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>ciricle</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 SVGCircleElement extends SVGElement {
/**
* {@link SVGElement#SVGElement(Node, SVGElement)}
*/
public SVGCircleElement(final Node n, final SVGElement p) throws MalformedSVGDocument {
super(n, p);
}
/**
* Creates a circle with a radius equal to 0.
* @param doc The owner document.
* @since 0.1
*/
public SVGCircleElement(final SVGDocument doc) {
super(doc);
setNodeName(SVGElements.SVG_CIRCLE);
setAttribute(SVGAttributes.SVG_R, "0");//$NON-NLS-1$
}
/**
* Creates an SVG circle element.
* @param cx The X-centre coordinate.
* @param cy The Y-centre coordinate.
* @param r The radius of the circle.
* @param owner The document owner.
* @throws IllegalArgumentException If owner is null or if a given value is not valid.
* @since 0.1
*/
public SVGCircleElement(final double cx, final double cy, final double r, final SVGDocument owner) {
super(owner);
setAttribute(SVGAttributes.SVG_CX, String.valueOf(cx));
setAttribute(SVGAttributes.SVG_CY, String.valueOf(cy));
setAttribute(SVGAttributes.SVG_R, String.valueOf(r));
setNodeName(SVGElements.SVG_CIRCLE);
ownerDocument = owner;
if(!checkAttributes())
throw new IllegalArgumentException();
}
/**
* @return The x-axis coordinate of the centre of the circle (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 circle (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 radius of the circle (NaN if there it does not exist or it is not a length).
* @since 0.1
*/
public double getR() {
final String v = getAttribute(getUsablePrefix()+SVGAttributes.SVG_R);
double r;
try { r = v==null ? Double.NaN : new SVGLengthParser(v).parseLength().getValue(); }
catch(final ParseException e) { r = Double.NaN; }
return r;
}
/**
* Sets the X-coordinate of the circle.
* @param cx The new X-coordinate of the circle.
* @since 0.1
*/
public void setCx(final double cx) {
setAttribute(getUsablePrefix()+SVGAttributes.SVG_CX, String.valueOf(cx));
}
/**
* Sets the Y-coordinate of the circle.
* @param cy The new Y-coordinate of the circle.
* @since 0.1
*/
public void setCy(final double cy) {
setAttribute(getUsablePrefix()+SVGAttributes.SVG_CY, String.valueOf(cy));
}
/**
* Sets the radius of the circle.
* @param width The new radius of the circle.
* @since 0.1
*/
public void setR(final double width) {
if(width>=0.)
setAttribute(getUsablePrefix()+SVGAttributes.SVG_R, String.valueOf(width));
}
@Override
public boolean checkAttributes() {
final double r = getR();
return !Double.isNaN(r) && r>=0.;
}
@Override
public boolean enableRendering() {
final double r = getR();
return r>0. || r<0. ;
}
}