gitphp 0.2.9.1 :: bus.git/blobdiff

/* Javascript plotting library for jQuery, v. 0.6.

*

* 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 1.0.

*

* 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() work in-place instead of returning

* new objects.

*/

// 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

},

xaxis: {

mode: null, // null or "time"

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,

// 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

},

x2axis: {

autoscaleMargin: null

},

y2axis: {

autoscaleMargin: 0.02

},

series: {

points: {

show: false,

radius: 3,

lineWidth: 2, // in pixels

fill: true,

fillColor: "#ffffff"

},

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 // when horizontal, left is now top

},

shadowSize: 3

},

grid: {

show: true,

aboveData: false,

color: "#545454", // primary color used for outline and labels

backgroundColor: null, // null for transparent, else color

tickColor: "rgba(0,0,0,0.15)", // color used for the ticks

labelMargin: 5, // in pixels

borderWidth: 2, // in pixels

borderColor: null, // set if different from the grid color

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,

axes = { xaxis: {}, yaxis: {}, x2axis: {}, y2axis: {} },

plotOffset = { left: 0, right: 0, top: 0, bottom: 0},

canvasWidth = 0, canvasHeight = 0,

plotWidth = 0, plotHeight = 0,

hooks = {

processOptions: [],

processRawData: [],

processDatapoints: [],

draw: [],

bindEvents: [],

drawOverlay: []

},

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() { return axes; };

plot.getOptions = function() { return options; };

plot.highlight = highlight;

plot.unhighlight = unhighlight;

plot.triggerRedrawOverlay = triggerRedrawOverlay;

plot.pointOffset = function(point) {

return { left: parseInt(axisSpecToRealAxis(point, "xaxis").p2c(+point.x) + plotOffset.left),

top: parseInt(axisSpecToRealAxis(point, "yaxis").p2c(+point.y) + plotOffset.top) };

};

// public attributes

plot.hooks = hooks;

// initialize

initPlugins(plot);

parseOptions(options_);

constructCanvas();

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) {

$.extend(true, options, opts);

if (options.grid.borderColor == null)

options.grid.borderColor = options.grid.color;

// 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.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)

options.series.shadowSize = options.shadowSize;

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) {

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 axisSpecToRealAxis(obj, attr) {

var a = obj[attr];

if (!a || a == 1)

return axes[attr];

if (typeof a == "number")

return axes[attr.charAt(0) + a + attr.slice(1)];

return a; // assume it's OK

}

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].show) {

show = false;

break;

}

if (show)

s.lines.show = true;

}

// setup axes

s.xaxis = axisSpecToRealAxis(s, "xaxis");

s.yaxis = axisSpecToRealAxis(s, "yaxis");

}

function processData() {

var topSentry = Number.POSITIVE_INFINITY,

bottomSentry = Number.NEGATIVE_INFINITY,

i, j, k, m, length,

s, points, ps, x, y, axis, val, f, p;

for (axis in axes) {

axes[axis].datamin = topSentry;

axes[axis].datamax = bottomSentry;

axes[axis].used = false;

}

function updateAxis(axis, min, max) {

if (min < axis.datamin)

axis.datamin = min;

if (max > axis.datamax)

axis.datamax = max;

}

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)

format.push({ y: true, number: true, required: false, defaultValue: 0 });

s.datapoints.format = format;

}

if (s.datapoints.pointsize != null)

continue; // already filled in

if (s.datapoints.pointsize == null)

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;

}

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)

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);

}

for (axis in axes) {

if (axes[axis].datamin == topSentry)

axes[axis].datamin = null;

if (axes[axis].datamax == bottomSentry)

axes[axis].datamax = null;

}

function constructCanvas() {

function makeCanvas(width, height) {

var c = document.createElement('canvas');

c.width = width;

c.height = height;

if ($.browser.msie) // excanvas hack

c = window.G_vmlCanvasManager.initElement(c);

return c;

}

canvasWidth = placeholder.width();

canvasHeight = placeholder.height();

placeholder.html(""); // clear placeholder

if (placeholder.css("position") == 'static')

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

if (canvasWidth <= 0 || canvasHeight <= 0)

throw "Invalid dimensions for plot, width = " + canvasWidth + ", height = " + canvasHeight;

if ($.browser.msie) // excanvas hack

window.G_vmlCanvasManager.init_(document); // make sure everything is setup

// the canvas

canvas = $(makeCanvas(canvasWidth, canvasHeight)).appendTo(placeholder).get(0);

