TrainSignManage/WebFrame/bower_components/jquery-sparkline/src/vcanvas-base.js

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    // Setup a very simple "virtual canvas" to make drawing the few shapes we need easier
    // This is accessible as $(foo).simpledraw()

    VShape = createClass({
        init: function (target, id, type, args) {
            this.target = target;
            this.id = id;
            this.type = type;
            this.args = args;
        },
        append: function () {
            this.target.appendShape(this);
            return this;
        }
    });

    VCanvas_base = createClass({
        _pxregex: /(\d+)(px)?\s*$/i,

        init: function (width, height, target) {
            if (!width) {
                return;
            }
            this.width = width;
            this.height = height;
            this.target = target;
            this.lastShapeId = null;
            if (target[0]) {
                target = target[0];
            }
            $.data(target, '_jqs_vcanvas', this);
        },

        drawLine: function (x1, y1, x2, y2, lineColor, lineWidth) {
            return this.drawShape([[x1, y1], [x2, y2]], lineColor, lineWidth);
        },

        drawShape: function (path, lineColor, fillColor, lineWidth) {
            return this._genShape('Shape', [path, lineColor, fillColor, lineWidth]);
        },

        drawCircle: function (x, y, radius, lineColor, fillColor, lineWidth) {
            return this._genShape('Circle', [x, y, radius, lineColor, fillColor, lineWidth]);
        },

        drawPieSlice: function (x, y, radius, startAngle, endAngle, lineColor, fillColor) {
            return this._genShape('PieSlice', [x, y, radius, startAngle, endAngle, lineColor, fillColor]);
        },

        drawRect: function (x, y, width, height, lineColor, fillColor) {
            return this._genShape('Rect', [x, y, width, height, lineColor, fillColor]);
        },

        getElement: function () {
            return this.canvas;
        },

        /**
         * Return the most recently inserted shape id
         */