3 * Copyright 2006 Dan Vanderkam (danvdk@gmail.com)
4 * MIT-licensed (http://opensource.org/licenses/MIT)
8 * @fileoverview Creates an interactive, zoomable graph based on a CSV file or
9 * string. Dygraph can handle multiple series with or without error bars. The
10 * date/value ranges will be automatically set. Dygraph uses the
11 * <canvas> tag, so it only works in FF1.5+.
12 * @author danvdk@gmail.com (Dan Vanderkam)
15 <div id="graphdiv" style="width:800px; height:500px;"></div>
16 <script type="text/javascript">
17 new Dygraph(document.getElementById("graphdiv"),
18 "datafile.csv", // CSV file with headers
22 The CSV file is of the form
24 Date,SeriesA,SeriesB,SeriesC
28 If the 'errorBars' option is set in the constructor, the input should be of
30 Date,SeriesA,SeriesB,...
31 YYYYMMDD,A1,sigmaA1,B1,sigmaB1,...
32 YYYYMMDD,A2,sigmaA2,B2,sigmaB2,...
34 If the 'fractions' option is set, the input should be of the form:
36 Date,SeriesA,SeriesB,...
37 YYYYMMDD,A1/B1,A2/B2,...
38 YYYYMMDD,A1/B1,A2/B2,...
40 And error bars will be calculated automatically using a binomial distribution.
42 For further documentation and examples, see http://dygraphs.com/
46 import DygraphLayout from
'./dygraph-layout';
47 import DygraphCanvasRenderer from
'./dygraph-canvas';
48 import DygraphOptions from
'./dygraph-options';
49 import DygraphInteraction from
'./dygraph-interaction-model';
50 import * as DygraphTickers from
'./dygraph-tickers';
51 import * as utils from
'./dygraph-utils';
52 import DEFAULT_ATTRS from
'./dygraph-default-attrs';
53 import OPTIONS_REFERENCE from
'./dygraph-options-reference';
54 import IFrameTarp from
'./iframe-tarp';
56 import DefaultHandler from
'./datahandler/default';
57 import ErrorBarsHandler from
'./datahandler/bars-error';
58 import CustomBarsHandler from
'./datahandler/bars-custom';
59 import DefaultFractionHandler from
'./datahandler/default-fractions';
60 import FractionsBarsHandler from
'./datahandler/bars-fractions';
61 import BarsHandler from
'./datahandler/bars';
63 import AnnotationsPlugin from
'./plugins/annotations';
64 import AxesPlugin from
'./plugins/axes';
65 import ChartLabelsPlugin from
'./plugins/chart-labels';
66 import GridPlugin from
'./plugins/grid';
67 import LegendPlugin from
'./plugins/legend';
68 import RangeSelectorPlugin from
'./plugins/range-selector';
70 import GVizChart from
'./dygraph-gviz';
75 * Creates an interactive, zoomable chart.
78 * @param {div | String} div A div or the id of a div into which to construct
80 * @param {String | Function} file A file containing CSV data or a function
81 * that returns this data. The most basic expected format for each line is
82 * "YYYY/MM/DD,val1,val2,...". For more information, see
83 * http://dygraphs.com/data.html.
84 * @param {Object} attrs Various other attributes, e.g. errorBars determines
85 * whether the input data contains error ranges. For a complete list of
86 * options, see http://dygraphs.com/options.html.
88 var Dygraph
= function(div
, data
, opts
) {
89 this.__init__(div
, data
, opts
);
92 Dygraph
.NAME
= "Dygraph";
93 Dygraph
.VERSION
= "1.1.0";
95 // Various default values
96 Dygraph
.DEFAULT_ROLL_PERIOD
= 1;
97 Dygraph
.DEFAULT_WIDTH
= 480;
98 Dygraph
.DEFAULT_HEIGHT
= 320;
100 // For max 60 Hz. animation:
101 Dygraph
.ANIMATION_STEPS
= 12;
102 Dygraph
.ANIMATION_DURATION
= 200;
105 * Standard plotters. These may be used by clients.
106 * Available plotters are:
107 * - Dygraph.Plotters.linePlotter: draws central lines (most common)
108 * - Dygraph.Plotters.errorPlotter: draws error bars
109 * - Dygraph.Plotters.fillPlotter: draws fills under lines (used with fillGraph)
111 * By default, the plotter is [fillPlotter, errorPlotter, linePlotter].
112 * This causes all the lines to be drawn over all the fills/error bars.
114 Dygraph
.Plotters
= DygraphCanvasRenderer
._Plotters
;
117 // Used for initializing annotation CSS rules only once.
118 Dygraph
.addedAnnotationCSS
= false;
121 * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit
122 * and context <canvas> inside of it. See the constructor for details.
124 * @param {Element} div the Element to render the graph into.
125 * @param {string | Function} file Source data
126 * @param {Object} attrs Miscellaneous other options
129 Dygraph
.prototype.__init__
= function(div
, file
, attrs
) {
130 this.is_initial_draw_
= true;
133 // Support two-argument constructor
134 if (attrs
=== null || attrs
=== undefined
) { attrs
= {}; }
136 attrs
= Dygraph
.copyUserAttrs_(attrs
);
138 if (typeof(div
) == 'string') {
139 div
= document
.getElementById(div
);
143 throw new Error('Constructing dygraph with a non-existent div!');
146 // Copy the important bits into the object
147 // TODO(danvk): most of these should just stay in the attrs_ dictionary.
150 this.rollPeriod_
= attrs
.rollPeriod
|| Dygraph
.DEFAULT_ROLL_PERIOD
;
151 this.previousVerticalX_
= -1;
152 this.fractions_
= attrs
.fractions
|| false;
153 this.dateWindow_
= attrs
.dateWindow
|| null;
155 this.annotations_
= [];
157 // Zoomed indicators - These indicate when the graph has been zoomed and on what axis.
158 this.zoomed_x_
= false;
159 this.zoomed_y_
= false;
161 // Clear the div. This ensure that, if multiple dygraphs are passed the same
162 // div, then only one will be drawn.
165 // For historical reasons, the 'width' and 'height' options trump all CSS
166 // rules _except_ for an explicit 'width' or 'height' on the div.
167 // As an added convenience, if the div has zero height (like <div></div> does
168 // without any styles), then we use a default height/width
.
169 if (div
.style
.width
=== '' && attrs
.width
) {
170 div
.style
.width
= attrs
.width
+ "px";
172 if (div
.style
.height
=== '' && attrs
.height
) {
173 div
.style
.height
= attrs
.height
+ "px";
175 if (div
.style
.height
=== '' && div
.clientHeight
=== 0) {
176 div
.style
.height
= Dygraph
.DEFAULT_HEIGHT
+ "px";
177 if (div
.style
.width
=== '') {
178 div
.style
.width
= Dygraph
.DEFAULT_WIDTH
+ "px";
181 // These will be zero if the dygraph's div is hidden. In that case,
182 // use the user-specified attributes if present. If not, use zero
183 // and assume the user will call resize to fix things later.
184 this.width_
= div
.clientWidth
|| attrs
.width
|| 0;
185 this.height_
= div
.clientHeight
|| attrs
.height
|| 0;
187 // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_.
188 if (attrs
.stackedGraph
) {
189 attrs
.fillGraph
= true;
190 // TODO(nikhilk): Add any other stackedGraph checks here.
193 // DEPRECATION WARNING: All option processing should be moved from
194 // attrs_ and user_attrs_ to options_, which holds all this information.
196 // Dygraphs has many options, some of which interact with one another.
197 // To keep track of everything, we maintain two sets of options:
199 // this.user_attrs_ only options explicitly set by the user.
200 // this.attrs_ defaults, options derived from user_attrs_, data.
202 // Options are then accessed this.attr_('attr'), which first looks at
203 // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent
204 // defaults without overriding behavior that the user specifically asks for.
205 this.user_attrs_
= {};
206 utils
.update(this.user_attrs_
, attrs
);
208 // This sequence ensures that Dygraph.DEFAULT_ATTRS is never modified.
210 utils
.updateDeep(this.attrs_
, DEFAULT_ATTRS
);
212 this.boundaryIds_
= [];
213 this.setIndexByName_
= {};
214 this.datasetIndex_
= [];
216 this.registeredEvents_
= [];
217 this.eventListeners_
= {};
219 this.attributes_
= new DygraphOptions(this);
221 // Create the containing DIV and other interactive elements
222 this.createInterface_();
226 var plugins
= Dygraph
.PLUGINS
.concat(this.getOption('plugins'));
227 for (var i
= 0; i
< plugins
.length
; i
++) {
228 // the plugins option may contain either plugin classes or instances.
229 // Plugin instances contain an activate method.
230 var Plugin
= plugins
[i
]; // either a constructor or an instance.
232 if (typeof(Plugin
.activate
) !== 'undefined') {
233 pluginInstance
= Plugin
;
235 pluginInstance
= new Plugin();
239 plugin
: pluginInstance
,
245 var handlers
= pluginInstance
.activate(this);
246 for (var eventName
in handlers
) {
247 if (!handlers
.hasOwnProperty(eventName
)) continue;
248 // TODO(danvk): validate eventName.
249 pluginDict
.events
[eventName
] = handlers
[eventName
];
252 this.plugins_
.push(pluginDict
);
255 // At this point, plugins can no longer register event handlers.
256 // Construct a map from event -> ordered list of [callback, plugin].
257 for (var i
= 0; i
< this.plugins_
.length
; i
++) {
258 var plugin_dict
= this.plugins_
[i
];
259 for (var eventName
in plugin_dict
.events
) {
260 if (!plugin_dict
.events
.hasOwnProperty(eventName
)) continue;
261 var callback
= plugin_dict
.events
[eventName
];
263 var pair
= [plugin_dict
.plugin
, callback
];
264 if (!(eventName
in this.eventListeners_
)) {
265 this.eventListeners_
[eventName
] = [pair
];
267 this.eventListeners_
[eventName
].push(pair
);
272 this.createDragInterface_();
278 * Triggers a cascade of events to the various plugins which are interested in them.
279 * Returns true if the "default behavior" should be prevented, i.e. if one
280 * of the event listeners called event.preventDefault().
283 Dygraph
.prototype.cascadeEvents_
= function(name
, extra_props
) {
284 if (!(name
in this.eventListeners_
)) return false;
286 // QUESTION: can we use objects & prototypes to speed this up?
290 defaultPrevented
: false,
291 preventDefault
: function() {
292 if (!e
.cancelable
) throw "Cannot call preventDefault on non-cancelable event.";
293 e
.defaultPrevented
= true;
295 propagationStopped
: false,
296 stopPropagation
: function() {
297 e
.propagationStopped
= true;
300 utils
.update(e
, extra_props
);
302 var callback_plugin_pairs
= this.eventListeners_
[name
];
303 if (callback_plugin_pairs
) {
304 for (var i
= callback_plugin_pairs
.length
- 1; i
>= 0; i
--) {
305 var plugin
= callback_plugin_pairs
[i
][0];
306 var callback
= callback_plugin_pairs
[i
][1];
307 callback
.call(plugin
, e
);
308 if (e
.propagationStopped
) break;
311 return e
.defaultPrevented
;
315 * Fetch a plugin instance of a particular class. Only for testing.
317 * @param {!Class} type The type of the plugin.
318 * @return {Object} Instance of the plugin, or null if there is none.
320 Dygraph
.prototype.getPluginInstance_
= function(type
) {
321 for (var i
= 0; i
< this.plugins_
.length
; i
++) {
322 var p
= this.plugins_
[i
];
323 if (p
.plugin
instanceof type
) {
331 * Returns the zoomed status of the chart for one or both axes.
333 * Axis is an optional parameter. Can be set to 'x' or 'y'.
335 * The zoomed status for an axis is set whenever a user zooms using the mouse
336 * or when the dateWindow or valueRange are updated (unless the
337 * isZoomedIgnoreProgrammaticZoom option is also specified).
339 Dygraph
.prototype.isZoomed
= function(axis
) {
340 if (axis
=== null || axis
=== undefined
) {
341 return this.zoomed_x_
|| this.zoomed_y_
;
343 if (axis
=== 'x') return this.zoomed_x_
;
344 if (axis
=== 'y') return this.zoomed_y_
;
345 throw "axis parameter is [" + axis
+ "] must be null, 'x' or 'y'.";
349 * Returns information about the Dygraph object, including its containing ID.
351 Dygraph
.prototype.toString
= function() {
352 var maindiv
= this.maindiv_
;
353 var id
= (maindiv
&& maindiv
.id
) ? maindiv
.id
: maindiv
;
354 return "[Dygraph " + id
+ "]";
359 * Returns the value of an option. This may be set by the user (either in the
360 * constructor or by calling updateOptions) or by dygraphs, and may be set to a
362 * @param {string} name The name of the option, e.g. 'rollPeriod'.
363 * @param {string} [seriesName] The name of the series to which the option
364 * will be applied. If no per-series value of this option is available, then
365 * the global value is returned. This is optional.
366 * @return { ... } The value of the option.
368 Dygraph
.prototype.attr_
= function(name
, seriesName
) {
369 // For "production" code, this gets removed by uglifyjs.
370 if (process
.env
.NODE_ENV
!= 'production') {
371 if (typeof(OPTIONS_REFERENCE
) === 'undefined') {
372 console
.error('Must include options reference JS for testing');
373 } else if (!OPTIONS_REFERENCE
.hasOwnProperty(name
)) {
374 console
.error('Dygraphs is using property ' + name
+ ', which has no ' +
375 'entry in the Dygraphs.OPTIONS_REFERENCE listing.');
376 // Only log this error once.
377 OPTIONS_REFERENCE
[name
] = true;
380 return seriesName
? this.attributes_
.getForSeries(name
, seriesName
) : this.attributes_
.get(name
);
384 * Returns the current value for an option, as set in the constructor or via
385 * updateOptions. You may pass in an (optional) series name to get per-series
386 * values for the option.
388 * All values returned by this method should be considered immutable. If you
389 * modify them, there is no guarantee that the changes will be honored or that
390 * dygraphs will remain in a consistent state. If you want to modify an option,
391 * use updateOptions() instead.
393 * @param {string} name The name of the option (e.g. 'strokeWidth')
394 * @param {string=} opt_seriesName Series name to get per-series values.
395 * @return {*} The value of the option.
397 Dygraph
.prototype.getOption
= function(name
, opt_seriesName
) {
398 return this.attr_(name
, opt_seriesName
);
402 * Like getOption(), but specifically returns a number.
403 * This is a convenience function for working with the Closure Compiler.
404 * @param {string} name The name of the option (e.g. 'strokeWidth')
405 * @param {string=} opt_seriesName Series name to get per-series values.
406 * @return {number} The value of the option.
409 Dygraph
.prototype.getNumericOption
= function(name
, opt_seriesName
) {
410 return /** @type{number} */(this.getOption(name
, opt_seriesName
));
414 * Like getOption(), but specifically returns a string.
415 * This is a convenience function for working with the Closure Compiler.
416 * @param {string} name The name of the option (e.g. 'strokeWidth')
417 * @param {string=} opt_seriesName Series name to get per-series values.
418 * @return {string} The value of the option.
421 Dygraph
.prototype.getStringOption
= function(name
, opt_seriesName
) {
422 return /** @type{string} */(this.getOption(name
, opt_seriesName
));
426 * Like getOption(), but specifically returns a boolean.
427 * This is a convenience function for working with the Closure Compiler.
428 * @param {string} name The name of the option (e.g. 'strokeWidth')
429 * @param {string=} opt_seriesName Series name to get per-series values.
430 * @return {boolean} The value of the option.
433 Dygraph
.prototype.getBooleanOption
= function(name
, opt_seriesName
) {
434 return /** @type{boolean} */(this.getOption(name
, opt_seriesName
));
438 * Like getOption(), but specifically returns a function.
439 * This is a convenience function for working with the Closure Compiler.
440 * @param {string} name The name of the option (e.g. 'strokeWidth')
441 * @param {string=} opt_seriesName Series name to get per-series values.
442 * @return {function(...)} The value of the option.