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

// overlay canvas for interactive features

overlay = $(makeCanvas(canvasWidth, canvasHeight)).css({ position: 'absolute', left: 0, top: 0 }).appendTo(placeholder).get(0);

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

octx.stroke();

}

function bindEvents() {

// we include the canvas in the event holder too, because IE 7

// sometimes has trouble with the stacking order

eventHolder = $([overlay, canvas]);

// bind events

if (options.grid.hoverable)

eventHolder.mousemove(onMouseMove);

if (options.grid.clickable)

eventHolder.click(onClick);

executeHooks(hooks.bindEvents, [eventHolder]);

}

function setupGrid() {

function setTransformationHelpers(axis, o) {

function identity(x) { return x; }

var s, m, t = o.transform || identity,

it = o.inverseTransform;

// add transformation helpers

if (axis == axes.xaxis || axis == axes.x2axis) {

// precompute how much the axis is scaling a point

// in canvas space

s = axis.scale = plotWidth / (t(axis.max) - t(axis.min));

m = 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); };

}

else {

s = axis.scale = plotHeight / (t(axis.max) - t(axis.min));

m = t(axis.max);

if (t == identity)

axis.p2c = function (p) { return (m - p) * s; };

else

axis.p2c = function (p) { return (m - t(p)) * s; };

if (!it)

axis.c2p = function (c) { return m - c / s; };

else

axis.c2p = function (c) { return it(m - c / s); };

}

function measureLabels(axis, axisOptions) {

var i, labels = [], l;

axis.labelWidth = axisOptions.labelWidth;

axis.labelHeight = axisOptions.labelHeight;

if (axis == axes.xaxis || axis == axes.x2axis) {

// to avoid measuring the widths of the labels, 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 (axis.labelWidth == null)

axis.labelWidth = canvasWidth / (axis.ticks.length > 0 ? axis.ticks.length : 1);

// measure x label heights

if (axis.labelHeight == null) {

labels = [];

for (i = 0; i < axis.ticks.length; ++i) {

l = axis.ticks[i].label;

if (l)

labels.push('<div class="tickLabel" style="float:left;width:' + axis.labelWidth + 'px">' + l + '</div>');

}

if (labels.length > 0) {

var dummyDiv = $('<div style="position:absolute;top:-10000px;width:10000px;font-size:smaller">'

+ labels.join("") + '<div style="clear:left"></div></div>').appendTo(placeholder);

axis.labelHeight = dummyDiv.height();

dummyDiv.remove();

}

else if (axis.labelWidth == null || axis.labelHeight == null) {

// calculate y label dimensions

for (i = 0; i < axis.ticks.length; ++i) {

l = axis.ticks[i].label;

if (l)

labels.push('<div class="tickLabel">' + l + '</div>');

}

if (labels.length > 0) {

var dummyDiv = $('<div style="position:absolute;top:-10000px;font-size:smaller">'

+ labels.join("") + '</div>').appendTo(placeholder);

if (axis.labelWidth == null)

axis.labelWidth = dummyDiv.width();

if (axis.labelHeight == null)

axis.labelHeight = dummyDiv.find("div").height();

dummyDiv.remove();

}

if (axis.labelWidth == null)

axis.labelWidth = 0;

if (axis.labelHeight == null)

axis.labelHeight = 0;

}

function setGridSpacing() {

// get the most space needed around the grid for things

// that may stick out

var maxOutset = options.grid.borderWidth;

for (i = 0; i < series.length; ++i)

maxOutset = Math.max(maxOutset, 2 * (series[i].points.radius + series[i].points.lineWidth/2));

plotOffset.left = plotOffset.right = plotOffset.top = plotOffset.bottom = maxOutset;

var margin = options.grid.labelMargin + options.grid.borderWidth;

if (axes.xaxis.labelHeight > 0)

plotOffset.bottom = Math.max(maxOutset, axes.xaxis.labelHeight + margin);

if (axes.yaxis.labelWidth > 0)

plotOffset.left = Math.max(maxOutset, axes.yaxis.labelWidth + margin);

if (axes.x2axis.labelHeight > 0)

plotOffset.top = Math.max(maxOutset, axes.x2axis.labelHeight + margin);

if (axes.y2axis.labelWidth > 0)

plotOffset.right = Math.max(maxOutset, axes.y2axis.labelWidth + margin);

plotWidth = canvasWidth - plotOffset.left - plotOffset.right;

plotHeight = canvasHeight - plotOffset.bottom - plotOffset.top;

