arcdialframe.java

提供JFreechart图表功能, 提供JFreechart图表功能,提供JFreechart图表功能

/* ===========================================================
 * 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.]
 *
 * -----------------
 * ArcDialFrame.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);
 * 08-Mar-2007 : Fix in hashCode() (DG);
 * 17-Oct-2007 : Updated equals() (DG);
 * 24-Oct-2007 : Added argument checks and API docs, and renamed 
 *               StandardDialFrame --> ArcDialFrame (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.Shape;
import java.awt.Stroke;
import java.awt.geom.Arc2D;
import java.awt.geom.Area;
import java.awt.geom.GeneralPath;
import java.awt.geom.Point2D;
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 standard frame for the {@link DialPlot} class.
 * 
 * @since 1.0.7
 */
public class ArcDialFrame extends AbstractDialLayer implements DialFrame, 
        Cloneable, PublicCloneable, Serializable {
    
    /** For serialization. */
    static final long serialVersionUID = -4089176959553523499L;

    /**
     * The color used for the front of the panel.  This field is transient
     * because it requires special handling for serialization.
     */
    private transient Paint backgroundPaint;
    
    /**
     * The color used for the border around the window. This field is transient
     * because it requires special handling for serialization.
     */
    private transient Paint foregroundPaint;
    
    /**
     * The stroke for drawing the frame outline.  This field is transient
     * because it requires special handling for serialization.
     */
    private transient Stroke stroke;
       
    /**
     * The start angle.
     */
    private double startAngle;
    
    /**
     * The end angle.
     */
    private double extent;
    
    /** The inner radius, relative to the framing rectangle. */
    private double innerRadius;
    
    /** The outer radius, relative to the framing rectangle. */
    private double outerRadius;
   
    /** 
     * Creates a new instance of <code>ArcDialFrame</code> that spans
     * 180 degrees. 
     */
    public ArcDialFrame() {
        this(0, 180);
    }
    
    /**
     * Creates a new instance of <code>ArcDialFrame</code> that spans
     * the arc specified.
     *
     * @param startAngle  the startAngle (in degrees).
     * @param extent  the extent of the arc (in degrees, counter-clockwise).
     */
    public ArcDialFrame(double startAngle, double extent) {
        this.backgroundPaint = Color.gray;
        this.foregroundPaint = new Color(100, 100, 150);
        this.stroke = new BasicStroke(2.0f);
        this.innerRadius = 0.25;
        this.outerRadius = 0.75;
        this.startAngle = startAngle;
        this.extent = extent;        
    }
    
    /**
     * Returns the background paint (never <code>null</code>).
     * 
     * @return The background paint.
     * 
     * @see #setBackgroundPaint(Paint)
     */
    public Paint getBackgroundPaint() {
        return this.backgroundPaint;
    }
    
    /**
     * Sets the background paint and sends a {@link DialLayerChangeEvent} to 
     * all registered listeners.
     * 
     * @param paint  the paint (<code>null</code> not permitted).
     * 
     * @see #getBackgroundPaint()
     */
    public void setBackgroundPaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.backgroundPaint = paint;
        notifyListeners(new DialLayerChangeEvent(this));
    }
    
    /**
     * Returns the foreground paint.
     * 
     * @return The foreground paint (never <code>null</code>).
     * 
     * @see #setForegroundPaint(Paint)
     */
    public Paint getForegroundPaint() {
        return this.foregroundPaint;
    }
    
    /**
     * Sets the foreground paint and sends a {@link DialLayerChangeEvent} to 
     * all registered listeners.
     * 
     * @param paint  the paint (<code>null</code> not permitted).
     * 
     * @see #getForegroundPaint()
     */
    public void setForegroundPaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.foregroundPaint = paint;
        notifyListeners(new DialLayerChangeEvent(this));
    }
    
    /**
     * Returns the stroke.
     * 
     * @return The stroke (never <code>null</code>).
     * 
     * @see #setStroke(Stroke)
     */
    public Stroke getStroke() {
        return this.stroke;
    }
    
    /**
     * Sets the stroke and sends a {@link DialLayerChangeEvent} to 
     * all registered listeners.
     * 
     * @param stroke  the stroke (<code>null</code> not permitted).
     * 
     * @see #getStroke()
     */
    public void setStroke(Stroke stroke) {
        if (stroke == null) { 
            throw new IllegalArgumentException("Null 'stroke' argument.");
        }
        this.stroke = stroke;
        notifyListeners(new DialLayerChangeEvent(this));
    }

    /**
     * Returns the inner radius, relative to the framing rectangle.
     *
     * @return The inner radius. 
     * 
     * @see #setInnerRadius(double)
     */
    public double getInnerRadius() {
        return this.innerRadius;
    }
    
    /**
     * Sets the inner radius and sends a {@link DialLayerChangeEvent} to 
     * all registered listeners.
     *
     * @param radius  the inner radius.
     * 
     * @see #getInnerRadius()
     */
    public void setInnerRadius(double radius) {
        if (radius < 0.0) {
            throw new IllegalArgumentException("Negative 'radius' argument.");
        }
        this.innerRadius = radius;
        notifyListeners(new DialLayerChangeEvent(this));
    }
    
    /**
     * Returns the outer radius, relative to the framing rectangle.
     *
     * @return The outer radius.
     * 
     * @see #setOuterRadius(double)
     */
    public double getOuterRadius() {
        return this.outerRadius;
    }
    
    /**
     * Sets the outer radius and sends a {@link DialLayerChangeEvent} to 
     * all registered listeners.
     *
     * @param radius  the outer radius.