    /**
     * @private
     */
    Ext.define('Ext.chart.Shape', {

        /* Begin Definitions */

        singleton: true,

        /* End Definitions */

        circle: function (surface, opts) {
            return surface.add(Ext.apply({
                type: 'circle',
                x: opts.x,
                y: opts.y,
                stroke: null,
                radius: opts.radius
            }, opts));
        },
        line: function (surface, opts) {
            return surface.add(Ext.apply({
                type: 'rect',
                x: opts.x - opts.radius,
                y: opts.y - opts.radius,
                height: 2 * opts.radius,
                width: 2 * opts.radius / 5
            }, opts));
        },
        square: function (surface, opts) {
            return surface.add(Ext.applyIf({
                type: 'rect',
                x: opts.x - opts.radius,
                y: opts.y - opts.radius,
                height: 2 * opts.radius,
                width: 2 * opts.radius,
                radius: null
            }, opts));
        },
        triangle: function (surface, opts) {
            opts.radius *= 1.75;
            return surface.add(Ext.apply({
                type: 'path',
                stroke: null,
                path: "M".concat(opts.x, ",", opts.y, "m0-", opts.radius * 0.58, "l", opts.radius * 0.5, ",", opts.radius * 0.87, "-", opts.radius, ",0z")
            }, opts));
        },
        diamond: function (surface, opts) {
            var r = opts.radius;
            r *= 1.5;
            return surface.add(Ext.apply({
                type: 'path',
                stroke: null,
                path: ["M", opts.x, opts.y - r, "l", r, r, -r, r, -r, -r, r, -r, "z"]
            }, opts));
        },
        cross: function (surface, opts) {
            var r = opts.radius;
            r = r / 1.7;
            return surface.add(Ext.apply({
                type: 'path',
                stroke: null,
                path: "M".concat(opts.x - r, ",", opts.y, "l", [-r, -r, r, -r, r, r, r, -r, r, r, -r, r, r, r, -r, r, -r, -r, -r, r, -r, -r, "z"])
            }, opts));
        },
        plus: function (surface, opts) {
            var r = opts.radius / 1.3;
            return surface.add(Ext.apply({
                type: 'path',
                stroke: null,
                path: "M".concat(opts.x - r / 2, ",", opts.y - r / 2, "l", [0, -r, r, 0, 0, r, r, 0, 0, r, -r, 0, 0, r, -r, 0, 0, -r, -r, 0, 0, -r, "z"])
            }, opts));
        },
        arrow: function (surface, opts) {
            var r = opts.radius;
            return surface.add(Ext.apply({
                type: 'path',
                path: "M".concat(opts.x - r * 0.7, ",", opts.y - r * 0.4, "l", [r * 0.6, 0, 0, -r * 0.4, r, r * 0.8, -r, r * 0.8, 0, -r * 0.4, -r * 0.6, 0], "z")
            }, opts));
        },
        drop: function (surface, x, y, text, size, angle) {
            size = size || 30;
            angle = angle || 0;
            surface.add({
                type: 'path',
                path: ['M', x, y, 'l', size, 0, 'A', size * 0.4, size * 0.4, 0, 1, 0, x + size * 0.7, y - size * 0.7, 'z'],
                fill: '#000',
                stroke: 'none',
                rotate: {
                    degrees: 22.5 - angle,
                    x: x,
                    y: y
                }
            });
            angle = (angle + 90) * Math.PI / 180;
            surface.add({
                type: 'text',
                x: x + size * Math.sin(angle) - 10, // Shift here, Not sure why.
                y: y + size * Math.cos(angle) + 5,
                text:  text,
                'font-size': size * 12 / 40,
                stroke: 'none',
                fill: '#fff'
            });
        }
    });