jquery.flot.js

/* Plugin for jQuery for working with colors.
 *
 * Version 1.1.
 *
 * Inspiration from jQuery color animation plugin by John Resig.
 *
 * Released under the MIT license by Ole Laursen, October 2009.
 *
 * Examples:
 *
 *   $.color.parse("#fff").scale('rgb', 0.25).add('a', -0.5).toString()
 *   var c = $.color.extract($("#mydiv"), 'background-color');
 *   console.log(c.r, c.g, c.b, c.a);
 *   $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)"
 *
 * Note that .scale() and .add() return the same modified object
 * instead of making a new one.
 *
 * V. 1.1: Fix error handling so e.g. parsing an empty string does
 * produce a color rather than just crashing.
 */

(function($) {
    $.color = {};

    // construct color object with some convenient chainable helpers
    $.color.make = function (r, g, b, a) {
        var o = {};
        o.r = r || 0;
        o.g = g || 0;
        o.b = b || 0;
        o.a = a != null ? a : 1;

        o.add = function (c, d) {
            for (var i = 0; i < c.length; ++i) {
                o[c.charAt(i)] += d;
            }

            return o.normalize();
        };

        o.scale = function (c, f) {
            for (var i = 0; i < c.length; ++i) {
                o[c.charAt(i)] *= f;
            }

            return o.normalize();
        };

        o.toString = function () {
            if (o.a >= 1.0) {
                return "rgb(" + [o.r, o.g, o.b].join(",") + ")";
            } else {
                return "rgba(" + [o.r, o.g, o.b, o.a].join(",") + ")";
            }
        };

        o.normalize = function () {
            function clamp(min, value, max) {
                return value < min ? min : (value > max ? max : value);
            }

            o.r = clamp(0, parseInt(o.r), 255);
            o.g = clamp(0, parseInt(o.g), 255);
            o.b = clamp(0, parseInt(o.b), 255);
            o.a = clamp(0, o.a, 1);
            return o;
        };

        o.clone = function () {
            return $.color.make(o.r, o.b, o.g, o.a);
        };

        return o.normalize();
    }

    // extract CSS color property from element, going up in the DOM
    // if it's "transparent"
    $.color.extract = function (elem, css) {
        var c;

        do {
            c = elem.css(css).toLowerCase();
            // keep going until we find an element that has color, or
            // we hit the body or root (have no parent)
            if (c !== '' && c !== 'transparent') {
                break;
            }

            elem = elem.parent();
        } while (elem.length && !$.nodeName(elem.get(0), "body"));

        // catch Safari's way of signalling transparent
        if (c === "rgba(0, 0, 0, 0)") {
            c = "transparent";
        }

        return $.color.parse(c);
    }

    // parse CSS color string (like "rgb(10, 32, 43)" or "#fff"),
    // returns color object, if parsing failed, you get black (0, 0,
    // 0) out
    $.color.parse = function (str) {
        var res, m = $.color.make;

        // Look for rgb(num,num,num)
        res = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(str);
        if (res) {
            return m(parseInt(res[1], 10), parseInt(res[2], 10), parseInt(res[3], 10));
        }

        // Look for rgba(num,num,num,num)
        res = /rgba\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(str)
        if (res) {
            return m(parseInt(res[1], 10), parseInt(res[2], 10), parseInt(res[3], 10), parseFloat(res[4]));
        }

        // Look for rgb(num%,num%,num%)
        res = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)%\s*,\s*([0-9]+(?:\.[0-9]+)?)%\s*,\s*([0-9]+(?:\.[0-9]+)?)%\s*\)/.exec(str);
        if (res) {
            return m(parseFloat(res[1]) * 2.55, parseFloat(res[2]) * 2.55, parseFloat(res[3]) * 2.55);
        }

        // Look for rgba(num%,num%,num%,num)
        res = /rgba\(\s*([0-9]+(?:\.[0-9]+)?)%\s*,\s*([0-9]+(?:\.[0-9]+)?)%\s*,\s*([0-9]+(?:\.[0-9]+)?)%\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(str);
        if (res) {
            return m(parseFloat(res[1]) * 2.55, parseFloat(res[2]) * 2.55, parseFloat(res[3]) * 2.55, parseFloat(res[4]));
        }

        // Look for #a0b1c2
        res = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(str);
        if (res) {
            return m(parseInt(res[1], 16), parseInt(res[2], 16), parseInt(res[3], 16));
        }

        // Look for #fff
        res = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(str);
        if (res) {
            return m(parseInt(res[1] + res[1], 16), parseInt(res[2] + res[2], 16), parseInt(res[3] + res[3], 16));
        }

        // Otherwise, we're most likely dealing with a named color
        var name = $.trim(str).toLowerCase();
        if (name === "transparent") {
            return m(255, 255, 255, 0);
        } else {
            // default to black
            res = lookupColors[name] || [0, 0, 0];
            return m(res[0], res[1], res[2]);
        }
    }

    var lookupColors = {
        aqua: [0, 255, 255],
        azure: [240, 255, 255],
        beige: [245, 245, 220],
        black: [0, 0, 0],
        blue: [0, 0, 255],
        brown: [165, 42, 42],
        cyan: [0, 255, 255],
        darkblue: [0, 0, 139],
        darkcyan: [0, 139, 139],
        darkgrey: [169, 169, 169],
        darkgreen: [0, 100, 0],
        darkkhaki: [189, 183, 107],
        darkmagenta: [139, 0, 139],
        darkolivegreen: [85, 107, 47],
        darkorange: [255, 140, 0],
        darkorchid: [153, 50, 204],
        darkred: [139, 0, 0],
        darksalmon: [233, 150, 122],
        darkviolet: [148, 0, 211],
        fuchsia: [255, 0, 255],
        gold: [255, 215, 0],
        green: [0, 128, 0],
        indigo: [75, 0, 130],
        khaki: [240, 230, 140],
        lightblue: [173, 216, 230],
        lightcyan: [224, 255, 255],
        lightgreen: [144, 238, 144],
        lightgrey: [211, 211, 211],
        lightpink: [255, 182, 193],
        lightyellow: [255, 255, 224],
        lime: [0, 255, 0],
        magenta: [255, 0, 255],
        maroon: [128, 0, 0],
        navy: [0, 0, 128],
        olive: [128, 128, 0],
        orange: [255, 165, 0],
        pink: [255, 192, 203],
        purple: [128, 0, 128],
        violet: [128, 0, 128],
        red: [255, 0, 0],
        silver: [192, 192, 192],
        white: [255, 255, 255],
        yellow: [255, 255, 0]
    };
})(jQuery);

///////////////////////////////////////////////////////////////////////////
// The Canvas object is a wrapper around an HTML5 <canvas> tag.
//
// @constructor
// @param {string} cls List of classes to apply to the canvas.
// @param {element} container Element onto which to append the canvas.
//
// Requiring a container is a little iffy, but unfortunately canvas
// operations don't work unless the canvas is attached to the DOM.

(function() {
    var Canvas = function(cls, container) {
        var element = container.getElementsByClassName(cls)[0];

        if (!element) {
            element = document.createElement('canvas');
            element.className = cls;
            element.style.direction = 'ltr';
            element.style.position = 'absolute';
            element.style.left = '0px';
            element.style.top = '0px';

            container.appendChild(element);

            // If HTML5 Canvas isn't available, throw

            if (!element.getContext) {
                throw new Error('Canvas is not available.');
            }
        }

        this.element = element;

        var context = this.context = element.getContext('2d');

        // Determine the screen's ratio of physical to device-independent
        // pixels.  This is the ratio between the canvas width that the browser
        // advertises and the number of pixels actually present in that space.

        // The iPhone 4, for example, has a device-independent width of 320px,
        // but its screen is actually 640px wide.  It therefore has a pixel
        // ratio of 2, while most normal devices have a ratio of 1.

        var devicePixelRatio = window.devicePixelRatio || 1,
            backingStoreRatio =
            context.webkitBackingStorePixelRatio ||
            context.mozBackingStorePixelRatio ||
            context.msBackingStorePixelRatio ||
            context.oBackingStorePixelRatio ||
            context.backingStorePixelRatio || 1;

        this.pixelRatio = devicePixelRatio / backingStoreRatio;

        // Size the canvas to match the internal dimensions of its container

        var box = container.getBoundingClientRect();
        this.resize(box.width, box.height);

        // Collection of HTML div layers for text overlaid onto the canvas

        this.textContainer = null;
        this.SVGContainer = null;
        this.text = {};
        this.SVG = {};

        // Cache of text fragments and metrics, so we can avoid expensively
        // re-calculating them when the plot is re-rendered in a loop.

        this._textCache = {};
    }

    // Resizes the canvas to the given dimensions.
    //
    // @param {number} width New width of the canvas, in pixels.
    // @param {number} width New height of the canvas, in pixels.

    Canvas.prototype.resize = function(width, height) {
        var minSize = 10;
        width = width < minSize ? minSize : width;
        height = height < minSize ? minSize : height;

        var element = this.element,
            context = this.context,
            pixelRatio = this.pixelRatio;

        // Resize the canvas, increasing its density based on the display's
        // pixel ratio; basically giving it more pixels without increasing the
        // size of its element, to take advantage of the fact that retina
        // displays have that many more pixels in the same advertised space.

        // Resizing should reset the state (excanvas seems to be buggy though)

        if (this.width !== width) {
            element.width = width * pixelRatio;
            element.style.width = width + 'px';
            this.width = width;
        }

        if (this.height !== height) {
            element.height = height * pixelRatio;
            element.style.height = height + 'px';
            this.height = height;
        }

        // Save the context, so we can reset in case we get replotted.  The
        // restore ensure that we're really back at the initial state, and
        // should be safe even if we haven't saved the initial state yet.

        context.restore();
        context.save();

        // Scale the coordinate space to match the display density; so even though we
        // may have twice as many pixels, we still want lines and other drawing to
        // appear at the same size; the extra pixels will just make them crisper.

        context.scale(pixelRatio, pixelRatio);
    };

    // Clears the entire canvas area, not including any overlaid HTML text

    Canvas.prototype.clear = function() {
        this.context.clearRect(0, 0, this.width, this.height);
    };

    // Finishes rendering the canvas, including managing the text overlay.

    Canvas.prototype.render = function() {
        var cache = this._textCache;

        // For each text layer, add elements marked as active that haven't
        // already been rendered, and remove those that are no longer active.

        for (var layerKey in cache) {
            if (hasOwnProperty.call(cache, layerKey)) {
                var layer = this.getTextLayer(layerKey),
                    layerCache = cache[layerKey];

                var display = layer.style.display;
                layer.style.display = 'none';

                for (var styleKey in layerCache) {
                    if (hasOwnProperty.call(layerCache, styleKey)) {
                        var styleCache = layerCache[styleKey];
                        for (var key in styleCache) {
                            if (hasOwnProperty.call(styleCache, key)) {
                                var val = styleCache[key],
                                    positions = val.positions;

                                for (var i = 0, position; positions[i]; i++) {
                                    position = positions[i];
                                    if (position.active) {
                                        if (!position.rendered) {
                                            layer.appendChild(position.element);
                                            position.rendered = true;
                                        }
                                    } else {
                                        positions.splice(i--, 1);
                                        if (position.rendered) {
                                            position.element.parentNode.removeChild(position.element);
                                        }
                                    }
                                }

                                if (positions.length === 0) {
                                    if (val.measured) {
                                        val.measured = false;
                                    } else {
                                        delete styleCache[key];
                                    }
                                }
                            }
                        }
                    }
                }

                layer.style.display = display;
            }
        }
    };

    // Creates (if necessary) and returns the text overlay container.
    //
    // @param {string} classes String of space-separated CSS classes used to
    //     uniquely identify the text layer.
    // @return {object} The text-layer div.

    Canvas.prototype.getTextLayer = function(classes) {
        var layer = this.text[classes];

        // Create the text layer if it doesn't exist

        if (!layer) {
            // Create the text layer container, if it doesn't exist
            if (!this.textContainer) {
                this.textContainer = document.createElement('div');
                this.textContainer.className = 'flot-text';
                this.textContainer.style.position = 'absolute';
                this.textContainer.style.top = '0px';
                this.textContainer.style.left = '0px';
                this.textContainer.style.bottom = '0px';
                this.textContainer.style.right = '0px';
                this.textContainer.style.color = 'inherit';
                this.element.parentNode.insertBefore(this.textContainer, this.element);
            }

            layer = document.createElement('div');
            layer.className = classes;
            layer.style.position = 'absolute';
            layer.style.top = '0px';
            layer.style.left = '0px';
            layer.style.bottom = '0px';
            layer.style.right = '0px';
            this.textContainer.appendChild(layer);
            this.text[classes] = layer;
        }

        return layer;
    };

    // Creates (if necessary) and returns the SVG overlay container.
    //
    // @param {string} classes String of space-separated CSS classes used to
    //     uniquely identify the text layer.
    // @return {object} The text-layer div.

    Canvas.prototype.getSVGLayer = function(classes) {
        var layer = this.SVG[classes];

        // Create the SVG layer if it doesn't exist

        if (!layer) {
            // Create the text layer container, if it doesn't exist

            var svgElement;

            if (!this.SVGContainer) {
                this.SVGContainer = document.createElement('div');
                this.SVGContainer.className = 'flot-svg';
                this.SVGContainer.style.position = 'absolute';
                this.SVGContainer.style.top = '0px';
                this.SVGContainer.style.left = '0px';
                this.SVGContainer.style.bottom = '0px';
                this.SVGContainer.style.right = '0px';
                this.SVGContainer.style.pointerEvents = 'none';
                this.element.parentNode.insertAfter(this.SVGContainer, this.element);

                svgElement = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
                svgElement.style.width = '100%';
                svgElement.style.height = '100%';
                this.SVGContainer.appendChild(svgElement);
            } else {
                svgElement = this.SVGContainer.getElementsByName('svg')[0];
            }

            layer = document.createElementNS('http://www.w3.org/2000/svg', 'g');
            layer.className = 'classes';
            layer.style.position = 'absolute';
            layer.style.top = '0px';
            layer.style.left = '0px';
            layer.style.bottom = '0px';
            layer.style.right = '0px';
            layer.style.fill = '#aaaaaa';
            svgElement.appendChild(layer, this.element);

            this.SVG[classes] = layer;
        }

        return layer;
    };

    // Creates (if necessary) and returns a text info object.
    //
    // The object looks like this:
    //
    // {
    //     width: Width of the text's wrapper div.
    //     height: Height of the text's wrapper div.
    //     element: The HTML div containing the text.
    //     positions: Array of positions at which this text is drawn.
    // }
    //
    // The positions array contains objects that look like this:
    //
    // {
    //     active: Flag indicating whether the text should be visible.
    //     rendered: Flag indicating whether the text is currently visible.
    //     element: The HTML div containing the text.
    //     text: The actual text and is identical with element[0].innerHTML.
    //     x: X coordinate at which to draw the text.
    //     y: Y coordinate at which to draw the text.
    // }
    //
    // Each position after the first receives a clone of the original element.
    //
    // The idea is that that the width, height, and general 'identity' of the
    // text is constant no matter where it is placed; the placements are a
    // secondary property.
    //
    // Canvas maintains a cache of recently-used text info objects; getTextInfo
    // either returns the cached element or creates a new entry.
    //
    // @param {string} layer A string of space-separated CSS classes uniquely
    //     identifying the layer containing this text.
    // @param {string} text Text string to retrieve info for.
    // @param {(string|object)=} font Either a string of space-separated CSS
    //     classes or a font-spec object, defining the text's font and style.
    // @param {number=} angle Angle at which to rotate the text, in degrees.
    //     Angle is currently unused, it will be implemented in the future.
    // @param {number=} width Maximum width of the text before it wraps.
    // @return {object} a text info object.

