#

API Docs for: 3.10.3
Show: Inherited Protected Private Deprecated

# File: graphics/js/SVGDrawing.js

    var IMPLEMENTATION = "svg",
        SHAPE = "shape",
    	SPLITPATHPATTERN = /[a-z][^a-z]*/ig,
        SPLITARGSPATTERN = /[\-]?[0-9]*[0-9|\.][0-9]*/g,
        Y_LANG = Y.Lang,
    	AttributeLite = Y.AttributeLite,
    	SVGGraphic,
        SVGShape,
    	SVGCircle,
    	SVGRect,
    	SVGPath,
    	SVGEllipse,
        SVGPieSlice,
        DOCUMENT = Y.config.doc,
        _getClassName = Y.ClassNameManager.getClassName;

    function SVGDrawing(){}

    /**
     * <a href="http://www.w3.org/TR/SVG/">SVG</a> implementation of the <a href="Drawing.html">`Drawing`</a> class.
     * `SVGDrawing` is not intended to be used directly. Instead, use the <a href="Drawing.html">`Drawing`</a> class.
     * If the browser has <a href="http://www.w3.org/TR/SVG/">SVG</a> capabilities, the <a href="Drawing.html">`Drawing`</a>
     * class will point to the `SVGDrawing` class.
     *
     * @module graphics
     * @class SVGDrawing
     * @constructor
     */
    SVGDrawing.prototype = {
        /**
         * Rounds a value to the nearest hundredth.
         *
         * @method _round
         * @param {Number} val Value to be rounded.
         * @return Number
         * @private
         */
        _round: function(val) {
            return Math.round(val * 100)/100;
        },

        /**
         * Maps path to methods
         *
         * @property _pathSymbolToMethod
         * @type Object
         * @private
         */
        _pathSymbolToMethod: {
            M: "moveTo",
            m: "relativeMoveTo",
            L: "lineTo",
            l: "relativeLineTo",
            C: "curveTo",
            c: "relativeCurveTo",
            Q: "quadraticCurveTo",
            q: "relativeQuadraticCurveTo",
            z: "closePath",
            Z: "closePath"
        },

        /**
         * Current x position of the drawing.
         *
         * @property _currentX
         * @type Number
         * @private
         */
        _currentX: 0,

        /**
         * Current y position of the drqwing.
         *
         * @property _currentY
         * @type Number
         * @private
         */
        _currentY: 0,

        /**
         * Indicates the type of shape
         *
         * @private
         * @property _type
         * @readOnly
         * @type String
         */
        _type: "path",

        /**
         * Draws a bezier curve.
         *
         * @method curveTo
         * @param {Number} cp1x x-coordinate for the first control point.
         * @param {Number} cp1y y-coordinate for the first control point.
         * @param {Number} cp2x x-coordinate for the second control point.
         * @param {Number} cp2y y-coordinate for the second control point.
         * @param {Number} x x-coordinate for the end point.
         * @param {Number} y y-coordinate for the end point.
         * @chainable
         */
        curveTo: function() {
            this._curveTo.apply(this, [Y.Array(arguments), false]);
            return this;
        },

        /**
         * Draws a bezier curve relative to the current coordinates.
         *
         * @method relativeCurveTo
         * @param {Number} cp1x x-coordinate for the first control point.
         * @param {Number} cp1y y-coordinate for the first control point.
         * @param {Number} cp2x x-coordinate for the second control point.
         * @param {Number} cp2y y-coordinate for the second control point.
         * @param {Number} x x-coordinate for the end point.
         * @param {Number} y y-coordinate for the end point.
         * @chainable
         */
        relativeCurveTo: function() {
            this._curveTo.apply(this, [Y.Array(arguments), true]);
            return this;
        },

