Source for org.jfree.chart.renderer.category.LayeredBarRenderer

   1: /* ===========================================================
   2:  * JFreeChart : a free chart library for the Java(tm) platform
   3:  * ===========================================================
   4:  *
   5:  * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
   6:  *
   7:  * Project Info:  http://www.jfree.org/jfreechart/index.html
   8:  *
   9:  * This library is free software; you can redistribute it and/or modify it
  10:  * under the terms of the GNU Lesser General Public License as published by
  11:  * the Free Software Foundation; either version 2.1 of the License, or
  12:  * (at your option) any later version.
  13:  *
  14:  * This library is distributed in the hope that it will be useful, but
  15:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  16:  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
  17:  * License for more details.
  18:  *
  19:  * You should have received a copy of the GNU Lesser General Public
  20:  * License along with this library; if not, write to the Free Software
  21:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  22:  * USA.
  23:  *
  24:  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
  25:  * in the United States and other countries.]
  26:  *
  27:  * -----------------------
  28:  * LayeredBarRenderer.java
  29:  * -----------------------
  30:  * (C) Copyright 2003-2008, by Arnaud Lelievre and Contributors.
  31:  *
  32:  * Original Author:  Arnaud Lelievre (for Garden);
  33:  * Contributor(s):   David Gilbert (for Object Refinery Limited);
  34:  *                   Zoheb Borbora;
  35:  *
  36:  * Changes
  37:  * -------
  38:  * 28-Aug-2003 : Version 1 (AL);
  39:  * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
  40:  * 07-Oct-2003 : Added renderer state (DG);
  41:  * 21-Oct-2003 : Bar width moved to renderer state (DG);
  42:  * 05-Nov-2004 : Modified drawItem() signature (DG);
  43:  * 20-Apr-2005 : Renamed CategoryLabelGenerator
  44:  *               --> CategoryItemLabelGenerator (DG);
  45:  * 17-Nov-2005 : Added support for gradient paint (DG);
  46:  * ------------- JFREECHART 1.0.x ---------------------------------------------
  47:  * 18-Aug-2006 : Fixed the bar width calculation to respect the maximum bar
  48:  *               width setting (thanks to Zoheb Borbora) (DG);
  49:  * 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG);
  50:  *
  51:  */
  52: 
  53: package org.jfree.chart.renderer.category;
  54: 
  55: import java.awt.GradientPaint;
  56: import java.awt.Graphics2D;
  57: import java.awt.Paint;
  58: import java.awt.Stroke;
  59: import java.awt.geom.Rectangle2D;
  60: import java.io.Serializable;
  61: 
  62: import org.jfree.chart.axis.CategoryAxis;
  63: import org.jfree.chart.axis.ValueAxis;
  64: import org.jfree.chart.entity.CategoryItemEntity;
  65: import org.jfree.chart.entity.EntityCollection;
  66: import org.jfree.chart.labels.CategoryItemLabelGenerator;
  67: import org.jfree.chart.labels.CategoryToolTipGenerator;
  68: import org.jfree.chart.plot.CategoryPlot;
  69: import org.jfree.chart.plot.PlotOrientation;
  70: import org.jfree.data.category.CategoryDataset;
  71: import org.jfree.ui.GradientPaintTransformer;
  72: import org.jfree.ui.RectangleEdge;
  73: import org.jfree.util.ObjectList;
  74: 
  75: /**
  76:  * A {@link CategoryItemRenderer} that represents data using bars which are
  77:  * superimposed.
  78:  */
  79: public class LayeredBarRenderer extends BarRenderer implements Serializable {
  80: 
  81:     /** For serialization. */
  82:     private static final long serialVersionUID = -8716572894780469487L;
  83: 
  84:     /** A list of the width of each series bar. */
  85:     protected ObjectList seriesBarWidthList;
  86: 
  87:     /**
  88:      * Default constructor.
  89:      */
  90:     public LayeredBarRenderer() {
  91:         super();
  92:         this.seriesBarWidthList = new ObjectList();
  93:     }
  94: 
  95:     /**
  96:      * Returns the bar width for a series, or <code>Double.NaN</code> if no
  97:      * width has been set.