445 Dygraph
.prototype.getFunctionOption
= function(name
, opt_seriesName
) {
446 return /** @type{function(...)} */(this.getOption(name
, opt_seriesName
));
449 Dygraph
.prototype.getOptionForAxis
= function(name
, axis
) {
450 return this.attributes_
.getForAxis(name
, axis
);
455 * @param {string} axis The name of the axis (i.e. 'x', 'y' or 'y2')
456 * @return { ... } A function mapping string -> option value
458 Dygraph
.prototype.optionsViewForAxis_
= function(axis
) {
460 return function(opt
) {
461 var axis_opts
= self
.user_attrs_
.axes
;
462 if (axis_opts
&& axis_opts
[axis
] && axis_opts
[axis
].hasOwnProperty(opt
)) {
463 return axis_opts
[axis
][opt
];
466 // I don't like that this is in a second spot.
467 if (axis
=== 'x' && opt
=== 'logscale') {
468 // return the default value.
469 // TODO(konigsberg): pull the default from a global default.
473 // user-specified attributes always trump defaults, even if they're less
475 if (typeof(self
.user_attrs_
[opt
]) != 'undefined') {
476 return self
.user_attrs_
[opt
];
479 axis_opts
= self
.attrs_
.axes
;
480 if (axis_opts
&& axis_opts
[axis
] && axis_opts
[axis
].hasOwnProperty(opt
)) {
481 return axis_opts
[axis
][opt
];
483 // check old-style axis options
484 // TODO(danvk): add a deprecation warning if either of these match.
485 if (axis
== 'y' && self
.axes_
[0].hasOwnProperty(opt
)) {
486 return self
.axes_
[0][opt
];
487 } else if (axis
== 'y2' && self
.axes_
[1].hasOwnProperty(opt
)) {
488 return self
.axes_
[1][opt
];
490 return self
.attr_(opt
);
495 * Returns the current rolling period, as set by the user or an option.
496 * @return {number} The number of points in the rolling window
498 Dygraph
.prototype.rollPeriod
= function() {
499 return this.rollPeriod_
;
503 * Returns the currently-visible x-range. This can be affected by zooming,
504 * panning or a call to updateOptions.
505 * Returns a two-element array: [left, right].
506 * If the Dygraph has dates on the x-axis, these will be millis since epoch.
508 Dygraph
.prototype.xAxisRange
= function() {
509 return this.dateWindow_
? this.dateWindow_
: this.xAxisExtremes();
513 * Returns the lower- and upper-bound x-axis values of the
516 Dygraph
.prototype.xAxisExtremes
= function() {
517 var pad
= this.getNumericOption('xRangePad') / this.plotter_
.area
.w
;
518 if (this.numRows() === 0) {
519 return [0 - pad
, 1 + pad
];
521 var left
= this.rawData_
[0][0];
522 var right
= this.rawData_
[this.rawData_
.length
- 1][0];
524 // Must keep this in sync with dygraph-layout _evaluateLimits()
525 var range
= right
- left
;
527 right
+= range
* pad
;
529 return [left
, right
];
533 * Returns the currently-visible y-range for an axis. This can be affected by
534 * zooming, panning or a call to updateOptions. Axis indices are zero-based. If
535 * called with no arguments, returns the range of the first axis.
536 * Returns a two-element array: [bottom, top].
538 Dygraph
.prototype.yAxisRange
= function(idx
) {
539 if (typeof(idx
) == "undefined") idx
= 0;
540 if (idx
< 0 || idx
>= this.axes_
.length
) {
543 var axis
= this.axes_
[idx
];
544 return [ axis
.computedValueRange
[0], axis
.computedValueRange
[1] ];
548 * Returns the currently-visible y-ranges for each axis. This can be affected by
549 * zooming, panning, calls to updateOptions, etc.
550 * Returns an array of [bottom, top] pairs, one for each y-axis.
552 Dygraph
.prototype.yAxisRanges
= function() {
554 for (var i
= 0; i
< this.axes_
.length
; i
++) {
555 ret
.push(this.yAxisRange(i
));
560 // TODO(danvk): use these functions throughout dygraphs.
562 * Convert from data coordinates to canvas/div X/Y coordinates.
563 * If specified, do this conversion for the coordinate system of a particular
564 * axis. Uses the first axis by default.
565 * Returns a two-element array: [X, Y]
567 * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord
568 * instead of toDomCoords(null, y, axis).
570 Dygraph
.prototype.toDomCoords
= function(x
, y
, axis
) {
571 return [ this.toDomXCoord(x
), this.toDomYCoord(y
, axis
) ];
575 * Convert from data x coordinates to canvas/div X coordinate.
576 * If specified, do this conversion for the coordinate system of a particular
578 * Returns a single value or null if x is null.
580 Dygraph
.prototype.toDomXCoord
= function(x
) {
585 var area
= this.plotter_
.area
;
586 var xRange
= this.xAxisRange();
587 return area
.x
+ (x
- xRange
[0]) / (xRange
[1] - xRange
[0]) * area
.w
;
591 * Convert from data x coordinates to canvas/div Y coordinate and optional
592 * axis. Uses the first axis by default.
594 * returns a single value or null if y is null.
596 Dygraph
.prototype.toDomYCoord
= function(y
, axis
) {
597 var pct
= this.toPercentYCoord(y
, axis
);
602 var area
= this.plotter_
.area
;
603 return area
.y
+ pct
* area
.h
;
607 * Convert from canvas/div coords to data coordinates.
608 * If specified, do this conversion for the coordinate system of a particular
609 * axis. Uses the first axis by default.
610 * Returns a two-element array: [X, Y].
612 * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord
613 * instead of toDataCoords(null, y, axis).
615 Dygraph
.prototype.toDataCoords
= function(x
, y
, axis
) {
616 return [ this.toDataXCoord(x
), this.toDataYCoord(y
, axis
) ];
620 * Convert from canvas/div x coordinate to data coordinate.
622 * If x is null, this returns null.
624 Dygraph
.prototype.toDataXCoord
= function(x
) {
629 var area
= this.plotter_
.area
;
630 var xRange
= this.xAxisRange();
632 if (!this.attributes_
.getForAxis("logscale", 'x')) {
633 return xRange
[0] + (x
- area
.x
) / area
.w
* (xRange
[1] - xRange
[0]);
635 // TODO: remove duplicate code?
636 // Computing the inverse of toDomCoord.
637 var pct
= (x
- area
.x
) / area
.w
;
639 // Computing the inverse of toPercentXCoord. The function was arrived at with
640 // the following steps:
642 // Original calcuation:
643 // pct = (log(x) - log(xRange[0])) / (log(xRange
[1]) - log(xRange
[0])));
645 // Multiply both sides by the right-side demoninator.
646 // pct * (log(xRange[1] - log(xRange[0]))) = log(x) - log(xRange[0])
648 // add log(xRange[0]) to both sides
649 // log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0])) = log(x);
651 // Swap both sides of the equation,
652 // log(x) = log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0]))
654 // Use both sides as the exponent in 10^exp and we're done.
655 // x = 10 ^ (log(xRange[0]) + (pct * (log(xRange[1]) - log(xRange[0])))
656 var logr0
= utils
.log10(xRange
[0]);
657 var logr1
= utils
.log10(xRange
[1]);
658 var exponent
= logr0
+ (pct
* (logr1
- logr0
));
659 var value
= Math
.pow(utils
.LOG_SCALE
, exponent
);
665 * Convert from canvas/div y coord to value.
667 * If y is null, this returns null.
668 * if axis is null, this uses the first axis.
670 Dygraph
.prototype.toDataYCoord
= function(y
, axis
) {
675 var area
= this.plotter_
.area
;
676 var yRange
= this.yAxisRange(axis
);
678 if (typeof(axis
) == "undefined") axis
= 0;
679 if (!this.attributes_
.getForAxis("logscale", axis
)) {
680 return yRange
[0] + (area
.y
+ area
.h
- y
) / area
.h
* (yRange
[1] - yRange
[0]);
682 // Computing the inverse of toDomCoord.
683 var pct
= (y
- area
.y
) / area
.h
;
685 // Computing the inverse of toPercentYCoord. The function was arrived at with
686 // the following steps:
688 // Original calcuation:
689 // pct = (log(yRange[1]) - log(y)) / (log(yRange
[1]) - log(yRange
[0]));
691 // Multiply both sides by the right-side demoninator.
692 // pct * (log(yRange[1]) - log(yRange[0])) = log(yRange[1]) - log(y);
694 // subtract log(yRange[1]) from both sides.
695 // (pct * (log(yRange[1]) - log(yRange[0]))) - log(yRange[1]) = -log(y);
697 // and multiply both sides by -1.
698 // log(yRange[1]) - (pct * (logr1 - log(yRange[0])) = log(y);
700 // Swap both sides of the equation,
701 // log(y) = log(yRange[1]) - (pct * (log(yRange[1]) - log(yRange[0])));
703 // Use both sides as the exponent in 10^exp and we're done.
704 // y = 10 ^ (log(yRange[1]) - (pct * (log(yRange[1]) - log(yRange[0]))));
705 var logr0
= utils
.log10(yRange
[0]);
706 var logr1
= utils
.log10(yRange
[1]);
707 var exponent
= logr1
- (pct
* (logr1
- logr0
));
708 var value
= Math
.pow(utils
.LOG_SCALE
, exponent
);
714 * Converts a y for an axis to a percentage from the top to the
715 * bottom of the drawing area.
717 * If the coordinate represents a value visible on the canvas, then
718 * the value will be between 0 and 1, where 0 is the top of the canvas.
719 * However, this method will return values outside the range, as
720 * values can fall outside the canvas.
722 * If y is null, this returns null.
723 * if axis is null, this uses the first axis.
725 * @param {number} y The data y-coordinate.
726 * @param {number} [axis] The axis number on which the data coordinate lives.
727 * @return {number} A fraction in [0, 1] where 0 = the top edge.
729 Dygraph
.prototype.toPercentYCoord
= function(y
, axis
) {
733 if (typeof(axis
) == "undefined") axis
= 0;
735 var yRange
= this.yAxisRange(axis
);
738 var logscale
= this.attributes_
.getForAxis("logscale", axis
);
740 var logr0
= utils
.log10(yRange
[0]);
741 var logr1
= utils
.log10(yRange
[1]);
742 pct
= (logr1
- utils
.log10(y
)) / (logr1
- logr0
);
744 // yRange[1] - y is unit distance from the bottom.
745 // yRange[1] - yRange[0] is the scale of the range.
746 // (yRange[1] - y) / (yRange
[1] - yRange
[0]) is the
% from the bottom
.
747 pct
= (yRange
[1] - y
) / (yRange
[1] - yRange
[0]);
753 * Converts an x value to a percentage from the left to the right of
756 * If the coordinate represents a value visible on the canvas, then
757 * the value will be between 0 and 1, where 0 is the left of the canvas.
758 * However, this method will return values outside the range, as
759 * values can fall outside the canvas.
761 * If x is null, this returns null.
762 * @param {number} x The data x-coordinate.
763 * @return {number} A fraction in [0, 1] where 0 = the left edge.
765 Dygraph
.prototype.toPercentXCoord
= function(x
) {
770 var xRange
= this.xAxisRange();
772 var logscale
= this.attributes_
.getForAxis("logscale", 'x') ;
773 if (logscale
=== true) { // logscale can be null so we test for true explicitly.
774 var logr0
= utils
.log10(xRange
[0]);
775 var logr1
= utils
.log10(xRange
[1]);
776 pct
= (utils
.log10(x
) - logr0
) / (logr1
- logr0
);
778 // x - xRange[0] is unit distance from the left.
779 // xRange[1] - xRange[0] is the scale of the range.
780 // The full expression below is the % from the left.
781 pct
= (x
- xRange
[0]) / (xRange
[1] - xRange
[0]);
787 * Returns the number of columns (including the independent variable).
788 * @return {number} The number of columns.
790 Dygraph
.prototype.numColumns
= function() {
791 if (!this.rawData_
) return 0;
792 return this.rawData_
[0] ? this.rawData_
[0].length
: this.attr_("labels").length
;
796 * Returns the number of rows (excluding any header/label row).
797 * @return {number} The number of rows, less any header.
799 Dygraph
.prototype.numRows
= function() {
800 if (!this.rawData_
) return 0;
801 return this.rawData_
.length
;
805 * Returns the value in the given row and column. If the row and column exceed
806 * the bounds on the data, returns null. Also returns null if the value is
808 * @param {number} row The row number of the data (0-based). Row 0 is the
809 * first row of data, not a header row.
810 * @param {number} col The column number of the data (0-based)
811 * @return {number} The value in the specified cell or null if the row/col
814 Dygraph
.prototype.getValue
= function(row
, col
) {
815 if (row
< 0 || row
> this.rawData_
.length
) return null;
816 if (col
< 0 || col
> this.rawData_
[row
].length
) return null;
818 return this.rawData_
[row
][col
];
822 * Generates interface elements for the Dygraph: a containing div, a div to
823 * display the current point, and a textbox to adjust the rolling average
824 * period. Also creates the Renderer/Layout elements.
827 Dygraph
.prototype.createInterface_
= function() {
828 // Create the all-enclosing graph div
829 var enclosing
= this.maindiv_
;
831 this.graphDiv
= document
.createElement("div");
833 // TODO(danvk): any other styles that are useful to set here?
834 this.graphDiv
.style
.textAlign
= 'left'; // This is a CSS "reset"
835 this.graphDiv
.style
.position
= 'relative';
836 enclosing
.appendChild(this.graphDiv
);
838 // Create the canvas for interactive parts of the chart.
839 this.canvas_
= utils
.createCanvas();
840 this.canvas_
.style
.position
= "absolute";
842 // ... and for static parts of the chart.
843 this.hidden_
= this.createPlotKitCanvas_(this.canvas_
);
845 this.canvas_ctx_
= utils
.getContext(this.canvas_
);
846 this.hidden_ctx_
= utils
.getContext(this.hidden_
);
848 this.resizeElements_();
850 // The interactive parts of the graph are drawn on top of the chart.
851 this.graphDiv
.appendChild(this.hidden_
);
852 this.graphDiv
.appendChild(this.canvas_
);
853 this.mouseEventElement_
= this.createMouseEventElement_();
855 // Create the grapher
856 this.layout_
= new DygraphLayout(this);
860 this.mouseMoveHandler_
= function(e
) {
861 dygraph
.mouseMove_(e
);
864 this.mouseOutHandler_
= function(e
) {
865 // The mouse has left the chart if:
866 // 1. e.target is inside the chart
867 // 2. e.relatedTarget is outside the chart
868 var target
= e
.target
|| e
.fromElement
;
869 var relatedTarget
= e
.relatedTarget
|| e
.toElement
;
870 if (utils
.isNodeContainedBy(target
, dygraph
.graphDiv
) &&
871 !utils
.isNodeContainedBy(relatedTarget
, dygraph
.graphDiv
)) {
872 dygraph
.mouseOut_(e
);
876 this.addAndTrackEvent(window
, 'mouseout', this.mouseOutHandler_
);
877 this.addAndTrackEvent(this.mouseEventElement_
, 'mousemove', this.mouseMoveHandler_
);
879 // Don't recreate and register the resize handler on subsequent calls.
880 // This happens when the graph is resized.
881 if (!this.resizeHandler_
) {
882 this.resizeHandler_
= function(e
) {
886 // Update when the window is resized.
887 // TODO(danvk): drop frames depending on complexity of the chart.
888 this.addAndTrackEvent(window
, 'resize', this.resizeHandler_
);
892 Dygraph
.prototype.resizeElements_
= function() {
893 this.graphDiv
.style
.width
= this.width_
+ "px";
894 this.graphDiv
.style
.height
= this.height_
+ "px";
896 var canvasScale
= utils
.getContextPixelRatio(this.canvas_ctx_
);
897 this.canvas_
.width
= this.width_
* canvasScale
;
898 this.canvas_
.height
= this.height_
* canvasScale
;
899 this.canvas_
.style
.width
= this.width_
+ "px"; // for IE
900 this.canvas_
.style
.height
= this.height_
+ "px"; // for IE
901 if (canvasScale
!== 1) {
902 this.canvas_ctx_
.scale(canvasScale
, canvasScale
);
905 var hiddenScale
= utils
.getContextPixelRatio(this.hidden_ctx_
);
906 this.hidden_
.width
= this.width_
* hiddenScale
;
907 this.hidden_
.height
= this.height_
* hiddenScale
;
908 this.hidden_
.style
.width
= this.width_
+ "px"; // for IE
909 this.hidden_
.style
.height
= this.height_
+ "px"; // for IE
910 if (hiddenScale
!== 1) {
911 this.hidden_ctx_
.scale(hiddenScale
, hiddenScale
);
916 * Detach DOM elements in the dygraph and null out all data references.
