot = (XYPlot) iterator.next();
188 plot.setOrientation(orientation);
189 }
190
191 }
192
193 /**
194 * Returns a range representing the extent of the data values in this plot
195 * (obtained from the subplots) that will be rendered against the specified
196 * axis. NOTE: This method is intended for internal JFreeChart use, and
197 * is public only so that code in the axis classes can call it. Since
198 * only the domain axis is shared between subplots, the JFreeChart code
199 * will only call this method for the domain values (although this is not
200 * checked/enforced).
201 *
202 * @param axis the axis.
203 *
204 * @return The range (possibly <code>null</code>).
205 */
206 public Range getDataRange(ValueAxis axis) {
207 Range result = null;
208 if (this.subplots != null) {
209 Iterator iterator = this.subplots.iterator();
210 while (iterator.hasNext()) {
211 XYPlot subplot = (XYPlot) iterator.next();
212 result = Range.combine(result, subplot.getDataRange(axis));
213 }
214 }
215 return result;
216 }
217
218 /**
219 * Returns the gap between subplots, measured in Java2D units.
220 *
221 * @return The gap (in Java2D units).
222 */
223 public double getGap() {
224 return this.gap;
225 }
226
227 /**
228 * Sets the amount of space between subplots and sends a
229 * {@link PlotChangeEvent} to all registered listeners.
230 *
231 * @param gap the gap between subplots (in Java2D units).
232 */
233 public void setGap(double gap) {
234 this.gap = gap;
235 fireChangeEvent();
236 }
237
238 /**
239 * Adds a subplot (with a default 'weight' of 1) and sends a
240 * {@link PlotChangeEvent} to all registered listeners.
241 * <P>
242 * The domain axis for the subplot will be set to <code>null</code>. You
243 * must ensure that the subplot has a non-null range axis.
244 *
245 * @param subplot the subplot (<code>null</code> not permitted).
246 */
247 public void add(XYPlot subplot) {
248 // defer argument checking
249 add(subplot, 1);
250 }
251
252 /**
253 * Adds a subplot with the specified weight and sends a
254 * {@link PlotChangeEvent} to all registered listeners. The weight
255 * determines how much space is allocated to the subplot relative to all
256 * the other subplots.
257 * <P>
258 * The domain axis for the subplot will be set to <code>null</code>. You
259 * must ensure that the subplot has a non-null range axis.
260 *
261 * @param subplot the subplot (<code>null</code> not permitted).
262 * @param weight the weight (must be >= 1).
263 */
264 public void add(XYPlot subplot, int weight) {
265
266 if (subplot == null) {
267 throw new IllegalArgumentException("Null 'subplot' argument.");
268 }
269 if (weight <= 0) {
270 throw new IllegalArgumentException("Require weight >= 1.");
271 }
272
273 // store the plot and its weight
274 subplot.setParent(this);
275 subplot.setWeight(weight);
276 subplot.setInsets(new RectangleInsets(0.0, 0.0, 0.0, 0.0), false);
277 subplot.setDomainAxis(null);
278 subplot.addChangeListener(this);
279 this.subplots.add(subplot);
280
281 // keep track of total weights
282 this.totalWeight += weight;
283
284 ValueAxis axis = getDomainAxis();
285 if (axis != null) {
286 axis.configure();
287 }
288 fireChangeEvent();
289 }
290
291 /**
292 * Removes a subplot from the combined chart and sends a
293 * {@link PlotChangeEvent} to all registered listeners.
294 *
295 * @param subplot the subplot (<code>null</code> not permitted).
296 */
297 public void remove(XYPlot subplot) {
298 if (subplot == null) {
299 throw new IllegalArgumentException(" Null 'subplot' argument.");
300 }
301 int position = -1;
302 int size = this.subplots.size();
303 int i = 0;
304 while (position == -1 && i < size) {
305 if (this.subplots.get(i) == subplot) {
306 position = i;
307 }
308 i++;
309 }
310 if (position != -1) {
311 this.subplots.remove(position);
312 subplot.setParent(null);
313 subplot.removeChangeListener(this);
314 this.totalWeight -= subplot.getWeight();
315
316 ValueAxis domain = getDomainAxis();
317 if (domain != null) {
318 domain.configure();
319 }
320 fireChangeEvent();
321 }
322 }
323
324 /**
325 * Returns the list of subplots. The returned list may be empty, but is
326 * never <code>null</code>.
327 *
328 * @return An unmodifiable list of subplots.
