1 // Copyright 2006 Dan Vanderkam (danvdk@gmail.com)
2 // All Rights Reserved.
5 * @fileoverview Creates an interactive, zoomable graph based on a CSV file or
6 * string. Dygraph can handle multiple series with or without error bars. The
7 * date/value ranges will be automatically set. Dygraph uses the
8 * <canvas> tag, so it only works in FF1.5+.
9 * @author danvdk@gmail.com (Dan Vanderkam)
12 <div id="graphdiv" style="width:800px; height:500px;"></div>
13 <script type="text/javascript">
14 new Dygraph(document.getElementById("graphdiv"),
15 "datafile.csv", // CSV file with headers
19 The CSV file is of the form
21 Date,SeriesA,SeriesB,SeriesC
25 If the 'errorBars' option is set in the constructor, the input should be of
28 Date,SeriesA,SeriesB,...
29 YYYYMMDD,A1,sigmaA1,B1,sigmaB1,...
30 YYYYMMDD,A2,sigmaA2,B2,sigmaB2,...
32 If the 'fractions' option is set, the input should be of the form:
34 Date,SeriesA,SeriesB,...
35 YYYYMMDD,A1/B1,A2/B2,...
36 YYYYMMDD,A1/B1,A2/B2,...
38 And error bars will be calculated automatically using a binomial distribution.
40 For further documentation and examples, see http://www.danvk.org/dygraphs
45 * An interactive, zoomable graph
46 * @param {String | Function} file A file containing CSV data or a function that
47 * returns this data. The expected format for each line is
48 * YYYYMMDD,val1,val2,... or, if attrs.errorBars is set,
49 * YYYYMMDD,val1,stddev1,val2,stddev2,...
50 * @param {Object} attrs Various other attributes, e.g. errorBars determines
51 * whether the input data contains error ranges.
53 Dygraph
= function(div
, data
, opts
) {
54 if (arguments
.length
> 0) {
55 if (arguments
.length
== 4) {
56 // Old versions of dygraphs took in the series labels as a constructor
57 // parameter. This doesn't make sense anymore, but it's easy to continue
58 // to support this usage.
59 this.warn("Using deprecated four-argument dygraph constructor");
60 this.__old_init__(div
, data
, arguments
[2], arguments
[3]);
62 this.__init__(div
, data
, opts
);
67 Dygraph
.NAME
= "Dygraph";
68 Dygraph
.VERSION
= "1.2";
69 Dygraph
.__repr__
= function() {
70 return "[" + this.NAME
+ " " + this.VERSION
+ "]";
72 Dygraph
.toString
= function() {
73 return this.__repr__();
76 // Various default values
77 Dygraph
.DEFAULT_ROLL_PERIOD
= 1;
78 Dygraph
.DEFAULT_WIDTH
= 480;
79 Dygraph
.DEFAULT_HEIGHT
= 320;
80 Dygraph
.AXIS_LINE_WIDTH
= 0.3;
82 // Default attribute values.
83 Dygraph
.DEFAULT_ATTRS
= {
84 highlightCircleSize
: 3,
90 // TODO(danvk): move defaults from createStatusMessage_ here.
92 labelsSeparateLines
: false,
93 labelsShowZeroValues
: true,
96 showLabelsOnHighlight
: true,
98 yValueFormatter
: function(x
) { return Dygraph
.round_(x
, 2); },
103 axisLabelFontSize
: 14,
106 xAxisLabelFormatter
: Dygraph
.dateAxisFormatter
,
110 xValueFormatter
: Dygraph
.dateString_
,
111 xValueParser
: Dygraph
.dateParser
,
112 xTicker
: Dygraph
.dateTicker
,
120 wilsonInterval
: true, // only relevant if fractions is true
124 connectSeparatedPoints
: false,
127 hideOverlayOnMouseOut
: true,
133 // Various logging levels.
139 // Directions for panning and zooming. Use bit operations when combined
140 // values are possible.