917 * Calling this when you're done with a dygraph can dramatically reduce memory
918 * usage. See, e.g., the tests/perf.html example.
920 Dygraph
.prototype.destroy
= function() {
921 this.canvas_ctx_
.restore();
922 this.hidden_ctx_
.restore();
924 // Destroy any plugins, in the reverse order that they were registered.
925 for (var i
= this.plugins_
.length
- 1; i
>= 0; i
--) {
926 var p
= this.plugins_
.pop();
927 if (p
.plugin
.destroy
) p
.plugin
.destroy();
930 var removeRecursive
= function(node
) {
931 while (node
.hasChildNodes()) {
932 removeRecursive(node
.firstChild
);
933 node
.removeChild(node
.firstChild
);
937 this.removeTrackedEvents_();
939 // remove mouse event handlers (This may not be necessary anymore)
940 utils
.removeEvent(window
, 'mouseout', this.mouseOutHandler_
);
941 utils
.removeEvent(this.mouseEventElement_
, 'mousemove', this.mouseMoveHandler_
);
943 // remove window handlers
944 utils
.removeEvent(window
,'resize', this.resizeHandler_
);
945 this.resizeHandler_
= null;
947 removeRecursive(this.maindiv_
);
949 var nullOut
= function(obj
) {
951 if (typeof(obj
[n
]) === 'object') {
956 // These may not all be necessary, but it can't hurt...
957 nullOut(this.layout_
);
958 nullOut(this.plotter_
);
963 * Creates the canvas on which the chart will be drawn. Only the Renderer ever
964 * draws on this particular canvas. All Dygraph work (i.e. drawing hover dots
965 * or the zoom rectangles) is done on this.canvas_.
966 * @param {Object} canvas The Dygraph canvas over which to overlay the plot
967 * @return {Object} The newly-created canvas
970 Dygraph
.prototype.createPlotKitCanvas_
= function(canvas
) {
971 var h
= utils
.createCanvas();
972 h
.style
.position
= "absolute";
973 // TODO(danvk): h should be offset from canvas. canvas needs to include
974 // some extra area to make it easier to zoom in on the far left and far
975 // right. h needs to be precisely the plot area, so that clipping occurs.
976 h
.style
.top
= canvas
.style
.top
;
977 h
.style
.left
= canvas
.style
.left
;
978 h
.width
= this.width_
;
979 h
.height
= this.height_
;
980 h
.style
.width
= this.width_
+ "px"; // for IE
981 h
.style
.height
= this.height_
+ "px"; // for IE
986 * Creates an overlay element used to handle mouse events.
987 * @return {Object} The mouse event element.
990 Dygraph
.prototype.createMouseEventElement_
= function() {
995 * Generate a set of distinct colors for the data series. This is done with a
996 * color wheel. Saturation/Value are customizable, and the hue is
997 * equally-spaced around the color wheel. If a custom set of colors is
998 * specified, that is used instead.
1001 Dygraph
.prototype.setColors_
= function() {
1002 var labels
= this.getLabels();
1003 var num
= labels
.length
- 1;
1005 this.colorsMap_
= {};
1007 // These are used for when no custom colors are specified.
1008 var sat
= this.getNumericOption('colorSaturation') || 1.0;
1009 var val
= this.getNumericOption('colorValue') || 0.5;
1010 var half
= Math
.ceil(num
/ 2);
1012 var colors
= this.getOption('colors');
1013 var visibility
= this.visibility();
1014 for (var i
= 0; i
< num
; i
++) {
1015 if (!visibility
[i
]) {
1018 var label
= labels
[i
+ 1];
1019 var colorStr
= this.attributes_
.getForSeries('color', label
);
1022 colorStr
= colors
[i
% colors
.length
];
1024 // alternate colors for high contrast.
1025 var idx
= i
% 2 ? (half
+ (i
+ 1)/ 2) : Math.ceil((i + 1) / 2);
1026 var hue
= (1.0 * idx
/ (1 + num
));
1027 colorStr
= utils
.hsvToRGB(hue
, sat
, val
);
1030 this.colors_
.push(colorStr
);
1031 this.colorsMap_
[label
] = colorStr
;
1036 * Return the list of colors. This is either the list of colors passed in the
1037 * attributes or the autogenerated list of rgb(r,g,b) strings.
1038 * This does not return colors for invisible series.
1039 * @return {Array.<string>} The list of colors.
1041 Dygraph
.prototype.getColors
= function() {
1042 return this.colors_
;
1046 * Returns a few attributes of a series, i.e. its color, its visibility, which
1047 * axis it's assigned to, and its column in the original data.
1048 * Returns null if the series does not exist.
1049 * Otherwise, returns an object with column, visibility, color and axis properties.
1050 * The "axis" property will be set to 1 for y1 and 2 for y2.
1051 * The "column" property can be fed back into getValue(row, column) to get
1052 * values for this series.
1054 Dygraph
.prototype.getPropertiesForSeries
= function(series_name
) {
1056 var labels
= this.getLabels();
1057 for (var i
= 1; i
< labels
.length
; i
++) {
1058 if (labels
[i
] == series_name
) {
1063 if (idx
== -1) return null;
1068 visible
: this.visibility()[idx
- 1],
1069 color
: this.colorsMap_
[series_name
],
1070 axis
: 1 + this.attributes_
.axisForSeries(series_name
)
1075 * Create the text box to adjust the averaging period
1078 Dygraph
.prototype.createRollInterface_
= function() {
1079 // Create a roller if one doesn't exist already.
1080 if (!this.roller_
) {
1081 this.roller_
= document
.createElement("input");
1082 this.roller_
.type
= "text";
1083 this.roller_
.style
.display
= "none";
1084 this.graphDiv
.appendChild(this.roller_
);
1087 var display
= this.getBooleanOption('showRoller') ? 'block' : 'none';
1089 var area
= this.plotter_
.area
;
1090 var textAttr
= { "position": "absolute",
1092 "top": (area
.y
+ area
.h
- 25) + "px",
1093 "left": (area
.x
+ 1) + "px",
1096 this.roller_
.size
= "2";
1097 this.roller_
.value
= this.rollPeriod_
;
1098 for (var name
in textAttr
) {
1099 if (textAttr
.hasOwnProperty(name
)) {
1100 this.roller_
.style
[name
] = textAttr
[name
];
1105 this.roller_
.onchange
= function() { dygraph
.adjustRoll(dygraph
.roller_
.value
); };
1109 * Set up all the mouse handlers needed to capture dragging behavior for zoom
1113 Dygraph
.prototype.createDragInterface_
= function() {
1115 // Tracks whether the mouse is down right now
1117 isPanning
: false, // is this drag part of a pan?
1118 is2DPan
: false, // if so, is that pan 1- or 2-dimensional?
1119 dragStartX
: null, // pixel coordinates
1120 dragStartY
: null, // pixel coordinates
1121 dragEndX
: null, // pixel coordinates
1122 dragEndY
: null, // pixel coordinates
1123 dragDirection
: null,
1124 prevEndX
: null, // pixel coordinates
1125 prevEndY
: null, // pixel coordinates
1126 prevDragDirection
: null,
1127 cancelNextDblclick
: false, // see comment in dygraph-interaction-model.js
1129 // The value on the left side of the graph when a pan operation starts.
1130 initialLeftmostDate
: null,
1132 // The number of units each pixel spans. (This won't be valid for log
1134 xUnitsPerPixel
: null,
1136 // TODO(danvk): update this comment
1137 // The range in second/value units that the viewport encompasses during a
1138 // panning operation.
1141 // Top-left corner of the canvas, in DOM coords
1142 // TODO(konigsberg): Rename topLeftCanvasX, topLeftCanvasY.
1146 // Values for use with panEdgeFraction, which limit how far outside the
1147 // graph's data boundaries it can be panned.
1148 boundedDates
: null, // [minDate, maxDate]
1149 boundedValues
: null, // [[minValue, maxValue] ...]
1151 // We cover iframes during mouse interactions. See comments in
1152 // dygraph-utils.js for more info on why this is a good idea.
1153 tarp
: new IFrameTarp(),
1155 // contextB is the same thing as this context object but renamed.
1156 initializeMouseDown
: function(event
, g
, contextB
) {
1157 // prevents mouse drags from selecting page text.
1158 if (event
.preventDefault
) {
1159 event
.preventDefault(); // Firefox, Chrome, etc.
1161 event
.returnValue
= false; // IE
1162 event
.cancelBubble
= true;
1165 var canvasPos
= utils
.findPos(g
.canvas_
);
1166 contextB
.px
= canvasPos
.x
;
1167 contextB
.py
= canvasPos
.y
;
1168 contextB
.dragStartX
= utils
.dragGetX_(event
, contextB
);
1169 contextB
.dragStartY
= utils
.dragGetY_(event
, contextB
);
1170 contextB
.cancelNextDblclick
= false;
1171 contextB
.tarp
.cover();
1173 destroy
: function() {
1175 if (context
.isZooming
|| context
.isPanning
) {
1176 context
.isZooming
= false;
1177 context
.dragStartX
= null;
1178 context
.dragStartY
= null;
1181 if (context
.isPanning
) {
1182 context
.isPanning
= false;
1183 context
.draggingDate
= null;
1184 context
.dateRange
= null;
1185 for (var i
= 0; i
< self
.axes_
.length
; i
++) {
1186 delete self
.axes_
[i
].draggingValue
;
1187 delete self
.axes_
[i
].dragValueRange
;
1191 context
.tarp
.uncover();
1195 var interactionModel
= this.getOption("interactionModel");
1197 // Self is the graph.
1200 // Function that binds the graph and context to the handler.
1201 var bindHandler
= function(handler
) {
1202 return function(event
) {
1203 handler(event
, self
, context
);
1207 for (var eventName
in interactionModel
) {
1208 if (!interactionModel
.hasOwnProperty(eventName
)) continue;
1209 this.addAndTrackEvent(this.mouseEventElement_
, eventName
,
1210 bindHandler(interactionModel
[eventName
]));
1213 // If the user releases the mouse button during a drag, but not over the
1214 // canvas, then it doesn't count as a zooming action.
1215 if (!interactionModel
.willDestroyContextMyself
) {
1216 var mouseUpHandler
= function(event
) {
1220 this.addAndTrackEvent(document
, 'mouseup', mouseUpHandler
);
1225 * Draw a gray zoom rectangle over the desired area of the canvas. Also clears
1226 * up any previous zoom rectangles that were drawn. This could be optimized to
1227 * avoid extra redrawing, but it's tricky to avoid interactions with the status
1230 * @param {number} direction the direction of the zoom rectangle. Acceptable
1231 * values are utils.HORIZONTAL and utils.VERTICAL.
1232 * @param {number} startX The X position where the drag started, in canvas
1234 * @param {number} endX The current X position of the drag, in canvas coords.
1235 * @param {number} startY The Y position where the drag started, in canvas
1237 * @param {number} endY The current Y position of the drag, in canvas coords.
1238 * @param {number} prevDirection the value of direction on the previous call to
1239 * this function. Used to avoid excess redrawing
1240 * @param {number} prevEndX The value of endX on the previous call to this
1241 * function. Used to avoid excess redrawing
1242 * @param {number} prevEndY The value of endY on the previous call to this
1243 * function. Used to avoid excess redrawing
1246 Dygraph
.prototype.drawZoomRect_
= function(direction
, startX
, endX
, startY
,
1247 endY
, prevDirection
, prevEndX
,
1249 var ctx
= this.canvas_ctx_
;
1251 // Clean up from the previous rect if necessary
1252 if (prevDirection
== utils
.HORIZONTAL
) {
1253 ctx
.clearRect(Math
.min(startX
, prevEndX
), this.layout_
.getPlotArea().y
,
1254 Math
.abs(startX
- prevEndX
), this.layout_
.getPlotArea().h
);
1255 } else if (prevDirection
== utils
.VERTICAL
) {
1256 ctx
.clearRect(this.layout_
.getPlotArea().x
, Math
.min(startY
, prevEndY
),
1257 this.layout_
.getPlotArea().w
, Math
.abs(startY
- prevEndY
));
1260 // Draw a light-grey rectangle to show the new viewing area
1261 if (direction
== utils
.HORIZONTAL
) {
1262 if (endX
&& startX
) {
1263 ctx
.fillStyle
= "rgba(128,128,128,0.33)";
1264 ctx
.fillRect(Math
.min(startX
, endX
), this.layout_
.getPlotArea().y
,
1265 Math
.abs(endX
- startX
), this.layout_
.getPlotArea().h
);
1267 } else if (direction
== utils
.VERTICAL
) {
1268 if (endY
&& startY
) {
1269 ctx
.fillStyle
= "rgba(128,128,128,0.33)";
1270 ctx
.fillRect(this.layout_
.getPlotArea().x
, Math
.min(startY
, endY
),
1271 this.layout_
.getPlotArea().w
, Math
.abs(endY
- startY
));
1277 * Clear the zoom rectangle (and perform no zoom).
1280 Dygraph
.prototype.clearZoomRect_
= function() {
1281 this.currentZoomRectArgs_
= null;
1282 this.canvas_ctx_
.clearRect(0, 0, this.width_
, this.height_
);
1286 * Zoom to something containing [lowX, highX]. These are pixel coordinates in
1287 * the canvas. The exact zoom window may be slightly larger if there are no data
1288 * points near lowX or highX. Don't confuse this function with doZoomXDates,
1289 * which accepts dates that match the raw data. This function redraws the graph.
1291 * @param {number} lowX The leftmost pixel value that should be visible.
1292 * @param {number} highX The rightmost pixel value that should be visible.
1295 Dygraph
.prototype.doZoomX_
= function(lowX
, highX
) {
1296 this.currentZoomRectArgs_
= null;
1297 // Find the earliest and latest dates contained in this canvasx range.
1298 // Convert the call to date ranges of the raw data.
1299 var minDate
= this.toDataXCoord(lowX
);
1300 var maxDate
= this.toDataXCoord(highX
);
1301 this.doZoomXDates_(minDate
, maxDate
);
1305 * Zoom to something containing [minDate, maxDate] values. Don't confuse this
1306 * method with doZoomX which accepts pixel coordinates. This function redraws
1309 * @param {number} minDate The minimum date that should be visible.
1310 * @param {number} maxDate The maximum date that should be visible.
1313 Dygraph
.prototype.doZoomXDates_
= function(minDate
, maxDate
) {
1314 // TODO(danvk): when xAxisRange is null (i.e. "fit to data", the animation
1315 // can produce strange effects. Rather than the x-axis transitioning slowly
1316 // between values, it can jerk around.)
1317 var old_window
= this.xAxisRange();
1318 var new_window
= [minDate
, maxDate
];
1319 this.zoomed_x_
= true;
1321 this.doAnimatedZoom(old_window
, new_window
, null, null, function() {
1322 if (that
.getFunctionOption("zoomCallback")) {
1323 that
.getFunctionOption("zoomCallback").call(that
,
1324 minDate
, maxDate
, that
.yAxisRanges());
1330 * Zoom to something containing [lowY, highY]. These are pixel coordinates in
1331 * the canvas. This function redraws the graph.
1333 * @param {number} lowY The topmost pixel value that should be visible.
1334 * @param {number} highY The lowest pixel value that should be visible.
1337 Dygraph
.prototype.doZoomY_
= function(lowY
, highY
) {
1338 this.currentZoomRectArgs_
= null;
1339 // Find the highest and lowest values in pixel range for each axis.
1340 // Note that lowY (in pixels) corresponds to the max Value (in data coords).