        /**
         * Implements curveTo methods.
         *
         * @method _curveTo
         * @param {Array} args The arguments to be used.
         * @param {Boolean} relative Indicates whether or not to use relative coordinates.
         * @private
         */
        _curveTo: function(args, relative) {
            var w,
                h,
                pts,
                cp1x,
                cp1y,
                cp2x,
                cp2y,
                x,
                y,
                right,
                left,
                bottom,
                top,
                i,
                len,
                pathArrayLen,
                currentArray,
                command = relative ? "c" : "C",
                relativeX = relative ? parseFloat(this._currentX) : 0,
                relativeY = relative ? parseFloat(this._currentY) : 0;
            this._pathArray = this._pathArray || [];
            if(this._pathType !== command)
            {
                this._pathType = command;
                currentArray = [command];
                this._pathArray.push(currentArray);
            }
            else
            {
                currentArray = this._pathArray[Math.max(0, this._pathArray.length - 1)];
                if(!currentArray)
                {
                    currentArray = [];
                    this._pathArray.push(currentArray);
                }
            }
            pathArrayLen = this._pathArray.length - 1;
            this._pathArray[pathArrayLen] = this._pathArray[pathArrayLen].concat(args);
            len = args.length - 5;
            for(i = 0; i < len; i = i + 6)
            {
                cp1x = parseFloat(args[i]) + relativeX;
                cp1y = parseFloat(args[i + 1]) + relativeY;
                cp2x = parseFloat(args[i + 2]) + relativeX;
                cp2y = parseFloat(args[i + 3]) + relativeY;
                x = parseFloat(args[i + 4]) + relativeX;
                y = parseFloat(args[i + 5]) + relativeY;
                right = Math.max(x, Math.max(cp1x, cp2x));
                bottom = Math.max(y, Math.max(cp1y, cp2y));
                left = Math.min(x, Math.min(cp1x, cp2x));
                top = Math.min(y, Math.min(cp1y, cp2y));
                w = Math.abs(right - left);
                h = Math.abs(bottom - top);
                pts = [[this._currentX, this._currentY] , [cp1x, cp1y], [cp2x, cp2y], [x, y]];
                this._setCurveBoundingBox(pts, w, h);
                this._currentX = x;
                this._currentY = y;
            }
        },

        /**
         * Draws a quadratic bezier curve.
         *
         * @method quadraticCurveTo
         * @param {Number} cpx x-coordinate for the control point.
         * @param {Number} cpy y-coordinate for the control point.
         * @param {Number} x x-coordinate for the end point.
         * @param {Number} y y-coordinate for the end point.
         * @chainable
         */
        quadraticCurveTo: function() {
            this._quadraticCurveTo.apply(this, [Y.Array(arguments), false]);
            return this;
        },

        /**
         * Draws a quadratic bezier curve relative to the current position.
         *
         * @method quadraticCurveTo
         * @param {Number} cpx x-coordinate for the control point.
         * @param {Number} cpy y-coordinate for the control point.
         * @param {Number} x x-coordinate for the end point.
         * @param {Number} y y-coordinate for the end point.
         * @chainable
         */
        relativeQuadraticCurveTo: function() {
            this._quadraticCurveTo.apply(this, [Y.Array(arguments), true]);
            return this;
        },

        /**
         * Implements quadraticCurveTo methods.
         *
         * @method _quadraticCurveTo
         * @param {Array} args The arguments to be used.
         * @param {Boolean} relative Indicates whether or not to use relative coordinates.
         * @private
         */
        _quadraticCurveTo: function(args, relative) {
            var cpx,
                cpy,
                x,
                y,
                pathArrayLen,
                currentArray,
                w,
                h,
                pts,
                right,
                left,
                bottom,
                top,
                i,
                len,
                command = relative ? "q" : "Q",
                relativeX = relative ? parseFloat(this._currentX) : 0,
                relativeY = relative ? parseFloat(this._currentY) : 0;
            this._pathArray = this._pathArray || [];
            if(this._pathType !== command)
            {
                this._pathType = command;
                currentArray = [command];
                this._pathArray.push(currentArray);
            }
            else
            {
                currentArray = this._pathArray[Math.max(0, this._pathArray.length - 1)];
                if(!currentArray)
                {
                    currentArray = [];
                    this._pathArray.push(currentArray);
                }
            }
            pathArrayLen = this._pathArray.length - 1;
            this._pathArray[pathArrayLen] = this._pathArray[pathArrayLen].concat(args);
            len = args.length - 3;
            for(i = 0; i < len; i = i + 4)
            {
                cpx = parseFloat(args[i]) + relativeX;
                cpy = parseFloat(args[i + 1]) + relativeY;
                x = parseFloat(args[i + 2]) + relativeX;
                y = parseFloat(args[i + 3]) + relativeY;
                right = Math.max(x, cpx);
                bottom = Math.max(y, cpy);
                left = Math.min(x, cpx);
                top = Math.min(y, cpy);
                w = Math.abs(right - left);
                h = Math.abs(bottom - top);
                pts = [[this._currentX, this._currentY] , [cpx, cpy], [x, y]];
                this._setCurveBoundingBox(pts, w, h);
                this._currentX = x;
                this._currentY = y;
            }
        },

