001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/graphics/sld/PointSymbolizer.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 Department of Geography, University of Bonn
006 and
007 lat/lon GmbH
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036 package org.deegree.graphics.sld;
037
038 import org.deegree.framework.xml.Marshallable;
039
040 /**
041 * Used to render a "graphic" at a point. If a line-string or polygon geometry is used with this
042 * symbol, then the semantic is to use the centroid of the geometry, or any similar representative
043 * point. The meaning of the contained elements are discussed with the element definitions below. If
044 * the Geometry element is omitted, then the "default" geometry for the feature type is used. (Many
045 * feature types will have only one geometry attribute.) If the Graphic element is omitted, then
046 * nothing will be plotted.
047 * <p>
048 * ----------------------------------------------------------------------
049 * </p>
050 *
051 * @author <a href="mailto:k.lupp@web.de">Katharina Lupp</a>
052 * @version $Revision: 18195 $ $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
053 */
054
055 public class PointSymbolizer extends AbstractSymbolizer implements Marshallable {
056
057 private Graphic graphic = null;
058
059 /**
060 * Creates a new PointSymbolizer object.
061 */
062 public PointSymbolizer() {
063 super( null, "org.deegree.graphics.displayelements.PointDisplayElement" );
064 Stroke stroke = new Stroke();
065 Fill fill = new Fill();
066 Mark mark = new Mark( "square", stroke, fill );
067 graphic = StyleFactory.createGraphic( null, mark, 1, 5, 0 );
068 }
069
070 /**
071 * constructor initializing the class with the <PointSymbolizer>
072 * @param graphic
073 * @param geometry
074 * @param min
075 * @param max
076 */
077 PointSymbolizer( Graphic graphic, Geometry geometry, double min, double max ) {
078 super( geometry, "org.deegree.graphics.displayelements.PointDisplayElement" );
079
080 if ( graphic == null ) {
081 graphic = new Graphic();
082 }
083
084 setGraphic( graphic );
085 setMinScaleDenominator( min );
086 setMaxScaleDenominator( max );
087 }
088
089 /**
090 * constructor initializing the class with the <PointSymbolizer>
091 * @param graphic
092 * @param geometry
093 * @param responsibleClass
094 * @param min
095 * @param max
096 */
097 PointSymbolizer( Graphic graphic, Geometry geometry, String responsibleClass, double min, double max ) {
098 super( geometry, responsibleClass );
099
100 if ( graphic == null ) {
101 graphic = new Graphic();
102 }
103
104 setGraphic( graphic );
105 setMinScaleDenominator( min );
106 setMaxScaleDenominator( max );
107 }
108
109 /**
110 * A Graphic is a "graphic symbol" with an inherent shape, color, and size. Graphics can either
111 * be referenced from an external URL in a common format (such as GIF or SVG) or may be derived
112 * from a Mark. Multiple external URLs may be referenced with the semantic that they all provide
113 * the same graphic in different formats. The "hot spot" to use for rendering at a point or the
114 * start and finish handle points to use for rendering a graphic along a line must either be
115 * inherent in the external format or are system- dependent. The default size of an image format
116 * (such as GIF) is the inherent size of the image. The default size of a format without an
117 * inherent size is 16 pixels in height and the corresponding aspect in width. If a size is
118 * specified, the height of the graphic will be scaled to that size and the corresponding aspect
119 * will be used for the width. The default if neither an ExternalURL nor a Mark is specified is
120 * to use the default Mark with a size of 6 pixels. The size is in pixels and the rotation is in
121 * degrees clockwise, with 0 (default) meaning no rotation. In the case that a Graphic is
122 * derived from a font-glyph Mark, the Size specified here will be used for the final rendering.
123 * Allowed CssParameters are "opacity", "size", and "rotation".
124 *
125 * @return the graphic of the point
126 *
127 */
128 public Graphic getGraphic() {
129 return graphic;
130 }
131
132 /**
133 * sets the <Graphic>
134 *
135 * @param graphic
136 * the graphic of the point
137 *
138 */
139 public void setGraphic( Graphic graphic ) {
140 this.graphic = graphic;
141 }
142
143 /**
144 * exports the content of the PointSymbolizer as XML formated String
145 *
146 * @return xml representation of the PointSymbolizer
147 */
148 public String exportAsXML() {
149
150 StringBuffer sb = new StringBuffer( 1000 );
151 sb.append( "<PointSymbolizer>" );
152 if ( geometry != null ) {
153 sb.append( ( (Marshallable) geometry ).exportAsXML() );
154 }
155 if ( graphic != null ) {
156 sb.append( ( (Marshallable) graphic ).exportAsXML() );
157 }
158 sb.append( "</PointSymbolizer>" );
159
160 return sb.toString();
161 }
162 }