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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: * XYStepAreaRenderer.java 29: * ----------------------- 30: * (C) Copyright 2003-2008, by Matthias Rose and Contributors. 31: * 32: * Original Author: Matthias Rose (based on XYAreaRenderer.java); 33: * Contributor(s): David Gilbert (for Object Refinery Limited); 34: * 35: * Changes: 36: * -------- 37: * 07-Oct-2003 : Version 1, contributed by Matthias Rose (DG); 38: * 10-Feb-2004 : Added some getter and setter methods (DG); 39: * 25-Feb-2004 : Replaced CrosshairInfo with CrosshairState. Renamed 40: * XYToolTipGenerator --> XYItemLabelGenerator (DG); 41: * 15-Jul-2004 : Switched getX() with getXValue() and getY() with 42: * getYValue() (DG); 43: * 11-Nov-2004 : Now uses ShapeUtilities to translate shapes (DG); 44: * 06-Jul-2005 : Renamed get/setPlotShapes() --> get/setShapesVisible() (DG); 45: * ------------- JFREECHART 1.0.x --------------------------------------------- 46: * 06-Jul-2006 : Modified to call dataset methods that return double 47: * primitives only (DG); 48: * 06-Feb-2007 : Fixed bug 1086307, crosshairs with multiple axes (DG); 49: * 14-Feb-2007 : Added equals() method override (DG); 50: * 04-May-2007 : Set processVisibleItemsOnly flag to false (DG); 51: * 14-May-2008 : Call addEntity() from within drawItem() (DG); 52: * 53: */ 54: 55: package org.jfree.chart.renderer.xy; 56: 57: import java.awt.Graphics2D; 58: import java.awt.Paint; 59: import java.awt.Polygon; 60: import java.awt.Shape; 61: import java.awt.Stroke; 62: import java.awt.geom.Rectangle2D; 63: import java.io.Serializable; 64: 65: import org.jfree.chart.axis.ValueAxis; 66: import org.jfree.chart.entity.EntityCollection; 67: import org.jfree.chart.event.RendererChangeEvent; 68: import org.jfree.chart.labels.XYToolTipGenerator; 69: import org.jfree.chart.plot.CrosshairState; 70: import org.jfree.chart.plot.PlotOrientation; 71: import org.jfree.chart.plot.PlotRenderingInfo; 72: import org.jfree.chart.plot.XYPlot; 73: import org.jfree.chart.urls.XYURLGenerator; 74: import org.jfree.data.xy.XYDataset; 75: import org.jfree.util.PublicCloneable; 76: import org.jfree.util.ShapeUtilities; 77: 78: /** 79: * A step chart renderer that fills the area between the step and the x-axis. 80: */ 81: public class XYStepAreaRenderer extends AbstractXYItemRenderer 82: implements XYItemRenderer, Cloneable, PublicCloneable, Serializable { 83: 84: /** For serialization. */ 85: private static final long serialVersionUID = -7311560779702649635L; 86: 87: /** Useful constant for specifying the type of rendering (shapes only). */ 88: public static final int SHAPES = 1; 89: 90: /** Useful constant for specifying the type of rendering (area only). */ 91: public static final int AREA = 2; 92: 93: /** 94: * Useful constant for specifying the type of rendering (area and shapes). 95: */ 96: public static final int AREA_AND_SHAPES = 3; 97: 98: /** A flag indicating whether or not shapes are drawn at each XY point. */ 99: private boolean shapesVisible; 100: 101: /** A flag that controls whether or not shapes are filled for ALL series. */ 102: private boolean shapesFilled; 103: 104: /** A flag indicating whether or not Area are drawn at each XY point. */ 105: private boolean plotArea; 106: 107: /** A flag that controls whether or not the outline is shown. */ 108: private boolean showOutline; 109: 110: /** Area of the complete series */ 111: protected transient Polygon pArea = null; 112: 113: /** 114: * The value on the range axis which defines the 'lower' border of the 115: * area. 116: */ 117: private double rangeBase; 118: 119: /** 120: * Constructs a new renderer. 