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jfreechart example source code file (StatisticalLineAndShapeRenderer.java)

This example jfreechart source code file (StatisticalLineAndShapeRenderer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

awt, entitycollection, geometry, io, ioexception, ioexception, line2d, number, number, paint, serializable, shape, statisticalcategorydataset, statisticalcategorydataset, statisticallineandshaperenderer, statisticallineandshaperenderer, stroke

The jfreechart StatisticalLineAndShapeRenderer.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2009, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ------------------------------------
 * StatisticalLineAndShapeRenderer.java
 * ------------------------------------
 * (C) Copyright 2005-2009, by Object Refinery Limited and Contributors.
 *
 * Original Author:  Mofeed Shahin;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *                   Peter Kolb (patch 2497611);
 *
 * Changes
 * -------
 * 01-Feb-2005 : Version 1, contributed by Mofeed Shahin (DG);
 * 16-Jun-2005 : Added errorIndicatorPaint to be consistent with
 *               StatisticalBarRenderer (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 11-Apr-2006 : Fixed bug 1468794, error bars drawn incorrectly when rendering
 *               plots with horizontal orientation (DG);
 * 25-Sep-2006 : Fixed bug 1562759, constructor ignoring arguments (DG);
 * 01-Jun-2007 : Return early from drawItem() method if item is not
 *               visible (DG);
 * 14-Jun-2007 : If the dataset is not a StatisticalCategoryDataset, revert
 *               to the drawing behaviour of LineAndShapeRenderer (DG);
 * 27-Sep-2007 : Added offset option to match new option in
 *               LineAndShapeRenderer (DG);
 * 14-Jan-2009 : Added support for seriesVisible flags (PK);
 * 23-Jan-2009 : Observe useFillPaint and drawOutlines flags (PK);
 * 23-Jan-2009 : In drawItem, divide code into passes (DG);
 * 05-Feb-2009 : Added errorIndicatorStroke field (DG);
 * 01-Apr-2009 : Added override for findRangeBounds(), and fixed NPE in
 *               creating item entities (DG);
 */

package org.jfree.chart.renderer.category;

import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import org.jfree.chart.HashUtilities;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.Range;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.statistics.StatisticalCategoryDataset;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.RectangleEdge;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PaintUtilities;
import org.jfree.util.PublicCloneable;
import org.jfree.util.ShapeUtilities;