}

var axis;

for (axis in axes)

setRange(axes[axis], options[axis]);

if (options.grid.show) {

for (axis in axes) {

prepareTickGeneration(axes[axis], options[axis]);

setTicks(axes[axis], options[axis]);

measureLabels(axes[axis], options[axis]);

}

setGridSpacing();

}

else {

plotOffset.left = plotOffset.right = plotOffset.top = plotOffset.bottom = 0;

plotWidth = canvasWidth;

plotHeight = canvasHeight;

}

for (axis in axes)

setTransformationHelpers(axes[axis], options[axis]);

if (options.grid.show)

insertLabels();

insertLegend();

}

function setRange(axis, axisOptions) {

var min = +(axisOptions.min != null ? axisOptions.min : axis.datamin),

max = +(axisOptions.max != null ? axisOptions.max : axis.datamax),

delta = max - min;

if (delta == 0.0) {

// degenerate case

var widen = max == 0 ? 1 : 0.01;

if (axisOptions.min == null)

min -= widen;

// alway widen max if we couldn't widen min to ensure we

// don't fall into min == max which doesn't work

if (axisOptions.max == null || axisOptions.min != null)

max += widen;

}

else {

// consider autoscaling

var margin = axisOptions.autoscaleMargin;

if (margin != null) {

if (axisOptions.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 (axisOptions.max == null) {

max += delta * margin;

if (max > 0 && axis.datamax != null && axis.datamax <= 0)

max = 0;

}

axis.min = min;

axis.max = max;

}

function prepareTickGeneration(axis, axisOptions) {

// estimate number of ticks

var noTicks;

if (typeof axisOptions.ticks == "number" && axisOptions.ticks > 0)

noTicks = axisOptions.ticks;

else if (axis == axes.xaxis || axis == axes.x2axis)

// heuristic based on the model a*sqrt(x) fitted to

// some reasonable data points

noTicks = 0.3 * Math.sqrt(canvasWidth);

else

noTicks = 0.3 * Math.sqrt(canvasHeight);

var delta = (axis.max - axis.min) / noTicks,

size, generator, unit, formatter, i, magn, norm;

if (axisOptions.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 (axisOptions.minTickSize != null) {

if (typeof axisOptions.tickSize == "number")

minSize = axisOptions.tickSize;

else

minSize = axisOptions.minTickSize[0] * timeUnitSize[axisOptions.minTickSize[1]];

}

for (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;

}

if (axisOptions.tickSize) {

size = axisOptions.tickSize[0];

unit = axisOptions.tickSize[1];

}

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);

var carry = 0, v = Number.NaN, prev;

do {

prev = v;

v = d.getTime();

ticks.push({ v: v, label: axis.tickFormatter(v, axis) });

if (unit == "month") {

if (tickSize < 1) {

// a bit complicated - we'll divide the month

// up but we need to take care of fractions

// so we don't end up in the middle of a day

d.setUTCDate(1);

var start = d.getTime();

d.setUTCMonth(d.getUTCMonth() + 1);

var end = d.getTime();

d.setTime(v + carry * timeUnitSize.hour + (end - start) * tickSize);

carry = d.getUTCHours();

d.setUTCHours(0);

}

else

d.setUTCMonth(d.getUTCMonth() + tickSize);

}

else if (unit == "year") {

d.setUTCFullYear(d.getUTCFullYear() + tickSize);

}

else

d.setTime(v + step);

} while (v < axis.max && v != prev);

return ticks;

};

formatter = function (v, axis) {

var d = new Date(v);

// first check global format

if (axisOptions.timeformat != null)

return $.plot.formatDate(d, axisOptions.timeformat, axisOptions.monthNames);

var t = axis.tickSize[0] * timeUnitSize[axis.tickSize[1]];

var span = axis.max - axis.min;

var suffix = (axisOptions.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, axisOptions.monthNames);

};

}

else {

// pretty rounding of base-10 numbers

var maxDec = axisOptions.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 (axisOptions.minTickSize != null && size < axisOptions.minTickSize)

size = axisOptions.minTickSize;

if (axisOptions.tickSize != null)

size = axisOptions.tickSize;

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

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: v, label: axis.tickFormatter(v, axis) });

++i;

} while (v < axis.max && v != prev);

return ticks;

};

formatter = function (v, axis) {

return v.toFixed(axis.tickDecimals);

};