    Canvas.prototype.getTextInfo = function(layer, text, font, angle, width) {
        var textStyle, layerCache, styleCache, info;

        // Cast the value to a string, in case we were given a number or such

        text = '' + text;

        // If the font is a font-spec object, generate a CSS font definition

        if (typeof font === 'object') {
            textStyle = font.style + ' ' + font.variant + ' ' + font.weight + ' ' + font.size + 'px/' + font.lineHeight + 'px ' + font.family;
        } else {
            textStyle = font;
        }

        // Retrieve (or create) the cache for the text's layer and styles

        layerCache = this._textCache[layer];

        if (layerCache == null) {
            layerCache = this._textCache[layer] = {};
        }

        styleCache = layerCache[textStyle];

        if (styleCache == null) {
            styleCache = layerCache[textStyle] = {};
        }

        var key = generateKey(text);
        info = styleCache[key];

        // If we can't find a matching element in our cache, create a new one

        if (!info) {
            var element = document.createElement('div');
            element.innerHTML = text;
            element.style.position = 'absolute';
            element.style.maxWidth = width;
            element.style.top = '-9999px';

            if (typeof font === 'object') {
                element.style.font = textStyle;
                element.style.color = font.color;
            } else if (typeof font === 'string') {
                element.className = font;
            }

            this.getTextLayer(layer).appendChild(element);

            info = styleCache[key] = {
                width: element.offsetWidth,
                height: element.offsetHeight,
                measured: true,
                element: element,
                positions: []
            };

            element.parentNode.removeChild(element);
        }

        info.measured = true;
        return info;
    };

    // Adds a text string to the canvas text overlay.
    //
    // The text isn't drawn immediately; it is marked as rendering, which will
    // result in its addition to the canvas on the next render pass.
    //
    // @param {string} layer A string of space-separated CSS classes uniquely
    //     identifying the layer containing this text.
    // @param {number} x X coordinate at which to draw the text.
    // @param {number} y Y coordinate at which to draw the text.
    // @param {string} text Text string to draw.
    // @param {(string|object)=} font Either a string of space-separated CSS
    //     classes or a font-spec object, defining the text's font and style.
    // @param {number=} angle Angle at which to rotate the text, in degrees.
    //     Angle is currently unused, it will be implemented in the future.
    // @param {number=} width Maximum width of the text before it wraps.
    // @param {string=} halign Horizontal alignment of the text; either "left",
    //     "center" or "right".
    // @param {string=} valign Vertical alignment of the text; either "top",
    //     "middle" or "bottom".

    Canvas.prototype.addText = function(layer, x, y, text, font, angle, width, halign, valign) {
        var info = this.getTextInfo(layer, text, font, angle, width),
            positions = info.positions;

        // Tweak the div's position to match the text's alignment

        if (halign === 'center') {
            x -= info.width / 2;
        } else if (halign === 'right') {
            x -= info.width;
        }

        if (valign === 'middle') {
            y -= info.height / 2;
        } else if (valign === 'bottom') {
            y -= info.height;
        }

        // Determine whether this text already exists at this position.
        // If so, mark it for inclusion in the next render pass.

        for (var i = 0, position; positions[i]; i++) {
            position = positions[i];
            if (position.x === x && position.y === y && position.text === text) {
                position.active = true;
                return;
            } else if (position.active === false) {
                position.active = true;
                position.text = text;
                position.x = x;
                position.y = y;
                position.element.style.top = Math.round(y) + 'px';
                position.element.style.left = Math.round(x) + 'px';
                position.element.innerHTML = text;
                return;
            }
        }

        // If the text doesn't exist at this position, create a new entry

        // For the very first position we'll re-use the original element,
        // while for subsequent ones we'll clone it.

        position = {
            active: true,
            rendered: false,
            element: positions.length ? info.element.cloneNode() : info.element,
            text: text,
            x: x,
            y: y
        };

        positions.push(position);

        // Move the element to its final position within the container

        position.element.style.top = Math.round(y) + 'px';
        position.element.style.left = Math.round(x) + 'px';
        position.element.style.textAlign = halign;

        position.element.innerHTML = text;
    };

    // Removes one or more text strings from the canvas text overlay.
    //
    // If no parameters are given, all text within the layer is removed.
    //
    // Note that the text is not immediately removed; it is simply marked as
    // inactive, which will result in its removal on the next render pass.
    // This avoids the performance penalty for 'clear and redraw' behavior,
    // where we potentially get rid of all text on a layer, but will likely
    // add back most or all of it later, as when redrawing axes, for example.
    //
    // @param {string} layer A string of space-separated CSS classes uniquely
    //     identifying the layer containing this text.
    // @param {number=} x X coordinate of the text.
    // @param {number=} y Y coordinate of the text.
    // @param {string=} text Text string to remove.
    // @param {(string|object)=} font Either a string of space-separated CSS
    //     classes or a font-spec object, defining the text's font and style.
    // @param {number=} angle Angle at which the text is rotated, in degrees.
    //     Angle is currently unused, it will be implemented in the future.

    Canvas.prototype.removeText = function(layer, x, y, text, font, angle) {
        var position, i;
        if (text == null) {
            var layerCache = this._textCache[layer];
            if (layerCache != null) {
                for (var styleKey in layerCache) {
                    if (hasOwnProperty.call(layerCache, styleKey)) {
                        var styleCache = layerCache[styleKey];
                        for (var key in styleCache) {
                            if (hasOwnProperty.call(styleCache, key)) {
                                var positions = styleCache[key].positions;
                                for (i = 0; positions[i]; i++) {
                                    position = positions[i];
                                    position.active = false;
                                }
                            }
                        }
                    }
                }
            }
        } else {
            positions = this.getTextInfo(layer, text, font, angle).positions;
            for (i = 0; positions[i]; i++) {
                position = positions[i];
                if (position.x === x && position.y === y && position.text === text) {
                    position.active = false;
                }
            }
        }
    };

    // Clears the cache used to speed up the text size measurements.
    // As an (unfortunate) side effect all text within the text Layer is removed.
    // Use this function before plot.setupGrid() and plot.draw() in one of these
    // cases:
    // 1. The plot just became visible.
    // 2. The styles changed.
    Canvas.prototype.clearCache = function() {
        var cache = this._textCache;
        for (var layerKey in cache) {
            if (hasOwnProperty.call(cache, layerKey)) {
                var layer = this.getTextLayer(layerKey);
                while (layer.firstChild) {
                    layer.removeChild(layer.firstChild);
                }
            }
        };

        this._textCache = {};
    };

    function generateKey(text) {
        return text.replace(/0|1|2|3|4|5|6|7|8|9/g, '0');
    }

    if (!window.Flot) {
        window.Flot = {};
    }

    window.Flot.Canvas = Canvas;
})();

/* Javascript plotting library for jQuery, version 0.8.3.

Copyright (c) 2007-2014 IOLA and Ole Laursen.
Licensed under the MIT license.

*/

// the actual Flot code
(function($) {
    "use strict";

    var Canvas = window.Flot.Canvas;
    var saturated = {
        saturate: function (a) {
            if (a === Infinity) {
                return Number.MAX_VALUE;
            }

            if (a === -Infinity) {
                return -Number.MAX_VALUE;
            }

            return a;
        },
        delta: function(min, max, noTicks) {
            return ((max - min) / noTicks) === Infinity ? (max / noTicks - min / noTicks) : (max - min) / noTicks
        },
        multiply: function (a, b) {
            return saturated.saturate(a * b);
        }
    };

    ///////////////////////////////////////////////////////////////////////////
    // The top-level container for the entire plot.
    function Plot(placeholder, data_, options_, plugins) {
        // data is on the form:
        //   [ series1, series2 ... ]
        // where series is either just the data as [ [x1, y1], [x2, y2], ... ]
        // or { data: [ [x1, y1], [x2, y2], ... ], label: "some label", ... }

        var series = [],
            options = {
                // the color theme used for graphs
                colors: ["#edc240", "#afd8f8", "#cb4b4b", "#4da74d", "#9440ed"],
                xaxis: {
                    show: null, // null = auto-detect, true = always, false = never
                    position: "bottom", // or "top"
                    mode: null, // null or "time"
                    font: null, // null (derived from CSS in placeholder) or object like { size: 11, lineHeight: 13, style: "italic", weight: "bold", family: "sans-serif", variant: "small-caps" }
                    color: null, // base color, labels, ticks
                    tickColor: null, // possibly different color of ticks, e.g. "rgba(0,0,0,0.15)"
                    transform: null, // null or f: number -> number to transform axis
                    inverseTransform: null, // if transform is set, this should be the inverse function
                    min: null, // min. value to show, null means set automatically
                    max: null, // max. value to show, null means set automatically
                    autoscaleMargin: null, // margin in % to add if autoscale option is on "loose" mode,
                    autoscale: "exact", // Available modes: "none", "loose", "exact", "sliding-window"
                    windowSize: null, // null or number. This is the size of sliding-window.
                    growOnly: null, // grow only, useful for smoother auto-scale, the scales will grow to accomodate data but won't shrink back.
                    ticks: null, // either [1, 3] or [[1, "a"], 3] or (fn: axis info -> ticks) or app. number of ticks for auto-ticks
                    tickFormatter: null, // fn: number -> string
                    showTickLabels: "major", // "none", "endpoints", "major", "all"
                    labelWidth: null, // size of tick labels in pixels
                    labelHeight: null,
                    reserveSpace: null, // whether to reserve space even if axis isn't shown
                    tickLength: null, // size in pixels of major tick marks
                    showMinorTicks: null, // true = show minor tick marks, false = hide minor tick marks
                    showTicks: null, // true = show tick marks, false = hide all tick marks
                    gridLines: null, // true = show grid lines, false = hide grid lines
                    alignTicksWithAxis: null, // axis number or null for no sync
                    tickDecimals: null, // no. of decimals, null means auto
                    tickSize: null, // number or [number, "unit"]
                    minTickSize: null, // number or [number, "unit"]
                    offset: { below: 0, above: 0 }, // the plot drawing offset. this is calculated by the flot.navigate for each axis
                    boxPosition: { centerX: 0, centerY: 0 } //position of the axis on the corresponding axis box
                },
                yaxis: {
                    autoscaleMargin: 0.02, // margin in % to add if autoscale option is on "loose" mode
                    autoscale: "loose", // Available modes: "none", "loose", "exact"
                    growOnly: null, // grow only, useful for smoother auto-scale, the scales will grow to accomodate data but won't shrink back.
                    position: "left", // or "right"
                    showTickLabels: "major", // "none", "endpoints", "major", "all"
                    offset: { below: 0, above: 0 }, // the plot drawing offset. this is calculated by the flot.navigate for each axis
                    boxPosition: { centerX: 0, centerY: 0 } //position of the axis on the corresponding axis box
                },
                xaxes: [],
                yaxes: [],
                series: {
                    points: {
                        show: false,
                        radius: 3,
                        lineWidth: 2, // in pixels
                        fill: true,
                        fillColor: "#ffffff",
                        symbol: 'circle' // or callback
                    },
                    lines: {
                        // we don't put in show: false so we can see
                        // whether lines were actively disabled
                        lineWidth: 1, // in pixels
                        fill: false,
                        fillColor: null,
                        steps: false
                        // Omit 'zero', so we can later default its value to
                        // match that of the 'fill' option.
                    },
                    bars: {
                        show: false,
                        lineWidth: 2, // in pixels
                        barWidth: 1, // in units of the x axis
                        fill: true,
                        fillColor: null,
                        align: "left", // "left", "right", or "center"
                        zero: true
                    },
                    shadowSize: 3,
                    highlightColor: null
                },
                grid: {
                    show: true,
                    aboveData: false,
                    color: "#545454", // primary color used for outline and labels
                    backgroundColor: null, // null for transparent, else color
                    borderColor: null, // set if different from the grid color
                    tickColor: null, // color for the ticks, e.g. "rgba(0,0,0,0.15)"
                    margin: 0, // distance from the canvas edge to the grid
                    labelMargin: 5, // in pixels
                    axisMargin: 8, // in pixels
                    borderWidth: 1, // in pixels
                    minBorderMargin: null, // in pixels, null means taken from points radius
                    markings: null, // array of ranges or fn: axes -> array of ranges
                    markingsColor: "#f4f4f4",
                    markingsLineWidth: 2,
                    // interactive stuff
                    clickable: false,
                    hoverable: false,
                    autoHighlight: true, // highlight in case mouse is near
                    mouseActiveRadius: 10 // how far the mouse can be away to activate an item
                },
                interaction: {
                    redrawOverlayInterval: 1000 / 60 // time between updates, -1 means in same flow
                },
                hooks: {}
            },
            surface = null, // the canvas for the plot itself
            overlay = null, // canvas for interactive stuff on top of plot
            eventHolder = null, // jQuery object that events should be bound to
            ctx = null,
            octx = null,
            xaxes = [],
            yaxes = [],
            plotOffset = {
                left: 0,
                right: 0,
                top: 0,
                bottom: 0
            },
            plotWidth = 0,
            plotHeight = 0,
            hooks = {
                processOptions: [],
                processRawData: [],
                processDatapoints: [],
                processOffset: [],
                setupGrid: [],
                adjustSeriesDataRange: [],
                setRange: [],
                drawBackground: [],
                drawSeries: [],
                drawAxis: [],
                draw: [],
                axisReserveSpace: [],
                bindEvents: [],
                drawOverlay: [],
                shutdown: []
            },
            plot = this;

        // interactive features

        var highlights = [],
            redrawTimeout = null;

