valuemarker.java

来自「JfreeChart 常用图表例子」· Java 代码 · 共 125 行

/* ===========================================================
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ----------------
 * ValueMarker.java
 * ----------------
 * (C) Copyright 2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: ValueMarker.java,v 1.3 2005/02/22 13:16:29 mungady Exp $
 *
 * Changes
 * -------
 * 09-Feb-2004 : Version 1 (DG);
 * 16-Feb-2005 : Added new constructor (DG);
 */

package org.jfree.chart.plot;

import java.awt.Paint;
import java.awt.Stroke;

/**
 * A marker that represents a single fixed value.
 */
public class ValueMarker extends Marker {
    
    /** The constant 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.
     */
    public ValueMarker(double value, Paint paint, Stroke stroke, 
                       Paint outlinePaint, Stroke outlineStroke, float alpha) {
        super(paint, stroke, paint, stroke, alpha);
        this.value = value;
    }
    
    /**
     * Returns the value.
     *
     * @return The value.
     */
    public double getValue() {
        return this.value;
    }

    /**
     * Compares this marker against 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 (!super.equals(obj)) {
            return false;
        }
        if (!(obj instanceof ValueMarker)) {
            return false;
        }
        ValueMarker that = (ValueMarker) obj;
        if (this.value != that.value) {
            return false;
        }
        return true;
    }
}