001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2009, 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 * Axis.java
029 * ---------
030 * (C) Copyright 2000-2009, by Object Refinery Limited and Contributors.
031 *
032 * Original Author:  David Gilbert (for Object Refinery Limited);
033 * Contributor(s):   Bill Kelemen;
034 *                   Nicolas Brodu;
035 *                   Peter Kolb (patches 1934255 and 2603321);
036 *                   Andrew Mickish (patch 1870189);
037 *
038 * Changes
039 * -------
040 * 21-Aug-2001 : Added standard header, fixed DOS encoding problem (DG);
041 * 18-Sep-2001 : Updated header (DG);
042 * 07-Nov-2001 : Allow null axis labels (DG);
043 *             : Added default font values (DG);
044 * 13-Nov-2001 : Modified the setPlot() method to check compatibility between
045 *               the axis and the plot (DG);
046 * 30-Nov-2001 : Changed default font from "Arial" --> "SansSerif" (DG);
047 * 06-Dec-2001 : Allow null in setPlot() method (BK);
048 * 06-Mar-2002 : Added AxisConstants interface (DG);
049 * 23-Apr-2002 : Added a visible property.  Moved drawVerticalString to
050 *               RefineryUtilities.  Added fixedDimension property for use in
051 *               combined plots (DG);
052 * 25-Jun-2002 : Removed unnecessary imports (DG);
053 * 05-Sep-2002 : Added attribute for tick mark paint (DG);
054 * 18-Sep-2002 : Fixed errors reported by Checkstyle (DG);
055 * 07-Nov-2002 : Added attributes to control the inside and outside length of
056 *               the tick marks (DG);
057 * 08-Nov-2002 : Moved to new package com.jrefinery.chart.axis (DG);
058 * 18-Nov-2002 : Added axis location to refreshTicks() parameters (DG);
059 * 15-Jan-2003 : Removed monolithic constructor (DG);
060 * 17-Jan-2003 : Moved plot classes to separate package (DG);
061 * 26-Mar-2003 : Implemented Serializable (DG);
062 * 03-Jul-2003 : Modified reserveSpace method (DG);
063 * 13-Aug-2003 : Implemented Cloneable (DG);
064 * 11-Sep-2003 : Took care of listeners while cloning (NB);
065 * 29-Oct-2003 : Added workaround for font alignment in PDF output (DG);
066 * 06-Nov-2003 : Modified refreshTicks() signature (DG);
067 * 06-Jan-2004 : Added axis line attributes (DG);
068 * 16-Mar-2004 : Added plot state to draw() method (DG);
069 * 07-Apr-2004 : Modified text bounds calculation (DG);
070 * 18-May-2004 : Eliminated AxisConstants.java (DG);
071 * 30-Sep-2004 : Moved drawRotatedString() from RefineryUtilities -->
072 *               TextUtilities (DG);
073 * 04-Oct-2004 : Modified getLabelEnclosure() method to treat an empty String
074 *               the same way as a null string - see bug 1026521 (DG);
075 * 21-Apr-2005 : Replaced Insets with RectangleInsets (DG);
076 * 26-Apr-2005 : Removed LOGGER (DG);
077 * 01-Jun-2005 : Added hasListener() method for unit testing (DG);
078 * 08-Jun-2005 : Fixed equals() method to handle GradientPaint (DG);
079 * ------------- JFREECHART 1.0.x ---------------------------------------------
080 * 22-Aug-2006 : API doc updates (DG);
081 * 06-Jun-2008 : Added setTickLabelInsets(RectangleInsets, boolean) (DG);
082 * 25-Sep-2008 : Added minor tick support, see patch 1934255 by Peter Kolb (DG);
083 * 26-Sep-2008 : Added fireChangeEvent() method (DG);
084 * 19-Mar-2009 : Added entity support - see patch 2603321 by Peter Kolb (DG);
085 *
086 */
087
088package org.jfree.chart.axis;
089
090import java.awt.BasicStroke;
091import java.awt.Color;
092import java.awt.Font;
093import java.awt.FontMetrics;
094import java.awt.Graphics2D;
095import java.awt.Paint;
096import java.awt.Shape;
097import java.awt.Stroke;
098import java.awt.geom.AffineTransform;
099import java.awt.geom.Line2D;
100import java.awt.geom.Rectangle2D;
101import java.io.IOException;
102import java.io.ObjectInputStream;
103import java.io.ObjectOutputStream;
104import java.io.Serializable;
105import java.util.Arrays;
106import java.util.EventListener;
107import java.util.List;
108
109import javax.swing.event.EventListenerList;
110
111import org.jfree.chart.entity.AxisEntity;
112import org.jfree.chart.entity.EntityCollection;
113import org.jfree.chart.event.AxisChangeEvent;
114import org.jfree.chart.event.AxisChangeListener;
115import org.jfree.chart.plot.Plot;
116import org.jfree.chart.plot.PlotRenderingInfo;
117import org.jfree.io.SerialUtilities;
118import org.jfree.text.TextUtilities;
119import org.jfree.ui.RectangleEdge;
120import org.jfree.ui.RectangleInsets;
121import org.jfree.ui.TextAnchor;
122import org.jfree.util.ObjectUtilities;
123import org.jfree.util.PaintUtilities;
124
125/**
126 * The base class for all axes in JFreeChart.  Subclasses are divided into
127 * those that display values ({@link ValueAxis}) and those that display
128 * categories ({@link CategoryAxis}).
