X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;f=dygraph-tickers.js;h=f23c87a291ff597a9a69a285f99eda3400f2926a;hb=33b5c4b245bf29f3e908931bf70dde00b5fc8a51;hp=87c5ce5a3133f693a76e8866c61ff8159a8bb7b3;hpb=48e614acf3084b9836803f8b014bf0e65f1ca119;p=dygraphs.git diff --git a/dygraph-tickers.js b/dygraph-tickers.js index 87c5ce5..f23c87a 100644 --- a/dygraph-tickers.js +++ b/dygraph-tickers.js @@ -1,4 +1,8 @@ -// Copyright 2011 Google Inc. All Rights Reserved. +/** + * @license + * Copyright 2011 Dan Vanderkam (danvdk@gmail.com) + * MIT-licensed (http://opensource.org/licenses/MIT) + */ /** * @fileoverview Description of this file. @@ -54,17 +58,46 @@ * middle of the years. */ +/*jshint globalstrict:true, sub:true */ +/*global Dygraph:false */ +"use strict"; + +/** @typedef {Array.<{v:number, label:string, label_v:(string|undefined)}>} */ +Dygraph.TickList = undefined; // the ' = undefined' keeps jshint happy. + +/** @typedef {function( + * number, + * number, + * number, + * function(string):*, + * Dygraph=, + * Array.= + * ): Dygraph.TickList} + */ +Dygraph.Ticker = undefined; // the ' = undefined' keeps jshint happy. + +/** @type {Dygraph.Ticker} */ +Dygraph.numericLinearTicks = function(a, b, pixels, opts, dygraph, vals) { + var nonLogscaleOpts = function(opt) { + if (opt === 'logscale') return false; + return opts(opt); + }; + return Dygraph.numericTicks(a, b, pixels, nonLogscaleOpts, dygraph, vals); +}; + +/** @type {Dygraph.Ticker} */ Dygraph.numericTicks = function(a, b, pixels, opts, dygraph, vals) { - var pixels_per_tick = opts('pixelsPerLabel'); + var pixels_per_tick = /** @type{number} */(opts('pixelsPerLabel')); var ticks = []; + var i, j, tickV, nTicks; if (vals) { - for (var i = 0; i < vals.length; i++) { + for (i = 0; i < vals.length; i++) { ticks.push({v: vals[i]}); } } else { // TODO(danvk): factor this log-scale block out into a separate function. if (opts("logscale")) { - var nTicks = Math.floor(pixels / pixels_per_tick); + nTicks = Math.floor(pixels / pixels_per_tick); var minIdx = Dygraph.binarySearch(a, Dygraph.PREFERRED_LOG_TICK_VALUES, 1); var maxIdx = Dygraph.binarySearch(b, Dygraph.PREFERRED_LOG_TICK_VALUES, -1); if (minIdx == -1) { @@ -81,7 +114,7 @@ Dygraph.numericTicks = function(a, b, pixels, opts, dygraph, vals) { var tickValue = Dygraph.PREFERRED_LOG_TICK_VALUES[idx]; var pixel_coord = Math.log(tickValue / a) / Math.log(b / a) * pixels; var tick = { v: tickValue }; - if (lastDisplayed == null) { + if (lastDisplayed === null) { lastDisplayed = { tickValue : tickValue, pixel_coord : pixel_coord @@ -104,98 +137,76 @@ Dygraph.numericTicks = function(a, b, pixels, opts, dygraph, vals) { } // ticks.length won't be 0 if the log scale function finds values to insert. - if (ticks.length == 0) { + if (ticks.length === 0) { // Basic idea: // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). // The first spacing greater than pixelsPerYLabel is what we use. // TODO(danvk): version that works on a log scale. var kmg2 = opts("labelsKMG2"); + var mults, base; if (kmg2) { - var mults = [1, 2, 4, 8]; + mults = [1, 2, 4, 8, 16, 32, 64, 128, 256]; + base = 16; } else { - var mults = [1, 2, 5]; + mults = [1, 2, 5, 10, 20, 50, 100]; + base = 10; } - var scale, low_val, high_val, nTicks; - for (var i = -10; i < 50; i++) { - if (kmg2) { - var base_scale = Math.pow(16, i); - } else { - var base_scale = Math.pow(10, i); - } - for (var j = 0; j < mults.length; j++) { - scale = base_scale * mults[j]; - low_val = Math.floor(a / scale) * scale; - high_val = Math.ceil(b / scale) * scale; - nTicks = Math.abs(high_val - low_val) / scale; - var spacing = pixels / nTicks; - // wish I could break out of both loops at once... - if (spacing > pixels_per_tick) break; - } + + // Get the maximum number of permitted ticks based on the + // graph's pixel size and pixels_per_tick setting. + var max_ticks = Math.ceil(pixels / pixels_per_tick); + + // Now calculate the data unit equivalent of this tick spacing. + // Use abs() since graphs may have a reversed Y axis. + var units_per_tick = Math.abs(b - a) / max_ticks; + + // Based on this, get a starting scale which is the largest + // integer power of the chosen base (10 or 16) that still remains + // below the requested pixels_per_tick spacing. + var base_power = Math.floor(Math.log(units_per_tick) / Math.log(base)); + var base_scale = Math.pow(base, base_power); + + // Now try multiples of the starting scale until we find one + // that results in tick marks spaced sufficiently far apart. + // The "mults" array should cover the range 1 .. base^2 to + // adjust for rounding and edge effects. + var scale, low_val, high_val, spacing; + for (j = 0; j < mults.length; j++) { + scale = base_scale * mults[j]; + low_val = Math.floor(a / scale) * scale; + high_val = Math.ceil(b / scale) * scale; + nTicks = Math.abs(high_val - low_val) / scale; + spacing = pixels / nTicks; if (spacing > pixels_per_tick) break; } // Construct the set of ticks. // Allow reverse y-axis if it's explicitly requested. if (low_val > high_val) scale *= -1; - for (var i = 0; i < nTicks; i++) { - var tickV = low_val + i * scale; + for (i = 0; i <= nTicks; i++) { + tickV = low_val + i * scale; ticks.push( {v: tickV} ); } } } - // Add formatted labels to the ticks. - var k; - var k_labels = []; - if (opts("labelsKMB")) { - k = 1000; - k_labels = [ "K", "M", "B", "T" ]; - } - if (opts("labelsKMG2")) { - if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); - k = 1024; - k_labels = [ "k", "M", "G", "T" ]; - } - - var formatter = opts('axisLabelFormatter'); + var formatter = /**@type{AxisLabelFormatter}*/(opts('axisLabelFormatter')); // Add labels to the ticks. - for (var i = 0; i < ticks.length; i++) { + for (i = 0; i < ticks.length; i++) { if (ticks[i].label !== undefined) continue; // Use current label. - var tickV = ticks[i].v; - var absTickV = Math.abs(tickV); // TODO(danvk): set granularity to something appropriate here. - var label = formatter(tickV, 0, opts, dygraph); - if (k_labels.length > 0) { - // TODO(danvk): should this be integrated into the axisLabelFormatter? - // Round up to an appropriate unit. - var n = k*k*k*k; - for (var j = 3; j >= 0; j--, n /= k) { - if (absTickV >= n) { - label = Dygraph.round_(tickV / n, opts('digitsAfterDecimal')) + - k_labels[j]; - break; - } - } - } - ticks[i].label = label; + ticks[i].label = formatter(ticks[i].v, 0, opts, dygraph); } return ticks; }; +/** @type {Dygraph.Ticker} */ Dygraph.dateTicker = function(a, b, pixels, opts, dygraph, vals) { - var pixels_per_tick = opts('pixelsPerLabel'); - var chosen = -1; - for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { - var num_ticks = Dygraph.numDateTicks(a, b, i); - if (pixels / num_ticks >= pixels_per_tick) { - chosen = i; - break; - } - } + var chosen = Dygraph.pickDateTickGranularity(a, b, pixels, opts); if (chosen >= 0) { return Dygraph.getDateAxis(a, b, chosen, opts, dygraph); @@ -206,6 +217,7 @@ Dygraph.dateTicker = function(a, b, pixels, opts, dygraph, vals) { }; // Time granularity enumeration +// TODO(danvk): make this an @enum Dygraph.SECONDLY = 0; Dygraph.TWO_SECONDLY = 1; Dygraph.FIVE_SECONDLY = 2; @@ -229,29 +241,49 @@ Dygraph.DECADAL = 19; Dygraph.CENTENNIAL = 20; Dygraph.NUM_GRANULARITIES = 21; -Dygraph.SHORT_SPACINGS = []; -Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; -Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; -Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; -Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; -Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; -Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; -Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; -Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; -Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; -Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; -Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; -Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; -Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; -Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; -Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; +// Date components enumeration (in the order of the arguments in Date) +// TODO: make this an @enum +Dygraph.DATEFIELD_Y = 0; +Dygraph.DATEFIELD_M = 1; +Dygraph.DATEFIELD_D = 2; +Dygraph.DATEFIELD_HH = 3; +Dygraph.DATEFIELD_MM = 4; +Dygraph.DATEFIELD_SS = 5; +Dygraph.DATEFIELD_MS = 6; +Dygraph.NUM_DATEFIELDS = 7; + + +/** @type {Array.<{datefield:number, step:number, spacing:number}>} */ +Dygraph.TICK_PLACEMENT = []; +Dygraph.TICK_PLACEMENT[Dygraph.SECONDLY] = {datefield: Dygraph.DATEFIELD_SS, step: 1, spacing: 1000 * 1}; +Dygraph.TICK_PLACEMENT[Dygraph.TWO_SECONDLY] = {datefield: Dygraph.DATEFIELD_SS, step: 2, spacing: 1000 * 2}; +Dygraph.TICK_PLACEMENT[Dygraph.FIVE_SECONDLY] = {datefield: Dygraph.DATEFIELD_SS, step: 5, spacing: 1000 * 5}; +Dygraph.TICK_PLACEMENT[Dygraph.TEN_SECONDLY] = {datefield: Dygraph.DATEFIELD_SS, step: 10, spacing: 1000 * 10}; +Dygraph.TICK_PLACEMENT[Dygraph.THIRTY_SECONDLY] = {datefield: Dygraph.DATEFIELD_SS, step: 30, spacing: 1000 * 30}; +Dygraph.TICK_PLACEMENT[Dygraph.MINUTELY] = {datefield: Dygraph.DATEFIELD_MM, step: 1, spacing: 1000 * 60}; +Dygraph.TICK_PLACEMENT[Dygraph.TWO_MINUTELY] = {datefield: Dygraph.DATEFIELD_MM, step: 2, spacing: 1000 * 60 * 2}; +Dygraph.TICK_PLACEMENT[Dygraph.FIVE_MINUTELY] = {datefield: Dygraph.DATEFIELD_MM, step: 5, spacing: 1000 * 60 * 5}; +Dygraph.TICK_PLACEMENT[Dygraph.TEN_MINUTELY] = {datefield: Dygraph.DATEFIELD_MM, step: 10, spacing: 1000 * 60 * 10}; +Dygraph.TICK_PLACEMENT[Dygraph.THIRTY_MINUTELY] = {datefield: Dygraph.DATEFIELD_MM, step: 30, spacing: 1000 * 60 * 30}; +Dygraph.TICK_PLACEMENT[Dygraph.HOURLY] = {datefield: Dygraph.DATEFIELD_HH, step: 1, spacing: 1000 * 3600}; +Dygraph.TICK_PLACEMENT[Dygraph.TWO_HOURLY] = {datefield: Dygraph.DATEFIELD_HH, step: 2, spacing: 1000 * 3600 * 2}; +Dygraph.TICK_PLACEMENT[Dygraph.SIX_HOURLY] = {datefield: Dygraph.DATEFIELD_HH, step: 6, spacing: 1000 * 3600 * 6}; +Dygraph.TICK_PLACEMENT[Dygraph.DAILY] = {datefield: Dygraph.DATEFIELD_D, step: 1, spacing: 1000 * 86400}; +Dygraph.TICK_PLACEMENT[Dygraph.WEEKLY] = {datefield: Dygraph.DATEFIELD_D, step: 7, spacing: 1000 * 604800}; +Dygraph.TICK_PLACEMENT[Dygraph.MONTHLY] = {datefield: Dygraph.DATEFIELD_M, step: 1, spacing: 1000 * 7200 * 365.2524}; // 1e3 * 60 * 60 * 24 * 365.2524 / 12 +Dygraph.TICK_PLACEMENT[Dygraph.QUARTERLY] = {datefield: Dygraph.DATEFIELD_M, step: 3, spacing: 1000 * 21600 * 365.2524}; // 1e3 * 60 * 60 * 24 * 365.2524 / 4 +Dygraph.TICK_PLACEMENT[Dygraph.BIANNUAL] = {datefield: Dygraph.DATEFIELD_M, step: 6, spacing: 1000 * 43200 * 365.2524}; // 1e3 * 60 * 60 * 24 * 365.2524 / 2 +Dygraph.TICK_PLACEMENT[Dygraph.ANNUAL] = {datefield: Dygraph.DATEFIELD_Y, step: 1, spacing: 1000 * 86400 * 365.2524}; // 1e3 * 60 * 60 * 24 * 365.2524 * 1 +Dygraph.TICK_PLACEMENT[Dygraph.DECADAL] = {datefield: Dygraph.DATEFIELD_Y, step: 10, spacing: 1000 * 864000 * 365.2524}; // 1e3 * 60 * 60 * 24 * 365.2524 * 10 +Dygraph.TICK_PLACEMENT[Dygraph.CENTENNIAL] = {datefield: Dygraph.DATEFIELD_Y, step: 100, spacing: 1000 * 8640000 * 365.2524}; // 1e3 * 60 * 60 * 24 * 365.2524 * 100 + /** - * @private * This is a list of human-friendly values at which to show tick marks on a log * scale. It is k * 10^n, where k=1..9 and n=-39..+39, so: * ..., 1, 2, 3, 4, 5, ..., 9, 10, 20, 30, ..., 90, 100, 200, 300, ... * NOTE: this assumes that Dygraph.LOG_SCALE = 10. + * @type {Array.} */ Dygraph.PREFERRED_LOG_TICK_VALUES = function() { var vals = []; @@ -265,113 +297,143 @@ Dygraph.PREFERRED_LOG_TICK_VALUES = function() { return vals; }(); -Dygraph.numDateTicks = function(start_time, end_time, granularity) { - if (granularity < Dygraph.MONTHLY) { - // Generate one tick mark for every fixed interval of time. - var spacing = Dygraph.SHORT_SPACINGS[granularity]; - return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); - } else { - var year_mod = 1; // e.g. to only print one point every 10 years. - var num_months = 12; - if (granularity == Dygraph.QUARTERLY) num_months = 3; - if (granularity == Dygraph.BIANNUAL) num_months = 2; - if (granularity == Dygraph.ANNUAL) num_months = 1; - if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } - if (granularity == Dygraph.CENTENNIAL) { num_months = 1; year_mod = 100; } - - var msInYear = 365.2524 * 24 * 3600 * 1000; - var num_years = 1.0 * (end_time - start_time) / msInYear; - return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); +/** + * Determine the correct granularity of ticks on a date axis. + * + * @param {number} a Left edge of the chart (ms) + * @param {number} b Right edge of the chart (ms) + * @param {number} pixels Size of the chart in the relevant dimension (width). + * @param {function(string):*} opts Function mapping from option name -> value. + * @return {number} The appropriate axis granularity for this chart. See the + * enumeration of possible values in dygraph-tickers.js. + */ +Dygraph.pickDateTickGranularity = function(a, b, pixels, opts) { + var pixels_per_tick = /** @type{number} */(opts('pixelsPerLabel')); + for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { + var num_ticks = Dygraph.numDateTicks(a, b, i); + if (pixels / num_ticks >= pixels_per_tick) { + return i; + } } + return -1; }; +/** + * Compute the number of ticks on a date axis for a given granularity. + * @param {number} start_time + * @param {number} end_time + * @param {number} granularity (one of the granularities enumerated above) + * @return {number} (Approximate) number of ticks that would result. + */ +Dygraph.numDateTicks = function(start_time, end_time, granularity) { + var spacing = Dygraph.TICK_PLACEMENT[granularity].spacing; + return Math.round(1.0 * (end_time - start_time) / spacing); +}; + +/** + * Compute the positions and labels of ticks on a date axis for a given