--- /dev/null
+/**
+ * @license
+ * Copyright 2006 Dan Vanderkam (danvdk@gmail.com)
+ * MIT-licensed (http://opensource.org/licenses/MIT)
+ */
+
+/**
+ * @fileoverview Creates an interactive, zoomable graph based on a CSV file or
+ * string. Dygraph can handle multiple series with or without error bars. The
+ * date/value ranges will be automatically set. Dygraph uses the
+ * <canvas> tag, so it only works in FF1.5+.
+ * @author danvdk@gmail.com (Dan Vanderkam)
+
+ Usage:
+ <div id="graphdiv" style="width:800px; height:500px;"></div>
+ <script type="text/javascript">
+ new Dygraph(document.getElementById("graphdiv"),
+ "datafile.csv", // CSV file with headers
+ { }); // options
+ </script>
+
+ The CSV file is of the form
+
+ Date,SeriesA,SeriesB,SeriesC
+ YYYYMMDD,A1,B1,C1
+ YYYYMMDD,A2,B2,C2
+
+ If the 'errorBars' option is set in the constructor, the input should be of
+ the form
+ Date,SeriesA,SeriesB,...
+ YYYYMMDD,A1,sigmaA1,B1,sigmaB1,...
+ YYYYMMDD,A2,sigmaA2,B2,sigmaB2,...
+
+ If the 'fractions' option is set, the input should be of the form:
+
+ Date,SeriesA,SeriesB,...
+ YYYYMMDD,A1/B1,A2/B2,...
+ YYYYMMDD,A1/B1,A2/B2,...
+
+ And error bars will be calculated automatically using a binomial distribution.
+
+ For further documentation and examples, see http://dygraphs.com/
+
+ */
+
+// For "production" code, this gets set to false by uglifyjs.
+if (typeof(DEBUG) === 'undefined') DEBUG=true;
+
+var Dygraph = (function() {
+/*global DygraphLayout:false, DygraphCanvasRenderer:false, DygraphOptions:false, G_vmlCanvasManager:false,ActiveXObject:false */
+"use strict";
+
+/**
+ * Creates an interactive, zoomable chart.
+ *
+ * @constructor
+ * @param {div | String} div A div or the id of a div into which to construct
+ * the chart.
+ * @param {String | Function} file A file containing CSV data or a function
+ * that returns this data. The most basic expected format for each line is
+ * "YYYY/MM/DD,val1,val2,...". For more information, see
+ * http://dygraphs.com/data.html.
+ * @param {Object} attrs Various other attributes, e.g. errorBars determines
+ * whether the input data contains error ranges. For a complete list of
+ * options, see http://dygraphs.com/options.html.
+ */
+var Dygraph = function(div, data, opts, opt_fourth_param) {
+ // These have to go above the "Hack for IE" in __init__ since .ready() can be
+ // called as soon as the constructor returns. Once support for OldIE is
+ // dropped, this can go down with the rest of the initializers.
+ this.is_initial_draw_ = true;
+ this.readyFns_ = [];
+
+ if (opt_fourth_param !== undefined) {
+ // Old versions of dygraphs took in the series labels as a constructor
+ // parameter. This doesn't make sense anymore, but it's easy to continue
+ // to support this usage.
+ console.warn("Using deprecated four-argument dygraph constructor");
+ this.__old_init__(div, data, opts, opt_fourth_param);
+ } else {
+ this.__init__(div, data, opts);
+ }
+};
+
+Dygraph.NAME = "Dygraph";
+Dygraph.VERSION = "1.1.0";
+Dygraph.__repr__ = function() {
+ return "[" + Dygraph.NAME + " " + Dygraph.VERSION + "]";
+};
+
+/**
+ * Returns information about the Dygraph class.
+ */
+Dygraph.toString = function() {
+ return Dygraph.__repr__();
+};
+
+// Various default values
+Dygraph.DEFAULT_ROLL_PERIOD = 1;
+Dygraph.DEFAULT_WIDTH = 480;
+Dygraph.DEFAULT_HEIGHT = 320;
+
+// For max 60 Hz. animation:
+Dygraph.ANIMATION_STEPS = 12;
+Dygraph.ANIMATION_DURATION = 200;
+
+// Label constants for the labelsKMB and labelsKMG2 options.
+// (i.e. '100000' -> '100K')
+Dygraph.KMB_LABELS = [ 'K', 'M', 'B', 'T', 'Q' ];
+Dygraph.KMG2_BIG_LABELS = [ 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y' ];
+Dygraph.KMG2_SMALL_LABELS = [ 'm', 'u', 'n', 'p', 'f', 'a', 'z', 'y' ];
+
+// These are defined before DEFAULT_ATTRS so that it can refer to them.
+/**
+ * @private
+ * Return a string version of a number. This respects the digitsAfterDecimal
+ * and maxNumberWidth options.
+ * @param {number} x The number to be formatted
+ * @param {Dygraph} opts An options view
+ */
+Dygraph.numberValueFormatter = function(x, opts) {
+ var sigFigs = opts('sigFigs');
+
+ if (sigFigs !== null) {
+ // User has opted for a fixed number of significant figures.
+ return Dygraph.floatFormat(x, sigFigs);
+ }
+
+ var digits = opts('digitsAfterDecimal');
+ var maxNumberWidth = opts('maxNumberWidth');
+
+ var kmb = opts('labelsKMB');
+ var kmg2 = opts('labelsKMG2');
+
+ var label;
+
+ // switch to scientific notation if we underflow or overflow fixed display.
+ if (x !== 0.0 &&
+ (Math.abs(x) >= Math.pow(10, maxNumberWidth) ||
+ Math.abs(x) < Math.pow(10, -digits))) {
+ label = x.toExponential(digits);
+ } else {
+ label = '' + Dygraph.round_(x, digits);
+ }
+
+ if (kmb || kmg2) {
+ var k;
+ var k_labels = [];
+ var m_labels = [];
+ if (kmb) {
+ k = 1000;
+ k_labels = Dygraph.KMB_LABELS;
+ }
+ if (kmg2) {
+ if (kmb) console.warn("Setting both labelsKMB and labelsKMG2. Pick one!");
+ k = 1024;
+ k_labels = Dygraph.KMG2_BIG_LABELS;
+ m_labels = Dygraph.KMG2_SMALL_LABELS;
+ }
+
+ var absx = Math.abs(x);
+ var n = Dygraph.pow(k, k_labels.length);
+ for (var j = k_labels.length - 1; j >= 0; j--, n /= k) {
+ if (absx >= n) {
+ label = Dygraph.round_(x / n, digits) + k_labels[j];
+ break;
+ }
+ }
+ if (kmg2) {
+ // TODO(danvk): clean up this logic. Why so different than kmb?
+ var x_parts = String(x.toExponential()).split('e-');
+ if (x_parts.length === 2 && x_parts[1] >= 3 && x_parts[1] <= 24) {
+ if (x_parts[1] % 3 > 0) {
+ label = Dygraph.round_(x_parts[0] /
+ Dygraph.pow(10, (x_parts[1] % 3)),
+ digits);
+ } else {
+ label = Number(x_parts[0]).toFixed(2);
+ }
+ label += m_labels[Math.floor(x_parts[1] / 3) - 1];
+ }
+ }
+ }
+
+ return label;
+};
+
+/**
+ * variant for use as an axisLabelFormatter.
+ * @private
+ */
+Dygraph.numberAxisLabelFormatter = function(x, granularity, opts) {
+ return Dygraph.numberValueFormatter.call(this, x, opts);
+};
+
+/**
+ * @type {!Array.<string>}
+ * @private
+ * @constant
+ */
+Dygraph.SHORT_MONTH_NAMES_ = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
+
+
+/**
+ * Convert a JS date to a string appropriate to display on an axis that
+ * is displaying values at the stated granularity. This respects the
+ * labelsUTC option.
+ * @param {Date} date The date to format
+ * @param {number} granularity One of the Dygraph granularity constants
+ * @param {Dygraph} opts An options view
+ * @return {string} The date formatted as local time
+ * @private
+ */
+Dygraph.dateAxisLabelFormatter = function(date, granularity, opts) {
+ var utc = opts('labelsUTC');
+ var accessors = utc ? Dygraph.DateAccessorsUTC : Dygraph.DateAccessorsLocal;
+
+ var year = accessors.getFullYear(date),
+ month = accessors.getMonth(date),
+ day = accessors.getDate(date),
+ hours = accessors.getHours(date),
+ mins = accessors.getMinutes(date),
+ secs = accessors.getSeconds(date),
+ millis = accessors.getSeconds(date);
+
+ if (granularity >= Dygraph.DECADAL) {
+ return '' + year;
+ } else if (granularity >= Dygraph.MONTHLY) {
+ return Dygraph.SHORT_MONTH_NAMES_[month] + ' ' + year;
+ } else {
+ var frac = hours * 3600 + mins * 60 + secs + 1e-3 * millis;
+ if (frac === 0 || granularity >= Dygraph.DAILY) {
+ // e.g. '21 Jan' (%d%b)
+ return Dygraph.zeropad(day) + ' ' + Dygraph.SHORT_MONTH_NAMES_[month];
+ } else {
+ return Dygraph.hmsString_(hours, mins, secs);
+ }
+ }
+};
+// alias in case anyone is referencing the old method.
+Dygraph.dateAxisFormatter = Dygraph.dateAxisLabelFormatter;
+
+/**
+ * Return a string version of a JS date for a value label. This respects the
+ * labelsUTC option.
+ * @param {Date} date The date to be formatted
+ * @param {Dygraph} opts An options view
+ * @private
+ */
+Dygraph.dateValueFormatter = function(d, opts) {
+ return Dygraph.dateString_(d, opts('labelsUTC'));
+};
+
+/**
+ * Standard plotters. These may be used by clients.
+ * Available plotters are:
+ * - Dygraph.Plotters.linePlotter: draws central lines (most common)
+ * - Dygraph.Plotters.errorPlotter: draws error bars
+ * - Dygraph.Plotters.fillPlotter: draws fills under lines (used with fillGraph)
+ *
+ * By default, the plotter is [fillPlotter, errorPlotter, linePlotter].
+ * This causes all the lines to be drawn over all the fills/error bars.
+ */
+Dygraph.Plotters = DygraphCanvasRenderer._Plotters;
+
+
+// Default attribute values.
+Dygraph.DEFAULT_ATTRS = {
+ highlightCircleSize: 3,
+ highlightSeriesOpts: null,
+ highlightSeriesBackgroundAlpha: 0.5,
+
+ labelsDivWidth: 250,
+ labelsDivStyles: {
+ // TODO(danvk): move defaults from createStatusMessage_ here.
+ },
+ labelsSeparateLines: false,
+ labelsShowZeroValues: true,
+ labelsKMB: false,
+ labelsKMG2: false,
+ showLabelsOnHighlight: true,
+
+ digitsAfterDecimal: 2,
+ maxNumberWidth: 6,
+ sigFigs: null,
+
+ strokeWidth: 1.0,
+ strokeBorderWidth: 0,
+ strokeBorderColor: "white",
+
+ axisTickSize: 3,
+ axisLabelFontSize: 14,
+ rightGap: 5,
+
+ showRoller: false,
+ xValueParser: Dygraph.dateParser,
+
+ delimiter: ',',
+
+ sigma: 2.0,
+ errorBars: false,
+ fractions: false,
+ wilsonInterval: true, // only relevant if fractions is true
+ customBars: false,
+ fillGraph: false,
+ fillAlpha: 0.15,
+ connectSeparatedPoints: false,
+
+ stackedGraph: false,
+ stackedGraphNaNFill: 'all',
+ hideOverlayOnMouseOut: true,
+
+ legend: 'onmouseover',
+ stepPlot: false,
+ avoidMinZero: false,
+ xRangePad: 0,
+ yRangePad: null,
+ drawAxesAtZero: false,
+
+ // Sizes of the various chart labels.
+ titleHeight: 28,
+ xLabelHeight: 18,
+ yLabelWidth: 18,
+
+ axisLineColor: "black",
+ axisLineWidth: 0.3,
+ gridLineWidth: 0.3,
+ axisLabelColor: "black",
+ axisLabelWidth: 50,
+ gridLineColor: "rgb(128,128,128)",
+
+ interactionModel: null, // will be set to Dygraph.Interaction.defaultModel
+ animatedZooms: false, // (for now)
+
+ // Range selector options
+ showRangeSelector: false,
+ rangeSelectorHeight: 40,
+ rangeSelectorPlotStrokeColor: "#808FAB",
+ rangeSelectorPlotFillGradientColor: "white",
+ rangeSelectorPlotFillColor: "#A7B1C4",
+ rangeSelectorBackgroundStrokeColor: "gray",
+ rangeSelectorBackgroundLineWidth: 1,
+ rangeSelectorPlotLineWidth:1.5,
+ rangeSelectorForegroundStrokeColor: "black",
+ rangeSelectorForegroundLineWidth: 1,
+ rangeSelectorAlpha: 0.6,
+ showInRangeSelector: null,
+
+ // The ordering here ensures that central lines always appear above any
+ // fill bars/error bars.
+ plotter: [
+ Dygraph.Plotters.fillPlotter,
+ Dygraph.Plotters.errorPlotter,
+ Dygraph.Plotters.linePlotter
+ ],
+
+ plugins: [ ],
+
+ // per-axis options
+ axes: {
+ x: {
+ pixelsPerLabel: 70,
+ axisLabelWidth: 60,
+ axisLabelFormatter: Dygraph.dateAxisLabelFormatter,
+ valueFormatter: Dygraph.dateValueFormatter,
+ drawGrid: true,
+ drawAxis: true,
+ independentTicks: true,
+ ticker: null // will be set in dygraph-tickers.js
+ },
+ y: {
+ axisLabelWidth: 50,
+ pixelsPerLabel: 30,
+ valueFormatter: Dygraph.numberValueFormatter,
+ axisLabelFormatter: Dygraph.numberAxisLabelFormatter,
+ drawGrid: true,
+ drawAxis: true,
+ independentTicks: true,
+ ticker: null // will be set in dygraph-tickers.js
+ },
+ y2: {
+ axisLabelWidth: 50,
+ pixelsPerLabel: 30,
+ valueFormatter: Dygraph.numberValueFormatter,
+ axisLabelFormatter: Dygraph.numberAxisLabelFormatter,
+ drawAxis: true, // only applies when there are two axes of data.
+ drawGrid: false,
+ independentTicks: false,
+ ticker: null // will be set in dygraph-tickers.js
+ }
+ }
+};
+
+// Directions for panning and zooming. Use bit operations when combined
+// values are possible.
+Dygraph.HORIZONTAL = 1;
+Dygraph.VERTICAL = 2;
+
+// Installed plugins, in order of precedence (most-general to most-specific).
+// Plugins are installed after they are defined, in plugins/install.js.
+Dygraph.PLUGINS = [
+];
+
+// Used for initializing annotation CSS rules only once.
+Dygraph.addedAnnotationCSS = false;
+
+Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) {
+ // Labels is no longer a constructor parameter, since it's typically set
+ // directly from the data source. It also conains a name for the x-axis,
+ // which the previous constructor form did not.
+ if (labels !== null) {
+ var new_labels = ["Date"];
+ for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]);
+ Dygraph.update(attrs, { 'labels': new_labels });
+ }
+ this.__init__(div, file, attrs);
+};
+
+/**
+ * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit
+ * and context <canvas> inside of it. See the constructor for details.
+ * on the parameters.
+ * @param {Element} div the Element to render the graph into.
+ * @param {string | Function} file Source data
+ * @param {Object} attrs Miscellaneous other options
+ * @private
+ */
+Dygraph.prototype.__init__ = function(div, file, attrs) {
+ // Support two-argument constructor
+ if (attrs === null || attrs === undefined) { attrs = {}; }
+
+ attrs = Dygraph.copyUserAttrs_(attrs);
+
+ if (typeof(div) == 'string') {
+ div = document.getElementById(div);
+ }
+
+ if (!div) {
+ console.error("Constructing dygraph with a non-existent div!");
+ return;
+ }
+
+ // Copy the important bits into the object
+ // TODO(danvk): most of these should just stay in the attrs_ dictionary.
+ this.maindiv_ = div;
+ this.file_ = file;
+ this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD;
+ this.previousVerticalX_ = -1;
+ this.fractions_ = attrs.fractions || false;
+ this.dateWindow_ = attrs.dateWindow || null;
+
+ this.annotations_ = [];
+
+ // Zoomed indicators - These indicate when the graph has been zoomed and on what axis.
+ this.zoomed_x_ = false;
+ this.zoomed_y_ = false;
+
+ // Clear the div. This ensure that, if multiple dygraphs are passed the same
+ // div, then only one will be drawn.
+ div.innerHTML = "";
+
+ // For historical reasons, the 'width' and 'height' options trump all CSS
+ // rules _except_ for an explicit 'width' or 'height' on the div.
+ // As an added convenience, if the div has zero height (like <div></div> does
+ // without any styles), then we use a default height/width.
+ if (div.style.width === '' && attrs.width) {
+ div.style.width = attrs.width + "px";
+ }
+ if (div.style.height === '' && attrs.height) {
+ div.style.height = attrs.height + "px";
+ }
+ if (div.style.height === '' && div.clientHeight === 0) {
+ div.style.height = Dygraph.DEFAULT_HEIGHT + "px";
+ if (div.style.width === '') {
+ div.style.width = Dygraph.DEFAULT_WIDTH + "px";
+ }
+ }
+ // These will be zero if the dygraph's div is hidden. In that case,
+ // use the user-specified attributes if present. If not, use zero
+ // and assume the user will call resize to fix things later.