129 */
130public abstract class Axis implements Cloneable, Serializable {
131
132    /** For serialization. */
133    private static final long serialVersionUID = 7719289504573298271L;
134
135    /** The default axis visibility. */
136    public static final boolean DEFAULT_AXIS_VISIBLE = true;
137
138    /** The default axis label font. */
139    public static final Font DEFAULT_AXIS_LABEL_FONT = new Font(
140            "SansSerif", Font.PLAIN, 12);
141
142    /** The default axis label paint. */
143    public static final Paint DEFAULT_AXIS_LABEL_PAINT = Color.black;
144
145    /** The default axis label insets. */
146    public static final RectangleInsets DEFAULT_AXIS_LABEL_INSETS
147            = new RectangleInsets(3.0, 3.0, 3.0, 3.0);
148
149    /** The default axis line paint. */
150    public static final Paint DEFAULT_AXIS_LINE_PAINT = Color.gray;
151
152    /** The default axis line stroke. */
153    public static final Stroke DEFAULT_AXIS_LINE_STROKE = new BasicStroke(1.0f);
154
155    /** The default tick labels visibility. */
156    public static final boolean DEFAULT_TICK_LABELS_VISIBLE = true;
157
158    /** The default tick label font. */
159    public static final Font DEFAULT_TICK_LABEL_FONT = new Font("SansSerif",
160            Font.PLAIN, 10);
161
162    /** The default tick label paint. */
163    public static final Paint DEFAULT_TICK_LABEL_PAINT = Color.black;
164
165    /** The default tick label insets. */
166    public static final RectangleInsets DEFAULT_TICK_LABEL_INSETS
167            = new RectangleInsets(2.0, 4.0, 2.0, 4.0);
168
169    /** The default tick marks visible. */
170    public static final boolean DEFAULT_TICK_MARKS_VISIBLE = true;
171
172    /** The default tick stroke. */
173    public static final Stroke DEFAULT_TICK_MARK_STROKE = new BasicStroke(1);
174
175    /** The default tick paint. */
176    public static final Paint DEFAULT_TICK_MARK_PAINT = Color.gray;
177
178    /** The default tick mark inside length. */
179    public static final float DEFAULT_TICK_MARK_INSIDE_LENGTH = 0.0f;
180
181    /** The default tick mark outside length. */
182    public static final float DEFAULT_TICK_MARK_OUTSIDE_LENGTH = 2.0f;
183
184    /** A flag indicating whether or not the axis is visible. */
185    private boolean visible;
186
187    /** The label for the axis. */
188    private String label;
189
190    /** The font for displaying the axis label. */
191    private Font labelFont;
192
193    /** The paint for drawing the axis label. */
194    private transient Paint labelPaint;
195
196    /** The insets for the axis label. */
197    private RectangleInsets labelInsets;
198
199    /** The label angle. */
200    private double labelAngle;
201
202    /** A flag that controls whether or not the axis line is visible. */
203    private boolean axisLineVisible;
204
205    /** The stroke used for the axis line. */
206    private transient Stroke axisLineStroke;
207
208    /** The paint used for the axis line. */
209    private transient Paint axisLinePaint;
210
211    /**
212     * A flag that indicates whether or not tick labels are visible for the
213     * axis.
214     */
215    private boolean tickLabelsVisible;
216
217    /** The font used to display the tick labels. */
218    private Font tickLabelFont;
219
220    /** The color used to display the tick labels. */
221    private transient Paint tickLabelPaint;
222
223    /** The blank space around each tick label. */
224    private RectangleInsets tickLabelInsets;
225
226    /**
227     * A flag that indicates whether or not major tick marks are visible for
228     * the axis.
229     */
230    private boolean tickMarksVisible;
231
232    /**
233     * The length of the major tick mark inside the data area (zero
234     * permitted).
235     */
236    private float tickMarkInsideLength;
237
238    /**
239     * The length of the major tick mark outside the data area (zero
240     * permitted).
241     */
242    private float tickMarkOutsideLength;
243
244    /**
245     * A flag that indicates whether or not minor tick marks are visible for the
246     * axis.
247     *
248     * @since 1.0.12
249     */
250    private boolean minorTickMarksVisible;
251
252    /**
253     * The length of the minor tick mark inside the data area (zero permitted).
254     *
255     * @since 1.0.12
256     */
257    private float minorTickMarkInsideLength;
258
259    /**
260     * The length of the minor tick mark outside the data area (zero permitted).
261     *
262     * @since 1.0.12
263     */
264    private float minorTickMarkOutsideLength;
265
266    /** The stroke used to draw tick marks. */
267    private transient Stroke tickMarkStroke;
268
269    /** The paint used to draw tick marks. */
270    private transient Paint tickMarkPaint;
271
272    /** The fixed (horizontal or vertical) dimension for the axis. */
273    private double fixedDimension;
274
275    /**
276     * A reference back to the plot that the axis is assigned to (can be
277     * <code>null</code>).
278     */
279    private transient Plot plot;
280
281    /** Storage for registered listeners. */
282    private transient EventListenerList listenerList;
283
284    /**
285     * Constructs an axis, using default values where necessary.
286     *
287     * @param label  the axis label (<code>null</code> permitted).
288     */
289    protected Axis(String label) {
290
291        this.label = label;
292        this.visible = DEFAULT_AXIS_VISIBLE;
293        this.labelFont = DEFAULT_AXIS_LABEL_FONT;
294        this.labelPaint = DEFAULT_AXIS_LABEL_PAINT;
295        this.labelInsets = DEFAULT_AXIS_LABEL_INSETS;
296        this.labelAngle = 0.0;
297
298        this.axisLineVisible = true;
299        this.axisLinePaint = DEFAULT_AXIS_LINE_PAINT;
300        this.axisLineStroke = DEFAULT_AXIS_LINE_STROKE;
301
302        this.tickLabelsVisible = DEFAULT_TICK_LABELS_VISIBLE;
303        this.tickLabelFont = DEFAULT_TICK_LABEL_FONT;
304        this.tickLabelPaint = DEFAULT_TICK_LABEL_PAINT;
305        this.tickLabelInsets = DEFAULT_TICK_LABEL_INSETS;
306
307        this.tickMarksVisible = DEFAULT_TICK_MARKS_VISIBLE;
308        this.tickMarkStroke = DEFAULT_TICK_MARK_STROKE;
309        this.tickMarkPaint = DEFAULT_TICK_MARK_PAINT;
310        this.tickMarkInsideLength = DEFAULT_TICK_MARK_INSIDE_LENGTH;
311        this.tickMarkOutsideLength = DEFAULT_TICK_MARK_OUTSIDE_LENGTH;
312
313        this.minorTickMarksVisible = false;
314        this.minorTickMarkInsideLength = 0.0f;
315        this.minorTickMarkOutsideLength = 2.0f;
316
317        this.plot = null;
318
319        this.listenerList = new EventListenerList();
320
321    }
322
323    /**
324     * Returns <code>true</code> if the axis is visible, and
325     * <code>false</code> otherwise.
326     *
327     * @return A boolean.
328     *
329     * @see #setVisible(boolean)
330     */
331    public boolean isVisible() {
332        return this.visible;
333    }
334
335    /**
336     * Sets a flag that controls whether or not the axis is visible and sends
337     * an {@link AxisChangeEvent} to all registered listeners.