121: */ 122: public XYStepAreaRenderer() { 123: this(AREA); 124: } 125: 126: /** 127: * Constructs a new renderer. 128: * 129: * @param type the type of the renderer. 130: */ 131: public XYStepAreaRenderer(int type) { 132: this(type, null, null); 133: } 134: 135: /** 136: * Constructs a new renderer. 137: * <p> 138: * To specify the type of renderer, use one of the constants: 139: * AREA, SHAPES or AREA_AND_SHAPES. 140: * 141: * @param type the type of renderer. 142: * @param toolTipGenerator the tool tip generator to use 143: * (<code>null</code> permitted). 144: * @param urlGenerator the URL generator (<code>null</code> permitted). 145: */ 146: public XYStepAreaRenderer(int type, 147: XYToolTipGenerator toolTipGenerator, 148: XYURLGenerator urlGenerator) { 149: 150: super(); 151: setBaseToolTipGenerator(toolTipGenerator); 152: setURLGenerator(urlGenerator); 153: 154: if (type == AREA) { 155: this.plotArea = true; 156: } 157: else if (type == SHAPES) { 158: this.shapesVisible = true; 159: } 160: else if (type == AREA_AND_SHAPES) { 161: this.plotArea = true; 162: this.shapesVisible = true; 163: } 164: this.showOutline = false; 165: } 166: 167: /** 168: * Returns a flag that controls whether or not outlines of the areas are 169: * drawn. 170: * 171: * @return The flag. 172: * 173: * @see #setOutline(boolean) 174: */ 175: public boolean isOutline() { 176: return this.showOutline; 177: } 178: 179: /** 180: * Sets a flag that controls whether or not outlines of the areas are 181: * drawn, and sends a {@link RendererChangeEvent} to all registered 182: * listeners. 183: * 184: * @param show the flag. 185: * 186: * @see #isOutline() 187: */ 188: public void setOutline(boolean show) { 189: this.showOutline = show; 190: fireChangeEvent(); 191: } 192: 193: /** 194: * Returns true if shapes are being plotted by the renderer. 195: * 196: * @return <code>true</code> if shapes are being plotted by the renderer. 197: * 198: * @see #setShapesVisible(boolean) 199: */ 200: public boolean getShapesVisible() { 201: return this.shapesVisible; 202: } 203: 204: /** 205: * Sets the flag that controls whether or not shapes are displayed for each 206: * data item, and sends a {@link RendererChangeEvent} to all registered 207: * listeners. 208: * 209: * @param flag the flag. 210: * 211: * @see #getShapesVisible() 212: */ 213: public void setShapesVisible(boolean flag) { 214: this.shapesVisible = flag; 215: fireChangeEvent(); 216: } 217: 218: /** 219: * Returns the flag that controls whether or not the shapes are filled. 220: * 221: * @return A boolean. 222: * 223: * @see #setShapesFilled(boolean) 224: */ 225: public boolean isShapesFilled() { 226: return this.shapesFilled; 227: } 228: 229: /** 230: * Sets the 'shapes filled' for ALL series and sends a 231: * {@link RendererChangeEvent} to all registered listeners. 232: * 233: * @param filled the flag. 234: * 235: * @see #isShapesFilled() 236: */ 237: public void setShapesFilled(boolean filled) { 238: this.shapesFilled = filled; 239: fireChangeEvent(); 240: } 241: 242: /** 243: * Returns true if Area is being plotted by the renderer. 244: * 245: * @return <code>true</code> if Area is being plotted by the renderer. 246: * 247: * @see #setPlotArea(boolean) 248: */ 249: public boolean getPlotArea() { 250: return this.plotArea; 251: } 252: 253: /** 254: * Sets a flag that controls whether or not areas are drawn for each data 255: * item and sends a {@link RendererChangeEvent} to all registered 256: * listeners. 