141 Dygraph
.HORIZONTAL
= 1;
142 Dygraph
.VERTICAL
= 2;
144 // Used for initializing annotation CSS rules only once.
145 Dygraph
.addedAnnotationCSS
= false;
147 Dygraph
.prototype.__old_init__
= function(div
, file
, labels
, attrs
) {
148 // Labels is no longer a constructor parameter, since it's typically set
149 // directly from the data source. It also conains a name for the x-axis,
150 // which the previous constructor form did not.
151 if (labels
!= null) {
152 var new_labels
= ["Date"];
153 for (var i
= 0; i
< labels
.length
; i
++) new_labels
.push(labels
[i
]);
154 Dygraph
.update(attrs
, { 'labels': new_labels
});
156 this.__init__(div
, file
, attrs
);
160 * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit
161 * and interaction <canvas> inside of it. See the constructor for details
163 * @param {Element} div the Element to render the graph into.
164 * @param {String | Function} file Source data
165 * @param {Object} attrs Miscellaneous other options
168 Dygraph
.prototype.__init__
= function(div
, file
, attrs
) {
169 // Hack for IE: if we're using excanvas and the document hasn't finished
170 // loading yet (and hence may not have initialized whatever it needs to
171 // initialize), then keep calling this routine periodically until it has.
172 if (/MSIE/.test(navigator
.userAgent
) && !window
.opera
&&
173 typeof(G_vmlCanvasManager
) != 'undefined' &&
174 document
.readyState
!= 'complete') {
176 setTimeout(function() { self
.__init__(div
, file
, attrs
) }, 100);
179 // Support two-argument constructor
180 if (attrs
== null) { attrs
= {}; }
182 // Copy the important bits into the object
183 // TODO(danvk): most of these should just stay in the attrs_ dictionary.
186 this.rollPeriod_
= attrs
.rollPeriod
|| Dygraph
.DEFAULT_ROLL_PERIOD
;
187 this.previousVerticalX_
= -1;
188 this.fractions_
= attrs
.fractions
|| false;
189 this.dateWindow_
= attrs
.dateWindow
|| null;
191 this.wilsonInterval_
= attrs
.wilsonInterval
|| true;
192 this.is_initial_draw_
= true;
193 this.annotations_
= [];
195 // Zoomed indicators - These indicate when the graph has been zoomed and on what axis.
196 this.zoomed_x_
= false;
197 this.zoomed_y_
= false;
199 // Clear the div. This ensure that, if multiple dygraphs are passed the same
200 // div, then only one will be drawn.
203 // If the div isn't already sized then inherit from our attrs or
204 // give it a default size.
205 if (div
.style
.width
== '') {
206 div
.style
.width
= (attrs
.width
|| Dygraph
.DEFAULT_WIDTH
) + "px";
208 if (div
.style
.height
== '') {
209 div
.style
.height
= (attrs
.height
|| Dygraph
.DEFAULT_HEIGHT
) + "px";
211 this.width_
= parseInt(div
.style
.width
, 10);
212 this.height_
= parseInt(div
.style
.height
, 10);
213 // The div might have been specified as percent of the current window size,
214 // convert that to an appropriate number of pixels.
215 if (div
.style
.width
.indexOf("%") == div
.style
.width
.length
- 1) {
216 this.width_
= div
.offsetWidth
;
218 if (div
.style
.height
.indexOf("%") == div
.style
.height
.length
- 1) {
219 this.height_
= div
.offsetHeight
;
222 if (this.width_
== 0) {
223 this.error("dygraph has zero width. Please specify a width in pixels.");
225 if (this.height_
== 0) {
226 this.error("dygraph has zero height. Please specify a height in pixels.");
229 // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_.
230 if (attrs
['stackedGraph']) {
231 attrs
['fillGraph'] = true;
232 // TODO(nikhilk): Add any other stackedGraph checks here.
235 // Dygraphs has many options, some of which interact with one another.
236 // To keep track of everything, we maintain two sets of options:
238 // this.user_attrs_ only options explicitly set by the user.
