/**
                             * <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> implementation of the <a href="Circle.html">`Circle`</a> class.
                             * `CanvasCircle` is not intended to be used directly. Instead, use the <a href="Circle.html">`Circle`</a> class.
                             * If the browser lacks <a href="http://www.w3.org/TR/SVG/">SVG</a> capabilities but has
                             * <a href="http://www.w3.org/TR/html5/the-canvas-element.html">Canvas</a> capabilities, the <a href="Circle.html">`Circle`</a>
                             * class will point to the `CanvasCircle` class.
                             *
                             * @module graphics
                             * @class CanvasCircle
                             * @constructor
                             */
                            CanvasCircle = function()
                            {
                            	CanvasCircle.superclass.constructor.apply(this, arguments);
                            };
                            
                            CanvasCircle.NAME = "circle";
                            
                            Y.extend(CanvasCircle, Y.CanvasShape, {
                            	/**
                            	 * Indicates the type of shape
                            	 *
                            	 * @property _type
                            	 * @type String
                                 * @private
                            	 */
                            	_type: "circle",
                            
                            	/**
                                 * Draws the shape.
                                 *
                                 * @method _draw
                            	 * @private
                            	 */
                            	_draw: function()
                            	{
                            		var radius = this.get("radius");
                            		if(radius)
                            		{
                                        this.clear();
                                        this.drawCircle(0, 0, radius);
                            			this._closePath();
                            		}
                            	}
                            });
                            
                            CanvasCircle.ATTRS = Y.merge(Y.CanvasShape.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: {
                            		lazyAdd: false
                            	}
                            });
                            Y.CanvasCircle = CanvasCircle;