  98:      *
  99:      * @param series  the series index (zero based).
 100:      *
 101:      * @return The width for the series (1.0=100%, it is the maximum).
 102:      */
 103:     public double getSeriesBarWidth(int series) {
 104:         double result = Double.NaN;
 105:         Number n = (Number) this.seriesBarWidthList.get(series);
 106:         if (n != null) {
 107:             result = n.doubleValue();
 108:         }
 109:         return result;
 110:     }
 111: 
 112:     /**
 113:      * Sets the width of the bars of a series.
 114:      *
 115:      * @param series  the series index (zero based).
 116:      * @param width  the width of the series bar in percentage (1.0=100%, it is
 117:      *               the maximum).
 118:      */
 119:     public void setSeriesBarWidth(int series, double width) {
 120:         this.seriesBarWidthList.set(series, new Double(width));
 121:     }
 122: 
 123:     /**
 124:      * Calculates the bar width and stores it in the renderer state.
 125:      *
 126:      * @param plot  the plot.
 127:      * @param dataArea  the data area.
 128:      * @param rendererIndex  the renderer index.
 129:      * @param state  the renderer state.
 130:      */
 131:     protected void calculateBarWidth(CategoryPlot plot,
 132:                                      Rectangle2D dataArea,
 133:                                      int rendererIndex,
 134:                                      CategoryItemRendererState state) {
 135: 
 136:         // calculate the bar width - this calculation differs from the
 137:         // BarRenderer calculation because the bars are layered on top of one
 138:         // another, so there is effectively only one bar per category for
 139:         // the purpose of the bar width calculation
 140:         CategoryAxis domainAxis = getDomainAxis(plot, rendererIndex);
 141:         CategoryDataset dataset = plot.getDataset(rendererIndex);
 142:         if (dataset != null) {
 143:             int columns = dataset.getColumnCount();
 144:             int rows = dataset.getRowCount();
 145:             double space = 0.0;
 146:             PlotOrientation orientation = plot.getOrientation();
 147:             if (orientation == PlotOrientation.HORIZONTAL) {
 148:                 space = dataArea.getHeight();
 149:             }
 150:             else if (orientation == PlotOrientation.VERTICAL) {
 151:                 space = dataArea.getWidth();
 152:             }
 153:             double maxWidth = space * getMaximumBarWidth();
 154:             double categoryMargin = 0.0;
 155:             if (columns > 1) {
 156:                 categoryMargin = domainAxis.getCategoryMargin();
 157:             }
 158:             double used = space * (1 - domainAxis.getLowerMargin()
 159:                 - domainAxis.getUpperMargin() - categoryMargin);
 160:             if ((rows * columns) > 0) {
 161:                 state.setBarWidth(Math.min(used / (dataset.getColumnCount()),
 162:                         maxWidth));
 163:             }
 164:             else {
 165:                 state.setBarWidth(Math.min(used, maxWidth));
 166:             }
 167:         }
 168:     }
 169: 
 170:     /**
 171:      * Draws the bar for one item in the dataset.
 172:      *
 173:      * @param g2  the graphics device.
 174:      * @param state  the renderer state.
 175:      * @param dataArea  the plot area.
 176:      * @param plot  the plot.
 177:      * @param domainAxis  the domain (category) axis.
 178:      * @param rangeAxis  the range (value) axis.
 179:      * @param data  the data.
 180:      * @param row  the row index (zero-based).
 181:      * @param column  the column index (zero-based).
 182:      * @param pass  the pass index.
 183:      */
 184:     public void drawItem(Graphics2D g2,
 185:                          CategoryItemRendererState state,
 186:                          Rectangle2D dataArea,
 187:                          CategoryPlot plot,
 188:                          CategoryAxis domainAxis,
 189:                          ValueAxis rangeAxis,
 190:                          CategoryDataset data,
 191:                          int row,
 192:                          int column,
 193:                          int pass) {
 194: 
 195:         PlotOrientation orientation = plot.getOrientation();
 196:         if (orientation == PlotOrientation.HORIZONTAL) {
 197:             drawHorizontalItem(g2, state, dataArea, plot, domainAxis,
 198:                     rangeAxis, data, row, column);
 199:         }
 200:         else if (orientation == PlotOrientation.VERTICAL) {
 201:             drawVerticalItem(g2, state, dataArea, plot, domainAxis, rangeAxis,
 202:                     data, row, column);
 203:         }
 204: 
 205:     }
 206: 
 207:     /**
 208:      * Draws the bar for a single (series, category) data item.