        // public functions
        plot.setData = setData;
        plot.setupGrid = setupGrid;
        plot.draw = draw;
        plot.getPlaceholder = function() {
            return placeholder;
        };
        plot.getCanvas = function() {
            return surface.element;
        };
        plot.getSurface = function() {
            return surface;
        };
        plot.getEventHolder = function() {
            return eventHolder[0];
        };
        plot.getPlotOffset = function() {
            return plotOffset;
        };
        plot.width = function() {
            return plotWidth;
        };
        plot.height = function() {
            return plotHeight;
        };
        plot.offset = function() {
            var o = eventHolder.offset();
            o.left += plotOffset.left;
            o.top += plotOffset.top;
            return o;
        };
        plot.getData = function() {
            return series;
        };
        plot.getAxes = function() {
            var res = {};
            $.each(xaxes.concat(yaxes), function(_, axis) {
                if (axis) {
                    res[axis.direction + (axis.n !== 1 ? axis.n : "") + "axis"] = axis;
                }
            });
            return res;
        };
        plot.getXAxes = function() {
            return xaxes;
        };
        plot.getYAxes = function() {
            return yaxes;
        };
        plot.c2p = canvasToCartesianAxisCoords;
        plot.p2c = cartesianAxisToCanvasCoords;
        plot.getOptions = function() {
            return options;
        };
        plot.highlight = highlight;
        plot.unhighlight = unhighlight;
        plot.triggerRedrawOverlay = triggerRedrawOverlay;
        plot.pointOffset = function(point) {
            return {
                left: parseInt(xaxes[axisNumber(point, "x") - 1].p2c(+point.x) + plotOffset.left, 10),
                top: parseInt(yaxes[axisNumber(point, "y") - 1].p2c(+point.y) + plotOffset.top, 10)
            };
        };
        plot.shutdown = shutdown;
        plot.destroy = function() {
            shutdown();
            placeholder.removeData("plot").empty();

            series = [];
            options = null;
            surface = null;
            overlay = null;
            eventHolder = null;
            ctx = null;
            octx = null;
            xaxes = [];
            yaxes = [];
            hooks = null;
            highlights = [];
            plot = null;
        };

        plot.resize = function() {
            var width = placeholder.width(),
                height = placeholder.height();
            surface.resize(width, height);
            overlay.resize(width, height);
        };

        plot.clearTextCache = function () {
            surface.clearCache();
            overlay.clearCache();
        };

        plot.computeRangeForDataSeries = computeRangeForDataSeries;
        plot.adjustSeriesDataRange = adjustSeriesDataRange;
        plot.findNearbyItem = findNearbyItem;
        plot.computeValuePrecision = computeValuePrecision;
        plot.defaultTickFormatter = defaultTickFormatter;
        plot.expRepTickFormatter = expRepTickFormatter;
        plot.computeTickSize = computeTickSize;

        // public attributes
        plot.hooks = hooks;

        // initialize
        var MINOR_TICKS_COUNT_CONSTANT = $.plot.uiConstants.MINOR_TICKS_COUNT_CONSTANT;
        var TICK_LENGTH_CONSTANT = $.plot.uiConstants.TICK_LENGTH_CONSTANT;
        initPlugins(plot);
        parseOptions(options_);
        setupCanvases();
        setData(data_);
        setupGrid();
        draw();
        bindEvents();

        function executeHooks(hook, args) {
            args = [plot].concat(args);
            for (var i = 0; i < hook.length; ++i) {
                hook[i].apply(this, args);
            }
        }

        function initPlugins() {
            // References to key classes, allowing plugins to modify them

            var classes = {
                Canvas: Canvas
            };

            for (var i = 0; i < plugins.length; ++i) {
                var p = plugins[i];
                p.init(plot, classes);
                if (p.options) {
                    $.extend(true, options, p.options);
                }
            }
        }

        function parseOptions(opts) {
            $.extend(true, options, opts);

            // $.extend merges arrays, rather than replacing them.  When less
            // colors are provided than the size of the default palette, we
            // end up with those colors plus the remaining defaults, which is
            // not expected behavior; avoid it by replacing them here.

            if (opts && opts.colors) {
                options.colors = opts.colors;
            }

            if (options.xaxis.color == null) {
                options.xaxis.color = $.color.parse(options.grid.color).scale('a', 0.22).toString();
            }

            if (options.yaxis.color == null) {
                options.yaxis.color = $.color.parse(options.grid.color).scale('a', 0.22).toString();
            }

            if (options.xaxis.tickColor == null) {
                // grid.tickColor for back-compatibility
                options.xaxis.tickColor = options.grid.tickColor || options.xaxis.color;
            }

            if (options.yaxis.tickColor == null) {
                // grid.tickColor for back-compatibility
                options.yaxis.tickColor = options.grid.tickColor || options.yaxis.color;
            }

            if (options.grid.borderColor == null) {
                options.grid.borderColor = options.grid.color;
            }

            if (options.grid.tickColor == null) {
                options.grid.tickColor = $.color.parse(options.grid.color).scale('a', 0.22).toString();
            }

            // Fill in defaults for axis options, including any unspecified
            // font-spec fields, if a font-spec was provided.

            // If no x/y axis options were provided, create one of each anyway,
            // since the rest of the code assumes that they exist.

            var i, axisOptions, axisCount,
                fontSize = placeholder.css("font-size"),
                fontSizeDefault = fontSize ? +fontSize.replace("px", "") : 13,
                fontDefaults = {
                    style: placeholder.css("font-style"),
                    size: Math.round(0.8 * fontSizeDefault),
                    variant: placeholder.css("font-variant"),
                    weight: placeholder.css("font-weight"),
                    family: placeholder.css("font-family")
                };

            axisCount = options.xaxes.length || 1;
            for (i = 0; i < axisCount; ++i) {
                axisOptions = options.xaxes[i];
                if (axisOptions && !axisOptions.tickColor) {
                    axisOptions.tickColor = axisOptions.color;
                }

                axisOptions = $.extend(true, {}, options.xaxis, axisOptions);
                options.xaxes[i] = axisOptions;

                if (axisOptions.font) {
                    axisOptions.font = $.extend({}, fontDefaults, axisOptions.font);
                    if (!axisOptions.font.color) {
                        axisOptions.font.color = axisOptions.color;
                    }
                    if (!axisOptions.font.lineHeight) {
                        axisOptions.font.lineHeight = Math.round(axisOptions.font.size * 1.15);
                    }
                }
            }

            axisCount = options.yaxes.length || 1;
            for (i = 0; i < axisCount; ++i) {
                axisOptions = options.yaxes[i];
                if (axisOptions && !axisOptions.tickColor) {
                    axisOptions.tickColor = axisOptions.color;
                }

                axisOptions = $.extend(true, {}, options.yaxis, axisOptions);
                options.yaxes[i] = axisOptions;

                if (axisOptions.font) {
                    axisOptions.font = $.extend({}, fontDefaults, axisOptions.font);
                    if (!axisOptions.font.color) {
                        axisOptions.font.color = axisOptions.color;
                    }
                    if (!axisOptions.font.lineHeight) {
                        axisOptions.font.lineHeight = Math.round(axisOptions.font.size * 1.15);
                    }
                }
            }

            // save options on axes for future reference
            for (i = 0; i < options.xaxes.length; ++i) {
                getOrCreateAxis(xaxes, i + 1).options = options.xaxes[i];
            }

            for (i = 0; i < options.yaxes.length; ++i) {
                getOrCreateAxis(yaxes, i + 1).options = options.yaxes[i];
            }

            //process boxPosition options used for axis.box size
            $.each(allAxes(), function(_, axis) {
                axis.boxPosition = axis.options.boxPosition || {centerX: 0, centerY: 0};
            });

            // add hooks from options
            for (var n in hooks) {
                if (options.hooks[n] && options.hooks[n].length) {
                    hooks[n] = hooks[n].concat(options.hooks[n]);
                }
            }

            executeHooks(hooks.processOptions, [options]);
        }

        function setData(d) {
            var oldseries = series;
            series = parseData(d);
            fillInSeriesOptions();
            processData(oldseries);
        }

        function parseData(d) {
            var res = [];
            for (var i = 0; i < d.length; ++i) {
                var s = $.extend(true, {}, options.series);

                if (d[i].data != null) {
                    s.data = d[i].data; // move the data instead of deep-copy
                    delete d[i].data;

                    $.extend(true, s, d[i]);

                    d[i].data = s.data;
                } else {
                    s.data = d[i];
                }

                res.push(s);
            }

            return res;
        }

        function axisNumber(obj, coord) {
            var a = obj[coord + "axis"];
            if (typeof a === "object") {
                // if we got a real axis, extract number
                a = a.n;
            }

            if (typeof a !== "number") {
                a = 1; // default to first axis
            }

            return a;
        }

        function allAxes() {
            // return flat array without annoying null entries
            return xaxes.concat(yaxes).filter(function(a) {
                return a;
            });
        }

        // canvas to axis for cartesian axes
        function canvasToCartesianAxisCoords(pos) {
            // return an object with x/y corresponding to all used axes
            var res = {},
                i, axis;
            for (i = 0; i < xaxes.length; ++i) {
                axis = xaxes[i];
                if (axis && axis.used) {
                    res["x" + axis.n] = axis.c2p(pos.left);
                }
            }

            for (i = 0; i < yaxes.length; ++i) {
                axis = yaxes[i];
                if (axis && axis.used) {
                    res["y" + axis.n] = axis.c2p(pos.top);
                }
            }

            if (res.x1 !== undefined) {
                res.x = res.x1;
            }

            if (res.y1 !== undefined) {
                res.y = res.y1;
            }

            return res;
        }

        // axis to canvas for cartesian axes
        function cartesianAxisToCanvasCoords(pos) {
            // get canvas coords from the first pair of x/y found in pos
            var res = {},
                i, axis, key;

            for (i = 0; i < xaxes.length; ++i) {
                axis = xaxes[i];
                if (axis && axis.used) {
                    key = "x" + axis.n;
                    if (pos[key] == null && axis.n === 1) {
                        key = "x";
                    }

                    if (pos[key] != null) {
                        res.left = axis.p2c(pos[key]);
                        break;
                    }
                }
            }

            for (i = 0; i < yaxes.length; ++i) {
                axis = yaxes[i];
                if (axis && axis.used) {
                    key = "y" + axis.n;
                    if (pos[key] == null && axis.n === 1) {
                        key = "y";
                    }

                    if (pos[key] != null) {
                        res.top = axis.p2c(pos[key]);
                        break;
                    }
                }
            }

            return res;
        }

        function getOrCreateAxis(axes, number) {
            if (!axes[number - 1]) {
                axes[number - 1] = {
                    n: number, // save the number for future reference
                    direction: axes === xaxes ? "x" : "y",
                    options: $.extend(true, {}, axes === xaxes ? options.xaxis : options.yaxis)
                };
            }

            return axes[number - 1];
        }

        function fillInSeriesOptions() {
            var neededColors = series.length,
                maxIndex = -1,
                i;

            // Subtract the number of series that already have fixed colors or
            // color indexes from the number that we still need to generate.

            for (i = 0; i < series.length; ++i) {
                var sc = series[i].color;
                if (sc != null) {
                    neededColors--;
                    if (typeof sc === "number" && sc > maxIndex) {
                        maxIndex = sc;
                    }
                }
            }

            // If any of the series have fixed color indexes, then we need to
            // generate at least as many colors as the highest index.

            if (neededColors <= maxIndex) {
                neededColors = maxIndex + 1;
            }

            // Generate all the colors, using first the option colors and then
            // variations on those colors once they're exhausted.

            var c, colors = [],
                colorPool = options.colors,
                colorPoolSize = colorPool.length,
                variation = 0;

            for (i = 0; i < neededColors; i++) {
                c = $.color.parse(colorPool[i % colorPoolSize] || "#666");

                // Each time we exhaust the colors in the pool we adjust
                // a scaling factor used to produce more variations on
                // those colors. The factor alternates negative/positive
                // to produce lighter/darker colors.

                // Reset the variation after every few cycles, or else
                // it will end up producing only white or black colors.

                if (i % colorPoolSize === 0 && i) {
                    if (variation >= 0) {
                        if (variation < 0.5) {
                            variation = -variation - 0.2;
                        } else variation = 0;
                    } else variation = -variation;
                }

                colors[i] = c.scale('rgb', 1 + variation);
            }

            // Finalize the series options, filling in their colors

            var colori = 0,
                s;
            for (i = 0; i < series.length; ++i) {
                s = series[i];

                // assign colors
                if (s.color == null) {
                    s.color = colors[colori].toString();
                    ++colori;
                } else if (typeof s.color === "number") {
                    s.color = colors[s.color].toString();
                }

                // turn on lines automatically in case nothing is set
                if (s.lines.show == null) {
                    var v, show = true;
                    for (v in s) {
                        if (s[v] && s[v].show) {
                            show = false;
                            break;
                        }
                    }

                    if (show) {
                        s.lines.show = true;
                    }
                }

                // If nothing was provided for lines.zero, default it to match
                // lines.fill, since areas by default should extend to zero.

                if (s.lines.zero == null) {
                    s.lines.zero = !!s.lines.fill;
                }

                // setup axes
                s.xaxis = getOrCreateAxis(xaxes, axisNumber(s, "x"));
                s.yaxis = getOrCreateAxis(yaxes, axisNumber(s, "y"));
            }
        }

        function processData(prevSeries) {
            var topSentry = Number.POSITIVE_INFINITY,
                bottomSentry = Number.NEGATIVE_INFINITY,
                fakeInfinity = Number.MAX_VALUE,
                i, j, k, m,
                s, points, ps, val, f, p,
                data, format;

            function updateAxis(axis, min, max) {
                if (min < axis.datamin && min !== -fakeInfinity) {
                    axis.datamin = min;
                }

                if (max > axis.datamax && max !== fakeInfinity) {
                    axis.datamax = max;
                }
            }

            function reusePoints(prevSeries, i) {
                if (prevSeries && prevSeries[i] && prevSeries[i].datapoints && prevSeries[i].datapoints.points) {
                    return prevSeries[i].datapoints.points;
                }

                return [];
            }

            $.each(allAxes(), function(_, axis) {
                // init axis
                if (axis.options.growOnly !== true) {
                    axis.datamin = topSentry;
                    axis.datamax = bottomSentry;
                } else {
                    if (axis.datamin === undefined) {
                        axis.datamin = topSentry;
                    }
                    if (axis.datamax === undefined) {
                        axis.datamax = bottomSentry;
                    }
                }
                axis.used = false;
            });

            for (i = 0; i < series.length; ++i) {
                s = series[i];
                s.datapoints = {
                    points: []
                };

                if (s.datapoints.points.length === 0) {
                    s.datapoints.points = reusePoints(prevSeries, i);
                }

                executeHooks(hooks.processRawData, [s, s.data, s.datapoints]);
            }

            // first pass: clean and copy data
            for (i = 0; i < series.length; ++i) {
                s = series[i];

                data = s.data;
                format = s.datapoints.format;

                if (!format) {
                    format = [];
                    // find out how to copy
                    format.push({
                        x: true,
                        y: false,
                        number: true,
                        required: true,
                        computeRange: s.xaxis.options.autoscale !== 'none',
                        defaultValue: null
                    });

                    format.push({
                        x: false,
                        y: true,
                        number: true,
                        required: true,
                        computeRange: s.yaxis.options.autoscale !== 'none',
                        defaultValue: null
                    });

                    if (s.bars.show || (s.lines.show && s.lines.fill)) {
                        var expectedPs = s.datapoints.pointsize != null ? s.datapoints.pointsize : (s.data && s.data[0] && s.data[0].length ? s.data[0].length : 3);
                        if (expectedPs > 2) {
                            format.push({
                                x: false,
                                y: true,
                                number: true,
                                required: false,
                                computeRange: s.yaxis.options.autoscale !== 'none',
                                defaultValue: 0
                            });
                        }
                    }

                    s.datapoints.format = format;
                }

                s.xaxis.used = s.yaxis.used = true;

                if (s.datapoints.pointsize != null) continue; // already filled in

                s.datapoints.pointsize = format.length;
                ps = s.datapoints.pointsize;
                points = s.datapoints.points;

                var insertSteps = s.lines.show && s.lines.steps;

                for (j = k = 0; j < data.length; ++j, k += ps) {
                    p = data[j];

                    var nullify = p == null;
                    if (!nullify) {
                        for (m = 0; m < ps; ++m) {
                            val = p[m];
                            f = format[m];