+ this.width_ = div.clientWidth || attrs.width || 0;
+ this.height_ = div.clientHeight || attrs.height || 0;
+
+ // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_.
+ if (attrs.stackedGraph) {
+ attrs.fillGraph = true;
+ // TODO(nikhilk): Add any other stackedGraph checks here.
+ }
+
+ // DEPRECATION WARNING: All option processing should be moved from
+ // attrs_ and user_attrs_ to options_, which holds all this information.
+ //
+ // Dygraphs has many options, some of which interact with one another.
+ // To keep track of everything, we maintain two sets of options:
+ //
+ // this.user_attrs_ only options explicitly set by the user.
+ // this.attrs_ defaults, options derived from user_attrs_, data.
+ //
+ // Options are then accessed this.attr_('attr'), which first looks at
+ // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent
+ // defaults without overriding behavior that the user specifically asks for.
+ this.user_attrs_ = {};
+ Dygraph.update(this.user_attrs_, attrs);
+
+ // This sequence ensures that Dygraph.DEFAULT_ATTRS is never modified.
+ this.attrs_ = {};
+ Dygraph.updateDeep(this.attrs_, Dygraph.DEFAULT_ATTRS);
+
+ this.boundaryIds_ = [];
+ this.setIndexByName_ = {};
+ this.datasetIndex_ = [];
+
+ this.registeredEvents_ = [];
+ this.eventListeners_ = {};
+
+ this.attributes_ = new DygraphOptions(this);
+
+ // Create the containing DIV and other interactive elements
+ this.createInterface_();
+
+ // Activate plugins.
+ this.plugins_ = [];
+ var plugins = Dygraph.PLUGINS.concat(this.getOption('plugins'));
+ for (var i = 0; i < plugins.length; i++) {
+ // the plugins option may contain either plugin classes or instances.
+ // Plugin instances contain an activate method.
+ var Plugin = plugins[i]; // either a constructor or an instance.
+ var pluginInstance;
+ if (typeof(Plugin.activate) !== 'undefined') {
+ pluginInstance = Plugin;
+ } else {
+ pluginInstance = new Plugin();
+ }
+
+ var pluginDict = {
+ plugin: pluginInstance,
+ events: {},
+ options: {},
+ pluginOptions: {}
+ };
+
+ var handlers = pluginInstance.activate(this);
+ for (var eventName in handlers) {
+ if (!handlers.hasOwnProperty(eventName)) continue;
+ // TODO(danvk): validate eventName.
+ pluginDict.events[eventName] = handlers[eventName];
+ }
+
+ this.plugins_.push(pluginDict);
+ }
+
+ // At this point, plugins can no longer register event handlers.
+ // Construct a map from event -> ordered list of [callback, plugin].
+ for (var i = 0; i < this.plugins_.length; i++) {
+ var plugin_dict = this.plugins_[i];
+ for (var eventName in plugin_dict.events) {
+ if (!plugin_dict.events.hasOwnProperty(eventName)) continue;
+ var callback = plugin_dict.events[eventName];
+
+ var pair = [plugin_dict.plugin, callback];
+ if (!(eventName in this.eventListeners_)) {
+ this.eventListeners_[eventName] = [pair];
+ } else {
+ this.eventListeners_[eventName].push(pair);
+ }
+ }
+ }
+
+ this.createDragInterface_();
+
+ this.start_();
+};
+
+/**
+ * Triggers a cascade of events to the various plugins which are interested in them.
+ * Returns true if the "default behavior" should be prevented, i.e. if one
+ * of the event listeners called event.preventDefault().
+ * @private
+ */
+Dygraph.prototype.cascadeEvents_ = function(name, extra_props) {
+ if (!(name in this.eventListeners_)) return false;
+
+ // QUESTION: can we use objects & prototypes to speed this up?
+ var e = {
+ dygraph: this,
+ cancelable: false,
+ defaultPrevented: false,
+ preventDefault: function() {
+ if (!e.cancelable) throw "Cannot call preventDefault on non-cancelable event.";
+ e.defaultPrevented = true;
+ },
+ propagationStopped: false,
+ stopPropagation: function() {
+ e.propagationStopped = true;
+ }
+ };
+ Dygraph.update(e, extra_props);
+
+ var callback_plugin_pairs = this.eventListeners_[name];
+ if (callback_plugin_pairs) {
+ for (var i = callback_plugin_pairs.length - 1; i >= 0; i--) {
+ var plugin = callback_plugin_pairs[i][0];
+ var callback = callback_plugin_pairs[i][1];
+ callback.call(plugin, e);
+ if (e.propagationStopped) break;
+ }
+ }
+ return e.defaultPrevented;
+};
+
+/**
+ * Fetch a plugin instance of a particular class. Only for testing.
+ * @private
+ * @param {!Class} type The type of the plugin.
+ * @return {Object} Instance of the plugin, or null if there is none.
+ */
+Dygraph.prototype.getPluginInstance_ = function(type) {
+ for (var i = 0; i < this.plugins_.length; i++) {
+ var p = this.plugins_[i];
+ if (p.plugin instanceof type) {
+ return p.plugin;
+ }
+ }
+ return null;
+};
+
+/**
+ * Returns the zoomed status of the chart for one or both axes.
+ *
+ * Axis is an optional parameter. Can be set to 'x' or 'y'.
+ *
+ * The zoomed status for an axis is set whenever a user zooms using the mouse
+ * or when the dateWindow or valueRange are updated (unless the
+ * isZoomedIgnoreProgrammaticZoom option is also specified).
+ */
+Dygraph.prototype.isZoomed = function(axis) {
+ if (axis === null || axis === undefined) {
+ return this.zoomed_x_ || this.zoomed_y_;
+ }
+ if (axis === 'x') return this.zoomed_x_;
+ if (axis === 'y') return this.zoomed_y_;
+ throw "axis parameter is [" + axis + "] must be null, 'x' or 'y'.";
+};
+
+/**
+ * Returns information about the Dygraph object, including its containing ID.
+ */
+Dygraph.prototype.toString = function() {
+ var maindiv = this.maindiv_;
+ var id = (maindiv && maindiv.id) ? maindiv.id : maindiv;
+ return "[Dygraph " + id + "]";
+};
+
+/**
+ * @private
+ * Returns the value of an option. This may be set by the user (either in the
+ * constructor or by calling updateOptions) or by dygraphs, and may be set to a
+ * per-series value.
+ * @param {string} name The name of the option, e.g. 'rollPeriod'.
+ * @param {string} [seriesName] The name of the series to which the option
+ * will be applied. If no per-series value of this option is available, then
+ * the global value is returned. This is optional.
+ * @return { ... } The value of the option.
+ */
+Dygraph.prototype.attr_ = function(name, seriesName) {
+ if (DEBUG) {
+ if (typeof(Dygraph.OPTIONS_REFERENCE) === 'undefined') {
+ console.error('Must include options reference JS for testing');
+ } else if (!Dygraph.OPTIONS_REFERENCE.hasOwnProperty(name)) {
+ console.error('Dygraphs is using property ' + name + ', which has no ' +
+ 'entry in the Dygraphs.OPTIONS_REFERENCE listing.');
+ // Only log this error once.
+ Dygraph.OPTIONS_REFERENCE[name] = true;
+ }
+ }
+ return seriesName ? this.attributes_.getForSeries(name, seriesName) : this.attributes_.get(name);
+};
+
+/**
+ * Returns the current value for an option, as set in the constructor or via
+ * updateOptions. You may pass in an (optional) series name to get per-series
+ * values for the option.
+ *
+ * All values returned by this method should be considered immutable. If you
+ * modify them, there is no guarantee that the changes will be honored or that
+ * dygraphs will remain in a consistent state. If you want to modify an option,
+ * use updateOptions() instead.
+ *
+ * @param {string} name The name of the option (e.g. 'strokeWidth')
+ * @param {string=} opt_seriesName Series name to get per-series values.
+ * @return {*} The value of the option.
+ */
+Dygraph.prototype.getOption = function(name, opt_seriesName) {
+ return this.attr_(name, opt_seriesName);
+};
+
+/**
+ * Like getOption(), but specifically returns a number.
+ * This is a convenience function for working with the Closure Compiler.
+ * @param {string} name The name of the option (e.g. 'strokeWidth')
+ * @param {string=} opt_seriesName Series name to get per-series values.
+ * @return {number} The value of the option.
+ * @private
+ */
+Dygraph.prototype.getNumericOption = function(name, opt_seriesName) {
+ return /** @type{number} */(this.getOption(name, opt_seriesName));
+};
+
+/**
+ * Like getOption(), but specifically returns a string.
+ * This is a convenience function for working with the Closure Compiler.
+ * @param {string} name The name of the option (e.g. 'strokeWidth')
+ * @param {string=} opt_seriesName Series name to get per-series values.
+ * @return {string} The value of the option.
+ * @private
+ */
+Dygraph.prototype.getStringOption = function(name, opt_seriesName) {
+ return /** @type{string} */(this.getOption(name, opt_seriesName));
+};
+
+/**
+ * Like getOption(), but specifically returns a boolean.
+ * This is a convenience function for working with the Closure Compiler.
+ * @param {string} name The name of the option (e.g. 'strokeWidth')
+ * @param {string=} opt_seriesName Series name to get per-series values.
+ * @return {boolean} The value of the option.
+ * @private
+ */
+Dygraph.prototype.getBooleanOption = function(name, opt_seriesName) {
+ return /** @type{boolean} */(this.getOption(name, opt_seriesName));
+};
+
+/**
+ * Like getOption(), but specifically returns a function.
+ * This is a convenience function for working with the Closure Compiler.
+ * @param {string} name The name of the option (e.g. 'strokeWidth')
+ * @param {string=} opt_seriesName Series name to get per-series values.
+ * @return {function(...)} The value of the option.
+ * @private
+ */
+Dygraph.prototype.getFunctionOption = function(name, opt_seriesName) {
+ return /** @type{function(...)} */(this.getOption(name, opt_seriesName));
+};
+
+Dygraph.prototype.getOptionForAxis = function(name, axis) {
+ return this.attributes_.getForAxis(name, axis);
+};
+
+/**
+ * @private
+ * @param {string} axis The name of the axis (i.e. 'x', 'y' or 'y2')
+ * @return { ... } A function mapping string -> option value
+ */
+Dygraph.prototype.optionsViewForAxis_ = function(axis) {
+ var self = this;
+ return function(opt) {
+ var axis_opts = self.user_attrs_.axes;
+ if (axis_opts && axis_opts[axis] && axis_opts[axis].hasOwnProperty(opt)) {
+ return axis_opts[axis][opt];
+ }
+
+ // I don't like that this is in a second spot.
+ if (axis === 'x' && opt === 'logscale') {
+ // return the default value.
+ // TODO(konigsberg): pull the default from a global default.
+ return false;
+ }
+
+ // user-specified attributes always trump defaults, even if they're less
+ // specific.
+ if (typeof(self.user_attrs_[opt]) != 'undefined') {
+ return self.user_attrs_[opt];
+ }
+
+ axis_opts = self.attrs_.axes;
+ if (axis_opts && axis_opts[axis] && axis_opts[axis].hasOwnProperty(opt)) {
+ return axis_opts[axis][opt];
+ }
+ // check old-style axis options
+ // TODO(danvk): add a deprecation warning if either of these match.
+ if (axis == 'y' && self.axes_[0].hasOwnProperty(opt)) {
+ return self.axes_[0][opt];
+ } else if (axis == 'y2' && self.axes_[1].hasOwnProperty(opt)) {
+ return self.axes_[1][opt];
+ }
+ return self.attr_(opt);
+ };
+};
+
+/**
+ * Returns the current rolling period, as set by the user or an option.
+ * @return {number} The number of points in the rolling window
+ */
+Dygraph.prototype.rollPeriod = function() {
+ return this.rollPeriod_;
+};
+
+/**
+ * Returns the currently-visible x-range. This can be affected by zooming,
+ * panning or a call to updateOptions.
+ * Returns a two-element array: [left, right].
+ * If the Dygraph has dates on the x-axis, these will be millis since epoch.
+ */
+Dygraph.prototype.xAxisRange = function() {
+ return this.dateWindow_ ? this.dateWindow_ : this.xAxisExtremes();
+};
+
+/**
+ * Returns the lower- and upper-bound x-axis values of the
+ * data set.
+ */
+Dygraph.prototype.xAxisExtremes = function() {
+ var pad = this.getNumericOption('xRangePad') / this.plotter_.area.w;
+ if (this.numRows() === 0) {
+ return [0 - pad, 1 + pad];
+ }
+ var left = this.rawData_[0][0];
+ var right = this.rawData_[this.rawData_.length - 1][0];
+ if (pad) {
+ // Must keep this in sync with dygraph-layout _evaluateLimits()
+ var range = right - left;
+ left -= range * pad;
+ right += range * pad;
+ }
+ return [left, right];
+};
+
+/**
+ * Returns the currently-visible y-range for an axis. This can be affected by
+ * zooming, panning or a call to updateOptions. Axis indices are zero-based. If
+ * called with no arguments, returns the range of the first axis.
+ * Returns a two-element array: [bottom, top].
+ */
+Dygraph.prototype.yAxisRange = function(idx) {
+ if (typeof(idx) == "undefined") idx = 0;
+ if (idx < 0 || idx >= this.axes_.length) {
+ return null;
+ }
+ var axis = this.axes_[idx];
+ return [ axis.computedValueRange[0], axis.computedValueRange[1] ];
+};
+
+/**
+ * Returns the currently-visible y-ranges for each axis. This can be affected by
+ * zooming, panning, calls to updateOptions, etc.
+ * Returns an array of [bottom, top] pairs, one for each y-axis.
+ */
+Dygraph.prototype.yAxisRanges = function() {
+ var ret = [];
+ for (var i = 0; i < this.axes_.length; i++) {
+ ret.push(this.yAxisRange(i));
+ }
+ return ret;
+};
+
+// TODO(danvk): use these functions throughout dygraphs.
+/**
+ * Convert from data coordinates to canvas/div X/Y coordinates.
+ * If specified, do this conversion for the coordinate system of a particular
+ * axis. Uses the first axis by default.
+ * Returns a two-element array: [X, Y]
+ *
+ * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord
+ * instead of toDomCoords(null, y, axis).
+ */
+Dygraph.prototype.toDomCoords = function(x, y, axis) {
+ return [ this.toDomXCoord(x), this.toDomYCoord(y, axis) ];
+};
+
+/**
+ * Convert from data x coordinates to canvas/div X coordinate.
+ * If specified, do this conversion for the coordinate system of a particular
+ * axis.
+ * Returns a single value or null if x is null.
+ */
+Dygraph.prototype.toDomXCoord = function(x) {
+ if (x === null) {
+ return null;
+ }
+
+ var area = this.plotter_.area;
+ var xRange = this.xAxisRange();
+ return area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w;
+};
+
+/**
+ * Convert from data x coordinates to canvas/div Y coordinate and optional
+ * axis. Uses the first axis by default.
+ *
+ * returns a single value or null if y is null.
+ */
+Dygraph.prototype.toDomYCoord = function(y, axis) {
+ var pct = this.toPercentYCoord(y, axis);
+
+ if (pct === null) {
+ return null;
+ }
+ var area = this.plotter_.area;
+ return area.y + pct * area.h;
+};
+
+/**
+ * Convert from canvas/div coords to data coordinates.
+ * If specified, do this conversion for the coordinate system of a particular
+ * axis. Uses the first axis by default.
+ * Returns a two-element array: [X, Y].
+ *
+ * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord
+ * instead of toDataCoords(null, y, axis).
+ */
+Dygraph.prototype.toDataCoords = function(x, y, axis) {
+ return [ this.toDataXCoord(x), this.toDataYCoord(y, axis) ];
+};
+
+/**
+ * Convert from canvas/div x coordinate to data coordinate.
+ *
+ * If x is null, this returns null.
+ */
+Dygraph.prototype.toDataXCoord = function(x) {
+ if (x === null) {
+ return null;
+ }
+
+ var area = this.plotter_.area;
+ var xRange = this.xAxisRange();
+
+ if (!this.attributes_.getForAxis("logscale", 'x')) {
+ return xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]);
+ } else {
+ // TODO: remove duplicate code?
+ // Computing the inverse of toDomCoord.
+ var pct = (x - area.x) / area.w;
+
+ // Computing the inverse of toPercentXCoord. The function was arrived at with
+ // the following steps:
+ //
+ // Original calcuation:
+ // pct = (log(x) - log(xRange[0])) / (log(xRange[1]) - log(xRange[0])));
+ //
+ // Multiply both sides by the right-side demoninator.
+ // pct * (log(xRange[1] - log(xRange[0]))) = log(x) - log(xRange[0])
+ //
+ // add log(xRange[0]) to both sides
+ // log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0])) = log(x);
+ //
+ // Swap both sides of the equation,
+ // log(x) = log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0]))
+ //
+ // Use both sides as the exponent in 10^exp and we're done.
