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/*! Javascript plotting library for jQuery, v. 0.7.
 *
 * Released under the MIT license by IOLA, December 2007.
 *
 */

// first an inline dependency, jquery.colorhelpers.js, we inline it here
// for convenience

/* 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);
 *   $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)"
 *
 * Note that .scale() and .add() return the same modified object
 * instead of making a new one.
 *
 * V. 1.1: Fix error handling so e.g. parsing an empty string does
 * produce a color rather than just crashing.
 */
(function(B){B.color={};B.color.make=function(F,E,C,D){var G={};G.r=F||0;G.g=E||0;G.b=C||0;G.a=D!=null?D:1;G.add=function(J,I){for(var H=0;H<J.length;++H){G[J.charAt(H)]+=I}return G.normalize()};G.scale=function(J,I){for(var H=0;H<J.length;++H){G[J.charAt(H)]*=I}return G.normalize()};G.toString=function(){if(G.a>=1){return"rgb("+[G.r,G.g,G.b].join(",")+")"}else{return"rgba("+[G.r,G.g,G.b,G.a].join(",")+")"}};G.normalize=function(){function H(J,K,I){return K<J?J:(K>I?I:K)}G.r=H(0,parseInt(G.r),255);G.g=H(0,parseInt(G.g),255);G.b=H(0,parseInt(G.b),255);G.a=H(0,G.a,1);return G};G.clone=function(){return B.color.make(G.r,G.b,G.g,G.a)};return G.normalize()};B.color.extract=function(D,C){var E;do{E=D.css(C).toLowerCase();if(E!=""&&E!="transparent"){break}D=D.parent()}while(!B.nodeName(D.get(0),"body"));if(E=="rgba(0, 0, 0, 0)"){E="transparent"}return B.color.parse(E)};B.color.parse=function(F){var E,C=B.color.make;if(E=/rgb$\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*$/.exec(F)){return C(parseInt(E[1],10),parseInt(E[2],10),parseInt(E[3],10))}if(E=/rgba$\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*$/.exec(F)){return C(parseInt(E[1],10),parseInt(E[2],10),parseInt(E[3],10),parseFloat(E[4]))}if(E=/rgb$\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*$/.exec(F)){return C(parseFloat(E[1])*2.55,parseFloat(E[2])*2.55,parseFloat(E[3])*2.55)}if(E=/rgba$\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(F)){return C(parseFloat(E[1])*2.55,parseFloat(E[2])*2.55,parseFloat(E[3])*2.55,parseFloat(E[4]))}if(E=/#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(F)){return C(parseInt(E[1],16),parseInt(E[2],16),parseInt(E[3],16))}if(E=/#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(F)){return C(parseInt(E[1]+E[1],16),parseInt(E[2]+E[2],16),parseInt(E[3]+E[3],16))}var D=B.trim(F).toLowerCase();if(D=="transparent"){return C(255,255,255,0)}else{E=A[D]||[0,0,0];return C(E[0],E[1],E[2])}};var A={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 actual Flot code
(function($) {
    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"],
                legend: {
                    show: true,
                    noColumns: 1, // number of colums in legend table
                    labelFormatter: null, // fn: string -> string
                    labelBoxBorderColor: "#ccc", // border color for the little label boxes
                    container: null, // container (as jQuery object) to put legend in, null means default on top of graph
                    position: "ne", // position of default legend container within plot
                    margin: 5, // distance from grid edge to default legend container within plot
                    backgroundColor: null, // null means auto-detect
                    backgroundOpacity: 0.85, // set to 0 to avoid background
                    reversed: false //default to not reversed order
                },
                xaxis: {
                    show: null, // null = auto-detect, true = always, false = never
                    position: "bottom", // or "top"
                    mode: null, // null or "time"
                    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 auto-setting min/max
                    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
                    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 ticks, or "full" for whole line
                    alignTicksWithAxis: null, // axis number or null for no sync

// mode specific options
                    tickDecimals: null, // no. of decimals, null means auto
                    tickSize: null, // number or [number, "unit"]
                    minTickSize: null, // number or [number, "unit"]
                    monthNames: null, // list of names of months
                    timeformat: null, // format string to use
                    twelveHourClock: false // 12 or 24 time in time mode
                },
                yaxis: {
                    autoscaleMargin: 0.02,
                    position: "left" // or "right"
                },
                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: 2, // in pixels
                        fill: false,
                        fillColor: null,
                        steps: false
                    },
                    bars: {
                        show: false,
                        lineWidth: 2, // in pixels
                        barWidth: 1, // in units of the x axis
                        fill: true,
                        fillColor: null,
                        align: "left", // or "center"
                        horizontal: false
                    },
                    shadowSize: 3
                },
                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)"
                    labelMargin: 5, // in pixels
                    axisMargin: 8, // in pixels
                    borderWidth: 2, // 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
                },
                hooks: {}
            },
            canvas = 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},
            canvasWidth = 0, canvasHeight = 0,
            plotWidth = 0, plotHeight = 0,
            hooks = {
                processOptions: [],
                processRawData: [],
                processDatapoints: [],
                drawSeries: [],
                draw: [],
                bindEvents: [],
                drawOverlay: [],
                shutdown: []
            },
            plot = this;

// public functions
        plot.setData = setData;
        plot.setupGrid = setupGrid;
        plot.draw = draw;
        plot.getPlaceholder = function() { return placeholder; };
        plot.getCanvas = function() { return canvas; };
        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 = {}, i;
            $.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 = canvasToAxisCoords;
        plot.p2c = axisToCanvasCoords;
        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),
                top: parseInt(yaxes[axisNumber(point, "y") - 1].p2c(+point.y) + plotOffset.top)
            };
        };
        plot.shutdown = shutdown;
        plot.resize = function () {
            getCanvasDimensions();
            resizeCanvas(canvas);
            resizeCanvas(overlay);
        };