329 */
330 public List getSubplots() {
331 if (this.subplots != null) {
332 return Collections.unmodifiableList(this.subplots);
333 }
334 else {
335 return Collections.EMPTY_LIST;
336 }
337 }
338
339 /**
340 * Calculates the axis space required.
341 *
342 * @param g2 the graphics device.
343 * @param plotArea the plot area.
344 *
345 * @return The space.
346 */
347 protected AxisSpace calculateAxisSpace(Graphics2D g2,
348 Rectangle2D plotArea) {
349
350 AxisSpace space = new AxisSpace();
351 PlotOrientation orientation = getOrientation();
352
353 // work out the space required by the domain axis...
354 AxisSpace fixed = getFixedDomainAxisSpace();
355 if (fixed != null) {
356 if (orientation == PlotOrientation.HORIZONTAL) {
357 space.setLeft(fixed.getLeft());
358 space.setRight(fixed.getRight());
359 }
360 else if (orientation == PlotOrientation.VERTICAL) {
361 space.setTop(fixed.getTop());
362 space.setBottom(fixed.getBottom());
363 }
364 }
365 else {
366 ValueAxis xAxis = getDomainAxis();
367 RectangleEdge xEdge = Plot.resolveDomainAxisLocation(
368 getDomainAxisLocation(), orientation);
369 if (xAxis != null) {
370 space = xAxis.reserveSpace(g2, this, plotArea, xEdge, space);
371 }
372 }
373
374 Rectangle2D adjustedPlotArea = space.shrink(plotArea, null);
375
376 // work out the maximum height or width of the non-shared axes...
377 int n = this.subplots.size();
378 this.subplotAreas = new Rectangle2D[n];
379 double x = adjustedPlotArea.getX();
380 double y = adjustedPlotArea.getY();
381 double usableSize = 0.0;
382 if (orientation == PlotOrientation.HORIZONTAL) {
383 usableSize = adjustedPlotArea.getWidth() - this.gap * (n - 1);
384 }
385 else if (orientation == PlotOrientation.VERTICAL) {
386 usableSize = adjustedPlotArea.getHeight() - this.gap * (n - 1);
387 }
388
389 for (int i = 0; i < n; i++) {
390 XYPlot plot = (XYPlot) this.subplots.get(i);
391
392 // calculate sub-plot area
393 if (orientation == PlotOrientation.HORIZONTAL) {
394 double w = usableSize * plot.getWeight() / this.totalWeight;
395 this.subplotAreas[i] = new Rectangle2D.Double(x, y, w,
396 adjustedPlotArea.getHeight());
397 x = x + w + this.gap;
398 }
399 else if (orientation == PlotOrientation.VERTICAL) {
400 double h = usableSize * plot.getWeight() / this.totalWeight;
401 this.subplotAreas[i] = new Rectangle2D.Double(x, y,
402 adjustedPlotArea.getWidth(), h);
403 y = y + h + this.gap;
404 }
405
406 AxisSpace subSpace = plot.calculateRangeAxisSpace(g2,
407 this.subplotAreas[i], null);
408 space.ensureAtLeast(subSpace);
409
410 }
411
412 return space;
413 }
414
415 /**
416 * Draws the plot within the specified area on a graphics device.
417 *
418 * @param g2 the graphics device.
419 * @param area the plot area (in Java2D space).
420 * @param anchor an anchor point in Java2D space (<code>null</code>
421 * permitted).
422 * @param parentState the state from the parent plot, if there is one
423 * (<code>null</code> permitted).
424 * @param info collects chart drawing information (<code>null</code>
425 * permitted).
426 */
427 public void draw(Graphics2D g2,
428 Rectangle2D area,
429 Point2D anchor,
430 PlotState parentState,
431 PlotRenderingInfo info) {
432
433 // set up info collection...
434 if (info != null) {
435 info.setPlotArea(area);
436 }
437
438 // adjust the drawing area for plot insets (if any)...
