/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2007, 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.]
*
* -------------------
* PieLabelRecord.java
* -------------------
* (C) Copyright 2004, 2007, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 08-Mar-2004 : Version 1 (DG);
* 14-Jun-2007 : Implemented Serializable, updated API docs (DG);
* 21-Nov-2007 : Implemented equals() to shut up FindBugs (DG);
*
*/
package org.jfree.chart.plot;
import java.io.Serializable;
import org.jfree.text.TextBox;
/**
* A structure that retains information about the label for a section in a pie
* chart.
*/
public class PieLabelRecord implements Comparable, Serializable {
/** The section key. */
private Comparable key;
/** The angle of the centre of the section (in radians). */
private double angle;
/** The base y-coordinate. */
private double baseY;
/** The allocated y-coordinate. */
private double allocatedY;
/** The label. */
private TextBox label;
/** The label height. */
private double labelHeight;
/** The gap. */
private double gap;
/** The link percent. */
private double linkPercent;
/**
* Creates a new record.
*
* @param key the section key.
* @param angle the angle to the middle of the section (in radians).
* @param baseY the base y-coordinate.
* @param label the section label.
* @param labelHeight the label height (in Java2D units).
* @param gap the offset to the left.
* @param linkPercent the link percent.
*/
public PieLabelRecord(Comparable key, double angle, double baseY,
TextBox label, double labelHeight, double gap,
double linkPercent) {
this.key = key;
this.angle = angle;
this.baseY = baseY;
this.allocatedY = baseY;
this.label = label;
this.labelHeight = labelHeight;
this.gap = gap;
this.linkPercent = linkPercent;
}
/**
* Returns the base y-coordinate. This is where the label will appear if
* there is no overlapping of labels.
*
* @return The base y-coordinate.
*/
public double getBaseY() {
return this.baseY;
}
/**
* Sets the base y-coordinate.
*
* @param base the base y-coordinate.
*/
public void setBaseY(double base) {
this.baseY = base;
}
/**
* Returns the lower bound of the label.
*
* @return The lower bound.
*/
public double getLowerY() {
return this.allocatedY - this.labelHeight / 2.0;
}
/**
* Returns the upper bound of the label.
*
* @return The upper bound.
*/
public double getUpperY() {
return this.allocatedY + this.labelHeight / 2.0;
}
/**
* Returns the angle of the middle of the section, in radians.
*
* @return The angle, in radians.
*/
public double getAngle() {
return this.angle;
}
/**
* Returns the key for the section that the label applies to.
*
* @return The key.
*/
public Comparable getKey() {
return this.key;
}
/**
* Returns the label.
*
* @return The label.
*/
public TextBox getLabel() {
return this.label;
}
/**
* Returns the label height (you could derive this from the label itself,
* but we cache the value so it can be retrieved quickly).
*
* @return The label height (in Java2D units).
*/
public double getLabelHeight() {
return this.labelHeight;
}
/**
* Returns the allocated y-coordinate.
*
* @return The allocated y-coordinate.
*/
public double getAllocatedY() {
return this.allocatedY;
}
/**
* Sets the allocated y-coordinate.
*
* @param y the y-coordinate.
*/
public void setAllocatedY(double y) {
this.allocatedY = y;
}
/**
* Returns the gap.
*
* @return The gap.
*/
public double getGap() {
return this.gap;
}
/**
* Returns the link percent.
*
* @return The link percent.
*/
public double getLinkPercent() {
return this.linkPercent;
}
/**
* Compares this object to an arbitrary object.
*
* @param obj the object to compare against.
*
* @return An integer that specifies the relative order of the two objects.
*/
public int compareTo(Object obj) {
int result = 0;
if (obj instanceof PieLabelRecord) {
PieLabelRecord plr = (PieLabelRecord) obj;
if (this.baseY < plr.baseY) {
result = -1;
}
else if (this.baseY > plr.baseY) {
result = 1;
}
}
return result;
}
/**
* Tests this record for equality with 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 (!(obj instanceof PieLabelRecord)) {
return false;
}
PieLabelRecord that = (PieLabelRecord) obj;
if (!this.key.equals(that.key)) {
return false;
}
if (this.angle != that.angle) {
return false;
}
if (this.gap != that.gap) {
return false;
}
if (this.allocatedY != that.allocatedY) {
return false;
}
if (this.baseY != that.baseY) {
return false;
}
if (this.labelHeight != that.labelHeight) {
return false;
}
if (this.linkPercent != that.linkPercent) {
return false;
}
if (!this.label.equals(that.label)) {
return false;
}
return true;
}
/**
* Returns a string describing the object. This is used for debugging only.
*
* @return A string.
*/
public String toString() {
return this.baseY + ", " + this.key.toString();
}
}
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