/**
                             * <a href="http://www.w3.org/TR/SVG/">SVG</a> implementation of the <a href="Circle.html">`Circle`</a> class.
                             * `SVGCircle` is not intended to be used directly. Instead, use the <a href="Circle.html">`Circle`</a> class.
                             * If the browser has <a href="http://www.w3.org/TR/SVG/">SVG</a> capabilities, the <a href="Circle.html">`Circle`</a>
                             * class will point to the `SVGCircle` class.
                             *
                             * @module graphics
                             * @class SVGCircle
                             * @constructor
                             */
                             SVGCircle = function()
                             {
                                SVGCircle.superclass.constructor.apply(this, arguments);
                             };
                            
                             SVGCircle.NAME = "circle";
                            
                             Y.extend(SVGCircle, Y.SVGShape, {
                            
                                /**
                                 * Indicates the type of shape
                                 *
                                 * @property _type
                                 * @type String
                                 * @private
                                 */
                                _type: "circle",
                            
                                /**
                                 * Updates the shape.
                                 *
                                 * @method _draw
                                 * @private
                                 */
                                _draw: function()
                                {
                                    var node = this.node,
                                        x = this.get("x"),
                                        y = this.get("y"),
                                        radius = this.get("radius"),
                                        cx = x + radius,
                                        cy = y + radius;
                                    node.setAttribute("r", radius);
                                    node.setAttribute("cx", cx);
                                    node.setAttribute("cy", cy);
                                    this._fillChangeHandler();
                                    this._strokeChangeHandler();
                                    this._updateTransform();
                                }
                             });
                            
                            SVGCircle.ATTRS = Y.merge(Y.SVGShape.ATTRS, {
                            	/**
                            	 * Indicates the width of the shape
                            	 *
                            	 * @config width
                            	 * @type Number
                            	 */
                                width: {
                                    setter: function(val)
                                    {
                                        this.set("radius", val/2);
                                        return val;
                                    },
                            
                                    getter: function()
                                    {
                                        return this.get("radius") * 2;
                                    }
                                },
                            
                            	/**
                            	 * Indicates the height of the shape
                            	 *
                            	 * @config height
                            	 * @type Number
                            	 */
                                height: {
                                    setter: function(val)
                                    {
                                        this.set("radius", val/2);
                                        return val;
                                    },
                            
                                    getter: function()
                                    {
                                        return this.get("radius") * 2;
                                    }
                                },
                            
                                /**
                                 * Radius of the circle
                                 *
                                 * @config radius
                                 * @type Number
                                 */
                                radius: {
                                    value: 0
                                }
                            });
                            Y.SVGCircle = SVGCircle;