+ // x = 10 ^ (log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0])))
+ var logr0 = Dygraph.log10(xRange[0]);
+ var logr1 = Dygraph.log10(xRange[1]);
+ var exponent = logr0 + (pct * (logr1 - logr0));
+ var value = Math.pow(Dygraph.LOG_SCALE, exponent);
+ return value;
+ }
+};
+
+/**
+ * Convert from canvas/div y coord to value.
+ *
+ * If y is null, this returns null.
+ * if axis is null, this uses the first axis.
+ */
+Dygraph.prototype.toDataYCoord = function(y, axis) {
+ if (y === null) {
+ return null;
+ }
+
+ var area = this.plotter_.area;
+ var yRange = this.yAxisRange(axis);
+
+ if (typeof(axis) == "undefined") axis = 0;
+ if (!this.attributes_.getForAxis("logscale", axis)) {
+ return yRange[0] + (area.y + area.h - y) / area.h * (yRange[1] - yRange[0]);
+ } else {
+ // Computing the inverse of toDomCoord.
+ var pct = (y - area.y) / area.h;
+
+ // Computing the inverse of toPercentYCoord. The function was arrived at with
+ // the following steps:
+ //
+ // Original calcuation:
+ // pct = (log(yRange[1]) - log(y)) / (log(yRange[1]) - log(yRange[0]));
+ //
+ // Multiply both sides by the right-side demoninator.
+ // pct * (log(yRange[1]) - log(yRange[0])) = log(yRange[1]) - log(y);
+ //
+ // subtract log(yRange[1]) from both sides.
+ // (pct * (log(yRange[1]) - log(yRange[0]))) - log(yRange[1]) = -log(y);
+ //
+ // and multiply both sides by -1.
+ // log(yRange[1]) - (pct * (logr1 - log(yRange[0])) = log(y);
+ //
+ // Swap both sides of the equation,
+ // log(y) = log(yRange[1]) - (pct * (log(yRange[1]) - log(yRange[0])));
+ //
+ // Use both sides as the exponent in 10^exp and we're done.
+ // y = 10 ^ (log(yRange[1]) - (pct * (log(yRange[1]) - log(yRange[0]))));
+ var logr0 = Dygraph.log10(yRange[0]);
+ var logr1 = Dygraph.log10(yRange[1]);
+ var exponent = logr1 - (pct * (logr1 - logr0));
+ var value = Math.pow(Dygraph.LOG_SCALE, exponent);
+ return value;
+ }
+};
+
+/**
+ * Converts a y for an axis to a percentage from the top to the
+ * bottom of the drawing area.
+ *
+ * If the coordinate represents a value visible on the canvas, then
+ * the value will be between 0 and 1, where 0 is the top of the canvas.
+ * However, this method will return values outside the range, as
+ * values can fall outside the canvas.
+ *
+ * If y is null, this returns null.
+ * if axis is null, this uses the first axis.
+ *
+ * @param {number} y The data y-coordinate.
+ * @param {number} [axis] The axis number on which the data coordinate lives.
+ * @return {number} A fraction in [0, 1] where 0 = the top edge.
+ */
+Dygraph.prototype.toPercentYCoord = function(y, axis) {
+ if (y === null) {
+ return null;
+ }
+ if (typeof(axis) == "undefined") axis = 0;
+
+ var yRange = this.yAxisRange(axis);
+
+ var pct;
+ var logscale = this.attributes_.getForAxis("logscale", axis);
+ if (logscale) {
+ var logr0 = Dygraph.log10(yRange[0]);
+ var logr1 = Dygraph.log10(yRange[1]);
+ pct = (logr1 - Dygraph.log10(y)) / (logr1 - logr0);
+ } else {
+ // yRange[1] - y is unit distance from the bottom.
+ // yRange[1] - yRange[0] is the scale of the range.
+ // (yRange[1] - y) / (yRange[1] - yRange[0]) is the % from the bottom.
+ pct = (yRange[1] - y) / (yRange[1] - yRange[0]);
+ }
+ return pct;
+};
+
+/**
+ * Converts an x value to a percentage from the left to the right of
+ * the drawing area.
+ *
+ * If the coordinate represents a value visible on the canvas, then
+ * the value will be between 0 and 1, where 0 is the left of the canvas.
+ * However, this method will return values outside the range, as
+ * values can fall outside the canvas.
+ *
+ * If x is null, this returns null.
+ * @param {number} x The data x-coordinate.
+ * @return {number} A fraction in [0, 1] where 0 = the left edge.
+ */
+Dygraph.prototype.toPercentXCoord = function(x) {
+ if (x === null) {
+ return null;
+ }
+
+ var xRange = this.xAxisRange();
+ var pct;
+ var logscale = this.attributes_.getForAxis("logscale", 'x') ;
+ if (logscale === true) { // logscale can be null so we test for true explicitly.
+ var logr0 = Dygraph.log10(xRange[0]);
+ var logr1 = Dygraph.log10(xRange[1]);
+ pct = (Dygraph.log10(x) - logr0) / (logr1 - logr0);
+ } else {
+ // x - xRange[0] is unit distance from the left.
+ // xRange[1] - xRange[0] is the scale of the range.
+ // The full expression below is the % from the left.
+ pct = (x - xRange[0]) / (xRange[1] - xRange[0]);
+ }
+ return pct;
+};
+
+/**
+ * Returns the number of columns (including the independent variable).
+ * @return {number} The number of columns.
+ */
+Dygraph.prototype.numColumns = function() {
+ if (!this.rawData_) return 0;
+ return this.rawData_[0] ? this.rawData_[0].length : this.attr_("labels").length;
+};
+
+/**
+ * Returns the number of rows (excluding any header/label row).
+ * @return {number} The number of rows, less any header.
+ */
+Dygraph.prototype.numRows = function() {
+ if (!this.rawData_) return 0;
+ return this.rawData_.length;
+};
+
+/**
+ * Returns the value in the given row and column. If the row and column exceed
+ * the bounds on the data, returns null. Also returns null if the value is
+ * missing.
+ * @param {number} row The row number of the data (0-based). Row 0 is the
+ * first row of data, not a header row.
+ * @param {number} col The column number of the data (0-based)
+ * @return {number} The value in the specified cell or null if the row/col
+ * were out of range.
+ */
+Dygraph.prototype.getValue = function(row, col) {
+ if (row < 0 || row > this.rawData_.length) return null;
+ if (col < 0 || col > this.rawData_[row].length) return null;
+
+ return this.rawData_[row][col];
+};
+
+/**
+ * Generates interface elements for the Dygraph: a containing div, a div to
+ * display the current point, and a textbox to adjust the rolling average
+ * period. Also creates the Renderer/Layout elements.
+ * @private
+ */
+Dygraph.prototype.createInterface_ = function() {
+ // Create the all-enclosing graph div
+ var enclosing = this.maindiv_;
+
+ this.graphDiv = document.createElement("div");
+
+ // TODO(danvk): any other styles that are useful to set here?
+ this.graphDiv.style.textAlign = 'left'; // This is a CSS "reset"
+ this.graphDiv.style.position = 'relative';
+ enclosing.appendChild(this.graphDiv);
+
+ // Create the canvas for interactive parts of the chart.
+ this.canvas_ = Dygraph.createCanvas();
+ this.canvas_.style.position = "absolute";
+
+ // ... and for static parts of the chart.
+ this.hidden_ = this.createPlotKitCanvas_(this.canvas_);
+
+ this.canvas_ctx_ = Dygraph.getContext(this.canvas_);
+ this.hidden_ctx_ = Dygraph.getContext(this.hidden_);
+
+ this.resizeElements_();
+
+ // The interactive parts of the graph are drawn on top of the chart.
+ this.graphDiv.appendChild(this.hidden_);
+ this.graphDiv.appendChild(this.canvas_);
+ this.mouseEventElement_ = this.createMouseEventElement_();
+
+ // Create the grapher
+ this.layout_ = new DygraphLayout(this);
+
+ var dygraph = this;
+
+ this.mouseMoveHandler_ = function(e) {
+ dygraph.mouseMove_(e);
+ };
+
+ this.mouseOutHandler_ = function(e) {
+ // The mouse has left the chart if:
+ // 1. e.target is inside the chart
+ // 2. e.relatedTarget is outside the chart
+ var target = e.target || e.fromElement;
+ var relatedTarget = e.relatedTarget || e.toElement;
+ if (Dygraph.isNodeContainedBy(target, dygraph.graphDiv) &&
+ !Dygraph.isNodeContainedBy(relatedTarget, dygraph.graphDiv)) {
+ dygraph.mouseOut_(e);
+ }
+ };
+
+ this.addAndTrackEvent(window, 'mouseout', this.mouseOutHandler_);
+ this.addAndTrackEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler_);
+
+ // Don't recreate and register the resize handler on subsequent calls.
+ // This happens when the graph is resized.
+ if (!this.resizeHandler_) {
+ this.resizeHandler_ = function(e) {
+ dygraph.resize();
+ };
+
+ // Update when the window is resized.
+ // TODO(danvk): drop frames depending on complexity of the chart.
+ this.addAndTrackEvent(window, 'resize', this.resizeHandler_);
+ }
+};
+
+Dygraph.prototype.resizeElements_ = function() {
+ this.graphDiv.style.width = this.width_ + "px";
+ this.graphDiv.style.height = this.height_ + "px";
+
+ var canvasScale = Dygraph.getContextPixelRatio(this.canvas_ctx_);
+ this.canvas_.width = this.width_ * canvasScale;
+ this.canvas_.height = this.height_ * canvasScale;
+ this.canvas_.style.width = this.width_ + "px"; // for IE
+ this.canvas_.style.height = this.height_ + "px"; // for IE
+ if (canvasScale !== 1) {
+ this.canvas_ctx_.scale(canvasScale, canvasScale);
+ }
+
+ var hiddenScale = Dygraph.getContextPixelRatio(this.hidden_ctx_);
+ this.hidden_.width = this.width_ * hiddenScale;
+ this.hidden_.height = this.height_ * hiddenScale;
+ this.hidden_.style.width = this.width_ + "px"; // for IE
+ this.hidden_.style.height = this.height_ + "px"; // for IE
+ if (hiddenScale !== 1) {
+ this.hidden_ctx_.scale(hiddenScale, hiddenScale);
+ }
+};
+
+/**
+ * Detach DOM elements in the dygraph and null out all data references.
+ * Calling this when you're done with a dygraph can dramatically reduce memory
+ * usage. See, e.g., the tests/perf.html example.
+ */
+Dygraph.prototype.destroy = function() {
+ this.canvas_ctx_.restore();
+ this.hidden_ctx_.restore();
+
+ // Destroy any plugins, in the reverse order that they were registered.
+ for (var i = this.plugins_.length - 1; i >= 0; i--) {
+ var p = this.plugins_.pop();
+ if (p.plugin.destroy) p.plugin.destroy();
+ }
+
+ var removeRecursive = function(node) {
+ while (node.hasChildNodes()) {
+ removeRecursive(node.firstChild);
+ node.removeChild(node.firstChild);
+ }
+ };
+
+ this.removeTrackedEvents_();
+
+ // remove mouse event handlers (This may not be necessary anymore)
+ Dygraph.removeEvent(window, 'mouseout', this.mouseOutHandler_);
+ Dygraph.removeEvent(this.mouseEventElement_, 'mousemove', this.mouseMoveHandler_);
+
+ // remove window handlers
+ Dygraph.removeEvent(window,'resize', this.resizeHandler_);
+ this.resizeHandler_ = null;
+
+ removeRecursive(this.maindiv_);
+
+ var nullOut = function(obj) {
+ for (var n in obj) {
+ if (typeof(obj[n]) === 'object') {
+ obj[n] = null;
+ }
+ }
+ };
+ // These may not all be necessary, but it can't hurt...
+ nullOut(this.layout_);
+ nullOut(this.plotter_);
+ nullOut(this);
+};
+
+/**
+ * Creates the canvas on which the chart will be drawn. Only the Renderer ever
+ * draws on this particular canvas. All Dygraph work (i.e. drawing hover dots
+ * or the zoom rectangles) is done on this.canvas_.
+ * @param {Object} canvas The Dygraph canvas over which to overlay the plot
+ * @return {Object} The newly-created canvas
+ * @private
+ */
+Dygraph.prototype.createPlotKitCanvas_ = function(canvas) {
+ var h = Dygraph.createCanvas();
+ h.style.position = "absolute";
+ // TODO(danvk): h should be offset from canvas. canvas needs to include
+ // some extra area to make it easier to zoom in on the far left and far
+ // right. h needs to be precisely the plot area, so that clipping occurs.
+ h.style.top = canvas.style.top;
+ h.style.left = canvas.style.left;
+ h.width = this.width_;
+ h.height = this.height_;
+ h.style.width = this.width_ + "px"; // for IE
+ h.style.height = this.height_ + "px"; // for IE
+ return h;
+};
+
+/**
+ * Creates an overlay element used to handle mouse events.
+ * @return {Object} The mouse event element.
+ * @private
+ */
+Dygraph.prototype.createMouseEventElement_ = function() {
+ return this.canvas_;
+};
+
+/**
+ * Generate a set of distinct colors for the data series. This is done with a
+ * color wheel. Saturation/Value are customizable, and the hue is
+ * equally-spaced around the color wheel. If a custom set of colors is
+ * specified, that is used instead.
+ * @private
+ */
+Dygraph.prototype.setColors_ = function() {
+ var labels = this.getLabels();
+ var num = labels.length - 1;
+ this.colors_ = [];
+ this.colorsMap_ = {};
+
+ // These are used for when no custom colors are specified.
+ var sat = this.getNumericOption('colorSaturation') || 1.0;
+ var val = this.getNumericOption('colorValue') || 0.5;
+ var half = Math.ceil(num / 2);
+
+ var colors = this.getOption('colors');
+ var visibility = this.visibility();
+ for (var i = 0; i < num; i++) {
+ if (!visibility[i]) {
+ continue;
+ }
+ var label = labels[i + 1];
+ var colorStr = this.attributes_.getForSeries('color', label);
+ if (!colorStr) {
+ if (colors) {
+ colorStr = colors[i % colors.length];
+ } else {
+ // alternate colors for high contrast.
+ var idx = i % 2 ? (half + (i + 1)/ 2) : Math.ceil((i + 1) / 2);
+ var hue = (1.0 * idx / (1 + num));
+ colorStr = Dygraph.hsvToRGB(hue, sat, val);
+ }
+ }
+ this.colors_.push(colorStr);
+ this.colorsMap_[label] = colorStr;
+ }
+};
+
+/**
+ * Return the list of colors. This is either the list of colors passed in the
+ * attributes or the autogenerated list of rgb(r,g,b) strings.
+ * This does not return colors for invisible series.
+ * @return {Array.<string>} The list of colors.
+ */
+Dygraph.prototype.getColors = function() {
+ return this.colors_;
+};
+
+/**
+ * Returns a few attributes of a series, i.e. its color, its visibility, which
+ * axis it's assigned to, and its column in the original data.
+ * Returns null if the series does not exist.
+ * Otherwise, returns an object with column, visibility, color and axis properties.
+ * The "axis" property will be set to 1 for y1 and 2 for y2.
+ * The "column" property can be fed back into getValue(row, column) to get
+ * values for this series.
+ */
+Dygraph.prototype.getPropertiesForSeries = function(series_name) {
+ var idx = -1;
+ var labels = this.getLabels();
+ for (var i = 1; i < labels.length; i++) {
+ if (labels[i] == series_name) {
+ idx = i;
+ break;
+ }
+ }
+ if (idx == -1) return null;
+
+ return {
+ name: series_name,
+ column: idx,
+ visible: this.visibility()[idx - 1],
+ color: this.colorsMap_[series_name],
+ axis: 1 + this.attributes_.axisForSeries(series_name)
+ };
+};
+
+/**
+ * Create the text box to adjust the averaging period
+ * @private
+ */
+Dygraph.prototype.createRollInterface_ = function() {
+ // Create a roller if one doesn't exist already.
+ if (!this.roller_) {
+ this.roller_ = document.createElement("input");
+ this.roller_.type = "text";
+ this.roller_.style.display = "none";
+ this.graphDiv.appendChild(this.roller_);
+ }
+
+ var display = this.getBooleanOption('showRoller') ? 'block' : 'none';
+
+ var area = this.plotter_.area;
+ var textAttr = { "position": "absolute",
+ "zIndex": 10,
+ "top": (area.y + area.h - 25) + "px",
+ "left": (area.x + 1) + "px",
+ "display": display
+ };
+ this.roller_.size = "2";
+ this.roller_.value = this.rollPeriod_;
+ for (var name in textAttr) {
+ if (textAttr.hasOwnProperty(name)) {
+ this.roller_.style[name] = textAttr[name];
+ }
+ }
+
+ var dygraph = this;
+ this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); };
+};
+
+/**
+ * Set up all the mouse handlers needed to capture dragging behavior for zoom
+ * events.
+ * @private
+ */
+Dygraph.prototype.createDragInterface_ = function() {
+ var context = {
+ // Tracks whether the mouse is down right now
+ isZooming: false,
+ isPanning: false, // is this drag part of a pan?
+ is2DPan: false, // if so, is that pan 1- or 2-dimensional?
