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JFreeChart is a class library, written in Java, for generating charts.
Utilising the Java2D APIs, it currently supports bar charts, pie charts,
line charts, XY-plots and time series plots.
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2013, 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.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* -------------------
* TextAnnotation.java
* -------------------
* (C) Copyright 2002-2013, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): Peter Kolb (patch 2809117);
* Martin Hoeller;
*
* Changes:
* --------
* 28-Aug-2002 : Version 1 (DG);
* 07-Nov-2002 : Fixed errors reported by Checkstyle, added accessor
* methods (DG);
* 13-Jan-2003 : Reviewed Javadocs (DG);
* 26-Mar-2003 : Implemented Serializable (DG);
* 02-Jun-2003 : Added anchor and rotation settings (DG);
* 19-Aug-2003 : Added equals() method and implemented Cloneable (DG);
* 29-Sep-2004 : Updated equals() method (DG);
* 06-Jun-2005 : Fixed equals() method to work with GradientPaint (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 16-Jan-2007 : Added argument checks, fixed hashCode() method and updated
* API docs (DG);
* 24-Jun-2009 : Fire change events (see patch 2809117 by PK) (DG);
* 28-Oct-2011 : Added missing argument check, Bug #3428870 (MH);
* 01-Jul-2013 : Added missing AnnotationChangeEvent for setText() (DG);
*
*/
package org.jfree.chart.annotations;
import java.awt.Color;
import java.awt.Font;
import java.awt.Paint;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import org.jfree.chart.HashUtilities;
import org.jfree.chart.event.AnnotationChangeEvent;
import org.jfree.chart.util.ParamChecks;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.TextAnchor;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PaintUtilities;
/**
* A base class for text annotations. This class records the content but not
* the location of the annotation.
*/
public class TextAnnotation extends AbstractAnnotation implements Serializable {
/** For serialization. */
private static final long serialVersionUID = 7008912287533127432L;
/** The default font. */
public static final Font DEFAULT_FONT
= new Font("SansSerif", Font.PLAIN, 10);
/** The default paint. */
public static final Paint DEFAULT_PAINT = Color.black;
/** The default text anchor. */
public static final TextAnchor DEFAULT_TEXT_ANCHOR = TextAnchor.CENTER;
/** The default rotation anchor. */
public static final TextAnchor DEFAULT_ROTATION_ANCHOR = TextAnchor.CENTER;
/** The default rotation angle. */
public static final double DEFAULT_ROTATION_ANGLE = 0.0;
/** The text. */
private String text;
/** The font. */
private Font font;
/** The paint. */
private transient Paint paint;
/** The text anchor. */
private TextAnchor textAnchor;
/** The rotation anchor. */
private TextAnchor rotationAnchor;
/** The rotation angle. */
private double rotationAngle;
/**
* Creates a text annotation with default settings.
*
* @param text the text (null not permitted).
*/
protected TextAnnotation(String text) {
super();
ParamChecks.nullNotPermitted(text, "text");
this.text = text;
this.font = DEFAULT_FONT;
this.paint = DEFAULT_PAINT;
this.textAnchor = DEFAULT_TEXT_ANCHOR;
this.rotationAnchor = DEFAULT_ROTATION_ANCHOR;
this.rotationAngle = DEFAULT_ROTATION_ANGLE;
}
/**
* Returns the text for the annotation.
*
* @return The text (never null).
*
* @see #setText(String)
*/
public String getText() {
return this.text;
}
/**
* Sets the text for the annotation and sends an
* {@link AnnotationChangeEvent} to all registered listeners.
*
* @param text the text (null not permitted).
*
* @see #getText()
*/
public void setText(String text) {
ParamChecks.nullNotPermitted(text, "text");
this.text = text;
fireAnnotationChanged();
}
/**
* Returns the font for the annotation.
*
* @return The font (never null).
*
* @see #setFont(Font)
*/
public Font getFont() {
return this.font;
}
/**
* Sets the font for the annotation and sends an
* {@link AnnotationChangeEvent} to all registered listeners.
*
* @param font the font (null not permitted).