1341 // This is because pixels increase as you go down on the screen, whereas data
1342 // coordinates increase as you go up the screen.
1343 var oldValueRanges
= this.yAxisRanges();
1344 var newValueRanges
= [];
1345 for (var i
= 0; i
< this.axes_
.length
; i
++) {
1346 var hi
= this.toDataYCoord(lowY
, i
);
1347 var low
= this.toDataYCoord(highY
, i
);
1348 newValueRanges
.push([low
, hi
]);
1351 this.zoomed_y_
= true;
1353 this.doAnimatedZoom(null, null, oldValueRanges
, newValueRanges
, function() {
1354 if (that
.getFunctionOption("zoomCallback")) {
1355 var xRange
= that
.xAxisRange();
1356 that
.getFunctionOption("zoomCallback").call(that
,
1357 xRange
[0], xRange
[1], that
.yAxisRanges());
1363 * Transition function to use in animations. Returns values between 0.0
1364 * (totally old values) and 1.0 (totally new values) for each frame.
1367 Dygraph
.zoomAnimationFunction
= function(frame
, numFrames
) {
1369 return (1.0 - Math
.pow(k
, -frame
)) / (1.0 - Math
.pow(k
, -numFrames
));
1373 * Reset the zoom to the original view coordinates. This is the same as
1374 * double-clicking on the graph.
1376 Dygraph
.prototype.resetZoom
= function() {
1377 var dirty
= false, dirtyX
= false, dirtyY
= false;
1378 if (this.dateWindow_
!== null) {
1383 for (var i
= 0; i
< this.axes_
.length
; i
++) {
1384 if (typeof(this.axes_
[i
].valueWindow
) !== 'undefined' && this.axes_
[i
].valueWindow
!== null) {
1390 // Clear any selection, since it's likely to be drawn in the wrong place.
1391 this.clearSelection();
1394 this.zoomed_x_
= false;
1395 this.zoomed_y_
= false;
1397 //calculate extremes to avoid lack of padding on reset.
1398 var extremes
= this.xAxisExtremes();
1399 var minDate
= extremes
[0],
1400 maxDate
= extremes
[1];
1402 // TODO(danvk): merge this block w/ the code below
.
1403 if (!this.getBooleanOption("animatedZooms")) {
1404 this.dateWindow_
= null;
1405 for (i
= 0; i
< this.axes_
.length
; i
++) {
1406 if (this.axes_
[i
].valueWindow
!== null) {
1407 delete this.axes_
[i
].valueWindow
;
1411 if (this.getFunctionOption("zoomCallback")) {
1412 this.getFunctionOption("zoomCallback").call(this,
1413 minDate
, maxDate
, this.yAxisRanges());
1418 var oldWindow
=null, newWindow
=null, oldValueRanges
=null, newValueRanges
=null;
1420 oldWindow
= this.xAxisRange();
1421 newWindow
= [minDate
, maxDate
];
1425 oldValueRanges
= this.yAxisRanges();
1426 // TODO(danvk): this is pretty inefficient
1427 var packed
= this.gatherDatasets_(this.rolledSeries_
, null);
1428 var extremes
= packed
.extremes
;
1430 // this has the side-effect of modifying this.axes_.
1431 // this doesn't make much sense in this context, but it's convenient (we
1432 // need this.axes_[*].extremeValues) and not harmful since we'll be
1433 // calling drawGraph_ shortly, which clobbers these values.
1434 this.computeYAxisRanges_(extremes
);
1436 newValueRanges
= [];
1437 for (i
= 0; i
< this.axes_
.length
; i
++) {
1438 var axis
= this.axes_
[i
];
1439 newValueRanges
.push((axis
.valueRange
!== null &&
1440 axis
.valueRange
!== undefined
) ?
1441 axis
.valueRange
: axis
.extremeRange
);
1446 this.doAnimatedZoom(oldWindow
, newWindow
, oldValueRanges
, newValueRanges
,
1448 that
.dateWindow_
= null;
1449 for (var i
= 0; i
< that
.axes_
.length
; i
++) {
1450 if (that
.axes_
[i
].valueWindow
!== null) {
1451 delete that
.axes_
[i
].valueWindow
;
1454 if (that
.getFunctionOption("zoomCallback")) {
1455 that
.getFunctionOption("zoomCallback").call(that
,
1456 minDate
, maxDate
, that
.yAxisRanges());
1463 * Combined animation logic for all zoom functions.
1464 * either the x parameters or y parameters may be null.
1467 Dygraph
.prototype.doAnimatedZoom
= function(oldXRange
, newXRange
, oldYRanges
, newYRanges
, callback
) {
1468 var steps
= this.getBooleanOption("animatedZooms") ?
1469 Dygraph
.ANIMATION_STEPS
: 1;
1472 var valueRanges
= [];
1475 if (oldXRange
!== null && newXRange
!== null) {
1476 for (step
= 1; step
<= steps
; step
++) {
1477 frac
= Dygraph
.zoomAnimationFunction(step
, steps
);
1478 windows
[step
-1] = [oldXRange
[0]*(1-frac
) + frac
*newXRange
[0],
1479 oldXRange
[1]*(1-frac
) + frac
*newXRange
[1]];
1483 if (oldYRanges
!== null && newYRanges
!== null) {
1484 for (step
= 1; step
<= steps
; step
++) {
1485 frac
= Dygraph
.zoomAnimationFunction(step
, steps
);
1487 for (var j
= 0; j
< this.axes_
.length
; j
++) {
1488 thisRange
.push([oldYRanges
[j
][0]*(1-frac
) + frac
*newYRanges
[j
][0],
1489 oldYRanges
[j
][1]*(1-frac
) + frac
*newYRanges
[j
][1]]);
1491 valueRanges
[step
-1] = thisRange
;
1496 utils
.repeatAndCleanup(function(step
) {
1497 if (valueRanges
.length
) {
1498 for (var i
= 0; i
< that
.axes_
.length
; i
++) {
1499 var w
= valueRanges
[step
][i
];
1500 that
.axes_
[i
].valueWindow
= [w
[0], w
[1]];
1503 if (windows
.length
) {
1504 that
.dateWindow_
= windows
[step
];
1507 }, steps
, Dygraph
.ANIMATION_DURATION
/ steps
, callback
);
1511 * Get the current graph's area object.
1513 * Returns: {x, y, w, h}
1515 Dygraph
.prototype.getArea
= function() {
1516 return this.plotter_
.area
;
1520 * Convert a mouse event to DOM coordinates relative to the graph origin.
1522 * Returns a two-element array: [X, Y].
1524 Dygraph
.prototype.eventToDomCoords
= function(event
) {
1525 if (event
.offsetX
&& event
.offsetY
) {
1526 return [ event
.offsetX
, event
.offsetY
];
1528 var eventElementPos
= utils
.findPos(this.mouseEventElement_
);
1529 var canvasx
= utils
.pageX(event
) - eventElementPos
.x
;
1530 var canvasy
= utils
.pageY(event
) - eventElementPos
.y
;
1531 return [canvasx
, canvasy
];
1536 * Given a canvas X coordinate, find the closest row.
1537 * @param {number} domX graph-relative DOM X coordinate
1538 * Returns {number} row number.
1541 Dygraph
.prototype.findClosestRow
= function(domX
) {
1542 var minDistX
= Infinity
;
1543 var closestRow
= -1;
1544 var sets
= this.layout_
.points
;
1545 for (var i
= 0; i
< sets
.length
; i
++) {
1546 var points
= sets
[i
];
1547 var len
= points
.length
;
1548 for (var j
= 0; j
< len
; j
++) {
1549 var point
= points
[j
];
1550 if (!utils
.isValidPoint(point
, true)) continue;
1551 var dist
= Math
.abs(point
.canvasx
- domX
);
1552 if (dist
< minDistX
) {
1554 closestRow
= point
.idx
;
1563 * Given canvas X,Y coordinates, find the closest point.
1565 * This finds the individual data point across all visible series
1566 * that's closest to the supplied DOM coordinates using the standard
1567 * Euclidean X,Y distance.
1569 * @param {number} domX graph-relative DOM X coordinate
1570 * @param {number} domY graph-relative DOM Y coordinate
1571 * Returns: {row, seriesName, point}
1574 Dygraph
.prototype.findClosestPoint
= function(domX
, domY
) {
1575 var minDist
= Infinity
;
1576 var dist
, dx
, dy
, point
, closestPoint
, closestSeries
, closestRow
;
1577 for ( var setIdx
= this.layout_
.points
.length
- 1 ; setIdx
>= 0 ; --setIdx
) {
1578 var points
= this.layout_
.points
[setIdx
];
1579 for (var i
= 0; i
< points
.length
; ++i
) {
1581 if (!utils
.isValidPoint(point
)) continue;
1582 dx
= point
.canvasx
- domX
;
1583 dy
= point
.canvasy
- domY
;
1584 dist
= dx
* dx
+ dy
* dy
;
1585 if (dist
< minDist
) {
1587 closestPoint
= point
;
1588 closestSeries
= setIdx
;
1589 closestRow
= point
.idx
;
1593 var name
= this.layout_
.setNames
[closestSeries
];
1602 * Given canvas X,Y coordinates, find the touched area in a stacked graph.
1604 * This first finds the X data point closest to the supplied DOM X coordinate,
1605 * then finds the series which puts the Y coordinate on top of its filled area,
1606 * using linear interpolation between adjacent point pairs.
1608 * @param {number} domX graph-relative DOM X coordinate
1609 * @param {number} domY graph-relative DOM Y coordinate
1610 * Returns: {row, seriesName, point}
1613 Dygraph
.prototype.findStackedPoint
= function(domX
, domY
) {
1614 var row
= this.findClosestRow(domX
);
1615 var closestPoint
, closestSeries
;
1616 for (var setIdx
= 0; setIdx
< this.layout_
.points
.length
; ++setIdx
) {
1617 var boundary
= this.getLeftBoundary_(setIdx
);
1618 var rowIdx
= row
- boundary
;
1619 var points
= this.layout_
.points
[setIdx
];
1620 if (rowIdx
>= points
.length
) continue;
1621 var p1
= points
[rowIdx
];
1622 if (!utils
.isValidPoint(p1
)) continue;
1623 var py
= p1
.canvasy
;
1624 if (domX
> p1
.canvasx
&& rowIdx
+ 1 < points
.length
) {
1625 // interpolate series Y value using next point
1626 var p2
= points
[rowIdx
+ 1];
1627 if (utils
.isValidPoint(p2
)) {
1628 var dx
= p2
.canvasx
- p1
.canvasx
;
1630 var r
= (domX
- p1
.canvasx
) / dx
;
1631 py
+= r
* (p2
.canvasy
- p1
.canvasy
);
1634 } else if (domX
< p1
.canvasx
&& rowIdx
> 0) {
1635 // interpolate series Y value using previous point
1636 var p0
= points
[rowIdx
- 1];
1637 if (utils
.isValidPoint(p0
)) {
1638 var dx
= p1
.canvasx
- p0
.canvasx
;
1640 var r
= (p1
.canvasx
- domX
) / dx
;
1641 py
+= r
* (p0
.canvasy
- p1
.canvasy
);
1645 // Stop if the point (domX, py) is above this series' upper edge
1646 if (setIdx
=== 0 || py
< domY
) {
1648 closestSeries
= setIdx
;
1651 var name
= this.layout_
.setNames
[closestSeries
];
1660 * When the mouse moves in the canvas, display information about a nearby data
1661 * point and draw dots over those points in the data series. This function
1662 * takes care of cleanup of previously-drawn dots.
1663 * @param {Object} event The mousemove event from the browser.
1666 Dygraph
.prototype.mouseMove_
= function(event
) {
1667 // This prevents JS errors when mousing over the canvas before data loads.
1668 var points
= this.layout_
.points
;
1669 if (points
=== undefined
|| points
=== null) return;
1671 var canvasCoords
= this.eventToDomCoords(event
);
1672 var canvasx
= canvasCoords
[0];
1673 var canvasy
= canvasCoords
[1];
1675 var highlightSeriesOpts
= this.getOption("highlightSeriesOpts");
1676 var selectionChanged
= false;
1677 if (highlightSeriesOpts
&& !this.isSeriesLocked()) {
1679 if (this.getBooleanOption("stackedGraph")) {
1680 closest
= this.findStackedPoint(canvasx
, canvasy
);
1682 closest
= this.findClosestPoint(canvasx
, canvasy
);
1684 selectionChanged
= this.setSelection(closest
.row
, closest
.seriesName
);
1686 var idx
= this.findClosestRow(canvasx
);
1687 selectionChanged
= this.setSelection(idx
);
1690 var callback
= this.getFunctionOption("highlightCallback");
1691 if (callback
&& selectionChanged
) {
1692 callback
.call(this, event
,
1696 this.highlightSet_
);
1701 * Fetch left offset from the specified set index or if not passed, the
1702 * first defined boundaryIds record (see bug #236).
1705 Dygraph
.prototype.getLeftBoundary_
= function(setIdx
) {
1706 if (this.boundaryIds_
[setIdx
]) {
1707 return this.boundaryIds_
[setIdx
][0];
1709 for (var i
= 0; i
< this.boundaryIds_
.length
; i
++) {
1710 if (this.boundaryIds_
[i
] !== undefined
) {
1711 return this.boundaryIds_
[i
][0];
1718 Dygraph
.prototype.animateSelection_
= function(direction
) {
1719 var totalSteps
= 10;
1721 if (this.fadeLevel
=== undefined
) this.fadeLevel
= 0;
1722 if (this.animateId
=== undefined
) this.animateId
= 0;
1723 var start
= this.fadeLevel
;
1724 var steps
= direction
< 0 ? start
: totalSteps
- start
;
1726 if (this.fadeLevel
) {
1727 this.updateSelection_(1.0);
1732 var thisId
= ++this.animateId
;
1734 var cleanupIfClearing
= function() {
1735 // if we haven't reached fadeLevel 0 in the max frame time,
1736 // ensure that the clear happens and just go to 0
1737 if (that
.fadeLevel
!== 0 && direction
< 0) {
1739 that
.clearSelection();
1742 utils
.repeatAndCleanup(
1744 // ignore simultaneous animations
1745 if (that
.animateId
!= thisId
) return;
1747 that
.fadeLevel
+= direction
;
1748 if (that
.fadeLevel
=== 0) {
1749 that
.clearSelection();
1751 that
.updateSelection_(that
.fadeLevel
/ totalSteps
);
1754 steps
, millis
, cleanupIfClearing
);
1758 * Draw dots over the selectied points in the data series. This function
1759 * takes care of cleanup of previously-drawn dots.
1762 Dygraph
.prototype.updateSelection_
= function(opt_animFraction
) {
1763 /*var defaultPrevented = */
1764 this.cascadeEvents_('select', {
1765 selectedRow
: this.lastRow_
,
1766 selectedX
: this.lastx_
,
1767 selectedPoints
: this.selPoints_
1769 // TODO(danvk): use defaultPrevented here?
1771 // Clear the previously drawn vertical, if there is one
1773 var ctx
= this.canvas_ctx_
;
1774 if (this.getOption('highlightSeriesOpts')) {
1775 ctx
.clearRect(0, 0, this.width_
, this.height_
);
1776 var alpha
= 1.0 - this.getNumericOption('highlightSeriesBackgroundAlpha');
1777 var backgroundColor
= utils
.toRGB_(this.getOption('highlightSeriesBackgroundColor'));
1780 // Activating background fade includes an animation effect for a gradual
1781 // fade. TODO(klausw): make this independently configurable if it causes
1782 // issues? Use a shared preference to control animations?
1783 var animateBackgroundFade
= true;
1784 if (animateBackgroundFade
) {
1785 if (opt_animFraction
=== undefined
) {
1786 // start a new animation
1787 this.animateSelection_(1);
1790 alpha
*= opt_animFraction
;
1792 ctx
.fillStyle
= 'rgba(' + backgroundColor
.r
+ ',' + backgroundColor
.g
+ ',' + backgroundColor
.b
+ ',' + alpha
+ ')';
1793 ctx
.fillRect(0, 0, this.width_
, this.height_
);
1796 // Redraw only the highlighted series in the interactive canvas (not the
1797 // static plot canvas, which is where series are usually drawn).
