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A tool for displaying and playing SVG content using the Java2D.
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/*
 * SVG Salamander
 * Copyright (c) 2004, Mark McKay
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or 
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 *   - Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the following
 *     disclaimer.
 *   - Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials 
 *     provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE. 
 * 
 * Mark McKay can be contacted at [email protected].  Salamander and other
 * projects can be found at http://www.kitfox.com
 *
 * Created on September 21, 2004, 11:34 PM
 */

package com.kitfox.svg.animation;

import com.kitfox.svg.xml.StyleAttribute;
import java.awt.geom.*;
import java.util.*;

import com.kitfox.svg.pathcmd.*;
import com.kitfox.svg.*;

/**
 * A track holds the animation events for a single parameter of a single SVG
 * element.  It also contains the default value for the element, should the
 * user want to see the 'unanimated' value.
 *
 * @author Mark McKay
 * @author Mark McKay
 */
public class TrackPath extends TrackBase
{

    public TrackPath(AnimationElement ele) throws SVGElementException
    {
        super(ele.getParent(), ele);
    }

    @Override
    public boolean getValue(StyleAttribute attrib, double curTime)
    {
        GeneralPath path = getValue(curTime);
        if (path == null) return false;

        attrib.setStringValue(PathUtil.buildPathString(path));
        return true;
    }

    public GeneralPath getValue(double curTime)
    {
        GeneralPath retVal = null;
        AnimationTimeEval state = new AnimationTimeEval();

        for (AnimationElement animationElement : animEvents) {
            AnimateBase ele = (AnimateBase)animationElement;
            Animate eleAnim = (Animate)ele;
            ele.evalParametric(state, curTime);

            //Reject value if it is in the invalid state
            if (Double.isNaN(state.interp)) continue;

            if (retVal == null)
            {
                retVal = eleAnim.evalPath(state.interp);
                continue;
            }
            
            GeneralPath curPath = eleAnim.evalPath(state.interp);
            switch (ele.getAdditiveType())
            {
                case AnimationElement.AD_REPLACE:
                    retVal = curPath;
                    break;
                case AnimationElement.AD_SUM:
                    throw new RuntimeException("Not implemented");
//                    retVal = new Color(curCol.getRed() + retVal.getRed(), curCol.getGreen() + retVal.getGreen(), curCol.getBlue() + retVal.getBlue());
//                    break;
                default:
                    throw new RuntimeException();
            }
        }

        return retVal;
    }
}