338     *
339     * @param flag  the flag.
340     *
341     * @see #isVisible()
342     */
343    public void setVisible(boolean flag) {
344        if (flag != this.visible) {
345            this.visible = flag;
346            fireChangeEvent();
347        }
348    }
349
350    /**
351     * Returns the label for the axis.
352     *
353     * @return The label for the axis (<code>null</code> possible).
354     *
355     * @see #getLabelFont()
356     * @see #getLabelPaint()
357     * @see #setLabel(String)
358     */
359    public String getLabel() {
360        return this.label;
361    }
362
363    /**
364     * Sets the label for the axis and sends an {@link AxisChangeEvent} to all
365     * registered listeners.
366     *
367     * @param label  the new label (<code>null</code> permitted).
368     *
369     * @see #getLabel()
370     * @see #setLabelFont(Font)
371     * @see #setLabelPaint(Paint)
372     */
373    public void setLabel(String label) {
374
375        String existing = this.label;
376        if (existing != null) {
377            if (!existing.equals(label)) {
378                this.label = label;
379                fireChangeEvent();
380            }
381        }
382        else {
383            if (label != null) {
384                this.label = label;
385                fireChangeEvent();
386            }
387        }
388
389    }
390
391    /**
392     * Returns the font for the axis label.
393     *
394     * @return The font (never <code>null</code>).
395     *
396     * @see #setLabelFont(Font)
397     */
398    public Font getLabelFont() {
399        return this.labelFont;
400    }
401
402    /**
403     * Sets the font for the axis label and sends an {@link AxisChangeEvent}
404     * to all registered listeners.
405     *
406     * @param font  the font (<code>null</code> not permitted).
407     *
408     * @see #getLabelFont()
409     */
410    public void setLabelFont(Font font) {
411        if (font == null) {
412            throw new IllegalArgumentException("Null 'font' argument.");
413        }
414        if (!this.labelFont.equals(font)) {
415            this.labelFont = font;
416            fireChangeEvent();
417        }
418    }
419
420    /**
421     * Returns the color/shade used to draw the axis label.
422     *
423     * @return The paint (never <code>null</code>).
424     *
425     * @see #setLabelPaint(Paint)
426     */
427    public Paint getLabelPaint() {
428        return this.labelPaint;
429    }
430
431    /**
432     * Sets the paint used to draw the axis label and sends an
433     * {@link AxisChangeEvent} to all registered listeners.
434     *
435     * @param paint  the paint (<code>null</code> not permitted).
436     *
437     * @see #getLabelPaint()
438     */
439    public void setLabelPaint(Paint paint) {
440        if (paint == null) {
441            throw new IllegalArgumentException("Null 'paint' argument.");
442        }
443        this.labelPaint = paint;
444        fireChangeEvent();
445    }
446
447    /**
448     * Returns the insets for the label (that is, the amount of blank space
449     * that should be left around the label).
450     *
451     * @return The label insets (never <code>null</code>).
452     *
453     * @see #setLabelInsets(RectangleInsets)
454     */
455    public RectangleInsets getLabelInsets() {
456        return this.labelInsets;
457    }
458
459    /**
460     * Sets the insets for the axis label, and sends an {@link AxisChangeEvent}
461     * to all registered listeners.
462     *
463     * @param insets  the insets (<code>null</code> not permitted).
464     *
465     * @see #getLabelInsets()
466     */
467    public void setLabelInsets(RectangleInsets insets) {
468        setLabelInsets(insets, true);
469    }
470
471    /**
472     * Sets the insets for the axis label, and sends an {@link AxisChangeEvent}
473     * to all registered listeners.
474     *
475     * @param insets  the insets (<code>null</code> not permitted).
476     * @param notify  notify listeners?
477     *
478     * @since 1.0.10
479     */
480    public void setLabelInsets(RectangleInsets insets, boolean notify) {
481        if (insets == null) {
482            throw new IllegalArgumentException("Null 'insets' argument.");
483        }
484        if (!insets.equals(this.labelInsets)) {
485            this.labelInsets = insets;
486            if (notify) {
487                fireChangeEvent();
488            }
489        }
490    }
491
492    /**
493     * Returns the angle of the axis label.
494     *
495     * @return The angle (in radians).
496     *
497     * @see #setLabelAngle(double)
498     */
499    public double getLabelAngle() {
500        return this.labelAngle;
501    }
502
503    /**
504     * Sets the angle for the label and sends an {@link AxisChangeEvent} to all
505     * registered listeners.
506     *
507     * @param angle  the angle (in radians).
508     *
509     * @see #getLabelAngle()
510     */
511    public void setLabelAngle(double angle) {
512        this.labelAngle = angle;
513        fireChangeEvent();
514    }
515
516    /**
517     * A flag that controls whether or not the axis line is drawn.
518     *
519     * @return A boolean.
520     *
521     * @see #getAxisLinePaint()
522     * @see #getAxisLineStroke()
523     * @see #setAxisLineVisible(boolean)
524     */
525    public boolean isAxisLineVisible() {
526        return this.axisLineVisible;
527    }
528
529    /**
530     * Sets a flag that controls whether or not the axis line is visible and
531     * sends an {@link AxisChangeEvent} to all registered listeners.
532     *
533     * @param visible  the flag.
534     *
535     * @see #isAxisLineVisible()
536     * @see #setAxisLinePaint(Paint)
537     * @see #setAxisLineStroke(Stroke)
538     */
539    public void setAxisLineVisible(boolean visible) {
540        this.axisLineVisible = visible;
541        fireChangeEvent();
542    }
543
544    /**
545     * Returns the paint used to draw the axis line.
546     *
547     * @return The paint (never <code>null</code>).
548     *
549     * @see #setAxisLinePaint(Paint)
550     */
551    public Paint getAxisLinePaint() {
552        return this.axisLinePaint;
553    }
554
555    /**
556     * Sets the paint used to draw the axis line and sends an
557     * {@link AxisChangeEvent} to all registered listeners.
558     *
559     * @param paint  the paint (<code>null</code> not permitted).
560     *
561     * @see #getAxisLinePaint()
562     */
563    public void setAxisLinePaint(Paint paint) {
564        if (paint == null) {
565            throw new IllegalArgumentException("Null 'paint' argument.");
566        }
567        this.axisLinePaint = paint;
568        fireChangeEvent();
569    }
570
571    /**
572     * Returns the stroke used to draw the axis line.