439 RectangleInsets insets = getInsets();
440 insets.trim(area);
441
442 setFixedRangeAxisSpaceForSubplots(null);
443 AxisSpace space = calculateAxisSpace(g2, area);
444 Rectangle2D dataArea = space.shrink(area, null);
445
446 // set the width and height of non-shared axis of all sub-plots
447 setFixedRangeAxisSpaceForSubplots(space);
448
449 // draw the shared axis
450 ValueAxis axis = getDomainAxis();
451 RectangleEdge edge = getDomainAxisEdge();
452 double cursor = RectangleEdge.coordinate(dataArea, edge);
453 AxisState axisState = axis.draw(g2, cursor, area, dataArea, edge, info);
454 if (parentState == null) {
455 parentState = new PlotState();
456 }
457 parentState.getSharedAxisStates().put(axis, axisState);
458
459 // draw all the subplots
460 for (int i = 0; i < this.subplots.size(); i++) {
461 XYPlot plot = (XYPlot) this.subplots.get(i);
462 PlotRenderingInfo subplotInfo = null;
463 if (info != null) {
464 subplotInfo = new PlotRenderingInfo(info.getOwner());
465 info.addSubplotInfo(subplotInfo);
466 }
467 plot.draw(g2, this.subplotAreas[i], anchor, parentState,
468 subplotInfo);
469 }
470
471 if (info != null) {
472 info.setDataArea(dataArea);
473 }
474
475 }
476
477 /**
478 * Returns a collection of legend items for the plot.
479 *
480 * @return The legend items.
481 */
482 public LegendItemCollection getLegendItems() {
483 LegendItemCollection result = getFixedLegendItems();
484 if (result == null) {
485 result = new LegendItemCollection();
486 if (this.subplots != null) {
487 Iterator iterator = this.subplots.iterator();
488 while (iterator.hasNext()) {
489 XYPlot plot = (XYPlot) iterator.next();
490 LegendItemCollection more = plot.getLegendItems();
491 result.addAll(more);
492 }
493 }
494 }
495 return result;
496 }
497
498 /**
499 * Multiplies the range on the range axis/axes by the specified factor.
500 *
501 * @param factor the zoom factor.
502 * @param info the plot rendering info (<code>null</code> not permitted).
503 * @param source the source point (<code>null</code> not permitted).
504 */
505 public void zoomRangeAxes(double factor, PlotRenderingInfo info,
506 Point2D source) {
507 zoomRangeAxes(factor, info, source, false);
508 }
509
510 /**
511 * Multiplies the range on the range axis/axes by the specified factor.
512 *
513 * @param factor the zoom factor.
514 * @param state the plot state.
515 * @param source the source point (in Java2D coordinates).
516 * @param useAnchor use source point as zoom anchor?
517 */
518 public void zoomRangeAxes(double factor, PlotRenderingInfo state,
519 Point2D source, boolean useAnchor) {
520 // delegate 'state' and 'source' argument checks...
521 XYPlot subplot = findSubplot(state, source);
522 if (subplot != null) {
523 subplot.zoomRangeAxes(factor, state, source, useAnchor);
524 }
525 else {
526 // if the source point doesn't fall within a subplot, we do the
527 // zoom on all subplots...
528 Iterator iterator = getSubplots().iterator();
529 while (iterator.hasNext()) {
530 subplot = (XYPlot) iterator.next();
531 subplot.zoomRangeAxes(factor, state, source, useAnchor);
532 }
533 }
534 }
535
536 /**
537 * Zooms in on the range axes.
538 *
539 * @param lowerPercent the lower bound.
540 * @param upperPercent the upper bound.
541 * @param info the plot rendering info (<code>null</code> not permitted).
542 * @param source the source point (<code>null</code> not permitted).
543 */
544 public void zoomRangeAxes(double lowerPercent, double upperPercent,
545 PlotRenderingInfo info, Point2D source) {
546 // delegate 'info' and 'source' argument checks...
547 XYPlot subplot = findSubplot(info, source);
548 if (subplot != null) {
549 subplot.zoomRangeAxes(lowerPercent, upperPercent, info, source);
550 }
551 else {
552 // if the source point doesn't fall within a subplot, we do the
553 // zoom on all subplots...
554 Iterator iterator = getSubplots().iterator();
555 while (iterator.hasNext()) {
556 subplot = (XYPlot) iterator.next();
557 subplot.zoomRangeAxes(lowerPercent, upperPercent, info, source);
558 }
559 }
560 }
561
562 /**
563 * Returns the subplot (if any) that contains the (x, y) point (specified
564 * in Java2D space).
565 *
566 * @param info the chart rendering info (<code>null</code> not permitted).
567 * @param source the source point (<code>null</code> not permitted).
568 *
569 * @return A subplot (possibly <code>null</code>).
570 */
571 public XYPlot findSubplot(PlotRenderingInfo info, Point2D source) {
572 if (info == null) {
573 throw new IllegalArgumentException("Null 'info' argument.");
574 }
575 if (source == null) {
576 throw new IllegalArgumentException("Null 'source' argument.");
577 }
578 XYPlot result = null;
579 int subplotIndex = info.getSubplotIndex(source);
580 if (subplotIndex >= 0) {
581 result = (XYPlot) this.subplots.get(subplotIndex);
582 }
583 return result;
584 }
585
586 /**
587 * Sets the item renderer FOR ALL SUBPLOTS. Registered listeners are
588 * notified that the plot has been modified.
