Java > Open Source Codes > org > jfree > chart > renderer > BarRenderer


1 /* ======================================
2  * JFreeChart : a free Java chart library
3  * ======================================
4  *
5  * Project Info: http://www.jfree.org/jfreechart/index.html
6  * Project Lead: David Gilbert (david.gilbert@object-refinery.com);
7  *
8  * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors.
9  *
10  * This library is free software; you can redistribute it and/or modify it under the terms
11  * of the GNU Lesser General Public License as published by the Free Software Foundation;
12  * either version 2.1 of the License, or (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
15  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16  * See the GNU Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public License along with this
19  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20  * Boston, MA 02111-1307, USA.
21  *
22  * ----------------
23  * BarRenderer.java
24  * ----------------
25  * (C) Copyright 2002, 2003 by Object Refinery Limited.
26  *
27  * Original Author: David Gilbert (for Object Refinery Limited);
28  * Contributor(s): Christian W. Zuckschwerdt;
29  *
30  * $Id: BarRenderer.java,v 1.31 2003/11/27 11:46:06 mungady Exp $
31  *
32  * Changes
33  * -------
34  * 14-Mar-2002 : Version 1 (DG);
35  * 23-May-2002 : Added tooltip generator to renderer (DG);
36  * 29-May-2002 : Moved tooltip generator to abstract super-class (DG);
37  * 25-Jun-2002 : Changed constructor to protected and removed redundant code (DG);
38  * 26-Jun-2002 : Added axis to initialise method, and record upper and lower clip values (DG);
39  * 24-Sep-2002 : Added getLegendItem(...) method (DG);
40  * 09-Oct-2002 : Modified constructor to include URL generator (DG);
41  * 05-Nov-2002 : Base dataset is now TableDataset not CategoryDataset (DG);
42  * 10-Jan-2003 : Moved get/setItemMargin() method up from subclasses (DG);
43  * 17-Jan-2003 : Moved plot classes into a separate package (DG);
44  * 25-Mar-2003 : Implemented Serializable (DG);
45  * 01-May-2003 : Modified clipping to allow for dual axes and datasets (DG);
46  * 12-May-2003 : Merged horizontal and vertical bar renderers (DG);
47  * 12-Jun-2003 : Updates for item labels (DG);
48  * 30-Jul-2003 : Modified entity constructor (CZ);
49  * 02-Sep-2003 : Changed initialise method to fix bug 790407 (DG);
50  * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
51  * 07-Oct-2003 : Added renderer state (DG);
52  * 27-Oct-2003 : Merged drawHorizontalItem(...) and drawVerticalItem(...) methods (DG);
53  * 28-Oct-2003 : Added support for gradient paint on bars (DG);
54  * 14-Nov-2003 : Added 'maxBarWidth' attribute (DG);
55  *
56  */
57
58 package org.jfree.chart.renderer;
59
60 import java.awt.Font ;
61 import java.awt.GradientPaint ;
62 import java.awt.Graphics2D ;
63 import java.awt.Paint ;
64 import java.awt.Shape ;
65 import java.awt.Stroke ;
66 import java.awt.geom.Point2D ;
67 import java.awt.geom.Rectangle2D ;
68 import java.io.Serializable ;
69
70 import org.jfree.chart.axis.CategoryAxis;
71 import org.jfree.chart.axis.ValueAxis;
72 import org.jfree.chart.entity.CategoryItemEntity;
73 import org.jfree.chart.entity.EntityCollection;
74 import org.jfree.chart.event.RendererChangeEvent;
75 import org.jfree.chart.labels.CategoryItemLabelGenerator;
76 import org.jfree.chart.plot.CategoryPlot;
77 import org.jfree.chart.plot.PlotOrientation;
78 import org.jfree.chart.plot.PlotRenderingInfo;
79 import org.jfree.data.CategoryDataset;
80 import org.jfree.ui.GradientPaintTransformer;
81 import org.jfree.ui.RectangleEdge;
82 import org.jfree.ui.RefineryUtilities;
83 import org.jfree.ui.StandardGradientPaintTransformer;
84 import org.jfree.util.PublicCloneable;
85
86 /**
87  * A {@link CategoryItemRenderer} that draws individual data items as bars.
88  *
89  * @author David Gilbert
90  */
91 public class BarRenderer extends AbstractCategoryItemRenderer
92                          implements Cloneable , PublicCloneable, Serializable {
93
94     /** The default item margin percentage. */
95     public static final double DEFAULT_ITEM_MARGIN = 0.20;
96
97     /** Constant that controls the minimum width before a bar has an outline drawn. */
98     public static final double BAR_OUTLINE_WIDTH_THRESHOLD = 3.0;
99
100     /** The margin between items (bars) within a category. */
101     private double itemMargin;
102
103     /** A flag that controls whether or not bar outlines are drawn. */
104     private boolean drawBarOutline;
105     
106     /** The maximum bar width as a percentage of the available space. */
107     private double maxBarWidth;
108     
109     /** The minimum bar length (in Java2D units). */
110     private double minimumBarLength;
111     