573     *
574     * @return The stroke (never <code>null</code>).
575     *
576     * @see #setAxisLineStroke(Stroke)
577     */
578    public Stroke getAxisLineStroke() {
579        return this.axisLineStroke;
580    }
581
582    /**
583     * Sets the stroke used to draw the axis line and sends an
584     * {@link AxisChangeEvent} to all registered listeners.
585     *
586     * @param stroke  the stroke (<code>null</code> not permitted).
587     *
588     * @see #getAxisLineStroke()
589     */
590    public void setAxisLineStroke(Stroke stroke) {
591        if (stroke == null) {
592            throw new IllegalArgumentException("Null 'stroke' argument.");
593        }
594        this.axisLineStroke = stroke;
595        fireChangeEvent();
596    }
597
598    /**
599     * Returns a flag indicating whether or not the tick labels are visible.
600     *
601     * @return The flag.
602     *
603     * @see #getTickLabelFont()
604     * @see #getTickLabelPaint()
605     * @see #setTickLabelsVisible(boolean)
606     */
607    public boolean isTickLabelsVisible() {
608        return this.tickLabelsVisible;
609    }
610
611    /**
612     * Sets the flag that determines whether or not the tick labels are
613     * visible and sends an {@link AxisChangeEvent} to all registered
614     * listeners.
615     *
616     * @param flag  the flag.
617     *
618     * @see #isTickLabelsVisible()
619     * @see #setTickLabelFont(Font)
620     * @see #setTickLabelPaint(Paint)
621     */
622    public void setTickLabelsVisible(boolean flag) {
623
624        if (flag != this.tickLabelsVisible) {
625            this.tickLabelsVisible = flag;
626            fireChangeEvent();
627        }
628
629    }
630
631    /**
632     * Returns the flag that indicates whether or not the minor tick marks are
633     * showing.
634     *
635     * @return The flag that indicates whether or not the minor tick marks are
636     *         showing.
637     *
638     * @see #setMinorTickMarksVisible(boolean)
639     *
640     * @since 1.0.12
641     */
642    public boolean isMinorTickMarksVisible() {
643        return this.minorTickMarksVisible;
644    }
645
646    /**
647     * Sets the flag that indicates whether or not the minor tick marks are showing
648     * and sends an {@link AxisChangeEvent} to all registered listeners.
649     *
650     * @param flag  the flag.
651     *
652     * @see #isMinorTickMarksVisible()
653     *
654     * @since 1.0.12
655     */
656    public void setMinorTickMarksVisible(boolean flag) {
657        if (flag != this.minorTickMarksVisible) {
658            this.minorTickMarksVisible = flag;
659            fireChangeEvent();
660        }
661    }
662
663    /**
664     * Returns the font used for the tick labels (if showing).
665     *
666     * @return The font (never <code>null</code>).
667     *
668     * @see #setTickLabelFont(Font)
669     */
670    public Font getTickLabelFont() {
671        return this.tickLabelFont;
672    }
673
674    /**
675     * Sets the font for the tick labels and sends an {@link AxisChangeEvent}
676     * to all registered listeners.
677     *
678     * @param font  the font (<code>null</code> not allowed).
679     *
680     * @see #getTickLabelFont()
681     */
682    public void setTickLabelFont(Font font) {
683
684        if (font == null) {
685            throw new IllegalArgumentException("Null 'font' argument.");
686        }
687
688        if (!this.tickLabelFont.equals(font)) {
689            this.tickLabelFont = font;
690            fireChangeEvent();
691        }
692
693    }
694
695    /**
696     * Returns the color/shade used for the tick labels.
697     *
698     * @return The paint used for the tick labels.
699     *
700     * @see #setTickLabelPaint(Paint)
701     */
702    public Paint getTickLabelPaint() {
703        return this.tickLabelPaint;
704    }
705
706    /**
707     * Sets the paint used to draw tick labels (if they are showing) and
708     * sends an {@link AxisChangeEvent} to all registered listeners.
709     *
710     * @param paint  the paint (<code>null</code> not permitted).
711     *
712     * @see #getTickLabelPaint()
713     */
714    public void setTickLabelPaint(Paint paint) {
715        if (paint == null) {
716            throw new IllegalArgumentException("Null 'paint' argument.");
717        }
718        this.tickLabelPaint = paint;
719        fireChangeEvent();
720    }
721
722    /**
723     * Returns the insets for the tick labels.
724     *
725     * @return The insets (never <code>null</code>).
726     *
727     * @see #setTickLabelInsets(RectangleInsets)
728     */
729    public RectangleInsets getTickLabelInsets() {
730        return this.tickLabelInsets;
731    }
732
733    /**
734     * Sets the insets for the tick labels and sends an {@link AxisChangeEvent}
735     * to all registered listeners.
736     *
737     * @param insets  the insets (<code>null</code> not permitted).
738     *
739     * @see #getTickLabelInsets()
740     */
741    public void setTickLabelInsets(RectangleInsets insets) {
742        if (insets == null) {
743            throw new IllegalArgumentException("Null 'insets' argument.");
744        }
745        if (!this.tickLabelInsets.equals(insets)) {
746            this.tickLabelInsets = insets;
747            fireChangeEvent();
748        }
749    }
750
751    /**
752     * Returns the flag that indicates whether or not the tick marks are
753     * showing.
754     *
755     * @return The flag that indicates whether or not the tick marks are
756     *         showing.
757     *
758     * @see #setTickMarksVisible(boolean)
759     */
760    public boolean isTickMarksVisible() {
761        return this.tickMarksVisible;
762    }
763
764    /**
765     * Sets the flag that indicates whether or not the tick marks are showing
766     * and sends an {@link AxisChangeEvent} to all registered listeners.
767     *
768     * @param flag  the flag.
769     *
770     * @see #isTickMarksVisible()
771     */
772    public void setTickMarksVisible(boolean flag) {
773        if (flag != this.tickMarksVisible) {
774            this.tickMarksVisible = flag;
775            fireChangeEvent();
776        }
777    }
778
779    /**
780     * Returns the inside length of the tick marks.
781     *
782     * @return The length.