239 // this.attrs_ defaults, options derived from user_attrs_, data.
241 // Options are then accessed this.attr_('attr'), which first looks at
242 // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent
243 // defaults without overriding behavior that the user specifically asks for.
244 this.user_attrs_
= {};
245 Dygraph
.update(this.user_attrs_
, attrs
);
248 Dygraph
.update(this.attrs_
, Dygraph
.DEFAULT_ATTRS
);
250 this.boundaryIds_
= [];
252 // Make a note of whether labels will be pulled from the CSV file.
253 this.labelsFromCSV_
= (this.attr_("labels") == null);
255 // Create the containing DIV and other interactive elements
256 this.createInterface_();
261 // axis is an optional parameter. Can be set to 'x' or 'y'.
262 Dygraph
.prototype.isZoomed
= function(axis
) {
263 if (axis
== null) return this.zoomed_x_
|| this.zoomed_y_
;
264 if (axis
== 'x') return this.zoomed_x_
;
265 if (axis
== 'y') return this.zoomed_y_
;
266 throw "axis parameter to Dygraph.isZoomed must be missing, 'x' or 'y'.";
269 Dygraph
.prototype.attr_
= function(name
, seriesName
) {
271 typeof(this.user_attrs_
[seriesName
]) != 'undefined' &&
272 this.user_attrs_
[seriesName
] != null &&
273 typeof(this.user_attrs_
[seriesName
][name
]) != 'undefined') {
274 return this.user_attrs_
[seriesName
][name
];
275 } else if (typeof(this.user_attrs_
[name
]) != 'undefined') {
276 return this.user_attrs_
[name
];
277 } else if (typeof(this.attrs_
[name
]) != 'undefined') {
278 return this.attrs_
[name
];
284 // TODO(danvk): any way I can get the line numbers to be this.warn call?
285 Dygraph
.prototype.log
= function(severity
, message
) {
286 if (typeof(console
) != 'undefined') {
289 console
.debug('dygraphs: ' + message
);
292 console
.info('dygraphs: ' + message
);
294 case Dygraph
.WARNING
:
295 console
.warn('dygraphs: ' + message
);
298 console
.error('dygraphs: ' + message
);
303 Dygraph
.prototype.info
= function(message
) {
304 this.log(Dygraph
.INFO
, message
);
306 Dygraph
.prototype.warn
= function(message
) {
307 this.log(Dygraph
.WARNING
, message
);
309 Dygraph
.prototype.error
= function(message
) {
310 this.log(Dygraph
.ERROR
, message
);
314 * Returns the current rolling period, as set by the user or an option.
315 * @return {Number} The number of days in the rolling window
317 Dygraph
.prototype.rollPeriod
= function() {
318 return this.rollPeriod_
;
322 * Returns the currently-visible x-range. This can be affected by zooming,
323 * panning or a call to updateOptions.
324 * Returns a two-element array: [left, right].
325 * If the Dygraph has dates on the x-axis, these will be millis since epoch.
327 Dygraph
.prototype.xAxisRange
= function() {
328 if (this.dateWindow_
) return this.dateWindow_
;
330 // The entire chart is visible.
331 var left
= this.rawData_
[0][0];
332 var right
= this.rawData_
[this.rawData_
.length
- 1][0];
333 return [left
, right
];
337 * Returns the currently-visible y-range for an axis. This can be affected by
338 * zooming, panning or a call to updateOptions. Axis indices are zero-based. If
339 * called with no arguments, returns the range of the first axis.
340 * Returns a two-element array: [bottom, top].
342 Dygraph
.prototype.yAxisRange
= function(idx
) {
343 if (typeof(idx
) == "undefined") idx
= 0;
344 if (idx
< 0 || idx
>= this.axes_
.length
) return null;
345 return [ this.axes_
[idx
].computedValueRange
[0],
346 this.axes_
[idx
].computedValueRange
[1] ];
350 * Returns the currently-visible y-ranges for each axis. This can be affected by
351 * zooming, panning, calls to updateOptions, etc.
