001 /* =========================================================== 002 * JFreeChart : a free chart library for the Java(tm) platform 003 * =========================================================== 004 * 005 * (C) Copyright 2000-2005, 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 * CompassFormat.java 029 * ------------------ 030 * (C) Copyright 2003, 2004, by Sylvain Vieujot and Contributors. 031 * 032 * Original Author: Sylvain Vieujot; 033 * Contributor(s): David Gilbert (for Object Refinery Limited); 034 * 035 * $Id: CompassFormat.java,v 1.3.2.1 2005/10/25 20:37:34 mungady Exp $ 036 * 037 * Changes 038 * ------- 039 * 18-Feb-2004 : Version 1 contributed by Sylvain Vieujot (DG); 040 * 041 */ 042 043 package org.jfree.chart.axis; 044 045 import java.text.FieldPosition; 046 import java.text.NumberFormat; 047 import java.text.ParsePosition; 048 049 /** 050 * A formatter that displays numbers as directions. 051 */ 052 public class CompassFormat extends NumberFormat { 053 054 /** North. */ 055 private static final String N = "N"; 056 057 /** East. */ 058 private static final String E = "E"; 059 060 /** South. */ 061 private static final String S = "S"; 062 063 /** West. */ 064 private static final String W = "W"; 065 066 /** The directions. */ 067 public static final String[] DIRECTIONS = { 068 N, N + N + E, N + E, E + N + E, E, E + S + E, S + E, S + S + E, S, 069 S + S + W, S + W, W + S + W, W, W + N + W, N + W, N + N + W, N 070 }; 071 072 /** 073 * Creates a new formatter. 074 */ 075 public CompassFormat() { 076 super(); 077 } 078 079 /** 080 * Returns a string representing the direction. 081 * 082 * @param direction the direction. 083 * 084 * @return A string. 085 */ 086 public String getDirectionCode(double direction) { 087 088 direction = direction % 360; 089 if (direction < 0.0) { 090 direction = direction + 360.0; 091 } 092 int index = ((int) Math.floor(direction / 11.25) + 1) / 2; 093 return DIRECTIONS[index]; 094 095 } 096 097 /* (non-Javadoc) 098 * @see java.text.NumberFormat#format(double, java.lang.StringBuffer, 099 * java.text.FieldPosition) 100 */ 101 public StringBuffer format(double number, StringBuffer toAppendTo, 102 FieldPosition pos) { 103 return toAppendTo.append(getDirectionCode(number)); 104 } 105 106 /* (non-Javadoc) 107 * @see java.text.NumberFormat#format(long, java.lang.StringBuffer, 108 * java.text.FieldPosition) 109 */ 110 public StringBuffer format(long number, StringBuffer toAppendTo, 111 FieldPosition pos) { 112 return toAppendTo.append(getDirectionCode(number)); 113 } 114 115 /** 116 * This method returns <code>null</code> for all inputs. This class cannot 117 * be used for parsing. 118 * 119 * @param source the source string. 120 * @param parsePosition the parse position. 121 * 122 * @return <code>null</code>. 123 */ 124 public Number parse(String source, ParsePosition parsePosition) { 125 return null; 126 } 127 128 }