+ dragStartX: null, // pixel coordinates
+ dragStartY: null, // pixel coordinates
+ dragEndX: null, // pixel coordinates
+ dragEndY: null, // pixel coordinates
+ dragDirection: null,
+ prevEndX: null, // pixel coordinates
+ prevEndY: null, // pixel coordinates
+ prevDragDirection: null,
+ cancelNextDblclick: false, // see comment in dygraph-interaction-model.js
+
+ // The value on the left side of the graph when a pan operation starts.
+ initialLeftmostDate: null,
+
+ // The number of units each pixel spans. (This won't be valid for log
+ // scales)
+ xUnitsPerPixel: null,
+
+ // TODO(danvk): update this comment
+ // The range in second/value units that the viewport encompasses during a
+ // panning operation.
+ dateRange: null,
+
+ // Top-left corner of the canvas, in DOM coords
+ // TODO(konigsberg): Rename topLeftCanvasX, topLeftCanvasY.
+ px: 0,
+ py: 0,
+
+ // Values for use with panEdgeFraction, which limit how far outside the
+ // graph's data boundaries it can be panned.
+ boundedDates: null, // [minDate, maxDate]
+ boundedValues: null, // [[minValue, maxValue] ...]
+
+ // We cover iframes during mouse interactions. See comments in
+ // dygraph-utils.js for more info on why this is a good idea.
+ tarp: new Dygraph.IFrameTarp(),
+
+ // contextB is the same thing as this context object but renamed.
+ initializeMouseDown: function(event, g, contextB) {
+ // prevents mouse drags from selecting page text.
+ if (event.preventDefault) {
+ event.preventDefault(); // Firefox, Chrome, etc.
+ } else {
+ event.returnValue = false; // IE
+ event.cancelBubble = true;
+ }
+
+ var canvasPos = Dygraph.findPos(g.canvas_);
+ contextB.px = canvasPos.x;
+ contextB.py = canvasPos.y;
+ contextB.dragStartX = Dygraph.dragGetX_(event, contextB);
+ contextB.dragStartY = Dygraph.dragGetY_(event, contextB);
+ contextB.cancelNextDblclick = false;
+ contextB.tarp.cover();
+ },
+ destroy: function() {
+ var context = this;
+ if (context.isZooming || context.isPanning) {
+ context.isZooming = false;
+ context.dragStartX = null;
+ context.dragStartY = null;
+ }
+
+ if (context.isPanning) {
+ context.isPanning = false;
+ context.draggingDate = null;
+ context.dateRange = null;
+ for (var i = 0; i < self.axes_.length; i++) {
+ delete self.axes_[i].draggingValue;
+ delete self.axes_[i].dragValueRange;
+ }
+ }
+
+ context.tarp.uncover();
+ }
+ };
+
+ var interactionModel = this.getOption("interactionModel");
+
+ // Self is the graph.
+ var self = this;
+
+ // Function that binds the graph and context to the handler.
+ var bindHandler = function(handler) {
+ return function(event) {
+ handler(event, self, context);
+ };
+ };
+
+ for (var eventName in interactionModel) {
+ if (!interactionModel.hasOwnProperty(eventName)) continue;
+ this.addAndTrackEvent(this.mouseEventElement_, eventName,
+ bindHandler(interactionModel[eventName]));
+ }
+
+ // If the user releases the mouse button during a drag, but not over the
+ // canvas, then it doesn't count as a zooming action.
+ if (!interactionModel.willDestroyContextMyself) {
+ var mouseUpHandler = function(event) {
+ context.destroy();
+ };
+
+ this.addAndTrackEvent(document, 'mouseup', mouseUpHandler);
+ }
+};
+
+/**
+ * Draw a gray zoom rectangle over the desired area of the canvas. Also clears
+ * up any previous zoom rectangles that were drawn. This could be optimized to
+ * avoid extra redrawing, but it's tricky to avoid interactions with the status
+ * dots.
+ *
+ * @param {number} direction the direction of the zoom rectangle. Acceptable
+ * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL.
+ * @param {number} startX The X position where the drag started, in canvas
+ * coordinates.
+ * @param {number} endX The current X position of the drag, in canvas coords.
+ * @param {number} startY The Y position where the drag started, in canvas
+ * coordinates.
+ * @param {number} endY The current Y position of the drag, in canvas coords.
+ * @param {number} prevDirection the value of direction on the previous call to
+ * this function. Used to avoid excess redrawing
+ * @param {number} prevEndX The value of endX on the previous call to this
+ * function. Used to avoid excess redrawing
+ * @param {number} prevEndY The value of endY on the previous call to this
+ * function. Used to avoid excess redrawing
+ * @private
+ */
+Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY,
+ endY, prevDirection, prevEndX,
+ prevEndY) {
+ var ctx = this.canvas_ctx_;
+
+ // Clean up from the previous rect if necessary
+ if (prevDirection == Dygraph.HORIZONTAL) {
+ ctx.clearRect(Math.min(startX, prevEndX), this.layout_.getPlotArea().y,
+ Math.abs(startX - prevEndX), this.layout_.getPlotArea().h);
+ } else if (prevDirection == Dygraph.VERTICAL) {
+ ctx.clearRect(this.layout_.getPlotArea().x, Math.min(startY, prevEndY),
+ this.layout_.getPlotArea().w, Math.abs(startY - prevEndY));
+ }
+
+ // Draw a light-grey rectangle to show the new viewing area
+ if (direction == Dygraph.HORIZONTAL) {
+ if (endX && startX) {
+ ctx.fillStyle = "rgba(128,128,128,0.33)";
+ ctx.fillRect(Math.min(startX, endX), this.layout_.getPlotArea().y,
+ Math.abs(endX - startX), this.layout_.getPlotArea().h);
+ }
+ } else if (direction == Dygraph.VERTICAL) {
+ if (endY && startY) {
+ ctx.fillStyle = "rgba(128,128,128,0.33)";
+ ctx.fillRect(this.layout_.getPlotArea().x, Math.min(startY, endY),
+ this.layout_.getPlotArea().w, Math.abs(endY - startY));
+ }
+ }
+};
+
+/**
+ * Clear the zoom rectangle (and perform no zoom).
+ * @private
+ */
+Dygraph.prototype.clearZoomRect_ = function() {
+ this.currentZoomRectArgs_ = null;
+ this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_);
+};
+
+/**
+ * Zoom to something containing [lowX, highX]. These are pixel coordinates in
+ * the canvas. The exact zoom window may be slightly larger if there are no data
+ * points near lowX or highX. Don't confuse this function with doZoomXDates,
+ * which accepts dates that match the raw data. This function redraws the graph.
+ *
+ * @param {number} lowX The leftmost pixel value that should be visible.
+ * @param {number} highX The rightmost pixel value that should be visible.
+ * @private
+ */
+Dygraph.prototype.doZoomX_ = function(lowX, highX) {
+ this.currentZoomRectArgs_ = null;
+ // Find the earliest and latest dates contained in this canvasx range.
+ // Convert the call to date ranges of the raw data.
+ var minDate = this.toDataXCoord(lowX);
+ var maxDate = this.toDataXCoord(highX);
+ this.doZoomXDates_(minDate, maxDate);
+};
+
+/**
+ * Zoom to something containing [minDate, maxDate] values. Don't confuse this
+ * method with doZoomX which accepts pixel coordinates. This function redraws
+ * the graph.
+ *
+ * @param {number} minDate The minimum date that should be visible.
+ * @param {number} maxDate The maximum date that should be visible.
+ * @private
+ */
+Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) {
+ // TODO(danvk): when xAxisRange is null (i.e. "fit to data", the animation
+ // can produce strange effects. Rather than the x-axis transitioning slowly
+ // between values, it can jerk around.)
+ var old_window = this.xAxisRange();
+ var new_window = [minDate, maxDate];
+ this.zoomed_x_ = true;
+ var that = this;
+ this.doAnimatedZoom(old_window, new_window, null, null, function() {
+ if (that.getFunctionOption("zoomCallback")) {
+ that.getFunctionOption("zoomCallback").call(that,
+ minDate, maxDate, that.yAxisRanges());
+ }
+ });
+};
+
+/**
+ * Zoom to something containing [lowY, highY]. These are pixel coordinates in
+ * the canvas. This function redraws the graph.
+ *
+ * @param {number} lowY The topmost pixel value that should be visible.
+ * @param {number} highY The lowest pixel value that should be visible.
+ * @private
+ */
+Dygraph.prototype.doZoomY_ = function(lowY, highY) {
+ this.currentZoomRectArgs_ = null;
+ // Find the highest and lowest values in pixel range for each axis.
+ // Note that lowY (in pixels) corresponds to the max Value (in data coords).
+ // This is because pixels increase as you go down on the screen, whereas data
+ // coordinates increase as you go up the screen.
+ var oldValueRanges = this.yAxisRanges();
+ var newValueRanges = [];
+ for (var i = 0; i < this.axes_.length; i++) {
+ var hi = this.toDataYCoord(lowY, i);
+ var low = this.toDataYCoord(highY, i);
+ newValueRanges.push([low, hi]);
+ }
+
+ this.zoomed_y_ = true;
+ var that = this;
+ this.doAnimatedZoom(null, null, oldValueRanges, newValueRanges, function() {
+ if (that.getFunctionOption("zoomCallback")) {
+ var xRange = that.xAxisRange();
+ that.getFunctionOption("zoomCallback").call(that,
+ xRange[0], xRange[1], that.yAxisRanges());
+ }
+ });
+};
+
+/**
+ * Transition function to use in animations. Returns values between 0.0
+ * (totally old values) and 1.0 (totally new values) for each frame.
+ * @private
+ */
+Dygraph.zoomAnimationFunction = function(frame, numFrames) {
+ var k = 1.5;
+ return (1.0 - Math.pow(k, -frame)) / (1.0 - Math.pow(k, -numFrames));
+};
+
+/**
+ * Reset the zoom to the original view coordinates. This is the same as
+ * double-clicking on the graph.
+ */
+Dygraph.prototype.resetZoom = function() {
+ var dirty = false, dirtyX = false, dirtyY = false;
+ if (this.dateWindow_ !== null) {
+ dirty = true;
+ dirtyX = true;
+ }
+
+ for (var i = 0; i < this.axes_.length; i++) {
+ if (typeof(this.axes_[i].valueWindow) !== 'undefined' && this.axes_[i].valueWindow !== null) {
+ dirty = true;
+ dirtyY = true;
+ }
+ }
+
+ // Clear any selection, since it's likely to be drawn in the wrong place.
+ this.clearSelection();
+
+ if (dirty) {
+ this.zoomed_x_ = false;
+ this.zoomed_y_ = false;
+
+ var minDate = this.rawData_[0][0];
+ var maxDate = this.rawData_[this.rawData_.length - 1][0];
+
+ // With only one frame, don't bother calculating extreme ranges.
+ // TODO(danvk): merge this block w/ the code below.
+ if (!this.getBooleanOption("animatedZooms")) {
+ this.dateWindow_ = null;
+ for (i = 0; i < this.axes_.length; i++) {
+ if (this.axes_[i].valueWindow !== null) {
+ delete this.axes_[i].valueWindow;
+ }
+ }
+ this.drawGraph_();
+ if (this.getFunctionOption("zoomCallback")) {
+ this.getFunctionOption("zoomCallback").call(this,
+ minDate, maxDate, this.yAxisRanges());
+ }
+ return;
+ }
+
+ var oldWindow=null, newWindow=null, oldValueRanges=null, newValueRanges=null;
+ if (dirtyX) {
+ oldWindow = this.xAxisRange();
+ newWindow = [minDate, maxDate];
+ }
+
+ if (dirtyY) {
+ oldValueRanges = this.yAxisRanges();
+ // TODO(danvk): this is pretty inefficient
+ var packed = this.gatherDatasets_(this.rolledSeries_, null);
+ var extremes = packed.extremes;
+
+ // this has the side-effect of modifying this.axes_.
+ // this doesn't make much sense in this context, but it's convenient (we
+ // need this.axes_[*].extremeValues) and not harmful since we'll be
+ // calling drawGraph_ shortly, which clobbers these values.
+ this.computeYAxisRanges_(extremes);
+
+ newValueRanges = [];
+ for (i = 0; i < this.axes_.length; i++) {
+ var axis = this.axes_[i];
+ newValueRanges.push((axis.valueRange !== null &&
+ axis.valueRange !== undefined) ?
+ axis.valueRange : axis.extremeRange);
+ }
+ }
+
+ var that = this;
+ this.doAnimatedZoom(oldWindow, newWindow, oldValueRanges, newValueRanges,
+ function() {
+ that.dateWindow_ = null;
+ for (var i = 0; i < that.axes_.length; i++) {
+ if (that.axes_[i].valueWindow !== null) {
+ delete that.axes_[i].valueWindow;
+ }
+ }
+ if (that.getFunctionOption("zoomCallback")) {
+ that.getFunctionOption("zoomCallback").call(that,
+ minDate, maxDate, that.yAxisRanges());
+ }
+ });
+ }
+};
+
+/**
+ * Combined animation logic for all zoom functions.
+ * either the x parameters or y parameters may be null.
+ * @private
+ */
+Dygraph.prototype.doAnimatedZoom = function(oldXRange, newXRange, oldYRanges, newYRanges, callback) {
+ var steps = this.getBooleanOption("animatedZooms") ?
+ Dygraph.ANIMATION_STEPS : 1;
+
+ var windows = [];
+ var valueRanges = [];
+ var step, frac;
+
+ if (oldXRange !== null && newXRange !== null) {
+ for (step = 1; step <= steps; step++) {
+ frac = Dygraph.zoomAnimationFunction(step, steps);
+ windows[step-1] = [oldXRange[0]*(1-frac) + frac*newXRange[0],
+ oldXRange[1]*(1-frac) + frac*newXRange[1]];
+ }
+ }
+
+ if (oldYRanges !== null && newYRanges !== null) {
+ for (step = 1; step <= steps; step++) {
+ frac = Dygraph.zoomAnimationFunction(step, steps);
+ var thisRange = [];
+ for (var j = 0; j < this.axes_.length; j++) {
+ thisRange.push([oldYRanges[j][0]*(1-frac) + frac*newYRanges[j][0],
+ oldYRanges[j][1]*(1-frac) + frac*newYRanges[j][1]]);
+ }
+ valueRanges[step-1] = thisRange;
+ }
+ }
+
+ var that = this;
+ Dygraph.repeatAndCleanup(function(step) {
+ if (valueRanges.length) {
+ for (var i = 0; i < that.axes_.length; i++) {
+ var w = valueRanges[step][i];
+ that.axes_[i].valueWindow = [w[0], w[1]];
+ }
+ }
+ if (windows.length) {
+ that.dateWindow_ = windows[step];
+ }
+ that.drawGraph_();
+ }, steps, Dygraph.ANIMATION_DURATION / steps, callback);
+};
+
+/**
+ * Get the current graph's area object.
+ *
+ * Returns: {x, y, w, h}
+ */
+Dygraph.prototype.getArea = function() {
+ return this.plotter_.area;
+};
+
+/**
+ * Convert a mouse event to DOM coordinates relative to the graph origin.
+ *
+ * Returns a two-element array: [X, Y].
+ */
+Dygraph.prototype.eventToDomCoords = function(event) {
+ if (event.offsetX && event.offsetY) {
+ return [ event.offsetX, event.offsetY ];
+ } else {
+ var eventElementPos = Dygraph.findPos(this.mouseEventElement_);
+ var canvasx = Dygraph.pageX(event) - eventElementPos.x;
+ var canvasy = Dygraph.pageY(event) - eventElementPos.y;
+ return [canvasx, canvasy];
+ }
+};
+
+/**
+ * Given a canvas X coordinate, find the closest row.
+ * @param {number} domX graph-relative DOM X coordinate
+ * Returns {number} row number.
+ * @private
+ */
+Dygraph.prototype.findClosestRow = function(domX) {
+ var minDistX = Infinity;
+ var closestRow = -1;
+ var sets = this.layout_.points;
+ for (var i = 0; i < sets.length; i++) {
+ var points = sets[i];
+ var len = points.length;
+ for (var j = 0; j < len; j++) {
+ var point = points[j];
+ if (!Dygraph.isValidPoint(point, true)) continue;
+ var dist = Math.abs(point.canvasx - domX);
+ if (dist < minDistX) {
+ minDistX = dist;
+ closestRow = point.idx;
+ }
+ }
+ }
+
+ return closestRow;
+};
+
+/**
+ * Given canvas X,Y coordinates, find the closest point.
+ *
+ * This finds the individual data point across all visible series
+ * that's closest to the supplied DOM coordinates using the standard
+ * Euclidean X,Y distance.
+ *
+ * @param {number} domX graph-relative DOM X coordinate
+ * @param {number} domY graph-relative DOM Y coordinate
+ * Returns: {row, seriesName, point}
+ * @private
+ */
+Dygraph.prototype.findClosestPoint = function(domX, domY) {
+ var minDist = Infinity;
+ var dist, dx, dy, point, closestPoint, closestSeries, closestRow;
+ for ( var setIdx = this.layout_.points.length - 1 ; setIdx >= 0 ; --setIdx ) {
+ var points = this.layout_.points[setIdx];
+ for (var i = 0; i < points.length; ++i) {
+ point = points[i];
+ if (!Dygraph.isValidPoint(point)) continue;
+ dx = point.canvasx - domX;
+ dy = point.canvasy - domY;
+ dist = dx * dx + dy * dy;
+ if (dist < minDist) {
+ minDist = dist;
+ closestPoint = point;
+ closestSeries = setIdx;
+ closestRow = point.idx;
+ }
+ }
+ }
+ var name = this.layout_.setNames[closestSeries];
+ return {
+ row: closestRow,
+ seriesName: name,
+ point: closestPoint
+ };
+};
+
+/**
+ * Given canvas X,Y coordinates, find the touched area in a stacked graph.