1798 this.plotter_
._renderLineChart(this.highlightSet_
, ctx
);
1799 } else if (this.previousVerticalX_
>= 0) {
1800 // Determine the maximum highlight circle size.
1801 var maxCircleSize
= 0;
1802 var labels
= this.attr_('labels');
1803 for (i
= 1; i
< labels
.length
; i
++) {
1804 var r
= this.getNumericOption('highlightCircleSize', labels
[i
]);
1805 if (r
> maxCircleSize
) maxCircleSize
= r
;
1807 var px
= this.previousVerticalX_
;
1808 ctx
.clearRect(px
- maxCircleSize
- 1, 0,
1809 2 * maxCircleSize
+ 2, this.height_
);
1812 if (this.selPoints_
.length
> 0) {
1813 // Draw colored circles over the center of each selected point
1814 var canvasx
= this.selPoints_
[0].canvasx
;
1816 for (i
= 0; i
< this.selPoints_
.length
; i
++) {
1817 var pt
= this.selPoints_
[i
];
1818 if (isNaN(pt
.canvasy
)) continue;
1820 var circleSize
= this.getNumericOption('highlightCircleSize', pt
.name
);
1821 var callback
= this.getFunctionOption("drawHighlightPointCallback", pt
.name
);
1822 var color
= this.plotter_
.colors
[pt
.name
];
1824 callback
= utils
.Circles
.DEFAULT
;
1826 ctx
.lineWidth
= this.getNumericOption('strokeWidth', pt
.name
);
1827 ctx
.strokeStyle
= color
;
1828 ctx
.fillStyle
= color
;
1829 callback
.call(this, this, pt
.name
, ctx
, canvasx
, pt
.canvasy
,
1830 color
, circleSize
, pt
.idx
);
1834 this.previousVerticalX_
= canvasx
;
1839 * Manually set the selected points and display information about them in the
1840 * legend. The selection can be cleared using clearSelection() and queried
1841 * using getSelection().
1842 * @param {number} row Row number that should be highlighted (i.e. appear with
1843 * hover dots on the chart).
1844 * @param {seriesName} optional series name to highlight that series with the
1845 * the highlightSeriesOpts setting.
1846 * @param { locked } optional If true, keep seriesName selected when mousing
1847 * over the graph, disabling closest-series highlighting. Call clearSelection()
1850 Dygraph
.prototype.setSelection
= function(row
, opt_seriesName
, opt_locked
) {
1851 // Extract the points we've selected
1852 this.selPoints_
= [];
1854 var changed
= false;
1855 if (row
!== false && row
>= 0) {
1856 if (row
!= this.lastRow_
) changed
= true;
1857 this.lastRow_
= row
;
1858 for (var setIdx
= 0; setIdx
< this.layout_
.points
.length
; ++setIdx
) {
1859 var points
= this.layout_
.points
[setIdx
];
1860 // Check if the point at the appropriate index is the point we're looking
1861 // for. If it is, just use it, otherwise search the array for a point
1862 // in the proper place.
1863 var setRow
= row
- this.getLeftBoundary_(setIdx
);
1864 if (setRow
< points
.length
&& points
[setRow
].idx
== row
) {
1865 var point
= points
[setRow
];
1866 if (point
.yval
!== null) this.selPoints_
.push(point
);
1868 for (var pointIdx
= 0; pointIdx
< points
.length
; ++pointIdx
) {
1869 var point
= points
[pointIdx
];
1870 if (point
.idx
== row
) {
1871 if (point
.yval
!== null) {
1872 this.selPoints_
.push(point
);
1880 if (this.lastRow_
>= 0) changed
= true;
1884 if (this.selPoints_
.length
) {
1885 this.lastx_
= this.selPoints_
[0].xval
;
1890 if (opt_seriesName
!== undefined
) {
1891 if (this.highlightSet_
!== opt_seriesName
) changed
= true;
1892 this.highlightSet_
= opt_seriesName
;
1895 if (opt_locked
!== undefined
) {
1896 this.lockedSet_
= opt_locked
;
1900 this.updateSelection_(undefined
);
1906 * The mouse has left the canvas. Clear out whatever artifacts remain
1907 * @param {Object} event the mouseout event from the browser.
1910 Dygraph
.prototype.mouseOut_
= function(event
) {
1911 if (this.getFunctionOption("unhighlightCallback")) {
1912 this.getFunctionOption("unhighlightCallback").call(this, event
);
1915 if (this.getBooleanOption("hideOverlayOnMouseOut") && !this.lockedSet_
) {
1916 this.clearSelection();
1921 * Clears the current selection (i.e. points that were highlighted by moving
1922 * the mouse over the chart).
1924 Dygraph
.prototype.clearSelection
= function() {
1925 this.cascadeEvents_('deselect', {});
1927 this.lockedSet_
= false;
1928 // Get rid of the overlay data
1929 if (this.fadeLevel
) {
1930 this.animateSelection_(-1);
1933 this.canvas_ctx_
.clearRect(0, 0, this.width_
, this.height_
);
1935 this.selPoints_
= [];
1938 this.highlightSet_
= null;
1942 * Returns the number of the currently selected row. To get data for this row,
1943 * you can use the getValue method.
1944 * @return {number} row number, or -1 if nothing is selected
1946 Dygraph
.prototype.getSelection
= function() {
1947 if (!this.selPoints_
|| this.selPoints_
.length
< 1) {
1951 for (var setIdx
= 0; setIdx
< this.layout_
.points
.length
; setIdx
++) {
1952 var points
= this.layout_
.points
[setIdx
];
1953 for (var row
= 0; row
< points
.length
; row
++) {
1954 if (points
[row
].x
== this.selPoints_
[0].x
) {
1955 return points
[row
].idx
;
1963 * Returns the name of the currently-highlighted series.
1964 * Only available when the highlightSeriesOpts option is in use.
1966 Dygraph
.prototype.getHighlightSeries
= function() {
1967 return this.highlightSet_
;
1971 * Returns true if the currently-highlighted series was locked
1972 * via setSelection(..., seriesName, true).
1974 Dygraph
.prototype.isSeriesLocked
= function() {
1975 return this.lockedSet_
;
1979 * Fires when there's data available to be graphed.
1980 * @param {string} data Raw CSV data to be plotted
1983 Dygraph
.prototype.loadedEvent_
= function(data
) {
1984 this.rawData_
= this.parseCSV_(data
);
1985 this.cascadeDataDidUpdateEvent_();
1990 * Add ticks on the x-axis representing years, months, quarters, weeks, or days
1993 Dygraph
.prototype.addXTicks_
= function() {
1994 // Determine the correct ticks scale on the x-axis: quarterly, monthly, ...
1996 if (this.dateWindow_
) {
1997 range
= [this.dateWindow_
[0], this.dateWindow_
[1]];
1999 range
= this.xAxisExtremes();
2002 var xAxisOptionsView
= this.optionsViewForAxis_('x');
2003 var xTicks
= xAxisOptionsView('ticker')(
2006 this.plotter_
.area
.w
, // TODO(danvk): should be area.width
2009 // var msg = 'ticker(' + range[0] + ', ' + range[1] + ', ' + this.width_ + ', ' + this.attr_('pixelsPerXLabel') + ') -> ' + JSON.stringify(xTicks);
2010 // console.log(msg);
2011 this.layout_
.setXTicks(xTicks
);
2015 * Returns the correct handler class for the currently set options.
2018 Dygraph
.prototype.getHandlerClass_
= function() {
2020 if (this.attr_('dataHandler')) {
2021 handlerClass
= this.attr_('dataHandler');
2022 } else if (this.fractions_
) {
2023 if (this.getBooleanOption('errorBars')) {
2024 handlerClass
= FractionsBarsHandler
;
2026 handlerClass
= DefaultFractionHandler
;
2028 } else if (this.getBooleanOption('customBars')) {
2029 handlerClass
= CustomBarsHandler
;
2030 } else if (this.getBooleanOption('errorBars')) {
2031 handlerClass
= ErrorBarsHandler
;
2033 handlerClass
= DefaultHandler
;
2035 return handlerClass
;
2040 * This function is called once when the chart's data is changed or the options
2041 * dictionary is updated. It is _not_ called when the user pans or zooms. The
2042 * idea is that values derived from the chart's data can be computed here,
2043 * rather than every time the chart is drawn. This includes things like the
2044 * number of axes, rolling averages, etc.
2046 Dygraph
.prototype.predraw_
= function() {
2047 var start
= new Date();
2049 // Create the correct dataHandler
2050 this.dataHandler_
= new (this.getHandlerClass_())();
2052 this.layout_
.computePlotArea();
2054 // TODO(danvk): move more computations out of drawGraph_ and into here.
2055 this.computeYAxes_();
2057 if (!this.is_initial_draw_
) {
2058 this.canvas_ctx_
.restore();
2059 this.hidden_ctx_
.restore();
2062 this.canvas_ctx_
.save();
2063 this.hidden_ctx_
.save();
2065 // Create a new plotter.
2066 this.plotter_
= new DygraphCanvasRenderer(this,
2071 // The roller sits in the bottom left corner of the chart. We don't know where
2072 // this will be until the options are available, so it's positioned here.
2073 this.createRollInterface_();
2075 this.cascadeEvents_('predraw');
2077 // Convert the raw data (a 2D array) into the internal format and compute
2078 // rolling averages.
2079 this.rolledSeries_
= [null]; // x-axis is the first series and it's special
2080 for (var i
= 1; i
< this.numColumns(); i
++) {
2081 // var logScale = this.attr_('logscale', i); // TODO(klausw): this looks wrong // konigsberg thinks so too
.
2082 var series
= this.dataHandler_
.extractSeries(this.rawData_
, i
, this.attributes_
);
2083 if (this.rollPeriod_
> 1) {
2084 series
= this.dataHandler_
.rollingAverage(series
, this.rollPeriod_
, this.attributes_
);
2087 this.rolledSeries_
.push(series
);
2090 // If the data or options have changed, then we'd better redraw.
2093 // This is used to determine whether to do various animations.
2094 var end
= new Date();
2095 this.drawingTimeMs_
= (end
- start
);
2101 * xval_* and yval_* are the original unscaled data values,
2102 * while x_* and y_* are scaled to the range (0.0-1.0) for plotting.
2103 * yval_stacked is the cumulative Y value used for stacking graphs,
2104 * and bottom/top/minus/plus are used for error bar graphs.
2111 * y_bottom: ?number,
2113 * y_stacked: ?number,
2115 * yval_minus: ?number,
2117 * yval_plus: ?number,
2121 Dygraph
.PointType
= undefined
;
2124 * Calculates point stacking for stackedGraph=true.
2126 * For stacking purposes, interpolate or extend neighboring data across
2127 * NaN values based on stackedGraphNaNFill settings. This is for display
2128 * only, the underlying data value as shown in the legend remains NaN.
2130 * @param {Array.<Dygraph.PointType>} points Point array for a single series.
2131 * Updates each Point's yval_stacked property.
2132 * @param {Array.<number>} cumulativeYval Accumulated top-of-graph stacked Y
2133 * values for the series seen so far. Index is the row number. Updated
2134 * based on the current series's values.
2135 * @param {Array.<number>} seriesExtremes Min and max values, updated
2136 * to reflect the stacked values.
2137 * @param {string} fillMethod Interpolation method, one of 'all', 'inside', or
2141 Dygraph
.stackPoints_
= function(
2142 points
, cumulativeYval
, seriesExtremes
, fillMethod
) {
2143 var lastXval
= null;
2144 var prevPoint
= null;
2145 var nextPoint
= null;
2146 var nextPointIdx
= -1;
2148 // Find the next stackable point starting from the given index.
2149 var updateNextPoint
= function(idx
) {
2150 // If we've previously found a non-NaN point and haven't gone past it yet,
2152 if (nextPointIdx
>= idx
) return;
2154 // We haven't found a non-NaN point yet or have moved past it,
2155 // look towards the right to find a non-NaN point.
2156 for (var j
= idx
; j
< points
.length
; ++j
) {
2157 // Clear out a previously-found point (if any) since it's no longer
2158 // valid, we shouldn't use it for interpolation anymore.
2160 if (!isNaN(points
[j
].yval
) && points
[j
].yval
!== null) {
2162 nextPoint
= points
[j
];
2168 for (var i
= 0; i
< points
.length
; ++i
) {
2169 var point
= points
[i
];
2170 var xval
= point
.xval
;
2171 if (cumulativeYval
[xval
] === undefined
) {
2172 cumulativeYval
[xval
] = 0;
2175 var actualYval
= point
.yval
;
2176 if (isNaN(actualYval
) || actualYval
=== null) {
2177 if(fillMethod
== 'none') {
2180 // Interpolate/extend
for stacking purposes
if possible
.
2182 if (prevPoint
&& nextPoint
&& fillMethod
!= 'none') {
2183 // Use linear interpolation between prevPoint and nextPoint.
2184 actualYval
= prevPoint
.yval
+ (nextPoint
.yval
- prevPoint
.yval
) *
2185 ((xval
- prevPoint
.xval
) / (nextPoint
.xval
- prevPoint
.xval
));
2186 } else if (prevPoint
&& fillMethod
== 'all') {
2187 actualYval
= prevPoint
.yval
;
2188 } else if (nextPoint
&& fillMethod
== 'all') {
2189 actualYval
= nextPoint
.yval
;
2198 var stackedYval
= cumulativeYval
[xval
];
2199 if (lastXval
!= xval
) {
2200 // If an x-value is repeated, we ignore the duplicates.
2201 stackedYval
+= actualYval
;
2202 cumulativeYval
[xval
] = stackedYval
;
2206 point
.yval_stacked
= stackedYval
;
2208 if (stackedYval
> seriesExtremes
[1]) {
2209 seriesExtremes
[1] = stackedYval
;
2211 if (stackedYval
< seriesExtremes
[0]) {
2212 seriesExtremes
[0] = stackedYval
;
2219 * Loop over all fields and create datasets, calculating extreme y-values for
2220 * each series and extreme x-indices as we go.
2222 * dateWindow is passed in as an explicit parameter so that we can compute
2223 * extreme values "speculatively", i.e. without actually setting state on the
2226 * @param {Array.<Array.<Array.<(number|Array<number>)>>} rolledSeries, where
2227 * rolledSeries[seriesIndex][row] = raw point, where
2228 * seriesIndex is the column number starting with 1, and
2229 * rawPoint is [x,y] or [x, [y, err]] or [x, [y, yminus, yplus]].
2230 * @param {?Array.<number>} dateWindow [xmin, xmax] pair, or null.
2232 * points: Array.<Array.<Dygraph.PointType>>,
2233 * seriesExtremes: Array.<Array.<number>>,
2234 * boundaryIds: Array.<number>}}
2237 Dygraph
.prototype.gatherDatasets_
= function(rolledSeries
, dateWindow
) {
2238 var boundaryIds
= [];
2240 var cumulativeYval
= []; // For stacked series.
2241 var extremes
= {}; // series name -> [low, high]
2242 var seriesIdx
, sampleIdx
;
2243 var firstIdx
, lastIdx
;
2246 // Loop over the fields (series). Go from the last to the first,
2247 // because if they're stacked that's how we accumulate the values.
2248 var num_series
= rolledSeries
.length
- 1;
2250 for (seriesIdx
= num_series
; seriesIdx
>= 1; seriesIdx
--) {
2251 if (!this.visibility()[seriesIdx
- 1]) continue;
2253 // Prune down to the desired range, if necessary (for zooming)
2254 // Because there can be lines going to points outside of the visible area,
2255 // we actually prune to visible points, plus one on either side.
2257 series
= rolledSeries
[seriesIdx
];
2258 var low
= dateWindow
[0];
2259 var high
= dateWindow
[1];
2261 // TODO(danvk): do binary search instead of linear search.
2262 // TODO(danvk): pass firstIdx and lastIdx directly to the renderer.