352 * Returns an array of [bottom, top] pairs, one for each y-axis.
354 Dygraph
.prototype.yAxisRanges
= function() {
356 for (var i
= 0; i
< this.axes_
.length
; i
++) {
357 ret
.push(this.yAxisRange(i
));
362 // TODO(danvk): use these functions throughout dygraphs.
364 * Convert from data coordinates to canvas/div X/Y coordinates.
365 * If specified, do this conversion for the coordinate system of a particular
366 * axis. Uses the first axis by default.
367 * Returns a two-element array: [X, Y]
369 Dygraph
.prototype.toDomCoords
= function(x
, y
, axis
) {
370 var ret
= [null, null];
371 var area
= this.plotter_
.area
;
373 var xRange
= this.xAxisRange();
374 ret
[0] = area
.x
+ (x
- xRange
[0]) / (xRange
[1] - xRange
[0]) * area
.w
;
378 var yRange
= this.yAxisRange(axis
);
379 ret
[1] = area
.y
+ (yRange
[1] - y
) / (yRange
[1] - yRange
[0]) * area
.h
;
386 * Convert from canvas/div coords to data coordinates.
387 * If specified, do this conversion for the coordinate system of a particular
388 * axis. Uses the first axis by default.
389 * Returns a two-element array: [X, Y]
391 Dygraph
.prototype.toDataCoords
= function(x
, y
, axis
) {
392 var ret
= [null, null];
393 var area
= this.plotter_
.area
;
395 var xRange
= this.xAxisRange();
396 ret
[0] = xRange
[0] + (x
- area
.x
) / area
.w
* (xRange
[1] - xRange
[0]);
400 var yRange
= this.yAxisRange(axis
);
401 ret
[1] = yRange
[0] + (area
.h
- y
) / area
.h
* (yRange
[1] - yRange
[0]);
408 * Returns the number of columns (including the independent variable).
410 Dygraph
.prototype.numColumns
= function() {
411 return this.rawData_
[0].length
;
415 * Returns the number of rows (excluding any header/label row).
417 Dygraph
.prototype.numRows
= function() {
418 return this.rawData_
.length
;
422 * Returns the value in the given row and column. If the row and column exceed
423 * the bounds on the data, returns null. Also returns null if the value is
426 Dygraph
.prototype.getValue
= function(row
, col
) {
427 if (row
< 0 || row
> this.rawData_
.length
) return null;
428 if (col
< 0 || col
> this.rawData_
[row
].length
) return null;
430 return this.rawData_
[row
][col
];
433 Dygraph
.addEvent
= function(el
, evt
, fn
) {
434 var normed_fn
= function(e
) {
435 if (!e
) var e
= window
.event
;
438 if (window
.addEventListener
) { // Mozilla, Netscape, Firefox
439 el
.addEventListener(evt
, normed_fn
, false);
441 el
.attachEvent('on' + evt
, normed_fn
);
446 * Generates interface elements for the Dygraph: a containing div, a div to
447 * display the current point, and a textbox to adjust the rolling average
448 * period. Also creates the Renderer/Layout elements.
451 Dygraph
.prototype.createInterface_
= function() {
452 // Create the all-enclosing graph div
453 var enclosing
= this.maindiv_
;
455 this.graphDiv
= document
.createElement("div");
456 this.graphDiv
.style
.width
= this.width_
+ "px";
457 this.graphDiv
.style
.height
= this.height_
+ "px";
458 enclosing
.appendChild(this.graphDiv
);
460 // Create the canvas for interactive parts of the chart.
461 this.canvas_
= Dygraph
.createCanvas();
462 this.canvas_
.style
.position
= "absolute";
463 this.canvas_
.width
= this.width_
;
464 this.canvas_
.height
= this.height_
;
465 this.canvas_
.style
.width
= this.width_
+ "px"; // for IE
466 this.canvas_
.style
.height
= this.height_
+ "px"; // for IE
468 // ... and for static parts of the chart.