// public attributes
        plot.hooks = hooks;

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

function parseOptions(opts) {
            var i;

$.extend(true, options, opts);

if (options.xaxis.color == null)
                options.xaxis.color = options.grid.color;
            if (options.yaxis.color == null)
                options.yaxis.color = options.grid.color;

if (options.xaxis.tickColor == null) // backwards-compatibility
                options.xaxis.tickColor = options.grid.tickColor;
            if (options.yaxis.tickColor == null) // backwards-compatibility
                options.yaxis.tickColor = options.grid.tickColor;

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 in axes, copy at least always the
            // first as the rest of the code assumes it'll be there
            for (i = 0; i < Math.max(1, options.xaxes.length); ++i)
                options.xaxes[i] = $.extend(true, {}, options.xaxis, options.xaxes[i]);
            for (i = 0; i < Math.max(1, options.yaxes.length); ++i)
                options.yaxes[i] = $.extend(true, {}, options.yaxis, options.yaxes[i]);

// backwards compatibility, to be removed in future
            if (options.xaxis.noTicks && options.xaxis.ticks == null)
                options.xaxis.ticks = options.xaxis.noTicks;
            if (options.yaxis.noTicks && options.yaxis.ticks == null)
                options.yaxis.ticks = options.yaxis.noTicks;
            if (options.x2axis) {
                options.xaxes[1] = $.extend(true, {}, options.xaxis, options.x2axis);
                options.xaxes[1].position = "top";
            }
            if (options.y2axis) {
                options.yaxes[1] = $.extend(true, {}, options.yaxis, options.y2axis);
                options.yaxes[1].position = "right";
            }
            if (options.grid.coloredAreas)
                options.grid.markings = options.grid.coloredAreas;
            if (options.grid.coloredAreasColor)
                options.grid.markingsColor = options.grid.coloredAreasColor;
            if (options.lines)
                $.extend(true, options.series.lines, options.lines);
            if (options.points)
                $.extend(true, options.series.points, options.points);
            if (options.bars)
                $.extend(true, options.series.bars, options.bars);
            if (options.shadowSize != null)
                options.series.shadowSize = options.shadowSize;

// 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];

// 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) {
            series = parseData(d);
            fillInSeriesOptions();
            processData();
        }

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 $.grep(xaxes.concat(yaxes), function (a) { return a; });
        }

function canvasToAxisCoords(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;
        }

function axisToCanvasCoords(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 i;

// collect what we already got of colors
            var neededColors = series.length,
                usedColors = [],
                assignedColors = [];
            for (i = 0; i < series.length; ++i) {
                var sc = series[i].color;
                if (sc != null) {
                    --neededColors;
                    if (typeof sc == "number")
                        assignedColors.push(sc);
                    else
                        usedColors.push($.color.parse(series[i].color));
                }
            }

// we might need to generate more colors if higher indices
            // are assigned
            for (i = 0; i < assignedColors.length; ++i) {
                neededColors = Math.max(neededColors, assignedColors[i] + 1);
            }

// produce colors as needed
            var colors = [], variation = 0;
            i = 0;
            while (colors.length < neededColors) {
                var c;
                if (options.colors.length == i) // check degenerate case
                    c = $.color.make(100, 100, 100);
                else
                    c = $.color.parse(options.colors[i]);

// vary color if needed
                var sign = variation % 2 == 1 ? -1 : 1;
                c.scale('rgb', 1 + sign * Math.ceil(variation / 2) * 0.2)

// FIXME: if we're getting to close to something else,
                // we should probably skip this one
                colors.push(c);

++i;
                if (i >= options.colors.length) {
                    i = 0;
                    ++variation;
                }
            }

// fill in the options
            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;
                }

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

function processData() {
            var topSentry = Number.POSITIVE_INFINITY,
                bottomSentry = Number.NEGATIVE_INFINITY,
                fakeInfinity = Number.MAX_VALUE,
                i, j, k, m, length,
                s, points, ps, x, y, axis, val, f, p;

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

$.each(allAxes(), function (_, axis) {
                // init axis
                axis.datamin = topSentry;
                axis.datamax = bottomSentry;
                axis.used = false;
            });

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

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

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

var data = s.data, format = s.datapoints.format;

if (!format) {
                    format = [];
                    // find out how to copy
                    format.push({ x: true, number: true, required: true });
                    format.push({ y: true, number: true, required: true });

if (s.bars.show || (s.lines.show && s.lines.fill)) {
                        format.push({ y: true, number: true, required: false, defaultValue: 0 });
                        if (s.bars.horizontal) {
                            delete format[format.length - 1].y;
                            format[format.length - 1].x = true;
                        }
                    }

s.datapoints.format = format;
                }

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

s.datapoints.pointsize = format.length;

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

insertSteps = s.lines.show && s.lines.steps;
                s.xaxis.used = s.yaxis.used = true;

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.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;
                        }
                    }
                }
            }

// 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];
                points = s.datapoints.points,
                    ps = s.datapoints.pointsize;

var xmin = topSentry, ymin = topSentry,
                    xmax = bottomSentry, ymax = bottomSentry;