2265 for (sampleIdx
= 0; sampleIdx
< series
.length
; sampleIdx
++) {
2266 if (series
[sampleIdx
][0] >= low
&& firstIdx
=== null) {
2267 firstIdx
= sampleIdx
;
2269 if (series
[sampleIdx
][0] <= high
) {
2270 lastIdx
= sampleIdx
;
2274 if (firstIdx
=== null) firstIdx
= 0;
2275 var correctedFirstIdx
= firstIdx
;
2276 var isInvalidValue
= true;
2277 while (isInvalidValue
&& correctedFirstIdx
> 0) {
2278 correctedFirstIdx
--;
2279 // check if the y value is null.
2280 isInvalidValue
= series
[correctedFirstIdx
][1] === null;
2283 if (lastIdx
=== null) lastIdx
= series
.length
- 1;
2284 var correctedLastIdx
= lastIdx
;
2285 isInvalidValue
= true;
2286 while (isInvalidValue
&& correctedLastIdx
< series
.length
- 1) {
2288 isInvalidValue
= series
[correctedLastIdx
][1] === null;
2291 if (correctedFirstIdx
!==firstIdx
) {
2292 firstIdx
= correctedFirstIdx
;
2294 if (correctedLastIdx
!== lastIdx
) {
2295 lastIdx
= correctedLastIdx
;
2298 boundaryIds
[seriesIdx
-1] = [firstIdx
, lastIdx
];
2300 // .slice's end is exclusive, we want to include lastIdx.
2301 series
= series
.slice(firstIdx
, lastIdx
+ 1);
2303 series
= rolledSeries
[seriesIdx
];
2304 boundaryIds
[seriesIdx
-1] = [0, series
.length
-1];
2307 var seriesName
= this.attr_("labels")[seriesIdx
];
2308 var seriesExtremes
= this.dataHandler_
.getExtremeYValues(series
,
2309 dateWindow
, this.getBooleanOption("stepPlot",seriesName
));
2311 var seriesPoints
= this.dataHandler_
.seriesToPoints(series
,
2312 seriesName
, boundaryIds
[seriesIdx
-1][0]);
2314 if (this.getBooleanOption("stackedGraph")) {
2315 axisIdx
= this.attributes_
.axisForSeries(seriesName
);
2316 if (cumulativeYval
[axisIdx
] === undefined
) {
2317 cumulativeYval
[axisIdx
] = [];
2319 Dygraph
.stackPoints_(seriesPoints
, cumulativeYval
[axisIdx
], seriesExtremes
,
2320 this.getBooleanOption("stackedGraphNaNFill"));
2323 extremes
[seriesName
] = seriesExtremes
;
2324 points
[seriesIdx
] = seriesPoints
;
2327 return { points
: points
, extremes
: extremes
, boundaryIds
: boundaryIds
};
2331 * Update the graph with new data. This method is called when the viewing area
2332 * has changed. If the underlying data or options have changed, predraw_ will
2333 * be called before drawGraph_ is called.
2337 Dygraph
.prototype.drawGraph_
= function() {
2338 var start
= new Date();
2340 // This is used to set the second parameter to drawCallback, below.
2341 var is_initial_draw
= this.is_initial_draw_
;
2342 this.is_initial_draw_
= false;
2344 this.layout_
.removeAllDatasets();
2346 this.attrs_
.pointSize
= 0.5 * this.getNumericOption('highlightCircleSize');
2348 var packed
= this.gatherDatasets_(this.rolledSeries_
, this.dateWindow_
);
2349 var points
= packed
.points
;
2350 var extremes
= packed
.extremes
;
2351 this.boundaryIds_
= packed
.boundaryIds
;
2353 this.setIndexByName_
= {};
2354 var labels
= this.attr_("labels");
2355 if (labels
.length
> 0) {
2356 this.setIndexByName_
[labels
[0]] = 0;
2359 for (var i
= 1; i
< points
.length
; i
++) {
2360 this.setIndexByName_
[labels
[i
]] = i
;
2361 if (!this.visibility()[i
- 1]) continue;
2362 this.layout_
.addDataset(labels
[i
], points
[i
]);
2363 this.datasetIndex_
[i
] = dataIdx
++;
2366 this.computeYAxisRanges_(extremes
);
2367 this.layout_
.setYAxes(this.axes_
);
2371 // Save the X axis zoomed status as the updateOptions call will tend to set it erroneously
2372 var tmp_zoomed_x
= this.zoomed_x_
;
2373 // Tell PlotKit to use this new data and render itself
2374 this.zoomed_x_
= tmp_zoomed_x
;
2375 this.layout_
.evaluate();
2376 this.renderGraph_(is_initial_draw
);
2378 if (this.getStringOption("timingName")) {
2379 var end
= new Date();
2380 console
.log(this.getStringOption("timingName") + " - drawGraph: " + (end
- start
) + "ms");
2385 * This does the work of drawing the chart. It assumes that the layout and axis
2386 * scales have already been set (e.g. by predraw_).
2390 Dygraph
.prototype.renderGraph_
= function(is_initial_draw
) {
2391 this.cascadeEvents_('clearChart');
2392 this.plotter_
.clear();
2394 if (this.getFunctionOption('underlayCallback')) {
2395 // NOTE: we pass the dygraph object to this callback twice to avoid breaking
2396 // users who expect a deprecated form of this callback.
2397 this.getFunctionOption('underlayCallback').call(this,
2398 this.hidden_ctx_
, this.layout_
.getPlotArea(), this, this);
2402 canvas
: this.hidden_
,
2403 drawingContext
: this.hidden_ctx_
2405 this.cascadeEvents_('willDrawChart', e
);
2406 this.plotter_
.render();
2407 this.cascadeEvents_('didDrawChart', e
);
2408 this.lastRow_
= -1; // because plugins/legend.js clears the legend
2410 // TODO(danvk): is this a performance bottleneck when panning?
2411 // The interaction canvas should already be empty in that situation.
2412 this.canvas_
.getContext('2d').clearRect(0, 0, this.width_
, this.height_
);
2414 if (this.getFunctionOption("drawCallback") !== null) {
2415 this.getFunctionOption("drawCallback").call(this, this, is_initial_draw
);
2417 if (is_initial_draw
) {
2418 this.readyFired_
= true;
2419 while (this.readyFns_
.length
> 0) {
2420 var fn
= this.readyFns_
.pop();
2428 * Determine properties of the y-axes which are independent of the data
2429 * currently being displayed. This includes things like the number of axes and
2430 * the style of the axes. It does not include the range of each axis and its
2432 * This fills in this.axes_.
2433 * axes_ = [ { options } ]
2434 * indices are into the axes_ array.
2436 Dygraph
.prototype.computeYAxes_
= function() {
2437 // Preserve valueWindow settings if they exist, and if the user hasn't
2438 // specified a new valueRange.
2439 var valueWindows
, axis
, index
, opts
, v
;
2440 if (this.axes_
!== undefined
&& this.user_attrs_
.hasOwnProperty("valueRange") === false) {
2442 for (index
= 0; index
< this.axes_
.length
; index
++) {
2443 valueWindows
.push(this.axes_
[index
].valueWindow
);
2447 // this.axes_ doesn't match this.attributes_.axes_.options. It's used for
2448 // data computation as well as options storage.
2449 // Go through once and add all the axes.
2452 for (axis
= 0; axis
< this.attributes_
.numAxes(); axis
++) {
2453 // Add a new axis, making a copy of its per-axis options.
2454 opts
= { g
: this };
2455 utils
.update(opts
, this.attributes_
.axisOptions(axis
));
2456 this.axes_
[axis
] = opts
;
2460 // Copy global valueRange option over to the first axis.
2461 // NOTE(konigsberg): Are these two statements necessary?
2462 // I tried removing it. The automated tests pass, and manually
2463 // messing with tests/zoom
.html showed no trouble
.
2464 v
= this.attr_('valueRange');
2465 if (v
) this.axes_
[0].valueRange
= v
;
2467 if (valueWindows
!== undefined
) {
2468 // Restore valueWindow settings.
2470 // When going from two axes back to one, we only restore
2472 var idxCount
= Math
.min(valueWindows
.length
, this.axes_
.length
);
2474 for (index
= 0; index
< idxCount
; index
++) {
2475 this.axes_
[index
].valueWindow
= valueWindows
[index
];
2479 for (axis
= 0; axis
< this.axes_
.length
; axis
++) {
2481 opts
= this.optionsViewForAxis_('y' + (axis
? '2' : ''));
2482 v
= opts("valueRange");
2483 if (v
) this.axes_
[axis
].valueRange
= v
;
2484 } else { // To keep old behavior
2485 var axes
= this.user_attrs_
.axes
;
2486 if (axes
&& axes
.y2
) {
2487 v
= axes
.y2
.valueRange
;
2488 if (v
) this.axes_
[axis
].valueRange
= v
;
2495 * Returns the number of y-axes on the chart.
2496 * @return {number} the number of axes.
2498 Dygraph
.prototype.numAxes
= function() {
2499 return this.attributes_
.numAxes();
2504 * Returns axis properties for the given series.
2505 * @param {string} setName The name of the series for which to get axis
2506 * properties, e.g. 'Y1'.
2507 * @return {Object} The axis properties.
2509 Dygraph
.prototype.axisPropertiesForSeries
= function(series
) {
2510 // TODO(danvk): handle errors.
2511 return this.axes_
[this.attributes_
.axisForSeries(series
)];
2516 * Determine the value range and tick marks for each axis.
2517 * @param {Object} extremes A mapping from seriesName -> [low, high]
2518 * This fills in the valueRange and ticks fields in each entry of this.axes_.
2520 Dygraph
.prototype.computeYAxisRanges_
= function(extremes
) {
2521 var isNullUndefinedOrNaN
= function(num
) {
2522 return isNaN(parseFloat(num
));
2524 var numAxes
= this.attributes_
.numAxes();
2525 var ypadCompat
, span
, series
, ypad
;
2529 // Compute extreme values, a span and tick marks for each axis.
2530 for (var i
= 0; i
< numAxes
; i
++) {
2531 var axis
= this.axes_
[i
];
2532 var logscale
= this.attributes_
.getForAxis("logscale", i
);
2533 var includeZero
= this.attributes_
.getForAxis("includeZero", i
);
2534 var independentTicks
= this.attributes_
.getForAxis("independentTicks", i
);
2535 series
= this.attributes_
.seriesForAxis(i
);
2537 // Add some padding. This supports two Y padding operation modes:
2539 // - backwards compatible (yRangePad not set):
2540 // 10% padding for automatic Y ranges, but not for user-supplied
2541 // ranges, and move a close-to-zero edge to zero except if
2542 // avoidMinZero is set, since drawing at the edge results in
2543 // invisible lines. Unfortunately lines drawn at the edge of a
2544 // user-supplied range will still be invisible. If logscale is
2545 // set, add a variable amount of padding at the top but
2546 // none at the bottom.
2548 // - new-style (yRangePad set by the user):
2549 // always add the specified Y padding.
2552 ypad
= 0.1; // add 10%
2553 if (this.getNumericOption('yRangePad') !== null) {
2555 // Convert pixel padding to ratio
2556 ypad
= this.getNumericOption('yRangePad') / this.plotter_
.area
.h
;
2559 if (series
.length
=== 0) {
2560 // If no series are defined or visible then use a reasonable default
2561 axis
.extremeRange
= [0, 1];
2563 // Calculate the extremes of extremes.
2564 var minY
= Infinity
; // extremes[series[0]][0];
2565 var maxY
= -Infinity
; // extremes[series[0]][1];
2566 var extremeMinY
, extremeMaxY
;
2568 for (var j
= 0; j
< series
.length
; j
++) {
2569 // this skips invisible series
2570 if (!extremes
.hasOwnProperty(series
[j
])) continue;
2572 // Only use valid extremes to stop null data series' from corrupting the scale.
2573 extremeMinY
= extremes
[series
[j
]][0];
2574 if (extremeMinY
!== null) {
2575 minY
= Math
.min(extremeMinY
, minY
);
2577 extremeMaxY
= extremes
[series
[j
]][1];
2578 if (extremeMaxY
!== null) {
2579 maxY
= Math
.max(extremeMaxY
, maxY
);
2583 // Include zero if requested by the user.
2584 if (includeZero
&& !logscale
) {
2585 if (minY
> 0) minY
= 0;
2586 if (maxY
< 0) maxY
= 0;
2589 // Ensure we have a valid scale, otherwise default to [0, 1] for safety.
2590 if (minY
== Infinity
) minY
= 0;
2591 if (maxY
== -Infinity
) maxY
= 1;
2594 // special case: if we have no sense of scale, center on the sole value.
2597 span
= Math
.abs(maxY
);
2599 // ... and if the sole value is zero, use range 0-1.
2605 var maxAxisY
, minAxisY
;
2608 maxAxisY
= maxY
+ ypad
* span
;
2611 var logpad
= Math
.exp(Math
.log(span
) * ypad
);
2612 maxAxisY
= maxY
* logpad
;
2613 minAxisY
= minY
/ logpad
;
2616 maxAxisY
= maxY
+ ypad
* span
;
2617 minAxisY
= minY
- ypad
* span
;
2619 // Backwards-compatible behavior: Move the span to start or end at zero if it's
2620 // close to zero, but not if avoidMinZero is set.
2621 if (ypadCompat
&& !this.getBooleanOption("avoidMinZero")) {
2622 if (minAxisY
< 0 && minY
>= 0) minAxisY
= 0;
2623 if (maxAxisY
> 0 && maxY
<= 0) maxAxisY
= 0;
2626 axis
.extremeRange
= [minAxisY
, maxAxisY
];
2628 if (axis
.valueWindow
) {
2629 // This is only set if the user has zoomed on the y-axis. It is never set
2630 // by a user. It takes precedence over axis.valueRange because, if you set
2631 // valueRange, you'd still expect to be able to pan.
2632 axis
.computedValueRange
= [axis
.valueWindow
[0], axis
.valueWindow
[1]];
2633 } else if (axis
.valueRange
) {
2634 // This is a user-set value range for this axis.
2635 var y0
= isNullUndefinedOrNaN(axis
.valueRange
[0]) ? axis
.extremeRange
[0] : axis
.valueRange
[0];
2636 var y1
= isNullUndefinedOrNaN(axis
.valueRange
[1]) ? axis
.extremeRange
[1] : axis
.valueRange
[1];
2638 if (axis
.logscale
) {
2639 var logpad
= Math
.exp(Math
.log(span
) * ypad
);
2648 axis
.computedValueRange
= [y0
, y1
];
2650 axis
.computedValueRange
= axis
.extremeRange
;
2654 if (independentTicks
) {
2655 axis
.independentTicks
= independentTicks
;
2656 var opts
= this.optionsViewForAxis_('y' + (i
? '2' : ''));
2657 var ticker
= opts('ticker');
2658 axis
.ticks
= ticker(axis
.computedValueRange
[0],
2659 axis
.computedValueRange
[1],
2660 this.plotter_
.area
.h
,
2663 // Define the first independent axis as primary axis.
2664 if (!p_axis
) p_axis
= axis
;
2667 if (p_axis
=== undefined
) {
2668 throw ("Configuration Error: At least one axis has to have the \"independentTicks\" option activated.");
2670 // Add ticks. By default, all axes inherit the tick positions of the
2671 // primary axis. However, if an axis is specifically marked as having
2672 // independent ticks, then that is permissible as well.
2673 for (var i
= 0; i
< numAxes
; i
++) {
2674 var axis
= this.axes_
[i
];
2676 if (!axis
.independentTicks
) {
2677 var opts
= this.optionsViewForAxis_('y' + (i
? '2' : ''));
2678 var ticker
= opts('ticker');
2679 var p_ticks
= p_axis
.ticks
;
2680 var p_scale
= p_axis
.computedValueRange
[1] - p_axis
.computedValueRange
[0];
2681 var scale
= axis
.computedValueRange
[1] - axis
.computedValueRange
[0];
2682 var tick_values
= [];
2683 for (var k
= 0; k
< p_ticks
.length
; k
++) {
2684 var y_frac
= (p_ticks
[k
].v
- p_axis
.computedValueRange
[0]) / p_scale
;
2685 var y_val
= axis
.computedValueRange
[0] + y_frac
* scale
;
2686 tick_values
.push(y_val
);
2689 axis
.ticks
= ticker(axis
.computedValueRange
[0],
2690 axis
.computedValueRange
[1],
2691 this.plotter_
.area
.h
,
2700 * Detects the type of the str (date or numeric) and sets the various
2701 * formatting attributes in this.attrs_ based on this type.
