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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.Graphics2D;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Area;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.net.URI;
import java.util.List;
/**
* Maintains bounding box for this element
*
* @author Mark McKay
* @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
*/
abstract public class RenderableElement extends TransformableElement
{
AffineTransform cachedXform = null;
Shape cachedClip = null;
public static final int VECTOR_EFFECT_NONE = 0;
public static final int VECTOR_EFFECT_NON_SCALING_STROKE = 1;
int vectorEffect;
/** Creates a new instance of BoundedElement */
public RenderableElement() {
}
public RenderableElement(String id, SVGElement parent)
{
super(id, parent);
}
protected void build() throws SVGException
{
super.build();
StyleAttribute sty = new StyleAttribute();
if (getPres(sty.setName("vector-effect")))
{
if ("non-scaling-stroke".equals(sty.getStringValue()))
{
vectorEffect = VECTOR_EFFECT_NON_SCALING_STROKE;
}
else
{
vectorEffect = VECTOR_EFFECT_NONE;
}
}
else
{
vectorEffect = VECTOR_EFFECT_NONE;
}
}
abstract public void render(Graphics2D g) throws SVGException;
abstract void pick(Point2D point, boolean boundingBox, List retVec) throws SVGException;
abstract void pick(Rectangle2D pickArea, AffineTransform ltw, boolean boundingBox, List retVec) throws SVGException;
abstract public Rectangle2D getBoundingBox() throws SVGException;
/*
public void loaderStartElement(SVGLoaderHelper helper, Attributes attrs, SVGElement parent)
{
super.loaderStartElement(helper, attrs, parent);
}
*/
/**
* Pushes transform stack, transforms to local coordinates and sets up
* clipping mask.
*/
protected void beginLayer(Graphics2D g) throws SVGException
{
if (xform != null)
{
cachedXform = g.getTransform();
g.transform(xform);
}
StyleAttribute styleAttrib = new StyleAttribute();
//Get clipping path
// StyleAttribute styleAttrib = getStyle("clip-path", false);
Shape clipPath = null;
int clipPathUnits = ClipPath.CP_USER_SPACE_ON_USE;
if (getStyle(styleAttrib.setName("clip-path")))
{
URI uri = styleAttrib.getURIValue(getXMLBase());
if (uri != null)
{
ClipPath ele = (ClipPath)diagram.getUniverse().getElement(uri);
clipPath = ele.getClipPathShape();
clipPathUnits = ele.getClipPathUnits();
}
}
//Return if we're out of clipping range
if (clipPath != null)
{
if (clipPathUnits == ClipPath.CP_OBJECT_BOUNDING_BOX && (this instanceof ShapeElement))
{
Rectangle2D rect = ((ShapeElement)this).getBoundingBox();
AffineTransform at = new AffineTransform();
at.scale(rect.getWidth(), rect.getHeight());
clipPath = at.createTransformedShape(clipPath);
}
cachedClip = g.getClip();
Area newClip = new Area(cachedClip);
newClip.intersect(new Area(clipPath));
g.setClip(newClip);
}
}
/**
* Restores transform and clipping values to the way they were before
* this layer was drawn.
*/
protected void finishLayer(Graphics2D g)
{
if (cachedClip != null)
{
g.setClip(cachedClip);
}
if (cachedXform != null)
{
g.setTransform(cachedXform);
}
}
}
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