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

for (m = 0; m < ps; ++m) {
                        val = points[j + m];
                        f = format[m];
                        if (!f || val == fakeInfinity || val == -fakeInfinity)
                            continue;

if (f.x) {
                            if (val < xmin)
                                xmin = val;
                            if (val > xmax)
                                xmax = val;
                        }
                        if (f.y) {
                            if (val < ymin)
                                ymin = val;
                            if (val > ymax)
                                ymax = val;
                        }
                    }
                }

if (s.bars.show) {
                    // make sure we got room for the bar on the dancing floor
                    var delta = s.bars.align == "left" ? 0 : -s.bars.barWidth/2;
                    if (s.bars.horizontal) {
                        ymin += delta;
                        ymax += delta + s.bars.barWidth;
                    }
                    else {
                        xmin += delta;
                        xmax += delta + s.bars.barWidth;
                    }
                }

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

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

function makeCanvas(skipPositioning, cls) {
            var c = document.createElement('canvas');

if(typeof FlashCanvas != "undefined") {
                FlashCanvas.initElement(canvas);
            } else if (!c.getContext) { // excanvas hack
                //c = window.G_vmlCanvasManager.initElement(c);
                window.G_vmlCanvasManager.initElement(c);
                c.getContext('2d');
            }

c.className = cls;
            c.width = canvasWidth;
            c.height = canvasHeight;

if (!skipPositioning)
                $(c).css({ position: 'absolute', left: 0, top: 0 });

$(c).appendTo(placeholder);

// used for resetting in case we get replotted
            c.getContext("2d").save();

return c;
        }

function getCanvasDimensions() {
            canvasWidth = placeholder.width();
            canvasHeight = placeholder.height();

if (canvasWidth <= 0 || canvasHeight <= 0)
                throw "Invalid dimensions for plot, width = " + canvasWidth + ", height = " + canvasHeight;
        }

function resizeCanvas(c) {
            // resizing should reset the state (excanvas seems to be
            // buggy though)
            if (c.width != canvasWidth)
                c.width = canvasWidth;

if (c.height != canvasHeight)
                c.height = canvasHeight;

// so try to get back to the initial state (even if it's
            // gone now, this should be safe according to the spec)
            var cctx = c.getContext("2d");
            cctx.restore();

// and save again
            cctx.save();
        }

function setupCanvases() {
            var reused,
                existingCanvas = placeholder.children("canvas.base"),
                existingOverlay = placeholder.children("canvas.overlay");

if (existingCanvas.length == 0 || existingOverlay == 0) {
                // init everything

placeholder.html(""); // make sure placeholder is clear

placeholder.css({ padding: 0 }); // padding messes up the positioning

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

getCanvasDimensions();

canvas = makeCanvas(true, "base");
                overlay = makeCanvas(false, "overlay"); // overlay canvas for interactive features

reused = false;
            }
            else {
                // reuse existing elements

canvas = existingCanvas.get(0);
                overlay = existingOverlay.get(0);

reused = true;
            }

ctx = canvas.getContext("2d");
            octx = overlay.getContext("2d");

// we include the canvas in the event holder too, because IE 7
            // sometimes has trouble with the stacking order
            eventHolder = $([overlay, canvas]);

if (reused) {
                // run shutdown in the old plot object
                placeholder.data("plot").shutdown();

// reset reused canvases
                plot.resize();

// make sure overlay pixels are cleared (canvas is cleared when we redraw)
                octx.clearRect(0, 0, canvasWidth, canvasHeight);

// then whack any remaining obvious garbage left
                eventHolder.unbind();
                placeholder.children().not([canvas, overlay]).remove();
            }

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

function bindEvents() {
            // bind events
            if (options.grid.hoverable) {
                eventHolder.mousemove(onMouseMove);
                eventHolder.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, i, ticks = axis.ticks || [], labels = [],
                l, w = opts.labelWidth, h = opts.labelHeight, dummyDiv;

function makeDummyDiv(labels, width) {
                return $('<div style="position:absolute;top:-10000px;' + width + 'font-size:smaller">' +
                    '<div class="' + axis.direction + 'Axis ' + axis.direction + axis.n + 'Axis">'
                    + labels.join("") + '</div></div>')
                    .appendTo(placeholder);
            }

if (axis.direction == "x") {
                // to avoid measuring the widths of the labels (it's slow), we
                // construct fixed-size boxes and put the labels inside
                // them, we don't need the exact figures and the
                // fixed-size box content is easy to center
                if (w == null)
                    w = Math.floor(canvasWidth / (ticks.length > 0 ? ticks.length : 1));

// measure x label heights
                if (h == null) {
                    labels = [];
                    for (i = 0; i < ticks.length; ++i) {
                        l = ticks[i].label;
                        if (l)
                            labels.push('<div class="tickLabel" style="float:left;width:' + w + 'px">' + l + '</div>');
                    }

if (labels.length > 0) {
                        // stick them all in the same div and measure
                        // collective height
                        labels.push('<div style="clear:left"></div>');
                        dummyDiv = makeDummyDiv(labels, "width:10000px;");
                        h = dummyDiv.height();
                        dummyDiv.remove();
                    }
                }
            }
            else if (w == null || h == null) {
                // calculate y label dimensions
                for (i = 0; i < ticks.length; ++i) {
                    l = ticks[i].label;
                    if (l)
                        labels.push('<div class="tickLabel">' + l + '</div>');
                }

if (labels.length > 0) {
                    dummyDiv = makeDummyDiv(labels, "");
                    if (w == null)
                        w = dummyDiv.children().width();
                    if (h == null)
                        h = dummyDiv.find("div.tickLabel").height();
                    dummyDiv.remove();
                }
            }

if (w == null)
                w = 0;
            if (h == null)
                h = 0;

axis.labelWidth = w;
            axis.labelHeight = h;
        }

function allocateAxisBoxFirstPhase(axis) {
            // find the bounding box of the axis by looking at label
            // widths/heights and ticks, make room by diminishing the
            // plotOffset

var lw = axis.labelWidth,
                lh = axis.labelHeight,
                pos = axis.options.position,
                tickLength = axis.options.tickLength,
                axismargin = options.grid.axisMargin,
                padding = options.grid.labelMargin,
                all = axis.direction == "x" ? xaxes : yaxes,
                index;