2702 * @param {string} str An x value.
2705 Dygraph
.prototype.detectTypeFromString_
= function(str
) {
2707 var dashPos
= str
.indexOf('-'); // could be 2006-01-01 _or_ 1.0e-2
2708 if ((dashPos
> 0 && (str
[dashPos
-1] != 'e' && str
[dashPos
-1] != 'E')) ||
2709 str
.indexOf('/') >= 0 ||
2710 isNaN(parseFloat(str
))) {
2712 } else if (str
.length
== 8 && str
> '19700101' && str
< '20371231') {
2713 // TODO(danvk): remove support for this format.
2717 this.setXAxisOptions_(isDate
);
2720 Dygraph
.prototype.setXAxisOptions_
= function(isDate
) {
2722 this.attrs_
.xValueParser
= utils
.dateParser
;
2723 this.attrs_
.axes
.x
.valueFormatter
= utils
.dateValueFormatter
;
2724 this.attrs_
.axes
.x
.ticker
= DygraphTickers
.dateTicker
;
2725 this.attrs_
.axes
.x
.axisLabelFormatter
= utils
.dateAxisLabelFormatter
;
2727 /** @private (shut up, jsdoc!) */
2728 this.attrs_
.xValueParser
= function(x
) { return parseFloat(x
); };
2729 // TODO(danvk): use Dygraph.numberValueFormatter here?
2730 /** @private (shut up, jsdoc!) */
2731 this.attrs_
.axes
.x
.valueFormatter
= function(x
) { return x
; };
2732 this.attrs_
.axes
.x
.ticker
= DygraphTickers
.numericTicks
;
2733 this.attrs_
.axes
.x
.axisLabelFormatter
= this.attrs_
.axes
.x
.valueFormatter
;
2739 * Parses a string in a special csv format. We expect a csv file where each
2740 * line is a date point, and the first field in each line is the date string.
2741 * We also expect that all remaining fields represent series.
2742 * if the errorBars attribute is set, then interpret the fields as:
2743 * date, series1, stddev1, series2, stddev2, ...
2744 * @param {[Object]} data See above.
2746 * @return [Object] An array with one entry for each row. These entries
2747 * are an array of cells in that row. The first entry is the parsed x-value for
2748 * the row. The second, third, etc. are the y-values. These can take on one of
2749 * three forms, depending on the CSV and constructor parameters:
2751 * 2. [ value, stddev ]
2752 * 3. [ low value, center value, high value ]
2754 Dygraph
.prototype.parseCSV_
= function(data
) {
2756 var line_delimiter
= utils
.detectLineDelimiter(data
);
2757 var lines
= data
.split(line_delimiter
|| "\n");
2760 // Use the default delimiter or fall back to a tab if that makes sense.
2761 var delim
= this.getStringOption('delimiter');
2762 if (lines
[0].indexOf(delim
) == -1 && lines
[0].indexOf('\t') >= 0) {
2767 if (!('labels' in this.user_attrs_
)) {
2768 // User hasn't explicitly set labels, so they're (presumably) in the CSV.
2770 this.attrs_
.labels
= lines
[0].split(delim
); // NOTE: _not_ user_attrs_.
2771 this.attributes_
.reparseSeries();
2776 var defaultParserSet
= false; // attempt to auto-detect x value type
2777 var expectedCols
= this.attr_("labels").length
;
2778 var outOfOrder
= false;
2779 for (var i
= start
; i
< lines
.length
; i
++) {
2780 var line
= lines
[i
];
2782 if (line
.length
=== 0) continue; // skip blank lines
2783 if (line
[0] == '#') continue; // skip comment lines
2784 var inFields
= line
.split(delim
);
2785 if (inFields
.length
< 2) continue;
2788 if (!defaultParserSet
) {
2789 this.detectTypeFromString_(inFields
[0]);
2790 xParser
= this.getFunctionOption("xValueParser");
2791 defaultParserSet
= true;
2793 fields
[0] = xParser(inFields
[0], this);
2795 // If fractions are expected, parse the numbers as "A/B
"
2796 if (this.fractions_) {
2797 for (j = 1; j < inFields.length; j++) {
2798 // TODO(danvk): figure out an appropriate way to flag parse errors.
2799 vals = inFields[j].split("/");
2800 if (vals.length != 2) {
2801 console.error('Expected fractional "num
/den
" values in CSV data ' +
2802 "but found a value
'" + inFields[j] + "' on line
" +
2803 (1 + i) + " ('" + line + "') which is not of
this form
.");
2806 fields[j] = [utils.parseFloat_(vals[0], i, line),
2807 utils.parseFloat_(vals[1], i, line)];
2810 } else if (this.getBooleanOption("errorBars
")) {
2811 // If there are error bars, values are (value, stddev) pairs
2812 if (inFields.length % 2 != 1) {
2813 console.error('Expected alternating (value, stdev.) pairs in CSV data ' +
2814 'but line ' + (1 + i) + ' has an odd number of values (' +
2815 (inFields.length - 1) + "): '" + line + "'");
2817 for (j = 1; j < inFields.length; j += 2) {
2818 fields[(j + 1) / 2] = [utils.parseFloat_(inFields[j], i, line),
2819 utils.parseFloat_(inFields[j + 1], i, line)];
2821 } else if (this.getBooleanOption("customBars
")) {
2822 // Bars are a low;center;high tuple
2823 for (j = 1; j < inFields.length; j++) {
2824 var val = inFields[j];
2825 if (/^ *$/.test(val)) {
2826 fields[j] = [null, null, null];
2828 vals = val.split(";");
2829 if (vals.length == 3) {
2830 fields[j] = [ utils.parseFloat_(vals[0], i, line),
2831 utils.parseFloat_(vals[1], i, line),
2832 utils.parseFloat_(vals[2], i, line) ];
2834 console.warn('When using customBars, values must be either blank ' +
2835 'or "low
;center
;high
" tuples (got "' + val +
2836 '" on line ' + (1+i));
2841 // Values are just numbers
2842 for (j = 1; j < inFields.length; j++) {
2843 fields[j] = utils.parseFloat_(inFields[j], i, line);
2846 if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) {
2850 if (fields.length != expectedCols) {
2851 console.error("Number of columns
in line
" + i + " (" + fields.length +
2852 ") does not agree
with number of
labels (" + expectedCols +
2856 // If the user specified the 'labels' option and none of the cells of the
2857 // first row parsed correctly, then they probably double-specified the
2858 // labels. We go with the values set in the option, discard this row and
2859 // log a warning to the JS console.
2860 if (i === 0 && this.attr_('labels')) {
2861 var all_null = true;
2862 for (j = 0; all_null && j < fields.length; j++) {
2863 if (fields[j]) all_null = false;
2866 console.warn("The dygraphs
'labels' option is set
, but the first row
" +
2867 "of CSV
data ('" + line + "') appears to also contain
" +
2868 "labels
. Will drop the CSV labels and
use the option
" +
2877 console.warn("CSV is out of order
; order it correctly to speed loading
.");
2878 ret.sort(function(a,b) { return a[0] - b[0]; });
2885 * The user has provided their data as a pre-packaged JS array. If the x values
2886 * are numeric, this is the same as dygraphs' internal format. If the x values
2887 * are dates, we need to convert them from Date objects to ms since epoch.
2888 * @param {!Array} data
2889 * @return {Object} data with numeric x values.
2892 Dygraph.prototype.parseArray_ = function(data) {
2893 // Peek at the first x value to see if it's numeric.
2894 if (data.length === 0) {
2895 console.error("Can
't plot empty data set");
2898 if (data[0].length === 0) {
2899 console.error("Data set cannot contain an empty row");
2904 if (this.attr_("labels") === null) {
2905 console.warn("Using default labels. Set labels explicitly via 'labels
' " +
2906 "in the options parameter");
2907 this.attrs_.labels = [ "X" ];
2908 for (i = 1; i < data[0].length; i++) {
2909 this.attrs_.labels.push("Y" + i); // Not user_attrs_.
2911 this.attributes_.reparseSeries();
2913 var num_labels = this.attr_("labels");
2914 if (num_labels.length != data[0].length) {
2915 console.error("Mismatch between number of labels (" + num_labels + ")" +
2916 " and number of columns in array (" + data[0].length + ")");
2921 if (utils.isDateLike(data[0][0])) {
2922 // Some intelligent defaults for a date x-axis.
2923 this.attrs_.axes.x.valueFormatter = utils.dateValueFormatter;
2924 this.attrs_.axes.x.ticker = DygraphTickers.dateTicker;
2925 this.attrs_.axes.x.axisLabelFormatter = utils.dateAxisLabelFormatter;
2927 // Assume they're all dates
.
2928 var parsedData
= utils
.clone(data
);
2929 for (i
= 0; i
< data
.length
; i
++) {
2930 if (parsedData
[i
].length
=== 0) {
2931 console
.error("Row " + (1 + i
) + " of data is empty");
2934 if (parsedData
[i
][0] === null ||
2935 typeof(parsedData
[i
][0].getTime
) != 'function' ||
2936 isNaN(parsedData
[i
][0].getTime())) {
2937 console
.error("x value in row " + (1 + i
) + " is not a Date");
2940 parsedData
[i
][0] = parsedData
[i
][0].getTime();
2944 // Some intelligent defaults for a numeric x-axis.
2945 /** @private (shut up, jsdoc!) */
2946 this.attrs_
.axes
.x
.valueFormatter
= function(x
) { return x
; };
2947 this.attrs_
.axes
.x
.ticker
= DygraphTickers
.numericTicks
;
2948 this.attrs_
.axes
.x
.axisLabelFormatter
= utils
.numberAxisLabelFormatter
;
2954 * Parses a DataTable object from gviz.
2955 * The data is expected to have a first column that is either a date or a
2956 * number. All subsequent columns must be numbers. If there is a clear mismatch
2957 * between this.xValueParser_ and the type of the first column, it will be
2958 * fixed. Fills out rawData_.
2959 * @param {!google.visualization.DataTable} data See above.
2962 Dygraph
.prototype.parseDataTable_
= function(data
) {
2963 var shortTextForAnnotationNum
= function(num
) {
2964 // converts [0-9]+ [A-Z][a-z]*
2965 // example: 0=A, 1=B, 25=Z, 26=Aa, 27=Ab
2966 // and continues like.. Ba Bb .. Za .. Zz..Aaa...Zzz Aaaa Zzzz
2967 var shortText
= String
.fromCharCode(65 /* A */ + num
% 26);
2968 num
= Math
.floor(num
/ 26);
2970 shortText
= String
.fromCharCode(65 /* A */ + (num
- 1) % 26 ) + shortText
.toLowerCase();
2971 num
= Math
.floor((num
- 1) / 26);
2976 var cols
= data
.getNumberOfColumns();
2977 var rows
= data
.getNumberOfRows();
2979 var indepType
= data
.getColumnType(0);
2980 if (indepType
== 'date' || indepType
== 'datetime') {
2981 this.attrs_
.xValueParser
= utils
.dateParser
;
2982 this.attrs_
.axes
.x
.valueFormatter
= utils
.dateValueFormatter
;
2983 this.attrs_
.axes
.x
.ticker
= DygraphTickers
.dateTicker
;
2984 this.attrs_
.axes
.x
.axisLabelFormatter
= utils
.dateAxisLabelFormatter
;
2985 } else if (indepType
== 'number') {
2986 this.attrs_
.xValueParser
= function(x
) { return parseFloat(x
); };
2987 this.attrs_
.axes
.x
.valueFormatter
= function(x
) { return x
; };
2988 this.attrs_
.axes
.x
.ticker
= DygraphTickers
.numericTicks
;
2989 this.attrs_
.axes
.x
.axisLabelFormatter
= this.attrs_
.axes
.x
.valueFormatter
;
2992 "only 'date', 'datetime' and 'number' types are supported " +
2993 "for column 1 of DataTable input (Got '" + indepType
+ "')");
2996 // Array of the column indices which contain data (and not annotations).
2998 var annotationCols
= {}; // data index -> [annotation cols]
2999 var hasAnnotations
= false;
3001 for (i
= 1; i
< cols
; i
++) {
3002 var type
= data
.getColumnType(i
);
3003 if (type
== 'number') {
3005 } else if (type
== 'string' && this.getBooleanOption('displayAnnotations')) {
3006 // This is OK -- it's an annotation column.
3007 var dataIdx
= colIdx
[colIdx
.length
- 1];
3008 if (!annotationCols
.hasOwnProperty(dataIdx
)) {
3009 annotationCols
[dataIdx
] = [i
];
3011 annotationCols
[dataIdx
].push(i
);
3013 hasAnnotations
= true;
3016 "Only 'number' is supported as a dependent type with Gviz." +
3017 " 'string' is only supported if displayAnnotations is true");
3021 // Read column labels
3022 // TODO(danvk): add support back for errorBars
3023 var labels
= [data
.getColumnLabel(0)];
3024 for (i
= 0; i
< colIdx
.length
; i
++) {
3025 labels
.push(data
.getColumnLabel(colIdx
[i
]));
3026 if (this.getBooleanOption("errorBars")) i
+= 1;
3028 this.attrs_
.labels
= labels
;
3029 cols
= labels
.length
;
3032 var outOfOrder
= false;
3033 var annotations
= [];
3034 for (i
= 0; i
< rows
; i
++) {
3036 if (typeof(data
.getValue(i
, 0)) === 'undefined' ||
3037 data
.getValue(i
, 0) === null) {
3038 console
.warn("Ignoring row " + i
+
3039 " of DataTable because of undefined or null first column.");
3043 if (indepType
== 'date' || indepType
== 'datetime') {
3044 row
.push(data
.getValue(i
, 0).getTime());
3046 row
.push(data
.getValue(i
, 0));
3048 if (!this.getBooleanOption("errorBars")) {
3049 for (j
= 0; j
< colIdx
.length
; j
++) {
3050 var col
= colIdx
[j
];
3051 row
.push(data
.getValue(i
, col
));
3052 if (hasAnnotations
&&
3053 annotationCols
.hasOwnProperty(col
) &&
3054 data
.getValue(i
, annotationCols
[col
][0]) !== null) {
3056 ann
.series
= data
.getColumnLabel(col
);
3058 ann
.shortText
= shortTextForAnnotationNum(annotations
.length
);
3060 for (var k
= 0; k
< annotationCols
[col
].length
; k
++) {
3061 if (k
) ann
.text
+= "\n";
3062 ann
.text
+= data
.getValue(i
, annotationCols
[col
][k
]);
3064 annotations
.push(ann
);
3068 // Strip out infinities, which give dygraphs problems later on.
3069 for (j
= 0; j
< row
.length
; j
++) {
3070 if (!isFinite(row
[j
])) row
[j
] = null;
3073 for (j
= 0; j
< cols
- 1; j
++) {
3074 row
.push([ data
.getValue(i
, 1 + 2 * j
), data
.getValue(i
, 2 + 2 * j
) ]);
3077 if (ret
.length
> 0 && row
[0] < ret
[ret
.length
- 1][0]) {
3084 console
.warn("DataTable is out of order; order it correctly to speed loading.");
3085 ret
.sort(function(a
,b
) { return a
[0] - b
[0]; });
3087 this.rawData_
= ret
;
3089 if (annotations
.length
> 0) {
3090 this.setAnnotations(annotations
, true);
3092 this.attributes_
.reparseSeries();
3096 * Signals to plugins that the chart data has updated.
3097 * This happens after the data has updated but before the chart has redrawn.
3099 Dygraph
.prototype.cascadeDataDidUpdateEvent_
= function() {
3100 // TODO(danvk): there are some issues checking xAxisRange() and using
3101 // toDomCoords from handlers of this event. The visible range should be set
3102 // when the chart is drawn, not derived from the data.
3103 this.cascadeEvents_('dataDidUpdate', {});
3107 * Get the CSV data. If it's in a function, call that function. If it's in a
3108 * file, do an XMLHttpRequest to get it.