112     /** An optional class used to transform gradient paint objects to fit each bar. */
113     private GradientPaintTransformer gradientPaintTransformer;
114     
115     /** The fallback position if a positive item label doesn't fit inside the bar. */
116     private ItemLabelPosition positiveItemLabelPositionFallback;
117     
118     /** The fallback position if a negative item label doesn't fit inside the bar. */
119     private ItemLabelPosition negativeItemLabelPositionFallback;
120     
121     /** The upper clip (axis) value for the axis. */
122     private double upperClip;
123
124     /** The lower clip (axis) value for the axis. */
125     private double lowerClip;
126
127     /**
128      * Creates a new bar renderer with default settings.
129      */
130     public BarRenderer() {
131         super();
132         this.itemMargin = DEFAULT_ITEM_MARGIN;
133         this.drawBarOutline = true;
134         this.maxBarWidth = 1.0; // 100 percent, so it will not apply unless changed
135 this.positiveItemLabelPositionFallback = null;
136         this.negativeItemLabelPositionFallback = null;
137         this.gradientPaintTransformer = new StandardGradientPaintTransformer();
138         this.minimumBarLength = 0.0;
139     }
140
141     /**
142      * Returns the item margin.
143      *
144      * @return The margin.
145      */
146     public double getItemMargin() {
147         return this.itemMargin;
148     }
149
150     /**
151      * Sets the item margin. The value is expressed as a percentage of the available width for
152      * plotting all the bars, with the resulting amount to be distributed between all the bars
153      * evenly.
154      *
155      * @param percent the new margin.
156      */
157     public void setItemMargin(double percent) {
158         this.itemMargin = percent;
159         firePropertyChanged("ItemMargin", null, null);
160     }
161
162     /**
163      * Returns a flag that controls whether or not bar outlines are drawn.
164      *
165      * @return A boolean.
166      */
167     public boolean isDrawBarOutline() {
168         return this.drawBarOutline;
169     }
170     
171     /**
172      * Sets the flag that controls whether or not bar outlines are drawn.
173      *
174      * @param draw the new flag value.
175      */
176     public void setDrawBarOutline(boolean draw) {
177         this.drawBarOutline = draw;
178         firePropertyChanged("DrawBarOutline", null, null);
179     }
180     
181     /**
182      * Returns the maximum bar width, as a percentage of the available drawing space.
183      *
184      * @return the maximum bar width.
185      */
186     public double getMaxBarWidth() {
187         return this.maxBarWidth;
188     }
189     
190     /**
191      * Sets the maximum bar width, which is specified as a percentage of the available space
192      * for all bars, and sends a {@link RendererChangeEvent} to all registered listeners.
193      *
194      * @param percent the percent.
195      */
196     public void setMaxBarWidth(double percent) {
197         this.maxBarWidth = percent;
198         notifyListeners(new RendererChangeEvent(this));
199     }
200
201     public double getMinimumBarLength() {
202         return this.minimumBarLength;
203     }
204     
205     public void setMinimumBarLength(double min) {
206         this.minimumBarLength = min;
207         notifyListeners(new RendererChangeEvent(this));
208     }
209     
210     /**
211      * Returns the gradient paint transformer (an object used to transform gradient paint objects
212      * to fit each bar.
213      *
214      * @return A transformer (<code>null</code> possible).
215      */
216     public GradientPaintTransformer getGradientPaintTransformer() {
217         return this.gradientPaintTransformer;
218     }
219     
220     /**
221      * Sets the gradient paint transformer and sends a {@link RendererChangeEvent} to all registered
222      * listeners.
223      *
224      * @param transformer the transformer (<code>null</code> permitted).
225      */
226     public void setGradientPaintTransformer(GradientPaintTransformer transformer) {
227         this.gradientPaintTransformer = transformer;
228         notifyListeners(new RendererChangeEvent(this));
229     }
230     
231     /**
232      * Returns the fallback position for positive item labels that don't fit within a bar.
233      *
234      * @return The fallback position (<code>null</code> possible).
235      */
236     public ItemLabelPosition getPositiveItemLabelPositionFallback() {
237         return this.positiveItemLabelPositionFallback;
238     }
239     
240     /**
241      * Sets the fallback position for positive item labels that don't fit within a bar, and sends
242      * a {@link RendererChangeEvent} to all registered listeners.
