-// 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.
* 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.<number>=
+ * ): 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');
+ // This masks some numeric issues in older versions of Firefox,
+ // where 1.0/Math.pow(10,2) != Math.pow(10,-2).
+ /** @type {function(number,number):number} */
+ var pow = function(base, exp) {
+ if (exp < 0) {
+ return 1.0 / Math.pow(base, -exp);
+ }
+ return Math.pow(base, exp);
+ };
+
+ 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) {
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
}
// 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 = [];
+ var m_labels = [];
if (opts("labelsKMB")) {
k = 1000;
- k_labels = [ "K", "M", "B", "T" ];
+ k_labels = [ "K", "M", "B", "T", "Q" ];
}
if (opts("labelsKMG2")) {
- if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!");
+ if (k) Dygraph.warn("Setting both labelsKMB and labelsKMG2. Pick one!");
k = 1024;
- k_labels = [ "k", "M", "G", "T" ];
+ k_labels = [ "k", "M", "G", "T", "P", "E", "Z", "Y" ];
+ m_labels = [ "m", "u", "n", "p", "f", "a", "z", "y" ];
}
- var formatter = opts('axisLabelFormatter');
+ k = k || 1; // If neither option is specified.
+
+ var formatter = /**@type{AxisLabelFormatter}*/(opts('axisLabelFormatter'));
// Add labels to the ticks.
- for (var i = 0; i < ticks.length; i++) {
+ var digitsAfterDecimal = /** @type{number} */(opts('digitsAfterDecimal'));
+ for (i = 0; i < ticks.length; i++) {
if (ticks[i].label !== undefined) continue; // Use current label.
- var tickV = ticks[i].v;
+ 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) {
+ var n = pow(k, k_labels.length);
+ for (j = k_labels.length - 1; j >= 0; j--, n /= k) {
if (absTickV >= n) {
- label = Dygraph.round_(tickV / n, opts('digitsAfterDecimal')) +
- k_labels[j];
+ label = Dygraph.round_(tickV / n, digitsAfterDecimal) + k_labels[j];
break;
}
}
}
+ if(opts("labelsKMG2")){
+ tickV = String(tickV.toExponential());
+ if(tickV.split('e-').length === 2 && tickV.split('e-')[1] >= 3 && tickV.split('e-')[1] <= 24){
+ if(tickV.split('e-')[1] % 3 > 0) {
+ label = Dygraph.round_(tickV.split('e-')[0] /
+ pow(10,(tickV.split('e-')[1] % 3)),
+ digitsAfterDecimal);
+ } else {
+ label = Number(tickV.split('e-')[0]).toFixed(2);
+ }
+ label += m_labels[Math.floor(tickV.split('e-')[1] / 3) - 1];
+ }
+ }
ticks[i].label = label;
}
};
+/** @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);
};
// Time granularity enumeration
+// TODO(danvk): make this an @enum
Dygraph.SECONDLY = 0;
Dygraph.TWO_SECONDLY = 1;
Dygraph.FIVE_SECONDLY = 2;
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.WEEKLY] = 1000 * 604800;
/**
- * @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.<number>}
*/
Dygraph.PREFERRED_LOG_TICK_VALUES = function() {
var vals = [];
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.
+ * @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;
+};
+
+/**
+ * @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.
+ */
Dygraph.numDateTicks = function(start_time, end_time, granularity) {
if (granularity < Dygraph.MONTHLY) {
// Generate one tick mark for every fixed interval of time.
}
};
+/**
+ * @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 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];
- 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);
+ d.setMilliseconds(0);
+ var x;
if (g <= 60) { // seconds
- var x = d.getSeconds(); d.setSeconds(x - x % g);
+ 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);
+ x = d.getMinutes(); d.setMinutes(x - x % g);
} else {
d.setMinutes(0);
g /= 60;
if (g <= 24) { // days
- var x = d.getHours(); d.setHours(x - x % g);
+ x = d.getHours(); d.setHours(x - x % g);
} else {
d.setHours(0);
g /= 24;
}
start_time = d.getTime();
- for (var t = start_time; t <= end_time; t += spacing) {
+ for (t = start_time; t <= end_time; t += spacing) {
ticks.push({ v:t,
label: formatter(new Date(t), granularity, opts, dg)
});
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 ];
+ 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) {
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;
+ 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);
+ 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)
};
// 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;
+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