001 //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/graphics/displayelements/AbstractDisplayElement.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.displayelements;
037
038 import java.io.Serializable;
039
040 import org.deegree.model.feature.Feature;
041
042 /**
043 * Base class for all display elements.
044 * <p>
045 * A <code>DisplayElement</code> is associated to one feature that may have a geometry property or not (this is the
046 * common case).
047 *
048 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
049 * @author <a href="mailto:mschneider@lat-lon.de">Markus Schneider</a>
050 * @author last edited by: $Author: mschneider $
051 *
052 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
053 */
054 abstract class AbstractDisplayElement implements DisplayElement, Serializable {
055
056 /** Use serialVersionUID for interoperability. */
057 private final static long serialVersionUID = 1226236249388451855L;
058
059 /**
060 * The feature to display
061 */
062 protected Feature feature;
063
064 private boolean highlighted;
065
066 private boolean selected;
067
068 /**
069 * An empty constructor doing nothing
070 */
071 AbstractDisplayElement() {
072 // nothing
073 }
074
075 /**
076 *
077 *
078 * @param feature
079 */
080 AbstractDisplayElement( Feature feature ) {
081 if ( feature != null ) {
082 setFeature( feature );
083 }
084 }
085
086 /**
087 * Returns the associated <tt>Feature</tt>.
088 *
089 */
090 public Feature getFeature() {
091 return feature;
092 }
093
094 /**
095 * sets the feature encapsulated by a DisplayElement
096 *
097 * @param feature
098 */
099 public void setFeature( Feature feature ) {
100 this.feature = new ScaledFeature( feature, -1 );
101 }
102
103 /**
104 * returns the id of the feature that's associated with the DisplayElement
105 */
106 public String getAssociateFeatureId() {
107 return feature.getId();
108 }
109
110 /**
111 * marks a <tt>DisplayElement</tt> as selected or not
112 *
113 */
114 public void setSelected( boolean selected ) {
115 this.selected = selected;
116 }
117
118 /**
119 * returns if the <tt>DisplayElement</tt> is selected or not
120 *
121 */
122 public boolean isSelected() {
123 return selected;
124 }
125
126 /**
127 * marks the <tt>DisplayElement</tt> as highlighted or not
128 *
129 */
130 public void setHighlighted( boolean highlighted ) {
131 this.highlighted = highlighted;
132 }
133
134 /**
135 * returns if the <tt>DisplayElement</tt> is highlighted or not.
136 *
137 */
138 public boolean isHighlighted() {
139 return highlighted;
140 }
141
142 /**
143 * Returns whether the <code>DisplayElement</code> should be painted at the current scale or not.
144 */
145 public abstract boolean doesScaleConstraintApply( double scale );
146 }