Source Code Cross Referenced for PdfLayerMembership.java in  » PDF » pdf-itext » com » lowagie » text » pdf » 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 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2004 by Paulo Soares.
003:         *
004:         * The contents of this file are subject to the Mozilla Public License Version 1.1
005:         * (the "License"); you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at http://www.mozilla.org/MPL/
007:         *
008:         * Software distributed under the License is distributed on an "AS IS" basis,
009:         * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
010:         * for the specific language governing rights and limitations under the License.
011:         *
012:         * The Original Code is 'iText, a free JAVA-PDF library'.
013:         *
014:         * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
015:         * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
016:         * All Rights Reserved.
017:         * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
018:         * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
019:         *
020:         * Contributor(s): all the names of the contributors are added in the source code
021:         * where applicable.
022:         *
023:         * Alternatively, the contents of this file may be used under the terms of the
024:         * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
025:         * provisions of LGPL are applicable instead of those above.  If you wish to
026:         * allow use of your version of this file only under the terms of the LGPL
027:         * License and not to allow others to use your version of this file under
028:         * the MPL, indicate your decision by deleting the provisions above and
029:         * replace them with the notice and other provisions required by the LGPL.
030:         * If you do not delete the provisions above, a recipient may use your version
031:         * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
032:         *
033:         * This library is free software; you can redistribute it and/or modify it
034:         * under the terms of the MPL as stated above or under the terms of the GNU
035:         * Library General Public License as published by the Free Software Foundation;
036:         * either version 2 of the License, or any later version.
037:         *
038:         * This library is distributed in the hope that it will be useful, but WITHOUT
039:         * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
040:         * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
041:         * details.
042:         *
043:         * If you didn't download this code from the following link, you should check if
044:         * you aren't using an obsolete version:
045:         * http://www.lowagie.com/iText/
046:         */
047:
048:        package com.lowagie.text.pdf;
049:
050:        import java.util.Collection;
051:        import java.util.HashSet;
052:
053:        /**
054:         * Content typically belongs to a single optional content group,
055:         * and is visible when the group is <B>ON</B> and invisible when it is <B>OFF</B>. To express more
056:         * complex visibility policies, content should not declare itself to belong to an optional
057:         * content group directly, but rather to an optional content membership dictionary
058:         * represented by this class.
059:         *
060:         * @author Paulo Soares (psoares@consiste.pt)
061:         */
062:        public class PdfLayerMembership extends PdfDictionary implements  PdfOCG {
063:
064:            /**
065:             * Visible only if all of the entries are <B>ON</B>.
066:             */
067:            public static final PdfName ALLON = new PdfName("AllOn");
068:            /**
069:             * Visible if any of the entries are <B>ON</B>.
070:             */
071:            public static final PdfName ANYON = new PdfName("AnyOn");
072:            /**
073:             * Visible if any of the entries are <B>OFF</B>.
074:             */
075:            public static final PdfName ANYOFF = new PdfName("AnyOff");
076:            /**
077:             * Visible only if all of the entries are <B>OFF</B>.
078:             */
079:            public static final PdfName ALLOFF = new PdfName("AllOff");
080:
081:            PdfIndirectReference ref;
082:            PdfArray members = new PdfArray();
083:            HashSet layers = new HashSet();
084:
085:            /**
086:             * Creates a new, empty, membership layer.
087:             * @param writer the writer
088:             */
089:            public PdfLayerMembership(PdfWriter writer) {
090:                super (PdfName.OCMD);
091:                put(PdfName.OCGS, members);
092:                ref = writer.getPdfIndirectReference();
093:            }
094:
095:            /**
096:             * Gets the <CODE>PdfIndirectReference</CODE> that represents this membership layer.
097:             * @return the <CODE>PdfIndirectReference</CODE> that represents this layer
098:             */
099:            public PdfIndirectReference getRef() {
100:                return ref;
101:            }
102:
103:            /**
104:             * Adds a new member to the layer.
105:             * @param layer the new member to the layer
106:             */
107:            public void addMember(PdfLayer layer) {
108:                if (!layers.contains(layer)) {
109:                    members.add(layer.getRef());
110:                    layers.add(layer);
111:                }
112:            }
113:
114:            /**
115:             * Gets the member layers.
116:             * @return the member layers
117:             */
118:            public Collection getLayers() {
119:                return layers;
120:            }
121:
122:            /**
123:             * Sets the visibility policy for content belonging to this
124:             * membership dictionary. Possible values are ALLON, ANYON, ANYOFF and ALLOFF.
125:             * The default value is ANYON.
126:             * @param type the visibility policy
127:             */
128:            public void setVisibilityPolicy(PdfName type) {
129:                put(PdfName.P, type);
130:            }
131:
132:            /**
133:             * Gets the dictionary representing the membership layer. It just returns <CODE>this</CODE>.
134:             * @return the dictionary representing the layer
135:             */
136:            public PdfObject getPdfObject() {
137:                return this;
138:            }
139:        }
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