Source Code Cross Referenced for Vertex.java in  » UML » jrefactory » org » acm » seguin » uml » line » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » UML » jrefactory » org.acm.seguin.uml.line 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* ====================================================================
002:         * The JRefactory License, Version 1.0
003:         *
004:         * Copyright (c) 2001 JRefactory.  All rights reserved.
005:         *
006:         * Redistribution and use in source and binary forms, with or without
007:         * modification, are permitted provided that the following conditions
008:         * are met:
009:         *
010:         * 1. Redistributions of source code must retain the above copyright
011:         *    notice, this list of conditions and the following disclaimer.
012:         *
013:         * 2. Redistributions in binary form must reproduce the above copyright
014:         *    notice, this list of conditions and the following disclaimer in
015:         *    the documentation and/or other materials provided with the
016:         *    distribution.
017:         *
018:         * 3. The end-user documentation included with the redistribution,
019:         *    if any, must include the following acknowledgment:
020:         *       "This product includes software developed by the
021:         *        JRefactory (http://www.sourceforge.org/projects/jrefactory)."
022:         *    Alternately, this acknowledgment may appear in the software itself,
023:         *    if and wherever such third-party acknowledgments normally appear.
024:         *
025:         * 4. The names "JRefactory" must not be used to endorse or promote
026:         *    products derived from this software without prior written
027:         *    permission. For written permission, please contact seguin@acm.org.
028:         *
029:         * 5. Products derived from this software may not be called "JRefactory",
030:         *    nor may "JRefactory" appear in their name, without prior written
031:         *    permission of Chris Seguin.
032:         *
033:         * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
034:         * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
035:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
036:         * DISCLAIMED.  IN NO EVENT SHALL THE CHRIS SEGUIN OR
037:         * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
038:         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
039:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
040:         * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
041:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
042:         * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
043:         * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
044:         * SUCH DAMAGE.
045:         * ====================================================================
046:         *
047:         * This software consists of voluntary contributions made by many
048:         * individuals on behalf of JRefactory.  For more information on
049:         * JRefactory, please see
050:         * <http://www.sourceforge.org/projects/jrefactory>.
051:         */
052:        package org.acm.seguin.uml.line;
053:
054:        import java.awt.Color;
055:        import java.awt.Point;
056:        import java.awt.Graphics;
057:        import java.io.PrintWriter;
058:
059:        /**
060:         *  Vertex
061:         *
062:         *@author     Chris Seguin
063:         *@author     Mike Atkinson
064:         *@created    July 28, 1999
065:         */
066:        public class Vertex {
067:            private Point point;
068:            private boolean selected;
069:            private boolean activated;
070:            private boolean rescaled;
071:            private double scale;
072:            private Point computed;
073:            private static double near = 3.0;
074:            private static int vertexSizeHalf = 2;
075:            private static int vertexSize = 5;
076:
077:            /**
078:             *  Constructor for the Vertex object
079:             *
080:             *@param  init  Description of Parameter
081:             */
082:            public Vertex(Point init) {
083:                point = init;
084:                computed = new Point();
085:                activated = false;
086:                selected = false;
087:                rescaled = true;
088:                scale = 1.0;
089:            }
090:
091:            /**
092:             *  Checks if the point is selected
093:             *
094:             *@return    true if the point is selected
095:             */
096:            public boolean isSelected() {
097:                return selected;
098:            }
099:
100:            /**
101:             *  Checks if this vertex is the active vertex
102:             *
103:             *@return    true if it is
104:             */
105:            public boolean isActive() {
106:                return activated;
107:            }
108:
109:            /**
110:             *  Paints the object
111:             *
112:             *@param  g  The graphics context
113:             */
114:            public void paint(Graphics g) {
115:                if (activated) {
116:                    g.setColor(Color.magenta);
117:                    g.fillOval((int) (getX() - Vertex.vertexSizeHalf),
118:                            (int) (getY() - Vertex.vertexSizeHalf),
119:                            Vertex.vertexSize, Vertex.vertexSize);
120:                } else if (selected) {
121:                    g.setColor(Color.black);
122:                    g.fillOval((int) (getX() - Vertex.vertexSizeHalf),
