001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/graphics/Layer.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;
037
038 import org.deegree.model.crs.CoordinateSystem;
039 import org.deegree.model.spatialschema.Envelope;
040
041 /**
042 * A Layer is a collection of <tt>Feature</tt>s or rasters building a thematic 'unit' waterways
043 * or country borders for example. <tt>Feature</tt>s or raster can be added or removed from the
044 * layer. A <tt>Feature</tt> or raster can e changed by a modul of the application using the layer
045 * because only references to <tt>Feature</tt>s or rasters are stored within a layer.
046 *
047 * <p>
048 * ------------------------------------------------------------------------
049 * </p>
050 *
051 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
052 * @version $Revision: 18195 $ $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
053 */
054
055 public interface Layer {
056 /**
057 * returns the name of the layer
058 * @return the name of the layer
059 */
060 String getName();
061
062 /**
063 * returns the BoundingBox (Envelope) of Layer. This is the BoundingBox of the layers data. The
064 * BoundingBox of the View maybe larger or smaler
065 * @return the BoundingBox (Envelope) of Layer
066 */
067 Envelope getBoundingBox();
068
069 /**
070 * returns the coordinate reference system of the MapView
071 * @return the coordinate reference system of the MapView
072 *
073 */
074 CoordinateSystem getCoordinatesSystem();
075
076 /**
077 * sets the coordinate reference system of the MapView. If a new crs is set all geometries of
078 * GeometryFeatures will be transformed to the new coordinate reference system.
079 * @param crs to set
080 * @throws Exception if something went wrong
081 *
082 */
083 void setCoordinatesSystem( CoordinateSystem crs )
084 throws Exception;
085
086 /**
087 * adds an eventcontroller to the MapView that's responsible for handling events that targets the
088 * map. E.g.: zooming, panning, selecting a feature etc.
089 * @param obj an event controller
090 */
091 void addEventController( LayerEventController obj );
092
093 /**
094 * @param obj the eventcontroller to remove
095 * @see Layer#addEventController(LayerEventController)
096 */
097 void removeEventController( LayerEventController obj );
098 }