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jfreechart example source code file (Marker.java)

This example jfreechart source code file (Marker.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, event, eventlistenerlist, font, gui, illegalargumentexception, illegalargumentexception, io, marker, marker, markerchangeevent, markerchangeevent, null, null, paint, rectangleinsets, stroke, swing, textanchor, util

The jfreechart Marker.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.]
 *
 * -----------
 * Marker.java
 * -----------
 * (C) Copyright 2002-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Nicolas Brodu;
 *
 * Changes
 * -------
 * 02-Jul-2002 : Added extra constructor, standard header and Javadoc
 *               comments (DG);
 * 20-Aug-2002 : Added the outline stroke attribute (DG);
 * 02-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 16-Oct-2002 : Added new constructor (DG);
 * 26-Mar-2003 : Implemented Serializable (DG);
 * 21-May-2003 : Added labels (DG);
 * 11-Sep-2003 : Implemented Cloneable (NB);
 * 05-Nov-2003 : Added checks to ensure some attributes are never null (DG);
 * 11-Feb-2003 : Moved to org.jfree.chart.plot package, plus significant API
 *               changes to support IntervalMarker in plots (DG);
 * 14-Jun-2004 : Updated equals() method (DG);
 * 21-Jan-2005 : Added settings to control direction of horizontal and
 *               vertical label offsets (DG);
 * 01-Jun-2005 : Modified to use only one label offset type - this will be
 *               applied to the domain or range axis as appropriate (DG);
 * 06-Jun-2005 : Fix equals() method to handle GradientPaint (DG);
 * 19-Aug-2005 : Changed constructor from public --> protected (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 05-Sep-2006 : Added MarkerChangeListener support (DG);
 * 26-Sep-2007 : Fix for serialization bug 1802195 (DG);
 *
 */

package org.jfree.chart.plot;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Paint;
import java.awt.Stroke;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.EventListener;

import javax.swing.event.EventListenerList;

import org.jfree.chart.event.MarkerChangeEvent;
import org.jfree.chart.event.MarkerChangeListener;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.LengthAdjustmentType;
import org.jfree.ui.RectangleAnchor;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.TextAnchor;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PaintUtilities;

