path: root/src/main/java/com/kitfox/svg/Use.java

/*
 * 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 mark@kitfox.com.  Salamander and other
 * projects can be found at http://www.kitfox.com
 *
 * Created on January 26, 2004, 1:54 AM
 */

package com.kitfox.svg;

import com.kitfox.svg.xml.StyleAttribute;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.net.URI;

/**
 * @author Mark McKay
 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
 */
public class Use extends ShapeElement {

    float x = 0f;
    float y = 0f;
    float width = 1f;
    float height = 1f;

//    SVGElement href = null;
    URI href = null;

    AffineTransform refXform;

    /** Creates a new instance of LinearGradient */
    public Use() {
    }

    protected void build() throws SVGException
    {
        super.build();
        
        StyleAttribute sty = new StyleAttribute();
        
        if (getPres(sty.setName("x"))) 
        {
            x = sty.getFloatValueWithUnits();
        }

        if (getPres(sty.setName("y")))
        {
            y = sty.getFloatValueWithUnits();
        }

        if (getPres(sty.setName("width"))) 
        {
            width = sty.getFloatValueWithUnits();
        }

        if (getPres(sty.setName("height")))
        {
            height = sty.getFloatValueWithUnits();
        }

        if (getPres(sty.setName("xlink:href")))
        {
            URI src = sty.getURIValue(getXMLBase());
            href = src;
//            href = diagram.getUniverse().getElement(src);
        }
        
        //Determine use offset/scale
        refXform = new AffineTransform();
        refXform.translate(this.x, this.y);
    }
    
    public void render(Graphics2D g) throws SVGException
    {
        beginLayer(g);

        //AffineTransform oldXform = g.getTransform();
        AffineTransform oldXform = g.getTransform();
        g.transform(refXform);

        SVGElement ref = diagram.getUniverse().getElement(href);

        if (ref == null || !(ref instanceof RenderableElement)) return;

        RenderableElement rendEle = (RenderableElement)ref;
        rendEle.pushParentContext(this);
        rendEle.render(g);
        rendEle.popParentContext();

        g.setTransform(oldXform);

        finishLayer(g);
    }

    public Shape getShape()
    {
        SVGElement ref = diagram.getUniverse().getElement(href);
        if (ref instanceof ShapeElement)
        {
            Shape shape = ((ShapeElement)ref).getShape();
            shape = refXform.createTransformedShape(shape);
            shape = shapeToParent(shape);
            return shape;
        }

        return null;
    }

    public Rectangle2D getBoundingBox() throws SVGException
    {
        SVGElement ref = diagram.getUniverse().getElement(href);
        if (ref instanceof ShapeElement)
        {
            ShapeElement shapeEle = (ShapeElement)ref;
            shapeEle.pushParentContext(this);
            Rectangle2D bounds = shapeEle.getBoundingBox();
            shapeEle.popParentContext();
            
            bounds = refXform.createTransformedShape(bounds).getBounds2D();
            bounds = boundsToParent(bounds);

            return bounds;
        }

        return null;
    }

    /**
     * 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;
        boolean changeState = super.updateTime(curTime);

        //Get current values for parameters
        StyleAttribute sty = new StyleAttribute();
        boolean shapeChange = false;
        
        if (getPres(sty.setName("x")))
        {
            float newVal = sty.getFloatValueWithUnits();
            if (newVal != x)
            {
                x = newVal;
                shapeChange = true;
            }
        }

        if (getPres(sty.setName("y")))
        {
            float newVal = sty.getFloatValueWithUnits();
            if (newVal != y)
            {
                y = newVal;
                shapeChange = true;
            }
        }

        if (getPres(sty.setName("width")))
        {
            float newVal = sty.getFloatValueWithUnits();
            if (newVal != width)
            {
                width = newVal;
                shapeChange = true;
            }
        }

        if (getPres(sty.setName("height")))
        {
            float newVal = sty.getFloatValueWithUnits();
            if (newVal != height)
            {
                height = newVal;
                shapeChange = true;
            }
        }
        
        if (getPres(sty.setName("xlink:href")))
        {
            URI src = sty.getURIValue(getXMLBase());
//            SVGElement newVal = diagram.getUniverse().getElement(src);
            if (!src.equals(href))
            {
                href = src;
                shapeChange = true;
            }
        }
/*
        if (getPres(sty.setName("xlink:href")))
        {
            URI src = sty.getURIValue(getXMLBase());
            href = diagram.getUniverse().getElement(src);
        }
        
        //Determine use offset/scale
        refXform = new AffineTransform();
        refXform.translate(this.x, this.y);
        refXform.scale(this.width, this.height);
*/        
        if (shapeChange)
        {
            build();
            //Determine use offset/scale
//            refXform.setToTranslation(this.x, this.y);
//            refXform.scale(this.width, this.height);
//            return true;
        }
        
        return changeState || shapeChange;
    }
}