        /**
         * Draws a rectangle.
         *
         * @method drawRect
         * @param {Number} x x-coordinate
         * @param {Number} y y-coordinate
         * @param {Number} w width
         * @param {Number} h height
         * @chainable
         */
        drawRect: function(x, y, w, h) {
            this.moveTo(x, y);
            this.lineTo(x + w, y);
            this.lineTo(x + w, y + h);
            this.lineTo(x, y + h);
            this.lineTo(x, y);
            return this;
        },

        /**
         * Draws a rectangle with rounded corners.
         *
         * @method drawRoundRect
         * @param {Number} x x-coordinate
         * @param {Number} y y-coordinate
         * @param {Number} w width
         * @param {Number} h height
         * @param {Number} ew width of the ellipse used to draw the rounded corners
         * @param {Number} eh height of the ellipse used to draw the rounded corners
         * @chainable
         */
        drawRoundRect: function(x, y, w, h, ew, eh) {
            this.moveTo(x, y + eh);
            this.lineTo(x, y + h - eh);
            this.quadraticCurveTo(x, y + h, x + ew, y + h);
            this.lineTo(x + w - ew, y + h);
            this.quadraticCurveTo(x + w, y + h, x + w, y + h - eh);
            this.lineTo(x + w, y + eh);
            this.quadraticCurveTo(x + w, y, x + w - ew, y);
            this.lineTo(x + ew, y);
            this.quadraticCurveTo(x, y, x, y + eh);
            return this;
    	},

        /**
         * Draws a circle.
         *
         * @method drawCircle
         * @param {Number} x y-coordinate
         * @param {Number} y x-coordinate
         * @param {Number} r radius
         * @chainable
         * @protected
         */
    	drawCircle: function(x, y, radius) {
            var circum = radius * 2;
            this._drawingComplete = false;
            this._trackSize(x, y);
            this._trackSize(x + circum, y + circum);
            this._pathArray = this._pathArray || [];
            this._pathArray.push(["M", x + radius, y]);
            this._pathArray.push(["A",  radius, radius, 0, 1, 0, x + radius, y + circum]);
            this._pathArray.push(["A",  radius, radius, 0, 1, 0, x + radius, y]);
            this._currentX = x;
            this._currentY = y;
            return this;
        },

        /**
         * Draws an ellipse.
         *
         * @method drawEllipse
         * @param {Number} x x-coordinate
         * @param {Number} y y-coordinate
         * @param {Number} w width
         * @param {Number} h height
         * @chainable
         * @protected
         */
    	drawEllipse: function(x, y, w, h) {
            var radius = w * 0.5,
                yRadius = h * 0.5;
            this._drawingComplete = false;
            this._trackSize(x, y);
            this._trackSize(x + w, y + h);
            this._pathArray = this._pathArray || [];
            this._pathArray.push(["M", x + radius, y]);
            this._pathArray.push(["A",  radius, yRadius, 0, 1, 0, x + radius, y + h]);
            this._pathArray.push(["A",  radius, yRadius, 0, 1, 0, x + radius, y]);
            this._currentX = x;
            this._currentY = y;
            return this;
        },

        /**
         * Draws a diamond.
         *
         * @method drawDiamond
         * @param {Number} x y-coordinate
         * @param {Number} y x-coordinate
         * @param {Number} width width
         * @param {Number} height height
         * @chainable
         * @protected
         */
        drawDiamond: function(x, y, width, height)
        {
            var midWidth = width * 0.5,
                midHeight = height * 0.5;
            this.moveTo(x + midWidth, y);
            this.lineTo(x + width, y + midHeight);
            this.lineTo(x + midWidth, y + height);
            this.lineTo(x, y + midHeight);
            this.lineTo(x + midWidth, y);
            return this;
        },

