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: * LongNeedle.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: LongNeedle.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: * 16-Mar-2004 : Implemented Rotation
044: */
045:
046: package org.jfree.chart.needle;
047:
048: import java.awt.Graphics2D;
049: import java.awt.geom.GeneralPath;
050: import java.awt.geom.Point2D;
051: import java.awt.geom.Rectangle2D;
052: import java.awt.Shape;
053: import java.io.Serializable;
054:
055: /**
056: * A needle that is represented by a long line.
057: */
058: public class LongNeedle extends MeterNeedle implements Cloneable,
059: 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(),
122: rotate.getY());
123: s1 = shape1.createTransformedShape(transform);
124: s2 = shape2.createTransformedShape(transform);
125: s3 = shape3.createTransformedShape(transform);
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: if (getOutlinePaint() != null) {
140: g2.setStroke(getOutlineStroke());
141: g2.setPaint(getOutlinePaint());
142: g2.draw(s1);
143: g2.draw(s2);
144: g2.draw(s3);
145: }
146: }
147:
148: /**
149: * Tests another object for equality with this object.
150: *
151: * @param obj the object to test (<code>null</code> permitted).
152: *
153: * @return A boolean.
154: */
155: public boolean equals(Object obj) {
156: if (obj == this ) {
157: return true;
158: }
159: if (!(obj instanceof LongNeedle)) {
160: return false;
161: }
162: if (!super .equals(obj)) {
163: return false;
164: }
165: return true;
166: }
167:
168: /**
169: * Returns a clone of this needle.
170: *
171: * @return A clone.
172: *
173: * @throws CloneNotSupportedException if the <code>LongNeedle</code>
174: * cannot be cloned (in theory, this should not happen).
175: */
176: public Object clone() throws CloneNotSupportedException {
177: return super.clone();
178: }
179:
180: }
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