/* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2005, 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.] * * ----------------------- * ChartRenderingInfo.java * ----------------------- * (C) Copyright 2002-2005, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: ChartRenderingInfo.java,v 1.4.2.3 2005/11/30 11:48:25 mungady Exp $ * * Changes * ------- * 22-Jan-2002 : Version 1 (DG); * 05-Feb-2002 : Added a new constructor, completed Javadoc comments (DG); * 05-Mar-2002 : Added a clear() method (DG); * 23-May-2002 : Renamed DrawInfo --> ChartRenderingInfo (DG); * 26-Sep-2002 : Fixed errors reported by Checkstyle (DG); * 17-Sep-2003 : Added PlotRenderingInfo (DG); * 01-Nov-2005 : Updated equals() method (DG); * 30-Nov-2005 : Removed get/setPlotArea() (DG); * */ package org.jfree.chart; 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.entity.EntityCollection; import org.jfree.chart.entity.StandardEntityCollection; import org.jfree.chart.plot.PlotRenderingInfo; import org.jfree.io.SerialUtilities; import org.jfree.util.ObjectUtilities; /** * A structure for storing rendering information from one call to the * JFreeChart.draw() method. *
* An instance of the {@link JFreeChart} class can draw itself within an
* arbitrary rectangle on any Graphics2D
. It is assumed that
* client code will sometimes render the same chart in more than one view, so
* the {@link JFreeChart} instance does not retain any information about its
* rendered dimensions. This information can be useful sometimes, so you have
* the option to collect the information at each call to
* JFreeChart.draw()
, by passing an instance of this
* ChartRenderingInfo
class.
*/
public class ChartRenderingInfo implements Cloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = 2751952018173406822L;
/** The area in which the chart is drawn. */
private transient Rectangle2D chartArea;
/** Rendering info for the chart's plot (and subplots, if any). */
private PlotRenderingInfo plotInfo;
/**
* Storage for the chart entities. Since retaining entity information for
* charts with a large number of data points consumes a lot of memory, it
* is intended that you can set this to null
to prevent the
* information being collected.
*/
private EntityCollection entities;
/**
* Constructs a new ChartRenderingInfo structure that can be used to
* collect information about the dimensions of a rendered chart.
*/
public ChartRenderingInfo() {
this(new StandardEntityCollection());
}
/**
* Constructs a new instance. If an entity collection is supplied, it will
* be populated with information about the entities in a chart. If it is
* null
, no entity information (including tool tips) will
* be collected.
*
* @param entities an entity collection (null
permitted).
*/
public ChartRenderingInfo(EntityCollection entities) {
this.chartArea = new Rectangle2D.Double();
this.plotInfo = new PlotRenderingInfo(this);
this.entities = entities;
}
/**
* Returns the area in which the chart was drawn.
*
* @return The area in which the chart was drawn.
*/
public Rectangle2D getChartArea() {
return this.chartArea;
}
/**
* Sets the area in which the chart was drawn.
*
* @param area the chart area.
*/
public void setChartArea(Rectangle2D area) {
this.chartArea.setRect(area);
}
/**
* Returns the collection of entities maintained by this instance.
*
* @return The entity collection (possibly null
.
*/
public EntityCollection getEntityCollection() {
return this.entities;
}
/**
* Sets the entity collection.
*
* @param entities the entity collection (null
permitted).
*/
public void setEntityCollection(EntityCollection entities) {
this.entities = entities;
}
/**
* Clears the information recorded by this object.
*/
public void clear() {
this.chartArea.setRect(0.0, 0.0, 0.0, 0.0);
this.plotInfo = new PlotRenderingInfo(this);
if (this.entities != null) {
this.entities.clear();
}
}
/**
* Returns the rendering info for the chart's plot.
*
* @return The rendering info for the plot.
*/
public PlotRenderingInfo getPlotInfo() {
return this.plotInfo;
}
/**
* Tests this object for equality with an arbitrary object.
*
* @param obj the object to test against (null
permitted).
*
* @return A boolean.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof ChartRenderingInfo)) {
return false;
}
ChartRenderingInfo that = (ChartRenderingInfo) obj;
if (!ObjectUtilities.equal(this.chartArea, that.chartArea)) {
return false;
}
if (!ObjectUtilities.equal(this.plotInfo, that.plotInfo)) {
return false;
}
return true;
}
/**
* Returns a clone of this object.
*
* @return A clone.
*
* @throws CloneNotSupportedException if the object cannot be cloned.
*/
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
/**
* 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.chartArea, 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.chartArea = (Rectangle2D) SerialUtilities.readShape(stream);
}
}