3111 Dygraph
.prototype.start_
= function() {
3112 var data
= this.file_
;
3114 // Functions can return references of all other types.
3115 if (typeof data
== 'function') {
3119 if (utils
.isArrayLike(data
)) {
3120 this.rawData_
= this.parseArray_(data
);
3121 this.cascadeDataDidUpdateEvent_();
3123 } else if (typeof data
== 'object' &&
3124 typeof data
.getColumnRange
== 'function') {
3125 // must be a DataTable from gviz.
3126 this.parseDataTable_(data
);
3127 this.cascadeDataDidUpdateEvent_();
3129 } else if (typeof data
== 'string') {
3130 // Heuristic: a newline means it's CSV data. Otherwise it's an URL.
3131 var line_delimiter
= utils
.detectLineDelimiter(data
);
3132 if (line_delimiter
) {
3133 this.loadedEvent_(data
);
3137 if (window
.XMLHttpRequest
) {
3138 // Firefox, Opera, IE7, and other browsers will use the native object
3139 req
= new XMLHttpRequest();
3141 // IE 5 and 6 will use the ActiveX control
3142 req
= new ActiveXObject("Microsoft.XMLHTTP");
3146 req
.onreadystatechange
= function () {
3147 if (req
.readyState
== 4) {
3148 if (req
.status
=== 200 || // Normal http
3149 req
.status
=== 0) { // Chrome w/ --allow
-file
-access
-from
-files
3150 caller
.loadedEvent_(req
.responseText
);
3155 req
.open("GET", data
, true);
3159 console
.error("Unknown data format: " + (typeof data
));
3164 * Changes various properties of the graph. These can include:
3166 * <li>file: changes the source data for the graph</li>
3167 * <li>errorBars: changes whether the data contains stddev</li>
3170 * There's a huge variety of options that can be passed to this method. For a
3171 * full list, see http://dygraphs.com/options.html.
3173 * @param {Object} input_attrs The new properties and values
3174 * @param {boolean} block_redraw Usually the chart is redrawn after every
3175 * call to updateOptions(). If you know better, you can pass true to
3176 * explicitly block the redraw. This can be useful for chaining
3177 * updateOptions() calls, avoiding the occasional infinite loop and
3178 * preventing redraws when it's not necessary (e.g. when updating a
3181 Dygraph
.prototype.updateOptions
= function(input_attrs
, block_redraw
) {
3182 if (typeof(block_redraw
) == 'undefined') block_redraw
= false;
3184 // copyUserAttrs_ drops the "file" parameter as a convenience to us.
3185 var file
= input_attrs
.file
;
3186 var attrs
= Dygraph
.copyUserAttrs_(input_attrs
);
3188 // TODO(danvk): this is a mess. Move these options into attr_.
3189 if ('rollPeriod' in attrs
) {
3190 this.rollPeriod_
= attrs
.rollPeriod
;
3192 if ('dateWindow' in attrs
) {
3193 this.dateWindow_
= attrs
.dateWindow
;
3194 if (!('isZoomedIgnoreProgrammaticZoom' in attrs
)) {
3195 this.zoomed_x_
= (attrs
.dateWindow
!== null);
3198 if ('valueRange' in attrs
&& !('isZoomedIgnoreProgrammaticZoom' in attrs
)) {
3199 this.zoomed_y_
= (attrs
.valueRange
!== null);
3202 // TODO(danvk): validate per-series options.
3207 // highlightCircleSize
3209 // Check if this set options will require new points.
3210 var requiresNewPoints
= utils
.isPixelChangingOptionList(this.attr_("labels"), attrs
);
3212 utils
.updateDeep(this.user_attrs_
, attrs
);
3214 this.attributes_
.reparseSeries();
3217 // This event indicates that the data is about to change, but hasn't yet.
3218 // TODO(danvk): support cancelation of the update via this event.
3219 this.cascadeEvents_('dataWillUpdate', {});
3222 if (!block_redraw
) this.start_();
3224 if (!block_redraw
) {
3225 if (requiresNewPoints
) {
3228 this.renderGraph_(false);
3235 * Make a copy of input attributes, removing file as a convenience.
3237 Dygraph
.copyUserAttrs_
= function(attrs
) {
3239 for (var k
in attrs
) {
3240 if (!attrs
.hasOwnProperty(k
)) continue;
3241 if (k
== 'file') continue;
3242 if (attrs
.hasOwnProperty(k
)) my_attrs
[k
] = attrs
[k
];
3248 * Resizes the dygraph. If no parameters are specified, resizes to fill the
3249 * containing div (which has presumably changed size since the dygraph was
3250 * instantiated. If the width/height are specified, the div will be resized.
3252 * This is far more efficient than destroying and re-instantiating a
3253 * Dygraph, since it doesn't have to reparse the underlying data.
3255 * @param {number} width Width (in pixels)
3256 * @param {number} height Height (in pixels)
3258 Dygraph
.prototype.resize
= function(width
, height
) {
3259 if (this.resize_lock
) {
3262 this.resize_lock
= true;
3264 if ((width
=== null) != (height
=== null)) {
3265 console
.warn("Dygraph.resize() should be called with zero parameters or " +
3266 "two non-NULL parameters. Pretending it was zero.");
3267 width
= height
= null;
3270 var old_width
= this.width_
;
3271 var old_height
= this.height_
;
3274 this.maindiv_
.style
.width
= width
+ "px";
3275 this.maindiv_
.style
.height
= height
+ "px";
3276 this.width_
= width
;
3277 this.height_
= height
;
3279 this.width_
= this.maindiv_
.clientWidth
;
3280 this.height_
= this.maindiv_
.clientHeight
;
3283 if (old_width
!= this.width_
|| old_height
!= this.height_
) {
3284 // Resizing a canvas erases it, even when the size doesn't change, so
3285 // any resize needs to be followed by a redraw.
3286 this.resizeElements_();
3290 this.resize_lock
= false;
3294 * Adjusts the number of points in the rolling average. Updates the graph to
3295 * reflect the new averaging period.
3296 * @param {number} length Number of points over which to average the data.
3298 Dygraph
.prototype.adjustRoll
= function(length
) {
3299 this.rollPeriod_
= length
;
3304 * Returns a boolean array of visibility statuses.
3306 Dygraph
.prototype.visibility
= function() {
3307 // Do lazy-initialization, so that this happens after we know the number of
3309 if (!this.getOption("visibility")) {
3310 this.attrs_
.visibility
= [];
3312 // TODO(danvk): it looks like this could go into an infinite loop w/ user_attrs
.
3313 while (this.getOption("visibility").length
< this.numColumns() - 1) {
3314 this.attrs_
.visibility
.push(true);
3316 return this.getOption("visibility");
3320 * Changes the visibility of one or more series.
3322 * @param {number|number[]|object} num the series index or an array of series indices
3323 * or a boolean array of visibility states by index
3324 * or an object mapping series numbers, as keys, to
3325 * visibility state (boolean values)
3326 * @param {boolean} value the visibility state expressed as a boolean
3328 Dygraph
.prototype.setVisibility
= function(num
, value
) {
3329 var x
= this.visibility();
3330 var numIsObject
= false;
3332 if (!Array
.isArray(num
)) {
3333 if (num
!== null && typeof num
=== 'object') {
3341 for (var i
in num
) {
3342 if (num
.hasOwnProperty(i
)) {
3343 if (i
< 0 || i
>= x
.length
) {
3344 console
.warn("Invalid series number in setVisibility: " + i
);
3351 for (var i
= 0; i
< num
.length
; i
++) {
3352 if (typeof num
[i
] === 'boolean') {
3353 if (i
>= x
.length
) {
3354 console
.warn("Invalid series number in setVisibility: " + i
);
3359 if (num
[i
] < 0 || num
[i
] >= x
.length
) {
3360 console
.warn("Invalid series number in setVisibility: " + num
[i
]);
3372 * How large of an area will the dygraph render itself in?
3373 * This is used for testing.
3374 * @return A {width: w, height: h} object.
3377 Dygraph
.prototype.size
= function() {
3378 return { width
: this.width_
, height
: this.height_
};
3382 * Update the list of annotations and redraw the chart.
3383 * See dygraphs.com/annotations.html for more info on how to use annotations.
3384 * @param ann {Array} An array of annotation objects.
3385 * @param suppressDraw {Boolean} Set to "true" to block chart redraw (optional).
3387 Dygraph
.prototype.setAnnotations
= function(ann
, suppressDraw
) {
3388 // Only add the annotation CSS rule once we know it will be used.
3389 Dygraph
.addAnnotationRule();
3390 this.annotations_
= ann
;
3391 if (!this.layout_
) {
3392 console
.warn("Tried to setAnnotations before dygraph was ready. " +
3393 "Try setting them in a ready() block. See " +
3394 "dygraphs.com/tests/annotation.html");
3398 this.layout_
.setAnnotations(this.annotations_
);
3399 if (!suppressDraw
) {
3405 * Return the list of annotations.
3407 Dygraph
.prototype.annotations
= function() {
3408 return this.annotations_
;
3412 * Get the list of label names for this graph. The first column is the
3413 * x-axis, so the data series names start at index 1.
3415 * Returns null when labels have not yet been defined.
3417 Dygraph
.prototype.getLabels
= function() {
3418 var labels
= this.attr_("labels");
3419 return labels
? labels
.slice() : null;
3423 * Get the index of a series (column) given its name. The first column is the
3424 * x-axis, so the data series start with index 1.
3426 Dygraph
.prototype.indexFromSetName
= function(name
) {
3427 return this.setIndexByName_
[name
];
3431 * Find the row number corresponding to the given x-value.
3432 * Returns null if there is no such x-value in the data.
3433 * If there are multiple rows with the same x-value, this will return the
3435 * @param {number} xVal The x-value to look for (e.g. millis since epoch).
3436 * @return {?number} The row number, which you can pass to getValue(), or null.
3438 Dygraph
.prototype.getRowForX
= function(xVal
) {
3440 high
= this.numRows() - 1;
3442 while (low
<= high
) {
3443 var idx
= (high
+ low
) >> 1;
3444 var x
= this.getValue(idx
, 0);
3447 } else if (x
> xVal
) {
3449 } else if (low
!= idx
) { // equal, but there may be an earlier match.
3460 * Trigger a callback when the dygraph has drawn itself and is ready to be
3461 * manipulated. This is primarily useful when dygraphs has to do an XHR for the
3462 * data (i.e. a URL is passed as the data source) and the chart is drawn
3463 * asynchronously. If the chart has already drawn, the callback will fire
3466 * This is a good place to call setAnnotation().
3468 * @param {function(!Dygraph)} callback The callback to trigger when the chart
3471 Dygraph
.prototype.ready
= function(callback
) {
3472 if (this.is_initial_draw_
) {
3473 this.readyFns_
.push(callback
);
3475 callback
.call(this, this);
3481 * Adds a default style for the annotation CSS classes to the document. This is
3482 * only executed when annotations are actually used. It is designed to only be
3483 * called once -- all calls after the first will return immediately.
3485 Dygraph
.addAnnotationRule
= function() {
3486 // TODO(danvk): move this function into plugins/annotations.js
?
3487 if (Dygraph
.addedAnnotationCSS
) return;
3489 var rule
= "border: 1px solid black; " +
3490 "background-color: white; " +
3491 "text-align: center;";
3493 var styleSheetElement
= document
.createElement("style");
3494 styleSheetElement
.type
= "text/css";
3495 document
.getElementsByTagName("head")[0].appendChild(styleSheetElement
);
3497 // Find the first style sheet that we can access.
3498 // We may not add a rule to a style sheet from another domain for security
3499 // reasons. This sometimes comes up when using gviz, since the Google gviz JS
3500 // adds its own style sheets from google.com.
3501 for (var i
= 0; i
< document
.styleSheets
.length
; i
++) {
3502 if (document
.styleSheets
[i
].disabled
) continue;
3503 var mysheet
= document
.styleSheets
[i
];
3505 if (mysheet
.insertRule
) { // Firefox
3506 var idx
= mysheet
.cssRules
? mysheet
.cssRules
.length
: 0;
3507 mysheet
.insertRule(".dygraphDefaultAnnotation { " + rule
+ " }", idx
);
3508 } else if (mysheet
.addRule
) { // IE
3509 mysheet
.addRule(".dygraphDefaultAnnotation", rule
);
3511 Dygraph
.addedAnnotationCSS
= true;
3514 // Was likely a security exception.
3518 console
.warn("Unable to add default annotation CSS rule; display may be off.");
3522 * Add an event handler. This event handler is kept until the graph is
3523 * destroyed with a call to graph.destroy().
3525 * @param {!Node} elem The element to add the event to.
3526 * @param {string} type The type of the event, e.g. 'click' or 'mousemove'.
3527 * @param {function(Event):(boolean|undefined)} fn The function to call
3528 * on the event. The function takes one parameter: the event object.
3531 Dygraph
.prototype.addAndTrackEvent
= function(elem
, type
, fn
) {
3532 utils
.addEvent(elem
, type
, fn
);
3533 this.registeredEvents_
.push({elem
, type
, fn
});
3536 Dygraph
.prototype.removeTrackedEvents_
= function() {
3537 if (this.registeredEvents_
) {
3538 for (var idx
= 0; idx
< this.registeredEvents_
.length
; idx
++) {
3539 var reg
= this.registeredEvents_
[idx
];
3540 utils
.removeEvent(reg
.elem
, reg
.type
, reg
.fn
);
3544 this.registeredEvents_
= [];
3548 // Installed plugins, in order of precedence (most-general to most-specific).
3552 RangeSelectorPlugin
, // Has to be before ChartLabels so that its callbacks are called after ChartLabels' callbacks.
3558 // There are many symbols which have historically been available through the
3559 // Dygraph class. These are exported here for backwards compatibility.
3560 Dygraph
.GVizChart
= GVizChart
;
3561 Dygraph
.DASHED_LINE
= utils
.DASHED_LINE
;
3562 Dygraph
.DOT_DASH_LINE
= utils
.DOT_DASH_LINE
;
3563 Dygraph
.dateAxisLabelFormatter
= utils
.dateAxisLabelFormatter
;
3564 Dygraph
.toRGB_
= utils
.toRGB_
;
3565 Dygraph
.findPos
= utils
.findPos
;
3566 Dygraph
.pageX
= utils
.pageX
;
3567 Dygraph
.pageY
= utils
.pageY
;
3568 Dygraph
.dateString_
= utils
.dateString_
;
3569 Dygraph
.defaultInteractionModel
= DygraphInteraction
.defaultModel
;
3570 Dygraph
.nonInteractiveModel
= Dygraph
.nonInteractiveModel_
= DygraphInteraction
.nonInteractiveModel_
;
3571 Dygraph
.Circles
= utils
.Circles
;
3574 Legend
: LegendPlugin
,
3576 Annotations
: AnnotationsPlugin
,
3577 ChartLabels
: ChartLabelsPlugin
,
3579 RangeSelector
: RangeSelectorPlugin
3582 Dygraph
.DataHandlers
= {
3586 DefaultFractionHandler
,
3588 FractionsBarsHandler
3591 Dygraph
.startPan
= DygraphInteraction
.startPan
;
3592 Dygraph
.startZoom
= DygraphInteraction
.startZoom
;
3593 Dygraph
.movePan
= DygraphInteraction
.movePan
;
3594 Dygraph
.moveZoom
= DygraphInteraction
.moveZoom
;
3595 Dygraph
.endPan
= DygraphInteraction
.endPan
;
3596 Dygraph
.endZoom
= DygraphInteraction
.endZoom
;
3598 Dygraph
.numericLinearTicks
= DygraphTickers
.numericLinearTicks
;
3599 Dygraph
.numericTicks
= DygraphTickers
.numericTicks
;
3600 Dygraph
.dateTicker
= DygraphTickers
.dateTicker
;
3601 Dygraph
.Granularity
= DygraphTickers
.Granularity
;
3602 Dygraph
.getDateAxis
= DygraphTickers
.getDateAxis
;
3603 Dygraph
.floatFormat
= utils
.floatFormat
;
3605 export default Dygraph
;