/* ===========================================================
* 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.]
*
* ------------
* DialCap.java
* ------------
* (C) Copyright 2006, 2007, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 03-Nov-2006 : Version 1 (DG);
* 17-Oct-2007 : Updated equals() method (DG);
*
*/
package org.jfree.chart.plot.dial;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Stroke;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import org.jfree.chart.HashUtilities;
import org.jfree.io.SerialUtilities;
import org.jfree.util.PaintUtilities;
import org.jfree.util.PublicCloneable;
/**
* A regular dial layer that can be used to draw a cap over the center of
* the dial (the base of the dial pointer(s)).
*
* @since 1.0.7
*/
public class DialCap extends AbstractDialLayer implements DialLayer, Cloneable,
PublicCloneable, Serializable {
/** For serialization. */
static final long serialVersionUID = -2929484264982524463L;
/**
* The radius of the cap, as a percentage of the framing rectangle.
*/
private double radius;
/**
* The fill paint. This field is transient because it requires special
* handling for serialization.
*/
private transient Paint fillPaint;
/**
* The paint used to draw the cap outline (this should never be
* <code>null</code>). This field is transient because it requires
* special handling for serialization.
*/
private transient Paint outlinePaint;
/**
* The stroke used to draw the cap outline (this should never be
* <code>null</code>). This field is transient because it requires
* special handling for serialization.
*/
private transient Stroke outlineStroke;
/**
* Creates a new instance of <code>StandardDialBackground</code>. The
* default background paint is <code>Color.white</code>.
*/
public DialCap() {
this.radius = 0.05;
this.fillPaint = Color.white;
this.outlinePaint = Color.black;
this.outlineStroke = new BasicStroke(2.0f);
}
/**
* Returns the radius of the cap, as a percentage of the dial's framing
* rectangle.
*
* @return The radius.
*
* @see #setRadius(double)
*/
public double getRadius() {
return this.radius;
}
/**
* Sets the radius of the cap, as a percentage of the dial's framing
* rectangle, and sends a {@link DialLayerChangeEvent} to all registered
* listeners.
*
* @param radius the radius (must be greater than zero).
*
* @see #getRadius()
*/
public void setRadius(double radius) {
if (radius <= 0.0) {
throw new IllegalArgumentException("Requires radius > 0.0.");
}
this.radius = radius;
notifyListeners(new DialLayerChangeEvent(this));
}
/**
* Returns the paint used to fill the cap.
*
* @return The paint (never <code>null</code>).
*
* @see #setFillPaint(Paint)
*/
public Paint getFillPaint() {
return this.fillPaint;
}
/**
* Sets the paint for the cap background and sends a
* {@link DialLayerChangeEvent} to all registered listeners.
*
* @param paint the paint (<code>null</code> not permitted).
*
* @see #getFillPaint()
*/
public void setFillPaint(Paint paint) {
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.fillPaint = paint;
notifyListeners(new DialLayerChangeEvent(this));
}
/**
* Returns the paint used to draw the outline of the cap.
*
* @return The paint (never <code>null</code>).
*
* @see #setOutlinePaint(Paint)
*/
public Paint getOutlinePaint() {
return this.outlinePaint;
}
/**
* Sets the paint used to draw the outline of the cap and sends a
* {@link DialLayerChangeEvent} to all registered listeners.
*
* @param paint the paint (<code>null</code> not permitted).
*
* @see #getOutlinePaint()
*/
public void setOutlinePaint(Paint paint) {
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.outlinePaint = paint;
notifyListeners(new DialLayerChangeEvent(this));
}
/**
* Returns the stroke used to draw the outline of the cap.
*
* @return The stroke (never <code>null</code>).
*
* @see #setOutlineStroke(Stroke)
*/
public Stroke getOutlineStroke() {
return this.outlineStroke;
}
/**
* Sets the stroke used to draw the outline of the cap and sends a
* {@link DialLayerChangeEvent} to all registered listeners.
*
* @param stroke the stroke (<code>null</code> not permitted).
*
* @see #getOutlineStroke()
*/
public void setOutlineStroke(Stroke stroke) {
if (stroke == null) {
throw new IllegalArgumentException("Null 'stroke' argument.");
}
this.outlineStroke = stroke;
notifyListeners(new DialLayerChangeEvent(this));
}
/**
* Returns <code>true</code> to indicate that this layer should be
* clipped within the dial window.
*
* @return <code>true</code>.
*/
public boolean isClippedToWindow() {
return true;
}
/**
* Draws the background to the specified graphics device. If the dial
* frame specifies a window, the clipping region will already have been
* set to this window before this method is called.
*
* @param g2 the graphics device (<code>null</code> not permitted).
* @param plot the plot (ignored here).
* @param frame the dial frame (ignored here).
* @param view the view rectangle (<code>null</code> not permitted).
*/
public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame,
Rectangle2D view) {
g2.setPaint(this.fillPaint);
Rectangle2D f = DialPlot.rectangleByRadius(frame, this.radius,
this.radius);
Ellipse2D e = new Ellipse2D.Double(f.getX(), f.getY(), f.getWidth(),
f.getHeight());
g2.fill(e);
g2.setPaint(this.outlinePaint);
g2.setStroke(this.outlineStroke);
g2.draw(e);
}
/**
* Tests this instance 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 DialCap)) {
return false;
}
DialCap that = (DialCap) obj;
if (this.radius != that.radius) {
return false;
}
if (!PaintUtilities.equal(this.fillPaint, that.fillPaint)) {
return false;
}
if (!PaintUtilities.equal(this.outlinePaint, that.outlinePaint)) {
return false;
}
if (!this.outlineStroke.equals(that.outlineStroke)) {
return false;
}
return super.equals(obj);
}
/**
* Returns a hash code for this instance.
*
* @return The hash code.
*/
public int hashCode() {
int result = 193;
result = 37 * result + HashUtilities.hashCodeForPaint(this.fillPaint);
result = 37 * result + HashUtilities.hashCodeForPaint(
this.outlinePaint);
result = 37 * result + this.outlineStroke.hashCode();
return result;
}
/**
* Returns a clone of this instance.
*
* @return A clone.
*
* @throws CloneNotSupportedException if some attribute of the cap cannot
* be cloned.
*/
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.fillPaint, stream);
SerialUtilities.writePaint(this.outlinePaint, stream);
SerialUtilities.writeStroke(this.outlineStroke, 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.fillPaint = SerialUtilities.readPaint(stream);
this.outlinePaint = SerialUtilities.readPaint(stream);
this.outlineStroke = SerialUtilities.readStroke(stream);
}
}
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