/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2007, 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.]
*
* -------------------------
* AbstractXYAnnotation.java
* -------------------------
* (C) Copyright 2004-2007, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes:
* --------
* 29-Sep-2004 : Version 1 (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 06-Mar-2007 : Implemented hashCode() (DG);
*
*/
package org.jfree.chart.annotations;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.Rectangle2D;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.entity.XYAnnotationEntity;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.plot.XYPlot;
import org.jfree.util.ObjectUtilities;
/**
* The interface that must be supported by annotations that are to be added to
* an {@link XYPlot}.
*/
public abstract class AbstractXYAnnotation implements XYAnnotation {
/** The tool tip text. */
private String toolTipText;
/** The URL. */
private String url;
/**
* Creates a new instance that has no tool tip or URL specified.
*/
protected AbstractXYAnnotation() {
this.toolTipText = null;
this.url = null;
}
/**
* Returns the tool tip text for the annotation. This will be displayed in
* a {@link org.jfree.chart.ChartPanel} when the mouse pointer hovers over
* the annotation.
*
* @return The tool tip text (possibly <code>null</code>).
*
* @see #setToolTipText(String)
*/
public String getToolTipText() {
return this.toolTipText;
}
/**
* Sets the tool tip text for the annotation.
*
* @param text the tool tip text (<code>null</code> permitted).
*
* @see #getToolTipText()
*/
public void setToolTipText(String text) {
this.toolTipText = text;
}
/**
* Returns the URL for the annotation. This URL will be used to provide
* hyperlinks when an HTML image map is created for the chart.
*
* @return The URL (possibly <code>null</code>).
*
* @see #setURL(String)
*/
public String getURL() {
return this.url;
}
/**
* Sets the URL for the annotation.
*
* @param url the URL (<code>null</code> permitted).
*
* @see #getURL()
*/
public void setURL(String url) {
this.url = url;
}
/**
* Draws the annotation.
*
* @param g2 the graphics device.
* @param plot the plot.
* @param dataArea the data area.
* @param domainAxis the domain axis.
* @param rangeAxis the range axis.
* @param rendererIndex the renderer index.
* @param info if supplied, this info object will be populated with
* entity information.
*/
public abstract void draw(Graphics2D g2, XYPlot plot, Rectangle2D dataArea,
ValueAxis domainAxis, ValueAxis rangeAxis,
int rendererIndex,
PlotRenderingInfo info);
/**
* A utility method for adding an {@link XYAnnotationEntity} to
* a {@link PlotRenderingInfo} instance.
*
* @param info the plot rendering info (<code>null</code> permitted).
* @param hotspot the hotspot area.
* @param rendererIndex the renderer index.
* @param toolTipText the tool tip text.
* @param urlText the URL text.
*/
protected void addEntity(PlotRenderingInfo info,
Shape hotspot, int rendererIndex,
String toolTipText, String urlText) {
if (info == null) {
return;
}
EntityCollection entities = info.getOwner().getEntityCollection();
if (entities == null) {
return;
}
XYAnnotationEntity entity = new XYAnnotationEntity(hotspot,
rendererIndex, toolTipText, urlText);
entities.add(entity);
}
/**
* Tests this annotation for equality with an arbitrary object.
*
* @param obj the object (<code>null</code> permitted).
*
* @return A boolean.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof AbstractXYAnnotation)) {
return false;
}
AbstractXYAnnotation that = (AbstractXYAnnotation) obj;
if (!ObjectUtilities.equal(this.toolTipText, that.toolTipText)) {
return false;
}
if (!ObjectUtilities.equal(this.url, that.url)) {
return false;
}
return true;
}
/**
* Returns a hash code for this instance.
*
* @return A hash code.
*/
public int hashCode() {
int result = 193;
if (this.toolTipText != null) {
result = 37 * result + this.toolTipText.hashCode();
}
if (this.url != null) {
result = 37 * result + this.url.hashCode();
}
return result;
}
}
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