001 /* Copyright (C) 1999, 2000, 2002 Free Software Foundation 002 003 This file is part of GNU Classpath. 004 005 GNU Classpath is free software; you can redistribute it and/or modify 006 it under the terms of the GNU General Public License as published by 007 the Free Software Foundation; either version 2, or (at your option) 008 any later version. 009 010 GNU Classpath is distributed in the hope that it will be useful, but 011 WITHOUT ANY WARRANTY; without even the implied warranty of 012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 General Public License for more details. 014 015 You should have received a copy of the GNU General Public License 016 along with GNU Classpath; see the file COPYING. If not, write to the 017 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 018 02110-1301 USA. 019 020 Linking this library statically or dynamically with other modules is 021 making a combined work based on this library. Thus, the terms and 022 conditions of the GNU General Public License cover the whole 023 combination. 024 025 As a special exception, the copyright holders of this library give you 026 permission to link this library with independent modules to produce an 027 executable, regardless of the license terms of these independent 028 modules, and to copy and distribute the resulting executable under 029 terms of your choice, provided that you also meet, for each linked 030 independent module, the terms and conditions of the license of that 031 module. An independent module is a module which is not derived from 032 or based on this library. If you modify this library, you may extend 033 this exception to your version of the library, but you are not 034 obligated to do so. If you do not wish to do so, delete this 035 exception statement from your version. */ 036 037 038 package java.awt; 039 040 /** 041 * This class represents various predefined cursor types. 042 * 043 * @author Aaron M. Renn (arenn@urbanophile.com) 044 */ 045 public class Cursor implements java.io.Serializable 046 { 047 static final long serialVersionUID = 8028237497568985504L; 048 049 /** 050 * Constant for the system default cursor type 051 */ 052 public static final int DEFAULT_CURSOR = 0; 053 054 /** 055 * Constant for a cross-hair cursor. 056 */ 057 public static final int CROSSHAIR_CURSOR = 1; 058 059 /** 060 * Constant for a cursor over a text field. 061 */ 062 public static final int TEXT_CURSOR = 2; 063 064 /** 065 * Constant for a cursor to display while waiting for an action to complete. 066 */ 067 public static final int WAIT_CURSOR = 3; 068 069 /** 070 * Cursor used over SW corner of window decorations. 071 */ 072 public static final int SW_RESIZE_CURSOR = 4; 073 074 /** 075 * Cursor used over SE corner of window decorations. 076 */ 077 public static final int SE_RESIZE_CURSOR = 5; 078 079 /** 080 * Cursor used over NW corner of window decorations. 081 */ 082 public static final int NW_RESIZE_CURSOR = 6; 083 084 /** 085 * Cursor used over NE corner of window decorations. 086 */ 087 public static final int NE_RESIZE_CURSOR = 7; 088 089 /** 090 * Cursor used over N edge of window decorations. 091 */ 092 public static final int N_RESIZE_CURSOR = 8; 093 094 /** 095 * Cursor used over S edge of window decorations. 096 */ 097 public static final int S_RESIZE_CURSOR = 9; 098 099 /** 100 * Cursor used over W edge of window decorations. 101 */ 102 public static final int W_RESIZE_CURSOR = 10; 103 104 /** 105 * Cursor used over E edge of window decorations. 106 */ 107 public static final int E_RESIZE_CURSOR = 11; 108 109 /** 110 * Constant for a hand cursor. 111 */ 112 public static final int HAND_CURSOR = 12; 113 114 /** 115 * Constant for a cursor used during window move operations. 116 */ 117 public static final int MOVE_CURSOR = 13; 118 119 private static String[] NAMES = { "Default Cursor", "Crosshair Cursor", 120 "Text Cursor", "Wait Cursor", 121 "Southwest Resize Cursor", 122 "Southeast Resize Cursor", 123 "Northwest Resize Cursor", 124 "Northeast Resize Cursor", 125 "North Resize Cursor", "South Resize Cursor", 126 "West Resize Cursor", "East Resize Cursor", 127 "Hand Cursor", "Move Cursor" }; 128 129 public static final int CUSTOM_CURSOR = 0xFFFFFFFF; 130 131 private static final int PREDEFINED_COUNT = 14; 132 133 protected static Cursor[] predefined = new Cursor[PREDEFINED_COUNT]; 134 protected String name; 135 136 /** 137 * @serial The numeric id of this cursor. 138 */ 139 int type; 140 141 /** 142 * Initializes a new instance of <code>Cursor</code> with the specified 143 * type. 144 * 145 * @param type The cursor type. 146 * 147 * @exception IllegalArgumentException If the specified cursor type is invalid 148 */ 149 public Cursor(int type) 150 { 151 if (type < 0 || type >= PREDEFINED_COUNT) 152 throw new IllegalArgumentException ("invalid cursor " + type); 153 154 this.type = type; 155 156 name = NAMES[type]; 157 158 // FIXME: lookup? 159 } 160 161 /** This constructor is used internally only. 162 * Application code should call Toolkit.createCustomCursor(). 163 */ 164 protected Cursor(String name) 165 { 166 this.name = name; 167 this.type = CUSTOM_CURSOR; 168 } 169 170 /** 171 * Returns an instance of <code>Cursor</code> for one of the specified 172 * predetermined types. 173 * 174 * @param type The type contant from this class. 175 * 176 * @return The requested predefined cursor. 177 * 178 * @exception IllegalArgumentException If the constant is not one of the 179 * predefined cursor type constants from this class. 180 */ 181 public static Cursor getPredefinedCursor(int type) 182 { 183 if (type < 0 || type >= PREDEFINED_COUNT) 184 throw new IllegalArgumentException ("invalid cursor " + type); 185 if (predefined[type] == null) 186 predefined[type] = new Cursor(type); 187 return predefined[type]; 188 } 189 190 /** 191 * Retrieves the system specific custom Cursor named Cursor names are, 192 * for example: "Invalid.16x16". 193 * 194 * @exception AWTException 195 * @exception HeadlessException If GraphicsEnvironment.isHeadless() 196 * returns true. 197 */ 198 public static Cursor getSystemCustomCursor(String name) 199 throws AWTException 200 { 201 if (GraphicsEnvironment.isHeadless()) 202 throw new HeadlessException (); 203 204 // FIXME 205 return null; 206 } 207 208 /** 209 * Returns an instance of the system default cursor type. 210 * 211 * @return The system default cursor. 212 */ 213 public static Cursor getDefaultCursor() 214 { 215 return getPredefinedCursor(DEFAULT_CURSOR); 216 } 217 218 /** 219 * Returns the numeric type identifier for this cursor. 220 * 221 * @return The cursor id. 222 */ 223 public int getType() 224 { 225 return type; 226 } 227 228 public String getName() 229 { 230 return name; 231 } 232 233 public String toString() 234 { 235 return (this.getClass() 236 + "[type=" + getType() 237 + ",name=" + getName() + "]"); 238 } 239 }