        /**
         * Draws a wedge.
         *
         * @method drawWedge
         * @param {Number} x x-coordinate of the wedge's center point
         * @param {Number} y y-coordinate of the wedge's center point
         * @param {Number} startAngle starting angle in degrees
         * @param {Number} arc sweep of the wedge. Negative values draw clockwise.
         * @param {Number} radius radius of wedge. If [optional] yRadius is defined, then radius is the x radius.
         * @param {Number} yRadius [optional] y radius for wedge.
         * @chainable
         * @private
         */
        drawWedge: function(x, y, startAngle, arc, radius, yRadius)
        {
            var segs,
                segAngle,
                theta,
                angle,
                angleMid,
                ax,
                ay,
                bx,
                by,
                cx,
                cy,
                i,
                diameter = radius * 2,
                currentArray,
                pathArrayLen;
            this._pathArray = this._pathArray || [];
            yRadius = yRadius || radius;
            if(this._pathType !== "M")
            {
                this._pathType = "M";
                currentArray = ["M"];
                this._pathArray.push(currentArray);
            }
            else
            {
                currentArray = this._getCurrentArray();
            }
            pathArrayLen = this._pathArray.length - 1;
            this._pathArray[pathArrayLen].push(x);
            this._pathArray[pathArrayLen].push(x);

            // limit sweep to reasonable numbers
            if(Math.abs(arc) > 360)
            {
                arc = 360;
            }

            // First we calculate how many segments are needed
            // for a smooth arc.
            segs = Math.ceil(Math.abs(arc) / 45);

            // Now calculate the sweep of each segment.
            segAngle = arc / segs;

            // The math requires radians rather than degrees. To convert from degrees
            // use the formula (degrees/180)*Math.PI to get radians.
            theta = -(segAngle / 180) * Math.PI;

            // convert angle startAngle to radians
            angle = (startAngle / 180) * Math.PI;
            if(segs > 0)
            {
                // draw a line from the center to the start of the curve
                ax = x + Math.cos(startAngle / 180 * Math.PI) * radius;
                ay = y + Math.sin(startAngle / 180 * Math.PI) * yRadius;
                this._pathType = "L";
                pathArrayLen++;
                this._pathArray[pathArrayLen] = ["L"];
                this._pathArray[pathArrayLen].push(this._round(ax));
                this._pathArray[pathArrayLen].push(this._round(ay));
                pathArrayLen++;
                this._pathType = "Q";
                this._pathArray[pathArrayLen] = ["Q"];
                for(i = 0; i < segs; ++i)
                {
                    angle += theta;
                    angleMid = angle - (theta / 2);
                    bx = x + Math.cos(angle) * radius;
                    by = y + Math.sin(angle) * yRadius;
                    cx = x + Math.cos(angleMid) * (radius / Math.cos(theta / 2));
                    cy = y + Math.sin(angleMid) * (yRadius / Math.cos(theta / 2));
                    this._pathArray[pathArrayLen].push(this._round(cx));
                    this._pathArray[pathArrayLen].push(this._round(cy));
                    this._pathArray[pathArrayLen].push(this._round(bx));
                    this._pathArray[pathArrayLen].push(this._round(by));
                }
            }
            this._currentX = x;
            this._currentY = y;
            this._trackSize(diameter, diameter);
            return this;
        },

        /**
         * Draws a line segment using the current line style from the current drawing position to the specified x and y coordinates.
         *
         * @method lineTo
         * @param {Number} point1 x-coordinate for the end point.
         * @param {Number} point2 y-coordinate for the end point.
         * @chainable
         */
        lineTo: function()
        {
            this._lineTo.apply(this, [Y.Array(arguments), false]);
            return this;
        },

        /**
         * Draws a line segment using the current line style from the current drawing position to the relative x and y coordinates.
         *
         * @method relativeLineTo
         * @param {Number} point1 x-coordinate for the end point.
         * @param {Number} point2 y-coordinate for the end point.
         * @chainable
         */
        relativeLineTo: function()
        {
            this._lineTo.apply(this, [Y.Array(arguments), true]);
            return this;
        },

        /**
         * Implements lineTo methods.
         *
         * @method _lineTo
         * @param {Array} args The arguments to be used.
         * @param {Boolean} relative Indicates whether or not to use relative coordinates.
         * @private
         */
        _lineTo: function(args, relative) {
            var point1 = args[0],
                i,
                len,
                pathArrayLen,
                currentArray,
                x,
                y,
                command = relative ? "l" : "L",
                relativeX = relative ? parseFloat(this._currentX) : 0,
                relativeY = relative ? parseFloat(this._currentY) : 0;
            this._pathArray = this._pathArray || [];
            this._shapeType = "path";
            len = args.length;
            if(this._pathType !== command)
            {
                this._pathType = command;
                currentArray = [command];
                this._pathArray.push(currentArray);
            }
            else
            {
                currentArray = this._getCurrentArray();
            }
            pathArrayLen = this._pathArray.length - 1;
            if (typeof point1 === 'string' || typeof point1 === 'number') {
                for (i = 0; i < len; i = i + 2) {
                    x = parseFloat(args[i]);
                    y = parseFloat(args[i + 1]);
                    this._pathArray[pathArrayLen].push(x);
                    this._pathArray[pathArrayLen].push(y);
                    x = x + relativeX;
                    y = y + relativeY;
                    this._currentX = x;
                    this._currentY = y;
                    this._trackSize.apply(this, [x, y]);
                }
            }
            else
            {
                for (i = 0; i < len; ++i) {
                    x = parseFloat(args[i][0]);
                    y = parseFloat(args[i][1]);
                    this._pathArray[pathArrayLen].push(x);
                    this._pathArray[pathArrayLen].push(y);
                    this._currentX = x;
                    this._currentY = y;
                    x = x + relativeX;
                    y = y + relativeY;
                    this._trackSize.apply(this, [x, y]);
                }
            }
        },