+ *
+ * This first finds the X data point closest to the supplied DOM X coordinate,
+ * then finds the series which puts the Y coordinate on top of its filled area,
+ * using linear interpolation between adjacent point pairs.
+ *
+ * @param {number} domX graph-relative DOM X coordinate
+ * @param {number} domY graph-relative DOM Y coordinate
+ * Returns: {row, seriesName, point}
+ * @private
+ */
+Dygraph.prototype.findStackedPoint = function(domX, domY) {
+ var row = this.findClosestRow(domX);
+ var closestPoint, closestSeries;
+ for (var setIdx = 0; setIdx < this.layout_.points.length; ++setIdx) {
+ var boundary = this.getLeftBoundary_(setIdx);
+ var rowIdx = row - boundary;
+ var points = this.layout_.points[setIdx];
+ if (rowIdx >= points.length) continue;
+ var p1 = points[rowIdx];
+ if (!Dygraph.isValidPoint(p1)) continue;
+ var py = p1.canvasy;
+ if (domX > p1.canvasx && rowIdx + 1 < points.length) {
+ // interpolate series Y value using next point
+ var p2 = points[rowIdx + 1];
+ if (Dygraph.isValidPoint(p2)) {
+ var dx = p2.canvasx - p1.canvasx;
+ if (dx > 0) {
+ var r = (domX - p1.canvasx) / dx;
+ py += r * (p2.canvasy - p1.canvasy);
+ }
+ }
+ } else if (domX < p1.canvasx && rowIdx > 0) {
+ // interpolate series Y value using previous point
+ var p0 = points[rowIdx - 1];
+ if (Dygraph.isValidPoint(p0)) {
+ var dx = p1.canvasx - p0.canvasx;
+ if (dx > 0) {
+ var r = (p1.canvasx - domX) / dx;
+ py += r * (p0.canvasy - p1.canvasy);
+ }
+ }
+ }
+ // Stop if the point (domX, py) is above this series' upper edge
+ if (setIdx === 0 || py < domY) {
+ closestPoint = p1;
+ closestSeries = setIdx;
+ }
+ }
+ var name = this.layout_.setNames[closestSeries];
+ return {
+ row: row,
+ seriesName: name,
+ point: closestPoint
+ };
+};
+
+/**
+ * When the mouse moves in the canvas, display information about a nearby data
+ * point and draw dots over those points in the data series. This function
+ * takes care of cleanup of previously-drawn dots.
+ * @param {Object} event The mousemove event from the browser.
+ * @private
+ */
+Dygraph.prototype.mouseMove_ = function(event) {
+ // This prevents JS errors when mousing over the canvas before data loads.
+ var points = this.layout_.points;
+ if (points === undefined || points === null) return;
+
+ var canvasCoords = this.eventToDomCoords(event);
+ var canvasx = canvasCoords[0];
+ var canvasy = canvasCoords[1];
+
+ var highlightSeriesOpts = this.getOption("highlightSeriesOpts");
+ var selectionChanged = false;
+ if (highlightSeriesOpts && !this.isSeriesLocked()) {
+ var closest;
+ if (this.getBooleanOption("stackedGraph")) {
+ closest = this.findStackedPoint(canvasx, canvasy);
+ } else {
+ closest = this.findClosestPoint(canvasx, canvasy);
+ }
+ selectionChanged = this.setSelection(closest.row, closest.seriesName);
+ } else {
+ var idx = this.findClosestRow(canvasx);
+ selectionChanged = this.setSelection(idx);
+ }
+
+ var callback = this.getFunctionOption("highlightCallback");
+ if (callback && selectionChanged) {
+ callback.call(this, event,
+ this.lastx_,
+ this.selPoints_,
+ this.lastRow_,
+ this.highlightSet_);
+ }
+};
+
+/**
+ * Fetch left offset from the specified set index or if not passed, the
+ * first defined boundaryIds record (see bug #236).
+ * @private
+ */
+Dygraph.prototype.getLeftBoundary_ = function(setIdx) {
+ if (this.boundaryIds_[setIdx]) {
+ return this.boundaryIds_[setIdx][0];
+ } else {
+ for (var i = 0; i < this.boundaryIds_.length; i++) {
+ if (this.boundaryIds_[i] !== undefined) {
+ return this.boundaryIds_[i][0];
+ }
+ }
+ return 0;
+ }
+};
+
+Dygraph.prototype.animateSelection_ = function(direction) {
+ var totalSteps = 10;
+ var millis = 30;
+ if (this.fadeLevel === undefined) this.fadeLevel = 0;
+ if (this.animateId === undefined) this.animateId = 0;
+ var start = this.fadeLevel;
+ var steps = direction < 0 ? start : totalSteps - start;
+ if (steps <= 0) {
+ if (this.fadeLevel) {
+ this.updateSelection_(1.0);
+ }
+ return;
+ }
+
+ var thisId = ++this.animateId;
+ var that = this;
+ var cleanupIfClearing = function() {
+ // if we haven't reached fadeLevel 0 in the max frame time,
+ // ensure that the clear happens and just go to 0
+ if (that.fadeLevel !== 0 && direction < 0) {
+ that.fadeLevel = 0;
+ that.clearSelection();
+ }
+ };
+ Dygraph.repeatAndCleanup(
+ function(n) {
+ // ignore simultaneous animations
+ if (that.animateId != thisId) return;
+
+ that.fadeLevel += direction;
+ if (that.fadeLevel === 0) {
+ that.clearSelection();
+ } else {
+ that.updateSelection_(that.fadeLevel / totalSteps);
+ }
+ },
+ steps, millis, cleanupIfClearing);
+};
+
+/**
+ * Draw dots over the selectied points in the data series. This function
+ * takes care of cleanup of previously-drawn dots.
+ * @private
+ */
+Dygraph.prototype.updateSelection_ = function(opt_animFraction) {
+ /*var defaultPrevented = */
+ this.cascadeEvents_('select', {
+ selectedRow: this.lastRow_,
+ selectedX: this.lastx_,
+ selectedPoints: this.selPoints_
+ });
+ // TODO(danvk): use defaultPrevented here?
+
+ // Clear the previously drawn vertical, if there is one
+ var i;
+ var ctx = this.canvas_ctx_;
+ if (this.getOption('highlightSeriesOpts')) {
+ ctx.clearRect(0, 0, this.width_, this.height_);
+ var alpha = 1.0 - this.getNumericOption('highlightSeriesBackgroundAlpha');
+ if (alpha) {
+ // Activating background fade includes an animation effect for a gradual
+ // fade. TODO(klausw): make this independently configurable if it causes
+ // issues? Use a shared preference to control animations?
+ var animateBackgroundFade = true;
+ if (animateBackgroundFade) {
+ if (opt_animFraction === undefined) {
+ // start a new animation
+ this.animateSelection_(1);
+ return;
+ }
+ alpha *= opt_animFraction;
+ }
+ ctx.fillStyle = 'rgba(255,255,255,' + alpha + ')';
+ ctx.fillRect(0, 0, this.width_, this.height_);
+ }
+
+ // Redraw only the highlighted series in the interactive canvas (not the
+ // static plot canvas, which is where series are usually drawn).
+ this.plotter_._renderLineChart(this.highlightSet_, ctx);
+ } else if (this.previousVerticalX_ >= 0) {
+ // Determine the maximum highlight circle size.
+ var maxCircleSize = 0;
+ var labels = this.attr_('labels');
+ for (i = 1; i < labels.length; i++) {
+ var r = this.getNumericOption('highlightCircleSize', labels[i]);
+ if (r > maxCircleSize) maxCircleSize = r;
+ }
+ var px = this.previousVerticalX_;
+ ctx.clearRect(px - maxCircleSize - 1, 0,
+ 2 * maxCircleSize + 2, this.height_);
+ }
+
+ if (this.selPoints_.length > 0) {
+ // Draw colored circles over the center of each selected point
+ var canvasx = this.selPoints_[0].canvasx;
+ ctx.save();
+ for (i = 0; i < this.selPoints_.length; i++) {
+ var pt = this.selPoints_[i];
+ if (!Dygraph.isOK(pt.canvasy)) continue;
+
+ var circleSize = this.getNumericOption('highlightCircleSize', pt.name);
+ var callback = this.getFunctionOption("drawHighlightPointCallback", pt.name);
+ var color = this.plotter_.colors[pt.name];
+ if (!callback) {
+ callback = Dygraph.Circles.DEFAULT;
+ }
+ ctx.lineWidth = this.getNumericOption('strokeWidth', pt.name);
+ ctx.strokeStyle = color;
+ ctx.fillStyle = color;
+ callback.call(this, this, pt.name, ctx, canvasx, pt.canvasy,
+ color, circleSize, pt.idx);
+ }
+ ctx.restore();
+
+ this.previousVerticalX_ = canvasx;
+ }
+};
+
+/**
+ * Manually set the selected points and display information about them in the
+ * legend. The selection can be cleared using clearSelection() and queried
+ * using getSelection().
+ * @param {number} row Row number that should be highlighted (i.e. appear with
+ * hover dots on the chart).
+ * @param {seriesName} optional series name to highlight that series with the
+ * the highlightSeriesOpts setting.
+ * @param { locked } optional If true, keep seriesName selected when mousing
+ * over the graph, disabling closest-series highlighting. Call clearSelection()
+ * to unlock it.
+ */
+Dygraph.prototype.setSelection = function(row, opt_seriesName, opt_locked) {
+ // Extract the points we've selected
+ this.selPoints_ = [];
+
+ var changed = false;
+ if (row !== false && row >= 0) {
+ if (row != this.lastRow_) changed = true;
+ this.lastRow_ = row;
+ for (var setIdx = 0; setIdx < this.layout_.points.length; ++setIdx) {
+ var points = this.layout_.points[setIdx];
+ // Check if the point at the appropriate index is the point we're looking
+ // for. If it is, just use it, otherwise search the array for a point
+ // in the proper place.
+ var setRow = row - this.getLeftBoundary_(setIdx);
+ if (setRow < points.length && points[setRow].idx == row) {
+ var point = points[setRow];
+ if (point.yval !== null) this.selPoints_.push(point);
+ } else {
+ for (var pointIdx = 0; pointIdx < points.length; ++pointIdx) {
+ var point = points[pointIdx];
+ if (point.idx == row) {
+ if (point.yval !== null) {
+ this.selPoints_.push(point);
+ }
+ break;
+ }
+ }
+ }
+ }
+ } else {
+ if (this.lastRow_ >= 0) changed = true;
+ this.lastRow_ = -1;
+ }
+
+ if (this.selPoints_.length) {
+ this.lastx_ = this.selPoints_[0].xval;
+ } else {
+ this.lastx_ = -1;
+ }
+
+ if (opt_seriesName !== undefined) {
+ if (this.highlightSet_ !== opt_seriesName) changed = true;
+ this.highlightSet_ = opt_seriesName;
+ }
+
+ if (opt_locked !== undefined) {
+ this.lockedSet_ = opt_locked;
+ }
+
+ if (changed) {
+ this.updateSelection_(undefined);
+ }
+ return changed;
+};
+
+/**
+ * The mouse has left the canvas. Clear out whatever artifacts remain
+ * @param {Object} event the mouseout event from the browser.
+ * @private
+ */
+Dygraph.prototype.mouseOut_ = function(event) {
+ if (this.getFunctionOption("unhighlightCallback")) {
+ this.getFunctionOption("unhighlightCallback").call(this, event);
+ }
+
+ if (this.getBooleanOption("hideOverlayOnMouseOut") && !this.lockedSet_) {
+ this.clearSelection();
+ }
+};
+
+/**
+ * Clears the current selection (i.e. points that were highlighted by moving
+ * the mouse over the chart).
+ */
+Dygraph.prototype.clearSelection = function() {
+ this.cascadeEvents_('deselect', {});
+
+ this.lockedSet_ = false;
+ // Get rid of the overlay data
+ if (this.fadeLevel) {
+ this.animateSelection_(-1);
+ return;
+ }
+ this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_);
+ this.fadeLevel = 0;
+ this.selPoints_ = [];
+ this.lastx_ = -1;
+ this.lastRow_ = -1;
+ this.highlightSet_ = null;
+};
+
+/**
+ * Returns the number of the currently selected row. To get data for this row,
+ * you can use the getValue method.
+ * @return {number} row number, or -1 if nothing is selected
+ */
+Dygraph.prototype.getSelection = function() {
+ if (!this.selPoints_ || this.selPoints_.length < 1) {
+ return -1;
+ }
+
+ for (var setIdx = 0; setIdx < this.layout_.points.length; setIdx++) {
+ var points = this.layout_.points[setIdx];
+ for (var row = 0; row < points.length; row++) {
+ if (points[row].x == this.selPoints_[0].x) {
+ return points[row].idx;
+ }
+ }
+ }
+ return -1;
+};
+
+/**
+ * Returns the name of the currently-highlighted series.
+ * Only available when the highlightSeriesOpts option is in use.
+ */
+Dygraph.prototype.getHighlightSeries = function() {
+ return this.highlightSet_;
+};
+
+/**
+ * Returns true if the currently-highlighted series was locked
+ * via setSelection(..., seriesName, true).
+ */
+Dygraph.prototype.isSeriesLocked = function() {
+ return this.lockedSet_;
+};
+
+/**
+ * Fires when there's data available to be graphed.
+ * @param {string} data Raw CSV data to be plotted
+ * @private
+ */
+Dygraph.prototype.loadedEvent_ = function(data) {
+ this.rawData_ = this.parseCSV_(data);
+ this.cascadeDataDidUpdateEvent_();
+ this.predraw_();
+};
+
+/**
+ * Add ticks on the x-axis representing years, months, quarters, weeks, or days
+ * @private
+ */
+Dygraph.prototype.addXTicks_ = function() {
+ // Determine the correct ticks scale on the x-axis: quarterly, monthly, ...
+ var range;
+ if (this.dateWindow_) {
+ range = [this.dateWindow_[0], this.dateWindow_[1]];
+ } else {
+ range = this.xAxisExtremes();
+ }
+
+ var xAxisOptionsView = this.optionsViewForAxis_('x');
+ var xTicks = xAxisOptionsView('ticker')(
+ range[0],
+ range[1],
+ this.plotter_.area.w, // TODO(danvk): should be area.width
+ xAxisOptionsView,
+ this);
+ // var msg = 'ticker(' + range[0] + ', ' + range[1] + ', ' + this.width_ + ', ' + this.attr_('pixelsPerXLabel') + ') -> ' + JSON.stringify(xTicks);
+ // console.log(msg);
+ this.layout_.setXTicks(xTicks);
+};
+
+/**
+ * Returns the correct handler class for the currently set options.
+ * @private
+ */
+Dygraph.prototype.getHandlerClass_ = function() {
+ var handlerClass;
+ if (this.attr_('dataHandler')) {
+ handlerClass = this.attr_('dataHandler');
+ } else if (this.fractions_) {
+ if (this.getBooleanOption('errorBars')) {
+ handlerClass = Dygraph.DataHandlers.FractionsBarsHandler;
+ } else {
+ handlerClass = Dygraph.DataHandlers.DefaultFractionHandler;
+ }
+ } else if (this.getBooleanOption('customBars')) {
+ handlerClass = Dygraph.DataHandlers.CustomBarsHandler;
+ } else if (this.getBooleanOption('errorBars')) {
+ handlerClass = Dygraph.DataHandlers.ErrorBarsHandler;
+ } else {
+ handlerClass = Dygraph.DataHandlers.DefaultHandler;
+ }
+ return handlerClass;
+};
+
+/**
+ * @private
+ * This function is called once when the chart's data is changed or the options
+ * dictionary is updated. It is _not_ called when the user pans or zooms. The
+ * idea is that values derived from the chart's data can be computed here,
+ * rather than every time the chart is drawn. This includes things like the
+ * number of axes, rolling averages, etc.
+ */
+Dygraph.prototype.predraw_ = function() {
+ var start = new Date();
+
+ // Create the correct dataHandler
+ this.dataHandler_ = new (this.getHandlerClass_())();
+
+ this.layout_.computePlotArea();
+
+ // TODO(danvk): move more computations out of drawGraph_ and into here.
+ this.computeYAxes_();
+
+ if (!this.is_initial_draw_) {
+ this.canvas_ctx_.restore();
+ this.hidden_ctx_.restore();
+ }
+
+ this.canvas_ctx_.save();
+ this.hidden_ctx_.save();
+
+ // Create a new plotter.
+ this.plotter_ = new DygraphCanvasRenderer(this,
+ this.hidden_,
+ this.hidden_ctx_,
+ this.layout_);
+
+ // The roller sits in the bottom left corner of the chart. We don't know where
+ // this will be until the options are available, so it's positioned here.
+ this.createRollInterface_();
+
+ this.cascadeEvents_('predraw');
+
+ // Convert the raw data (a 2D array) into the internal format and compute
+ // rolling averages.