// determine axis margin
            var samePosition = $.grep(all, function (a) {
                return a && a.options.position == pos && a.reserveSpace;
            });
            if ($.inArray(axis, samePosition) == samePosition.length - 1)
                axismargin = 0; // outermost

// determine tick length - if we're innermost, we can use "full"
            if (tickLength == null)
                tickLength = "full";

var sameDirection = $.grep(all, function (a) {
                return a && a.reserveSpace;
            });

var innermost = $.inArray(axis, sameDirection) == 0;
            if (!innermost && tickLength == "full")
                tickLength = 5;

if (!isNaN(+tickLength))
                padding += +tickLength;

// compute box
            if (axis.direction == "x") {
                lh += padding;

if (pos == "bottom") {
                    plotOffset.bottom += lh + axismargin;
                    axis.box = { top: canvasHeight - 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: canvasWidth - plotOffset.right, width: lw };
                }
            }

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

function setupGrid() {
            var i, axes = allAxes();

// first calculate the plot and axis box dimensions

$.each(axes, function (_, axis) {
                axis.show = axis.options.show;
                if (axis.show == null)
                    axis.show = axis.used; // by default an axis is visible if it's got data

axis.reserveSpace = axis.show || axis.options.reserveSpace;

setRange(axis);
            });

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

plotOffset.left = plotOffset.right = plotOffset.top = plotOffset.bottom = 0;
            if (options.grid.show) {
                $.each(allocatedAxes, function (_, axis) {
                    // make the ticks
                    setupTickGeneration(axis);
                    setTicks(axis);
                    snapRangeToTicks(axis, axis.ticks);

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

// with all dimensions in house, we can compute the
                // axis 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
                var minMargin = options.grid.minBorderMargin;
                if (minMargin == null) {
                    minMargin = 0;
                    for (i = 0; i < series.length; ++i)
                        minMargin = Math.max(minMargin, series[i].points.radius + series[i].points.lineWidth/2);
                }

for (var a in plotOffset) {
                    plotOffset[a] += options.grid.borderWidth;
                    plotOffset[a] = Math.max(minMargin, plotOffset[a]);
                }
            }

plotWidth = canvasWidth - plotOffset.left - plotOffset.right;
            plotHeight = canvasHeight - plotOffset.bottom - plotOffset.top;

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

if (options.grid.show) {
                $.each(allocatedAxes, function (_, axis) {
                    allocateAxisBoxSecondPhase(axis);
                });

insertAxisLabels();
            }

insertLegend();
        }

function setRange(axis) {
            var opts = axis.options,
                min = +(opts.min != null ? opts.min : axis.datamin),
                max = +(opts.max != null ? opts.max : axis.datamax),
                delta = max - min;

if (delta == 0.0) {
                // degenerate case
                var widen = max == 0 ? 1 : 0.01;

if (opts.min == null)
                    min -= widen;
                // always widen max if we couldn't widen min to ensure we
                // don't fall into min == max which doesn't work
                if (opts.max == null || opts.min != null)
                    max += widen;
            }
            else {
                // consider autoscaling
                var margin = opts.autoscaleMargin;
                if (margin != null) {
                    if (opts.min == null) {
                        min -= delta * margin;
                        // make sure we don't go below zero if all values
                        // are positive
                        if (min < 0 && axis.datamin != null && axis.datamin >= 0)
                            min = 0;
                    }
                    if (opts.max == null) {
                        max += delta * margin;
                        if (max > 0 && axis.datamax != null && axis.datamax <= 0)
                            max = 0;
                    }
                }
            }
            axis.min = min;
            axis.max = max;
        }

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

// estimate number of ticks
            var noTicks;
            if (typeof opts.ticks == "number" && opts.ticks > 0)
                noTicks = opts.ticks;
            else
            // heuristic based on the model a*sqrt(x) fitted to
            // some data points that seemed reasonable
                noTicks = 0.3 * Math.sqrt(axis.direction == "x" ? canvasWidth : canvasHeight);

var delta = (axis.max - axis.min) / noTicks,
                size, generator, unit, formatter, i, magn, norm;

if (opts.mode == "time") {
                // pretty handling of time

// map of app. size of time units in milliseconds
                var timeUnitSize = {
                    "second": 1000,
                    "minute": 60 * 1000,
                    "hour": 60 * 60 * 1000,
                    "day": 24 * 60 * 60 * 1000,
                    "month": 30 * 24 * 60 * 60 * 1000,
                    "year": 365.2425 * 24 * 60 * 60 * 1000
                };

// the allowed tick sizes, after 1 year we use
                // an integer algorithm
                var spec = [
                    [1, "second"], [2, "second"], [5, "second"], [10, "second"],
                    [30, "second"],
                    [1, "minute"], [2, "minute"], [5, "minute"], [10, "minute"],
                    [30, "minute"],
                    [1, "hour"], [2, "hour"], [4, "hour"],
                    [8, "hour"], [12, "hour"],
                    [1, "day"], [2, "day"], [3, "day"],
                    [0.25, "month"], [0.5, "month"], [1, "month"],
                    [2, "month"], [3, "month"], [6, "month"],
                    [1, "year"]
                ];

var minSize = 0;
                if (opts.minTickSize != null) {
                    if (typeof opts.tickSize == "number")
                        minSize = opts.tickSize;
                    else
                        minSize = opts.minTickSize[0] * timeUnitSize[opts.minTickSize[1]];
                }

for (var i = 0; i < spec.length - 1; ++i)
                    if (delta < (spec[i][0] * timeUnitSize[spec[i][1]]
                        + spec[i + 1][0] * timeUnitSize[spec[i + 1][1]]) / 2
                        && spec[i][0] * timeUnitSize[spec[i][1]] >= minSize)
                        break;
                size = spec[i][0];
                unit = spec[i][1];