granularity. + * @param {number} start_time + * @param {number} end_time + * @param {number} granularity (one of the granularities enumerated above) + * @param {function(string):*} opts Function mapping from option name -> value. + * @param {Dygraph=} dg + * @return {!Dygraph.TickList} + */ Dygraph.getDateAxis = function(start_time, end_time, granularity, opts, dg) { - var formatter = opts("axisLabelFormatter"); - var ticks = []; - if (granularity < Dygraph.MONTHLY) { - // Generate one tick mark for every fixed interval of time. - var spacing = Dygraph.SHORT_SPACINGS[granularity]; - var format = '%d%b'; // e.g. "1Jan" - - // Find a time less than start_time which occurs on a "nice" time boundary - // for this granularity. - var g = spacing / 1000; - var d = new Date(start_time); - if (g <= 60) { // seconds - var x = d.getSeconds(); d.setSeconds(x - x % g); - } else { - d.setSeconds(0); - g /= 60; - if (g <= 60) { // minutes - var x = d.getMinutes(); d.setMinutes(x - x % g); - } else { - d.setMinutes(0); - g /= 60; + var formatter = /** @type{AxisLabelFormatter} */( + opts("axisLabelFormatter")); + var utc = opts("labelsUTC"); + var accessors = utc ? Dygraph.DateAccessorsUTC : Dygraph.DateAccessorsLocal; - if (g <= 24) { // days - var x = d.getHours(); d.setHours(x - x % g); - } else { - d.setHours(0); - g /= 24; + var datefield = Dygraph.TICK_PLACEMENT[granularity].datefield; + var step = Dygraph.TICK_PLACEMENT[granularity].step; + var spacing = Dygraph.TICK_PLACEMENT[granularity].spacing; - if (g == 7) { // one week - d.setDate(d.getDate() - d.getDay()); - } - } - } - } - start_time = d.getTime(); + // Choose a nice tick position before the initial instant. + // Currently, this code deals properly with the existent daily granularities: + // DAILY (with step of 1) and WEEKLY (with step of 7 but specially handled). + // Other daily granularities (say TWO_DAILY) should also be handled specially + // by setting the start_date_offset to 0. + var start_date = new Date(start_time); + var date_array = []; + date_array[Dygraph.DATEFIELD_Y] = accessors.getFullYear(start_date); + date_array[Dygraph.DATEFIELD_M] = accessors.getMonth(start_date); + date_array[Dygraph.DATEFIELD_D] = accessors.getDate(start_date); + date_array[Dygraph.DATEFIELD_HH] = accessors.getHours(start_date); + date_array[Dygraph.DATEFIELD_MM] = accessors.getMinutes(start_date); + date_array[Dygraph.DATEFIELD_SS] = accessors.getSeconds(start_date); + date_array[Dygraph.DATEFIELD_MS] = accessors.getMilliseconds(start_date); - for (var t = start_time; t <= end_time; t += spacing) { - ticks.push({ v:t, - label: formatter(new Date(t), granularity, opts, dg) + var start_date_offset = date_array[datefield] % step; + if (granularity == Dygraph.WEEKLY) { + // This will put the ticks on Sundays. + start_date_offset = accessors.getDay(start_date); + } + + date_array[datefield] -= start_date_offset; + for (var df = datefield + 1; df < Dygraph.NUM_DATEFIELDS; df++) { + // The minimum value is 1 for the day of month, and 0 for all other fields. + date_array[df] = (df === Dygraph.DATEFIELD_D) ? 