package net.sf.latexdraw.parsers.svg;
import java.text.ParseException;
import net.sf.latexdraw.parsers.svg.parsers.SVGLengthParser;
import org.w3c.dom.Node;
/**
* Defines the SVG tag <code>ellipse</code>.<br>
*<br>
* This file is part of LaTeXDraw.<br>
* Copyright (c) 2005-2014 Arnaud BLOUIN<br>
*<br>
* LaTeXDraw is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.<br>
*<br>
* LaTeXDraw is distributed without any warranty; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.<br>
*<br>
* 10/11/07<br>
* @author Arnaud BLOUIN
* @version 3.0
* @since 0.1
*/
public class SVGEllipseElement extends SVGElement {
/**
* {@link SVGElement#SVGElement(Node, SVGElement)}
*/
public SVGEllipseElement(final Node n, final SVGElement p) throws MalformedSVGDocument {
super(n, p);
}
/**
* Creates an SVG ellipse element.
* @param cx The X-centre coordinate.
* @param cy The Y-centre coordinate.
* @param rx The X-radius of the ellipse.
* @param ry The Y-radius of the ellipse.
* @param owner The document owner.
* @throws IllegalArgumentException If owner is null or if a given value is not valid.
* @since 0.1
*/
public SVGEllipseElement(final double cx, final double cy, final double rx, final double ry, final SVGDocument owner) {
super(owner);
setAttribute(SVGAttributes.SVG_CX, String.valueOf(cx));
setAttribute(SVGAttributes.SVG_CY, String.valueOf(cy));
setAttribute(SVGAttributes.SVG_RX, String.valueOf(rx));
setAttribute(SVGAttributes.SVG_RY, String.valueOf(ry));
setNodeName(SVGElements.SVG_ELLIPSE);
ownerDocument = owner;
if(!checkAttributes())
throw new IllegalArgumentException();
}
/**
* Creates an empty ellipse.
* @param doc The owner document.
* @since 0.1
*/
public SVGEllipseElement(final SVGDocument doc) {
super(doc);
setNodeName(SVGElements.SVG_ELLIPSE);
setAttribute(SVGAttributes.SVG_RX, "0");//$NON-NLS-1$
setAttribute(SVGAttributes.SVG_RY, "0");//$NON-NLS-1$
}
/**
* @return The x-axis coordinate of the centre of the ellipse (0 if there it does not exist or it is not a coordinate).
* @since 0.1
*/
public double getCx() {
final String v = getAttribute(getUsablePrefix()+SVGAttributes.SVG_CX);
double cx;
try { cx = v==null ? 0 : new SVGLengthParser(v).parseCoordinate().getValue(); }
catch(final ParseException e) { cx = 0; }
return cx;
}
/**
* @return The y-axis coordinate of the centre of the ellipse (0 if there it does not exist or it is not a coordinate).
* @since 0.1
*/
public double getCy() {
final String v = getAttribute(getUsablePrefix()+SVGAttributes.SVG_CY);
double cy;
try { cy = v==null ? 0 : new SVGLengthParser(v).parseCoordinate().getValue(); }
catch(final ParseException e) { cy = 0; }
return cy;
}
/**
* @return The x-axis radius of the ellipse (NaN if there it does not exist or it is not a length).
* @since 0.1
*/
public double getRx() {
final String v = getAttribute(getUsablePrefix()+SVGAttributes.SVG_RX);
double rx;
try { rx = v==null ? Double.NaN : new SVGLengthParser(v).parseLength().getValue(); }
catch(final ParseException e) { rx = Double.NaN; }
return rx;
}
/**
* @return The y-axis radius of the ellipse (NaN if there it does not exist or it is not a length).
* @since 0.1
*/
public double getRy() {
final String v = getAttribute(getUsablePrefix()+SVGAttributes.SVG_RY);
double ry;
try { ry = v==null ? Double.NaN : new SVGLengthParser(v).parseLength().getValue(); }
catch(final ParseException e) { ry = Double.NaN; }
return ry;
}
@Override
public boolean checkAttributes() {
final double rx = getRx();
final double ry = getRy();
return !Double.isNaN(rx) && !Double.isNaN(ry) && rx>=0 && ry>=0;
}
@Override
public boolean enableRendering() {
return getRx()!=0 && getRy()!=0 ;
}
}