// special-case the possibility of several years
                if (unit == "year") {
                    magn = Math.pow(10, Math.floor(Math.log(delta / timeUnitSize.year) / Math.LN10));
                    norm = (delta / timeUnitSize.year) / magn;
                    if (norm < 1.5)
                        size = 1;
                    else if (norm < 3)
                        size = 2;
                    else if (norm < 7.5)
                        size = 5;
                    else
                        size = 10;

size *= magn;
                }

axis.tickSize = opts.tickSize || [size, unit];

generator = function(axis) {
                    var ticks = [],
                        tickSize = axis.tickSize[0], unit = axis.tickSize[1],
                        d = new Date(axis.min);

var step = tickSize * timeUnitSize[unit];

if (unit == "second")
                        d.setUTCSeconds(floorInBase(d.getUTCSeconds(), tickSize));
                    if (unit == "minute")
                        d.setUTCMinutes(floorInBase(d.getUTCMinutes(), tickSize));
                    if (unit == "hour")
                        d.setUTCHours(floorInBase(d.getUTCHours(), tickSize));
                    if (unit == "month")
                        d.setUTCMonth(floorInBase(d.getUTCMonth(), tickSize));
                    if (unit == "year")
                        d.setUTCFullYear(floorInBase(d.getUTCFullYear(), tickSize));

// reset smaller components
                    d.setUTCMilliseconds(0);
                    if (step >= timeUnitSize.minute)
                        d.setUTCSeconds(0);
                    if (step >= timeUnitSize.hour)
                        d.setUTCMinutes(0);
                    if (step >= timeUnitSize.day)
                        d.setUTCHours(0);
                    if (step >= timeUnitSize.day * 4)
                        d.setUTCDate(1);
                    if (step >= timeUnitSize.year)
                        d.setUTCMonth(0);

return ticks;
                };

formatter = function (v, axis) {
                    var d = new Date(v);

// first check global format
                    if (opts.timeformat != null)
                        return $.plot.formatDate(d, opts.timeformat, opts.monthNames);

var t = axis.tickSize[0] * timeUnitSize[axis.tickSize[1]];
                    var span = axis.max - axis.min;
                    var suffix = (opts.twelveHourClock) ? " %p" : "";

if (t < timeUnitSize.minute)
                        fmt = "%h:%M:%S" + suffix;
                    else if (t < timeUnitSize.day) {
                        if (span < 2 * timeUnitSize.day)
                            fmt = "%h:%M" + suffix;
                        else
                            fmt = "%b %d %h:%M" + suffix;
                    }
                    else if (t < timeUnitSize.month)
                        fmt = "%b %d";
                    else if (t < timeUnitSize.year) {
                        if (span < timeUnitSize.year)
                            fmt = "%b";
                        else
                            fmt = "%b %y";
                    }
                    else
                        fmt = "%y";

return $.plot.formatDate(d, fmt, opts.monthNames);
                };
            }
            else {
                // pretty rounding of base-10 numbers
                var maxDec = opts.tickDecimals;
                var dec = -Math.floor(Math.log(delta) / Math.LN10);
                if (maxDec != null && dec > maxDec)
                    dec = maxDec;

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

if (norm < 1.5)
                    size = 1;
                else if (norm < 3) {
                    size = 2;
                    // special case for 2.5, requires an extra decimal
                    if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) {
                        size = 2.5;
                        ++dec;
                    }
                }
                else if (norm < 7.5)
                    size = 5;
                else
                    size = 10;

size *= magn;

if (opts.minTickSize != null && size < opts.minTickSize)
                    size = opts.minTickSize;

axis.tickDecimals = Math.max(0, maxDec != null ? maxDec : dec);
                axis.tickSize = opts.tickSize || size;

generator = function (axis) {
                    var ticks = [];

// spew out all possible ticks
                    var 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;
                };

formatter = function (v, axis) {
                    return v.toFixed(axis.tickDecimals);
                };
            }

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 = generator(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]);
                    }

generator = 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 != "time" && opts.tickDecimals == null) {
                        var extraDec = Math.max(0, -Math.floor(Math.log(delta) / Math.LN10) + 1),
                            ts = generator(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;
                    }
                }
            }

axis.tickGenerator = generator;
            if ($.isFunction(opts.tickFormatter))
                axis.tickFormatter = function (v, axis) { return "" + opts.tickFormatter(v, axis); };
            else
                axis.tickFormatter = formatter;
        }

function setTicks(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({ min: axis.min, max: axis.max });
                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 (label == null)
                    label = axis.tickFormatter(v, axis);
                if (!isNaN(v))
                    axis.ticks.push({ v: v, label: label });
            }
        }

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

function draw() {
            ctx.clearRect(0, 0, canvasWidth, canvasHeight);

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();
        }

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

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

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

// draw markings
            var markings = options.grid.markings;
            if (markings) {
                if ($.isFunction(markings)) {
                    var 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);
                }

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);

if (xrange.from == xrange.to && yrange.from == yrange.to)
                        continue;