 209:      *
 210:      * @param g2  the graphics device.
 211:      * @param state  the renderer state.
 212:      * @param dataArea  the data area.
 213:      * @param plot  the plot.
 214:      * @param domainAxis  the domain axis.
 215:      * @param rangeAxis  the range axis.
 216:      * @param data  the data.
 217:      * @param row  the row index (zero-based).
 218:      * @param column  the column index (zero-based).
 219:      */
 220:     protected void drawHorizontalItem(Graphics2D g2,
 221:                                       CategoryItemRendererState state,
 222:                                       Rectangle2D dataArea,
 223:                                       CategoryPlot plot,
 224:                                       CategoryAxis domainAxis,
 225:                                       ValueAxis rangeAxis,
 226:                                       CategoryDataset data,
 227:                                       int row,
 228:                                       int column) {
 229: 
 230:         // nothing is drawn for null values...
 231:         Number dataValue = data.getValue(row, column);
 232:         if (dataValue == null) {
 233:             return;
 234:         }
 235: 
 236:         // X
 237:         double value = dataValue.doubleValue();
 238:         double base = 0.0;
 239:         double lclip = getLowerClip();
 240:         double uclip = getUpperClip();
 241:         if (uclip <= 0.0) {  // cases 1, 2, 3 and 4
 242:             if (value >= uclip) {
 243:                 return; // bar is not visible
 244:             }
 245:             base = uclip;
 246:             if (value <= lclip) {
 247:                 value = lclip;
 248:             }
 249:         }
 250:         else if (lclip <= 0.0) { // cases 5, 6, 7 and 8
 251:             if (value >= uclip) {
 252:                 value = uclip;
 253:             }
 254:             else {
 255:                 if (value <= lclip) {
 256:                     value = lclip;
 257:                 }
 258:             }
 259:         }
 260:         else { // cases 9, 10, 11 and 12
 261:             if (value <= lclip) {
 262:                 return; // bar is not visible
 263:             }
 264:             base = lclip;
 265:             if (value >= uclip) {
 266:                 value = uclip;
 267:             }
 268:         }
 269: 
 270:         RectangleEdge edge = plot.getRangeAxisEdge();
 271:         double transX1 = rangeAxis.valueToJava2D(base, dataArea, edge);
 272:         double transX2 = rangeAxis.valueToJava2D(value, dataArea, edge);
 273:         double rectX = Math.min(transX1, transX2);
 274:         double rectWidth = Math.abs(transX2 - transX1);
 275: 
 276:         // Y
 277:         double rectY = domainAxis.getCategoryMiddle(column, getColumnCount(),
 278:                 dataArea, plot.getDomainAxisEdge()) - state.getBarWidth() / 2.0;
 279: 
 280:         int seriesCount = getRowCount();
 281: 
 282:         // draw the bar...
 283:         double shift = 0.0;
 284:         double rectHeight = 0.0;
 285:         double widthFactor = 1.0;
 286:         double seriesBarWidth = getSeriesBarWidth(row);
 287:         if (!Double.isNaN(seriesBarWidth)) {
 288:             widthFactor = seriesBarWidth;
 289:         }
 290:         rectHeight = widthFactor * state.getBarWidth();
 291:         rectY = rectY + (1 - widthFactor) * state.getBarWidth() / 2.0;
 292:         if (seriesCount > 1) {
 293:             shift = rectHeight * 0.20 / (seriesCount - 1);
 294:         }
 295: 
 296:         Rectangle2D bar = new Rectangle2D.Double(rectX,
 297:                 (rectY + ((seriesCount - 1 - row) * shift)), rectWidth,
 298:                 (rectHeight - (seriesCount - 1 - row) * shift * 2));
 299: 
 300:         Paint itemPaint = getItemPaint(row, column);
 301:         GradientPaintTransformer t = getGradientPaintTransformer();
 302:         if (t != null && itemPaint instanceof GradientPaint) {
 303:             itemPaint = t.transform((GradientPaint) itemPaint, bar);
 304:         }
 305:         g2.setPaint(itemPaint);
 306:         g2.fill(bar);
 307: 
 308:         // draw the outline...
