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jfreechart example source code file (CategoryMarker.java)

This example jfreechart source code file (CategoryMarker.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, categorymarker, categorymarker, cloneable, comparable, comparable, illegalargumentexception, io, marker, markerchangeevent, null, paint, paint, serializable, stroke, stroke

The jfreechart CategoryMarker.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.]
 *
 * -------------------
 * CategoryMarker.java
 * -------------------
 * (C) Copyright 2005-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Nicolas Brodu;
 *
 * Changes
 * -------
 * 20-May-2005 : Version 1 (DG);
 * 19-Aug-2005 : Implemented equals(), fixed bug in constructor (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 05-Sep-2006 : Added MarkerChangeListener support (DG);
 *
 */

package org.jfree.chart.plot;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Paint;
import java.awt.Stroke;
import java.io.Serializable;

import org.jfree.chart.event.MarkerChangeEvent;
import org.jfree.ui.LengthAdjustmentType;

/**
 * A marker for a category.
 * <br>
* Note that for serialization to work correctly, the category key must be an * instance of a serializable class. * * @see CategoryPlot#addDomainMarker(CategoryMarker) */ public class CategoryMarker extends Marker implements Cloneable, Serializable { /** The category key. */ private Comparable key; /** * A hint that the marker should be drawn as a line rather than a region. */ private boolean drawAsLine = false; /** * Creates a new category marker for the specified category. * * @param key the category key. */ public CategoryMarker(Comparable key) { this(key, Color.gray, new BasicStroke(1.0f)); } /** * Creates a new category marker. * * @param key the key. * @param paint the paint (<code>null not permitted). * @param stroke the stroke (<code>null not permitted). */ public CategoryMarker(Comparable key, Paint paint, Stroke stroke) { this(key, paint, stroke, paint, stroke, 1.0f); } /** * Creates a new category marker. * * @param key the key. * @param paint the paint (<code>null not permitted). * @param stroke the stroke (<code>null not permitted). * @param outlinePaint the outline paint (<code>null permitted). * @param outlineStroke the outline stroke (<code>null permitted). * @param alpha the alpha transparency. */ public CategoryMarker(Comparable key, Paint paint, Stroke stroke, Paint outlinePaint, Stroke outlineStroke, float alpha) { super(paint, stroke, outlinePaint, outlineStroke, alpha); this.key = key; setLabelOffsetType(LengthAdjustmentType.EXPAND); } /** * Returns the key. * * @return The key. */ public Comparable getKey() { return this.key; } /** * Sets the key and sends a {@link MarkerChangeEvent} to all registered * listeners. * * @param key the key (<code>null not permitted). * * @since 1.0.3 */ public void setKey(Comparable key) { if (key == null) { throw new IllegalArgumentException("Null 'key' argument."); } this.key = key; notifyListeners(new MarkerChangeEvent(this)); } /** * Returns the flag that controls whether the marker is drawn as a region * or a line. * * @return A line. */ public boolean getDrawAsLine() { return this.drawAsLine; } /** * Sets the flag that controls whether the marker is drawn as a region or * as a line, and sends a {@link MarkerChangeEvent} to all registered * listeners. * * @param drawAsLine the flag. */ public void setDrawAsLine(boolean drawAsLine) { this.drawAsLine = drawAsLine; notifyListeners(new MarkerChangeEvent(this)); } /** * Tests the marker for equality with an arbitrary object. * * @param obj the object (<code>null permitted). * * @return A boolean. */ public boolean equals(Object obj) { if (obj == null) { return false; } if (!(obj instanceof CategoryMarker)) { return false; } if (!super.equals(obj)) { return false; } CategoryMarker that = (CategoryMarker) obj; if (!this.key.equals(that.key)) { return false; } if (this.drawAsLine != that.drawAsLine) { return false; } return true; } }

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