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

if (xrange.from == xrange.to || yrange.from == yrange.to) {
                        // draw line
                        ctx.beginPath();
                        ctx.strokeStyle = m.color || options.grid.markingsColor;
                        ctx.lineWidth = m.lineWidth || options.grid.markingsLineWidth;
                        ctx.moveTo(xrange.from, yrange.from);
                        ctx.lineTo(xrange.to, yrange.to);
                        ctx.stroke();
                    }
                    else {
                        // fill area
                        ctx.fillStyle = m.color || options.grid.markingsColor;
                        ctx.fillRect(xrange.from, yrange.to,
                            xrange.to - xrange.from,
                            yrange.from - yrange.to);
                    }
                }
            }

// draw the ticks
            var axes = allAxes(), bw = options.grid.borderWidth;

for (var j = 0; j < axes.length; ++j) {
                var axis = axes[j], box = axis.box,
                    t = axis.tickLength, x, y, xoff, yoff;
                if (!axis.show || axis.ticks.length == 0)
                    continue

ctx.strokeStyle = axis.options.tickColor || $.color.parse(axis.options.color).scale('a', 0.22).toString();
                ctx.lineWidth = 1;

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

// draw tick bar
                if (!axis.innermost) {
                    ctx.beginPath();
                    xoff = yoff = 0;
                    if (axis.direction == "x")
                        xoff = plotWidth;
                    else
                        yoff = plotHeight;

if (ctx.lineWidth == 1) {
                        x = Math.floor(x) + 0.5;
                        y = Math.floor(y) + 0.5;
                    }

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

// draw ticks
                ctx.beginPath();
                for (i = 0; i < axis.ticks.length; ++i) {
                    var v = axis.ticks[i].v;

xoff = yoff = 0;

if (v < axis.min || v > axis.max
                        // skip those lying on the axes if we got a border
                        || (t == "full" && bw > 0
                        && (v == axis.min || v == axis.max)))
                        continue;

if (axis.direction == "x") {
                        x = axis.p2c(v);
                        yoff = t == "full" ? -plotHeight : t;

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

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

if (ctx.lineWidth == 1) {
                        if (axis.direction == "x")
                            x = Math.floor(x) + 0.5;
                        else
                            y = Math.floor(y) + 0.5;
                    }

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

ctx.stroke();
            }

// draw border
            if (bw) {
                ctx.lineWidth = bw;
                ctx.strokeStyle = options.grid.borderColor;
                ctx.strokeRect(-bw/2, -bw/2, plotWidth + bw, plotHeight + bw);
            }

ctx.restore();
        }

function insertAxisLabels() {
            placeholder.find(".tickLabels").remove();

var html = ['<div class="tickLabels" style="font-size:smaller">'];

var axes = allAxes();
            for (var j = 0; j < axes.length; ++j) {
                var axis = axes[j], box = axis.box;
                if (!axis.show)
                    continue;
                //debug: html.push('<div style="position:absolute;opacity:0.10;background-color:red;left:' + box.left + 'px;top:' + box.top + 'px;width:' + box.width +  'px;height:' + box.height + 'px"></div>')
                html.push('<div class="' + axis.direction + 'Axis ' + axis.direction + axis.n + 'Axis" style="color:' + axis.options.color + '">');
                for (var i = 0; i < axis.ticks.length; ++i) {
                    var tick = axis.ticks[i];
                    if (!tick.label || tick.v < axis.min || tick.v > axis.max)
                        continue;

var pos = {}, align;

if (axis.direction == "x") {
                        align = "center";
                        pos.left = Math.round(plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2);
                        if (axis.position == "bottom")
                            pos.top = box.top + box.padding;
                        else
                            pos.bottom = canvasHeight - (box.top + box.height - box.padding);
                    }
                    else {
                        pos.top = Math.round(plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2);
                        if (axis.position == "left") {
                            pos.right = canvasWidth - (box.left + box.width - box.padding)
                            align = "right";
                        }
                        else {
                            pos.left = box.left + box.padding;
                            align = "left";
                        }
                    }

pos.width = axis.labelWidth;

var style = ["position:absolute", "text-align:" + align ];
                    for (var a in pos)
                        style.push(a + ":" + pos[a] + "px")

html.push('<div class="tickLabel" style="' + style.join(';') + '">' + tick.label + '</div>');
                }
                html.push('</div>');
            }

html.push('</div>');

placeholder.append(html.join(""));
        }

function drawSeries(series) {
            if (series.lines.show)
                drawSeriesLines(series);
            if (series.bars.show)
                drawSeriesBars(series);
            if (series.points.show)
                drawSeriesPoints(series);
        }

function drawSeriesLines(series) {
            function plotLine(datapoints, xoffset, yoffset, axisx, axisy) {
                var points = datapoints.points,
                    ps = datapoints.pointsize,
                    prevx = null, prevy = null;

ctx.beginPath();
                for (var i = ps; i < points.length; i += ps) {
                    var 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)
                            continue;   // line segment is outside
                        // 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) {
                var points = datapoints.points,
                    ps = datapoints.pointsize,
                    bottom = Math.min(Math.max(0, axisy.min), axisy.max),
                    i = 0, top, areaOpen = false,
                    ypos = 1, 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 (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;
                            ypos = 1;
                            i = segmentStart = segmentEnd + ps;
                            continue;
                        }
                    }

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

// clip x values

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));
                    }
                }
            }

ctx.save();
            ctx.translate(plotOffset.left, plotOffset.top);
            ctx.lineJoin = "round";

var lw = series.lines.lineWidth,
                sw = series.shadowSize;
            // FIXME: consider another form of shadow when filling is turned on
            if (lw > 0 && sw > 0) {
                // draw shadow as a thick and thin line with transparency
                ctx.lineWidth = sw;
                ctx.strokeStyle = "rgba(0,0,0,0.1)";
                // position shadow at angle from the mid of line
                var angle = Math.PI/18;
                plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/2), Math.cos(angle) * (lw/2 + sw/2), series.xaxis, series.yaxis);
                ctx.lineWidth = sw/2;
                plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/4), Math.cos(angle) * (lw/2 + sw/4), series.xaxis, series.yaxis);
            }

