/* ===========================================================
* 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.]
*
* ----------------
* ValueMarker.java
* ----------------
* (C) Copyright 2004-2007, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 09-Feb-2004 : Version 1 (DG);
* 16-Feb-2005 : Added new constructor (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 05-Sep-2006 : Added setValue() method (DG);
* 08-Oct-2007 : Fixed bug 1808376, constructor calling super with incorrect
* values (DG);
*
*/
package org.jfree.chart.plot;
import java.awt.Paint;
import java.awt.Stroke;
import org.jfree.chart.event.MarkerChangeEvent;
/**
* A marker that represents a single value. Markers can be added to plots to
* highlight specific values.
*/
public class ValueMarker extends Marker {
/** The value. */
private double value;
/**
* Creates a new marker.
*
* @param value the value.
*/
public ValueMarker(double value) {
super();
this.value = value;
}
/**
* Creates a new marker.
*
* @param value the value.
* @param paint the paint (<code>null</code> not permitted).
* @param stroke the stroke (<code>null</code> not permitted).
*/
public ValueMarker(double value, Paint paint, Stroke stroke) {
this(value, paint, stroke, paint, stroke, 1.0f);
}
/**
* Creates a new value marker.
*
* @param value the value.
* @param paint the paint (<code>null</code> not permitted).
* @param stroke the stroke (<code>null</code> not permitted).
* @param outlinePaint the outline paint (<code>null</code> permitted).
* @param outlineStroke the outline stroke (<code>null</code> permitted).
* @param alpha the alpha transparency (in the range 0.0f to 1.0f).
*/
public ValueMarker(double value, Paint paint, Stroke stroke,
Paint outlinePaint, Stroke outlineStroke, float alpha) {
super(paint, stroke, outlinePaint, outlineStroke, alpha);
this.value = value;
}
/**
* Returns the value.
*
* @return The value.
*
* @see #setValue(double)
*/
public double getValue() {
return this.value;
}
/**
* Sets the value for the marker and sends a {@link MarkerChangeEvent} to
* all registered listeners.
*
* @param value the value.
*
* @see #getValue()
*
* @since 1.0.3
*/
public void setValue(double value) {
this.value = value;
notifyListeners(new MarkerChangeEvent(this));
}
/**
* Tests this marker for equality with an arbitrary object. This method
* returns <code>true</code> if:
*
* <ul>
* <li><code>obj</code> is not <code>null</code>;</li>
* <li><code>obj</code> is an instance of <code>ValueMarker</code>;</li>
* <li><code>obj</code> has the same value as this marker;</li>
* <li><code>super.equals(obj)</code> returns <code>true</code>.</li>
* </ul>
*
* @param obj the object (<code>null</code> permitted).
*
* @return A boolean.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!super.equals(obj)) {
return false;
}
if (!(obj instanceof ValueMarker)) {
return false;
}
ValueMarker that = (ValueMarker) obj;
if (this.value != that.value) {
return false;
}
return true;
}
}
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