+ this.rolledSeries_ = [null]; // x-axis is the first series and it's special
+ for (var i = 1; i < this.numColumns(); i++) {
+ // var logScale = this.attr_('logscale', i); // TODO(klausw): this looks wrong // konigsberg thinks so too.
+ var series = this.dataHandler_.extractSeries(this.rawData_, i, this.attributes_);
+ if (this.rollPeriod_ > 1) {
+ series = this.dataHandler_.rollingAverage(series, this.rollPeriod_, this.attributes_);
+ }
+
+ this.rolledSeries_.push(series);
+ }
+
+ // If the data or options have changed, then we'd better redraw.
+ this.drawGraph_();
+
+ // This is used to determine whether to do various animations.
+ var end = new Date();
+ this.drawingTimeMs_ = (end - start);
+};
+
+/**
+ * Point structure.
+ *
+ * xval_* and yval_* are the original unscaled data values,
+ * while x_* and y_* are scaled to the range (0.0-1.0) for plotting.
+ * yval_stacked is the cumulative Y value used for stacking graphs,
+ * and bottom/top/minus/plus are used for error bar graphs.
+ *
+ * @typedef {{
+ * idx: number,
+ * name: string,
+ * x: ?number,
+ * xval: ?number,
+ * y_bottom: ?number,
+ * y: ?number,
+ * y_stacked: ?number,
+ * y_top: ?number,
+ * yval_minus: ?number,
+ * yval: ?number,
+ * yval_plus: ?number,
+ * yval_stacked
+ * }}
+ */
+Dygraph.PointType = undefined;
+
+/**
+ * Calculates point stacking for stackedGraph=true.
+ *
+ * For stacking purposes, interpolate or extend neighboring data across
+ * NaN values based on stackedGraphNaNFill settings. This is for display
+ * only, the underlying data value as shown in the legend remains NaN.
+ *
+ * @param {Array.<Dygraph.PointType>} points Point array for a single series.
+ * Updates each Point's yval_stacked property.
+ * @param {Array.<number>} cumulativeYval Accumulated top-of-graph stacked Y
+ * values for the series seen so far. Index is the row number. Updated
+ * based on the current series's values.
+ * @param {Array.<number>} seriesExtremes Min and max values, updated
+ * to reflect the stacked values.
+ * @param {string} fillMethod Interpolation method, one of 'all', 'inside', or
+ * 'none'.
+ * @private
+ */
+Dygraph.stackPoints_ = function(
+ points, cumulativeYval, seriesExtremes, fillMethod) {
+ var lastXval = null;
+ var prevPoint = null;
+ var nextPoint = null;
+ var nextPointIdx = -1;
+
+ // Find the next stackable point starting from the given index.
+ var updateNextPoint = function(idx) {
+ // If we've previously found a non-NaN point and haven't gone past it yet,
+ // just use that.
+ if (nextPointIdx >= idx) return;
+
+ // We haven't found a non-NaN point yet or have moved past it,
+ // look towards the right to find a non-NaN point.
+ for (var j = idx; j < points.length; ++j) {
+ // Clear out a previously-found point (if any) since it's no longer
+ // valid, we shouldn't use it for interpolation anymore.
+ nextPoint = null;
+ if (!isNaN(points[j].yval) && points[j].yval !== null) {
+ nextPointIdx = j;
+ nextPoint = points[j];
+ break;
+ }
+ }
+ };
+
+ for (var i = 0; i < points.length; ++i) {
+ var point = points[i];
+ var xval = point.xval;
+ if (cumulativeYval[xval] === undefined) {
+ cumulativeYval[xval] = 0;
+ }
+
+ var actualYval = point.yval;
+ if (isNaN(actualYval) || actualYval === null) {
+ if(fillMethod == 'none') {
+ actualYval = 0;
+ } else {
+ // Interpolate/extend for stacking purposes if possible.
+ updateNextPoint(i);
+ if (prevPoint && nextPoint && fillMethod != 'none') {
+ // Use linear interpolation between prevPoint and nextPoint.
+ actualYval = prevPoint.yval + (nextPoint.yval - prevPoint.yval) *
+ ((xval - prevPoint.xval) / (nextPoint.xval - prevPoint.xval));
+ } else if (prevPoint && fillMethod == 'all') {
+ actualYval = prevPoint.yval;
+ } else if (nextPoint && fillMethod == 'all') {
+ actualYval = nextPoint.yval;
+ } else {
+ actualYval = 0;
+ }
+ }
+ } else {
+ prevPoint = point;
+ }
+
+ var stackedYval = cumulativeYval[xval];
+ if (lastXval != xval) {
+ // If an x-value is repeated, we ignore the duplicates.
+ stackedYval += actualYval;
+ cumulativeYval[xval] = stackedYval;
+ }
+ lastXval = xval;
+
+ point.yval_stacked = stackedYval;
+
+ if (stackedYval > seriesExtremes[1]) {
+ seriesExtremes[1] = stackedYval;
+ }
+ if (stackedYval < seriesExtremes[0]) {
+ seriesExtremes[0] = stackedYval;
+ }
+ }
+};
+
+
+/**
+ * Loop over all fields and create datasets, calculating extreme y-values for
+ * each series and extreme x-indices as we go.
+ *
+ * dateWindow is passed in as an explicit parameter so that we can compute
+ * extreme values "speculatively", i.e. without actually setting state on the
+ * dygraph.
+ *
+ * @param {Array.<Array.<Array.<(number|Array<number>)>>} rolledSeries, where
+ * rolledSeries[seriesIndex][row] = raw point, where
+ * seriesIndex is the column number starting with 1, and
+ * rawPoint is [x,y] or [x, [y, err]] or [x, [y, yminus, yplus]].
+ * @param {?Array.<number>} dateWindow [xmin, xmax] pair, or null.
+ * @return {{
+ * points: Array.<Array.<Dygraph.PointType>>,
+ * seriesExtremes: Array.<Array.<number>>,
+ * boundaryIds: Array.<number>}}
+ * @private
+ */
+Dygraph.prototype.gatherDatasets_ = function(rolledSeries, dateWindow) {
+ var boundaryIds = [];
+ var points = [];
+ var cumulativeYval = []; // For stacked series.
+ var extremes = {}; // series name -> [low, high]
+ var seriesIdx, sampleIdx;
+ var firstIdx, lastIdx;
+ var axisIdx;
+
+ // Loop over the fields (series). Go from the last to the first,
+ // because if they're stacked that's how we accumulate the values.
+ var num_series = rolledSeries.length - 1;
+ var series;
+ for (seriesIdx = num_series; seriesIdx >= 1; seriesIdx--) {
+ if (!this.visibility()[seriesIdx - 1]) continue;
+
+ // Prune down to the desired range, if necessary (for zooming)
+ // Because there can be lines going to points outside of the visible area,
+ // we actually prune to visible points, plus one on either side.
+ if (dateWindow) {
+ series = rolledSeries[seriesIdx];
+ var low = dateWindow[0];
+ var high = dateWindow[1];
+
+ // TODO(danvk): do binary search instead of linear search.
+ // TODO(danvk): pass firstIdx and lastIdx directly to the renderer.
+ firstIdx = null;
+ lastIdx = null;
+ for (sampleIdx = 0; sampleIdx < series.length; sampleIdx++) {
+ if (series[sampleIdx][0] >= low && firstIdx === null) {
+ firstIdx = sampleIdx;
+ }
+ if (series[sampleIdx][0] <= high) {
+ lastIdx = sampleIdx;
+ }
+ }
+
+ if (firstIdx === null) firstIdx = 0;
+ var correctedFirstIdx = firstIdx;
+ var isInvalidValue = true;
+ while (isInvalidValue && correctedFirstIdx > 0) {
+ correctedFirstIdx--;
+ // check if the y value is null.
+ isInvalidValue = series[correctedFirstIdx][1] === null;
+ }
+
+ if (lastIdx === null) lastIdx = series.length - 1;
+ var correctedLastIdx = lastIdx;
+ isInvalidValue = true;
+ while (isInvalidValue && correctedLastIdx < series.length - 1) {
+ correctedLastIdx++;
+ isInvalidValue = series[correctedLastIdx][1] === null;
+ }
+
+ if (correctedFirstIdx!==firstIdx) {
+ firstIdx = correctedFirstIdx;
+ }
+ if (correctedLastIdx !== lastIdx) {
+ lastIdx = correctedLastIdx;
+ }
+
+ boundaryIds[seriesIdx-1] = [firstIdx, lastIdx];
+
+ // .slice's end is exclusive, we want to include lastIdx.
+ series = series.slice(firstIdx, lastIdx + 1);
+ } else {
+ series = rolledSeries[seriesIdx];
+ boundaryIds[seriesIdx-1] = [0, series.length-1];
+ }
+
+ var seriesName = this.attr_("labels")[seriesIdx];
+ var seriesExtremes = this.dataHandler_.getExtremeYValues(series,
+ dateWindow, this.getBooleanOption("stepPlot",seriesName));
+
+ var seriesPoints = this.dataHandler_.seriesToPoints(series,
+ seriesName, boundaryIds[seriesIdx-1][0]);
+
+ if (this.getBooleanOption("stackedGraph")) {
+ axisIdx = this.attributes_.axisForSeries(seriesName);
+ if (cumulativeYval[axisIdx] === undefined) {
+ cumulativeYval[axisIdx] = [];
+ }
+ Dygraph.stackPoints_(seriesPoints, cumulativeYval[axisIdx], seriesExtremes,
+ this.getBooleanOption("stackedGraphNaNFill"));
+ }
+
+ extremes[seriesName] = seriesExtremes;
+ points[seriesIdx] = seriesPoints;
+ }
+
+ return { points: points, extremes: extremes, boundaryIds: boundaryIds };
+};
+
+/**
+ * Update the graph with new data. This method is called when the viewing area
+ * has changed. If the underlying data or options have changed, predraw_ will
+ * be called before drawGraph_ is called.
+ *
+ * @private
+ */
+Dygraph.prototype.drawGraph_ = function() {
+ var start = new Date();
+
+ // This is used to set the second parameter to drawCallback, below.
+ var is_initial_draw = this.is_initial_draw_;
+ this.is_initial_draw_ = false;
+
+ this.layout_.removeAllDatasets();
+ this.setColors_();
+ this.attrs_.pointSize = 0.5 * this.getNumericOption('highlightCircleSize');
+
+ var packed = this.gatherDatasets_(this.rolledSeries_, this.dateWindow_);
+ var points = packed.points;
+ var extremes = packed.extremes;
+ this.boundaryIds_ = packed.boundaryIds;
+
+ this.setIndexByName_ = {};
+ var labels = this.attr_("labels");
+ if (labels.length > 0) {
+ this.setIndexByName_[labels[0]] = 0;
+ }
+ var dataIdx = 0;
+ for (var i = 1; i < points.length; i++) {
+ this.setIndexByName_[labels[i]] = i;
+ if (!this.visibility()[i - 1]) continue;
+ this.layout_.addDataset(labels[i], points[i]);
+ this.datasetIndex_[i] = dataIdx++;
+ }
+
+ this.computeYAxisRanges_(extremes);
+ this.layout_.setYAxes(this.axes_);
+
+ this.addXTicks_();
+
+ // Save the X axis zoomed status as the updateOptions call will tend to set it erroneously
+ var tmp_zoomed_x = this.zoomed_x_;
+ // Tell PlotKit to use this new data and render itself
+ this.zoomed_x_ = tmp_zoomed_x;
+ this.layout_.evaluate();
+ this.renderGraph_(is_initial_draw);
+
+ if (this.getStringOption("timingName")) {
+ var end = new Date();
+ console.log(this.getStringOption("timingName") + " - drawGraph: " + (end - start) + "ms");
+ }
+};
+
+/**
+ * This does the work of drawing the chart. It assumes that the layout and axis
+ * scales have already been set (e.g. by predraw_).
+ *
+ * @private
+ */
+Dygraph.prototype.renderGraph_ = function(is_initial_draw) {
+ this.cascadeEvents_('clearChart');
+ this.plotter_.clear();
+
+ if (this.getFunctionOption('underlayCallback')) {
+ // NOTE: we pass the dygraph object to this callback twice to avoid breaking
+ // users who expect a deprecated form of this callback.
+ this.getFunctionOption('underlayCallback').call(this,
+ this.hidden_ctx_, this.layout_.getPlotArea(), this, this);
+ }
+
+ var e = {
+ canvas: this.hidden_,
+ drawingContext: this.hidden_ctx_
+ };
+ this.cascadeEvents_('willDrawChart', e);
+ this.plotter_.render();
+ this.cascadeEvents_('didDrawChart', e);
+ this.lastRow_ = -1; // because plugins/legend.js clears the legend
+
+ // TODO(danvk): is this a performance bottleneck when panning?
+ // The interaction canvas should already be empty in that situation.
+ this.canvas_.getContext('2d').clearRect(0, 0, this.width_, this.height_);
+
+ if (this.getFunctionOption("drawCallback") !== null) {
+ this.getFunctionOption("drawCallback")(this, is_initial_draw);
+ }
+ if (is_initial_draw) {
+ this.readyFired_ = true;
+ while (this.readyFns_.length > 0) {
+ var fn = this.readyFns_.pop();
+ fn(this);
+ }
+ }
+};
+
+/**
+ * @private
+ * Determine properties of the y-axes which are independent of the data
+ * currently being displayed. This includes things like the number of axes and
+ * the style of the axes. It does not include the range of each axis and its
+ * tick marks.
+ * This fills in this.axes_.
+ * axes_ = [ { options } ]
+ * indices are into the axes_ array.
+ */
+Dygraph.prototype.computeYAxes_ = function() {
+ // Preserve valueWindow settings if they exist, and if the user hasn't
+ // specified a new valueRange.
+ var valueWindows, axis, index, opts, v;
+ if (this.axes_ !== undefined && this.user_attrs_.hasOwnProperty("valueRange") === false) {
+ valueWindows = [];
+ for (index = 0; index < this.axes_.length; index++) {
+ valueWindows.push(this.axes_[index].valueWindow);
+ }
+ }
+
+ // this.axes_ doesn't match this.attributes_.axes_.options. It's used for
+ // data computation as well as options storage.
+ // Go through once and add all the axes.
+ this.axes_ = [];
+
+ for (axis = 0; axis < this.attributes_.numAxes(); axis++) {
+ // Add a new axis, making a copy of its per-axis options.
+ opts = { g : this };
+ Dygraph.update(opts, this.attributes_.axisOptions(axis));
+ this.axes_[axis] = opts;
+ }
+
+
+ // Copy global valueRange option over to the first axis.
+ // NOTE(konigsberg): Are these two statements necessary?
+ // I tried removing it. The automated tests pass, and manually
+ // messing with tests/zoom.html showed no trouble.
+ v = this.attr_('valueRange');
+ if (v) this.axes_[0].valueRange = v;
+
+ if (valueWindows !== undefined) {
+ // Restore valueWindow settings.
+
+ // When going from two axes back to one, we only restore
+ // one axis.
+ var idxCount = Math.min(valueWindows.length, this.axes_.length);
+
+ for (index = 0; index < idxCount; index++) {
+ this.axes_[index].valueWindow = valueWindows[index];
+ }
+ }
+
+ for (axis = 0; axis < this.axes_.length; axis++) {
+ if (axis === 0) {
+ opts = this.optionsViewForAxis_('y' + (axis ? '2' : ''));
+ v = opts("valueRange");
+ if (v) this.axes_[axis].valueRange = v;
+ } else { // To keep old behavior
+ var axes = this.user_attrs_.axes;
+ if (axes && axes.y2) {
+ v = axes.y2.valueRange;
+ if (v) this.axes_[axis].valueRange = v;
+ }
+ }
+ }
+};
+
+/**
+ * Returns the number of y-axes on the chart.
+ * @return {number} the number of axes.
+ */
+Dygraph.prototype.numAxes = function() {
+ return this.attributes_.numAxes();
+};
+
+/**
+ * @private
+ * Returns axis properties for the given series.
+ * @param {string} setName The name of the series for which to get axis
+ * properties, e.g. 'Y1'.
+ * @return {Object} The axis properties.
+ */
+Dygraph.prototype.axisPropertiesForSeries = function(series) {
+ // TODO(danvk): handle errors.
+ return this.axes_[this.attributes_.axisForSeries(series)];
+};
+
+/**
+ * @private
+ * Determine the value range and tick marks for each axis.
+ * @param {Object} extremes A mapping from seriesName -> [low, high]
+ * This fills in the valueRange and ticks fields in each entry of this.axes_.
+ */
+Dygraph.prototype.computeYAxisRanges_ = function(extremes) {
+ var isNullUndefinedOrNaN = function(num) {
+ return isNaN(parseFloat(num));
+ };
+ var numAxes = this.attributes_.numAxes();
+ var ypadCompat, span, series, ypad;
+
+ var p_axis;
+
+ // Compute extreme values, a span and tick marks for each axis.