469 this.hidden_
= this.createPlotKitCanvas_(this.canvas_
);
471 // The interactive parts of the graph are drawn on top of the chart.
472 this.graphDiv
.appendChild(this.hidden_
);
473 this.graphDiv
.appendChild(this.canvas_
);
474 this.mouseEventElement_
= this.canvas_
;
477 Dygraph
.addEvent(this.mouseEventElement_
, 'mousemove', function(e
) {
478 dygraph
.mouseMove_(e
);
480 Dygraph
.addEvent(this.mouseEventElement_
, 'mouseout', function(e
) {
481 dygraph
.mouseOut_(e
);
484 // Create the grapher
485 // TODO(danvk): why does the Layout need its own set of options?
486 this.layoutOptions_
= { 'xOriginIsZero': false };
487 Dygraph
.update(this.layoutOptions_
, this.attrs_
);
488 Dygraph
.update(this.layoutOptions_
, this.user_attrs_
);
489 Dygraph
.update(this.layoutOptions_
, {
490 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) });
492 this.layout_
= new DygraphLayout(this, this.layoutOptions_
);
494 // TODO(danvk): why does the Renderer need its own set of options?
495 this.renderOptions_
= { colorScheme
: this.colors_
,
497 axisLineWidth
: Dygraph
.AXIS_LINE_WIDTH
};
498 Dygraph
.update(this.renderOptions_
, this.attrs_
);
499 Dygraph
.update(this.renderOptions_
, this.user_attrs_
);
501 this.createStatusMessage_();
502 this.createDragInterface_();
506 * Detach DOM elements in the dygraph and null out all data references.
507 * Calling this when you're done with a dygraph can dramatically reduce memory
508 * usage. See, e.g., the tests/perf.html example.
510 Dygraph
.prototype.destroy
= function() {
511 var removeRecursive
= function(node
) {
512 while (node
.hasChildNodes()) {
513 removeRecursive(node
.firstChild
);
514 node
.removeChild(node
.firstChild
);
517 removeRecursive(this.maindiv_
);
519 var nullOut
= function(obj
) {
521 if (typeof(obj
[n
]) === 'object') {
527 // These may not all be necessary, but it can't hurt...
528 nullOut(this.layout_
);
529 nullOut(this.plotter_
);
534 * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on
535 * this particular canvas. All Dygraph work is done on this.canvas_.
536 * @param {Object} canvas The Dygraph canvas over which to overlay the plot
537 * @return {Object} The newly-created canvas
540 Dygraph
.prototype.createPlotKitCanvas_
= function(canvas
) {
541 var h
= Dygraph
.createCanvas();
542 h
.style
.position
= "absolute";
543 // TODO(danvk): h should be offset from canvas. canvas needs to include
544 // some extra area to make it easier to zoom in on the far left and far
545 // right. h needs to be precisely the plot area, so that clipping occurs.
546 h
.style
.top
= canvas
.style
.top
;
547 h
.style
.left
= canvas
.style
.left
;
548 h
.width
= this.width_
;
549 h
.height
= this.height_
;
550 h
.style
.width
= this.width_
+ "px"; // for IE
551 h
.style
.height
= this.height_
+ "px"; // for IE
555 // Taken from MochiKit.Color
556 Dygraph
.hsvToRGB
= function (hue
, saturation
, value
) {
560 if (saturation
=== 0) {
565 var i
= Math
.floor(hue
* 6);
566 var f
= (hue
* 6) - i
;
567 var p
= value
* (1 - saturation
);
568 var q
= value
* (1 - (saturation
* f
));
569 var t
= value
* (1 - (saturation
* (1 - f
)));
571 case 1: red
= q
; green
= value
; blue
= p
; break;
572 case 2: red
= p
; green
= value
; blue
= t
; break;
573 case 3: red
= p
; green
= q
; blue
= value
; break;
574 case 4: red
= t
; green
= p
; blue
= value
; break;
575 case 5: red
= value
; green
= p
; blue
= q
; break;
576 case 6: // fall through
577 case 0: red
= value
; green
= t
; blue
= p
; break;
580 red
= Math
.floor(255 * red
+ 0.5);
581 green
= Math
.floor(255 * green
+ 0.5);
582 blue
= Math
.floor(255 * blue
+ 0.5);
583 return 'rgb(' + red
+ ',' + green
+ ',' + blue
+ ')';
588 * Generate a set of distinct colors for the data series. This is done with a
589 * color wheel. Saturation/Value are customizable, and the hue is
590 * equally-spaced around the color wheel. If a custom set of colors is
591 * specified, that is used instead.
