Source Code Cross Referenced for PolylineShape.java in  » PDF » pdf-itext » com » lowagie » text » pdf » internal » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » PDF » pdf itext » com.lowagie.text.pdf.internal 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $Id: PolylineShape.java 2772 2007-05-21 14:06:08Z blowagie $
003:         *
004:         * Copyright 2007 Bruno Lowagie and Wil
005:         *
006:         * The contents of this file are subject to the Mozilla Public License Version 1.1
007:         * (the "License"); you may not use this file except in compliance with the License.
008:         * You may obtain a copy of the License at http://www.mozilla.org/MPL/
009:         *
010:         * Software distributed under the License is distributed on an "AS IS" basis,
011:         * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
012:         * for the specific language governing rights and limitations under the License.
013:         *
014:         * The Original Code is 'iText, a free JAVA-PDF library'.
015:         *
016:         * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
017:         * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
018:         * All Rights Reserved.
019:         * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
020:         * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
021:         *
022:         * Contributor(s): all the names of the contributors are added in the source code
023:         * where applicable.
024:         *
025:         * Alternatively, the contents of this file may be used under the terms of the
026:         * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
027:         * provisions of LGPL are applicable instead of those above.  If you wish to
028:         * allow use of your version of this file only under the terms of the LGPL
029:         * License and not to allow others to use your version of this file under
030:         * the MPL, indicate your decision by deleting the provisions above and
031:         * replace them with the notice and other provisions required by the LGPL.
032:         * If you do not delete the provisions above, a recipient may use your version
033:         * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
034:         *
035:         * This library is free software; you can redistribute it and/or modify it
036:         * under the terms of the MPL as stated above or under the terms of the GNU
037:         * Library General Public License as published by the Free Software Foundation;
038:         * either version 2 of the License, or any later version.
039:         *
040:         * This library is distributed in the hope that it will be useful, but WITHOUT
041:         * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
042:         * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
043:         * details.
044:         *
045:         * If you didn't download this code from the following link, you should check if
046:         * you aren't using an obsolete version:
047:         * http://www.lowagie.com/iText/
048:         */
049:
050:        package com.lowagie.text.pdf.internal;
051:
052:        import java.awt.Shape;
053:        import java.awt.Rectangle;
054:        import java.awt.geom.AffineTransform;
055:        import java.awt.geom.PathIterator;
056:        import java.awt.geom.Line2D;
057:        import java.awt.geom.Point2D;
058:        import java.awt.geom.Rectangle2D;
059:
060:        /**
061:         * Class that defines a Polyline shape.
062:         * This class was originally written by wil - amristar.com.au
063:         * and integrated into iText by Bruno.
064:         */
065:        public class PolylineShape implements  Shape {
066:            /** All the X-values of the coordinates in the polyline. */
067:            protected int[] x;
068:            /** All the Y-values of the coordinates in the polyline. */
069:            protected int[] y;
070:            /** The total number of points. */
071:            protected int np;
072:
073:            /** Creates a PolylineShape. */
074:            public PolylineShape(int[] x, int[] y, int nPoints) {
075:                // Should copy array (as done in Polygon)
076:                this .np = nPoints;
077:                // Take a copy.
078:                this .x = new int[np];
079:                this .y = new int[np];
080:                System.arraycopy(x, 0, this .x, 0, np);
081:                System.arraycopy(y, 0, this .y, 0, np);
082:            }
083:
084:            /**
085:             * Returns the bounding box of this polyline.
086:             *
087:             * @return a {@link Rectangle2D} that is the high-precision
088:             * 	bounding box of this line.
089:             * @see java.awt.Shape#getBounds2D()
090:             */
091:            public Rectangle2D getBounds2D() {
092:                int[] r = rect();
093:                return r == null ? null : new Rectangle2D.Double(r[0], r[1],
094:                        r[2], r[3]);
095:            }
096:
097:            /**
098:             * Returns the bounding box of this polyline.
099:             * @see java.awt.Shape#getBounds()
100:             */
101:            public Rectangle getBounds() {
102:                return getBounds2D().getBounds();
103:            }
104:
105:            /**
106:             * Calculates the origin (X, Y) and the width and height
107:             * of a rectangle that contains all the segments of the
108:             * polyline.
109:             */
110:            private int[] rect() {
111:                if (np == 0)
112:                    return null;
113:                int xMin = x[0], yMin = y[0], xMax = x[0], yMax = y[0];
114:
115:                for (int i = 1; i < np; i++) {
116:                    if (x[i] < xMin)
117:                        xMin = x[i];
118:                    else if (x[i] > xMax)
119:                        xMax = x[i];
120:                    if (y[i] < yMin)
121:                        yMin = y[i];
122:                    else if (y[i] > yMax)
123:                        yMax = y[i];
124:                }
125:
126:                return new int[] { xMin, yMin, xMax - xMin, yMax - yMin };
127:            }
128:
129:            /**
130:             * A polyline can't contain a point.
131:             * @see java.awt.Shape#contains(double, double)
132:             */
133:            public boolean contains(double x, double y) {
134:                return false;
135:            }
136:
137:            /**
138:             * A polyline can't contain a point.
139:             * @see java.awt.Shape#contains(java.awt.geom.Point2D)
140:             */
141:            public boolean contains(Point2D p) {
142:                return false;
143:            }
144:
145:            /**
146:             * A polyline can't contain a point.
147:             * @see java.awt.Shape#contains(double, double, double, double)
148:             */
149:            public boolean contains(double x, double y, double w, double h) {
150:                return false;
151:            }
152:
153:            /**
154:             * A polyline can't contain a point.
155:             * @see java.awt.Shape#contains(java.awt.geom.Rectangle2D)
156:             */
157:            public boolean contains(Rectangle2D r) {
158:                return false;
159:            }
160:
161:            /**
162:             * Checks if one of the lines in the polyline intersects
163:             * with a given rectangle.
164:             * @see java.awt.Shape#intersects(double, double, double, double)
165:             */
166:            public boolean intersects(double x, double y, double w, double h) {
167:                return intersects(new Rectangle2D.Double(x, y, w, h));
168:            }
169:
170:            /**
171:             * Checks if one of the lines in the polyline intersects
172:             * with a given rectangle.
173:             * @see java.awt.Shape#intersects(java.awt.geom.Rectangle2D)
174:             */
175:            public boolean intersects(Rectangle2D r) {
176:                if (np == 0)
177:                    return false;
178:                Line2D line = new Line2D.Double(x[0], y[0], x[0], y[0]);
179:                for (int i = 1; i < np; i++) {
180:                    line.setLine(x[i - 1], y[i - 1], x[i], y[i]);
181:                    if (line.intersects(r))
182:                        return true;
183:                }
184:                return false;
185:            }
186:
187:            /**
188:             * Returns an iteration object that defines the boundary of the polyline.
189:             * @param at the specified {@link AffineTransform}
190:             * @return a {@link PathIterator} that defines the boundary of this polyline.
191:             * @see java.awt.Shape#intersects(java.awt.geom.Rectangle2D)
192:             */
193:            public PathIterator getPathIterator(AffineTransform at) {
194:                return new PolylineShapeIterator(this , at);
195:            }
196:
197:            /**
198:             * There's no difference with getPathIterator(AffineTransform at);
199:             * we just need this method to implement the Shape interface.
200:             */
201:            public PathIterator getPathIterator(AffineTransform at,
202:                    double flatness) {
203:                return new PolylineShapeIterator(this, at);
204:            }
205:
206:        }
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