}

axis.tickSize = unit ? [size, unit] : size;

axis.tickGenerator = generator;

if ($.isFunction(axisOptions.tickFormatter))

axis.tickFormatter = function (v, axis) { return "" + axisOptions.tickFormatter(v, axis); };

else

axis.tickFormatter = formatter;

}

function setTicks(axis, axisOptions) {

axis.ticks = [];

if (!axis.used)

return;

if (axisOptions.ticks == null)

axis.ticks = axis.tickGenerator(axis);

else if (typeof axisOptions.ticks == "number") {

if (axisOptions.ticks > 0)

axis.ticks = axis.tickGenerator(axis);

}

else if (axisOptions.ticks) {

var ticks = axisOptions.ticks;

if ($.isFunction(ticks))

// generate the ticks

ticks = ticks({ min: axis.min, max: axis.max });

// clean up the user-supplied ticks, copy them over

var i, v;

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);

axis.ticks[i] = { v: v, label: label };

}

if (axisOptions.autoscaleMargin != null && axis.ticks.length > 0) {

// snap to ticks

if (axisOptions.min == null)

axis.min = Math.min(axis.min, axis.ticks[0].v);

if (axisOptions.max == null && axis.ticks.length > 1)

axis.max = Math.max(axis.max, axis.ticks[axis.ticks.length - 1].v);

}

function draw() {

ctx.clearRect(0, 0, canvasWidth, canvasHeight);

var grid = options.grid;

if (grid.show && !grid.aboveData)

drawGrid();

for (var i = 0; i < series.length; ++i)

drawSeries(series[i]);

executeHooks(hooks.draw, [ctx]);

if (grid.show && grid.aboveData)

drawGrid();

}

function extractRange(ranges, coord) {

var firstAxis = coord + "axis",

secondaryAxis = coord + "2axis",

axis, from, to, reverse;

if (ranges[firstAxis]) {

axis = axes[firstAxis];

from = ranges[firstAxis].from;

to = ranges[firstAxis].to;

}

else if (ranges[secondaryAxis]) {

axis = axes[secondaryAxis];

from = ranges[secondaryAxis].from;

to = ranges[secondaryAxis].to;

}

else {

// backwards-compat stuff - to be removed in future

axis = axes[firstAxis];

from = ranges[coord + "1"];

to = ranges[coord + "2"];

}

// auto-reverse as an added bonus

if (from != null && to != null && from > to)

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

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

}

function drawGrid() {

var i;

ctx.save();

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

// draw background, if any

if (options.grid.backgroundColor) {

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

ctx.fillRect(0, 0, plotWidth, plotHeight);

}

// draw markings

var markings = options.grid.markings;

if (markings) {

if ($.isFunction(markings))

// xmin etc. are backwards-compatible, to be removed in future

markings = markings({ xmin: axes.xaxis.min, xmax: axes.xaxis.max, ymin: axes.yaxis.min, ymax: axes.yaxis.max, xaxis: axes.xaxis, yaxis: axes.yaxis, x2axis: axes.x2axis, y2axis: axes.y2axis });

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(Math.floor(xrange.from), yrange.from);

//ctx.lineTo(Math.floor(xrange.to), yrange.to);

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 inner grid

ctx.lineWidth = 1;

ctx.strokeStyle = options.grid.tickColor;

ctx.beginPath();

var v, axis = axes.xaxis;

for (i = 0; i < axis.ticks.length; ++i) {

v = axis.ticks[i].v;

if (v <= axis.min || v >= axes.xaxis.max)

continue; // skip those lying on the axes

ctx.moveTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, 0);

ctx.lineTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, plotHeight);

}

axis = axes.yaxis;

for (i = 0; i < axis.ticks.length; ++i) {

v = axis.ticks[i].v;

if (v <= axis.min || v >= axis.max)

continue;

ctx.moveTo(0, Math.floor(axis.p2c(v)) + ctx.lineWidth/2);

ctx.lineTo(plotWidth, Math.floor(axis.p2c(v)) + ctx.lineWidth/2);

}

axis = axes.x2axis;

for (i = 0; i < axis.ticks.length; ++i) {

v = axis.ticks[i].v;

if (v <= axis.min || v >= axis.max)

continue;

ctx.moveTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, -5);

ctx.lineTo(Math.floor(axis.p2c(v)) + ctx.lineWidth/2, 5);

}

axis = axes.y2axis;

for (i = 0; i < axis.ticks.length; ++i) {

v = axis.ticks[i].v;

if (v <= axis.min || v >= axis.max)

continue;

ctx.moveTo(plotWidth-5, Math.floor(axis.p2c(v)) + ctx.lineWidth/2);

ctx.lineTo(plotWidth+5, Math.floor(axis.p2c(v)) + ctx.lineWidth/2);