/**
 * The base class for markers that can be added to plots to highlight a value
 * or range of values.
 * <br>
* An event notification mechanism was added to this class in JFreeChart * version 1.0.3. */ public abstract class Marker implements Cloneable, Serializable { /** For serialization. */ private static final long serialVersionUID = -734389651405327166L; /** The paint (null is not allowed). */ private transient Paint paint; /** The stroke (null is not allowed). */ private transient Stroke stroke; /** The outline paint. */ private transient Paint outlinePaint; /** The outline stroke. */ private transient Stroke outlineStroke; /** The alpha transparency. */ private float alpha; /** The label. */ private String label = null; /** The label font. */ private Font labelFont; /** The label paint. */ private transient Paint labelPaint; /** The label position. */ private RectangleAnchor labelAnchor; /** The text anchor for the label. */ private TextAnchor labelTextAnchor; /** The label offset from the marker rectangle. */ private RectangleInsets labelOffset; /** * The offset type for the domain or range axis (never <code>null). */ private LengthAdjustmentType labelOffsetType; /** Storage for registered change listeners. */ private transient EventListenerList listenerList; /** * Creates a new marker with default attributes. */ protected Marker() { this(Color.gray); } /** * Constructs a new marker. * * @param paint the paint (<code>null not permitted). */ protected Marker(Paint paint) { this(paint, new BasicStroke(0.5f), Color.gray, new BasicStroke(0.5f), 0.80f); } /** * Constructs a new marker. * * @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 (must be in the range 0.0f to * 1.0f). * * @throws IllegalArgumentException if <code>paint or * <code>stroke is null, or alpha is * not in the specified range. */ protected Marker(Paint paint, Stroke stroke, Paint outlinePaint, Stroke outlineStroke, float alpha) { if (paint == null) { throw new IllegalArgumentException("Null 'paint' argument."); } if (stroke == null) { throw new IllegalArgumentException("Null 'stroke' argument."); } if (alpha < 0.0f || alpha > 1.0f) throw new IllegalArgumentException( "The 'alpha' value must be in the range 0.0f to 1.0f"); this.paint = paint; this.stroke = stroke; this.outlinePaint = outlinePaint; this.outlineStroke = outlineStroke; this.alpha = alpha; this.labelFont = new Font("SansSerif", Font.PLAIN, 9); this.labelPaint = Color.black; this.labelAnchor = RectangleAnchor.TOP_LEFT; this.labelOffset = new RectangleInsets(3.0, 3.0, 3.0, 3.0); this.labelOffsetType = LengthAdjustmentType.CONTRACT; this.labelTextAnchor = TextAnchor.CENTER; this.listenerList = new EventListenerList(); } /** * Returns the paint. * * @return The paint (never <code>null). * * @see #setPaint(Paint) */ public Paint getPaint() { return this.paint; } /** * Sets the paint and sends a {@link MarkerChangeEvent} to all registered * listeners. * * @param paint the paint (<code>null not permitted). * * @see #getPaint() */ public void setPaint(Paint paint) { if (paint == null) { throw new IllegalArgumentException("Null 'paint' argument."); } this.paint = paint; notifyListeners(new MarkerChangeEvent(this)); } /** * Returns the stroke. * * @return The stroke (never <code>null). * * @see #setStroke(Stroke) */ public Stroke getStroke() { return this.stroke; } /** * Sets the stroke and sends a {@link MarkerChangeEvent} to all registered * listeners. * * @param stroke the stroke (<code>null not permitted). * * @see #getStroke() */ public void setStroke(Stroke stroke) { if (stroke == null) { throw new IllegalArgumentException("Null 'stroke' argument."); } this.stroke = stroke; notifyListeners(new MarkerChangeEvent(this)); } /** * Returns the outline paint. * * @return The outline paint (possibly <code>null). * * @see #setOutlinePaint(Paint) */ public Paint getOutlinePaint() { return this.outlinePaint; } /** * Sets the outline paint and sends a {@link MarkerChangeEvent} to all * registered listeners. * * @param paint the paint (<code>null permitted). * * @see #getOutlinePaint() */ public void setOutlinePaint(Paint paint) { this.outlinePaint = paint; notifyListeners(new MarkerChangeEvent(this)); } /** * Returns the outline stroke. * * @return The outline stroke (possibly <code>null). * * @see #setOutlineStroke(Stroke) */ public Stroke getOutlineStroke() { return this.outlineStroke; } /** * Sets the outline stroke and sends a {@link MarkerChangeEvent} to all * registered listeners. * * @param stroke the stroke (<code>null permitted). * * @see #getOutlineStroke() */ public void setOutlineStroke(Stroke stroke) { this.outlineStroke = stroke; notifyListeners(new MarkerChangeEvent(this)); } /** * Returns the alpha transparency. * * @return The alpha transparency. * * @see #setAlpha(float) */ public float getAlpha() { return this.alpha; } /** * Sets the alpha transparency that should be used when drawing the * marker, and sends a {@link MarkerChangeEvent} to all registered * listeners. The alpha transparency is a value in the range 0.0f * (completely transparent) to 1.0f (completely opaque). * * @param alpha the alpha transparency (must be in the range 0.0f to * 1.0f). * * @throws IllegalArgumentException if <code>alpha is not in the * specified range. * * @see #getAlpha() */ public void setAlpha(float alpha) { if (alpha < 0.0f || alpha > 1.0f) throw new IllegalArgumentException( "The 'alpha' value must be in the range 0.0f to 1.0f"); this.alpha = alpha; notifyListeners(new MarkerChangeEvent(this)); } /** * Returns the label (if <code>null no label is displayed). * * @return The label (possibly <code>null). * * @see #setLabel(String) */ public String getLabel() { return this.label; } /** * Sets the label (if <code>null no label is displayed) and sends a * {@link MarkerChangeEvent} to all registered listeners. * * @param label the label (<code>null permitted). * * @see #getLabel() */ public void setLabel(String label) { this.label = label; notifyListeners(new MarkerChangeEvent(this)); } /** * Returns the label font. * * @return The label font (never <code>null). * * @see #setLabelFont(Font) */ public Font getLabelFont() { return this.labelFont; } /** * Sets the label font and sends a {@link MarkerChangeEvent} to all * registered listeners. * * @param font the font (<code>null not permitted). * * @see #getLabelFont() */ public void setLabelFont(Font font) { if (font == null) { throw new IllegalArgumentException("Null 