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

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

function drawSeriesPoints(series) {
            function plotPoints(datapoints, radius, fillStyle, offset, shadow, axisx, axisy, symbol) {
                var points = datapoints.points, ps = datapoints.pointsize;

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;

ctx.beginPath();
                    x = axisx.p2c(x);
                    y = axisy.p2c(y) + offset;
                    if (symbol == "circle")
                        ctx.arc(x, y, radius, 0, shadow ? Math.PI : Math.PI * 2, false);
                    else
                        symbol(ctx, x, y, radius, shadow);
                    ctx.closePath();

if (fillStyle) {
                        ctx.fillStyle = fillStyle;
                        ctx.fill();
                    }
                    ctx.stroke();
                }
            }

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

var lw = series.points.lineWidth,
                sw = series.shadowSize,
                radius = series.points.radius,
                symbol = series.points.symbol;
            if (lw > 0 && sw > 0) {
                // draw shadow in two steps
                var w = sw / 2;
                ctx.lineWidth = w;
                ctx.strokeStyle = "rgba(0,0,0,0.1)";
                plotPoints(series.datapoints, radius, null, w + w/2, true,
                    series.xaxis, series.yaxis, symbol);

ctx.strokeStyle = "rgba(0,0,0,0.2)";
                plotPoints(series.datapoints, radius, null, w/2, true,
                    series.xaxis, series.yaxis, symbol);
            }

ctx.lineWidth = lw;
            ctx.strokeStyle = series.color;
            plotPoints(series.datapoints, radius,
                getFillStyle(series.points, series.color), 0, false,
                series.xaxis, series.yaxis, symbol);
            ctx.restore();
        }

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

// in horizontal mode, we start the bar from the left
            // instead of from the bottom so it appears to be
            // horizontal rather than vertical
            if (horizontal) {
                drawBottom = drawRight = drawTop = true;
                drawLeft = false;
                left = b;
                right = x;
                top = y + barLeft;
                bottom = y + barRight;

// account for negative bars
                if (right < left) {
                    tmp = right;
                    right = left;
                    left = tmp;
                    drawLeft = true;
                    drawRight = false;
                }
            }
            else {
                drawLeft = drawRight = drawTop = true;
                drawBottom = false;
                left = x + barLeft;
                right = x + barRight;
                bottom = b;
                top = y;

// 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.beginPath();
                c.moveTo(left, bottom);
                c.lineTo(left, top);
                c.lineTo(right, top);
                c.lineTo(right, bottom);
                c.fillStyle = fillStyleCallback(bottom, top);
                c.fill();
            }

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

// FIXME: inline moveTo is buggy with excanvas
                c.moveTo(left, bottom + offset);
                if (drawLeft)
                    c.lineTo(left, top + offset);
                else
                    c.moveTo(left, top + offset);
                if (drawTop)
                    c.lineTo(right, top + offset);
                else
                    c.moveTo(right, top + offset);
                if (drawRight)
                    c.lineTo(right, bottom + offset);
                else
                    c.moveTo(right, bottom + offset);
                if (drawBottom)
                    c.lineTo(left, bottom + offset);
                else
                    c.moveTo(left, bottom + offset);
                c.stroke();
            }
        }

function drawSeriesBars(series) {
            function plotBars(datapoints, barLeft, barRight, offset, fillStyleCallback, axisx, axisy) {
                var points = datapoints.points, ps = datapoints.pointsize,
                    extendedFillStyleCallback = null;

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

if(fillStyleCallback) {
                        extendedFillStyleCallback = function(top, bottom) {
                            return fillStyleCallback(top, bottom, i/ps);
                        }
                    }

drawBar(points[i], points[i + 1], points[i + 2], barLeft, barRight, offset, extendedFillStyleCallback, axisx, axisy, ctx, series.bars.horizontal, series.bars.lineWidth);
                }
            }

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

// FIXME: figure out a way to add shadows (for instance along the right edge)
            ctx.lineWidth = series.bars.lineWidth;
            ctx.strokeStyle = series.color;
            var barLeft = series.bars.align == "left" ? 0 : -series.bars.barWidth/2;
            var fillStyleCallback = null;

if(series.bars.fill) {
                if(series.bars.fillCallback) {
                    fillStyleCallback = function(bottom, top, dataIndex) {
                        var customConfiguration = $.extend(true, {}, series, series.bars.fillCallback(bottom, top, dataIndex));
                        return getFillStyle(customConfiguration.bars, customConfiguration.color, bottom, top);
                    }
                } else {
                    fillStyleCallback = function(bottom, top) {
                        return getFillStyle(series.bars, series.color, bottom, top)
                    }
                }
            }

plotBars(series.datapoints, barLeft, barLeft + series.bars.barWidth, 0, fillStyleCallback, series.xaxis, series.yaxis);
            ctx.restore();
        }

function getFillStyle(filloptions, seriesColor, bottom, top) {
            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();
        }

function insertLegend() {
            placeholder.find(".legend").remove();

if (!options.legend.show)
                return;

var fragments = [], rowStarted = false,
                lf = options.legend.labelFormatter, s, label;
            for (var i = 0; i < series.length; ++i) {
                s = series[i];
                label = s.label;
                if (!label)
                    continue;

if (i % options.legend.noColumns == 0) {
                    if (rowStarted)
                        fragments.push('</tr>');
                    fragments.push('<tr>');
                    rowStarted = true;
                }

if (lf)
                    label = lf(label, s);

fragments.push(
                    '<td class="legendColorBox"><div style="border:1px solid ' + options.legend.labelBoxBorderColor + ';padding:1px"><div style="width:4px;height:0;border:5px solid ' + s.color + ';overflow:hidden"></div></div></td>' +
                        '<td class="legendLabel">' + label + '</td>');
            }
            if (rowStarted)
                fragments.push('</tr>');

if(options.legend.reversed) {
                fragments.reverse();
            }

if (fragments.length == 0)
                return;