123:                            (int) (getY() - Vertex.vertexSizeHalf),
124:                            Vertex.vertexSize, Vertex.vertexSize);
125:                } else {
126:                    //  Don't paint it
127:                    //g.setColor(Color.black);
128:                    //g.drawOval((int) point.getX(), (int) point.getY(), 1, 1);
129:                }
130:            }
131:
132:            /**
133:             *  Determines if it is hit by a point
134:             *
135:             *@param  p  The point
136:             *@return    true if this point hits this vertex
137:             */
138:            public boolean hit(Point p) {
139:                double diffX = getX() - p.getX();
140:                double diffY = getY() - p.getY();
141:
142:                double dist = Math.sqrt(diffX * diffX + diffY * diffY);
143:
144:                return (dist < Vertex.near);
145:            }
146:
147:            /**
148:             *  Moves the vertex to p
149:             *
150:             *@param  p  the destination of the move
151:             */
152:            public void move(Point p) {
153:                point.x = (int) (p.x / scale);
154:                point.y = (int) (p.y / scale);
155:                rescaled = true;
156:            }
157:
158:            /**
159:             *  Save the vertex
160:             *
161:             *@param  output  the output stream
162:             */
163:            public void save(PrintWriter output) {
164:                output.print("(" + point.x + "," + point.y + ")");
165:            }
166:
167:            /**
168:             *  Shifts the point by a certain amount
169:             *
170:             *@param  x  the amount in the x coordinate
171:             *@param  y  the amount in the y coordinate
172:             */
173:            public void shift(int x, int y) {
174:                point.x += unscaleInteger(x);
175:                point.y += unscaleInteger(y);
176:                rescaled = true;
177:            }
178:
179:            /**
180:             *  Inverse of the scaleInteger operation
181:             *
182:             *@param  value  the input value
183:             *@return        the result of the unscape operation
184:             */
185:            private int unscaleInteger(int value) {
186:                return (int) (value / scale);
187:            }
188:
189:            /**
190:             *  Scales the vertex
191:             *
192:             *@param  value  the scaling factor
193:             */
194:            public void scale(double value) {
195:                if (Math.abs(value - scale) > 0.001) {
196:                    rescaled = true;
197:                    scale = value;
198:                }
199:            }
200:
201:            /**
202:             *  Gets the X attribute of the Vertex object
203:             *
204:             *@return    The X value
205:             */
206:            protected int getX() {
207:                if (rescaled) {
208:                    computed.x = (int) (point.x * scale);
209:                    computed.y = (int) (point.y * scale);
210:                    rescaled = false;
211:                }
212:                return computed.x;
213:            }
214:
215:            /**
216:             *  Gets the Y attribute of the Vertex object
217:             *
218:             *@return    The Y value
219:             */
220:            protected int getY() {
221:                if (rescaled) {
222:                    computed.x = (int) (point.x * scale);
223:                    computed.y = (int) (point.y * scale);
224:                    rescaled = false;
225:                }
226:                return computed.y;
227:            }
228:
229:            /**
230:             *  Gets the scaled point
231:             *
232:             *@return    the scaled point
233:             */
234:            protected Point getPoint() {
235:                if (rescaled) {
236:                    computed.x = (int) (point.x * scale);
237:                    computed.y = (int) (point.y * scale);
238:                    rescaled = false;
239:                }
240:                return computed;
241:            }
242:
243:            /**
244:             *  Selects the point
245:             *
246:             *@param  way  true if the point is selected
247:             */
248:            protected void select(boolean way) {
249:                selected = way;
250:                if (!selected) {
251:                    activated = false;
252:                }
253:            }
254:
255:            /**
256:             *  Sets whether this is the active vertex
257:             *
258:             *@param  way  true if this vertex is active
259:             */
260:            protected void active(boolean way) {
261:                activated = way;
262:                if (activated) {
263:                    selected = true;
264:                }
265:            }
266:
267:            /**
268:             *  Sets the Near attribute of the Vertex class
269:             *
270:             *@param  value  The new Near value
271:             */
272:            public static void setNear(double value) {
273:                near = value;
274:            }
275:
276:            /**
277:             *  Sets the VertexSize attribute of the Vertex class
278:             *
279:             *@param  value  The new VertexSize value
280:             */
281:            public static void setVertexSize(int value) {
282:                vertexSizeHalf = value / 2;
283:                vertexSize = value;
284:            }
285:        }
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