001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/portal/standard/wms/control/layertree/LayerTreeListener.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.portal.standard.wms.control.layertree;
037
038 import java.io.IOException;
039 import java.net.URL;
040 import java.nio.charset.Charset;
041 import java.util.List;
042
043 import org.deegree.enterprise.control.ajax.AbstractListener;
044 import org.deegree.enterprise.control.ajax.ResponseHandler;
045 import org.deegree.enterprise.control.ajax.WebEvent;
046 import org.deegree.framework.util.MapUtils;
047 import org.deegree.model.spatialschema.Envelope;
048 import org.deegree.model.spatialschema.GeometryFactory;
049 import org.deegree.model.spatialschema.Point;
050 import org.deegree.portal.Constants;
051 import org.deegree.portal.context.LayerGroup;
052 import org.deegree.portal.context.MMLayer;
053 import org.deegree.portal.context.MapModel;
054 import org.deegree.portal.context.MapModelEntry;
055 import org.deegree.portal.context.ViewContext;
056
057 /**
058 * TODO add class documentation here
059 *
060 * @author <a href="mailto:name@deegree.org">Andreas Poth</a>
061 * @author last edited by: $Author: apoth $
062 *
063 * @version $Revision: 25492 $, $Date: 2010-07-26 13:07:01 +0200 (Mo, 26. Jul 2010) $
064 */
065 public class LayerTreeListener extends AbstractListener {
066
067 private double scale = 0;
068
069 public void actionPerformed( WebEvent event, ResponseHandler responseHandler )
070 throws IOException {
071 ViewContext vc = (ViewContext) event.getSession().getAttribute( Constants.CURRENTMAPCONTEXT );
072 Point[] points = vc.getGeneral().getBoundingBox();
073 Envelope bbox = GeometryFactory.createEnvelope( points[0].getPosition(), points[1].getPosition(),
074 points[0].getCoordinateSystem() );
075 scale = MapUtils.calcScaleWMS111( vc.getGeneral().getWindow().width, vc.getGeneral().getWindow().height, bbox,
076 bbox.getCoordinateSystem() );
077
078 StringBuilder sb = new StringBuilder( 10000 );
079 sb.append( '[' );
080 // return all nodes for root
081 MapModel mapModel = vc.getGeneral().getExtension().getMapModel();
082 List<LayerGroup> layerGroups = mapModel.getLayerGroups();
083 for ( LayerGroup lg : layerGroups ) {
084 sb.append( "{'text' : " );
085 sb.append( "'" ).append( lg.getTitle() ).append( "'," );
086 sb.append( "'id' : '" ).append( lg.getIdentifier() ).append( "'," );
087 sb.append( "'checked': true," );
088 sb.append( "'expanded': " ).append( lg.isExpanded() ).append( "," );
089 sb.append( "'leaf' : false, 'cls' : 'folder' " );
090 appendChildren( sb, lg );
091 sb.append( "}" );
092
093 }
094 sb.append( ']' );
095 String charEnc = Charset.defaultCharset().displayName();
096 responseHandler.setContentType( "application/json; " + charEnc );
097 responseHandler.writeAndClose( sb.toString() );
098 }
099
100 /**
101 * @param sb
102 * @param n
103 * @param vc
104 */
105 private void appendChildren( StringBuilder sb, LayerGroup layerGroup ) {
106
107 List<MapModelEntry> mme = layerGroup.getMapModelEntries();
108
109 if ( mme.size() > 0 ) {
110
111 sb.append( ", 'children' : [" );
112 for ( int i = 0; i < mme.size(); i++ ) {
113 if ( mme.get( i ) instanceof MMLayer ) {
114 MMLayer layer = (MMLayer) mme.get( i );
115 URL s = null;
116 if ( layer.getLayer().getStyleList().getCurrentStyle().getLegendURL() != null ) {
117 s = layer.getLayer().getStyleList().getCurrentStyle().getLegendURL().getOnlineResource();
118 }
119 sb.append( "{'text' : " );
120 sb.append( "'" ).append( layer.getTitle() ).append( "'," );
121 sb.append( "'id' : '" ).append( layer.getLayer().getExtension().getIdentifier() ).append( "'," );
122 if ( s != null ) {
123 sb.append( "'img' : '" ).append( s.toExternalForm() ).append( "'," );
124 }
125 if ( layer.getLayer().getAbstract() != null ) {
126 sb.append( "'qtip': '" ).append( layer.getLayer().getAbstract() ).append( "'," );
127 } else {
128 sb.append( "'qtip': '" ).append( layer.getTitle() ).append( "'," );
129 }
130 if ( scale < layer.getLayer().getExtension().getMinScaleHint()
131 || scale > layer.getLayer().getExtension().getMaxScaleHint() ) {
132 sb.append( "'disabled': true," );
133 }
134 sb.append( "'checked': " ).append( layer.isHidden() ? "false," : "true," );
135 sb.append( "'leaf' : true, 'cls' : 'file'}" );
136 if ( i < mme.size() - 1 ) {
137 sb.append( ',' );
138 }
139 } else {
140 LayerGroup lg = (LayerGroup) mme.get( i );
141 sb.append( "{'text' : " );
142 sb.append( "'" ).append( lg.getTitle() ).append( "'," );
143 sb.append( "'id' : '" ).append( lg.getIdentifier() ).append( "'," );
144 sb.append( "'checked': " ).append( !lg.isHidden() ).append( "," );
145 sb.append( "'expanded': " ).append( lg.isExpanded() ).append( "," );
146 sb.append( "'leaf' : false, 'cls' : 'folder' " );
147 appendChildren( sb, lg );
148 sb.append( "}" );
149 if ( i < mme.size() - 1 ) {
150 sb.append( ',' );
151 }
152 }
153 }
154 sb.append( "]" );
155 }
156
157 }
158
159 }