Source Code Cross Referenced for Direction.java in  » Swing-Library » InfoNode-Look-Feel » net » infonode » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Swing Library » InfoNode Look Feel » net.infonode.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (C) 2004 NNL Technology AB
003:         * Visit www.infonode.net for information about InfoNode(R) 
004:         * products and how to contact NNL Technology AB.
005:         *
006:         * This program is free software; you can redistribute it and/or
007:         * modify it under the terms of the GNU General Public License
008:         * as published by the Free Software Foundation; either version 2
009:         * of the License, or (at your option) any later version.
010:         *
011:         * This program is distributed in the hope that it will be useful,
012:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014:         * GNU General Public License for more details.
015:         *
016:         * You should have received a copy of the GNU General Public License
017:         * along with this program; if not, write to the Free Software
018:         * Foundation, Inc., 59 Temple Place - Suite 330, Boston, 
019:         * MA 02111-1307, USA.
020:         */
021:
022:        // $Id: Direction.java,v 1.6 2004/09/28 15:07:29 jesper Exp $
023:        package net.infonode.util;
024:
025:        import java.io.IOException;
026:        import java.io.ObjectInputStream;
027:
028:        /**
029:         * An enum class for directions, up, down, left, right.
030:         *
031:         * @author $Author: jesper $
032:         * @version $Revision: 1.6 $
033:         */
034:        final public class Direction extends Enum {
035:            private static final long serialVersionUID = 1;
036:
037:            /**
038:             * Up direction.
039:             */
040:            public static final Direction UP = new Direction(0, "Up", false);
041:
042:            /**
043:             * Right direction.
044:             */
045:            public static final Direction RIGHT = new Direction(1, "Right",
046:                    true);
047:
048:            /**
049:             * Down direction.
050:             */
051:            public static final Direction DOWN = new Direction(2, "Down", false);
052:
053:            /**
054:             * Left direction.
055:             */
056:            public static final Direction LEFT = new Direction(3, "Left", true);
057:
058:            /**
059:             * Array containing all directions.
060:             */
061:            public static final Direction[] DIRECTIONS = { UP, RIGHT, DOWN,
062:                    LEFT };
063:
064:            static {
065:                UP.rotateCW = RIGHT;
066:                RIGHT.rotateCW = DOWN;
067:                DOWN.rotateCW = LEFT;
068:                LEFT.rotateCW = UP;
069:            }
070:
071:            private transient Direction rotateCW;
072:            private transient boolean isHorizontal;
073:
074:            private Direction(int value, String name, boolean isHorizontal) {
075:                super (value, name);
076:                this .isHorizontal = isHorizontal;
077:            }
078:
079:            /**
080:             * Returns the direction that is one quarter of a revolution clock wise.
081:             *
082:             * @return the direction that is one quarter of a revolution clock wise
083:             */
084:            public Direction getNextCW() {
085:                return rotateCW;
086:            }
087:
088:            /**
089:             * Returns the direction that is one quarter of a revolution counter clock wise.
090:             *
091:             * @return the direction that is one quarter of a revolution counter clock wise
092:             */
093:            public Direction getNextCCW() {
094:                return rotateCW.rotateCW.rotateCW;
095:            }
096:
097:            /**
098:             * Returns true if the direction is horizontal.
099:             *
100:             * @return true if the direction is horizontal
101:             */
102:            public boolean isHorizontal() {
103:                return isHorizontal;
104:            }
105:
106:            /**
107:             * Returns the opposite direction.
108:             *
109:             * @return the opposite direction
110:             */
111:            public Direction getOpposite() {
112:                return getNextCW().getNextCW();
113:            }
114:
115:            /**
116:             * Gets all directions.
117:             *
118:             * @return all directions
119:             * @since 1.1.0
120:             */
121:            public static Direction[] getDirections() {
122:                return (Direction[]) DIRECTIONS.clone();
123:            }
124:
125:            /**
126:             * Decodes a direction from a stream.
127:             *
128:             * @param in the stream containing the direction
129:             * @return the direction
130:             * @throws IOException if there is a stream error
131:             */
132:            public static Direction decode(ObjectInputStream in)
133:                    throws IOException {
134:                return (Direction) decode(Direction.class, in);
135:            }
136:
137:        }
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