        /**
         * Moves the current drawing position to specified x and y coordinates.
         *
         * @method moveTo
         * @param {Number} x x-coordinate for the end point.
         * @param {Number} y y-coordinate for the end point.
         * @chainable
         */
        moveTo: function()
        {
            this._moveTo.apply(this, [Y.Array(arguments), false]);
            return this;
        },

        /**
         * Moves the current drawing position relative to specified x and y coordinates.
         *
         * @method relativeMoveTo
         * @param {Number} x x-coordinate for the end point.
         * @param {Number} y y-coordinate for the end point.
         * @chainable
         */
        relativeMoveTo: function()
        {
            this._moveTo.apply(this, [Y.Array(arguments), true]);
            return this;
        },

        /**
         * Implements moveTo methods.
         *
         * @method _moveTo
         * @param {Array} args The arguments to be used.
         * @param {Boolean} relative Indicates whether or not to use relative coordinates.
         * @private
         */
        _moveTo: function(args, relative) {
            var pathArrayLen,
                currentArray,
                x = parseFloat(args[0]),
                y = parseFloat(args[1]),
                command = relative ? "m" : "M",
                relativeX = relative ? parseFloat(this._currentX) : 0,
                relativeY = relative ? parseFloat(this._currentY) : 0;
            this._pathArray = this._pathArray || [];
            this._pathType = command;
            currentArray = [command];
            this._pathArray.push(currentArray);
            pathArrayLen = this._pathArray.length - 1;
            this._pathArray[pathArrayLen] = this._pathArray[pathArrayLen].concat([x, y]);
            x = x + relativeX;
            y = y + relativeY;
            this._currentX = x;
            this._currentY = y;
            this._trackSize(x, y);
        },

        /**
         * Completes a drawing operation.
         *
         * @method end
         * @chainable
         */
        end: function()
        {
            this._closePath();
            return this;
        },

        /**
         * Clears the path.
         *
         * @method clear
         * @chainable
         */
        clear: function()
        {
            this._currentX = 0;
            this._currentY = 0;
            this._width = 0;
            this._height = 0;
            this._left = 0;
            this._right = 0;
            this._top = 0;
            this._bottom = 0;
            this._pathArray = [];
            this._path = "";
            this._pathType = "";
            return this;
        },

        /**
         * Draws the path.
         *
         * @method _closePath
         * @private
         */
        _closePath: function()
        {
            var pathArray,
                segmentArray,
                pathType,
                len,
                val,
                i,
                path = "",
                node = this.node,
                left = parseFloat(this._left),
                top = parseFloat(this._top),
                fill = this.get("fill");
            if(this._pathArray)
            {
                pathArray = this._pathArray.concat();
                while(pathArray && pathArray.length > 0)
                {
                    segmentArray = pathArray.shift();
                    len = segmentArray.length;
                    pathType = segmentArray[0];
                    if(pathType === "A")
                    {
                        path += pathType + segmentArray[1] + "," + segmentArray[2];
                    }
                    else if(pathType === "z" || pathType === "Z")
                    {
                        path += " z ";
                    }
                    else if(pathType === "C" || pathType === "c")
                    {
                        path += pathType + (segmentArray[1] - left)+ "," + (segmentArray[2] - top);
                    }
                    else
                    {
                        path += " " + pathType + parseFloat(segmentArray[1] - left);
                    }
                    switch(pathType)
                    {
                        case "L" :
                        case "l" :
                        case "M" :
                        case "m" :
                        case "Q" :
                        case "q" :
                            for(i = 2; i < len; ++i)
                            {
                                val = (i % 2 === 0) ? top : left;
                                val = segmentArray[i] - val;
                                path += ", " + parseFloat(val);
                            }
                        break;
                        case "A" :
                            val = " " + parseFloat(segmentArray[3]) + " " + parseFloat(segmentArray[4]);
                            val += "," + parseFloat(segmentArray[5]) + " " + parseFloat(segmentArray[6] - left);
                            val += "," + parseFloat(segmentArray[7] - top);
                            path += " " + val;
                        break;
                        case "C" :
                        case "c" :
                            for(i = 3; i < len - 1; i = i + 2)
                            {
                                val = parseFloat(segmentArray[i] - left);
                                val = val + ", ";
                                val = val + parseFloat(segmentArray[i + 1] - top);
                                path += " " + val;
                            }
                        break;
                    }
                }
                if(fill && fill.color)
                {
                    path += 'z';
                }
                Y.Lang.trim(path);
                if(path)
                {
                    node.setAttribute("d", path);
                }