 309:         if (isDrawBarOutline()
 310:                 && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
 311:             Stroke stroke = getItemOutlineStroke(row, column);
 312:             Paint paint = getItemOutlinePaint(row, column);
 313:             if (stroke != null && paint != null) {
 314:                 g2.setStroke(stroke);
 315:                 g2.setPaint(paint);
 316:                 g2.draw(bar);
 317:             }
 318:         }
 319: 
 320:         CategoryItemLabelGenerator generator
 321:             = getItemLabelGenerator(row, column);
 322:         if (generator != null && isItemLabelVisible(row, column)) {
 323:             drawItemLabel(g2, data, row, column, plot, generator, bar,
 324:                     (transX1 > transX2));
 325:         }
 326: 
 327:         // collect entity and tool tip information...
 328:         if (state.getInfo() != null) {
 329:             EntityCollection entities = state.getEntityCollection();
 330:             if (entities != null) {
 331:                 String tip = null;
 332:                 CategoryToolTipGenerator tipster
 333:                     = getToolTipGenerator(row, column);
 334:                 if (tipster != null) {
 335:                     tip = tipster.generateToolTip(data, row, column);
 336:                 }
 337:                 String url = null;
 338:                 if (getItemURLGenerator(row, column) != null) {
 339:                     url = getItemURLGenerator(row, column).generateURL(data,
 340:                             row, column);
 341:                 }
 342:                 CategoryItemEntity entity = new CategoryItemEntity(bar, tip,
 343:                         url, data, data.getRowKey(row),
 344:                         data.getColumnKey(column));
 345:                 entities.add(entity);
 346:             }
 347:         }
 348:     }
 349: 
 350:     /**
 351:      * Draws the bar for a single (series, category) data item.
 352:      *
 353:      * @param g2  the graphics device.
 354:      * @param state  the renderer state.
 355:      * @param dataArea  the data area.
 356:      * @param plot  the plot.
 357:      * @param domainAxis  the domain axis.
 358:      * @param rangeAxis  the range axis.
 359:      * @param data  the data.
 360:      * @param row  the row index (zero-based).
 361:      * @param column  the column index (zero-based).
 362:      */
 363:     protected void drawVerticalItem(Graphics2D g2,
 364:                                     CategoryItemRendererState state,
 365:                                     Rectangle2D dataArea,
 366:                                     CategoryPlot plot,
 367:                                     CategoryAxis domainAxis,
 368:                                     ValueAxis rangeAxis,
 369:                                     CategoryDataset data,
 370:                                     int row,
 371:                                     int column) {
 372: 
 373:         // nothing is drawn for null values...
 374:         Number dataValue = data.getValue(row, column);
 375:         if (dataValue == null) {
 376:             return;
 377:         }
 378: 
 379:         // BAR X
 380:         double rectX = domainAxis.getCategoryMiddle(column, getColumnCount(),
 381:                 dataArea, plot.getDomainAxisEdge()) - state.getBarWidth() / 2.0;
 382: 
 383:         int seriesCount = getRowCount();
 384: 
 385:         // BAR Y
 386:         double value = dataValue.doubleValue();
 387:         double base = 0.0;
 388:         double lclip = getLowerClip();
 389:         double uclip = getUpperClip();
 390: 
 391:         if (uclip <= 0.0) {  // cases 1, 2, 3 and 4
 392:             if (value >= uclip) {
 393:                 return; // bar is not visible
 394:             }
 395:             base = uclip;
 396:             if (value <= lclip) {
 397:                 value = lclip;
 398:             }
 399:         }
 400:         else if (lclip <= 0.0) { // cases 5, 6, 7 and 8
 401:             if (value >= uclip) {
 402:                 value = uclip;
 403:             }
 404:             else {
 405:                 if (value <= lclip) {
 406:                     value = lclip;
 407:                 }
 408:             }
 409:         }
 410:         else { // cases 9, 10, 11 and 12
 411:             if (value <= lclip) {
 412:                 return; // bar is not visible
 413:             }
 414:             base = getLowerClip();
 415:             if (value >= uclip) {
 416:                value = uclip;
 417:             }
 418:         }
 419: 
 420:         RectangleEdge edge = plot.getRangeAxisEdge();
 421:         double transY1 = rangeAxis.valueToJava2D(base, dataArea, edge);
 422:         double transY2 = rangeAxis.valueToJava2D(value, dataArea, edge);
 423:         double rectY = Math.min(transY2, transY1);
 424: 
 425:         double rectWidth = state.getBarWidth();
 426:         double rectHeight = Math.abs(transY2 - transY1);
 427: 
 428:         // draw the bar...