+ for (var i = 0; i < numAxes; i++) {
+ var axis = this.axes_[i];
+ var logscale = this.attributes_.getForAxis("logscale", i);
+ var includeZero = this.attributes_.getForAxis("includeZero", i);
+ var independentTicks = this.attributes_.getForAxis("independentTicks", i);
+ series = this.attributes_.seriesForAxis(i);
+
+ // Add some padding. This supports two Y padding operation modes:
+ //
+ // - backwards compatible (yRangePad not set):
+ // 10% padding for automatic Y ranges, but not for user-supplied
+ // ranges, and move a close-to-zero edge to zero except if
+ // avoidMinZero is set, since drawing at the edge results in
+ // invisible lines. Unfortunately lines drawn at the edge of a
+ // user-supplied range will still be invisible. If logscale is
+ // set, add a variable amount of padding at the top but
+ // none at the bottom.
+ //
+ // - new-style (yRangePad set by the user):
+ // always add the specified Y padding.
+ //
+ ypadCompat = true;
+ ypad = 0.1; // add 10%
+ if (this.getNumericOption('yRangePad') !== null) {
+ ypadCompat = false;
+ // Convert pixel padding to ratio
+ ypad = this.getNumericOption('yRangePad') / this.plotter_.area.h;
+ }
+
+ if (series.length === 0) {
+ // If no series are defined or visible then use a reasonable default
+ axis.extremeRange = [0, 1];
+ } else {
+ // Calculate the extremes of extremes.
+ var minY = Infinity; // extremes[series[0]][0];
+ var maxY = -Infinity; // extremes[series[0]][1];
+ var extremeMinY, extremeMaxY;
+
+ for (var j = 0; j < series.length; j++) {
+ // this skips invisible series
+ if (!extremes.hasOwnProperty(series[j])) continue;
+
+ // Only use valid extremes to stop null data series' from corrupting the scale.
+ extremeMinY = extremes[series[j]][0];
+ if (extremeMinY !== null) {
+ minY = Math.min(extremeMinY, minY);
+ }
+ extremeMaxY = extremes[series[j]][1];
+ if (extremeMaxY !== null) {
+ maxY = Math.max(extremeMaxY, maxY);
+ }
+ }
+
+ // Include zero if requested by the user.
+ if (includeZero && !logscale) {
+ if (minY > 0) minY = 0;
+ if (maxY < 0) maxY = 0;
+ }
+
+ // Ensure we have a valid scale, otherwise default to [0, 1] for safety.
+ if (minY == Infinity) minY = 0;
+ if (maxY == -Infinity) maxY = 1;
+
+ span = maxY - minY;
+ // special case: if we have no sense of scale, center on the sole value.
+ if (span === 0) {
+ if (maxY !== 0) {
+ span = Math.abs(maxY);
+ } else {
+ // ... and if the sole value is zero, use range 0-1.
+ maxY = 1;
+ span = 1;
+ }
+ }
+
+ var maxAxisY, minAxisY;
+ if (logscale) {
+ if (ypadCompat) {
+ maxAxisY = maxY + ypad * span;
+ minAxisY = minY;
+ } else {
+ var logpad = Math.exp(Math.log(span) * ypad);
+ maxAxisY = maxY * logpad;
+ minAxisY = minY / logpad;
+ }
+ } else {
+ maxAxisY = maxY + ypad * span;
+ minAxisY = minY - ypad * span;
+
+ // Backwards-compatible behavior: Move the span to start or end at zero if it's
+ // close to zero, but not if avoidMinZero is set.
+ if (ypadCompat && !this.getBooleanOption("avoidMinZero")) {
+ if (minAxisY < 0 && minY >= 0) minAxisY = 0;
+ if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0;
+ }
+ }
+ axis.extremeRange = [minAxisY, maxAxisY];
+ }
+ if (axis.valueWindow) {
+ // This is only set if the user has zoomed on the y-axis. It is never set
+ // by a user. It takes precedence over axis.valueRange because, if you set
+ // valueRange, you'd still expect to be able to pan.
+ axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]];
+ } else if (axis.valueRange) {
+ // This is a user-set value range for this axis.
+ var y0 = isNullUndefinedOrNaN(axis.valueRange[0]) ? axis.extremeRange[0] : axis.valueRange[0];
+ var y1 = isNullUndefinedOrNaN(axis.valueRange[1]) ? axis.extremeRange[1] : axis.valueRange[1];
+ if (!ypadCompat) {
+ if (axis.logscale) {
+ var logpad = Math.exp(Math.log(span) * ypad);
+ y0 *= logpad;
+ y1 /= logpad;
+ } else {
+ span = y1 - y0;
+ y0 -= span * ypad;
+ y1 += span * ypad;
+ }
+ }
+ axis.computedValueRange = [y0, y1];
+ } else {
+ axis.computedValueRange = axis.extremeRange;
+ }
+
+
+ if (independentTicks) {
+ axis.independentTicks = independentTicks;
+ var opts = this.optionsViewForAxis_('y' + (i ? '2' : ''));
+ var ticker = opts('ticker');
+ axis.ticks = ticker(axis.computedValueRange[0],
+ axis.computedValueRange[1],
+ this.plotter_.area.h,
+ opts,
+ this);
+ // Define the first independent axis as primary axis.
+ if (!p_axis) p_axis = axis;
+ }
+ }
+ if (p_axis === undefined) {
+ throw ("Configuration Error: At least one axis has to have the \"independentTicks\" option activated.");
+ }
+ // Add ticks. By default, all axes inherit the tick positions of the
+ // primary axis. However, if an axis is specifically marked as having
+ // independent ticks, then that is permissible as well.
+ for (var i = 0; i < numAxes; i++) {
+ var axis = this.axes_[i];
+
+ if (!axis.independentTicks) {
+ var opts = this.optionsViewForAxis_('y' + (i ? '2' : ''));
+ var ticker = opts('ticker');
+ var p_ticks = p_axis.ticks;
+ var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0];
+ var scale = axis.computedValueRange[1] - axis.computedValueRange[0];
+ var tick_values = [];
+ for (var k = 0; k < p_ticks.length; k++) {
+ var y_frac = (p_ticks[k].v - p_axis.computedValueRange[0]) / p_scale;
+ var y_val = axis.computedValueRange[0] + y_frac * scale;
+ tick_values.push(y_val);
+ }
+
+ axis.ticks = ticker(axis.computedValueRange[0],
+ axis.computedValueRange[1],
+ this.plotter_.area.h,
+ opts,
+ this,
+ tick_values);
+ }
+ }
+};
+
+/**
+ * Detects the type of the str (date or numeric) and sets the various
+ * formatting attributes in this.attrs_ based on this type.
+ * @param {string} str An x value.
+ * @private
+ */
+Dygraph.prototype.detectTypeFromString_ = function(str) {
+ var isDate = false;
+ var dashPos = str.indexOf('-'); // could be 2006-01-01 _or_ 1.0e-2
+ if ((dashPos > 0 && (str[dashPos-1] != 'e' && str[dashPos-1] != 'E')) ||
+ str.indexOf('/') >= 0 ||
+ isNaN(parseFloat(str))) {
+ isDate = true;
+ } else if (str.length == 8 && str > '19700101' && str < '20371231') {
+ // TODO(danvk): remove support for this format.
+ isDate = true;
+ }
+
+ this.setXAxisOptions_(isDate);
+};
+
+Dygraph.prototype.setXAxisOptions_ = function(isDate) {
+ if (isDate) {
+ this.attrs_.xValueParser = Dygraph.dateParser;
+ this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter;
+ this.attrs_.axes.x.ticker = Dygraph.dateTicker;
+ this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter;
+ } else {
+ /** @private (shut up, jsdoc!) */
+ this.attrs_.xValueParser = function(x) { return parseFloat(x); };
+ // TODO(danvk): use Dygraph.numberValueFormatter here?
+ /** @private (shut up, jsdoc!) */
+ this.attrs_.axes.x.valueFormatter = function(x) { return x; };
+ this.attrs_.axes.x.ticker = Dygraph.numericTicks;
+ this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter;
+ }
+};
+
+/**
+ * @private
+ * Parses a string in a special csv format. We expect a csv file where each
+ * line is a date point, and the first field in each line is the date string.
+ * We also expect that all remaining fields represent series.
+ * if the errorBars attribute is set, then interpret the fields as:
+ * date, series1, stddev1, series2, stddev2, ...
+ * @param {[Object]} data See above.
+ *
+ * @return [Object] An array with one entry for each row. These entries
+ * are an array of cells in that row. The first entry is the parsed x-value for
+ * the row. The second, third, etc. are the y-values. These can take on one of
+ * three forms, depending on the CSV and constructor parameters:
+ * 1. numeric value
+ * 2. [ value, stddev ]
+ * 3. [ low value, center value, high value ]
+ */
+Dygraph.prototype.parseCSV_ = function(data) {
+ var ret = [];
+ var line_delimiter = Dygraph.detectLineDelimiter(data);
+ var lines = data.split(line_delimiter || "\n");
+ var vals, j;
+
+ // Use the default delimiter or fall back to a tab if that makes sense.
+ var delim = this.getStringOption('delimiter');
+ if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) {
+ delim = '\t';
+ }
+
+ var start = 0;
+ if (!('labels' in this.user_attrs_)) {
+ // User hasn't explicitly set labels, so they're (presumably) in the CSV.
+ start = 1;
+ this.attrs_.labels = lines[0].split(delim); // NOTE: _not_ user_attrs_.
+ this.attributes_.reparseSeries();
+ }
+ var line_no = 0;
+
+ var xParser;
+ var defaultParserSet = false; // attempt to auto-detect x value type
+ var expectedCols = this.attr_("labels").length;
+ var outOfOrder = false;
+ for (var i = start; i < lines.length; i++) {
+ var line = lines[i];
+ line_no = i;
+ if (line.length === 0) continue; // skip blank lines
+ if (line[0] == '#') continue; // skip comment lines
+ var inFields = line.split(delim);
+ if (inFields.length < 2) continue;
+
+ var fields = [];
+ if (!defaultParserSet) {
+ this.detectTypeFromString_(inFields[0]);
+ xParser = this.getFunctionOption("xValueParser");
+ defaultParserSet = true;
+ }
+ fields[0] = xParser(inFields[0], this);
+
+ // If fractions are expected, parse the numbers as "A/B"
+ if (this.fractions_) {
+ for (j = 1; j < inFields.length; j++) {
+ // TODO(danvk): figure out an appropriate way to flag parse errors.
+ vals = inFields[j].split("/");
+ if (vals.length != 2) {
+ console.error('Expected fractional "num/den" values in CSV data ' +
+ "but found a value '" + inFields[j] + "' on line " +
+ (1 + i) + " ('" + line + "') which is not of this form.");
+ fields[j] = [0, 0];
+ } else {
+ fields[j] = [Dygraph.parseFloat_(vals[0], i, line),
+ Dygraph.parseFloat_(vals[1], i, line)];
+ }
+ }
+ } else if (this.getBooleanOption("errorBars")) {
+ // If there are error bars, values are (value, stddev) pairs
+ if (inFields.length % 2 != 1) {
+ console.error('Expected alternating (value, stdev.) pairs in CSV data ' +
+ 'but line ' + (1 + i) + ' has an odd number of values (' +
+ (inFields.length - 1) + "): '" + line + "'");
+ }
+ for (j = 1; j < inFields.length; j += 2) {
+ fields[(j + 1) / 2] = [Dygraph.parseFloat_(inFields[j], i, line),
+ Dygraph.parseFloat_(inFields[j + 1], i, line)];
+ }
+ } else if (this.getBooleanOption("customBars")) {
+ // Bars are a low;center;high tuple
+ for (j = 1; j < inFields.length; j++) {
+ var val = inFields[j];
+ if (/^ *$/.test(val)) {
+ fields[j] = [null, null, null];
+ } else {
+ vals = val.split(";");
+ if (vals.length == 3) {
+ fields[j] = [ Dygraph.parseFloat_(vals[0], i, line),
+ Dygraph.parseFloat_(vals[1], i, line),
+ Dygraph.parseFloat_(vals[2], i, line) ];
+ } else {
+ console.warn('When using customBars, values must be either blank ' +
+ 'or "low;center;high" tuples (got "' + val +
+ '" on line ' + (1+i));
+ }
+ }
+ }
+ } else {
+ // Values are just numbers
+ for (j = 1; j < inFields.length; j++) {
+ fields[j] = Dygraph.parseFloat_(inFields[j], i, line);
+ }
+ }
+ if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) {
+ outOfOrder = true;
+ }
+
+ if (fields.length != expectedCols) {
+ console.error("Number of columns in line " + i + " (" + fields.length +
+ ") does not agree with number of labels (" + expectedCols +
+ ") " + line);
+ }
+
+ // If the user specified the 'labels' option and none of the cells of the
+ // first row parsed correctly, then they probably double-specified the
+ // labels. We go with the values set in the option, discard this row and
+ // log a warning to the JS console.
+ if (i === 0 && this.attr_('labels')) {
+ var all_null = true;
+ for (j = 0; all_null && j < fields.length; j++) {
+ if (fields[j]) all_null = false;
+ }
+ if (all_null) {
+ console.warn("The dygraphs 'labels' option is set, but the first row " +
+ "of CSV data ('" + line + "') appears to also contain " +
+ "labels. Will drop the CSV labels and use the option " +
+ "labels.");
+ continue;
+ }
+ }
+ ret.push(fields);
+ }
+
+ if (outOfOrder) {
+ console.warn("CSV is out of order; order it correctly to speed loading.");
+ ret.sort(function(a,b) { return a[0] - b[0]; });
+ }
+
+ return ret;
+};
+
+/**
+ * The user has provided their data as a pre-packaged JS array. If the x values
+ * are numeric, this is the same as dygraphs' internal format. If the x values
+ * are dates, we need to convert them from Date objects to ms since epoch.
+ * @param {!Array} data
+ * @return {Object} data with numeric x values.
+ * @private
+ */
+Dygraph.prototype.parseArray_ = function(data) {
+ // Peek at the first x value to see if it's numeric.
+ if (data.length === 0) {
+ console.error("Can't plot empty data set");
+ return null;
+ }
+ if (data[0].length === 0) {
+ console.error("Data set cannot contain an empty row");
+ return null;
+ }
+
+ var i;
+ if (this.attr_("labels") === null) {
+ console.warn("Using default labels. Set labels explicitly via 'labels' " +
+ "in the options parameter");
+ this.attrs_.labels = [ "X" ];
+ for (i = 1; i < data[0].length; i++) {
+ this.attrs_.labels.push("Y" + i); // Not user_attrs_.
+ }
+ this.attributes_.reparseSeries();
+ } else {
+ var num_labels = this.attr_("labels");
+ if (num_labels.length != data[0].length) {
+ console.error("Mismatch between number of labels (" + num_labels + ")" +
+ " and number of columns in array (" + data[0].length + ")");
+ return null;
+ }
+ }
+
+ if (Dygraph.isDateLike(data[0][0])) {
+ // Some intelligent defaults for a date x-axis.
+ this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter;
+ this.attrs_.axes.x.ticker = Dygraph.dateTicker;
+ this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter;
+
+ // Assume they're all dates.
+ var parsedData = Dygraph.clone(data);
+ for (i = 0; i < data.length; i++) {
+ if (parsedData[i].length === 0) {
+ console.error("Row " + (1 + i) + " of data is empty");
+ return null;
+ }
+ if (parsedData[i][0] === null ||
+ typeof(parsedData[i][0].getTime) != 'function' ||
+ isNaN(parsedData[i][0].getTime())) {
+ console.error("x value in row " + (1 + i) + " is not a Date");
+ return null;
+ }
+ parsedData[i][0] = parsedData[i][0].getTime();
+ }
+ return parsedData;
+ } else {
+ // Some intelligent defaults for a numeric x-axis.
+ /** @private (shut up, jsdoc!) */
+ this.attrs_.axes.x.valueFormatter = function(x) { return x; };
+ this.attrs_.axes.x.ticker = Dygraph.numericTicks;
+ this.attrs_.axes.x.axisLabelFormatter = Dygraph.numberAxisLabelFormatter;
+ return data;
+ }
+};
+
+/**
+ * Parses a DataTable object from gviz.
+ * The data is expected to have a first column that is either a date or a
+ * number. All subsequent columns must be numbers. If there is a clear mismatch
+ * between this.xValueParser_ and the type of the first column, it will be
+ * fixed. Fills out rawData_.
+ * @param {!google.visualization.DataTable} data See above.
+ * @private
+ */
+Dygraph.prototype.parseDataTable_ = function(data) {
+ var shortTextForAnnotationNum = function(num) {
+ // converts [0-9]+ [A-Z][a-z]*
+ // example: 0=A, 1=B, 25=Z, 26=Aa, 27=Ab
+ // and continues like.. Ba Bb .. Za .. Zz..Aaa...Zzz Aaaa Zzzz
+ var shortText = String.fromCharCode(65 /* A */ + num % 26);
+ num = Math.floor(num / 26);
+ while ( num > 0 ) {
+ shortText = String.fromCharCode(65 /* A */ + (num - 1) % 26 ) + shortText.toLowerCase();
+ num = Math.floor((num - 1) / 26);
+ }
+ return shortText;
+ };
+
+ var cols = data.getNumberOfColumns();
+ var rows = data.getNumberOfRows();
+
+ var indepType = data.getColumnType(0);
+ if (indepType == 'date' || indepType == 'datetime') {
+ this.attrs_.xValueParser = Dygraph.dateParser;
+ this.attrs_.axes.x.valueFormatter = Dygraph.dateValueFormatter;
+ this.attrs_.axes.x.ticker = Dygraph.dateTicker;
+ this.attrs_.axes.x.axisLabelFormatter = Dygraph.dateAxisLabelFormatter;
+ } else if (indepType == 'number') {
+ this.attrs_.xValueParser = function(x) { return parseFloat(x); };
+ this.attrs_.axes.x.valueFormatter = function(x) { return x; };
+ this.attrs_.axes.x.ticker = Dygraph.numericTicks;
+ this.attrs_.axes.x.axisLabelFormatter = this.attrs_.axes.x.valueFormatter;
+ } else {
+ console.error("only 'date', 'datetime' and 'number' types are supported " +
+ "for column 1 of DataTable input (Got '" + indepType + "')");
+ return null;
+ }
+
+ // Array of the column indices which contain data (and not annotations).