243      *
244      * @param position the position.
245      */
246     public void setPositiveItemLabelPositionFallback(ItemLabelPosition position) {
247         this.positiveItemLabelPositionFallback = position;
248         notifyListeners(new RendererChangeEvent(this));
249     }
250     
251     /**
252      * Returns the fallback position for negative item labels that don't fit within a bar.
253      *
254      * @return The fallback position (<code>null</code> possible).
255      */
256     public ItemLabelPosition getNegativeItemLabelPositionFallback() {
257         return this.negativeItemLabelPositionFallback;
258     }
259     
260     /**
261      * Sets the fallback position for negative item labels that don't fit within a bar, and sends
262      * a {@link RendererChangeEvent} to all registered listeners.
263      *
264      * @param position the position.
265      */
266     public void setNegativeItemLabelPositionFallback(ItemLabelPosition position) {
267         this.negativeItemLabelPositionFallback = position;
268         notifyListeners(new RendererChangeEvent(this));
269     }
270     
271     /**
272      * Returns the lower clip value.
273      * <P>
274      * This value is recalculated in the initialise() method.
275      *
276      * @return The value.
277      */
278     public double getLowerClip() {
279         return this.lowerClip;
280     }
281
282     /**
283      * Returns the upper clip value.
284      * <P>
285      * This value is recalculated in the initialise() method.
286      *
287      * @return The value.
288      */
289     public double getUpperClip() {
290         return this.upperClip;
291     }
292
293     /**
294      * Initialises the renderer and returns a state object that will be passed to subsequent calls
295      * to the drawItem method.
296      * <p>
297      * This method gets called once at the start of the process of drawing a chart.
298      *
299      * @param g2 the graphics device.
300      * @param dataArea the area in which the data is to be plotted.
301      * @param plot the plot.
302      * @param rendererIndex the renderer index (<code>null</code> for the primary renderer).
303      * @param info collects chart rendering information for return to caller.
304      *
305      * @return The renderer state.
306      *
307      */
308     public CategoryItemRendererState initialise(Graphics2D g2,
309                                                 Rectangle2D dataArea,
310                                                 CategoryPlot plot,
311                                                 Integer rendererIndex,
312                                                 PlotRenderingInfo info) {
313
314         CategoryItemRendererState state = super.initialise(g2, dataArea, plot, rendererIndex, info);
315
316         // get the clipping values...
317 ValueAxis rangeAxis = getRangeAxis(plot, rendererIndex);
318         this.lowerClip = rangeAxis.getRange().getLowerBound();
319         this.upperClip = rangeAxis.getRange().getUpperBound();
320
321         // calculate the bar width
322 calculateBarWidth(plot, dataArea, rendererIndex, state);
323
324         return state;
325         
326     }
327     
328     /**
329      * Calculates the bar width and stores it in the renderer state.
330      *
331      * @param plot the plot.
332      * @param dataArea the data area.
333      * @param rendererIndex the renderer index.
334      * @param state the renderer state.
335      */
336     protected void calculateBarWidth(CategoryPlot plot,
337                                      Rectangle2D dataArea,
338                                      Integer rendererIndex,
339                                      CategoryItemRendererState state) {
340                                          
341         CategoryAxis domainAxis = getDomainAxis(plot, rendererIndex);
342         CategoryDataset dataset = getDataset(plot, rendererIndex);
343         if (dataset != null) {
344             int columns = dataset.getColumnCount();
345             int rows = dataset.getRowCount();
346             double space = 0.0;
347             PlotOrientation orientation = plot.getOrientation();
348             if (orientation == PlotOrientation.HORIZONTAL) {
349                 space = dataArea.getHeight();
350             }
351             else if (orientation == PlotOrientation.VERTICAL) {
352                 space = dataArea.getWidth();
353             }
354             double maxWidth = space * getMaxBarWidth();
355             double categoryMargin = 0.0;
356             double currentItemMargin = 0.0;
357             if (columns > 1) {
358                 categoryMargin = domainAxis.getCategoryMargin();
359             }
360             if (rows > 1) {
