001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/framework/util/ColorUtils.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.framework.util;
037
038 import java.awt.Color;
039
040 /**
041 * offeres some methods for handling colors
042 *
043 *
044 * @version $Revision: 18195 $
045 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
046 * @author last edited by: $Author: mschneider $
047 *
048 * @version 1.0. $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
049 *
050 * @since 2.0
051 */
052 public class ColorUtils {
053
054 /**
055 * returns a random color
056 *
057 * @param useTransparency
058 * @return a random color
059 */
060 public static Color getRandomColor( boolean useTransparency ) {
061 float r = (float) Math.random();
062 float g = (float) Math.random();
063 float b = (float) Math.random();
064 float a = 0;
065 if ( useTransparency ) {
066 a = (float) Math.random() / 1.5f;
067 }
068 return new Color( r, g, b, a );
069 }
070
071 /**
072 * transforms the color of the request from java.awt.Color to the hexadecimal representation as
073 * in an OGC conform WMS-GetMap request (e.g. white == "#ffffff").
074 * @param prefix to add to the hex
075 * @param color to get hex code from
076 *
077 * @return the color as hexadecimal representation
078 */
079 public static String toHexCode( String prefix, Color color ) {
080 String r = Integer.toHexString( color.getRed() );
081 if ( r.length() < 2 )
082 r = "0" + r;
083 String g = Integer.toHexString( color.getGreen() );
084 if ( g.length() < 2 )
085 g = "0" + g;
086 String b = Integer.toHexString( color.getBlue() );
087 if ( b.length() < 2 )
088 b = "0" + b;
089 return prefix + r + g + b;
090 }
091
092 }