783     *
784     * @see #getTickMarkOutsideLength()
785     * @see #setTickMarkInsideLength(float)
786     */
787    public float getTickMarkInsideLength() {
788        return this.tickMarkInsideLength;
789    }
790
791    /**
792     * Sets the inside length of the tick marks and sends
793     * an {@link AxisChangeEvent} to all registered listeners.
794     *
795     * @param length  the new length.
796     *
797     * @see #getTickMarkInsideLength()
798     */
799    public void setTickMarkInsideLength(float length) {
800        this.tickMarkInsideLength = length;
801        fireChangeEvent();
802    }
803
804    /**
805     * Returns the outside length of the tick marks.
806     *
807     * @return The length.
808     *
809     * @see #getTickMarkInsideLength()
810     * @see #setTickMarkOutsideLength(float)
811     */
812    public float getTickMarkOutsideLength() {
813        return this.tickMarkOutsideLength;
814    }
815
816    /**
817     * Sets the outside length of the tick marks and sends
818     * an {@link AxisChangeEvent} to all registered listeners.
819     *
820     * @param length  the new length.
821     *
822     * @see #getTickMarkInsideLength()
823     */
824    public void setTickMarkOutsideLength(float length) {
825        this.tickMarkOutsideLength = length;
826        fireChangeEvent();
827    }
828
829    /**
830     * Returns the stroke used to draw tick marks.
831     *
832     * @return The stroke (never <code>null</code>).
833     *
834     * @see #setTickMarkStroke(Stroke)
835     */
836    public Stroke getTickMarkStroke() {
837        return this.tickMarkStroke;
838    }
839
840    /**
841     * Sets the stroke used to draw tick marks and sends
842     * an {@link AxisChangeEvent} to all registered listeners.
843     *
844     * @param stroke  the stroke (<code>null</code> not permitted).
845     *
846     * @see #getTickMarkStroke()
847     */
848    public void setTickMarkStroke(Stroke stroke) {
849        if (stroke == null) {
850            throw new IllegalArgumentException("Null 'stroke' argument.");
851        }
852        if (!this.tickMarkStroke.equals(stroke)) {
853            this.tickMarkStroke = stroke;
854            fireChangeEvent();
855        }
856    }
857
858    /**
859     * Returns the paint used to draw tick marks (if they are showing).
860     *
861     * @return The paint (never <code>null</code>).
862     *
863     * @see #setTickMarkPaint(Paint)
864     */
865    public Paint getTickMarkPaint() {
866        return this.tickMarkPaint;
867    }
868
869    /**
870     * Sets the paint used to draw tick marks and sends an
871     * {@link AxisChangeEvent} to all registered listeners.
872     *
873     * @param paint  the paint (<code>null</code> not permitted).
874     *
875     * @see #getTickMarkPaint()
876     */
877    public void setTickMarkPaint(Paint paint) {
878        if (paint == null) {
879            throw new IllegalArgumentException("Null 'paint' argument.");
880        }
881        this.tickMarkPaint = paint;
882        fireChangeEvent();
883    }
884
885    /**
886     * Returns the inside length of the minor tick marks.
887     *
888     * @return The length.
889     *
890     * @see #getMinorTickMarkOutsideLength()
891     * @see #setMinorTickMarkInsideLength(float)
892     *
893     * @since 1.0.12
894     */
895    public float getMinorTickMarkInsideLength() {
896        return this.minorTickMarkInsideLength;
897    }
898
899    /**
900     * Sets the inside length of the minor tick marks and sends
901     * an {@link AxisChangeEvent} to all registered listeners.
902     *
903     * @param length  the new length.
904     *
905     * @see #getMinorTickMarkInsideLength()
906     *
907     * @since 1.0.12
908     */
909    public void setMinorTickMarkInsideLength(float length) {
910        this.minorTickMarkInsideLength = length;
911        fireChangeEvent();
912    }
913
914    /**
915     * Returns the outside length of the minor tick marks.
916     *
917     * @return The length.
918     *
919     * @see #getMinorTickMarkInsideLength()
920     * @see #setMinorTickMarkOutsideLength(float)
921     *
922     * @since 1.0.12
923     */
924    public float getMinorTickMarkOutsideLength() {
925        return this.minorTickMarkOutsideLength;
926    }
927
928    /**
929     * Sets the outside length of the minor tick marks and sends
930     * an {@link AxisChangeEvent} to all registered listeners.
931     *
932     * @param length  the new length.
933     *
934     * @see #getMinorTickMarkInsideLength()
935     *
936     * @since 1.0.12
937     */
938    public void setMinorTickMarkOutsideLength(float length) {
939        this.minorTickMarkOutsideLength = length;
940        fireChangeEvent();
941    }
942
943    /**
944     * Returns the plot that the axis is assigned to.  This method will return
945     * <code>null</code> if the axis is not currently assigned to a plot.
946     *
947     * @return The plot that the axis is assigned to (possibly
948     *         <code>null</code>).
949     *
950     * @see #setPlot(Plot)
951     */
952    public Plot getPlot() {
953        return this.plot;
954    }
955
956    /**
957     * Sets a reference to the plot that the axis is assigned to.
958     * <P>
959     * This method is used internally, you shouldn't need to call it yourself.
960     *
961     * @param plot  the plot.
962     *
963     * @see #getPlot()
964     */
965    public void setPlot(Plot plot) {
966        this.plot = plot;
967        configure();
968    }
969
970    /**
971     * Returns the fixed dimension for the axis.
972     *
973     * @return The fixed dimension.
974     *
975     * @see #setFixedDimension(double)
976     */
977    public double getFixedDimension() {
978        return this.fixedDimension;
979    }
980
981    /**
982     * Sets the fixed dimension for the axis.
983     * <P>
984     * This is used when combining more than one plot on a chart.  In this case,
985     * there may be several axes that need to have the same height or width so
986     * that they are aligned.  This method is used to fix a dimension for the
987     * axis (the context determines whether the dimension is horizontal or
988     * vertical).
989     *
990     * @param dimension  the fixed dimension.
991     *
992     * @see #getFixedDimension()
993     */
994    public void setFixedDimension(double dimension) {
995        this.fixedDimension = dimension;
996    }
997
998    /**
999     * Configures the axis to work with the current plot.  Override this method
1000     * to perform any special processing (such as auto-rescaling).
1001     */
1002    public abstract void configure();
1003
1004    /**
1005     * Estimates the space (height or width) required to draw the axis.
1006     *
1007     * @param g2  the graphics device.
1008     * @param plot  the plot that the axis belongs to.