                            if (f) {
                                if (f.number && val != null) {
                                    val = +val; // convert to number
                                    if (isNaN(val)) {
                                        val = null;
                                    } else if (val === Infinity) {
                                        val = fakeInfinity;
                                    } else if (val === -Infinity) {
                                        val = -fakeInfinity;
                                    }
                                }

                                if (val == null) {
                                    if (f.required) nullify = true;

                                    if (f.defaultValue != null) val = f.defaultValue;
                                }
                            }

                            points[k + m] = val;
                        }
                    }

                    if (nullify) {
                        for (m = 0; m < ps; ++m) {
                            val = points[k + m];
                            if (val != null) {
                                f = format[m];
                                // extract min/max info
                                if (f.computeRange) {
                                    if (f.x) {
                                        updateAxis(s.xaxis, val, val);
                                    }
                                    if (f.y) {
                                        updateAxis(s.yaxis, val, val);
                                    }
                                }
                            }
                            points[k + m] = null;
                        }
                    } else {
                        // a little bit of line specific stuff that
                        // perhaps shouldn't be here, but lacking
                        // better means...
                        if (insertSteps && k > 0 &&
                            points[k - ps] != null &&
                            points[k - ps] !== points[k] &&
                            points[k - ps + 1] !== points[k + 1]) {
                            // copy the point to make room for a middle point
                            for (m = 0; m < ps; ++m) {
                                points[k + ps + m] = points[k + m];
                            }

                            // middle point has same y
                            points[k + 1] = points[k - ps + 1];

                            // we've added a point, better reflect that
                            k += ps;
                        }
                    }
                }

                points.length = k; //trims the internal buffer to the correct length
            }

            // give the hooks a chance to run
            for (i = 0; i < series.length; ++i) {
                s = series[i];

                executeHooks(hooks.processDatapoints, [s, s.datapoints]);
            }

            // second pass: find datamax/datamin for auto-scaling
            for (i = 0; i < series.length; ++i) {
                s = series[i];
                format = s.datapoints.format;

                if (format.every(function (f) { return !f.computeRange; })) {
                    continue;
                }

                var range = plot.adjustSeriesDataRange(s,
                    plot.computeRangeForDataSeries(s));

                executeHooks(hooks.adjustSeriesDataRange, [s, range]);

                updateAxis(s.xaxis, range.xmin, range.xmax);
                updateAxis(s.yaxis, range.ymin, range.ymax);
            }

            $.each(allAxes(), function(_, axis) {
                if (axis.datamin === topSentry) {
                    axis.datamin = null;
                }

                if (axis.datamax === bottomSentry) {
                    axis.datamax = null;
                }
            });
        }

        function setupCanvases() {
            // Make sure the placeholder is clear of everything except canvases
            // from a previous plot in this container that we'll try to re-use.

            placeholder.css("padding", 0) // padding messes up the positioning
                .children().filter(function() {
                    return !$(this).hasClass("flot-overlay") && !$(this).hasClass('flot-base');
                }).remove();

            if (placeholder.css("position") === 'static') {
                placeholder.css("position", "relative"); // for positioning labels and overlay
            }

            surface = new Canvas("flot-base", placeholder[0]);
            overlay = new Canvas("flot-overlay", placeholder[0]); // overlay canvas for interactive features

            ctx = surface.context;
            octx = overlay.context;

            // define which element we're listening for events on
            eventHolder = $(overlay.element).unbind();

            // If we're re-using a plot object, shut down the old one

            var existing = placeholder.data("plot");

            if (existing) {
                existing.shutdown();
                overlay.clear();
            }

            // save in case we get replotted
            placeholder.data("plot", plot);
        }

        function bindEvents() {
            // bind events
            if (options.grid.hoverable) {
                eventHolder.mousemove(onMouseMove);

                // Use bind, rather than .mouseleave, because we officially
                // still support jQuery 1.2.6, which doesn't define a shortcut
                // for mouseenter or mouseleave.  This was a bug/oversight that
                // was fixed somewhere around 1.3.x.  We can return to using
                // .mouseleave when we drop support for 1.2.6.

                eventHolder.bind("mouseleave", onMouseLeave);
            }

            if (options.grid.clickable) {
                eventHolder.click(onClick);
            }

            executeHooks(hooks.bindEvents, [eventHolder]);
        }

        function shutdown() {
            if (redrawTimeout) {
                clearTimeout(redrawTimeout);
            }

            eventHolder.unbind("mousemove", onMouseMove);
            eventHolder.unbind("mouseleave", onMouseLeave);
            eventHolder.unbind("click", onClick);

            executeHooks(hooks.shutdown, [eventHolder]);
        }

        function setTransformationHelpers(axis) {
            // set helper functions on the axis, assumes plot area
            // has been computed already

            function identity(x) {
                return x;
            }

            var s, m, t = axis.options.transform || identity,
                it = axis.options.inverseTransform;

            // precompute how much the axis is scaling a point
            // in canvas space
            if (axis.direction === "x") {
                s = axis.scale = plotWidth / Math.abs(t(axis.max) - t(axis.min));
                m = Math.min(t(axis.max), t(axis.min));
            } else {
                s = axis.scale = plotHeight / Math.abs(t(axis.max) - t(axis.min));
                s = -s;
                m = Math.max(t(axis.max), t(axis.min));
            }

            // data point to canvas coordinate
            if (t === identity) {
                // slight optimization
                axis.p2c = function(p) {
                    return (p - m) * s;
                };
            } else {
                axis.p2c = function(p) {
                    return (t(p) - m) * s;
                };
            }

            // canvas coordinate to data point
            if (!it) {
                axis.c2p = function(c) {
                    return m + c / s;
                };
            } else {
                axis.c2p = function(c) {
                    return it(m + c / s);
                };
            }
        }

        function measureTickLabels(axis) {
            var opts = axis.options,
                ticks = opts.showTickLabels !== 'none' && axis.ticks ? axis.ticks : [],
                showMajorTickLabels = opts.showTickLabels === 'major' || opts.showTickLabels === 'all',
                showEndpointsTickLabels = opts.showTickLabels === 'endpoints' || opts.showTickLabels === 'all',
                labelWidth = opts.labelWidth || 0,
                labelHeight = opts.labelHeight || 0,
                legacyStyles = axis.direction + "Axis " + axis.direction + axis.n + "Axis",
                layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + legacyStyles,
                font = opts.font || "flot-tick-label tickLabel";

            for (var i = 0; i < ticks.length; ++i) {
                var t = ticks[i];
                var label = t.label;

                if (!t.label ||
                    (showMajorTickLabels === false && i > 0 && i < ticks.length - 1) ||
                    (showEndpointsTickLabels === false && (i === 0 || i === ticks.length - 1))) {
                    continue;
                }

                if (typeof t.label === 'object') {
                    label = t.label.name;
                }

                var info = surface.getTextInfo(layer, label, font);

                labelWidth = Math.max(labelWidth, info.width);
                labelHeight = Math.max(labelHeight, info.height);
            }

            axis.labelWidth = opts.labelWidth || labelWidth;
            axis.labelHeight = opts.labelHeight || labelHeight;
        }

        function allocateAxisBoxFirstPhase(axis) {
            // find the bounding box of the axis by looking at label
            // widths/heights and ticks, make room by diminishing the
            // plotOffset; this first phase only looks at one
            // dimension per axis, the other dimension depends on the
            // other axes so will have to wait

            // here reserve additional space
            executeHooks(hooks.axisReserveSpace, [axis]);

            var lw = axis.labelWidth,
                lh = axis.labelHeight,
                pos = axis.options.position,
                isXAxis = axis.direction === "x",
                tickLength = axis.options.tickLength,
                showTicks = axis.options.showTicks,
                showMinorTicks = axis.options.showMinorTicks,
                gridLines = axis.options.gridLines,
                axisMargin = options.grid.axisMargin,
                padding = options.grid.labelMargin,
                innermost = true,
                outermost = true,
                found = false;

            // Determine the axis's position in its direction and on its side

            $.each(isXAxis ? xaxes : yaxes, function(i, a) {
                if (a && (a.show || a.reserveSpace)) {
                    if (a === axis) {
                        found = true;
                    } else if (a.options.position === pos) {
                        if (found) {
                            outermost = false;
                        } else {
                            innermost = false;
                        }
                    }
                }
            });

            // The outermost axis on each side has no margin
            if (outermost) {
                axisMargin = 0;
            }

            // Set the default tickLength if necessary
            if (tickLength == null) {
                tickLength = TICK_LENGTH_CONSTANT;
            }

            // By default, major tick marks are visible
            if (showTicks == null) {
                showTicks = true;
            }

            // By default, minor tick marks are visible
            if (showMinorTicks == null) {
                showMinorTicks = true;
            }

            // By default, grid lines are visible
            if (gridLines == null) {
                if (innermost) {
                    gridLines = true;
                } else {
                    gridLines = false;
                }
            }

            if (!isNaN(+tickLength)) {
                padding += showTicks ? +tickLength : 0;
            }

            if (isXAxis) {
                lh += padding;

                if (pos === "bottom") {
                    plotOffset.bottom += lh + axisMargin;
                    axis.box = {
                        top: surface.height - plotOffset.bottom,
                        height: lh
                    };
                } else {
                    axis.box = {
                        top: plotOffset.top + axisMargin,
                        height: lh
                    };
                    plotOffset.top += lh + axisMargin;
                }
            } else {
                lw += padding;

                if (pos === "left") {
                    axis.box = {
                        left: plotOffset.left + axisMargin,
                        width: lw
                    };
                    plotOffset.left += lw + axisMargin;
                } else {
                    plotOffset.right += lw + axisMargin;
                    axis.box = {
                        left: surface.width - plotOffset.right,
                        width: lw
                    };
                }
            }

            // save for future reference
            axis.position = pos;
            axis.tickLength = tickLength;
            axis.showMinorTicks = showMinorTicks;
            axis.showTicks = showTicks;
            axis.gridLines = gridLines;
            axis.box.padding = padding;
            axis.innermost = innermost;
        }

        function allocateAxisBoxSecondPhase(axis) {
            // now that all axis boxes have been placed in one
            // dimension, we can set the remaining dimension coordinates
            if (axis.direction === "x") {
                axis.box.left = plotOffset.left - axis.labelWidth / 2;
                axis.box.width = surface.width - plotOffset.left - plotOffset.right + axis.labelWidth;
            } else {
                axis.box.top = plotOffset.top - axis.labelHeight / 2;
                axis.box.height = surface.height - plotOffset.bottom - plotOffset.top + axis.labelHeight;
            }
        }

        function adjustLayoutForThingsStickingOut() {
            // possibly adjust plot offset to ensure everything stays
            // inside the canvas and isn't clipped off

            var minMargin = options.grid.minBorderMargin,
                i;

            // check stuff from the plot (FIXME: this should just read
            // a value from the series, otherwise it's impossible to
            // customize)
            if (minMargin == null) {
                minMargin = 0;
                for (i = 0; i < series.length; ++i) {
                    minMargin = Math.max(minMargin, 2 * (series[i].points.radius + series[i].points.lineWidth / 2));
                }
            }

            var margins = {
                left: minMargin,
                right: minMargin,
                top: minMargin,
                bottom: minMargin
            };

            // check axis labels, note we don't check the actual
            // labels but instead use the overall width/height to not
            // jump as much around with replots
            $.each(allAxes(), function(_, axis) {
                if (axis.reserveSpace && axis.ticks && axis.ticks.length) {
                    if (axis.direction === "x") {
                        margins.left = Math.max(margins.left, axis.labelWidth / 2);
                        margins.right = Math.max(margins.right, axis.labelWidth / 2);
                    } else {
                        margins.bottom = Math.max(margins.bottom, axis.labelHeight / 2);
                        margins.top = Math.max(margins.top, axis.labelHeight / 2);
                    }
                }
            });

            plotOffset.left = Math.ceil(Math.max(margins.left, plotOffset.left));
            plotOffset.right = Math.ceil(Math.max(margins.right, plotOffset.right));
            plotOffset.top = Math.ceil(Math.max(margins.top, plotOffset.top));
            plotOffset.bottom = Math.ceil(Math.max(margins.bottom, plotOffset.bottom));
        }

        function setupGrid() {
            var i, a, axes = allAxes(),
                showGrid = options.grid.show;

            // Initialize the plot's offset from the edge of the canvas

            for (a in plotOffset) {
                var margin = options.grid.margin || 0;
                plotOffset[a] = typeof margin === "number" ? margin : margin[a] || 0;
            }

            executeHooks(hooks.processOffset, [plotOffset]);

            // If the grid is visible, add its border width to the offset

            for (a in plotOffset) {
                if (typeof (options.grid.borderWidth) === "object") {
                    plotOffset[a] += showGrid ? options.grid.borderWidth[a] : 0;
                } else {
                    plotOffset[a] += showGrid ? options.grid.borderWidth : 0;
                }
            }

            $.each(axes, function(_, axis) {
                var axisOpts = axis.options;
                axis.show = axisOpts.show == null ? axis.used : axisOpts.show;
                axis.reserveSpace = axisOpts.reserveSpace == null ? axis.show : axisOpts.reserveSpace;
                setupTickFormatter(axis);
                executeHooks(hooks.setRange, [axis]);
                setRange(axis);
            });

            if (showGrid) {
                plotWidth = surface.width - plotOffset.left - plotOffset.right;
                plotHeight = surface.height - plotOffset.bottom - plotOffset.top;

                var allocatedAxes = $.grep(axes, function(axis) {
                    return axis.show || axis.reserveSpace;
                });

                $.each(allocatedAxes, function(_, axis) {
                    // make the ticks
                    setupTickGeneration(axis);
                    setMajorTicks(axis);
                    snapRangeToTicks(axis, axis.ticks);

                    //for computing the endpoints precision, transformationHelpers are needed
                    setTransformationHelpers(axis);
                    setEndpointTicks(axis);

                    // find labelWidth/Height for axis
                    measureTickLabels(axis);
                });

                // with all dimensions calculated, we can compute the
                // axis bounding boxes, start from the outside
                // (reverse order)
                for (i = allocatedAxes.length - 1; i >= 0; --i) {
                    allocateAxisBoxFirstPhase(allocatedAxes[i]);
                }