589 * <P>
590 * Note: usually you will want to set the renderer independently for each
591 * subplot, which is NOT what this method does.
592 *
593 * @param renderer the new renderer.
594 */
595 public void setRenderer(XYItemRenderer renderer) {
596
597 super.setRenderer(renderer); // not strictly necessary, since the
598 // renderer set for the
599 // parent plot is not used
600
601 Iterator iterator = this.subplots.iterator();
602 while (iterator.hasNext()) {
603 XYPlot plot = (XYPlot) iterator.next();
604 plot.setRenderer(renderer);
605 }
606
607 }
608
609 /**
610 * Sets the fixed range axis space and sends a {@link PlotChangeEvent} to
611 * all registered listeners.
612 *
613 * @param space the space (<code>null</code> permitted).
614 */
615 public void setFixedRangeAxisSpace(AxisSpace space) {
616 super.setFixedRangeAxisSpace(space);
617 setFixedRangeAxisSpaceForSubplots(space);
618 fireChangeEvent();
619 }
620
621 /**
622 * Sets the size (width or height, depending on the orientation of the
623 * plot) for the domain axis of each subplot.
624 *
625 * @param space the space.
626 */
627 protected void setFixedRangeAxisSpaceForSubplots(AxisSpace space) {
628 Iterator iterator = this.subplots.iterator();
629 while (iterator.hasNext()) {
630 XYPlot plot = (XYPlot) iterator.next();
631 plot.setFixedRangeAxisSpace(space, false);
632 }
633 }
634
635 /**
636 * Handles a 'click' on the plot by updating the anchor values.
637 *
638 * @param x x-coordinate, where the click occured.
639 * @param y y-coordinate, where the click occured.
640 * @param info object containing information about the plot dimensions.
641 */
642 public void handleClick(int x, int y, PlotRenderingInfo info) {
643 Rectangle2D dataArea = info.getDataArea();
644 if (dataArea.contains(x, y)) {
645 for (int i = 0; i < this.subplots.size(); i++) {
646 XYPlot subplot = (XYPlot) this.subplots.get(i);
647 PlotRenderingInfo subplotInfo = info.getSubplotInfo(i);
648 subplot.handleClick(x, y, subplotInfo);
649 }
650 }
651 }
652
653 /**
654 * Receives a {@link PlotChangeEvent} and responds by notifying all
655 * listeners.
656 *
657 * @param event the event.
658 */
659 public void plotChanged(PlotChangeEvent event) {
660 notifyListeners(event);
661 }
662
663 /**
664 * Tests this plot for equality with another object.
665 *
666 * @param obj the other object.
667 *
668 * @return <code>true</code> or <code>false</code>.
669 */
670 public boolean equals(Object obj) {
671
672 if (obj == null) {
673 return false;
674 }
675
676 if (obj == this) {
677 return true;
678 }
679
680 if (!(obj instanceof CombinedDomainXYPlot)) {
681 return false;
682 }
683 if (!super.equals(obj)) {
684 return false;
685 }
686
687 CombinedDomainXYPlot p = (CombinedDomainXYPlot) obj;
688 if (this.totalWeight != p.totalWeight) {
689 return false;
690 }
691 if (this.gap != p.gap) {
692 return false;
693 }
694 if (!ObjectUtilities.equal(this.subplots, p.subplots)) {
695 return false;
696 }
697
698 return true;
699 }
700
701 /**
702 * Returns a clone of the annotation.
703 *
704 * @return A clone.
705 *
706 * @throws CloneNotSupportedException this class will not throw this
707 * exception, but subclasses (if any) might.
708 */
709 public Object clone() throws CloneNotSupportedException {
710
711 CombinedDomainXYPlot result = (CombinedDomainXYPlot) super.clone();
712 result.subplots = (List) ObjectUtilities.deepClone(this.subplots);
713 for (Iterator it = result.subplots.iterator(); it.hasNext();) {
714 Plot child = (Plot) it.next();
715 child.setParent(result);
716 }
717
718 // after setting up all the subplots, the shared domain axis may need
719 // reconfiguring
720 ValueAxis domainAxis = result.getDomainAxis();
721 if (domainAxis != null) {
722 domainAxis.configure();
723 }
724
725 return result;
726
727 }
728
729 }