1009     * @param plotArea  the area within which the plot (including axes) should
1010     *                  be drawn.
1011     * @param edge  the axis location.
1012     * @param space  space already reserved.
1013     *
1014     * @return The space required to draw the axis (including pre-reserved
1015     *         space).
1016     */
1017    public abstract AxisSpace reserveSpace(Graphics2D g2, Plot plot,
1018                                           Rectangle2D plotArea,
1019                                           RectangleEdge edge,
1020                                           AxisSpace space);
1021
1022    /**
1023     * Draws the axis on a Java 2D graphics device (such as the screen or a
1024     * printer).
1025     *
1026     * @param g2  the graphics device (<code>null</code> not permitted).
1027     * @param cursor  the cursor location (determines where to draw the axis).
1028     * @param plotArea  the area within which the axes and plot should be drawn.
1029     * @param dataArea  the area within which the data should be drawn.
1030     * @param edge  the axis location (<code>null</code> not permitted).
1031     * @param plotState  collects information about the plot
1032     *                   (<code>null</code> permitted).
1033     *
1034     * @return The axis state (never <code>null</code>).
1035     */
1036    public abstract AxisState draw(Graphics2D g2,
1037                                   double cursor,
1038                                   Rectangle2D plotArea,
1039                                   Rectangle2D dataArea,
1040                                   RectangleEdge edge,
1041                                   PlotRenderingInfo plotState);
1042
1043    /**
1044     * Calculates the positions of the ticks for the axis, storing the results
1045     * in the tick list (ready for drawing).
1046     *
1047     * @param g2  the graphics device.
1048     * @param state  the axis state.
1049     * @param dataArea  the area inside the axes.
1050     * @param edge  the edge on which the axis is located.
1051     *
1052     * @return The list of ticks.
1053     */
1054    public abstract List refreshTicks(Graphics2D g2, AxisState state,
1055            Rectangle2D dataArea, RectangleEdge edge);
1056
1057    /**
1058     * Created an entity for the axis.
1059     *
1060     * @param cursor  the initial cursor value.
1061     * @param state  the axis state after completion of the drawing with a
1062     *     possibly updated cursor position.
1063     * @param dataArea  the data area.
1064     * @param edge  the edge.
1065     * @param plotState  the PlotRenderingInfo from which a reference to the
1066     *     entity collection can be obtained.
1067     *
1068     * @since 1.0.13
1069     */
1070        protected void createAndAddEntity(double cursor, AxisState state,
1071            Rectangle2D dataArea, RectangleEdge edge,
1072            PlotRenderingInfo plotState){
1073
1074                if (plotState == null || plotState.getOwner() == null) {
1075            return;  // no need to create entity if we can??t save it anyways...
1076        }
1077                Rectangle2D hotspot = null;
1078                if (edge.equals(RectangleEdge.TOP)){
1079                        hotspot = new Rectangle2D.Double(dataArea.getX(),
1080                    state.getCursor(), dataArea.getWidth(),
1081                    cursor - state.getCursor());
1082                }
1083                else if(edge.equals(RectangleEdge.BOTTOM)) {
1084                        hotspot = new Rectangle2D.Double(dataArea.getX(), cursor,
1085                    dataArea.getWidth(), state.getCursor() - cursor);
1086                }
1087                else if(edge.equals(RectangleEdge.LEFT)) {
1088                        hotspot = new Rectangle2D.Double(state.getCursor(),
1089                    dataArea.getY(), cursor - state.getCursor(),
1090                    dataArea.getHeight());
1091                }
1092                else if(edge.equals(RectangleEdge.RIGHT)){
1093                        hotspot = new Rectangle2D.Double(cursor, dataArea.getY(),
1094                    state.getCursor() - cursor, dataArea.getHeight());
1095                }
1096                EntityCollection e = plotState.getOwner().getEntityCollection();
1097                if (e != null) {
1098            e.add(new AxisEntity(hotspot, this));
1099        }
1100        }
1101
1102    /**
1103     * Registers an object for notification of changes to the axis.
1104     *
1105     * @param listener  the object that is being registered.
1106     *
1107     * @see #removeChangeListener(AxisChangeListener)
1108     */
1109    public void addChangeListener(AxisChangeListener listener) {
1110        this.listenerList.add(AxisChangeListener.class, listener);
1111    }
1112
1113    /**
1114     * Deregisters an object for notification of changes to the axis.
1115     *
1116     * @param listener  the object to deregister.
1117     *
1118     * @see #addChangeListener(AxisChangeListener)
1119     */
1120    public void removeChangeListener(AxisChangeListener listener) {
1121        this.listenerList.remove(AxisChangeListener.class, listener);
1122    }
1123
1124    /**
1125     * Returns <code>true</code> if the specified object is registered with
1126     * the dataset as a listener.  Most applications won't need to call this
1127     * method, it exists mainly for use by unit testing code.
1128     *
1129     * @param listener  the listener.
1130     *
1131     * @return A boolean.
1132     */
1133    public boolean hasListener(EventListener listener) {
1134        List list = Arrays.asList(this.listenerList.getListenerList());
1135        return list.contains(listener);
1136    }
1137
1138    /**
1139     * Notifies all registered listeners that the axis has changed.
1140     * The AxisChangeEvent provides information about the change.
1141     *
1142     * @param event  information about the change to the axis.
1143     */
1144    protected void notifyListeners(AxisChangeEvent event) {
1145        Object[] listeners = this.listenerList.getListenerList();
1146        for (int i = listeners.length - 2; i >= 0; i -= 2) {
1147            if (listeners[i] == AxisChangeListener.class) {
1148                ((AxisChangeListener) listeners[i + 1]).axisChanged(event);
1149            }
1150        }
1151    }
1152
1153    /**
1154     * Sends an {@link AxisChangeEvent} to all registered listeners.
1155     *
1156     * @since 1.0.12
1157     */
1158    protected void fireChangeEvent() {
1159        notifyListeners(new AxisChangeEvent(this));
1160    }
1161
1162    /**
1163     * Returns a rectangle that encloses the axis label.  This is typically
1164     * used for layout purposes (it gives the maximum dimensions of the label).
1165     *
1166     * @param g2  the graphics device.
1167     * @param edge  the edge of the plot area along which the axis is measuring.
1168     *
1169     * @return The enclosing rectangle.