 429:         double shift = 0.0;
 430:         rectWidth = 0.0;
 431:         double widthFactor = 1.0;
 432:         double seriesBarWidth = getSeriesBarWidth(row);
 433:         if (!Double.isNaN(seriesBarWidth)) {
 434:             widthFactor = seriesBarWidth;
 435:         }
 436:         rectWidth = widthFactor * state.getBarWidth();
 437:         rectX = rectX + (1 - widthFactor) * state.getBarWidth() / 2.0;
 438:         if (seriesCount > 1) {
 439:             // needs to be improved !!!
 440:             shift = rectWidth * 0.20 / (seriesCount - 1);
 441:         }
 442: 
 443:         Rectangle2D bar = new Rectangle2D.Double(
 444:             (rectX + ((seriesCount - 1 - row) * shift)), rectY,
 445:             (rectWidth - (seriesCount - 1 - row) * shift * 2), rectHeight);
 446:         Paint itemPaint = getItemPaint(row, column);
 447:         GradientPaintTransformer t = getGradientPaintTransformer();
 448:         if (t != null && itemPaint instanceof GradientPaint) {
 449:             itemPaint = t.transform((GradientPaint) itemPaint, bar);
 450:         }
 451:         g2.setPaint(itemPaint);
 452:         g2.fill(bar);
 453: 
 454:         // draw the outline...
 455:         if (isDrawBarOutline()
 456:                 && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
 457:             Stroke stroke = getItemOutlineStroke(row, column);
 458:             Paint paint = getItemOutlinePaint(row, column);
 459:             if (stroke != null && paint != null) {
 460:                 g2.setStroke(stroke);
 461:                 g2.setPaint(paint);
 462:                 g2.draw(bar);
 463:             }
 464:         }
 465: 
 466:         // draw the item labels if there are any...
 467:         double transX1 = rangeAxis.valueToJava2D(base, dataArea, edge);
 468:         double transX2 = rangeAxis.valueToJava2D(value, dataArea, edge);
 469: 
 470:         CategoryItemLabelGenerator generator
 471:             = getItemLabelGenerator(row, column);
 472:         if (generator != null && isItemLabelVisible(row, column)) {
 473:             drawItemLabel(g2, data, row, column, plot, generator, bar,
 474:                     (transX1 > transX2));
 475:         }
 476: 
 477:         // collect entity and tool tip information...
 478:         if (state.getInfo() != null) {
 479:             EntityCollection entities = state.getEntityCollection();
 480:             if (entities != null) {
 481:                 String tip = null;
 482:                 CategoryToolTipGenerator tipster
 483:                     = getToolTipGenerator(row, column);
 484:                 if (tipster != null) {
 485:                     tip = tipster.generateToolTip(data, row, column);
 486:                 }
 487:                 String url = null;
 488:                 if (getItemURLGenerator(row, column) != null) {
 489:                     url = getItemURLGenerator(row, column).generateURL(
 490:                         data, row, column);
 491:                 }
 492:                 CategoryItemEntity entity = new CategoryItemEntity(bar, tip,
 493:                         url, data, data.getRowKey(row),
 494:                         data.getColumnKey(column));
 495:                 entities.add(entity);
 496:             }
 497:         }
 498:     }
 499: 
 500: }