594 Dygraph
.prototype.setColors_
= function() {
595 // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do
596 // away with this.renderOptions_.
597 var num
= this.attr_("labels").length
- 1;
599 var colors
= this.attr_('colors');
601 var sat
= this.attr_('colorSaturation') || 1.0;
602 var val
= this.attr_('colorValue') || 0.5;
603 var half
= Math
.ceil(num
/ 2);
604 for (var i
= 1; i
<= num
; i
++) {
605 if (!this.visibility()[i
-1]) continue;
606 // alternate colors for high contrast.
607 var idx
= i
% 2 ? Math
.ceil(i
/ 2) : (half + i / 2);
608 var hue
= (1.0 * idx
/ (1 + num
));
609 this.colors_
.push(Dygraph
.hsvToRGB(hue
, sat
, val
));
612 for (var i
= 0; i
< num
; i
++) {
613 if (!this.visibility()[i
]) continue;
614 var colorStr
= colors
[i
% colors
.length
];
615 this.colors_
.push(colorStr
);
619 // TODO(danvk): update this w/r
/t/ the
new options system
.
620 this.renderOptions_
.colorScheme
= this.colors_
;
621 Dygraph
.update(this.plotter_
.options
, this.renderOptions_
);
622 Dygraph
.update(this.layoutOptions_
, this.user_attrs_
);
623 Dygraph
.update(this.layoutOptions_
, this.attrs_
);
627 * Return the list of colors. This is either the list of colors passed in the
628 * attributes, or the autogenerated list of rgb(r,g,b) strings.
629 * @return {Array<string>} The list of colors.
631 Dygraph
.prototype.getColors
= function() {
635 // The following functions are from quirksmode.org with a modification for Safari from
636 // http://blog.firetree.net/2005/07/04/javascript-find-position/
637 // http://www.quirksmode.org/js
/findpos
.html
638 Dygraph
.findPosX
= function(obj
) {
643 curleft
+= obj
.offsetLeft
;
644 if(!obj
.offsetParent
)
646 obj
= obj
.offsetParent
;
653 Dygraph
.findPosY
= function(obj
) {
658 curtop
+= obj
.offsetTop
;
659 if(!obj
.offsetParent
)
661 obj
= obj
.offsetParent
;
671 * Create the div that contains information on the selected point(s)
672 * This goes in the top right of the canvas, unless an external div has already
676 Dygraph
.prototype.createStatusMessage_
= function() {
677 var userLabelsDiv
= this.user_attrs_
["labelsDiv"];
678 if (userLabelsDiv
&& null != userLabelsDiv
679 && (typeof(userLabelsDiv
) == "string" || userLabelsDiv
instanceof String
)) {
680 this.user_attrs_
["labelsDiv"] = document
.getElementById(userLabelsDiv
);
682 if (!this.attr_("labelsDiv")) {
683 var divWidth
= this.attr_('labelsDivWidth');
685 "position": "absolute",
688 "width": divWidth
+ "px",
690 "left": (this.width_
- divWidth
- 2) + "px",
691 "background": "white",
693 "overflow": "hidden"};
694 Dygraph
.update(messagestyle
, this.attr_('labelsDivStyles'));
695 var div
= document
.createElement("div");
696 for (var name
in messagestyle
) {
697 if (messagestyle
.hasOwnProperty(name
)) {
698 div
.style
[name
] = messagestyle
[name
];
701 this.graphDiv
.appendChild(div
);
702 this.attrs_
.labelsDiv
= div
;
707 * Position the labels div so that its right edge is flush with the right edge
708 * of the charting area.