1170     */
1171    protected Rectangle2D getLabelEnclosure(Graphics2D g2, RectangleEdge edge) {
1172
1173        Rectangle2D result = new Rectangle2D.Double();
1174        String axisLabel = getLabel();
1175        if (axisLabel != null && !axisLabel.equals("")) {
1176            FontMetrics fm = g2.getFontMetrics(getLabelFont());
1177            Rectangle2D bounds = TextUtilities.getTextBounds(axisLabel, g2, fm);
1178            RectangleInsets insets = getLabelInsets();
1179            bounds = insets.createOutsetRectangle(bounds);
1180            double angle = getLabelAngle();
1181            if (edge == RectangleEdge.LEFT || edge == RectangleEdge.RIGHT) {
1182                angle = angle - Math.PI / 2.0;
1183            }
1184            double x = bounds.getCenterX();
1185            double y = bounds.getCenterY();
1186            AffineTransform transformer
1187                = AffineTransform.getRotateInstance(angle, x, y);
1188            Shape labelBounds = transformer.createTransformedShape(bounds);
1189            result = labelBounds.getBounds2D();
1190        }
1191
1192        return result;
1193
1194    }
1195
1196    /**
1197     * Draws the axis label.
1198     *
1199     * @param label  the label text.
1200     * @param g2  the graphics device.
1201     * @param plotArea  the plot area.
1202     * @param dataArea  the area inside the axes.
1203     * @param edge  the location of the axis.
1204     * @param state  the axis state (<code>null</code> not permitted).
1205     *
1206     * @return Information about the axis.
1207     */
1208    protected AxisState drawLabel(String label, Graphics2D g2,
1209            Rectangle2D plotArea, Rectangle2D dataArea, RectangleEdge edge,
1210            AxisState state) {
1211
1212        // it is unlikely that 'state' will be null, but check anyway...
1213        if (state == null) {
1214            throw new IllegalArgumentException("Null 'state' argument.");
1215        }
1216
1217        if ((label == null) || (label.equals(""))) {
1218            return state;
1219        }
1220
1221        Font font = getLabelFont();
1222        RectangleInsets insets = getLabelInsets();
1223        g2.setFont(font);
1224        g2.setPaint(getLabelPaint());
1225        FontMetrics fm = g2.getFontMetrics();
1226        Rectangle2D labelBounds = TextUtilities.getTextBounds(label, g2, fm);
1227
1228        if (edge == RectangleEdge.TOP) {
1229            AffineTransform t = AffineTransform.getRotateInstance(
1230                    getLabelAngle(), labelBounds.getCenterX(),
1231                    labelBounds.getCenterY());
1232            Shape rotatedLabelBounds = t.createTransformedShape(labelBounds);
1233            labelBounds = rotatedLabelBounds.getBounds2D();
1234            double labelx = dataArea.getCenterX();
1235            double labely = state.getCursor() - insets.getBottom()
1236                            - labelBounds.getHeight() / 2.0;
1237            TextUtilities.drawRotatedString(label, g2, (float) labelx,
1238                    (float) labely, TextAnchor.CENTER, getLabelAngle(),
1239                    TextAnchor.CENTER);
1240            state.cursorUp(insets.getTop() + labelBounds.getHeight()
1241                    + insets.getBottom());
1242        }
1243        else if (edge == RectangleEdge.BOTTOM) {
1244            AffineTransform t = AffineTransform.getRotateInstance(
1245                    getLabelAngle(), labelBounds.getCenterX(),
1246                    labelBounds.getCenterY());
1247            Shape rotatedLabelBounds = t.createTransformedShape(labelBounds);
1248            labelBounds = rotatedLabelBounds.getBounds2D();
1249            double labelx = dataArea.getCenterX();
1250            double labely = state.getCursor()
1251                            + insets.getTop() + labelBounds.getHeight() / 2.0;
1252            TextUtilities.drawRotatedString(label, g2, (float) labelx,
1253                    (float) labely, TextAnchor.CENTER, getLabelAngle(),
1254                    TextAnchor.CENTER);
1255            state.cursorDown(insets.getTop() + labelBounds.getHeight()
1256                    + insets.getBottom());
1257        }
1258        else if (edge == RectangleEdge.LEFT) {
1259            AffineTransform t = AffineTransform.getRotateInstance(
1260                    getLabelAngle() - Math.PI / 2.0, labelBounds.getCenterX(),
1261                    labelBounds.getCenterY());
1262            Shape rotatedLabelBounds = t.createTransformedShape(labelBounds);
1263            labelBounds = rotatedLabelBounds.getBounds2D();
1264            double labelx = state.getCursor()
1265                            - insets.getRight() - labelBounds.getWidth() / 2.0;
1266            double labely = dataArea.getCenterY();
1267            TextUtilities.drawRotatedString(label, g2, (float) labelx,
1268                    (float) labely, TextAnchor.CENTER,
1269                    getLabelAngle() - Math.PI / 2.0, TextAnchor.CENTER);
1270            state.cursorLeft(insets.getLeft() + labelBounds.getWidth()
1271                    + insets.getRight());
1272        }
1273        else if (edge == RectangleEdge.RIGHT) {
1274
1275            AffineTransform t = AffineTransform.getRotateInstance(
1276                    getLabelAngle() + Math.PI / 2.0,
1277                    labelBounds.getCenterX(), labelBounds.getCenterY());
1278            Shape rotatedLabelBounds = t.createTransformedShape(labelBounds);
1279            labelBounds = rotatedLabelBounds.getBounds2D();
1280            double labelx = state.getCursor()
1281                            + insets.getLeft() + labelBounds.getWidth() / 2.0;
1282            double labely = dataArea.getY() + dataArea.getHeight() / 2.0;
1283            TextUtilities.drawRotatedString(label, g2, (float) labelx,
1284                    (float) labely, TextAnchor.CENTER,
1285                    getLabelAngle() + Math.PI / 2.0, TextAnchor.CENTER);
1286            state.cursorRight(insets.getLeft() + labelBounds.getWidth()
1287                    + insets.getRight());
1288
1289        }
1290
1291        return state;
1292
1293    }
1294
1295    /**
1296     * Draws an axis line at the current cursor position and edge.
1297     *
1298     * @param g2  the graphics device.
1299     * @param cursor  the cursor position.
1300     * @param dataArea  the data area.
1301     * @param edge  the edge.
