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: * WindNeedle.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: WindNeedle.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: * 09-Sep-2003 : Added equals() method (DG);
042: *
043: */
044:
045: package org.jfree.chart.needle;
046:
047: import java.awt.Graphics2D;
048: import java.awt.geom.Point2D;
049: import java.awt.geom.Rectangle2D;
050: import java.io.Serializable;
051:
052: /**
053: * A needle that indicates wind direction, for use with the
054: * {@link org.jfree.chart.plot.CompassPlot} class.
055: */
056: public class WindNeedle extends ArrowNeedle implements Cloneable,
057: Serializable {
058:
059: /** For serialization. */
060: private static final long serialVersionUID = -2861061368907167834L;
061:
062: /**
063: * Default constructor.
064: */
065: public WindNeedle() {
066: super (false); // isArrowAtTop
067: }
068:
069: /**
070: * Draws the needle.
071: *
072: * @param g2 the graphics device.
073: * @param plotArea the plot area.
074: * @param rotate the rotation point.
075: * @param angle the angle.
076: */
077: protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea,
078: Point2D rotate, double angle) {
079:
080: super .drawNeedle(g2, plotArea, rotate, angle);
081: if ((rotate != null) && (plotArea != null)) {
082:
083: int spacing = getSize() * 3;
084: Rectangle2D newArea = new Rectangle2D.Double();
085:
086: Point2D newRotate = rotate;
087: newArea.setRect(plotArea.getMinX() - spacing, plotArea
088: .getMinY(), plotArea.getWidth(), plotArea
089: .getHeight());
090: super .drawNeedle(g2, newArea, newRotate, angle);
091:
092: newArea.setRect(plotArea.getMinX() + spacing, plotArea
093: .getMinY(), plotArea.getWidth(), plotArea
094: .getHeight());
095: super .drawNeedle(g2, newArea, newRotate, angle);
096:
097: }
098: }
099:
100: /**
101: * Tests another object for equality with this object.
102: *
103: * @param object the object to test.
104: *
105: * @return A boolean.
106: */
107: public boolean equals(Object object) {
108: if (object == null) {
109: return false;
110: }
111: if (object == this ) {
112: return true;
113: }
114: if (super .equals(object) && object instanceof WindNeedle) {
115: return true;
116: }
117: return false;
118: }
119:
120: }
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