257: * 258: * @param flag the flag. 259: * 260: * @see #getPlotArea() 261: */ 262: public void setPlotArea(boolean flag) { 263: this.plotArea = flag; 264: fireChangeEvent(); 265: } 266: 267: /** 268: * Returns the value on the range axis which defines the 'lower' border of 269: * the area. 270: * 271: * @return <code>double</code> the value on the range axis which defines 272: * the 'lower' border of the area. 273: * 274: * @see #setRangeBase(double) 275: */ 276: public double getRangeBase() { 277: return this.rangeBase; 278: } 279: 280: /** 281: * Sets the value on the range axis which defines the default border of the 282: * area, and sends a {@link RendererChangeEvent} to all registered 283: * listeners. E.g. setRangeBase(Double.NEGATIVE_INFINITY) lets areas always 284: * reach the lower border of the plotArea. 285: * 286: * @param val the value on the range axis which defines the default border 287: * of the area. 288: * 289: * @see #getRangeBase() 290: */ 291: public void setRangeBase(double val) { 292: this.rangeBase = val; 293: fireChangeEvent(); 294: } 295: 296: /** 297: * Initialises the renderer. Here we calculate the Java2D y-coordinate for 298: * zero, since all the bars have their bases fixed at zero. 299: * 300: * @param g2 the graphics device. 301: * @param dataArea the area inside the axes. 302: * @param plot the plot. 303: * @param data the data. 304: * @param info an optional info collection object to return data back to 305: * the caller. 306: * 307: * @return The number of passes required by the renderer. 308: */ 309: public XYItemRendererState initialise(Graphics2D g2, 310: Rectangle2D dataArea, 311: XYPlot plot, 312: XYDataset data, 313: PlotRenderingInfo info) { 314: 315: 316: XYItemRendererState state = super.initialise(g2, dataArea, plot, data, 317: info); 318: // disable visible items optimisation - it doesn't work for this 319: // renderer... 320: state.setProcessVisibleItemsOnly(false); 321: return state; 322: 323: } 324: 325: 326: /** 327: * Draws the visual representation of a single data item. 328: * 329: * @param g2 the graphics device. 330: * @param state the renderer state. 331: * @param dataArea the area within which the data is being drawn. 332: * @param info collects information about the drawing. 333: * @param plot the plot (can be used to obtain standard color information 334: * etc). 335: * @param domainAxis the domain axis. 336: * @param rangeAxis the range axis. 337: * @param dataset the dataset. 338: * @param series the series index (zero-based). 339: * @param item the item index (zero-based). 340: * @param crosshairState crosshair information for the plot 341: * (<code>null</code> permitted). 342: * @param pass the pass index. 343: */ 344: public void drawItem(Graphics2D g2, 345: XYItemRendererState state, 346: Rectangle2D dataArea, 347: PlotRenderingInfo info, 348: XYPlot plot, 349: ValueAxis domainAxis, 350: ValueAxis rangeAxis, 351: XYDataset dataset, 352: int series, 353: int item, 354: CrosshairState crosshairState, 355: int pass) { 356: 357: PlotOrientation orientation = plot.getOrientation(); 358: 359: // Get the item count for the series, so that we can know which is the 360: // end of the series. 361: int itemCount = dataset.getItemCount(series); 362: 363: Paint paint = getItemPaint(series, item); 364: Stroke seriesStroke = getItemStroke(series, item); 365: g2.setPaint(paint); 366: g2.setStroke(seriesStroke); 367: 368: // get the data point... 