1302     */
1303    protected void drawAxisLine(Graphics2D g2, double cursor,
1304            Rectangle2D dataArea, RectangleEdge edge) {
1305
1306        Line2D axisLine = null;
1307        if (edge == RectangleEdge.TOP) {
1308            axisLine = new Line2D.Double(dataArea.getX(), cursor,
1309                    dataArea.getMaxX(), cursor);
1310        }
1311        else if (edge == RectangleEdge.BOTTOM) {
1312            axisLine = new Line2D.Double(dataArea.getX(), cursor,
1313                    dataArea.getMaxX(), cursor);
1314        }
1315        else if (edge == RectangleEdge.LEFT) {
1316            axisLine = new Line2D.Double(cursor, dataArea.getY(), cursor,
1317                    dataArea.getMaxY());
1318        }
1319        else if (edge == RectangleEdge.RIGHT) {
1320            axisLine = new Line2D.Double(cursor, dataArea.getY(), cursor,
1321                    dataArea.getMaxY());
1322        }
1323        g2.setPaint(this.axisLinePaint);
1324        g2.setStroke(this.axisLineStroke);
1325        g2.draw(axisLine);
1326
1327    }
1328
1329    /**
1330     * Returns a clone of the axis.
1331     *
1332     * @return A clone.
1333     *
1334     * @throws CloneNotSupportedException if some component of the axis does
1335     *         not support cloning.
1336     */
1337    public Object clone() throws CloneNotSupportedException {
1338        Axis clone = (Axis) super.clone();
1339        // It's up to the plot which clones up to restore the correct references
1340        clone.plot = null;
1341        clone.listenerList = new EventListenerList();
1342        return clone;
1343    }
1344
1345    /**
1346     * Tests this axis for equality with another object.
1347     *
1348     * @param obj  the object (<code>null</code> permitted).
1349     *
1350     * @return <code>true</code> or <code>false</code>.
1351     */
1352    public boolean equals(Object obj) {
1353        if (obj == this) {
1354            return true;
1355        }
1356        if (!(obj instanceof Axis)) {
1357            return false;
1358        }
1359        Axis that = (Axis) obj;
1360        if (this.visible != that.visible) {
1361            return false;
1362        }
1363        if (!ObjectUtilities.equal(this.label, that.label)) {
1364            return false;
1365        }
1366        if (!ObjectUtilities.equal(this.labelFont, that.labelFont)) {
1367            return false;
1368        }
1369        if (!PaintUtilities.equal(this.labelPaint, that.labelPaint)) {
1370            return false;
1371        }
1372        if (!ObjectUtilities.equal(this.labelInsets, that.labelInsets)) {
1373            return false;
1374        }
1375        if (this.labelAngle != that.labelAngle) {
1376            return false;
1377        }
1378        if (this.axisLineVisible != that.axisLineVisible) {
1379            return false;
1380        }
1381        if (!ObjectUtilities.equal(this.axisLineStroke, that.axisLineStroke)) {
1382            return false;
1383        }
1384        if (!PaintUtilities.equal(this.axisLinePaint, that.axisLinePaint)) {
1385            return false;
1386        }
1387        if (this.tickLabelsVisible != that.tickLabelsVisible) {
1388            return false;
1389        }
1390        if (!ObjectUtilities.equal(this.tickLabelFont, that.tickLabelFont)) {
1391            return false;
1392        }
1393        if (!PaintUtilities.equal(this.tickLabelPaint, that.tickLabelPaint)) {
1394            return false;
1395        }
1396        if (!ObjectUtilities.equal(
1397            this.tickLabelInsets, that.tickLabelInsets
1398        )) {
1399            return false;
1400        }
1401        if (this.tickMarksVisible != that.tickMarksVisible) {
1402            return false;
1403        }
1404        if (this.tickMarkInsideLength != that.tickMarkInsideLength) {
1405            return false;
1406        }
1407        if (this.tickMarkOutsideLength != that.tickMarkOutsideLength) {
1408            return false;
1409        }
1410        if (!PaintUtilities.equal(this.tickMarkPaint, that.tickMarkPaint)) {
1411            return false;
1412        }
1413        if (!ObjectUtilities.equal(this.tickMarkStroke, that.tickMarkStroke)) {
1414            return false;
1415        }
1416        if (this.minorTickMarksVisible != that.minorTickMarksVisible) {
1417            return false;
1418        }
1419        if (this.minorTickMarkInsideLength != that.minorTickMarkInsideLength) {
1420            return false;
1421        }
1422        if (this.minorTickMarkOutsideLength != that.minorTickMarkOutsideLength) {
1423            return false;
1424        }
1425        if (this.fixedDimension != that.fixedDimension) {
1426            return false;
1427        }
1428        return true;
1429    }
1430
1431    /**
1432     * Provides serialization support.
1433     *
1434     * @param stream  the output stream.
1435     *
1436     * @throws IOException  if there is an I/O error.
1437     */
1438    private void writeObject(ObjectOutputStream stream) throws IOException {
1439        stream.defaultWriteObject();
1440        SerialUtilities.writePaint(this.labelPaint, stream);
1441        SerialUtilities.writePaint(this.tickLabelPaint, stream);
1442        SerialUtilities.writeStroke(this.axisLineStroke, stream);
1443        SerialUtilities.writePaint(this.axisLinePaint, stream);
1444        SerialUtilities.writeStroke(this.tickMarkStroke, stream);
1445        SerialUtilities.writePaint(this.tickMarkPaint, stream);
1446    }
1447
1448    /**
1449     * Provides serialization support.
1450     *
1451     * @param stream  the input stream.
1452     *
1453     * @throws IOException  if there is an I/O error.
1454     * @throws ClassNotFoundException  if there is a classpath problem.
1455     */
1456    private void readObject(ObjectInputStream stream)
1457        throws IOException, ClassNotFoundException {
1458        stream.defaultReadObject();
1459        this.labelPaint = SerialUtilities.readPaint(stream);
1460        this.tickLabelPaint = SerialUtilities.readPaint(stream);
1461        this.axisLineStroke = SerialUtilities.readStroke(stream);
1462        this.axisLinePaint = SerialUtilities.readPaint(stream);
1463        this.tickMarkStroke = SerialUtilities.readStroke(stream);
1464        this.tickMarkPaint = SerialUtilities.readPaint(stream);
1465        this.listenerList = new EventListenerList();
1466    }
1467
1468}