}

ctx.stroke();

if (options.grid.borderWidth) {

// draw border

var bw = options.grid.borderWidth;

ctx.lineWidth = bw;

ctx.strokeStyle = options.grid.borderColor;

ctx.strokeRect(-bw/2, -bw/2, plotWidth + bw, plotHeight + bw);

}

ctx.restore();

}

function insertLabels() {

placeholder.find(".tickLabels").remove();

var html = ['<div class="tickLabels" style="font-size:smaller;color:' + options.grid.color + '">'];

function addLabels(axis, labelGenerator) {

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;

html.push(labelGenerator(tick, axis));

}

var margin = options.grid.labelMargin + options.grid.borderWidth;

addLabels(axes.xaxis, function (tick, axis) {

return '<div style="position:absolute;top:' + (plotOffset.top + plotHeight + margin) + 'px;left:' + Math.round(plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2) + 'px;width:' + axis.labelWidth + 'px;text-align:center" class="tickLabel">' + tick.label + "</div>";

});

addLabels(axes.yaxis, function (tick, axis) {

return '<div style="position:absolute;top:' + Math.round(plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2) + 'px;right:' + (plotOffset.right + plotWidth + margin) + 'px;width:' + axis.labelWidth + 'px;text-align:right" class="tickLabel">' + tick.label + "</div>";

});

addLabels(axes.x2axis, function (tick, axis) {

return '<div style="position:absolute;bottom:' + (plotOffset.bottom + plotHeight + margin) + 'px;left:' + Math.round(plotOffset.left + axis.p2c(tick.v) - axis.labelWidth/2) + 'px;width:' + axis.labelWidth + 'px;text-align:center" class="tickLabel">' + tick.label + "</div>";

});

addLabels(axes.y2axis, function (tick, axis) {

return '<div style="position:absolute;top:' + Math.round(plotOffset.top + axis.p2c(tick.v) - axis.labelHeight/2) + 'px;left:' + (plotOffset.left + plotWidth + margin) +'px;width:' + axis.labelWidth + 'px;text-align:left" class="tickLabel">' + tick.label + "</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),

top, lastX = 0, areaOpen = false;

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 (areaOpen && x1 != null && x2 == null) {

// close area

ctx.lineTo(axisx.p2c(lastX), axisy.p2c(bottom));

ctx.fill();

areaOpen = false;

continue;

}

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

continue;

// clip x values

// clip with xmin

if (x1 <= x2 && x1 < axisx.min) {

if (x2 < axisx.min)

continue;

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

x1 = axisx.min;

}

else if (x2 <= x1 && x2 < axisx.min) {

if (x1 < axisx.min)

continue;

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

x2 = axisx.min;

}

// clip with xmax

if (x1 >= x2 && x1 > axisx.max) {

if (x2 > axisx.max)

continue;

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

x1 = axisx.max;

}

else if (x2 >= x1 && x2 > axisx.max) {

if (x1 > axisx.max)

continue;

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

x2 = axisx.max;

}

if (!areaOpen) {

// open area

ctx.beginPath();

ctx.moveTo(axisx.p2c(x1), axisy.p2c(bottom));

areaOpen = true;

}

// now first check the case where both is outside

if (y1 >= axisy.max && y2 >= axisy.max) {

ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max));

ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max));

lastX = x2;

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));

lastX = x2;

continue;

}

// else it's a bit more complicated, there might

// be two rectangles and two triangles we need to fill

// in; to find these keep track of the current x values

var x1old = x1, x2old = x2;

// and clip the y values, without shortcutting

// 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) {

if (y1 <= axisy.min)

top = axisy.min;

else

top = axisy.max;

ctx.lineTo(axisx.p2c(x1old), axisy.p2c(top));

ctx.lineTo(axisx.p2c(x1), axisy.p2c(top));

}

// fill the triangles

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) {

if (y2 <= axisy.min)

top = axisy.min;

else

top = axisy.max;

ctx.lineTo(axisx.p2c(x2), axisy.p2c(top));

ctx.lineTo(axisx.p2c(x2old), axisy.p2c(top));

}

lastX = Math.max(x2, x2old);

}

if (areaOpen) {

ctx.lineTo(axisx.p2c(lastX), axisy.p2c(bottom));

ctx.fill();