                // make sure we've got enough space for things that
                // might stick out
                adjustLayoutForThingsStickingOut();

                $.each(allocatedAxes, function(_, axis) {
                    allocateAxisBoxSecondPhase(axis);
                });
            }

            //after adjusting the axis, plot width and height will be modified
            plotWidth = surface.width - plotOffset.left - plotOffset.right;
            plotHeight = surface.height - plotOffset.bottom - plotOffset.top;

            // now we got the proper plot dimensions, we can compute the scaling
            $.each(axes, function(_, axis) {
                setTransformationHelpers(axis);
            });

            if (showGrid) {
                drawAxisLabels();
            }

            executeHooks(hooks.setupGrid, []);
        }

        function widenMinMax(minimum, maximum) {
            var min = (minimum === undefined ? null : minimum);
            var max = (maximum === undefined ? null : maximum);
            var delta = max - min;
            if (delta === 0.0) {
                // degenerate case
                var widen = max === 0 ? 1 : 0.01;
                var wmin = null;
                if (min == null) {
                    wmin -= widen;
                }

                // always widen max if we couldn't widen min to ensure we
                // don't fall into min == max which doesn't work
                if (max == null || min != null) {
                    max += widen;
                }

                if (wmin != null) {
                    min = wmin;
                }
            }

            return {
                min: min,
                max: max
            };
        }

        function autoscaleAxis(axis) {
            var opts = axis.options,
                min = opts.min,
                max = opts.max,
                datamin = axis.datamin,
                datamax = axis.datamax,
                delta;

            switch (opts.autoscale) {
                case "none":
                    min = +(opts.min != null ? opts.min : datamin);
                    max = +(opts.max != null ? opts.max : datamax);
                    break;
                case "loose":
                    if (datamin != null && datamax != null) {
                        min = datamin;
                        max = datamax;
                        delta = saturated.saturate(max - min);
                        var margin = ((typeof opts.autoscaleMargin === 'number') ? opts.autoscaleMargin : 0.02);
                        min -= delta * margin;
                        max += delta * margin;
                    } else {
                        min = opts.min;
                        max = opts.max;
                    }
                    break;
                case "exact":
                    min = (datamin != null ? datamin : opts.min);
                    max = (datamax != null ? datamax : opts.max);
                    break;
                case "sliding-window":
                    if (datamax > max) {
                        // move the window to fit the new data,
                        // keeping the axis range constant
                        max = datamax;
                        min = Math.max(datamax - (opts.windowSize || 100), min);
                    }
                    break;
            }

            var widenedMinMax = widenMinMax(min, max);
            min = widenedMinMax.min;
            max = widenedMinMax.max;

            // grow loose or grow exact supported
            if (opts.growOnly === true && opts.autoscale !== "none" && opts.autoscale !== "sliding-window") {
                min = (min < datamin) ? min : (datamin !== null ? datamin : min);
                max = (max > datamax) ? max : (datamax !== null ? datamax : max);
            }

            axis.autoscaledMin = min;
            axis.autoscaledMax = max;
        }

        function setRange(axis) {
            autoscaleAxis(axis);

            var min = axis.autoscaledMin,
                max = axis.autoscaledMax,
                plotOffset = axis.options.offset;

            min = (min != null ? min : -1) + (plotOffset.below || 0);
            max = (max != null ? max : 1) + (plotOffset.above || 0);

            if (min > max) {
                var tmp = max;
                max = min;
                min = tmp;
            }

            axis.min = saturated.saturate(min);
            axis.max = saturated.saturate(max);
        }

        function computeValuePrecision (min, max, direction, ticks, tickDecimals) {
            var noTicks = fixupNumberOfTicks(direction, surface, ticks);

            var delta = (max - min) / noTicks,
                dec = -Math.floor(Math.log(delta) / Math.LN10);

            //if it is called with tickDecimals, then the precision should not be greather then that
            if (tickDecimals && dec > tickDecimals) {
                dec = tickDecimals;
            }

            var magn = Math.pow(10, -dec),
                norm = delta / magn;

            if (norm > 2.25 && norm < 3 && (dec + 1) <= tickDecimals) {
                //we need an extra decimals when tickSize is 2.5
                ++dec;
            }

            return dec;
        };

        function computeTickSize (min, max, noTicks, tickDecimals) {
            var delta = saturated.delta(min, max, noTicks),
                dec = -Math.floor(Math.log(delta) / Math.LN10);

            //if it is called with tickDecimals, then the precision should not be greather then that
            if (dec > tickDecimals) {
                dec = tickDecimals;
            }

            var magn = Math.pow(10, -dec),
                norm = delta / magn, // norm is between 1.0 and 10.0
                size;

            if (norm < 1.5) {
                size = 1;
            } else if (norm < 3) {
                size = 2;
                if (norm > 2.25 && (tickDecimals == null || (dec + 1) <= tickDecimals)) {
                    size = 2.5;
                }
            } else if (norm < 7.5) {
                size = 5;
            } else {
                size = 10;
            }

            size *= magn;
            return size;
        }

        function getAxisTickSize(min, max, direction, options, tickDecimals) {
            var noTicks;

            if (typeof options.ticks === "number" && options.ticks > 0) {
                noTicks = options.ticks;
            } else {
            // heuristic based on the model a*sqrt(x) fitted to
            // some data points that seemed reasonable
                noTicks = 0.3 * Math.sqrt(direction === "x" ? surface.width : surface.height);
            }

            var size = computeTickSize(min, max, noTicks, tickDecimals);

            if (options.minTickSize != null && size < options.minTickSize) {
                size = options.minTickSize;
            }

            return options.tickSize || size;
        };

        function defaultTickGenerator(axis) {
            var ticks = [],
                start = floorInBase(axis.min, axis.tickSize),
                i = 0,
                v = Number.NaN,
                prev;

            do {
                prev = v;
                v = start + i * axis.tickSize;
                ticks.push(v);
                ++i;
            } while (v < axis.max && v !== prev);

            return ticks;
        }

        function defaultTickFormatter(value, axis, precision) {
            var oldTickDecimals = axis.tickDecimals,
                expPosition = ("" + value).indexOf("e");

            if (value === 0) {
                return "0";
            }

            if (expPosition !== -1) {
                return expRepTickFormatter(value, axis, precision);
            }

            if (precision > 0) {
                axis.tickDecimals = precision;
            }

            var factor = axis.tickDecimals ? Math.pow(10, axis.tickDecimals) : 1,
                formatted = "" + Math.round(value * factor) / factor;

            // If tickDecimals was specified, ensure that we have exactly that
            // much precision; otherwise default to the value's own precision.
            if (axis.tickDecimals != null) {
                var decimal = formatted.indexOf("."),
                    decimalPrecision = decimal === -1 ? 0 : formatted.length - decimal - 1;
                if (decimalPrecision < axis.tickDecimals) {
                    var decimals = ("" + factor).substr(1, axis.tickDecimals - decimalPrecision);
                    formatted = (decimalPrecision ? formatted : formatted + ".") + decimals;
                }
            }

            axis.tickDecimals = oldTickDecimals;
            return formatted;
        };

        function expRepTickFormatter(value, axis, precision) {
            var expPosition = ("" + value).indexOf("e"),
                exponentValue = parseInt(("" + value).substr(expPosition + 1)),
                tenExponent = expPosition !== -1 ? exponentValue : (value > 0 ? Math.floor(Math.log(value) / Math.LN10) : 0),
                roundWith = Math.pow(10, tenExponent),
                x = value / roundWith;

            if (precision) {
                var updatedPrecision = recomputePrecision(value, precision);
                return (value / roundWith).toFixed(updatedPrecision) + 'e' + tenExponent;
            }

            if (axis.tickDecimals > 0) {
                return x.toFixed(recomputePrecision(value, axis.tickDecimals)) + 'e' + tenExponent;
            }
            return x.toFixed() + 'e' + tenExponent;
        }

        function recomputePrecision(num, precision) {
            //for numbers close to zero, the precision from flot will be a big number
            //while for big numbers, the precision will be negative
            var log10Value = Math.log(Math.abs(num)) * Math.LOG10E,
                newPrecision = Math.abs(log10Value + precision);

            return newPrecision <= 20 ? Math.floor(newPrecision) : 20;
        }

        function fixupNumberOfTicks(direction, surface, ticksOption) {
            var noTicks;

            if (typeof ticksOption === "number" && ticksOption > 0) {
                noTicks = ticksOption;
            } else {
                noTicks = 0.3 * Math.sqrt(direction === "x" ? surface.width : surface.height);
            }

            return noTicks;
        }

        function setupTickFormatter(axis) {
            var opts = axis.options;
            if (!axis.tickFormatter) {
                if (typeof opts.tickFormatter === 'function') {
                    axis.tickFormatter = function(v, axis, precision) {
                        return "" + opts.tickFormatter(v, axis, precision);
                    };
                } else {
                    axis.tickFormatter = defaultTickFormatter;
                }
            }
        }

        function setupTickGeneration(axis) {
            var opts = axis.options;
            var noTicks;

            noTicks = fixupNumberOfTicks(axis.direction, surface, opts.ticks);

            axis.delta = saturated.delta(axis.min, axis.max, noTicks);
            var precision = plot.computeValuePrecision(axis.min, axis.max, axis.direction, noTicks, opts.tickDecimals);

            axis.tickDecimals = Math.max(0, opts.tickDecimals != null ? opts.tickDecimals : precision);
            axis.tickSize = getAxisTickSize(axis.min, axis.max, axis.direction, opts, opts.tickDecimals);

            // Time mode was moved to a plug-in in 0.8, and since so many people use it
            // we'll add an especially friendly reminder to make sure they included it.

            if (opts.mode === "time" && !axis.tickGenerator) {
                throw new Error("Time mode requires the flot.time plugin.");
            }

            // Flot supports base-10 axes; any other mode else is handled by a plug-in,
            // like flot.time.js.

            if (!axis.tickGenerator) {
                axis.tickGenerator = defaultTickGenerator;
            }

            if (opts.alignTicksWithAxis != null) {
                var otherAxis = (axis.direction === "x" ? xaxes : yaxes)[opts.alignTicksWithAxis - 1];
                if (otherAxis && otherAxis.used && otherAxis !== axis) {
                    // consider snapping min/max to outermost nice ticks
                    var niceTicks = axis.tickGenerator(axis);
                    if (niceTicks.length > 0) {
                        if (opts.min == null) {
                            axis.min = Math.min(axis.min, niceTicks[0]);
                        }

                        if (opts.max == null && niceTicks.length > 1) {
                            axis.max = Math.max(axis.max, niceTicks[niceTicks.length - 1]);
                        }
                    }

                    axis.tickGenerator = function(axis) {
                        // copy ticks, scaled to this axis
                        var ticks = [],
                            v, i;
                        for (i = 0; i < otherAxis.ticks.length; ++i) {
                            v = (otherAxis.ticks[i].v - otherAxis.min) / (otherAxis.max - otherAxis.min);
                            v = axis.min + v * (axis.max - axis.min);
                            ticks.push(v);
                        }
                        return ticks;
                    };

                    // we might need an extra decimal since forced
                    // ticks don't necessarily fit naturally
                    if (!axis.mode && opts.tickDecimals == null) {
                        var extraDec = Math.max(0, -Math.floor(Math.log(axis.delta) / Math.LN10) + 1),
                            ts = axis.tickGenerator(axis);

                        // only proceed if the tick interval rounded
                        // with an extra decimal doesn't give us a
                        // zero at end
                        if (!(ts.length > 1 && /\..*0$/.test((ts[1] - ts[0]).toFixed(extraDec)))) {
                            axis.tickDecimals = extraDec;
                        }
                    }
                }
            }
        }

        function setMajorTicks(axis) {
            var oticks = axis.options.ticks,
                ticks = [];
            if (oticks == null || (typeof oticks === "number" && oticks > 0)) {
                ticks = axis.tickGenerator(axis);
            } else if (oticks) {
                if ($.isFunction(oticks)) {
                // generate the ticks
                    ticks = oticks(axis);
                } else {
                    ticks = oticks;
                }
            }

            // clean up/labelify the supplied ticks, copy them over
            var i, v;
            axis.ticks = [];
            for (i = 0; i < ticks.length; ++i) {
                var label = null;
                var t = ticks[i];
                if (typeof t === "object") {
                    v = +t[0];
                    if (t.length > 1) {
                        label = t[1];
                    }
                } else {
                    v = +t;
                }

                if (!isNaN(v)) {
                    axis.ticks.push(
                        newTick(v, label, axis, 'major'));
                }
            }
        }

        function newTick(v, label, axis, type) {
            if (!label) {
                switch (type) {
                    case 'min':
                    case 'max':
                        //improving the precision of endpoints
                        var precision = getEndpointPrecision(v, axis);
                        label = isFinite(precision) ? axis.tickFormatter(v, axis, precision) : axis.tickFormatter(v, axis, precision);
                        break;
                    case 'major':
                        label = axis.tickFormatter(v, axis)
                }
            }
            return {
                v: v,
                label: label
            };
        }

        function snapRangeToTicks(axis, ticks) {
            if (axis.options.autoscale === "loose" && ticks.length > 0) {
                // snap to ticks
                axis.min = Math.min(axis.min, ticks[0].v);
                axis.max = Math.max(axis.max, ticks[ticks.length - 1].v);
            }
        }

        function getEndpointPrecision(value, axis) {
            var canvas1 = Math.floor(axis.p2c(value)),
                canvas2 = axis.direction === "x" ? canvas1 + 1 : canvas1 - 1,
                point1 = axis.c2p(canvas1),
                point2 = axis.c2p(canvas2),
                precision = computeValuePrecision(point1, point2, axis.direction, 1);

            return precision;
        }

        function setEndpointTicks(axis) {
            if (axis.options.showTickLabels === 'all' || axis.options.showTickLabels === 'endpoints') {
                axis.ticks.unshift(newTick(axis.min, null, axis, 'min'));
                axis.ticks.push(newTick(axis.max, null, axis, 'max'));
            }
        }

        function draw() {
            surface.clear();

            executeHooks(hooks.drawBackground, [ctx]);

            var grid = options.grid;

            // draw background, if any
            if (grid.show && grid.backgroundColor) {
                drawBackground();
            }

            if (grid.show && !grid.aboveData) {
                drawGrid();
            }

            for (var i = 0; i < series.length; ++i) {
                executeHooks(hooks.drawSeries, [ctx, series[i]]);
                drawSeries(series[i]);
            }

            executeHooks(hooks.draw, [ctx]);

            if (grid.show && grid.aboveData) {
                drawGrid();
            }

            surface.render();