1 : 0; + } + + // Generate the ticks. + // For granularities not coarser than HOURLY we use the fact that: + // the number of milliseconds between ticks is constant + // and equal to the defined spacing. + // Otherwise we rely on the 'roll over' property of the Date functions: + // when some date field is set to a value outside of its logical range, + // the excess 'rolls over' the next (more significant) field. + // However, when using local time with DST transitions, + // there are dates that do not represent any time value at all + // (those in the hour skipped at the 'spring forward'), + // and the JavaScript engines usually return an equivalent value. + // Hence we have to check that the date is properly increased at each step, + // returning a date at a nice tick position. + var ticks = []; + var tick_date = accessors.makeDate.apply(null, date_array); + var tick_time = tick_date.getTime(); + if (granularity <= Dygraph.HOURLY) { + if (tick_time < start_time) { + tick_time += spacing; + tick_date = new Date(tick_time); + } + while (tick_time <= end_time) { + ticks.push({ v: tick_time, + label: formatter(tick_date, granularity, opts, dg) }); + tick_time += spacing; + tick_date = new Date(tick_time); } } else { - // Display a tick mark on the first of a set of months of each year. - // Years get a tick mark iff y % year_mod == 0. This is useful for - // displaying a tick mark once every 10 years, say, on long time scales. - var months; - var year_mod = 1; // e.g. to only print one point every 10 years. - - if (granularity == Dygraph.MONTHLY) { - months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; - } else if (granularity == Dygraph.QUARTERLY) { - months = [ 0, 3, 6, 9 ]; - } else if (granularity == Dygraph.BIANNUAL) { - months = [ 0, 6 ]; - } else if (granularity == Dygraph.ANNUAL) { - months = [ 0 ]; - } else if (granularity == Dygraph.DECADAL) { - months = [ 0 ]; - year_mod = 10; - } else if (granularity == Dygraph.CENTENNIAL) { - months = [ 0 ]; - year_mod = 100; - } else { - Dygraph.warn("Span of dates is too long"); + if (tick_time < start_time) { + date_array[datefield] += step; + tick_date = accessors.makeDate.apply(null, date_array); + tick_time = tick_date.getTime(); } - - var start_year = new Date(start_time).getFullYear(); - var end_year = new Date(end_time).getFullYear(); - var zeropad = Dygraph.zeropad; - for (var i = start_year; i <= end_year; i++) { - if (i % year_mod != 0) continue; - for (var j = 0; j < months.length; j++) { - var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; - var t = Dygraph.dateStrToMillis(date_str); - if (t < start_time || t > end_time) continue; - ticks.push({ v:t, - label: formatter(new Date(t), granularity, opts, dg) + while (tick_time <= end_time) { + if (granularity >= Dygraph.DAILY || + accessors.getHours(tick_date) % step === 0) { + ticks.push({ v: tick_time, + label: formatter(tick_date, granularity, opts, dg) }); } + date_array[datefield] += step; + tick_date = accessors.makeDate.apply(null, date_array); + tick_time = tick_date.getTime(); } } - return ticks; }; -// These are set here so that this file can be included after dygraph.js. -Dygraph.DEFAULT_ATTRS.axes.x.ticker = Dygraph.dateTicker; -Dygraph.DEFAULT_ATTRS.axes.y.ticker = Dygraph.numericTicks; -Dygraph.DEFAULT_ATTRS.axes.y2.ticker = Dygraph.numericTicks; +// These are set here so that this file can be included after dygraph.js +// or independently. +if (Dygraph && + Dygraph.DEFAULT_ATTRS && + Dygraph.DEFAULT_ATTRS['axes'] && + Dygraph.DEFAULT_ATTRS['axes']['x'] && + Dygraph.DEFAULT_ATTRS['axes']['y'] && + Dygraph.DEFAULT_ATTRS['axes']['y2']) { + Dygraph.DEFAULT_ATTRS['axes']['x']['ticker'] = Dygraph.dateTicker; + Dygraph.DEFAULT_ATTRS['axes']['y']['ticker'] = Dygraph.numericTicks; + Dygraph.DEFAULT_ATTRS['axes']['y2']['ticker'] = Dygraph.numericTicks; +}