home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

jfreechart example source code file (XYAreaRenderer2.java)

This example jfreechart source code file (XYAreaRenderer2.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, generalpath, geometry, io, legenditem, legenditem, paint, paint, polygon, shape, string, string, xyarearenderer2, xyarearenderer2, xydataset, xyitementity, xyplot

The jfreechart XYAreaRenderer2.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, 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.]
 *
 * --------------------
 * XYAreaRenderer2.java
 * --------------------
 * (C) Copyright 2004-2008, by Hari and Contributors.
 *
 * Original Author:  Hari (ourhari@hotmail.com);
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *                   Richard Atkinson;
 *                   Christian W. Zuckschwerdt;
 *
 * Changes:
 * --------
 * 03-Apr-2002 : Version 1, contributed by Hari.  This class is based on the
 *               StandardXYItemRenderer class (DG);
 * 09-Apr-2002 : Removed the translated zero from the drawItem method -
 *               overridden the initialise() method to calculate it (DG);
 * 30-May-2002 : Added tool tip generator to constructor to match super
 *               class (DG);
 * 25-Jun-2002 : Removed unnecessary local variable (DG);
 * 05-Aug-2002 : Small modification to drawItem method to support URLs for
 *               HTML image maps (RA);
 * 01-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 07-Nov-2002 : Renamed AreaXYItemRenderer --> XYAreaRenderer (DG);
 * 25-Mar-2003 : Implemented Serializable (DG);
 * 01-May-2003 : Modified drawItem() method signature (DG);
 * 27-Jul-2003 : Made line and polygon properties protected rather than
 *               private (RA);
 * 30-Jul-2003 : Modified entity constructor (CZ);
 * 20-Aug-2003 : Implemented Cloneable and PublicCloneable (DG);
 * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
 * 07-Oct-2003 : Added renderer state (DG);
 * 08-Dec-2003 : Modified hotspot for chart entity (DG);
 * 10-Feb-2004 : Changed the drawItem() method to make cut-and-paste
 *               overriding easier.  Also moved state class into this
 *               class (DG);
 * 25-Feb-2004 : Replaced CrosshairInfo with CrosshairState.  Renamed
 *               XYToolTipGenerator --> XYItemLabelGenerator (DG);
 * 15-Jul-2004 : Switched getX() with getXValue() and getY() with
 *               getYValue() (DG);
 * 11-Nov-2004 : Now uses ShapeUtilities to translate shapes (DG);
 * 19-Jan-2005 : Now accesses only primitives from the dataset (DG);
 * 21-Mar-2005 : Override getLegendItem() (DG);
 * 20-Apr-2005 : Use generators for legend tooltips and URLs (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 30-Nov-2006 : Fixed equals() and clone() implementations (DG);
 * 06-Feb-2007 : Fixed bug 1086307, crosshairs with multiple axes (DG);
 * 20-Apr-2007 : Updated getLegendItem() and drawItem() for renderer
 *               change (DG);
 * 17-May-2007 : Set datasetIndex and seriesIndex in getLegendItem() (DG);
 * 18-May-2007 : Set dataset and seriesKey for LegendItem (DG);
 * 17-Jun-2008 : Apply legend font and paint attributes (DG);
 *
 */

package org.jfree.chart.renderer.xy;

import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Polygon;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.GeneralPath;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import org.jfree.chart.LegendItem;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.entity.XYItemEntity;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.labels.XYSeriesLabelGenerator;
import org.jfree.chart.labels.XYToolTipGenerator;
import org.jfree.chart.plot.CrosshairState;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.urls.XYURLGenerator;
import org.jfree.data.xy.XYDataset;
import org.jfree.io.SerialUtilities;
import org.jfree.util.PublicCloneable;
import org.jfree.util.ShapeUtilities;