            // A draw implies that either the axes or data have changed, so we
            // should probably update the overlay highlights as well.
            triggerRedrawOverlay();
        }

        function extractRange(ranges, coord) {
            var axis, from, to, key, axes = allAxes();

            for (var i = 0; i < axes.length; ++i) {
                axis = axes[i];
                if (axis.direction === coord) {
                    key = coord + axis.n + "axis";
                    if (!ranges[key] && axis.n === 1) {
                        // support x1axis as xaxis
                        key = coord + "axis";
                    }

                    if (ranges[key]) {
                        from = ranges[key].from;
                        to = ranges[key].to;
                        break;
                    }
                }
            }

            // backwards-compat stuff - to be removed in future
            if (!ranges[key]) {
                axis = coord === "x" ? xaxes[0] : yaxes[0];
                from = ranges[coord + "1"];
                to = ranges[coord + "2"];
            }

            // auto-reverse as an added bonus
            if (from != null && to != null && from > to) {
                var tmp = from;
                from = to;
                to = tmp;
            }

            return {
                from: from,
                to: to,
                axis: axis
            };
        }

        function drawBackground() {
            ctx.save();
            ctx.translate(plotOffset.left, plotOffset.top);

            ctx.fillStyle = getColorOrGradient(options.grid.backgroundColor, plotHeight, 0, "rgba(255, 255, 255, 0)");
            ctx.fillRect(0, 0, plotWidth, plotHeight);
            ctx.restore();
        }

        function drawMarkings() {
            // draw markings
            var markings = options.grid.markings,
                axes;

            if (markings) {
                if ($.isFunction(markings)) {
                    axes = plot.getAxes();
                    // xmin etc. is backwards compatibility, to be
                    // removed in the future
                    axes.xmin = axes.xaxis.min;
                    axes.xmax = axes.xaxis.max;
                    axes.ymin = axes.yaxis.min;
                    axes.ymax = axes.yaxis.max;

                    markings = markings(axes);
                }

                var i;
                for (i = 0; i < markings.length; ++i) {
                    var m = markings[i],
                        xrange = extractRange(m, "x"),
                        yrange = extractRange(m, "y");

                    // fill in missing
                    if (xrange.from == null) {
                        xrange.from = xrange.axis.min;
                    }

                    if (xrange.to == null) {
                        xrange.to = xrange.axis.max;
                    }

                    if (yrange.from == null) {
                        yrange.from = yrange.axis.min;
                    }

                    if (yrange.to == null) {
                        yrange.to = yrange.axis.max;
                    }

                    // clip
                    if (xrange.to < xrange.axis.min || xrange.from > xrange.axis.max ||
                        yrange.to < yrange.axis.min || yrange.from > yrange.axis.max) {
                        continue;
                    }

                    xrange.from = Math.max(xrange.from, xrange.axis.min);
                    xrange.to = Math.min(xrange.to, xrange.axis.max);
                    yrange.from = Math.max(yrange.from, yrange.axis.min);
                    yrange.to = Math.min(yrange.to, yrange.axis.max);

                    var xequal = xrange.from === xrange.to,
                        yequal = yrange.from === yrange.to;

                    if (xequal && yequal) {
                        continue;
                    }

                    // then draw
                    xrange.from = Math.floor(xrange.axis.p2c(xrange.from));
                    xrange.to = Math.floor(xrange.axis.p2c(xrange.to));
                    yrange.from = Math.floor(yrange.axis.p2c(yrange.from));
                    yrange.to = Math.floor(yrange.axis.p2c(yrange.to));

                    if (xequal || yequal) {
                        var lineWidth = m.lineWidth || options.grid.markingsLineWidth,
                            subPixel = lineWidth % 2 ? 0.5 : 0;
                        ctx.beginPath();
                        ctx.strokeStyle = m.color || options.grid.markingsColor;
                        ctx.lineWidth = lineWidth;
                        if (xequal) {
                            ctx.moveTo(xrange.to + subPixel, yrange.from);
                            ctx.lineTo(xrange.to + subPixel, yrange.to);
                        } else {
                            ctx.moveTo(xrange.from, yrange.to + subPixel);
                            ctx.lineTo(xrange.to, yrange.to + subPixel);
                        }
                        ctx.stroke();
                    } else {
                        ctx.fillStyle = m.color || options.grid.markingsColor;
                        ctx.fillRect(xrange.from, yrange.to,
                            xrange.to - xrange.from,
                            yrange.from - yrange.to);
                    }
                }
            }
        }

        function findEdges(axis) {
            var box = axis.box,
                x = 0,
                y = 0;

            // find the edges
            if (axis.direction === "x") {
                x = 0;
                y = box.top - plotOffset.top + (axis.position === "top" ? box.height : 0);
            } else {
                y = 0;
                x = box.left - plotOffset.left + (axis.position === "left" ? box.width : 0) + axis.boxPosition.centerX;
            }

            return {
                x: x,
                y: y
            };
        };

        function alignPosition(lineWidth, pos) {
            return ((lineWidth % 2) !== 0) ? Math.floor(pos) + 0.5 : pos;
        };

        function drawTickBar(axis) {
            ctx.lineWidth = 1;
            var edges = findEdges(axis),
                x = edges.x,
                y = edges.y;

            // draw tick bar
            if (axis.show) {
                var xoff = 0,
                    yoff = 0;

                ctx.strokeStyle = axis.options.color;
                ctx.beginPath();
                if (axis.direction === "x") {
                    xoff = plotWidth + 1;
                } else {
                    yoff = plotHeight + 1;
                }

                if (axis.direction === "x") {
                    y = alignPosition(ctx.lineWidth, y);
                } else {
                    x = alignPosition(ctx.lineWidth, x);
                }

                ctx.moveTo(x, y);
                ctx.lineTo(x + xoff, y + yoff);
                ctx.stroke();
            }
        };

        function drawTickMarks(axis) {
            var t = axis.tickLength,
                minorTicks = axis.showMinorTicks,
                minorTicksNr = MINOR_TICKS_COUNT_CONSTANT,
                edges = findEdges(axis),
                x = edges.x,
                y = edges.y,
                i = 0;

            // draw major tick marks
            ctx.strokeStyle = axis.options.color;
            ctx.beginPath();

            for (i = 0; i < axis.ticks.length; ++i) {
                var v = axis.ticks[i].v,
                    xoff = 0,
                    yoff = 0,
                    xminor = 0,
                    yminor = 0,
                    j;

                if (!isNaN(v) && v >= axis.min && v <= axis.max) {
                    if (axis.direction === "x") {
                        x = axis.p2c(v);
                        yoff = t;

                        if (axis.position === "top") {
                            yoff = -yoff;
                        }
                    } else {
                        y = axis.p2c(v);
                        xoff = t;

                        if (axis.position === "left") {
                            xoff = -xoff;
                        }
                    }

                    if (axis.direction === "x") {
                        x = alignPosition(ctx.lineWidth, x);
                    } else {
                        y = alignPosition(ctx.lineWidth, y);
                    }

                    ctx.moveTo(x, y);
                    ctx.lineTo(x + xoff, y + yoff);
                }

                //draw minor tick marks
                if (minorTicks === true && i < axis.ticks.length - 1) {
                    var v1 = axis.ticks[i].v,
                        v2 = axis.ticks[i + 1].v,
                        step = (v2 - v1) / (minorTicksNr + 1);

                    for (j = 1; j <= minorTicksNr; j++) {
                        // compute minor tick position
                        if (axis.direction === "x") {
                            yminor = t / 2; // minor ticks are half length
                            x = alignPosition(ctx.lineWidth, axis.p2c(v1 + j * step))

                            if (axis.position === "top") {
                                yminor = -yminor;
                            }

                            // don't go over the plot borders
                            if ((x < 0) || (x > plotWidth)) {
                                continue;
                            }
                        } else {
                            xminor = t / 2; // minor ticks are half length
                            y = alignPosition(ctx.lineWidth, axis.p2c(v1 + j * step));

                            if (axis.position === "left") {
                                xminor = -xminor;
                            }

                            // don't go over the plot borders
                            if ((y < 0) || (y > plotHeight)) {
                                continue;
                            }
                        }

                        ctx.moveTo(x, y);
                        ctx.lineTo(x + xminor, y + yminor);
                    }
                }
            }

            ctx.stroke();
        };

        function drawGridLines(axis) {
            // check if the line will be overlapped with a border
            var overlappedWithBorder = function (value) {
                var bw = options.grid.borderWidth;
                return (((typeof bw === "object" && bw[axis.position] > 0) || bw > 0) && (value === axis.min || value === axis.max));
            };

            ctx.strokeStyle = options.grid.tickColor;
            ctx.beginPath();
            var i;
            for (i = 0; i < axis.ticks.length; ++i) {
                var v = axis.ticks[i].v,
                    xoff = 0,
                    yoff = 0,
                    x = 0,
                    y = 0;

                if (isNaN(v) || v < axis.min || v > axis.max) continue;

                // skip those lying on the axes if we got a border
                if (overlappedWithBorder(v)) continue;

                if (axis.direction === "x") {
                    x = axis.p2c(v);
                    y = plotHeight;
                    yoff = -plotHeight;
                } else {
                    x = 0;
                    y = axis.p2c(v);
                    xoff = plotWidth;
                }

                if (axis.direction === "x") {
                    x = alignPosition(ctx.lineWidth, x);
                } else {
                    y = alignPosition(ctx.lineWidth, y);
                }

                ctx.moveTo(x, y);
                ctx.lineTo(x + xoff, y + yoff);
            }

            ctx.stroke();
        };

        function drawBorder() {
            // If either borderWidth or borderColor is an object, then draw the border
            // line by line instead of as one rectangle
            var bw = options.grid.borderWidth,
                bc = options.grid.borderColor;

            if (typeof bw === "object" || typeof bc === "object") {
                if (typeof bw !== "object") {
                    bw = {
                        top: bw,
                        right: bw,
                        bottom: bw,
                        left: bw
                    };
                }
                if (typeof bc !== "object") {
                    bc = {
                        top: bc,
                        right: bc,
                        bottom: bc,
                        left: bc
                    };
                }

                if (bw.top > 0) {
                    ctx.strokeStyle = bc.top;
                    ctx.lineWidth = bw.top;
                    ctx.beginPath();
                    ctx.moveTo(0 - bw.left, 0 - bw.top / 2);
                    ctx.lineTo(plotWidth, 0 - bw.top / 2);
                    ctx.stroke();
                }

                if (bw.right > 0) {
                    ctx.strokeStyle = bc.right;
                    ctx.lineWidth = bw.right;
                    ctx.beginPath();
                    ctx.moveTo(plotWidth + bw.right / 2, 0 - bw.top);
                    ctx.lineTo(plotWidth + bw.right / 2, plotHeight);
                    ctx.stroke();
                }

                if (bw.bottom > 0) {
                    ctx.strokeStyle = bc.bottom;
                    ctx.lineWidth = bw.bottom;
                    ctx.beginPath();
                    ctx.moveTo(plotWidth + bw.right, plotHeight + bw.bottom / 2);
                    ctx.lineTo(0, plotHeight + bw.bottom / 2);
                    ctx.stroke();
                }

                if (bw.left > 0) {
                    ctx.strokeStyle = bc.left;
                    ctx.lineWidth = bw.left;
                    ctx.beginPath();
                    ctx.moveTo(0 - bw.left / 2, plotHeight + bw.bottom);
                    ctx.lineTo(0 - bw.left / 2, 0);
                    ctx.stroke();
                }
            } else {
                ctx.lineWidth = bw;
                ctx.strokeStyle = options.grid.borderColor;
                ctx.strokeRect(-bw / 2, -bw / 2, plotWidth + bw, plotHeight + bw);
            }
        };

        function drawGrid() {
            var axes, bw;

            ctx.save();
            ctx.translate(plotOffset.left, plotOffset.top);

            drawMarkings();

            axes = allAxes();
            bw = options.grid.borderWidth;

            for (var j = 0; j < axes.length; ++j) {
                var axis = axes[j];

                if (!axis.show) {
                    continue;
                }

                drawTickBar(axis);
                if (axis.showTicks === true) {
                    drawTickMarks(axis);
                }

                if (axis.gridLines === true) {
                    drawGridLines(axis, bw);
                }
            }

            // draw border
            if (bw) {
                drawBorder();
            }

            ctx.restore();
        }

        function drawAxisLabels() {
            $.each(allAxes(), function(_, axis) {
                var box = axis.box,
                    legacyStyles = axis.direction + "Axis " + axis.direction + axis.n + "Axis",
                    layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + legacyStyles,
                    font = axis.options.font || "flot-tick-label tickLabel",
                    i, x, y, halign, valign, info,
                    nullBox = {x: NaN, y: NaN, width: NaN, height: NaN}, newLabelBox, labelBoxes = [],
                    overlapping = function(x11, y11, x12, y12, x21, y21, x22, y22) {
                        return ((x11 <= x21 && x21 <= x12) || (x21 <= x11 && x11 <= x22)) &&
                               ((y11 <= y21 && y21 <= y12) || (y21 <= y11 && y11 <= y22));
                    },
                    overlapsOtherLabels = function(newLabelBox, previousLabelBoxes) {
                        return previousLabelBoxes.some(function(labelBox) {
                            return overlapping(
                                newLabelBox.x, newLabelBox.y, newLabelBox.x + newLabelBox.width, newLabelBox.y + newLabelBox.height,
                                labelBox.x, labelBox.y, labelBox.x + labelBox.width, labelBox.y + labelBox.height);
                        });
                    },
                    drawAxisLabel = function (tick, labelBoxes) {
                        if (!tick || !tick.label || tick.v < axis.min || tick.v > axis.max) {
                            return nullBox;
                        }

                        info = surface.getTextInfo(layer, tick.label, font);

                        if (axis.direction === "x") {
                            halign = "center";
                            x = plotOffset.left + axis.p2c(tick.v);
                            if (axis.position === "bottom") {
                                y = box.top + box.padding - axis.boxPosition.centerY;
                            } else {
                                y = box.top + box.height - box.padding + axis.boxPosition.centerY;
                                valign = "bottom";
                            }
                            newLabelBox = {x: x - info.width / 2, y: y, width: info.width, height: info.height}
                        } else {
                            valign = "middle";
                            y = plotOffset.top + axis.p2c(tick.v);
                            if (axis.position === "left") {
                                x = box.left + box.width - box.padding - axis.boxPosition.centerX;
                                halign = "right";
                            } else {
                                x = box.left + box.padding + axis.boxPosition.centerX;
                            }
                            newLabelBox = {x: x, y: y - info.height / 2, width: info.width, height: info.height}
                        }

                        if (overlapsOtherLabels(newLabelBox, labelBoxes)) {
                            return nullBox;
                        }

                        surface.addText(layer, x, y, tick.label, font, null, null, halign, valign);

                        return newLabelBox;
                    };

                // Remove text before checking for axis.show and ticks.length;
                // otherwise plugins, like flot-tickrotor, that draw their own
                // tick labels will end up with both theirs and the defaults.