361                 currentItemMargin = getItemMargin();
362             }
363             double used = space * (1 - domainAxis.getLowerMargin() - domainAxis.getUpperMargin()
364                                      - categoryMargin - currentItemMargin);
365             if ((rows * columns) > 0) {
366                 state.setBarWidth(Math.min(used / (rows * columns), maxWidth));
367             }
368             else {
369                 state.setBarWidth(Math.min(used, maxWidth));
370             }
371         }
372     }
373
374     /**
375      * Calculates the coordinate of the first "side" of a bar. This will be the minimum
376      * x-coordinate for a vertical bar, and the minimum y-coordinate for a horizontal bar.
377      *
378      * @param plot the plot.
379      * @param orientation the plot orientation.
380      * @param dataArea the data area.
381      * @param domainAxis the domain axis.
382      * @param state the renderer state (has the bar width precalculated).
383      * @param row the row index.
384      * @param column the column index.
385      *
386      * @return the coordinate.
387      */
388     protected double calculateBarW0(CategoryPlot plot,
389                                     PlotOrientation orientation,
390                                     Rectangle2D dataArea,
391                                     CategoryAxis domainAxis,
392                                     CategoryItemRendererState state,
393                                     int row,
394                                     int column) {
395         // calculate bar width...
396 double space = 0.0;
397         if (orientation == PlotOrientation.HORIZONTAL) {
398             space = dataArea.getHeight();
399         }
400         else {
401             space = dataArea.getWidth();
402         }
403         double barW0 = domainAxis.getCategoryStart(column, getColumnCount(), dataArea,
404                                                    plot.getDomainAxisEdge());
405         int seriesCount = getRowCount();
406         int categoryCount = getColumnCount();
407         if (seriesCount > 1) {
408             double seriesGap = space * getItemMargin() / (categoryCount * (seriesCount - 1));
409             double seriesW = calculateSeriesWidth(space, domainAxis, categoryCount, seriesCount);
410             barW0 = barW0 + row * (seriesW + seriesGap)
411                           + (seriesW / 2.0) - (state.getBarWidth() / 2.0);
412         }
413         else {
414             barW0 = domainAxis.getCategoryMiddle(column, getColumnCount(), dataArea,
415                                                  plot.getDomainAxisEdge())
416                     - state.getBarWidth() / 2.0;
417         }
418         return barW0;
419     }
420     
421     /**
422      * Calculates the coordinates for the length of a single bar.
423      *
424      * @param value the value represented by the bar.
425      *
426      * @return the coordinates for each end of the bar (or <code>null</code> if the bar is not
427      * visible for the current axis range).
428      */
429     protected double[] calculateBarL0L1(double value) {
430
431         double base = 0.0;
432         double lclip = getLowerClip();
433         double uclip = getUpperClip();
434         if (uclip <= 0.0) { // cases 1, 2, 3 and 4
435 if (value >= uclip) {
436                 return null; // bar is not visible
437 }
438             base = uclip;
439             if (value <= lclip) {
440                 value = lclip;
441             }
442         }
443         else if (lclip <= 0.0) { // cases 5, 6, 7 and 8
444 if (value >= uclip) {
445                 value = uclip;
446             }
447             else {
448                 if (value <= lclip) {
449                     value = lclip;
450                 }
451             }
452         }
453         else { // cases 9, 10, 11 and 12
454 if (value <= lclip) {
455                 return null; // bar is not visible
456 }
457             base = lclip;
458             if (value >= uclip) {
459                 value = uclip;
460             }
461         }
462         return new double[] {base, value};
463     }
464
465     /**
466      * Draws the bar for a single (series, category) data item.
467      *
468      * @param g2 the graphics device.
469      * @param state the renderer state.
470      * @param dataArea the data area.
471      * @param plot the plot.
472      * @param domainAxis the domain axis.
473      * @param rangeAxis the range axis.
474      * @param dataset the dataset.
475      * @param row the row index (zero-based).
476      * @param column the column index (zero-based).
477      */
478     public void drawItem(Graphics2D g2,
479                          CategoryItemRendererState state,
480                          Rectangle2D dataArea,
