001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/graphics/displayelements/AbstractDisplayElement.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2008 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstr. 19
030 53177 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042
043 ---------------------------------------------------------------------------*/
044 package org.deegree.graphics.displayelements;
045
046 import java.io.Serializable;
047
048 import org.deegree.model.feature.Feature;
049
050 /**
051 * Base class for all display elements.
052 * <p>
053 * A <code>DisplayElement</code> is associated to one feature that may have a geometry property or
054 * not (this is the common case).
055 *
056 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
057 * @author <a href="mailto:mschneider@lat-lon.de">Markus Schneider</a>
058 * @author last edited by: $Author: apoth $
059 *
060 * @version $Revision: 9340 $, $Date: 2007-12-27 13:32:12 +0100 (Do, 27 Dez 2007) $
061 */
062 abstract class AbstractDisplayElement implements DisplayElement, Serializable {
063
064 /** Use serialVersionUID for interoperability. */
065 private final static long serialVersionUID = 1226236249388451855L;
066
067 protected Feature feature;
068
069 private boolean highlighted;
070
071 private boolean selected;
072
073 AbstractDisplayElement() {
074 }
075
076 /**
077 *
078 *
079 * @param feature
080 */
081 AbstractDisplayElement( Feature feature ) {
082 if ( feature != null ) {
083 setFeature( feature );
084 }
085 }
086
087 /**
088 * Returns the associated <tt>Feature</tt>.
089 *
090 */
091 public Feature getFeature() {
092 return feature;
093 }
094
095 /**
096 * sets the feature encapsulated by a DisplayElement
097 *
098 * @param feature
099 */
100 public void setFeature( Feature feature ) {
101 this.feature = new ScaledFeature( feature, -1 );
102 }
103
104 /**
105 * returns the id of the feature that's associated with the DisplayElement
106 */
107 public String getAssociateFeatureId() {
108 return feature.getId();
109 }
110
111 /**
112 * marks a <tt>DisplayElement</tt> as selected or not
113 *
114 */
115 public void setSelected( boolean selected ) {
116 this.selected = selected;
117 }
118
119 /**
120 * returns if the <tt>DisplayElement</tt> is selected or not
121 *
122 */
123 public boolean isSelected() {
124 return selected;
125 }
126
127 /**
128 * marks the <tt>DisplayElement</tt> as highlighted or not
129 *
130 */
131 public void setHighlighted( boolean highlighted ) {
132 this.highlighted = highlighted;
133 }
134
135 /**
136 * returns if the <tt>DisplayElement</tt> is highlighted or not.
137 *
138 */
139 public boolean isHighlighted() {
140 return highlighted;
141 }
142
143 /**
144 * Returns whether the <code>DisplayElement</code> should be painted at the current scale or
145 * not.
146 */
147 public abstract boolean doesScaleConstraintApply( double scale );
148 }