}

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, circumference, axisx, axisy) {

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();

ctx.arc(axisx.p2c(x), axisy.p2c(y) + offset, radius, 0, circumference, false);

if (fillStyle) {

ctx.fillStyle = fillStyle;

ctx.fill();

}

ctx.stroke();

}

ctx.save();

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

var lw = series.lines.lineWidth,

sw = series.shadowSize,

radius = series.points.radius;

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, Math.PI,

series.xaxis, series.yaxis);

ctx.strokeStyle = "rgba(0,0,0,0.2)";

plotPoints(series.datapoints, radius, null, w/2, Math.PI,

series.xaxis, series.yaxis);

}

ctx.lineWidth = lw;

ctx.strokeStyle = series.color;

plotPoints(series.datapoints, radius,

getFillStyle(series.points, series.color), 0, 2 * Math.PI,

series.xaxis, series.yaxis);

ctx.restore();

}

function drawBar(x, y, b, barLeft, barRight, offset, fillStyleCallback, axisx, axisy, c, horizontal) {

var left, right, bottom, top,

drawLeft, drawRight, drawTop, drawBottom,

tmp;

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 (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;

for (var i = 0; i < points.length; i += ps) {

if (points[i] == null)

continue;

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

}

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

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 (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 (fragments.length == 0)

return;

var table = '<table style="font-size:smaller;color:' + options.grid.color + '">' + fragments.join("") + '</table>';

if (options.legend.container != null)

$(options.legend.container).html(table);

else {

var pos = "",

p = options.legend.position,

m = options.legend.margin;

if (m[0] == null)

m = [m, m];

if (p.charAt(0) == "n")

pos += 'top:' + (m[1] + plotOffset.top) + 'px;';

else if (p.charAt(0) == "s")

pos += 'bottom:' + (m[1] + plotOffset.bottom) + 'px;';

if (p.charAt(1) == "e")

pos += 'right:' + (m[0] + plotOffset.right) + 'px;';

else if (p.charAt(1) == "w")

pos += 'left:' + (m[0] + plotOffset.left) + 'px;';

var legend = $('<div class="legend">' + table.replace('style="', 'style="position:absolute;' + pos +';') + '</div>').appendTo(placeholder);

if (options.legend.backgroundOpacity != 0.0) {

// put in the transparent background

// separately to avoid blended labels and

// label boxes

var c = options.legend.backgroundColor;

if (c == null) {

c = options.grid.backgroundColor;

if (c && typeof c == "string")

c = $.color.parse(c);

else

c = $.color.extract(legend, 'background-color');

c.a = 1;

c = c.toString();

}

var div = legend.children();

$('<div style="position:absolute;width:' + div.width() + 'px;height:' + div.height() + 'px;' + pos +'background-color:' + c + ';"> </div>').prependTo(legend).css('opacity', options.legend.backgroundOpacity);

}

// 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 = 0; i < series.length; ++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;

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 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(),

pos = { pageX: event.pageX, pageY: event.pageY },

canvasX = event.pageX - offset.left - plotOffset.left,

canvasY = event.pageY - offset.top - plotOffset.top;

if (axes.xaxis.used)

pos.x = axes.xaxis.c2p(canvasX);

if (axes.yaxis.used)

pos.y = axes.yaxis.c2p(canvasY);

if (axes.x2axis.used)

pos.x2 = axes.x2axis.c2p(canvasX);

if (axes.y2axis.used)

pos.y2 = axes.y2axis.c2p(canvasY);

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 == item.datapoint))

unhighlight(h.series, h.point);

}

if (item)

highlight(item.series, item.datapoint, eventname);

}

placeholder.trigger(eventname, [ 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")

point = s.data[point];

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;

octx.beginPath();

octx.arc(axisx.p2c(x), axisy.p2c(y), radius, 0, 2 * Math.PI, false);

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);

}

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") {

c = $.color.parse(defaultColor).scale('rgb', c.brightness);

c.a *= c.opacity;

c = c.toString();

}

gradient.addColorStop(i / (l - 1), c);

}

return gradient;

}

$.plot = function(placeholder, data, options) {

var plot = new Plot($(placeholder), data, options, $.plot.plugins);

/*var t0 = new Date();

var t1 = new Date();

var tstr = "time used (msecs): " + (t1.getTime() - t0.getTime())

if (window.console)

console.log(tstr);

else

alert(tstr);*/

return plot;

};

$.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;

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;

}

r.push(c);

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);

}

})(jQuery);