Source Code Cross Referenced for PolygonSymbolizer.java in  » GIS » GeoTools-2.4.1 » org » geotools » styling » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.styling 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *    GeoTools - OpenSource mapping toolkit
003:         *    http://geotools.org
004:         *    (C) 2002-2006, GeoTools Project Managment Committee (PMC)
005:         *    (C) 2002, Centre for Computational Geography
006:         *
007:         *    This library is free software; you can redistribute it and/or
008:         *    modify it under the terms of the GNU Lesser General Public
009:         *    License as published by the Free Software Foundation;
010:         *    version 2.1 of the License.
011:         *
012:         *    This library is distributed in the hope that it will be useful,
013:         *    but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
015:         *    Lesser General Public License for more details.
016:         *
017:         * Contacts:
018:         *     UNITED KINGDOM: James Macgill.  j.macgill@geog.leeds.ac.uk
019:         */
020:        package org.geotools.styling;
021:
022:        /**
023:         * A symbolizer describes how a polygon feature should appear on a map.
024:         *
025:         * <p>
026:         * The symbolizer describes not just the shape that should appear but also
027:         * such graphical properties as color and opacity.
028:         * </p>
029:         *
030:         * <p>
031:         * A symbolizer is obtained by specifying one of a small number of different
032:         * types of symbolizer and then supplying parameters to overide its default
033:         * behaviour.
034:         * </p>
035:         *
036:         * <p>
037:         * The details of this object are taken from the <a
038:         * href="https://portal.opengeospatial.org/files/?artifact_id=1188"> OGC
039:         * Styled-Layer Descriptor Report (OGC 02-070) version 1.0.0.</a>:
040:         * <pre><code>
041:         * &lt;xsd:element name="PolygonSymbolizer" substitutionGroup="sld:Symbolizer">
042:         *    &lt;xsd:annotation>
043:         *      &lt;xsd:documentation>
044:         *        A "PolygonSymbolizer" specifies the rendering of a polygon or
045:         *        area geometry, including its interior fill and border stroke.
046:         *      &lt;/xsd:documentation>
047:         *    &lt;/xsd:annotation>
048:         *    &lt;xsd:complexType>
049:         *      &lt;xsd:complexContent>
050:         *       &lt;xsd:extension base="sld:SymbolizerType">
051:         *         &lt;xsd:sequence>
052:         *           &lt;xsd:element ref="sld:Geometry" minOccurs="0"/>
053:         *           &lt;xsd:element ref="sld:Fill" minOccurs="0"/>
054:         *           &lt;xsd:element ref="sld:Stroke" minOccurs="0"/>
055:         *         &lt;/xsd:sequence>
056:         *       &lt;/xsd:extension>
057:         *     &lt;/xsd:complexContent>
058:         *   &lt;/xsd:complexType>
059:         * &lt;/xsd:element>
060:         * </code></pre>
061:         * </p>
062:         *
063:         * <p>
064:         * Renderers can use this information when displaying styled features, though
065:         * it must be remembered that not all renderers will be able to fully
066:         * represent strokes as set out by this interface.  For example, opacity may
067:         * not be supported.
068:         * </p>
069:         *
070:         * <p>
071:         * Notes:
072:         *
073:         * <ul>
074:         * <li>
075:         * The graphical parameters and their values are derived from SVG/CSS2
076:         * standards with names and semantics which are as close as possible.
077:         * </li>
078:         * </ul>
079:         * </p>
080:         *
081:         * @author James Macgill
082:         * @source $URL: http://svn.geotools.org/geotools/tags/2.4.1/modules/library/api/src/main/java/org/geotools/styling/PolygonSymbolizer.java $
083:         * @version $Id: PolygonSymbolizer.java 20562 2006-07-16 14:54:53Z jgarnett $
084:         */
085:        public interface PolygonSymbolizer extends Symbolizer {
086:            /**
087:             * Provides the graphical-symbolization parameter to use to fill the area
088:             * of the geometry. Note that the area should be filled first before the
089:             * outline  is rendered.
090:             *
091:             * @return The Fill style to use when rendering the area.
092:             */
093:            Fill getFill();
094:
095:            /**
096:             * Provides the graphical-symbolization parameter to use to fill the area
097:             * of the geometry. Note that the area should be filled first before the
098:             * outline  is rendered.
099:             *
100:             * @param fill The Fill style to use when rendering the area.
101:             */
102:            void setFill(Fill fill);
103:
104:            /**
105:             * Provides the graphical-symbolization parameter to use for the outline of
106:             * the Polygon.
107:             *
108:             * @return The Stroke style to use when rendering lines.
109:             */
110:            Stroke getStroke();
111:
112:            /**
113:             * Provides the graphical-symbolization parameter to use for the outline of
114:             * the Polygon.
115:             *
116:             * @param stroke The Stroke style to use when rendering lines.
117:             */
118:            void setStroke(Stroke stroke);
119:
120:            /**
121:             * This property defines the geometry to be used for styling.<br>
122:             * The property is optional and if it is absent (null) then the "default"
123:             * geometry property of the feature should be used.  Geometry types other
124:             * than inherently area types can be used.   If a line is used then the
125:             * line string is closed for filling (only) by connecting its end point to
126:             * its start point. The geometryPropertyName is the name of a geometry
127:             * property in the Feature being styled.  Typically, features only have
128:             * one geometry so, in general, the need to select one is not required.
129:             * Note: this moves a little away from the SLD spec which provides an
130:             * XPath reference to a Geometry object, but does follow it  in spirit.
131:             *
132:             * @return The name of the attribute in the feature being styled  that
133:             *         should be used.  If null then the default geometry should be
134:             *         used.
135:             */
136:            String getGeometryPropertyName();
137:
138:            /**
139:             * This property defines the geometry to be used for styling.<br>
140:             * The property is optional and if it is absent (null) then the "default"
141:             * geometry property of the feature should be used.  Geometry types other
142:             * than inherently area types can be used.   If a line is used then the
143:             * line string is closed for filling (only) by connecting its end point to
144:             * its start point. The geometryPropertyName is the name of a geometry
145:             * property in the Feature being styled.  Typically, features only have
146:             * one geometry so, in general, the need to select one is not required.
147:             * Note: this moves a little away from the SLD spec which provides an
148:             * XPath reference to a Geometry object, but does follow it  in spirit.
149:             *
150:             * @param geometryPropertyName The name of the attribute in the feature
151:             *        being styled  that should be used.  If null then the default
152:             *        geometry should be used.
153:             */
154:            void setGeometryPropertyName(String geometryPropertyName);
155:        }
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