001: /* ===========================================================
002: * JFreeChart : a free chart library for the Java(tm) platform
003: * ===========================================================
004: *
005: * (C) Copyright 2000-2006, 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: * ShipNeedle.java
029: * ---------------
030: * (C) Copyright 2002-2006, 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: * $Id: ShipNeedle.java,v 1.4.2.3 2006/08/02 10:40:57 mungady Exp $
037: *
038: * Changes:
039: * --------
040: * 25-Sep-2002 : Version 1, contributed by Bryan Scott (DG);
041: * 27-Mar-2003 : Implemented Serializable (DG);
042: * 09-Sep-2003 : Added equals() method (DG);
043: * 08-Jun-2005 : Implemented Cloneable (DG);
044: *
045: */
046:
047: package org.jfree.chart.needle;
048:
049: import java.awt.Graphics2D;
050: import java.awt.geom.Arc2D;
051: import java.awt.geom.GeneralPath;
052: import java.awt.geom.Point2D;
053: import java.awt.geom.Rectangle2D;
054: import java.io.Serializable;
055:
056: /**
057: * A needle in the shape of a ship, for use with the
058: * {@link org.jfree.chart.plot.CompassPlot} class.
059: */
060: public class ShipNeedle extends MeterNeedle implements Cloneable,
061: Serializable {
062:
063: /** For serialization. */
064: private static final long serialVersionUID = 149554868169435612L;
065:
066: /**
067: * Draws the needle.
068: *
069: * @param g2 the graphics device.
070: * @param plotArea the plot area.
071: * @param rotate the rotation point.
072: * @param angle the angle.
073: */
074: protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea,
075: Point2D rotate, double angle) {
076:
077: GeneralPath shape = new GeneralPath();
078: shape.append(new Arc2D.Double(-9.0, -7.0, 10, 14, 0.0, 25.5,
079: Arc2D.OPEN), true);
080: shape.append(new Arc2D.Double(0.0, -7.0, 10, 14, 154.5, 25.5,
081: Arc2D.OPEN), true);
082: shape.closePath();
083: getTransform().setToTranslation(plotArea.getMinX(),
084: plotArea.getMaxY());
085: getTransform().scale(plotArea.getWidth(),
086: plotArea.getHeight() / 3);
087: shape.transform(getTransform());
088:
089: if ((rotate != null) && (angle != 0)) {
090: /// we have rotation
091: getTransform().setToRotation(angle, rotate.getX(),
092: rotate.getY());
093: shape.transform(getTransform());
094: }
095:
096: defaultDisplay(g2, shape);
097: }
098:
099: /**
100: * Tests another object for equality with this object.
101: *
102: * @param object the object to test.
103: *
104: * @return A boolean.
105: */
106: public boolean equals(Object object) {
107: if (object == null) {
108: return false;
109: }
110: if (object == this ) {
111: return true;
112: }
113: if (super .equals(object) && object instanceof ShipNeedle) {
114: return true;
115: }
116: return false;
117: }
118:
119: /**
120: * Returns a clone of this needle.
121: *
122: * @return A clone.
123: *
124: * @throws CloneNotSupportedException if the <code>ShipNeedle</code>
125: * cannot be cloned (in theory, this should not happen).
126: */
127: public Object clone() throws CloneNotSupportedException {
128: return super.clone();
129: }
130:
131: }
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