001 /*
002 * TrackManager.java
003 *
004 * The Salamander Project - 2D and 3D graphics libraries in Java
005 * Copyright (C) 2004 Mark McKay
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this library; if not, write to the Free Software
019 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020 *
021 * Mark McKay can be contacted at mark@kitfox.com. Salamander and other
022 * projects can be found at http://www.kitfox.com
023 *
024 * Created on September 21, 2004, 11:34 PM
025 */
026
027 package com.kitfox.svg.animation;
028
029 import com.kitfox.svg.xml.StyleAttribute;
030 import java.awt.*;
031 import java.util.*;
032
033 import com.kitfox.svg.*;
034 import com.kitfox.svg.xml.*;
035
036 /**
037 * A track holds the animation events for a single parameter of a single SVG
038 * element. It also contains the default value for the element, should the
039 * user want to see the 'unanimated' value.
040 *
041 * @author Mark McKay
042 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
043 */
044 public class TrackColor extends TrackBase
045 {
046
047 public TrackColor(AnimationElement ele) throws SVGElementException
048 {
049 super(ele.getParent(), ele);
050 }
051
052 public boolean getValue(StyleAttribute attrib, double curTime)
053 {
054 Color col = getValue(curTime);
055 if (col == null) return false;
056
057 attrib.setStringValue("#" + Integer.toHexString(col.getRGB()));
058 return true;
059 }
060
061 public Color getValue(double curTime)
062 {
063 Color retVal = null;
064 AnimationTimeEval state = new AnimationTimeEval();
065
066 for (Iterator it = animEvents.iterator(); it.hasNext();)
067 {
068 AnimateBase ele = (AnimateBase)it.next();
069 AnimateColorIface eleColor = (AnimateColorIface)ele;
070 ele.evalParametric(state, curTime);
071
072 //Reject value if it is in the invalid state
073 if (Double.isNaN(state.interp)) continue;
074
075 if (retVal == null)
076 {
077 retVal = eleColor.evalColor(state.interp);
078 continue;
079 }
080
081 Color curCol = eleColor.evalColor(state.interp);
082 switch (ele.getAdditiveType())
083 {
084 case AnimationElement.AD_REPLACE:
085 retVal = curCol;
086 break;
087 case AnimationElement.AD_SUM:
088 retVal = new Color(curCol.getRed() + retVal.getRed(), curCol.getGreen() + retVal.getGreen(), curCol.getBlue() + retVal.getBlue());
089 break;
090 }
091 }
092
093 return retVal;
094 }
095 }