/**
 * A renderer that draws shapes for each data item, and lines between data
 * items.  Each point has a mean value and a standard deviation line. For use
 * with the {@link CategoryPlot} class.  The example shown
 * here is generated by the <code>StatisticalLineChartDemo1.java program
 * included in the JFreeChart Demo Collection:
 * <br>
* <img src="../../../../../images/StatisticalLineRendererSample.png" * alt="StatisticalLineRendererSample.png" /> */ public class StatisticalLineAndShapeRenderer extends LineAndShapeRenderer implements Cloneable, PublicCloneable, Serializable { /** For serialization. */ private static final long serialVersionUID = -3557517173697777579L; /** The paint used to show the error indicator. */ private transient Paint errorIndicatorPaint; /** * The stroke used to draw the error indicators. If null, the renderer * will use the itemOutlineStroke. * * @since 1.0.13 */ private transient Stroke errorIndicatorStroke; /** * Constructs a default renderer (draws shapes and lines). */ public StatisticalLineAndShapeRenderer() { this(true, true); } /** * Constructs a new renderer. * * @param linesVisible draw lines? * @param shapesVisible draw shapes? */ public StatisticalLineAndShapeRenderer(boolean linesVisible, boolean shapesVisible) { super(linesVisible, shapesVisible); this.errorIndicatorPaint = null; this.errorIndicatorStroke = null; } /** * Returns the paint used for the error indicators. * * @return The paint used for the error indicators (possibly * <code>null). * * @see #setErrorIndicatorPaint(Paint) */ public Paint getErrorIndicatorPaint() { return this.errorIndicatorPaint; } /** * Sets the paint used for the error indicators (if <code>null, * the item paint is used instead) and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param paint the paint (<code>null permitted). * * @see #getErrorIndicatorPaint() */ public void setErrorIndicatorPaint(Paint paint) { this.errorIndicatorPaint = paint; fireChangeEvent(); } /** * Returns the stroke used for the error indicators. * * @return The stroke used for the error indicators (possibly * <code>null). * * @see #setErrorIndicatorStroke(Stroke) * * @since 1.0.13 */ public Stroke getErrorIndicatorStroke() { return this.errorIndicatorStroke; } /** * Sets the stroke used for the error indicators (if <code>null, * the item outline stroke is used instead) and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param stroke the stroke (<code>null permitted). * * @see #getErrorIndicatorStroke() * * @since 1.0.13 */ public void setErrorIndicatorStroke(Stroke stroke) { this.errorIndicatorStroke = stroke; fireChangeEvent(); } /** * Returns the range of values the renderer requires to display all the * items from the specified dataset. * * @param dataset the dataset (<code>null permitted). * * @return The range (or <code>null if the dataset is * <code>null or empty). */ public Range findRangeBounds(CategoryDataset dataset) { return findRangeBounds(dataset, true); } /** * Draw a single data item. * * @param g2 the graphics device. * @param state the renderer state. * @param dataArea the area in which the data is drawn. * @param plot the plot. * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param dataset the dataset (a {@link StatisticalCategoryDataset} is * required). * @param row the row index (zero-based). * @param column the column index (zero-based). * @param pass the pass. */ public void drawItem(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis, ValueAxis rangeAxis, CategoryDataset dataset, int row, int column, int pass) { // do nothing if item is not visible if (!getItemVisible(row, column)) { return; } // if the dataset is not a StatisticalCategoryDataset then just revert // to the superclass (LineAndShapeRenderer) behaviour... if (!(dataset instanceof StatisticalCategoryDataset)) { super.drawItem(g2, state, dataArea, plot, domainAxis, rangeAxis, dataset, row, column, pass); return; } int visibleRow = state.getVisibleSeriesIndex(row); if (visibleRow < 0) { return; } int visibleRowCount = state.getVisibleSeriesCount(); StatisticalCategoryDataset statDataset = (StatisticalCategoryDataset) dataset; Number meanValue = statDataset.getMeanValue(row, column); if (meanValue == null) { return; } PlotOrientation orientation = plot.getOrientation(); // current data point... double x1; if (getUseSeriesOffset()) { x1 = domainAxis.getCategorySeriesMiddle(column, dataset.getColumnCount(), visibleRow, visibleRowCount, getItemMargin(), dataArea, plot.getDomainAxisEdge()); } else { x1 = domainAxis.getCategoryMiddle(column, getColumnCount(), dataArea, plot.getDomainAxisEdge()); } double y1 = rangeAxis.valueToJava2D(meanValue.doubleValue(), dataArea, plot.getRangeAxisEdge()); // draw the standard deviation lines *before* the shapes (if they're // visible) - it looks better if the shape fill colour is different to // the line colour Number sdv = statDataset.getStdDevValue(row, column); if (pass == 1 && sdv != null) { //standard deviation lines RectangleEdge yAxisLocation = plot.getRangeAxisEdge(); double valueDelta = sdv.doubleValue(); double highVal, lowVal; if ((meanValue.doubleValue() + valueDelta) > rangeAxis.getRange().getUpperBound()) { highVal = rangeAxis.valueToJava2D( rangeAxis.getRange().getUpperBound(), dataArea, yAxisLocation); } else { highVal = rangeAxis.valueToJava2D(meanValue.doubleValue() + valueDelta, dataArea, yAxisLocation); } if ((meanValue.doubleValue() + valueDelta) < rangeAxis.getRange().getLowerBound()) { lowVal = rangeAxis.valueToJava2D( rangeAxis.getRange().getLowerBound(), dataArea, yAxisLocation); } else { lowVal = rangeAxis.valueToJava2D(meanValue.doubleValue() - valueDelta, dataArea, yAxisLocation); } if (this.errorIndicatorPaint != null) { g2.setPaint(this.errorIndicatorPaint); } else { g2.setPaint(getItemPaint(row, column)); } if (this.errorIndicatorStroke != null) { g2.setStroke(this.errorIndicatorStroke); } else { g2.setStroke(getItemOutlineStroke(row, column)); } Line2D line = new Line2D.Double(); if (orientation == PlotOrientation.HORIZONTAL) { line.setLine(lowVal, x1, highVal, x1); g2.draw(line); line.setLine(lowVal, x1 - 5.0d, lowVal, x1 + 5.0d); g2.draw(line); line.setLine(highVal, x1 - 5.0d, highVal, x1 + 5.0d); g2.draw(line); } else { // PlotOrientation.VERTICAL line.setLine(x1, lowVal, x1, highVal); g2.draw(line); line.setLine(x1 - 5.0d, highVal, x1 + 5.0d, highVal); g2.draw(line); line.setLine(x1 - 5.0d, lowVal, x1 + 5.0d, lowVal); g2.draw(line); } } Shape hotspot = null; if (pass == 1 && getItemShapeVisible(row, column)) { Shape shape = getItemShape(row, column); if (orientation == PlotOrientation.HORIZONTAL) { shape = ShapeUtilities.createTranslatedShape(shape, y1, x1); } else if (orientation == PlotOrientation.VERTICAL) { shape = ShapeUtilities.createTranslatedShape(shape, x1, y1); } hotspot = shape; if (getItemShapeFilled(row, column)) { if (getUseFillPaint()) { g2.setPaint(getItemFillPaint(row, column)); } else { g2.setPaint(getItemPaint(row, column)); } g2.fill(shape); } if (getDrawOutlines()) { if (getUseOutlinePaint()) { g2.setPaint(getItemOutlinePaint(row, column)); } else { g2.setPaint(getItemPaint(row, column)); } g2.setStroke(getItemOutlineStroke(row, column)); g2.draw(shape); } // draw the item label if there is one... if (isItemLabelVisible(row, column)) { if (orientation == PlotOrientation.HORIZONTAL) { drawItemLabel(g2, orientation, dataset, row, column, y1, x1, (meanValue.doubleValue() < 0.0)); } else if (orientation == PlotOrientation.VERTICAL) { drawItemLabel(g2, orientation, dataset, row, column, x1, y1, (meanValue.doubleValue() < 0.0)); } } } if (pass == 0 && getItemLineVisible(row, column)) { if (column != 0) { Number previousValue = statDataset.getValue(row, column - 1); if (previousValue != null) { // previous data point... double previous = previousValue.doubleValue(); double x0; if (getUseSeriesOffset()) { x0 = domainAxis.getCategorySeriesMiddle( column - 1, dataset.getColumnCount(), visibleRow, visibleRowCount, getItemMargin(), dataArea, plot.getDomainAxisEdge()); } else { x0 = domainAxis.getCategoryMiddle(column - 1, getColumnCount(), dataArea, plot.getDomainAxisEdge()); } double y0 = rangeAxis.valueToJava2D(previous, dataArea, plot.getRangeAxisEdge()); Line2D line = null; if (orientation == PlotOrientation.HORIZONTAL) { line = new Line2D.Double(y0, x0, y1, x1); } else if (orientation == PlotOrientation.VERTICAL) { line = new Line2D.Double(x0, y0, x1, y1); } g2.setPaint(getItemPaint(row, column)); g2.setStroke(getItemStroke(row, column)); g2.draw(line); } } } if (pass == 1) { // add an item entity, if this information is being collected EntityCollection entities = state.getEntityCollection(); if (entities != null) { addEntity(entities, hotspot, dataset, row, column, x1, y1); } } } /** * Tests this renderer for equality with an arbitrary object. * * @param obj the object (<code>null permitted). * * @return A boolean. */ public boolean equals(Object obj) { if (obj == this) { return true; } if (!(obj instanceof StatisticalLineAndShapeRenderer)) { return false; } StatisticalLineAndShapeRenderer that = (StatisticalLineAndShapeRenderer) obj; if (!PaintUtilities.equal(this.errorIndicatorPaint, that.errorIndicatorPaint)) { return false; } if (!ObjectUtilities.equal(this.errorIndicatorStroke, that.errorIndicatorStroke)) { return false; } return super.equals(obj); } /** * Returns a hash code for this instance. * * @return A hash code. */ public int hashCode() { int hash = super.hashCode(); hash = HashUtilities.hashCode(hash, this.errorIndicatorPaint); return hash; } /** * Provides serialization support. * * @param stream the output stream. * * @throws IOException if there is an I/O error. */ private void writeObject(ObjectOutputStream stream) throws IOException { stream.defaultWriteObject(); SerialUtilities.writePaint(this.errorIndicatorPaint, stream); SerialUtilities.writeStroke(this.errorIndicatorStroke, stream); } /** * Provides serialization support. * * @param stream the input stream. * * @throws IOException if there is an I/O error. * @throws ClassNotFoundException if there is a classpath problem. */ private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException { stream.defaultReadObject(); this.errorIndicatorPaint = SerialUtilities.readPaint(stream); this.errorIndicatorStroke = SerialUtilities.readStroke(stream); } }

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