710 Dygraph
.prototype.positionLabelsDiv_
= function() {
711 // Don't touch a user-specified labelsDiv.
712 if (this.user_attrs_
.hasOwnProperty("labelsDiv")) return;
714 var area
= this.plotter_
.area
;
715 var div
= this.attr_("labelsDiv");
716 div
.style
.left
= area
.x
+ area
.w
- this.attr_("labelsDivWidth") - 1 + "px";
720 * Create the text box to adjust the averaging period
723 Dygraph
.prototype.createRollInterface_
= function() {
724 // Create a roller if one doesn't exist already.
726 this.roller_
= document
.createElement("input");
727 this.roller_
.type
= "text";
728 this.roller_
.style
.display
= "none";
729 this.graphDiv
.appendChild(this.roller_
);
732 var display
= this.attr_('showRoller') ? 'block' : 'none';
734 var textAttr
= { "position": "absolute",
736 "top": (this.plotter_
.area
.h
- 25) + "px",
737 "left": (this.plotter_
.area
.x
+ 1) + "px",
740 this.roller_
.size
= "2";
741 this.roller_
.value
= this.rollPeriod_
;
742 for (var name
in textAttr
) {
743 if (textAttr
.hasOwnProperty(name
)) {
744 this.roller_
.style
[name
] = textAttr
[name
];
749 this.roller_
.onchange
= function() { dygraph
.adjustRoll(dygraph
.roller_
.value
); };
752 // These functions are taken from MochiKit.Signal
753 Dygraph
.pageX
= function(e
) {
755 return (!e
.pageX
|| e
.pageX
< 0) ? 0 : e
.pageX
;
758 var b
= document
.body
;
760 (de
.scrollLeft
|| b
.scrollLeft
) -
761 (de
.clientLeft
|| 0);
765 Dygraph
.pageY
= function(e
) {
767 return (!e
.pageY
|| e
.pageY
< 0) ? 0 : e
.pageY
;
770 var b
= document
.body
;
772 (de
.scrollTop
|| b
.scrollTop
) -
778 * Set up all the mouse handlers needed to capture dragging behavior for zoom
782 Dygraph
.prototype.createDragInterface_
= function() {
785 // Tracks whether the mouse is down right now
786 var isZooming
= false;
787 var isPanning
= false; // is this drag part of a pan?
788 var is2DPan
= false; // if so, is that pan 1- or 2-dimensional?
789 var dragStartX
= null;
790 var dragStartY
= null;
793 var dragDirection
= null;
796 var prevDragDirection
= null;
798 // TODO(danvk): update this comment
799 // draggingDate and draggingValue represent the [date,value] point on the
800 // graph at which the mouse was pressed. As the mouse moves while panning,
801 // the viewport must pan so that the mouse position points to
802 // [draggingDate, draggingValue]
803 var draggingDate
= null;
805 // TODO(danvk): update this comment
806 // The range in second/value units that the viewport encompasses during a
807 // panning operation.
808 var dateRange
= null;
810 // Utility function to convert page-wide coordinates to canvas coords
813 var getX
= function(e
) { return Dygraph
.pageX(e
) - px
};
814 var getY
= function(e
) { return Dygraph
.pageY(e
) - py
};
816 // Draw zoom rectangles when the mouse is down and the user moves around
817 Dygraph
.addEvent(this.mouseEventElement_
, 'mousemove', function(event
) {
819 dragEndX
= getX(event
);
820 dragEndY
= getY(event
);
822 var xDelta
= Math
.abs(dragStartX
- dragEndX
);
823 var yDelta
= Math
.abs(dragStartY
- dragEndY
);
825 // drag direction threshold for y axis is twice as large as x axis
826 dragDirection
= (xDelta
< yDelta
/ 2) ? Dygraph
.VERTICAL
: Dygraph
.HORIZONTAL
;
828 self
.drawZoomRect_(dragDirection
, dragStartX
, dragEndX
, dragStartY
, dragEndY
,
829 prevDragDirection
, prevEndX
, prevEndY
);
833 prevDragDirection
= dragDirection
;
834 } else if (isPanning
) {
835 dragEndX
= getX(event
);
836 dragEndY
= getY(event
);
838 // TODO(danvk): update this comment
839 // Want to have it so that:
840 // 1. draggingDate appears at dragEndX, draggingValue appears at dragEndY.