481                          CategoryPlot plot,
482                          CategoryAxis domainAxis,
483                          ValueAxis rangeAxis,
484                          CategoryDataset dataset,
485                          int row,
486                          int column) {
487
488         // nothing is drawn for null values...
489 Number dataValue = dataset.getValue(row, column);
490         if (dataValue == null) {
491             return;
492         }
493         
494         double value = dataValue.doubleValue();
495         
496         PlotOrientation orientation = plot.getOrientation();
497         double barW0 = calculateBarW0(plot, orientation, dataArea, domainAxis, state, row, column);
498         double[] barL0L1 = calculateBarL0L1(value);
499         if (barL0L1 == null) {
500             return; // the bar is not visible
501 }
502         
503         RectangleEdge edge = plot.getRangeAxisEdge();
504         double transL0 = rangeAxis.translateValueToJava2D(barL0L1[0], dataArea, edge);
505         double transL1 = rangeAxis.translateValueToJava2D(barL0L1[1], dataArea, edge);
506         double barL0 = Math.min(transL0, transL1);
507         double barLength = Math.max(Math.abs(transL1 - transL0), this.minimumBarLength);
508
509         // draw the bar...
510 Rectangle2D bar = null;
511         if (orientation == PlotOrientation.HORIZONTAL) {
512             bar = new Rectangle2D.Double (barL0, barW0, barLength, state.getBarWidth());
513         }
514         else {
515             bar = new Rectangle2D.Double (barW0, barL0, state.getBarWidth(), barLength);
516         }
517         Paint itemPaint = getItemPaint(row, column);
518         if (this.gradientPaintTransformer != null && itemPaint instanceof GradientPaint ) {
519             GradientPaint gp = (GradientPaint ) itemPaint;
520             itemPaint = this.gradientPaintTransformer.transform(gp, bar);
521         }
522         g2.setPaint(itemPaint);
523         g2.fill(bar);
524
525         // draw the outline...
526 if (isDrawBarOutline() && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
527             Stroke stroke = getItemOutlineStroke(row, column);
528             Paint paint = getItemOutlinePaint(row, column);
529             if (stroke != null && paint != null) {
530                 g2.setStroke(stroke);
531                 g2.setPaint(paint);
532                 g2.draw(bar);
533             }
534         }
535
536         CategoryItemLabelGenerator generator = getItemLabelGenerator(row, column);
537         if (generator != null && isItemLabelVisible(row, column)) {
538             drawItemLabel(g2, dataset, row, column, plot, generator, bar, (value < 0.0));
539         }
540                 
541         // collect entity and tool tip information...
542 if (state.getInfo() != null) {
543             EntityCollection entities = state.getInfo().getOwner().getEntityCollection();
544             if (entities != null) {
545                 String tip = null;
546                 if (generator != null) {
547                     tip = generator.generateToolTip(dataset, row, column);
548                 }
549                 String url = null;
550                 if (getItemURLGenerator(row, column) != null) {
551                     url = getItemURLGenerator(row, column).generateURL(dataset, row, column);
552                 }
553                 CategoryItemEntity entity = new CategoryItemEntity(
554                     bar, tip, url, dataset, row, dataset.getColumnKey(column), column
555                 );
556                 entities.addEntity(entity);
557             }
558
559         }
560
561     }
562
563     /**
564      * Calculates the available space for each series.
565      *
566      * @param space the space along the entire axis (in Java2D units).
567      * @param axis the category axis.
568      * @param categories the number of categories.
569      * @param series the number of series.
570      *
571      * @return the width of one series.
572      */
573     protected double calculateSeriesWidth(double space, CategoryAxis axis,
574                                           int categories, int series) {
575         double factor = 1.0 - getItemMargin() - axis.getLowerMargin() - axis.getUpperMargin();
576         if (categories > 1) {
577             factor = factor - axis.getCategoryMargin();
578         }
579         return (space * factor) / (categories * series);
580     }
581     
582     /**
583      * Draws an item label. This method is overridden so that the bar can be used
584      * to calculate the label anchor point.
585      *
586      * @param g2 the graphics device.
587      * @param data the dataset.
588      * @param row the row.
589      * @param column the column.
