* middle of the years.
*/
-/*jshint globalstrict:true, sub:true */
+/*jshint sub:true */
/*global Dygraph:false */
+(function() {
"use strict";
/** @typedef {Array.<{v:number, label:string, label_v:(string|undefined)}>} */
// Construct the set of ticks.
// Allow reverse y-axis if it's explicitly requested.
if (low_val > high_val) scale *= -1;
- for (i = 0; i < nTicks; i++) {
+ for (i = 0; i <= nTicks; i++) {
tickV = low_val + i * scale;
ticks.push( {v: tickV} );
}
Dygraph.TWO_HOURLY = 11;
Dygraph.SIX_HOURLY = 12;
Dygraph.DAILY = 13;
-Dygraph.WEEKLY = 14;
-Dygraph.MONTHLY = 15;
-Dygraph.QUARTERLY = 16;
-Dygraph.BIANNUAL = 17;
-Dygraph.ANNUAL = 18;
-Dygraph.DECADAL = 19;
-Dygraph.CENTENNIAL = 20;
-Dygraph.NUM_GRANULARITIES = 21;
-
-/** @type {Array.<number>} */
-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;
+Dygraph.TWO_DAILY = 14;
+Dygraph.WEEKLY = 15;
+Dygraph.MONTHLY = 16;
+Dygraph.QUARTERLY = 17;
+Dygraph.BIANNUAL = 18;
+Dygraph.ANNUAL = 19;
+Dygraph.DECADAL = 20;
+Dygraph.CENTENNIAL = 21;
+Dygraph.NUM_GRANULARITIES = 22;
+
+// 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;
+
+
+/**
+ * The value of datefield will start at an even multiple of "step", i.e.
+ * if datefield=SS and step=5 then the first tick will be on a multiple of 5s.
+ *
+ * For granularities <= HOURLY, ticks are generated every `spacing` ms.
+ *
+ * At coarser granularities, ticks are generated by incrementing `datefield` by
+ * `step`. In this case, the `spacing` value is only used to estimate the
+ * number of ticks. It should roughly correspond to the spacing between
+ * adjacent ticks.
+ *
+ * @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.TWO_DAILY] = {datefield: Dygraph.DATEFIELD_D, step: 2, spacing: 1000 * 86400 * 2};
+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
+
/**
* This is a list of human-friendly values at which to show tick marks on a log
* NOTE: this assumes that Dygraph.LOG_SCALE = 10.
* @type {Array.<number>}
*/
-Dygraph.PREFERRED_LOG_TICK_VALUES = function() {
+Dygraph.PREFERRED_LOG_TICK_VALUES = (function() {
var vals = [];
for (var power = -39; power <= 39; power++) {
var range = Math.pow(10, power);
}
}
return vals;
-}();
+})();
/**
* 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.
+ * @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.
*/
};
/**
+ * 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} Number of ticks that would result.
+ * @return {number} (Approximate) number of ticks that would result.
*/
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);
- }
+ 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)
Dygraph.getDateAxis = function(start_time, end_time, granularity, opts, dg) {
var formatter = /** @type{AxisLabelFormatter} */(
opts("axisLabelFormatter"));
- var ticks = [];
- var t;
-
- if (granularity < Dygraph.MONTHLY) {
- // Generate one tick mark for every fixed interval of time.
- var spacing = Dygraph.SHORT_SPACINGS[granularity];
-
- // 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);
- d.setMilliseconds(0);
- var x;
- if (g <= 60) { // seconds
- x = d.getSeconds(); d.setSeconds(x - x % g);
- } else {
- d.setSeconds(0);
- g /= 60;
- if (g <= 60) { // minutes
- x = d.getMinutes(); d.setMinutes(x - x % g);
- } else {
- d.setMinutes(0);
- g /= 60;
-
- if (g <= 24) { // days
- x = d.getHours(); d.setHours(x - x % g);
- } else {
- d.setHours(0);
- g /= 24;
+ var utc = opts("labelsUTC");
+ var accessors = utc ? Dygraph.DateAccessorsUTC : Dygraph.DateAccessorsLocal;
+
+ var datefield = Dygraph.TICK_PLACEMENT[granularity].datefield;
+ var step = Dygraph.TICK_PLACEMENT[granularity].step;
+ var spacing = Dygraph.TICK_PLACEMENT[granularity].spacing;
+
+ // 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);
+
+ 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;
+ }
- if (g == 7) { // one week
- d.setDate(d.getDate() - d.getDay());
- }
- }
- }
+ // 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);
}
- start_time = d.getTime();
-
- var start_offset_min = new Date(start_time).getTimezoneOffset();
- for (t = start_time; t <= end_time; t += spacing) {
- var d = new Date(t);
-
- // This ensures that we stay on the same hourly "rhythm" across
- // daylight savings transitions. Without this, the ticks could get off
- // by an hour. See tests/daylight-savings.html or issue 147.
- if (d.getTimezoneOffset() != start_offset_min) {
- t += (d.getTimezoneOffset() - start_offset_min) * 60 * 1000;
- d = new Date(t);
- start_offset_min = d.getTimezoneOffset();
- }
-
- ticks.push({ v:t,
- label: formatter(d, granularity, opts, dg)
+ 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 ];
- } 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";
- 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
// or independently.
-Dygraph.DEFAULT_ATTRS = Dygraph.DEFAULT_ATTRS || {};
-Dygraph.DEFAULT_ATTRS['axes'] = Dygraph.DEFAULT_ATTRS['axes'] || {};
-Dygraph.DEFAULT_ATTRS['axes']['x'] = Dygraph.DEFAULT_ATTRS['axes']['x'] || {};
-Dygraph.DEFAULT_ATTRS['axes']['y'] = Dygraph.DEFAULT_ATTRS['axes']['y'] || {};
-Dygraph.DEFAULT_ATTRS['axes']['y2'] = 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;
+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;
+}
+
+})();
projects / dygraphs.git / blobdiff