/**
 * Area item renderer for an {@link XYPlot}. The example shown here is
 * generated by the <code>XYAreaRenderer2Demo1.java program included in
 * the JFreeChart demo collection:
 * <br>
* <img src="../../../../../images/XYAreaRenderer2Sample.png" * alt="XYAreaRenderer2Sample.png" /> */ public class XYAreaRenderer2 extends AbstractXYItemRenderer implements XYItemRenderer, PublicCloneable { /** For serialization. */ private static final long serialVersionUID = -7378069681579984133L; /** A flag that controls whether or not the outline is shown. */ private boolean showOutline; /** * The shape used to represent an area in each legend item (this should * never be <code>null). */ private transient Shape legendArea; /** * Constructs a new renderer. */ public XYAreaRenderer2() { this(null, null); } /** * Constructs a new renderer. * * @param labelGenerator the tool tip generator to use. <code>null * is none. * @param urlGenerator the URL generator (null permitted). */ public XYAreaRenderer2(XYToolTipGenerator labelGenerator, XYURLGenerator urlGenerator) { super(); this.showOutline = false; setBaseToolTipGenerator(labelGenerator); setURLGenerator(urlGenerator); GeneralPath area = new GeneralPath(); area.moveTo(0.0f, -4.0f); area.lineTo(3.0f, -2.0f); area.lineTo(4.0f, 4.0f); area.lineTo(-4.0f, 4.0f); area.lineTo(-3.0f, -2.0f); area.closePath(); this.legendArea = area; } /** * Returns a flag that controls whether or not outlines of the areas are * drawn. * * @return The flag. * * @see #setOutline(boolean) */ public boolean isOutline() { return this.showOutline; } /** * Sets a flag that controls whether or not outlines of the areas are * drawn, and sends a {@link RendererChangeEvent} to all registered * listeners. * * @param show the flag. * * @see #isOutline() */ public void setOutline(boolean show) { this.showOutline = show; fireChangeEvent(); } /** * This method should not be used. * * @return <code>false always. * * @deprecated This method was included in the API by mistake and serves * no useful purpose. It has always returned <code>false. * */ public boolean getPlotLines() { return false; } /** * Returns the shape used to represent an area in the legend. * * @return The legend area (never <code>null). * * @see #setLegendArea(Shape) */ public Shape getLegendArea() { return this.legendArea; } /** * Sets the shape used as an area in each legend item and sends a * {@link RendererChangeEvent} to all registered listeners. * * @param area the area (<code>null not permitted). * * @see #getLegendArea() */ public void setLegendArea(Shape area) { if (area == null) { throw new IllegalArgumentException("Null 'area' argument."); } this.legendArea = area; fireChangeEvent(); } /** * Returns a default legend item for the specified series. Subclasses * should override this method to generate customised items. * * @param datasetIndex the dataset index (zero-based). * @param series the series index (zero-based). * * @return A legend item for the series. */ public LegendItem getLegendItem(int datasetIndex, int series) { LegendItem result = null; XYPlot xyplot = getPlot(); if (xyplot != null) { XYDataset dataset = xyplot.getDataset(datasetIndex); if (dataset != null) { XYSeriesLabelGenerator lg = getLegendItemLabelGenerator(); String label = lg.generateLabel(dataset, series); String description = label; String toolTipText = null; if (getLegendItemToolTipGenerator() != null) { toolTipText = getLegendItemToolTipGenerator().generateLabel( dataset, series); } String urlText = null; if (getLegendItemURLGenerator() != null) { urlText = getLegendItemURLGenerator().generateLabel( dataset, series); } Paint paint = lookupSeriesPaint(series); result = new LegendItem(label, description, toolTipText, urlText, this.legendArea, paint); result.setLabelFont(lookupLegendTextFont(series)); Paint labelPaint = lookupLegendTextPaint(series); if (labelPaint != null) { result.setLabelPaint(labelPaint); } result.setDataset(dataset); result.setDatasetIndex(datasetIndex); result.setSeriesKey(dataset.getSeriesKey(series)); result.setSeriesIndex(series); } } return result; } /** * Draws the visual representation of a single data item. * * @param g2 the graphics device. * @param state the renderer state. * @param dataArea the area within which the data is being drawn. * @param info collects information about the drawing. * @param plot the plot (can be used to obtain standard color * information etc). * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param dataset the dataset. * @param series the series index (zero-based). * @param item the item index (zero-based). * @param crosshairState crosshair information for the plot * (<code>null permitted). * @param pass the pass index. */ public void drawItem(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item, CrosshairState