'font' argument."); } this.labelFont = font; notifyListeners(new MarkerChangeEvent(this)); } /** * Returns the label paint. * * @return The label paint (never </code>null). * * @see #setLabelPaint(Paint) */ public Paint getLabelPaint() { return this.labelPaint; } /** * Sets the label paint and sends a {@link MarkerChangeEvent} to all * registered listeners. * * @param paint the paint (<code>null not permitted). * * @see #getLabelPaint() */ public void setLabelPaint(Paint paint) { if (paint == null) { throw new IllegalArgumentException("Null 'paint' argument."); } this.labelPaint = paint; notifyListeners(new MarkerChangeEvent(this)); } /** * Returns the label anchor. This defines the position of the label * anchor, relative to the bounds of the marker. * * @return The label anchor (never <code>null). * * @see #setLabelAnchor(RectangleAnchor) */ public RectangleAnchor getLabelAnchor() { return this.labelAnchor; } /** * Sets the label anchor and sends a {@link MarkerChangeEvent} to all * registered listeners. The anchor defines the position of the label * anchor, relative to the bounds of the marker. * * @param anchor the anchor (<code>null not permitted). * * @see #getLabelAnchor() */ public void setLabelAnchor(RectangleAnchor anchor) { if (anchor == null) { throw new IllegalArgumentException("Null 'anchor' argument."); } this.labelAnchor = anchor; notifyListeners(new MarkerChangeEvent(this)); } /** * Returns the label offset. * * @return The label offset (never <code>null). * * @see #setLabelOffset(RectangleInsets) */ public RectangleInsets getLabelOffset() { return this.labelOffset; } /** * Sets the label offset and sends a {@link MarkerChangeEvent} to all * registered listeners. * * @param offset the label offset (<code>null not permitted). * * @see #getLabelOffset() */ public void setLabelOffset(RectangleInsets offset) { if (offset == null) { throw new IllegalArgumentException("Null 'offset' argument."); } this.labelOffset = offset; notifyListeners(new MarkerChangeEvent(this)); } /** * Returns the label offset type. * * @return The type (never <code>null). * * @see #setLabelOffsetType(LengthAdjustmentType) */ public LengthAdjustmentType getLabelOffsetType() { return this.labelOffsetType; } /** * Sets the label offset type and sends a {@link MarkerChangeEvent} to all * registered listeners. * * @param adj the type (<code>null not permitted). * * @see #getLabelOffsetType() */ public void setLabelOffsetType(LengthAdjustmentType adj) { if (adj == null) { throw new IllegalArgumentException("Null 'adj' argument."); } this.labelOffsetType = adj; notifyListeners(new MarkerChangeEvent(this)); } /** * Returns the label text anchor. * * @return The label text anchor (never <code>null). * * @see #setLabelTextAnchor(TextAnchor) */ public TextAnchor getLabelTextAnchor() { return this.labelTextAnchor; } /** * Sets the label text anchor and sends a {@link MarkerChangeEvent} to * all registered listeners. * * @param anchor the label text anchor (<code>null not permitted). * * @see #getLabelTextAnchor() */ public void setLabelTextAnchor(TextAnchor anchor) { if (anchor == null) { throw new IllegalArgumentException("Null 'anchor' argument."); } this.labelTextAnchor = anchor; notifyListeners(new MarkerChangeEvent(this)); } /** * Registers an object for notification of changes to the marker. * * @param listener the object to be registered. * * @see #removeChangeListener(MarkerChangeListener) * * @since 1.0.3 */ public void addChangeListener(MarkerChangeListener listener) { this.listenerList.add(MarkerChangeListener.class, listener); } /** * Unregisters an object for notification of changes to the marker. * * @param listener the object to be unregistered. * * @see #addChangeListener(MarkerChangeListener) * * @since 1.0.3 */ public void removeChangeListener(MarkerChangeListener listener) { this.listenerList.remove(MarkerChangeListener.class, listener); } /** * Notifies all registered listeners that the marker has been modified. * * @param event information about the change event. * * @since 1.0.3 */ public void notifyListeners(MarkerChangeEvent event) { Object[] listeners = this.listenerList.getListenerList(); for (int i = listeners.length - 2; i >= 0; i -= 2) { if (listeners[i] == MarkerChangeListener.class) { ((MarkerChangeListener) listeners[i + 1]).markerChanged(event); } } } /** * Returns an array containing all the listeners of the specified type. * * @param listenerType the listener type. * * @return The array of listeners. * * @since 1.0.3 */ public EventListener[] getListeners(Class listenerType) { return this.listenerList.getListeners(listenerType); } /** * 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 == this) { return true; } if (!(obj instanceof Marker)) { return false; } Marker that = (Marker) obj; if (!PaintUtilities.equal(this.paint, that.paint)) { return false; } if (!ObjectUtilities.equal(this.stroke, that.stroke)) { return false; } if (!PaintUtilities.equal(this.outlinePaint, that.outlinePaint)) { return false; } if (!ObjectUtilities.equal(this.outlineStroke, that.outlineStroke)) { return false; } if (this.alpha != that.alpha) { return false; } if (!ObjectUtilities.equal(this.label, that.label)) { return false; } if (!ObjectUtilities.equal(this.labelFont, that.labelFont)) { return false; } if (!PaintUtilities.equal(this.labelPaint, that.labelPaint)) { return false; } if (this.labelAnchor != that.labelAnchor) { return false; } if (this.labelTextAnchor != that.labelTextAnchor) { return false; } if (!ObjectUtilities.equal(this.labelOffset, that.labelOffset)) { return false; } if (!this.labelOffsetType.equals(that.labelOffsetType)) { return false; } return true; } /** * Creates a clone of the marker. * * @return A clone. * * @throws CloneNotSupportedException never. */ 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.writePaint(this.paint, stream); SerialUtilities.writeStroke(this.stroke, stream); SerialUtilities.writePaint(this.outlinePaint, stream); SerialUtilities.writeStroke(this.outlineStroke, stream); SerialUtilities.writePaint(this.labelPaint, 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.paint = SerialUtilities.readPaint(stream); this.stroke = SerialUtilities.readStroke(stream); this.outlinePaint = SerialUtilities.readPaint(stream); this.outlineStroke = SerialUtilities.readStroke(stream); this.labelPaint = SerialUtilities.readPaint(stream); this.listenerList = new EventListenerList(); } }

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