590      * @param plot the plot.
591      * @param generator the label generator.
592      * @param bar the bar.
593      * @param negative a flag indicating a negative value.
594      */
595     protected void drawItemLabel(Graphics2D g2,
596                                  CategoryDataset data,
597                                  int row,
598                                  int column,
599                                  CategoryPlot plot,
600                                  CategoryItemLabelGenerator generator,
601                                  Rectangle2D bar,
602                                  boolean negative) {
603                                      
604         // draw the item labels if there are any...
605 Font labelFont = getItemLabelFont(row, column);
606         g2.setFont(labelFont);
607         Paint paint = getItemLabelPaint(row, column);
608         g2.setPaint(paint);
609         String label = generator.generateItemLabel(data, row, column);
610
611         // find out where to place the label...
612 ItemLabelPosition position = null;
613         if (!negative) {
614             position = getPositiveItemLabelPosition(row, column);
615         }
616         else {
617             position = getNegativeItemLabelPosition(row, column);
618         }
619
620         // work out the label anchor point...
621 Point2D anchorPoint = calculateLabelAnchorPoint(position.getItemLabelAnchor(),
622                                                         bar,
623                                                         plot.getOrientation());
624         
625         if (isInternalAnchor(position.getItemLabelAnchor())) {
626             Shape bounds = RefineryUtilities.calculateRotatedStringBounds(
627                 label, g2,
628                 (float) anchorPoint.getX(),
629                 (float) anchorPoint.getY(),
630                 position.getTextAnchor(),
631                 position.getRotationAnchor(),
632                 position.getAngle());
633         
634             if (!bar.contains(bounds.getBounds2D())) {
635                 if (!negative) {
636                     position = getPositiveItemLabelPositionFallback();
637                 }
638                 else {
639                     position = getNegativeItemLabelPositionFallback();
640                 }
641                 if (position != null) {
642                     anchorPoint = calculateLabelAnchorPoint(position.getItemLabelAnchor(),
643                                                             bar,
644                                                             plot.getOrientation());
645                 }
646             }
647         
648         }
649         
650         if (position != null) {
651             RefineryUtilities.drawRotatedString(label, g2,
652                                                 (float) anchorPoint.getX(),
653                                                 (float) anchorPoint.getY(),
654                                                 position.getTextAnchor(),
655                                                 position.getRotationAnchor(),
656                                                 position.getAngle());
657         }
658     }
659     
660     /**
661      * Calculates the item label anchor point.
662      *
663      * @param anchor the anchor.
664      * @param bar the bar.
665      * @param orientation the plot orientation.
666      *
667      * @return The anchor point.
668      */
669     private Point2D calculateLabelAnchorPoint(ItemLabelAnchor anchor,
670                                               Rectangle2D bar, PlotOrientation orientation) {
671
672         Point2D result = null;
673         double offset = getItemLabelAnchorOffset();
674         double x0 = bar.getX() - offset;
675         double x1 = bar.getX();
676         double x2 = bar.getX() + offset;
677         double x3 = bar.getCenterX();
678         double x4 = bar.getMaxX() - offset;
679         double x5 = bar.getMaxX();
680         double x6 = bar.getMaxX() + offset;
681
682         double y0 = bar.getMaxY() + offset;
683         double y1 = bar.getMaxY();
684         double y2 = bar.getMaxY() - offset;
685         double y3 = bar.getCenterY();
686         double y4 = bar.getMinY() + offset;
687         double y5 = bar.getMinY();
688         double y6 = bar.getMinY() - offset;
689
690         if (anchor == ItemLabelAnchor.CENTER) {
691             result = new Point2D.Double (x3, y3);
692         }
693         else if (anchor == ItemLabelAnchor.INSIDE1) {
694             result = new Point2D.Double (x4, y4);
695         }
696         else if (anchor == ItemLabelAnchor.INSIDE2) {
697             result = new Point2D.Double (x4, y4);
698         }
699         else if (anchor == ItemLabelAnchor.INSIDE3) {