// interactive features

var highlights = [],
            redrawTimeout = null;

// returns the data item the mouse is over, or null if none is found
        function findNearbyItem(mouseX, mouseY, seriesFilter) {
            var maxDistance = options.grid.mouseActiveRadius,
                smallestDistance = maxDistance * maxDistance + 1,
                item = null, foundPoint = false, i, j;

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

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

// 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) {
                        var 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 = dx * dx + dy * dy; // we save the sqrt

// 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 = s.bars.align == "left" ? 0 : -s.bars.barWidth/2,
                        barRight = barLeft + s.bars.barWidth;

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

// for a bar graph, the cursor must be inside the bar
                        if (series[i].bars.horizontal ?
                            (mx <= Math.max(b, x) && mx >= Math.min(b, x) &&
                                my >= y + barLeft && my <= y + barRight) :
                            (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 (s) { return s["hoverable"] != false; });
        }

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

function onClick(e) {
            triggerClickHoverEvent("plotclick", e,
                function (s) { return s["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 = canvasToAxisCoords({ left: canvasX, top: canvasY });

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

var item = findNearbyItem(canvasX, canvasY, seriesFilter);

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);
                item.pageY = parseInt(item.series.yaxis.p2c(item.datapoint[1]) + offset.top + plotOffset.top);
            }

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);
            }

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

function triggerRedrawOverlay() {
            if (!redrawTimeout)
                redrawTimeout = setTimeout(drawOverlay, 30);
        }

function drawOverlay() {
            redrawTimeout = null;

// draw highlights
            octx.save();
            octx.clearRect(0, 0, canvasWidth, canvasHeight);
            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]);
        }

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();
            }

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

if (typeof point == "number")
                point = s.data[point];

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;

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 = $.color.parse(series.color).scale('a', 0.5).toString();
            var radius = 1.5 * pointRadius,
                x = axisx.p2c(x),
                y = axisy.p2c(y);

octx.beginPath();
            if (series.points.symbol == "circle")
                octx.arc(x, y, radius, 0, 2 * Math.PI, false);
            else
                series.points.symbol(octx, x, y, radius, false);
            octx.closePath();
            octx.stroke();
        }

function drawBarHighlight(series, point) {
            octx.lineWidth = series.bars.lineWidth;
            octx.strokeStyle = $.color.parse(series.color).scale('a', 0.5).toString();
            var fillStyle = $.color.parse(series.color).scale('a', 0.5).toString();
            var barLeft = series.bars.align == "left" ? 0 : -series.bars.barWidth/2;
            drawBar(point[0], point[1], point[2] || 0, barLeft, barLeft + series.bars.barWidth,
                0, function () { return fillStyle; }, series.xaxis, series.yaxis, octx, series.bars.horizontal, 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;
            }
        }
    }

$.plot = function(placeholder, data, options) {
        //var t0 = new Date();
        //console.time("chart creation");
        var plot = new Plot($(placeholder), data, options, $.plot.plugins);
        //console.timeEnd("chart creation");
        //(window.console ? console.log : alert)("time used (msecs): " + ((new Date()).getTime() - t0.getTime()));
        return plot;
    };

$.plot.version = "0.7";

$.plot.plugins = [];

// returns a string with the date d formatted according to fmt
    $.plot.formatDate = function(d, fmt, monthNames) {
        var leftPad = function(n) {
            n = "" + n;
            return n.length == 1 ? "0" + n : n;
        };

var r = [];
        var escape = false, padNext = false;
        var hours = d.getUTCHours();
        var isAM = hours < 12;
        if (monthNames == null)
            monthNames = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];

if (fmt.search(/%p|%P/) != -1) {
            if (hours > 12) {
                hours = hours - 12;
            } else if (hours == 0) {
                hours = 12;
            }
        }
        for (var i = 0; i < fmt.length; ++i) {
            var c = fmt.charAt(i);

if (escape) {
                switch (c) {
                    case 'h': c = "" + hours; break;
                    case 'H': c = leftPad(hours); break;
                    case 'M': c = leftPad(d.getUTCMinutes()); break;
                    case 'S': c = leftPad(d.getUTCSeconds()); break;
                    case 'd': c = "" + d.getUTCDate(); break;
                    case 'm': c = "" + (d.getUTCMonth() + 1); break;
                    case 'y': c = "" + d.getUTCFullYear(); break;
                    case 'b': c = "" + monthNames[d.getUTCMonth()]; break;
                    case 'p': c = (isAM) ? ("" + "am") : ("" + "pm"); break;
                    case 'P': c = (isAM) ? ("" + "AM") : ("" + "PM"); break;
                    case '0': c = ""; padNext = true; break;
                }
                if (c && padNext) {
                    c = leftPad(c);
                    padNext = false;
                }
                r.push(c);
                if (!padNext)
                    escape = false;
            }
            else {
                if (c == "%")
                    escape = true;
                else
                    r.push(c);
            }
        }
        return r.join("");
    };

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

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