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SVG Salamander - tools and components for SVG rendering, manipulation and animation
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/*
 * Stop.java
 *
 *
 *  The Salamander Project - 2D and 3D graphics libraries in Java
 *  Copyright (C) 2004 Mark McKay
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 *  Mark McKay can be contacted at [email protected].  Salamander and other
 *  projects can be found at http://www.kitfox.com
 *
 * Created on January 26, 2004, 1:56 AM
 */

package com.kitfox.svg;

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

import com.kitfox.svg.xml.*;
import org.xml.sax.*;

/**
 * @author Mark McKay
 * @author Mark McKay
 */
public class Stop extends SVGElement {

    float offset = 0f;
    float opacity = 1f;
    Color color = Color.black;

    /** Creates a new instance of Stop */
    public Stop() {
    }
/*
    public void loaderStartElement(SVGLoaderHelper helper, Attributes attrs, SVGElement parent)
    {
		//Load style string
        super.loaderStartElement(helper, attrs, parent);

        String offset = attrs.getValue("offset");
        this.offset = (float)XMLParseUtil.parseRatio(offset);

        buildStop();
    }
    */
    
    protected void build() throws SVGException
    {
        super.build();
        
        StyleAttribute sty = new StyleAttribute();
        
        if (getPres(sty.setName("offset")))
        {
            offset = sty.getFloatValue();
            String units = sty.getUnits();
            if (units != null && units.equals("%")) offset /= 100f;
            if (offset > 1) offset = 1;
            if (offset < 0) offset = 0;
        }
        
        if (getStyle(sty.setName("stop-color"))) color = sty.getColorValue();

        if (getStyle(sty.setName("stop-opacity"))) opacity = sty.getRatioValue();
    }

    /**
     * Updates all attributes in this diagram associated with a time event.
     * Ie, all attributes with track information.
     * @return - true if this node has changed state as a result of the time
     * update
     */
    public boolean updateTime(double curTime) throws SVGException
    {
//        if (trackManager.getNumTracks() == 0) return false;

        //Get current values for parameters
        StyleAttribute sty = new StyleAttribute();
        boolean shapeChange = false;
        
        if (getPres(sty.setName("offset")))
        {
            float newVal = sty.getFloatValue();
            if (newVal != offset)
            {
                offset = newVal;
                shapeChange = true;
            }
        }
        
        if (getPres(sty.setName("stop-color")))
        {
            Color newVal = sty.getColorValue();
            if (newVal != color)
            {
                color = newVal;
                shapeChange = true;
            }
        }
        
        if (getPres(sty.setName("stop-opacity")))
        {
            float newVal = sty.getFloatValue();
            if (newVal != opacity)
            {
                opacity = newVal;
                shapeChange = true;
            }
        }
        
        return shapeChange;
    }
}