                surface.removeText(layer);

                executeHooks(hooks.drawAxis, [axis, surface]);

                if (!axis.show) {
                    return;
                }

                switch (axis.options.showTickLabels) {
                    case 'none':
                        break;
                    case 'endpoints':
                        labelBoxes.push(drawAxisLabel(axis.ticks[0], labelBoxes));
                        labelBoxes.push(drawAxisLabel(axis.ticks[axis.ticks.length - 1], labelBoxes));
                        break;
                    case 'major':
                        labelBoxes.push(drawAxisLabel(axis.ticks[0], labelBoxes));
                        labelBoxes.push(drawAxisLabel(axis.ticks[axis.ticks.length - 1], labelBoxes));
                        for (i = 1; i < axis.ticks.length - 1; ++i) {
                            labelBoxes.push(drawAxisLabel(axis.ticks[i], labelBoxes));
                        }
                        break;
                    case 'all':
                        labelBoxes.push(drawAxisLabel(axis.ticks[0], []));
                        labelBoxes.push(drawAxisLabel(axis.ticks[axis.ticks.length - 1], labelBoxes));
                        for (i = 1; i < axis.ticks.length - 1; ++i) {
                            labelBoxes.push(drawAxisLabel(axis.ticks[i], labelBoxes));
                        }
                        break;
                }
            });
        }

        function drawSeries(series) {
            if (series.lines.show) {
                $.plot.drawSeries.drawSeriesLines(series, ctx, plotOffset, plotWidth, plotHeight, plot.drawSymbol, getColorOrGradient);
            }

            if (series.bars.show) {
                $.plot.drawSeries.drawSeriesBars(series, ctx, plotOffset, plotWidth, plotHeight, plot.drawSymbol, getColorOrGradient);
            }

            if (series.points.show) {
                $.plot.drawSeries.drawSeriesPoints(series, ctx, plotOffset, plotWidth, plotHeight, plot.drawSymbol, getColorOrGradient);
            }
        }

        function computeRangeForDataSeries(series, force, isValid) {
            var points = series.datapoints.points,
                ps = series.datapoints.pointsize,
                format = series.datapoints.format,
                topSentry = Number.POSITIVE_INFINITY,
                bottomSentry = Number.NEGATIVE_INFINITY,
                fakeInfinity = Number.MAX_VALUE,
                range = {
                    xmin: topSentry,
                    ymin: topSentry,
                    xmax: bottomSentry,
                    ymax: bottomSentry
                };

            for (var j = 0; j < points.length; j += ps) {
                if (points[j] === null) {
                    continue;
                }

                if (typeof (isValid) === 'function' && !isValid(points[j])) {
                    continue;
                }

                for (var m = 0; m < ps; ++m) {
                    var val = points[j + m],
                        f = format[m];
                    if (f === null || f === undefined) {
                        continue
                    }

                    if ((!force && !f.computeRange) || val === fakeInfinity || val === -fakeInfinity) {
                        continue;
                    }

                    if (f.x === true) {
                        if (val < range.xmin) {
                            range.xmin = val;
                        }

                        if (val > range.xmax) {
                            range.xmax = val;
                        }
                    }

                    if (f.y === true) {
                        if (val < range.ymin) {
                            range.ymin = val;
                        }

                        if (val > range.ymax) {
                            range.ymax = val;
                        }
                    }
                }
            }

            return range;
        };

        function adjustSeriesDataRange(series, range) {
            if (series.bars.show) {
                // make sure we got room for the bar on the dancing floor
                var delta;

                switch (series.bars.align) {
                    case "left":
                        delta = 0;
                        break;
                    case "right":
                        delta = -series.bars.barWidth;
                        break;
                    default:
                        delta = -series.bars.barWidth / 2;
                }

                range.xmin += delta;
                range.xmax += delta + series.bars.barWidth;
            }

            if ((series.bars.show && series.bars.zero) || (series.lines.show && series.lines.zero)) {
                var ps = series.datapoints.pointsize;

                // make sure the 0 point is included in the computed y range when requested
                if (ps <= 2) {
                    /*if ps > 0 the points were already taken into account for autoscale */
                    range.ymin = Math.min(0, range.ymin);
                    range.ymax = Math.max(0, range.ymax);
                }
            }

            return range;
        };

        // returns the data item the mouse is over, or null if none is found
        function findNearbyItem(mouseX, mouseY, seriesFilter, radius, computeDistance) {
            var maxDistance = radius,
                smallestDistance = maxDistance * maxDistance + 1,
                item = null,
                i, j, ps;

            for (i = series.length - 1; i >= 0; --i) {
                if (!seriesFilter(i)) continue;

                var s = series[i],
                    x, y,
                    axisx = s.xaxis,
                    axisy = s.yaxis,
                    points = s.datapoints.points,
                    mx = axisx.c2p(mouseX), // precompute some stuff to make the loop faster
                    my = axisy.c2p(mouseY),
                    maxx = maxDistance / axisx.scale,
                    maxy = maxDistance / axisy.scale;

                ps = s.datapoints.pointsize;
                // with inverse transforms, we can't use the maxx/maxy
                // optimization, sadly
                if (axisx.options.inverseTransform) {
                    maxx = Number.MAX_VALUE;
                }

                if (axisy.options.inverseTransform) {
                    maxy = Number.MAX_VALUE;
                }

                if (s.lines.show || s.points.show) {
                    for (j = 0; j < points.length; j += ps) {
                        x = points[j];
                        y = points[j + 1];
                        if (x == null) continue;

                        // For points and lines, the cursor must be within a
                        // certain distance to the data point
                        if (x - mx > maxx || x - mx < -maxx ||
                            y - my > maxy || y - my < -maxy) {
                            continue;
                        }

                        // We have to calculate distances in pixels, not in
                        // data units, because the scales of the axes may be different
                        var dx = Math.abs(axisx.p2c(x) - mouseX),
                            dy = Math.abs(axisy.p2c(y) - mouseY),
                            dist = computeDistance ? computeDistance(dx, dy) : dx * dx + dy * dy;

                        // use <= to ensure last point takes precedence
                        // (last generally means on top of)
                        if (dist < smallestDistance) {
                            smallestDistance = dist;
                            item = [i, j / ps];
                        }
                    }
                }

                if (s.bars.show && !item) {
                    // no other point can be nearby
                    var barLeft, barRight;

                    switch (s.bars.align) {
                        case "left":
                            barLeft = 0;
                            break;
                        case "right":
                            barLeft = -s.bars.barWidth;
                            break;
                        default:
                            barLeft = -s.bars.barWidth / 2;
                    }

                    barRight = barLeft + s.bars.barWidth;

                    for (j = 0; j < points.length; j += ps) {
                        x = points[j];
                        y = points[j + 1];
                        var b = points[j + 2];
                        if (x == null) continue;

                        // for a bar graph, the cursor must be inside the bar
                        if (mx >= x + barLeft && mx <= x + barRight &&
                                my >= Math.min(b, y) && my <= Math.max(b, y)) {
                            item = [i, j / ps];
                        }
                    }
                }
            }

            if (item) {
                i = item[0];
                j = item[1];
                ps = series[i].datapoints.pointsize;

                return {
                    datapoint: series[i].datapoints.points.slice(j * ps, (j + 1) * ps),
                    dataIndex: j,
                    series: series[i],
                    seriesIndex: i
                };
            }

            return null;
        }

        function onMouseMove(e) {
            if (options.grid.hoverable) {
                triggerClickHoverEvent("plothover", e,
                    function(i) {
                        return series[i]["hoverable"] !== false;
                    });
            }
        }

        function onMouseLeave(e) {
            if (options.grid.hoverable) {
                triggerClickHoverEvent("plothover", e,
                    function(i) {
                        return false;
                    });
            }
        }

        function onClick(e) {
            triggerClickHoverEvent("plotclick", e,
                function(i) {
                    return series[i]["clickable"] !== false;
                });
        }

        // trigger click or hover event (they send the same parameters
        // so we share their code)
        function triggerClickHoverEvent(eventname, event, seriesFilter) {
            var offset = eventHolder.offset(),
                canvasX = event.pageX - offset.left - plotOffset.left,
                canvasY = event.pageY - offset.top - plotOffset.top,
                pos = canvasToCartesianAxisCoords({
                    left: canvasX,
                    top: canvasY
                });

            pos.pageX = event.pageX;
            pos.pageY = event.pageY;

            var item = findNearbyItem(canvasX, canvasY, seriesFilter, options.grid.mouseActiveRadius);

            if (item) {
                // fill in mouse pos for any listeners out there
                item.pageX = parseInt(item.series.xaxis.p2c(item.datapoint[0]) + offset.left + plotOffset.left, 10);
                item.pageY = parseInt(item.series.yaxis.p2c(item.datapoint[1]) + offset.top + plotOffset.top, 10);
            }

            if (options.grid.autoHighlight) {
                // clear auto-highlights
                for (var i = 0; i < highlights.length; ++i) {
                    var h = highlights[i];
                    if (h.auto === eventname &&
                        !(item && h.series === item.series &&
                            h.point[0] === item.datapoint[0] &&
                            h.point[1] === item.datapoint[1])) {
                        unhighlight(h.series, h.point);
                    }
                }

                if (item) {
                    highlight(item.series, item.datapoint, eventname);
                }
            }

            placeholder.trigger(eventname, [pos, item]);
        }

        function triggerRedrawOverlay() {
            var t = options.interaction.redrawOverlayInterval;
            if (t === -1) { // skip event queue
                drawOverlay();
                return;
            }

            if (!redrawTimeout) {
                redrawTimeout = setTimeout(drawOverlay, t);
            }
        }

        function drawOverlay() {
            redrawTimeout = null;

            if (!octx) {
                return;
            }
            // draw highlights
            octx.save();
            overlay.clear();
            octx.translate(plotOffset.left, plotOffset.top);

            var i, hi;
            for (i = 0; i < highlights.length; ++i) {
                hi = highlights[i];

                if (hi.series.bars.show) drawBarHighlight(hi.series, hi.point);
                else drawPointHighlight(hi.series, hi.point);
            }
            octx.restore();

            executeHooks(hooks.drawOverlay, [octx, overlay]);
        }

        function highlight(s, point, auto) {
            if (typeof s === "number") {
                s = series[s];
            }

            if (typeof point === "number") {
                var ps = s.datapoints.pointsize;
                point = s.datapoints.points.slice(ps * point, ps * (point + 1));
            }

            var i = indexOfHighlight(s, point);
            if (i === -1) {
                highlights.push({
                    series: s,
                    point: point,
                    auto: auto
                });

                triggerRedrawOverlay();
            } else if (!auto) {
                highlights[i].auto = false;
            }
        }

        function unhighlight(s, point) {
            if (s == null && point == null) {
                highlights = [];
                triggerRedrawOverlay();
                return;
            }

            if (typeof s === "number") {
                s = series[s];
            }

            if (typeof point === "number") {
                var ps = s.datapoints.pointsize;
                point = s.datapoints.points.slice(ps * point, ps * (point + 1));
            }

            var i = indexOfHighlight(s, point);
            if (i !== -1) {
                highlights.splice(i, 1);

                triggerRedrawOverlay();
            }
        }

        function indexOfHighlight(s, p) {
            for (var i = 0; i < highlights.length; ++i) {
                var h = highlights[i];
                if (h.series === s &&
                    h.point[0] === p[0] &&
                    h.point[1] === p[1]) {
                    return i;
                }
            }

            return -1;
        }

        function drawPointHighlight(series, point) {
            var x = point[0],
                y = point[1],
                axisx = series.xaxis,
                axisy = series.yaxis,
                highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor : $.color.parse(series.color).scale('a', 0.5).toString();

            if (x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max) {
                return;
            }

            var pointRadius = series.points.radius + series.points.lineWidth / 2;
            octx.lineWidth = pointRadius;
            octx.strokeStyle = highlightColor;
            var radius = 1.5 * pointRadius;
            x = axisx.p2c(x);
            y = axisy.p2c(y);

            octx.beginPath();
            var symbol = series.points.symbol;
            if (symbol === 'circle') {
                octx.arc(x, y, radius, 0, 2 * Math.PI, false);
            } else if (typeof symbol === 'string' && plot.drawSymbol && plot.drawSymbol[symbol]) {
                plot.drawSymbol[symbol](octx, x, y, radius, false);
            }

            octx.closePath();
            octx.stroke();
        }

        function drawBarHighlight(series, point) {
            var highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor : $.color.parse(series.color).scale('a', 0.5).toString(),
                fillStyle = highlightColor,
                barLeft;

            switch (series.bars.align) {
                case "left":
                    barLeft = 0;
                    break;
                case "right":
                    barLeft = -series.bars.barWidth;
                    break;
                default:
                    barLeft = -series.bars.barWidth / 2;
            }

            octx.lineWidth = series.bars.lineWidth;
            octx.strokeStyle = highlightColor;

            $.plot.drawSeries.drawBar(point[0], point[1], point[2] || 0, barLeft, barLeft + series.bars.barWidth,
                function() {
                    return fillStyle;
                }, series.xaxis, series.yaxis, octx, series.bars.lineWidth);
        }

        function getColorOrGradient(spec, bottom, top, defaultColor) {
            if (typeof spec === "string") {
                return spec;
            } else {
                // assume this is a gradient spec; IE currently only
                // supports a simple vertical gradient properly, so that's
                // what we support too
                var gradient = ctx.createLinearGradient(0, top, 0, bottom);

                for (var i = 0, l = spec.colors.length; i < l; ++i) {
                    var c = spec.colors[i];
                    if (typeof c !== "string") {
                        var co = $.color.parse(defaultColor);
                        if (c.brightness != null) {
                            co = co.scale('rgb', c.brightness);
                        }

                        if (c.opacity != null) {
                            co.a *= c.opacity;
                        }

                        c = co.toString();
                    }
                    gradient.addColorStop(i / (l - 1), c);
                }

                return gradient;
            }
        }
    }

    // Add the plot function to the top level of the jQuery object

    $.plot = function(placeholder, data, options) {
        var plot = new Plot($(placeholder), data, options, $.plot.plugins);
        return plot;
    };

    $.plot.version = "0.8.3";

    $.plot.plugins = [];

    // Also add the plot function as a chainable property

    $.fn.plot = function(data, options) {
        return this.each(function() {
            $.plot(this, data, options);
        });
    };

    $.plot.saturated = saturated;

    // round to nearby lower multiple of base
    function floorInBase(n, base) {
        return base * Math.floor(n / base);
    }
})(jQuery);

(function($) {
    "use strict";

    function DrawSeries() {
        function plotLine(datapoints, xoffset, yoffset, axisx, axisy, ctx) {
            var points = datapoints.points,
                ps = datapoints.pointsize,
                prevx = null,
                prevy = null;
            var x1 = 0.0,
                y1 = 0.0,
                x2 = 0.0,
                y2 = 0.0,
                i = 0;

            ctx.beginPath();
            for (i = ps; i < points.length; i += ps) {
                x1 = points[i - ps];
                y1 = points[i - ps + 1];
                x2 = points[i];
                y2 = points[i + 1];

                if (x1 === null || x2 === null) {
                    continue;
                }