                this._path = path;
                this._fillChangeHandler();
                this._strokeChangeHandler();
                this._updateTransform();
            }
        },

        /**
         * Ends a fill and stroke
         *
         * @method closePath
         * @chainable
         */
        closePath: function()
        {
            this._pathArray.push(["z"]);
            return this;
        },

        /**
         * Returns the current array of drawing commands.
         *
         * @method _getCurrentArray
         * @return Array
         * @private
         */
        _getCurrentArray: function()
        {
            var currentArray = this._pathArray[Math.max(0, this._pathArray.length - 1)];
            if(!currentArray)
            {
                currentArray = [];
                this._pathArray.push(currentArray);
            }
            return currentArray;
        },

        /**
         * Returns the points on a curve
         *
         * @method getBezierData
         * @param Array points Array containing the begin, end and control points of a curve.
         * @param Number t The value for incrementing the next set of points.
         * @return Array
         * @private
         */
        getBezierData: function(points, t) {
            var n = points.length,
                tmp = [],
                i,
                j;

            for (i = 0; i < n; ++i){
                tmp[i] = [points[i][0], points[i][1]]; // save input
            }

            for (j = 1; j < n; ++j) {
                for (i = 0; i < n - j; ++i) {
                    tmp[i][0] = (1 - t) * tmp[i][0] + t * tmp[parseInt(i + 1, 10)][0];
                    tmp[i][1] = (1 - t) * tmp[i][1] + t * tmp[parseInt(i + 1, 10)][1];
                }
            }
            return [ tmp[0][0], tmp[0][1] ];
        },

        /**
         * Calculates the bounding box for a curve
         *
         * @method _setCurveBoundingBox
         * @param Array pts Array containing points for start, end and control points of a curve.
         * @param Number w Width used to calculate the number of points to describe the curve.
         * @param Number h Height used to calculate the number of points to describe the curve.
         * @private
         */
        _setCurveBoundingBox: function(pts, w, h)
        {
            var i,
                left = this._currentX,
                right = left,
                top = this._currentY,
                bottom = top,
                len = Math.round(Math.sqrt((w * w) + (h * h))),
                t = 1/len,
                xy;
            for(i = 0; i < len; ++i)
            {
                xy = this.getBezierData(pts, t * i);
                left = isNaN(left) ? xy[0] : Math.min(xy[0], left);
                right = isNaN(right) ? xy[0] : Math.max(xy[0], right);
                top = isNaN(top) ? xy[1] : Math.min(xy[1], top);
                bottom = isNaN(bottom) ? xy[1] : Math.max(xy[1], bottom);
            }
            left = Math.round(left * 10)/10;
            right = Math.round(right * 10)/10;
            top = Math.round(top * 10)/10;
            bottom = Math.round(bottom * 10)/10;
            this._trackSize(right, bottom);
            this._trackSize(left, top);
        },

        /**
         * Updates the size of the graphics object
         *
         * @method _trackSize
         * @param {Number} w width
         * @param {Number} h height
         * @private
         */
        _trackSize: function(w, h) {
            if (w > this._right) {
                this._right = w;
            }
            if(w < this._left)
            {
                this._left = w;
            }
            if (h < this._top)
            {
                this._top = h;
            }
            if (h > this._bottom)
            {
                this._bottom = h;
            }
            this._width = this._right - this._left;
            this._height = this._bottom - this._top;
        }
    };
    Y.SVGDrawing = SVGDrawing;