/**
 * <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(cfg)
 {
    SVGCircle.superclass.constructor.apply(this, arguments);
 };
    
 SVGCircle.NAME = "svgCircle";

 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;