001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/graphics/displayelements/DisplayElement.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.awt.Graphics;
039
040 import org.deegree.graphics.transformation.GeoTransform;
041 import org.deegree.model.feature.Feature;
042
043 /**
044 * Basic interface for all display elements. A <code>DisplayElement</code> is associated to one
045 * {@link Feature} instance that may have a geometry property or not (which is the common case).
046 *
047 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
048 * @author <a href="mailto:mschneider@lat-lon.de">Markus Schneider</a>
049 * @author last edited by: $Author: mschneider $
050 *
051 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
052 */
053 public interface DisplayElement {
054
055 /**
056 * Returns the associated {@link Feature}.
057 *
058 * @return the associated feature
059 */
060 Feature getFeature();
061
062 /**
063 * Sets the associated {@link Feature}.
064 *
065 * @param feature
066 */
067 void setFeature( Feature feature );
068
069 /**
070 * Returns the id of the associated feature.
071 *
072 * @return the associated feature's id
073 */
074 String getAssociateFeatureId();
075
076 /**
077 * Renders the <code>DisplayElement</code> to the submitted graphic context.
078 *
079 * @param g
080 * graphics context to render to
081 * @param projection
082 * @param scale
083 */
084 void paint( Graphics g, GeoTransform projection, double scale );
085
086 /**
087 * Sets the selection state of the <code>DisplayElement</code>.
088 *
089 * @param selected
090 * true, if the <code>DisplayElement</code> is selected, false otherwise
091 */
092 void setSelected( boolean selected );
093
094 /**
095 * Returns whether the <code>DisplayElement</code> is selected.
096 *
097 * @return true, if the <code>DisplayElement</code> is selected, false otherwise
098 */
099 boolean isSelected();
100
101 /**
102 * Sets the highlighting state of the <code>DisplayElement</code>.
103 *
104 * @param highlighted
105 * true, if the <code>DisplayElement</code> is highlighted, false otherwise
106 */
107 void setHighlighted( boolean highlighted );
108
109 /**
110 * Returns whether the <code>DisplayElement</code> is highlighted.
111 *
112 * @return true, if the <code>DisplayElement</code> is highlighted, false otherwise
113 */
114 boolean isHighlighted();
115
116 /**
117 * Returns whether the <code>DisplayElement</code> should be painted at the given scale.
118 *
119 * @param scale
120 * scale to check
121 * @return true, if the <code>DisplayElement</code> has to be painted, false otherwise
122 */
123 boolean doesScaleConstraintApply( double scale );
124 }