369: double x1 = dataset.getXValue(series, item); 370: double y1 = dataset.getYValue(series, item); 371: double x = x1; 372: double y = Double.isNaN(y1) ? getRangeBase() : y1; 373: double transX1 = domainAxis.valueToJava2D(x, dataArea, 374: plot.getDomainAxisEdge()); 375: double transY1 = rangeAxis.valueToJava2D(y, dataArea, 376: plot.getRangeAxisEdge()); 377: 378: // avoid possible sun.dc.pr.PRException: endPath: bad path 379: transY1 = restrictValueToDataArea(transY1, plot, dataArea); 380: 381: if (this.pArea == null && !Double.isNaN(y1)) { 382: 383: // Create a new Area for the series 384: this.pArea = new Polygon(); 385: 386: // start from Y = rangeBase 387: double transY2 = rangeAxis.valueToJava2D(getRangeBase(), dataArea, 388: plot.getRangeAxisEdge()); 389: 390: // avoid possible sun.dc.pr.PRException: endPath: bad path 391: transY2 = restrictValueToDataArea(transY2, plot, dataArea); 392: 393: // The first point is (x, this.baseYValue) 394: if (orientation == PlotOrientation.VERTICAL) { 395: this.pArea.addPoint((int) transX1, (int) transY2); 396: } 397: else if (orientation == PlotOrientation.HORIZONTAL) { 398: this.pArea.addPoint((int) transY2, (int) transX1); 399: } 400: } 401: 402: double transX0 = 0; 403: double transY0 = restrictValueToDataArea(getRangeBase(), plot, 404: dataArea); 405: 406: double x0; 407: double y0; 408: if (item > 0) { 409: // get the previous data point... 410: x0 = dataset.getXValue(series, item - 1); 411: y0 = Double.isNaN(y1) ? y1 : dataset.getYValue(series, item - 1); 412: 413: x = x0; 414: y = Double.isNaN(y0) ? getRangeBase() : y0; 415: transX0 = domainAxis.valueToJava2D(x, dataArea, 416: plot.getDomainAxisEdge()); 417: transY0 = rangeAxis.valueToJava2D(y, dataArea, 418: plot.getRangeAxisEdge()); 419: 420: // avoid possible sun.dc.pr.PRException: endPath: bad path 421: transY0 = restrictValueToDataArea(transY0, plot, dataArea); 422: 423: if (Double.isNaN(y1)) { 424: // NULL value -> insert point on base line 425: // instead of 'step point' 426: transX1 = transX0; 427: transY0 = transY1; 428: } 429: if (transY0 != transY1) { 430: // not just a horizontal bar but need to perform a 'step'. 431: if (orientation == PlotOrientation.VERTICAL) { 432: this.pArea.addPoint((int) transX1, (int) transY0); 433: } 434: else if (orientation == PlotOrientation.HORIZONTAL) { 435: this.pArea.addPoint((int) transY0, (int) transX1); 436: } 437: } 438: } 439: 440: Shape shape = null; 441: if (!Double.isNaN(y1)) { 442: // Add each point to Area (x, y) 443: if (orientation == PlotOrientation.VERTICAL) { 444: this.pArea.addPoint((int) transX1, (int) transY1); 445: } 446: else if (orientation == PlotOrientation.HORIZONTAL) { 447: this.pArea.addPoint((int) transY1, (int) transX1); 448: } 449: 450: if (getShapesVisible()) { 451: shape = getItemShape(series, item); 452: if (orientation == PlotOrientation.VERTICAL) { 453: shape = ShapeUtilities.createTranslatedShape(shape, 454: transX1, transY1); 455: } 456: else if (orientation == PlotOrientation.HORIZONTAL) { 457: shape = ShapeUtilities.createTranslatedShape(shape, 458: transY1, transX1); 459: } 460: if (isShapesFilled()) { 461: g2.fill(shape); 462: } 463: else { 464: g2.draw(shape); 465: } 466: } 467: else { 468: if (orientation == PlotOrientation.VERTICAL) { 469: shape = new Rectangle2D.Double(transX1 - 2, transY1 - 2, 470: 4.0, 4.0); 471: } 472: else if (orientation == PlotOrientation.HORIZONTAL) { 473: shape = new Rectangle2D.Double(transY1 - 2, transX1 - 2, 474: 4.0, 4.0); 475: } 476: } 477: } 478: 479: // Check if the item is the last item for the series or if it 480: // is a NULL value and number of items > 0. We can't draw an area for 481: // a single point. 