/*---------------- FILE HEADER ------------------------------------------
This file is part of deegree.
Copyright (C) 2001-2006 by:
EXSE, Department of Geography, University of Bonn
http://www.giub.uni-bonn.de/deegree/
lat/lon GmbH
http://www.lat-lon.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Contact:
Andreas Poth
lat/lon GmbH
Aennchenstr. 19
53115 Bonn
Germany
E-Mail: poth@lat-lon.de
Prof. Dr. Klaus Greve
Department of Geography
University of Bonn
Meckenheimer Allee 166
53115 Bonn
Germany
E-Mail: greve@giub.uni-bonn.de
---------------------------------------------------------------------------*/
package org.deegree.portal.standard.wms.control;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.HashMap;
import java.util.StringTokenizer;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.deegree.enterprise.control.AbstractListener;
import org.deegree.enterprise.control.FormEvent;
import org.deegree.framework.util.CharsetUtils;
import org.deegree.framework.util.Debug;
import org.deegree.ogcwebservices.wms.operation.GetMap;
import org.deegree.portal.context.ViewContext;
/**
* Basic class for all listerens that shall be notified if a map
* cliented raises an action/event.<p></p>
* There are several predefined listeres for actions that most
* map clients support:
* <ul>
* <li><tt>ZoomInListener</tt> for handling zoomin actions. supported
* are zooming via point or vie rectangle.
* <li><tt>ZoomOutListener</tt> for handling zoomout action.
* <li><tt>PanListener</tt> for handling of pan action. supported
* is panning to eight directions.
* <li><tt>RecenterListener</tt> recenters the map to a specified point.
* This can be interpreted as a special versio of zooming
* <li><tt>RefreshListener</tt> reloads the map without any change
* <li><tt>ResetListener</tt> recovers the initial status of the map
* <li><tt>InfoListener</tt> will be notified if a feature info request
* should be send.
* </ul>
* The user can additional listeners/action by extending the
* <tt>AbstractActionListener</tt> class or one of the predefined
* listener.<p></p>
* Each Listerner have to be registered to the <tt>MapListener</tt>
* which is the class that will be informed about each event/action
* within a map client. To register a class as listener it has to
* stored within the MapListener.ConfigurationFile.
*
* <p>---------------------------------------------------------------------</p>
*
* @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
* @version $Revision: 1.7 $ $Date: 2006/10/17 20:31:17 $
*/
abstract class AbstractMapListener extends AbstractListener {
/**
*
*
* @param event
*/
public void actionPerformed( FormEvent event ) {
Debug.debugMethodBegin( this, "actionPerformed" );
HttpSession session = ( (HttpServletRequest)getRequest() ).getSession();
// get configuration from the users session
//WMSClientConfiguration config =
// (WMSClientConfiguration)session.getAttribute( Constants.WMSCLIENTCONFIGURATION );
ViewContext vc = (ViewContext)session.getAttribute( "DefaultMapContext" );
// if no configuration is stored in the session get default config
if ( vc == null ) {
// get default client configuration
//config = MapApplicationHandler.getDefaultClientConfiguration();
//vc = MapApplicationHandler.getDefaultWebMapContext();
}
this.getRequest().setAttribute( "MapContext", vc );
Debug.debugMethodEnd();
}
/**
* maps a string representation of a request to a <tt>HashMap</tt>
*/
protected HashMap toMap( String request ) {
int p = request.indexOf( '?' );
if ( p >= 0 ) {
request = request.substring( p+1, request.length() );
}
StringTokenizer st = new StringTokenizer( request, "&" );
HashMap map = new HashMap();
while ( st.hasMoreTokens() ) {
String s = st.nextToken();
int pos = s.indexOf( '=' );
String s1 = s.substring( 0, pos );
String s2 = s.substring( pos + 1, s.length() );
try {
map.put( s1.toUpperCase(),
URLDecoder.decode(s2, CharsetUtils.getSystemCharset()) );
} catch ( UnsupportedEncodingException e ) {
e.printStackTrace();
}
}
return map;
}
/**
* the method returns the scale of the map defined as diagonal size
* of a pixel at the center of the map.
*/
protected double getScale( GetMap mrm ) {
double minx = mrm.getBoundingBox().getMin().getX();
double maxx = mrm.getBoundingBox().getMax().getX();
double miny = mrm.getBoundingBox().getMin().getY();
double maxy = mrm.getBoundingBox().getMax().getY();
double width = mrm.getWidth();
double height = mrm.getHeight();
double sx = Math.sqrt( Math.pow( maxx - minx, 2 ) + Math.pow( maxy - miny, 2 ) );
double px = Math.sqrt( width * width + height * height );
return sx / px;
}
}
/* ********************************************************************
Changes to this class. What the people have been up to:
$Log: AbstractMapListener.java,v $
Revision 1.7 2006/10/17 20:31:17 poth
*** empty log message ***
Revision 1.6 2006/08/29 19:54:13 poth
footer corrected
Revision 1.5 2006/07/12 14:46:18 poth
comment footer added
********************************************************************** */