*
* @see #getFont()
*/
public void setFont(Font font) {
ParamChecks.nullNotPermitted(font, "font");
this.font = font;
fireAnnotationChanged();
}
/**
* Returns the paint for the annotation.
*
* @return The paint (never null).
*
* @see #setPaint(Paint)
*/
public Paint getPaint() {
return this.paint;
}
/**
* Sets the paint for the annotation and sends an
* {@link AnnotationChangeEvent} to all registered listeners.
*
* @param paint the paint (null not permitted).
*
* @see #getPaint()
*/
public void setPaint(Paint paint) {
ParamChecks.nullNotPermitted(paint, "paint");
this.paint = paint;
fireAnnotationChanged();
}
/**
* Returns the text anchor.
*
* @return The text anchor.
*
* @see #setTextAnchor(TextAnchor)
*/
public TextAnchor getTextAnchor() {
return this.textAnchor;
}
/**
* Sets the text anchor (the point on the text bounding rectangle that is
* aligned to the (x, y) coordinate of the annotation) and sends an
* {@link AnnotationChangeEvent} to all registered listeners.
*
* @param anchor the anchor point (null not permitted).
*
* @see #getTextAnchor()
*/
public void setTextAnchor(TextAnchor anchor) {
ParamChecks.nullNotPermitted(anchor, "anchor");
this.textAnchor = anchor;
fireAnnotationChanged();
}
/**
* Returns the rotation anchor.
*
* @return The rotation anchor point (never null).
*
* @see #setRotationAnchor(TextAnchor)
*/
public TextAnchor getRotationAnchor() {
return this.rotationAnchor;
}
/**
* Sets the rotation anchor point and sends an
* {@link AnnotationChangeEvent} to all registered listeners.
*
* @param anchor the anchor (null not permitted).
*
* @see #getRotationAnchor()
*/
public void setRotationAnchor(TextAnchor anchor) {
ParamChecks.nullNotPermitted(anchor, "anchor");
this.rotationAnchor = anchor;
fireAnnotationChanged();
}
/**
* Returns the rotation angle in radians.
*
* @return The rotation angle.
*
* @see #setRotationAngle(double)
*/
public double getRotationAngle() {
return this.rotationAngle;
}
/**
* Sets the rotation angle and sends an {@link AnnotationChangeEvent} to
* all registered listeners. The angle is measured clockwise in radians.
*
* @param angle the angle (in radians).
*
* @see #getRotationAngle()
*/
public void setRotationAngle(double angle) {
this.rotationAngle = angle;
fireAnnotationChanged();
}
/**
* Tests this object for equality with an arbitrary object.
*
* @param obj the object (null permitted).
*
* @return true or false.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
// now try to reject equality...
if (!(obj instanceof TextAnnotation)) {
return false;
}
TextAnnotation that = (TextAnnotation) obj;
if (!ObjectUtilities.equal(this.text, that.getText())) {
return false;
}
if (!ObjectUtilities.equal(this.font, that.getFont())) {
return false;
}
if (!PaintUtilities.equal(this.paint, that.getPaint())) {
return false;
}
if (!ObjectUtilities.equal(this.textAnchor, that.getTextAnchor())) {
return false;
}
if (!ObjectUtilities.equal(this.rotationAnchor,
that.getRotationAnchor())) {
return false;
}
if (this.rotationAngle != that.getRotationAngle()) {
return false;
}
// seem to be the same...
return true;
}
/**
* Returns a hash code for this instance.
*
* @return A hash code.
*/
@Override
public int hashCode() {
int result = 193;
result = 37 * result + this.font.hashCode();
result = 37 * result + HashUtilities.hashCodeForPaint(this.paint);
result = 37 * result + this.rotationAnchor.hashCode();
long temp = Double.doubleToLongBits(this.rotationAngle);
result = 37 * result + (int) (temp ^ (temp >>> 32));
result = 37 * result + this.text.hashCode();
result = 37 * result + this.textAnchor.hashCode();
return result;
}
/**
* 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);
}
/**
* 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);
}
}