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/*
* BoundedElement.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 mark@kitfox.com. Salamander and other
* projects can be found at http://www.kitfox.com
*
* Created on January 26, 2004, 9:00 AM
*/
package com.kitfox.svg;
import com.kitfox.svg.xml.StyleAttribute;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
/**
* Maintains bounding box for this element
*
* @author Mark McKay
* @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
*/
public class TransformableElement extends SVGElement
{
AffineTransform xform = null;
// AffineTransform invXform = null;
/** Creates a new instance of BoundedElement */
public TransformableElement()
{
}
public TransformableElement(String id, SVGElement parent)
{
super(id, parent);
}
/**
* Fetches a copy of the cached AffineTransform. Note that this
* value will only be valid after the node has been updated.
*
* @return
*/
public AffineTransform getXForm()
{
return new AffineTransform(xform);
}
/*
public void loaderStartElement(SVGLoaderHelper helper, Attributes attrs, SVGElement parent)
{
//Load style string
super.loaderStartElement(helper, attrs, parent);
String transform = attrs.getValue("transform");
if (transform != null)
{
xform = parseTransform(transform);
}
}
*/
protected void build() throws SVGException
{
super.build();
StyleAttribute sty = new StyleAttribute();
if (getPres(sty.setName("transform")))
{
xform = parseTransform(sty.getStringValue());
}
}
protected Shape shapeToParent(Shape shape)
{
if (xform == null) return shape;
return xform.createTransformedShape(shape);
}
protected Rectangle2D boundsToParent(Rectangle2D rect)
{
if (xform == null) return rect;
return xform.createTransformedShape(rect).getBounds2D();
}
/**
* 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
{
StyleAttribute sty = new StyleAttribute();
if (getPres(sty.setName("transform")))
{
AffineTransform newXform = parseTransform(sty.getStringValue());
if (!newXform.equals(xform))
{
xform = newXform;
return true;
}
}
return false;
}
}
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