482: if (getPlotArea() && item > 0 && this.pArea != null 483: && (item == (itemCount - 1) || Double.isNaN(y1))) { 484: 485: double transY2 = rangeAxis.valueToJava2D(getRangeBase(), dataArea, 486: plot.getRangeAxisEdge()); 487: 488: // avoid possible sun.dc.pr.PRException: endPath: bad path 489: transY2 = restrictValueToDataArea(transY2, plot, dataArea); 490: 491: if (orientation == PlotOrientation.VERTICAL) { 492: // Add the last point (x,0) 493: this.pArea.addPoint((int) transX1, (int) transY2); 494: } 495: else if (orientation == PlotOrientation.HORIZONTAL) { 496: // Add the last point (x,0) 497: this.pArea.addPoint((int) transY2, (int) transX1); 498: } 499: 500: // fill the polygon 501: g2.fill(this.pArea); 502: 503: // draw an outline around the Area. 504: if (isOutline()) { 505: g2.setStroke(plot.getOutlineStroke()); 506: g2.setPaint(plot.getOutlinePaint()); 507: g2.draw(this.pArea); 508: } 509: 510: // start new area when needed (see above) 511: this.pArea = null; 512: } 513: 514: // do we need to update the crosshair values? 515: if (!Double.isNaN(y1)) { 516: int domainAxisIndex = plot.getDomainAxisIndex(domainAxis); 517: int rangeAxisIndex = plot.getRangeAxisIndex(rangeAxis); 518: updateCrosshairValues(crosshairState, x1, y1, domainAxisIndex, 519: rangeAxisIndex, transX1, transY1, orientation); 520: } 521: 522: // collect entity and tool tip information... 523: EntityCollection entities = state.getEntityCollection(); 524: if (entities != null) { 525: addEntity(entities, shape, dataset, series, item, transX1, transY1); 526: } 527: } 528: 529: /** 530: * Tests this renderer for equality with an arbitrary object. 531: * 532: * @param obj the object (<code>null</code> permitted). 533: * 534: * @return A boolean. 535: */ 536: public boolean equals(Object obj) { 537: if (obj == this) { 538: return true; 539: } 540: if (!(obj instanceof XYStepAreaRenderer)) { 541: return false; 542: } 543: XYStepAreaRenderer that = (XYStepAreaRenderer) obj; 544: if (this.showOutline != that.showOutline) { 545: return false; 546: } 547: if (this.shapesVisible != that.shapesVisible) { 548: return false; 549: } 550: if (this.shapesFilled != that.shapesFilled) { 551: return false; 552: } 553: if (this.plotArea != that.plotArea) { 554: return false; 555: } 556: if (this.rangeBase != that.rangeBase) { 557: return false; 558: } 559: return super.equals(obj); 560: } 561: 562: /** 563: * Returns a clone of the renderer. 564: * 565: * @return A clone. 566: * 567: * @throws CloneNotSupportedException if the renderer cannot be cloned. 568: */ 569: public Object clone() throws CloneNotSupportedException { 570: return super.clone(); 571: } 572: 573: /** 574: * Helper method which returns a value if it lies 575: * inside the visible dataArea and otherwise the corresponding 576: * coordinate on the border of the dataArea. The PlotOrientation 577: * is taken into account. 578: * Useful to avoid possible sun.dc.pr.PRException: endPath: bad path 579: * which occurs when trying to draw lines/shapes which in large part 580: * lie outside of the visible dataArea. 581: * 582: * @param value the value which shall be 583: * @param dataArea the area within which the data is being drawn. 584: * @param plot the plot (can be used to obtain standard color 585: * information etc). 586: * @return <code>double</code> value inside the data area. 587: */ 588: protected static double restrictValueToDataArea(double value, 589: XYPlot plot, 590: Rectangle2D dataArea) { 591: double min = 0; 592: double max = 0; 593: if (plot.getOrientation() == PlotOrientation.VERTICAL) { 594: min = dataArea.getMinY(); 595: max = dataArea.getMaxY(); 596: } 597: else if (plot.getOrientation() == PlotOrientation.HORIZONTAL) { 598: min = dataArea.getMinX(); 599: max = dataArea.getMaxX(); 600: } 601: if (value < min) { 602: value = min; 603: } 604: else if (value > max) { 605: value = max; 606: } 607: return value; 608: } 609: 610: }