700             result = new Point2D.Double (x4, y3);
701         }
702         else if (anchor == ItemLabelAnchor.INSIDE4) {
703             result = new Point2D.Double (x4, y2);
704         }
705         else if (anchor == ItemLabelAnchor.INSIDE5) {
706             result = new Point2D.Double (x4, y2);
707         }
708         else if (anchor == ItemLabelAnchor.INSIDE6) {
709             result = new Point2D.Double (x3, y2);
710         }
711         else if (anchor == ItemLabelAnchor.INSIDE7) {
712             result = new Point2D.Double (x2, y2);
713         }
714         else if (anchor == ItemLabelAnchor.INSIDE8) {
715             result = new Point2D.Double (x2, y2);
716         }
717         else if (anchor == ItemLabelAnchor.INSIDE9) {
718             result = new Point2D.Double (x2, y3);
719         }
720         else if (anchor == ItemLabelAnchor.INSIDE10) {
721             result = new Point2D.Double (x2, y4);
722         }
723         else if (anchor == ItemLabelAnchor.INSIDE11) {
724             result = new Point2D.Double (x2, y4);
725         }
726         else if (anchor == ItemLabelAnchor.INSIDE12) {
727             result = new Point2D.Double (x3, y4);
728         }
729         else if (anchor == ItemLabelAnchor.OUTSIDE1) {
730             result = new Point2D.Double (x5, y6);
731         }
732         else if (anchor == ItemLabelAnchor.OUTSIDE2) {
733             result = new Point2D.Double (x6, y5);
734         }
735         else if (anchor == ItemLabelAnchor.OUTSIDE3) {
736             result = new Point2D.Double (x6, y3);
737         }
738         else if (anchor == ItemLabelAnchor.OUTSIDE4) {
739             result = new Point2D.Double (x6, y1);
740         }
741         else if (anchor == ItemLabelAnchor.OUTSIDE5) {
742             result = new Point2D.Double (x5, y0);
743         }
744         else if (anchor == ItemLabelAnchor.OUTSIDE6) {
745             result = new Point2D.Double (x3, y0);
746         }
747         else if (anchor == ItemLabelAnchor.OUTSIDE7) {
748             result = new Point2D.Double (x1, y0);
749         }
750         else if (anchor == ItemLabelAnchor.OUTSIDE8) {
751             result = new Point2D.Double (x0, y1);
752         }
753         else if (anchor == ItemLabelAnchor.OUTSIDE9) {
754             result = new Point2D.Double (x0, y3);
755         }
756         else if (anchor == ItemLabelAnchor.OUTSIDE10) {
757             result = new Point2D.Double (x0, y5);
758         }
759         else if (anchor == ItemLabelAnchor.OUTSIDE11) {
760             result = new Point2D.Double (x1, y6);
761         }
762         else if (anchor == ItemLabelAnchor.OUTSIDE12) {
763             result = new Point2D.Double (x3, y6);
764         }
765
766         return result;
767
768     }
769     
770     /**
771      * Returns <code>true</code> if the specified anchor point is inside a bar.
772      *
773      * @param anchor the anchor point.
774      *
775      * @return A boolean.
776      */
777     private boolean isInternalAnchor(ItemLabelAnchor anchor) {
778         return anchor == ItemLabelAnchor.CENTER
779                || anchor == ItemLabelAnchor.INSIDE1
780                || anchor == ItemLabelAnchor.INSIDE2
781                || anchor == ItemLabelAnchor.INSIDE3
782                || anchor == ItemLabelAnchor.INSIDE4
783                || anchor == ItemLabelAnchor.INSIDE5
784                || anchor == ItemLabelAnchor.INSIDE6
785                || anchor == ItemLabelAnchor.INSIDE7
786                || anchor == ItemLabelAnchor.INSIDE8
787                || anchor == ItemLabelAnchor.INSIDE9
788                || anchor == ItemLabelAnchor.INSIDE10
789                || anchor == ItemLabelAnchor.INSIDE11
790                || anchor == ItemLabelAnchor.INSIDE12;
791                
792     }
793     
794     /**
795      * Tests an object for equality with this instance.
796      *
797      * @param object the object.
798      *
799      * @return A boolean.
800      */
801     public boolean equals(Object object) {
802         
803         if (object == null) {
804             return false;
805         }
806         
807         if (object == this) {
808             return true;
809         }
810         
811         if (super.equals(object) && (object instanceof BarRenderer)) {
812
813             BarRenderer r = (BarRenderer) object;
814             boolean b0 = (this.itemMargin == r.itemMargin);
815             boolean b1 = (this.drawBarOutline == r.drawBarOutline);
816             return b0 && b1;
817         }
818         
819         return false;
820         
821     }
822
823 }
824

A to Z: JavaDoc & Examples

---

Daily Java News & Articles

---

Open Source Projects

---

Open Source Codes

---

Free Computer Books

---

Remove Frame

---

Popular Tags