crosshairState, int pass) { if (!getItemVisible(series, item)) { return; } // get the data point... double x1 = dataset.getXValue(series, item); double y1 = dataset.getYValue(series, item); if (Double.isNaN(y1)) { y1 = 0.0; } double transX1 = domainAxis.valueToJava2D(x1, dataArea, plot.getDomainAxisEdge()); double transY1 = rangeAxis.valueToJava2D(y1, dataArea, plot.getRangeAxisEdge()); // get the previous point and the next point so we can calculate a // "hot spot" for the area (used by the chart entity)... double x0 = dataset.getXValue(series, Math.max(item - 1, 0)); double y0 = dataset.getYValue(series, Math.max(item - 1, 0)); if (Double.isNaN(y0)) { y0 = 0.0; } double transX0 = domainAxis.valueToJava2D(x0, dataArea, plot.getDomainAxisEdge()); double transY0 = rangeAxis.valueToJava2D(y0, dataArea, plot.getRangeAxisEdge()); int itemCount = dataset.getItemCount(series); double x2 = dataset.getXValue(series, Math.min(item + 1, itemCount - 1)); double y2 = dataset.getYValue(series, Math.min(item + 1, itemCount - 1)); if (Double.isNaN(y2)) { y2 = 0.0; } double transX2 = domainAxis.valueToJava2D(x2, dataArea, plot.getDomainAxisEdge()); double transY2 = rangeAxis.valueToJava2D(y2, dataArea, plot.getRangeAxisEdge()); double transZero = rangeAxis.valueToJava2D(0.0, dataArea, plot.getRangeAxisEdge()); Polygon hotspot = null; if (plot.getOrientation() == PlotOrientation.HORIZONTAL) { hotspot = new Polygon(); hotspot.addPoint((int) transZero, (int) ((transX0 + transX1) / 2.0)); hotspot.addPoint((int) ((transY0 + transY1) / 2.0), (int) ((transX0 + transX1) / 2.0)); hotspot.addPoint((int) transY1, (int) transX1); hotspot.addPoint((int) ((transY1 + transY2) / 2.0), (int) ((transX1 + transX2) / 2.0)); hotspot.addPoint((int) transZero, (int) ((transX1 + transX2) / 2.0)); } else { // vertical orientation hotspot = new Polygon(); hotspot.addPoint((int) ((transX0 + transX1) / 2.0), (int) transZero); hotspot.addPoint((int) ((transX0 + transX1) / 2.0), (int) ((transY0 + transY1) / 2.0)); hotspot.addPoint((int) transX1, (int) transY1); hotspot.addPoint((int) ((transX1 + transX2) / 2.0), (int) ((transY1 + transY2) / 2.0)); hotspot.addPoint((int) ((transX1 + transX2) / 2.0), (int) transZero); } PlotOrientation orientation = plot.getOrientation(); Paint paint = getItemPaint(series, item); Stroke stroke = getItemStroke(series, item); g2.setPaint(paint); g2.setStroke(stroke); // Check if the item is the last item for the series. // and number of items > 0. We can't draw an area for a single point. g2.fill(hotspot); // draw an outline around the Area. if (isOutline()) { g2.setStroke(lookupSeriesOutlineStroke(series)); g2.setPaint(lookupSeriesOutlinePaint(series)); g2.draw(hotspot); } int domainAxisIndex = plot.getDomainAxisIndex(domainAxis); int rangeAxisIndex = plot.getRangeAxisIndex(rangeAxis); updateCrosshairValues(crosshairState, x1, y1, domainAxisIndex, rangeAxisIndex, transX1, transY1, orientation); // collect entity and tool tip information... if (state.getInfo() != null) { EntityCollection entities = state.getEntityCollection(); if (entities != null && hotspot != null) { String tip = null; XYToolTipGenerator generator = getToolTipGenerator(series, item); if (generator != null) { tip = generator.generateToolTip(dataset, series, item); } String url = null; if (getURLGenerator() != null) { url = getURLGenerator().generateURL(dataset, series, item); } XYItemEntity entity = new XYItemEntity(hotspot, dataset, series, item, tip, url); entities.add(entity); } } } /** * Tests this renderer for equality with an arbitrary object. * * @param obj the object (<code>null not permitted). * * @return A boolean. */ public boolean equals(Object obj) { if (obj == this) { return true; } if (!(obj instanceof XYAreaRenderer2)) { return false; } XYAreaRenderer2 that = (XYAreaRenderer2) obj; if (this.showOutline != that.showOutline) { return false; } if (!ShapeUtilities.equal(this.legendArea, that.legendArea)) { return false; } return super.equals(obj); } /** * Returns a clone of the renderer. * * @return A clone. * * @throws CloneNotSupportedException if the renderer cannot be cloned. */ public Object clone() throws CloneNotSupportedException { XYAreaRenderer2 clone = (XYAreaRenderer2) super.clone(); clone.legendArea = ShapeUtilities.clone(this.legendArea); return clone; } /** * 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.legendArea = SerialUtilities.readShape(stream); } /** * 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.writeShape(this.legendArea, stream); } }

Other jfreechart examples (source code examples)

Here is a short list of links related to this jfreechart XYAreaRenderer2.java source code file:



my book on functional programming

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.