001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
006 *
007 * Project Info:  http://www.jfree.org/jfreechart/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
022 * USA.
023 *
024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025 * in the United States and other countries.]
026 *
027 * ---------------
028 * LongNeedle.java
029 * ---------------
030 * (C) Copyright 2002-2008, by the Australian Antarctic Division and
031 *                          Contributors.
032 *
033 * Original Author:  Bryan Scott (for the Australian Antarctic Division);
034 * Contributor(s):   David Gilbert (for Object Refinery Limited);
035 *
036 * Changes:
037 * --------
038 * 25-Sep-2002 : Version 1, contributed by Bryan Scott (DG);
039 * 27-Mar-2003 : Implemented Serializable (DG);
040 * 09-Sep-2003 : Added equals() method (DG);
041 * 16-Mar-2004 : Implemented Rotation;
042 * 22-Nov-2007 : Implemented hashCode() (DG);
043 *
044 */
045
046package org.jfree.chart.needle;
047
048import java.awt.Graphics2D;
049import java.awt.Shape;
050import java.awt.geom.GeneralPath;
051import java.awt.geom.Point2D;
052import java.awt.geom.Rectangle2D;
053import java.io.Serializable;
054
055/**
056 * A needle that is represented by a long line.
057 */
058public class LongNeedle extends MeterNeedle
059                        implements Cloneable, Serializable {
060
061    /** For serialization. */
062    private static final long serialVersionUID = -4319985779783688159L;
063
064    /**
065     * Default constructor.
066     */
067    public LongNeedle() {
068        super();
069        setRotateY(0.8);
070    }
071
072    /**
073     * Draws the needle.
074     *
075     * @param g2  the graphics device.
076     * @param plotArea  the plot area.
077     * @param rotate  the rotation point.
078     * @param angle  the angle.
079     */
080    protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea,
081                              Point2D rotate, double angle) {
082
083        GeneralPath shape1 = new GeneralPath();
084        GeneralPath shape2 = new GeneralPath();
085        GeneralPath shape3 = new GeneralPath();
086
087        float minX = (float) plotArea.getMinX();
088        float minY = (float) plotArea.getMinY();
089        float maxX = (float) plotArea.getMaxX();
090        float maxY = (float) plotArea.getMaxY();
091        //float midX = (float) (minX + (plotArea.getWidth() * getRotateX()));
092        //float midY = (float) (minY + (plotArea.getHeight() * getRotateY()));
093        float midX = (float) (minX + (plotArea.getWidth() * 0.5));
094        float midY = (float) (minY + (plotArea.getHeight() * 0.8));
095        float y = maxY - (2 * (maxY - midY));
096        if (y < minY) {
097            y = minY;
098        }
099        shape1.moveTo(minX, midY);
100        shape1.lineTo(midX, minY);
101        shape1.lineTo(midX, y);
102        shape1.closePath();
103
104        shape2.moveTo(maxX, midY);
105        shape2.lineTo(midX, minY);
106        shape2.lineTo(midX, y);
107        shape2.closePath();
108
109        shape3.moveTo(minX, midY);
110        shape3.lineTo(midX, maxY);
111        shape3.lineTo(maxX, midY);
112        shape3.lineTo(midX, y);
113        shape3.closePath();
114
115        Shape s1 = shape1;
116        Shape s2 = shape2;
117        Shape s3 = shape3;
118
119        if ((rotate != null) && (angle != 0)) {
120            /// we have rotation huston, please spin me
121            getTransform().setToRotation(angle, rotate.getX(), rotate.getY());
122            s1 = shape1.createTransformedShape(transform);
123            s2 = shape2.createTransformedShape(transform);
124            s3 = shape3.createTransformedShape(transform);
125        }
126
127
128        if (getHighlightPaint() != null) {
129            g2.setPaint(getHighlightPaint());
130            g2.fill(s3);
131        }
132
133        if (getFillPaint() != null) {
134            g2.setPaint(getFillPaint());
135            g2.fill(s1);
136            g2.fill(s2);
137        }
138
139
140        if (getOutlinePaint() != null) {
141            g2.setStroke(getOutlineStroke());
142            g2.setPaint(getOutlinePaint());
143            g2.draw(s1);
144            g2.draw(s2);
145            g2.draw(s3);
146        }
147    }
148
149    /**
150     * Tests another object for equality with this object.
151     *
152     * @param obj  the object to test (<code>null</code> permitted).
153     *
154     * @return A boolean.
155     */
156    public boolean equals(Object obj) {
157        if (obj == this) {
158            return true;
159        }
160        if (!(obj instanceof LongNeedle)) {
161            return false;
162        }
163        return super.equals(obj);
164    }
165
166    /**
167     * Returns a hash code for this instance.
168     *
169     * @return A hash code.
170     */
171    public int hashCode() {
172        return super.hashCode();
173    }
174
175    /**
176     * Returns a clone of this needle.
177     *
178     * @return A clone.
179     *
180     * @throws CloneNotSupportedException if the <code>LongNeedle</code>
181     *     cannot be cloned (in theory, this should not happen).
182     */
183    public Object clone() throws CloneNotSupportedException {
184        return super.clone();
185    }
186
187}