+ var colIdx = [];
+ var annotationCols = {}; // data index -> [annotation cols]
+ var hasAnnotations = false;
+ var i, j;
+ for (i = 1; i < cols; i++) {
+ var type = data.getColumnType(i);
+ if (type == 'number') {
+ colIdx.push(i);
+ } else if (type == 'string' && this.getBooleanOption('displayAnnotations')) {
+ // This is OK -- it's an annotation column.
+ var dataIdx = colIdx[colIdx.length - 1];
+ if (!annotationCols.hasOwnProperty(dataIdx)) {
+ annotationCols[dataIdx] = [i];
+ } else {
+ annotationCols[dataIdx].push(i);
+ }
+ hasAnnotations = true;
+ } else {
+ console.error("Only 'number' is supported as a dependent type with Gviz." +
+ " 'string' is only supported if displayAnnotations is true");
+ }
+ }
+
+ // Read column labels
+ // TODO(danvk): add support back for errorBars
+ var labels = [data.getColumnLabel(0)];
+ for (i = 0; i < colIdx.length; i++) {
+ labels.push(data.getColumnLabel(colIdx[i]));
+ if (this.getBooleanOption("errorBars")) i += 1;
+ }
+ this.attrs_.labels = labels;
+ cols = labels.length;
+
+ var ret = [];
+ var outOfOrder = false;
+ var annotations = [];
+ for (i = 0; i < rows; i++) {
+ var row = [];
+ if (typeof(data.getValue(i, 0)) === 'undefined' ||
+ data.getValue(i, 0) === null) {
+ console.warn("Ignoring row " + i +
+ " of DataTable because of undefined or null first column.");
+ continue;
+ }
+
+ if (indepType == 'date' || indepType == 'datetime') {
+ row.push(data.getValue(i, 0).getTime());
+ } else {
+ row.push(data.getValue(i, 0));
+ }
+ if (!this.getBooleanOption("errorBars")) {
+ for (j = 0; j < colIdx.length; j++) {
+ var col = colIdx[j];
+ row.push(data.getValue(i, col));
+ if (hasAnnotations &&
+ annotationCols.hasOwnProperty(col) &&
+ data.getValue(i, annotationCols[col][0]) !== null) {
+ var ann = {};
+ ann.series = data.getColumnLabel(col);
+ ann.xval = row[0];
+ ann.shortText = shortTextForAnnotationNum(annotations.length);
+ ann.text = '';
+ for (var k = 0; k < annotationCols[col].length; k++) {
+ if (k) ann.text += "\n";
+ ann.text += data.getValue(i, annotationCols[col][k]);
+ }
+ annotations.push(ann);
+ }
+ }
+
+ // Strip out infinities, which give dygraphs problems later on.
+ for (j = 0; j < row.length; j++) {
+ if (!isFinite(row[j])) row[j] = null;
+ }
+ } else {
+ for (j = 0; j < cols - 1; j++) {
+ row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]);
+ }
+ }
+ if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) {
+ outOfOrder = true;
+ }
+ ret.push(row);
+ }
+
+ if (outOfOrder) {
+ console.warn("DataTable is out of order; order it correctly to speed loading.");
+ ret.sort(function(a,b) { return a[0] - b[0]; });
+ }
+ this.rawData_ = ret;
+
+ if (annotations.length > 0) {
+ this.setAnnotations(annotations, true);
+ }
+ this.attributes_.reparseSeries();
+};
+
+/**
+ * Signals to plugins that the chart data has updated.
+ * This happens after the data has updated but before the chart has redrawn.
+ */
+Dygraph.prototype.cascadeDataDidUpdateEvent_ = function() {
+ // TODO(danvk): there are some issues checking xAxisRange() and using
+ // toDomCoords from handlers of this event. The visible range should be set
+ // when the chart is drawn, not derived from the data.
+ this.cascadeEvents_('dataDidUpdate', {});
+};
+
+/**
+ * Get the CSV data. If it's in a function, call that function. If it's in a
+ * file, do an XMLHttpRequest to get it.
+ * @private
+ */
+Dygraph.prototype.start_ = function() {
+ var data = this.file_;
+
+ // Functions can return references of all other types.
+ if (typeof data == 'function') {
+ data = data();
+ }
+
+ if (Dygraph.isArrayLike(data)) {
+ this.rawData_ = this.parseArray_(data);
+ this.cascadeDataDidUpdateEvent_();
+ this.predraw_();
+ } else if (typeof data == 'object' &&
+ typeof data.getColumnRange == 'function') {
+ // must be a DataTable from gviz.
+ this.parseDataTable_(data);
+ this.cascadeDataDidUpdateEvent_();
+ this.predraw_();
+ } else if (typeof data == 'string') {
+ // Heuristic: a newline means it's CSV data. Otherwise it's an URL.
+ var line_delimiter = Dygraph.detectLineDelimiter(data);
+ if (line_delimiter) {
+ this.loadedEvent_(data);
+ } else {
+ // REMOVE_FOR_IE
+ var req;
+ if (window.XMLHttpRequest) {
+ // Firefox, Opera, IE7, and other browsers will use the native object
+ req = new XMLHttpRequest();
+ } else {
+ // IE 5 and 6 will use the ActiveX control
+ req = new ActiveXObject("Microsoft.XMLHTTP");
+ }
+
+ var caller = this;
+ req.onreadystatechange = function () {
+ if (req.readyState == 4) {
+ if (req.status === 200 || // Normal http
+ req.status === 0) { // Chrome w/ --allow-file-access-from-files
+ caller.loadedEvent_(req.responseText);
+ }
+ }
+ };
+
+ req.open("GET", data, true);
+ req.send(null);
+ }
+ } else {
+ console.error("Unknown data format: " + (typeof data));
+ }
+};
+
+/**
+ * Changes various properties of the graph. These can include:
+ * <ul>
+ * <li>file: changes the source data for the graph</li>
+ * <li>errorBars: changes whether the data contains stddev</li>
+ * </ul>
+ *
+ * There's a huge variety of options that can be passed to this method. For a
+ * full list, see http://dygraphs.com/options.html.
+ *
+ * @param {Object} input_attrs The new properties and values
+ * @param {boolean} block_redraw Usually the chart is redrawn after every
+ * call to updateOptions(). If you know better, you can pass true to
+ * explicitly block the redraw. This can be useful for chaining
+ * updateOptions() calls, avoiding the occasional infinite loop and
+ * preventing redraws when it's not necessary (e.g. when updating a
+ * callback).
+ */
+Dygraph.prototype.updateOptions = function(input_attrs, block_redraw) {
+ if (typeof(block_redraw) == 'undefined') block_redraw = false;
+
+ // copyUserAttrs_ drops the "file" parameter as a convenience to us.
+ var file = input_attrs.file;
+ var attrs = Dygraph.copyUserAttrs_(input_attrs);
+
+ // TODO(danvk): this is a mess. Move these options into attr_.
+ if ('rollPeriod' in attrs) {
+ this.rollPeriod_ = attrs.rollPeriod;
+ }
+ if ('dateWindow' in attrs) {
+ this.dateWindow_ = attrs.dateWindow;
+ if (!('isZoomedIgnoreProgrammaticZoom' in attrs)) {
+ this.zoomed_x_ = (attrs.dateWindow !== null);
+ }
+ }
+ if ('valueRange' in attrs && !('isZoomedIgnoreProgrammaticZoom' in attrs)) {
+ this.zoomed_y_ = (attrs.valueRange !== null);
+ }
+
+ // TODO(danvk): validate per-series options.
+ // Supported:
+ // strokeWidth
+ // pointSize
+ // drawPoints
+ // highlightCircleSize
+
+ // Check if this set options will require new points.
+ var requiresNewPoints = Dygraph.isPixelChangingOptionList(this.attr_("labels"), attrs);
+
+ Dygraph.updateDeep(this.user_attrs_, attrs);
+
+ this.attributes_.reparseSeries();
+
+ if (file) {
+ // This event indicates that the data is about to change, but hasn't yet.
+ // TODO(danvk): support cancelation of the update via this event.
+ this.cascadeEvents_('dataWillUpdate', {});
+
+ this.file_ = file;
+ if (!block_redraw) this.start_();
+ } else {
+ if (!block_redraw) {
+ if (requiresNewPoints) {
+ this.predraw_();
+ } else {
+ this.renderGraph_(false);
+ }
+ }
+ }
+};
+
+/**
+ * Make a copy of input attributes, removing file as a convenience.
+ */
+Dygraph.copyUserAttrs_ = function(attrs) {
+ var my_attrs = {};
+ for (var k in attrs) {
+ if (!attrs.hasOwnProperty(k)) continue;
+ if (k == 'file') continue;
+ if (attrs.hasOwnProperty(k)) my_attrs[k] = attrs[k];
+ }
+ return my_attrs;
+};
+
+/**
+ * Resizes the dygraph. If no parameters are specified, resizes to fill the
+ * containing div (which has presumably changed size since the dygraph was
+ * instantiated. If the width/height are specified, the div will be resized.
+ *
+ * This is far more efficient than destroying and re-instantiating a
+ * Dygraph, since it doesn't have to reparse the underlying data.
+ *
+ * @param {number} width Width (in pixels)
+ * @param {number} height Height (in pixels)
+ */
+Dygraph.prototype.resize = function(width, height) {
+ if (this.resize_lock) {
+ return;
+ }
+ this.resize_lock = true;
+
+ if ((width === null) != (height === null)) {
+ console.warn("Dygraph.resize() should be called with zero parameters or " +
+ "two non-NULL parameters. Pretending it was zero.");
+ width = height = null;
+ }
+
+ var old_width = this.width_;
+ var old_height = this.height_;
+
+ if (width) {
+ this.maindiv_.style.width = width + "px";
+ this.maindiv_.style.height = height + "px";
+ this.width_ = width;
+ this.height_ = height;
+ } else {
+ this.width_ = this.maindiv_.clientWidth;
+ this.height_ = this.maindiv_.clientHeight;
+ }
+
+ if (old_width != this.width_ || old_height != this.height_) {
+ // Resizing a canvas erases it, even when the size doesn't change, so
+ // any resize needs to be followed by a redraw.
+ this.resizeElements_();
+ this.predraw_();
+ }
+
+ this.resize_lock = false;
+};
+
+/**
+ * Adjusts the number of points in the rolling average. Updates the graph to
+ * reflect the new averaging period.
+ * @param {number} length Number of points over which to average the data.
+ */
+Dygraph.prototype.adjustRoll = function(length) {
+ this.rollPeriod_ = length;
+ this.predraw_();
+};
+
+/**
+ * Returns a boolean array of visibility statuses.
+ */
+Dygraph.prototype.visibility = function() {
+ // Do lazy-initialization, so that this happens after we know the number of
+ // data series.
+ if (!this.getOption("visibility")) {
+ this.attrs_.visibility = [];
+ }
+ // TODO(danvk): it looks like this could go into an infinite loop w/ user_attrs.
+ while (this.getOption("visibility").length < this.numColumns() - 1) {
+ this.attrs_.visibility.push(true);
+ }
+ return this.getOption("visibility");
+};
+
+/**
+ * Changes the visibility of one or more series.
+ *
+ * @param {number|number[]} num the series index or an array of series indices
+ * @param {boolean} value true or false, identifying the visibility.
+ */
+Dygraph.prototype.setVisibility = function(num, value) {
+ var x = this.visibility();
+
+ if (num.constructor !== Array) num = [num];
+
+ for (var i = 0; i < num.length; i++) {
+ if (num[i] < 0 || num[i] >= x.length) {
+ console.warn("invalid series number in setVisibility: " + num[i]);
+ } else {
+ x[num[i]] = value;
+ }
+ }
+
+ this.predraw_();
+};
+
+/**
+ * How large of an area will the dygraph render itself in?
+ * This is used for testing.
+ * @return A {width: w, height: h} object.
+ * @private
+ */
+Dygraph.prototype.size = function() {
+ return { width: this.width_, height: this.height_ };
+};
+
+/**
+ * Update the list of annotations and redraw the chart.
+ * See dygraphs.com/annotations.html for more info on how to use annotations.
+ * @param ann {Array} An array of annotation objects.
+ * @param suppressDraw {Boolean} Set to "true" to block chart redraw (optional).
+ */
+Dygraph.prototype.setAnnotations = function(ann, suppressDraw) {
+ // Only add the annotation CSS rule once we know it will be used.
+ Dygraph.addAnnotationRule();
+ this.annotations_ = ann;
+ if (!this.layout_) {
+ console.warn("Tried to setAnnotations before dygraph was ready. " +
+ "Try setting them in a ready() block. See " +
+ "dygraphs.com/tests/annotation.html");
+ return;
+ }
+
+ this.layout_.setAnnotations(this.annotations_);
+ if (!suppressDraw) {
+ this.predraw_();
+ }
+};
+
+/**
+ * Return the list of annotations.
+ */
+Dygraph.prototype.annotations = function() {
+ return this.annotations_;
+};
+
+/**
+ * Get the list of label names for this graph. The first column is the
+ * x-axis, so the data series names start at index 1.
+ *
+ * Returns null when labels have not yet been defined.
+ */
+Dygraph.prototype.getLabels = function() {
+ var labels = this.attr_("labels");
+ return labels ? labels.slice() : null;
+};
+
+/**
+ * Get the index of a series (column) given its name. The first column is the
+ * x-axis, so the data series start with index 1.
+ */
+Dygraph.prototype.indexFromSetName = function(name) {
+ return this.setIndexByName_[name];
+};
+
+/**
+ * Find the row number corresponding to the given x-value.
+ * Returns null if there is no such x-value in the data.
+ * If there are multiple rows with the same x-value, this will return the
+ * first one.
+ * @param {number} xVal The x-value to look for (e.g. millis since epoch).
+ * @return {?number} The row number, which you can pass to getValue(), or null.
+ */
+Dygraph.prototype.getRowForX = function(xVal) {
+ var low = 0,
+ high = this.numRows() - 1;
+
+ while (low <= high) {
+ var idx = (high + low) >> 1;
+ var x = this.getValue(idx, 0);
+ if (x < xVal) {
+ low = idx + 1;
+ } else if (x > xVal) {
+ high = idx - 1;
+ } else if (low != idx) { // equal, but there may be an earlier match.
+ high = idx;
+ } else {
+ return idx;
+ }
+ }
+
+ return null;
+};
+
+/**
+ * Trigger a callback when the dygraph has drawn itself and is ready to be
+ * manipulated. This is primarily useful when dygraphs has to do an XHR for the
+ * data (i.e. a URL is passed as the data source) and the chart is drawn
+ * asynchronously. If the chart has already drawn, the callback will fire
+ * immediately.
+ *
+ * This is a good place to call setAnnotation().
+ *
+ * @param {function(!Dygraph)} callback The callback to trigger when the chart
+ * is ready.
+ */
+Dygraph.prototype.ready = function(callback) {
+ if (this.is_initial_draw_) {
+ this.readyFns_.push(callback);
+ } else {
+ callback.call(this, this);
+ }
+};
+
+/**
+ * @private
+ * Adds a default style for the annotation CSS classes to the document. This is
+ * only executed when annotations are actually used. It is designed to only be
+ * called once -- all calls after the first will return immediately.
+ */
+Dygraph.addAnnotationRule = function() {
+ // TODO(danvk): move this function into plugins/annotations.js?
+ if (Dygraph.addedAnnotationCSS) return;
+
+ var rule = "border: 1px solid black; " +
+ "background-color: white; " +
+ "text-align: center;";
+
+ var styleSheetElement = document.createElement("style");
+ styleSheetElement.type = "text/css";
+ document.getElementsByTagName("head")[0].appendChild(styleSheetElement);
+
+ // Find the first style sheet that we can access.
+ // We may not add a rule to a style sheet from another domain for security
+ // reasons. This sometimes comes up when using gviz, since the Google gviz JS
+ // adds its own style sheets from google.com.
+ for (var i = 0; i < document.styleSheets.length; i++) {
+ if (document.styleSheets[i].disabled) continue;
+ var mysheet = document.styleSheets[i];
+ try {
+ if (mysheet.insertRule) { // Firefox
+ var idx = mysheet.cssRules ? mysheet.cssRules.length : 0;
+ mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx);
+ } else if (mysheet.addRule) { // IE
+ mysheet.addRule(".dygraphDefaultAnnotation", rule);
+ }
+ Dygraph.addedAnnotationCSS = true;
+ return;
+ } catch(err) {
+ // Was likely a security exception.
+ }
+ }
+
+ console.warn("Unable to add default annotation CSS rule; display may be off.");
+};
+
+return Dygraph;
+
+})();
projects / dygraphs.git / blobdiff