                // clip with ymin
                if (y1 <= y2 && y1 < axisy.min) {
                    if (y2 < axisy.min) {
                        // line segment is outside
                        continue;
                    }
                    // compute new intersection point
                    x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
                    y1 = axisy.min;
                } else if (y2 <= y1 && y2 < axisy.min) {
                    if (y1 < axisy.min) {
                        continue;
                    }

                    x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
                    y2 = axisy.min;
                }

                // clip with ymax
                if (y1 >= y2 && y1 > axisy.max) {
                    if (y2 > axisy.max) {
                        continue;
                    }

                    x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
                    y1 = axisy.max;
                } else if (y2 >= y1 && y2 > axisy.max) {
                    if (y1 > axisy.max) {
                        continue;
                    }

                    x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
                    y2 = axisy.max;
                }

                // clip with xmin
                if (x1 <= x2 && x1 < axisx.min) {
                    if (x2 < axisx.min) {
                        continue;
                    }

                    y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
                    x1 = axisx.min;
                } else if (x2 <= x1 && x2 < axisx.min) {
                    if (x1 < axisx.min) {
                        continue;
                    }

                    y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
                    x2 = axisx.min;
                }

                // clip with xmax
                if (x1 >= x2 && x1 > axisx.max) {
                    if (x2 > axisx.max) {
                        continue;
                    }

                    y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
                    x1 = axisx.max;
                } else if (x2 >= x1 && x2 > axisx.max) {
                    if (x1 > axisx.max) {
                        continue;
                    }

                    y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
                    x2 = axisx.max;
                }

                if (x1 !== prevx || y1 !== prevy) {
                    ctx.moveTo(axisx.p2c(x1) + xoffset, axisy.p2c(y1) + yoffset);
                }

                prevx = x2;
                prevy = y2;
                ctx.lineTo(axisx.p2c(x2) + xoffset, axisy.p2c(y2) + yoffset);
            }
            ctx.stroke();
        }

        function plotLineArea(datapoints, axisx, axisy, fillTowards, ctx) {
            var points = datapoints.points,
                ps = datapoints.pointsize,
                bottom = fillTowards > axisy.min ? Math.min(axisy.max, fillTowards) : axisy.min,
                i = 0,
                ypos = 1,
                areaOpen = false,
                segmentStart = 0,
                segmentEnd = 0;

            // we process each segment in two turns, first forward
            // direction to sketch out top, then once we hit the
            // end we go backwards to sketch the bottom
            while (true) {
                if (ps > 0 && i > points.length + ps) {
                    break;
                }

                i += ps; // ps is negative if going backwards

                var x1 = points[i - ps],
                    y1 = points[i - ps + ypos],
                    x2 = points[i],
                    y2 = points[i + ypos];

                if (ps === -2) {
                    /* going backwards and no value for the bottom provided in the series*/
                    y1 = y2 = bottom;
                }

                if (areaOpen) {
                    if (ps > 0 && x1 != null && x2 == null) {
                        // at turning point
                        segmentEnd = i;
                        ps = -ps;
                        ypos = 2;
                        continue;
                    }

                    if (ps < 0 && i === segmentStart + ps) {
                        // done with the reverse sweep
                        ctx.fill();
                        areaOpen = false;
                        ps = -ps;
                        i = segmentStart = segmentEnd + ps;
                        continue;
                    }
                }

                if (x1 == null || x2 == null) {
                    continue;
                }

                // clip x values

                // clip with xmin
                if (x1 <= x2 && x1 < axisx.min) {
                    if (x2 < axisx.min) {
                        continue;
                    }

                    y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
                    x1 = axisx.min;
                } else if (x2 <= x1 && x2 < axisx.min) {
                    if (x1 < axisx.min) {
                        continue;
                    }

                    y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
                    x2 = axisx.min;
                }

                // clip with xmax
                if (x1 >= x2 && x1 > axisx.max) {
                    if (x2 > axisx.max) {
                        continue;
                    }

                    y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
                    x1 = axisx.max;
                } else if (x2 >= x1 && x2 > axisx.max) {
                    if (x1 > axisx.max) {
                        continue;
                    }

                    y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
                    x2 = axisx.max;
                }

                if (!areaOpen) {
                    // open area
                    ctx.beginPath();
                    ctx.moveTo(axisx.p2c(x1), axisy.p2c(bottom));
                    areaOpen = true;
                }

                // now first check the case where both is outside
                if (y1 >= axisy.max && y2 >= axisy.max) {
                    ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max));
                    ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max));
                    continue;
                } else if (y1 <= axisy.min && y2 <= axisy.min) {
                    ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.min));
                    ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.min));
                    continue;
                }

                // else it's a bit more complicated, there might
                // be a flat maxed out rectangle first, then a
                // triangular cutout or reverse; to find these
                // keep track of the current x values
                var x1old = x1,
                    x2old = x2;

                // clip the y values, without shortcutting, we
                // go through all cases in turn

                // clip with ymin
                if (y1 <= y2 && y1 < axisy.min && y2 >= axisy.min) {
                    x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
                    y1 = axisy.min;
                } else if (y2 <= y1 && y2 < axisy.min && y1 >= axisy.min) {
                    x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
                    y2 = axisy.min;
                }

                // clip with ymax
                if (y1 >= y2 && y1 > axisy.max && y2 <= axisy.max) {
                    x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
                    y1 = axisy.max;
                } else if (y2 >= y1 && y2 > axisy.max && y1 <= axisy.max) {
                    x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
                    y2 = axisy.max;
                }

                // if the x value was changed we got a rectangle
                // to fill
                if (x1 !== x1old) {
                    ctx.lineTo(axisx.p2c(x1old), axisy.p2c(y1));
                    // it goes to (x1, y1), but we fill that below
                }

                // fill triangular section, this sometimes result
                // in redundant points if (x1, y1) hasn't changed
                // from previous line to, but we just ignore that
                ctx.lineTo(axisx.p2c(x1), axisy.p2c(y1));
                ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));

                // fill the other rectangle if it's there
                if (x2 !== x2old) {
                    ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
                    ctx.lineTo(axisx.p2c(x2old), axisy.p2c(y2));
                }
            }
        }

        function drawSeriesLines(series, ctx, plotOffset, plotWidth, plotHeight, drawSymbol, getColorOrGradient) {
            ctx.save();
            ctx.translate(plotOffset.left, plotOffset.top);
            ctx.lineJoin = "round";

            if (series.lines.dashes && ctx.setLineDash) {
                ctx.setLineDash(series.lines.dashes);
            }

            var datapoints = {
                format: series.datapoints.format,
                points: series.datapoints.points,
                pointsize: series.datapoints.pointsize
            };

            if (series.decimate) {
                datapoints.points = series.decimate(series, series.xaxis.min, series.xaxis.max, plotWidth);
            }

            var lw = series.lines.lineWidth;

            ctx.lineWidth = lw;
            ctx.strokeStyle = series.color;
            var fillStyle = getFillStyle(series.lines, series.color, 0, plotHeight, getColorOrGradient);
            if (fillStyle) {
                ctx.fillStyle = fillStyle;
                plotLineArea(datapoints, series.xaxis, series.yaxis, series.lines.fillTowards || 0, ctx);
            }

            if (lw > 0) {
                plotLine(datapoints, 0, 0, series.xaxis, series.yaxis, ctx);
            }

            ctx.restore();
        }

        function drawSeriesPoints(series, ctx, plotOffset, plotWidth, plotHeight, drawSymbol, getColorOrGradient) {
            function drawCircle(ctx, x, y, radius, shadow, fill) {
                ctx.moveTo(x + radius, y);
                ctx.arc(x, y, radius, 0, shadow ? Math.PI : Math.PI * 2, false);
            }
            drawCircle.fill = true;
            function plotPoints(datapoints, radius, fill, offset, shadow, axisx, axisy, drawSymbolFn) {
                var points = datapoints.points,
                    ps = datapoints.pointsize;

                ctx.beginPath();
                for (var i = 0; i < points.length; i += ps) {
                    var x = points[i],
                        y = points[i + 1];
                    if (x == null || x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max) {
                        continue;
                    }

                    x = axisx.p2c(x);
                    y = axisy.p2c(y) + offset;

                    drawSymbolFn(ctx, x, y, radius, shadow, fill);
                }
                if (drawSymbolFn.fill && !shadow) {
                    ctx.fill();
                }
                ctx.stroke();
            }

            ctx.save();
            ctx.translate(plotOffset.left, plotOffset.top);

            var datapoints = {
                format: series.datapoints.format,
                points: series.datapoints.points,
                pointsize: series.datapoints.pointsize
            };

            if (series.decimatePoints) {
                datapoints.points = series.decimatePoints(series, series.xaxis.min, series.xaxis.max, plotWidth);
            }

            var lw = series.points.lineWidth,
                radius = series.points.radius,
                symbol = series.points.symbol,
                drawSymbolFn;

            if (symbol === 'circle') {
                drawSymbolFn = drawCircle;
            } else if (typeof symbol === 'string' && drawSymbol && drawSymbol[symbol]) {
                drawSymbolFn = drawSymbol[symbol];
            } else if (typeof drawSymbol === 'function') {
                drawSymbolFn = drawSymbol;
            }

            // If the user sets the line width to 0, we change it to a very
            // small value. A line width of 0 seems to force the default of 1.

            if (lw === 0) {
                lw = 0.0001;
            }

            ctx.lineWidth = lw;
            ctx.fillStyle = getFillStyle(series.points, series.color, null, null, getColorOrGradient);
            ctx.strokeStyle = series.color;
            plotPoints(datapoints, radius,
                true, 0, false,
                series.xaxis, series.yaxis, drawSymbolFn);
            ctx.restore();
        }

        function drawBar(x, y, b, barLeft, barRight, fillStyleCallback, axisx, axisy, c, lineWidth) {
            var left = x + barLeft,
                right = x + barRight,
                bottom = b, top = y,
                drawLeft, drawRight, drawTop, drawBottom = false,
                tmp;

            drawLeft = drawRight = drawTop = true;

            // account for negative bars
            if (top < bottom) {
                tmp = top;
                top = bottom;
                bottom = tmp;
                drawBottom = true;
                drawTop = false;
            }

            // clip
            if (right < axisx.min || left > axisx.max ||
                top < axisy.min || bottom > axisy.max) {
                return;
            }

            if (left < axisx.min) {
                left = axisx.min;
                drawLeft = false;
            }

            if (right > axisx.max) {
                right = axisx.max;
                drawRight = false;
            }

            if (bottom < axisy.min) {
                bottom = axisy.min;
                drawBottom = false;
            }

            if (top > axisy.max) {
                top = axisy.max;
                drawTop = false;
            }

            left = axisx.p2c(left);
            bottom = axisy.p2c(bottom);
            right = axisx.p2c(right);
            top = axisy.p2c(top);

            // fill the bar
            if (fillStyleCallback) {
                c.fillStyle = fillStyleCallback(bottom, top);
                c.fillRect(left, top, right - left, bottom - top)
            }

            // draw outline
            if (lineWidth > 0 && (drawLeft || drawRight || drawTop || drawBottom)) {
                c.beginPath();

                // FIXME: inline moveTo is buggy with excanvas
                c.moveTo(left, bottom);
                if (drawLeft) {
                    c.lineTo(left, top);
                } else {
                    c.moveTo(left, top);
                }

                if (drawTop) {
                    c.lineTo(right, top);
                } else {
                    c.moveTo(right, top);
                }

                if (drawRight) {
                    c.lineTo(right, bottom);
                } else {
                    c.moveTo(right, bottom);
                }

                if (drawBottom) {
                    c.lineTo(left, bottom);
                } else {
                    c.moveTo(left, bottom);
                }

                c.stroke();
            }
        }

        function drawSeriesBars(series, ctx, plotOffset, plotWidth, plotHeight, drawSymbol, getColorOrGradient) {
            function plotBars(datapoints, barLeft, barRight, fillStyleCallback, axisx, axisy) {
                var points = datapoints.points,
                    ps = datapoints.pointsize,
                    fillTowards = series.bars.fillTowards || 0,
                    bottom = fillTowards > axisy.min ? Math.min(axisy.max, fillTowards) : axisy.min;

                for (var i = 0; i < points.length; i += ps) {
                    if (points[i] == null) {
                        continue;
                    }

                    drawBar(points[i], points[i + 1], bottom, barLeft, barRight, fillStyleCallback, axisx, axisy, ctx, series.bars.lineWidth);
                }
            }

            ctx.save();
            ctx.translate(plotOffset.left, plotOffset.top);

            var datapoints = {
                format: series.datapoints.format,
                points: series.datapoints.points,
                pointsize: series.datapoints.pointsize
            };

            if (series.decimate) {
                datapoints.points = series.decimate(series, series.xaxis.min, series.xaxis.max, plotWidth);
            }

            ctx.lineWidth = series.bars.lineWidth;
            ctx.strokeStyle = series.color;

            computeBarWidth(series);

            var barLeft;

            switch (series.bars.align) {
                case "left":
                    barLeft = 0;
                    break;
                case "right":
                    barLeft = -series.bars.barWidth;
                    break;
                default:
                    barLeft = -series.bars.barWidth / 2;
            }

            var fillStyleCallback = series.bars.fill ? function(bottom, top) {
                return getFillStyle(series.bars, series.color, bottom, top, getColorOrGradient);
            } : null;

            plotBars(datapoints, barLeft, barLeft + series.bars.barWidth, fillStyleCallback, series.xaxis, series.yaxis);
            ctx.restore();
        }

        function computeBarWidth(series) {
            var pointsize = series.datapoints.pointsize, distance,
                minDistance = series.datapoints.points[pointsize] - series.datapoints.points[0] || 1;
            for (var j = pointsize; j < series.datapoints.points.length - pointsize; j += pointsize) {
                distance = Math.abs(series.datapoints.points[pointsize + j] - series.datapoints.points[j]);
                if (distance < minDistance) {
                    minDistance = distance;
                }
            }
            series.bars.barWidth = 0.8 * minDistance;
        }

        function getFillStyle(filloptions, seriesColor, bottom, top, getColorOrGradient) {
            var fill = filloptions.fill;
            if (!fill) {
                return null;
            }

            if (filloptions.fillColor) {
                return getColorOrGradient(filloptions.fillColor, bottom, top, seriesColor);
            }

            var c = $.color.parse(seriesColor);
            c.a = typeof fill === "number" ? fill : 0.4;
            c.normalize();
            return c.toString();
        }

        this.drawSeriesLines = drawSeriesLines;
        this.drawSeriesPoints = drawSeriesPoints;
        this.drawSeriesBars = drawSeriesBars;
        this.drawBar = drawBar;
    };

    $.plot.drawSeries = new DrawSeries();
})(jQuery);

(function ($) {
    'use strict';
    $.plot.uiConstants = {
        SNAPPING_CONSTANT: 20,
        PANHINT_LENGTH_CONSTANT: 10,
        MINOR_TICKS_COUNT_CONSTANT: 4,
        TICK_LENGTH_CONSTANT: 10
    };
})(jQuery);