org.jfree.chart.annotations.TextAnnotation Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jfreechart Show documentation
Show all versions of jfreechart Show documentation
JFreeChart is a class library, written in Java, for generating charts.
Utilising the Java2D API, it supports a wide range of chart types including
bar charts, pie charts, line charts, XY-plots, time series plots, Sankey charts
and more.
The newest version!
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-present, by David Gilbert 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-present, by David Gilbert and Contributors.
*
* Original Author: David Gilbert;
* Contributor(s): Peter Kolb (patch 2809117);
* Martin Hoeller;
* Tracy Hiltbrand (equals/hashCode comply with EqualsVerifier);
*
*/
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 java.util.Objects;
import org.jfree.chart.HashUtils;
import org.jfree.chart.event.AnnotationChangeEvent;
import org.jfree.chart.ui.TextAnchor;
import org.jfree.chart.util.PaintUtils;
import org.jfree.chart.util.Args;
import org.jfree.chart.util.SerialUtils;
/**
* 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 ({@code null} not permitted).
*/
protected TextAnnotation(String text) {
super();
Args.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 {@code 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 ({@code null} not permitted).
*
* @see #getText()
*/
public void setText(String text) {
Args.nullNotPermitted(text, "text");
this.text = text;
fireAnnotationChanged();
}
/**
* Returns the font for the annotation.
*
* @return The font (never {@code 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 ({@code null} not permitted).
*
* @see #getFont()
*/
public void setFont(Font font) {
Args.nullNotPermitted(font, "font");
this.font = font;
fireAnnotationChanged();
}
/**
* Returns the paint for the annotation.
*
* @return The paint (never {@code 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 ({@code null} not permitted).
*
* @see #getPaint()
*/
public void setPaint(Paint paint) {
Args.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 ({@code null} not permitted).
*
* @see #getTextAnchor()
*/
public void setTextAnchor(TextAnchor anchor) {
Args.nullNotPermitted(anchor, "anchor");
this.textAnchor = anchor;
fireAnnotationChanged();
}
/**
* Returns the rotation anchor.
*
* @return The rotation anchor point (never {@code 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 ({@code null} not permitted).
*
* @see #getRotationAnchor()
*/
public void setRotationAnchor(TextAnchor anchor) {
Args.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 ({@code null} permitted).
*
* @return {@code true} or {@code 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 (!Objects.equals(this.text, that.getText())) {
return false;
}
if (!Objects.equals(this.font, that.getFont())) {
return false;
}
if (!PaintUtils.equal(this.paint, that.getPaint())) {
return false;
}
if (!Objects.equals(this.textAnchor, that.getTextAnchor())) {
return false;
}
if (!Objects.equals(this.rotationAnchor, that.getRotationAnchor())) {
return false;
}
if (Double.doubleToLongBits(this.rotationAngle) !=
Double.doubleToLongBits(that.rotationAngle)) {
return false;
}
// fix the "equals not symmetric" problem
if (!that.canEqual(this)) {
return false;
}
return super.equals(obj);
}
/**
* Ensures symmetry between super/subclass implementations of equals. For
* more detail, see http://jqno.nl/equalsverifier/manual/inheritance.
*
* @param other Object
*
* @return true ONLY if the parameter is THIS class type
*/
@Override
public boolean canEqual(Object other) {
// fix the "equals not symmetric" problem
return (other instanceof TextAnnotation);
}
/**
* Returns a hash code for this instance.
*
* @return A hash code.
*/
@Override
public int hashCode() {
int result = super.hashCode(); // equals calls superclass, hashCode must also
result = 37 * result + Objects.hashCode(this.font);
result = 37 * result + HashUtils.hashCodeForPaint(this.paint);
result = 37 * result + Objects.hashCode(this.rotationAnchor);
long temp = Double.doubleToLongBits(this.rotationAngle);
result = 37 * result + (int) (temp ^ (temp >>> 32));
result = 37 * result + Objects.hashCode(this.text);
result = 37 * result + Objects.hashCode(this.textAnchor);
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();
SerialUtils.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 = SerialUtils.readPaint(stream);
}
}