/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2011, 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.]
*
* -------------------------
* ExtendedCategoryAxis.java
* -------------------------
* (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 07-Nov-2003 : Version 1 (DG);
* 07-Jan-2004 : Updated the createLabel() method (DG);
* 29-Jan-2004 : Added paint attribute (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 21-Mar-2007 : Implemented equals(), clone() and fixed serialization (DG);
*
*/
package org.jfree.chart.axis;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.HashMap;
import java.util.Map;
import org.jfree.chart.event.AxisChangeEvent;
import org.jfree.io.SerialUtilities;
import org.jfree.text.TextBlock;
import org.jfree.text.TextFragment;
import org.jfree.text.TextLine;
import org.jfree.ui.RectangleEdge;
import org.jfree.util.PaintUtilities;
/**
* An extended version of the {@link CategoryAxis} class that supports
* sublabels on the axis.
*/
public class ExtendedCategoryAxis extends CategoryAxis {
/** For serialization. */
static final long serialVersionUID = -3004429093959826567L;
/** Storage for the sublabels. */
private Map sublabels;
/** The sublabel font. */
private Font sublabelFont;
/** The sublabel paint. */
private transient Paint sublabelPaint;
/**
* Creates a new axis.
*
* @param label the axis label.
*/
public ExtendedCategoryAxis(String label) {
super(label);
this.sublabels = new HashMap();
this.sublabelFont = new Font("SansSerif", Font.PLAIN, 10);
this.sublabelPaint = Color.black;
}
/**
* Returns the font for the sublabels.
*
* @return The font (never <code>null</code>).
*
* @see #setSubLabelFont(Font)
*/
public Font getSubLabelFont() {
return this.sublabelFont;
}
/**
* Sets the font for the sublabels and sends an {@link AxisChangeEvent} to
* all registered listeners.
*
* @param font the font (<code>null</code> not permitted).
*
* @see #getSubLabelFont()
*/
public void setSubLabelFont(Font font) {
if (font == null) {
throw new IllegalArgumentException("Null 'font' argument.");
}
this.sublabelFont = font;
notifyListeners(new AxisChangeEvent(this));
}
/**
* Returns the paint for the sublabels.
*
* @return The paint (never <code>null</code>).
*
* @see #setSubLabelPaint(Paint)
*/
public Paint getSubLabelPaint() {
return this.sublabelPaint;
}
/**
* Sets the paint for the sublabels and sends an {@link AxisChangeEvent}
* to all registered listeners.
*
* @param paint the paint (<code>null</code> not permitted).
*
* @see #getSubLabelPaint()
*/
public void setSubLabelPaint(Paint paint) {
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.sublabelPaint = paint;
notifyListeners(new AxisChangeEvent(this));
}
/**
* Adds a sublabel for a category.
*
* @param category the category.
* @param label the label.
*/
public void addSubLabel(Comparable category, String label) {
this.sublabels.put(category, label);
}
/**
* Overrides the default behaviour by adding the sublabel to the text
* block that is used for the category label.
*
* @param category the category.
* @param width the width (not used yet).
* @param edge the location of the axis.
* @param g2 the graphics device.
*
* @return A label.
*/
protected TextBlock createLabel(Comparable category, float width,
RectangleEdge edge, Graphics2D g2) {
TextBlock label = super.createLabel(category, width, edge, g2);
String s = (String) this.sublabels.get(category);
if (s != null) {
if (edge == RectangleEdge.TOP || edge == RectangleEdge.BOTTOM) {
TextLine line = new TextLine(s, this.sublabelFont,
this.sublabelPaint);
label.addLine(line);
}
else if (edge == RectangleEdge.LEFT
|| edge == RectangleEdge.RIGHT) {
TextLine line = label.getLastLine();
if (line != null) {
line.addFragment(new TextFragment(" " + s,
this.sublabelFont, this.sublabelPaint));
}
}
}
return label;
}
/**
* Tests this axis 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 ExtendedCategoryAxis)) {
return false;
}
ExtendedCategoryAxis that = (ExtendedCategoryAxis) obj;
if (!this.sublabelFont.equals(that.sublabelFont)) {
return false;
}
if (!PaintUtilities.equal(this.sublabelPaint, that.sublabelPaint)) {
return false;
}
if (!this.sublabels.equals(that.sublabels)) {
return false;
}
return super.equals(obj);
}
/**
* Returns a clone of this axis.
*
* @return A clone.
*
* @throws CloneNotSupportedException if there is a problem cloning.
*/
public Object clone() throws CloneNotSupportedException {
ExtendedCategoryAxis clone = (ExtendedCategoryAxis) super.clone();
clone.sublabels = new HashMap(this.sublabels);
return 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.sublabelPaint, 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.sublabelPaint = SerialUtilities.readPaint(stream);
}
}