841 // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered.
842 // 3. draggingValue appears at dragEndY.
843 // 4. valueRange is unaltered.
845 var minDate
= draggingDate
- (dragEndX
/ self
.width_
) * dateRange
;
846 var maxDate
= minDate
+ dateRange
;
847 self
.dateWindow_
= [minDate
, maxDate
];
850 // y-axis scaling is automatic unless this is a full 2D pan.
852 // Adjust each axis appropriately.
853 var y_frac
= dragEndY
/ self
.height_
;
854 for (var i
= 0; i
< self
.axes_
.length
; i
++) {
855 var axis
= self
.axes_
[i
];
856 var maxValue
= axis
.draggingValue
+ y_frac
* axis
.dragValueRange
;
857 var minValue
= maxValue
- axis
.dragValueRange
;
858 axis
.valueWindow
= [ minValue
, maxValue
];
866 // Track the beginning of drag events
867 Dygraph
.addEvent(this.mouseEventElement_
, 'mousedown', function(event
) {
868 // prevents mouse drags from selecting page text.
869 if (event
.preventDefault
) {
870 event
.preventDefault(); // Firefox, Chrome, etc.
872 event
.returnValue
= false; // IE
873 event
.cancelBubble
= true;
876 px
= Dygraph
.findPosX(self
.canvas_
);
877 py
= Dygraph
.findPosY(self
.canvas_
);
878 dragStartX
= getX(event
);
879 dragStartY
= getY(event
);
881 if (event
.altKey
|| event
.shiftKey
) {
882 // have to be zoomed in to pan.
884 for (var i
= 0; i
< self
.axes_
.length
; i
++) {
885 if (self
.axes_
[i
].valueWindow
|| self
.axes_
[i
].valueRange
) {
890 if (!self
.dateWindow_
&& !zoomedY
) return;
893 var xRange
= self
.xAxisRange();
894 dateRange
= xRange
[1] - xRange
[0];
896 // Record the range of each y-axis at the start of the drag.
897 // If any axis has a valueRange or valueWindow, then we want a 2D pan.
899 for (var i
= 0; i
< self
.axes_
.length
; i
++) {
900 var axis
= self
.axes_
[i
];
901 var yRange
= self
.yAxisRange(i
);
902 axis
.dragValueRange
= yRange
[1] - yRange
[0];
903 var r
= self
.toDataCoords(null, dragStartY
, i
);
904 axis
.draggingValue
= r
[1];
905 if (axis
.valueWindow
|| axis
.valueRange
) is2DPan
= true;
908 // TODO(konigsberg): Switch from all this math to toDataCoords?
909 // Seems to work for the dragging value.
910 draggingDate
= (dragStartX
/ self
.width_
) * dateRange
+ xRange
[0];
916 // If the user releases the mouse button during a drag, but not over the
917 // canvas, then it doesn't count as a zooming action.
918 Dygraph
.addEvent(document
, 'mouseup', function(event
) {
919 if (isZooming
|| isPanning
) {
929 for (var i
= 0; i
< self
.axes_
.length
; i
++) {
930 delete self
.axes_
[i
].draggingValue
;
931 delete self
.axes_
[i
].dragValueRange
;
936 // Temporarily cancel the dragging event when the mouse leaves the graph
937 Dygraph
.addEvent(this.mouseEventElement_
, 'mouseout', function(event
) {
944 // If the mouse is released on the canvas during a drag event, then it's a
945 // zoom. Only do the zoom if it's over a large enough area (>= 10 pixels)
946 Dygraph
.addEvent(this.mouseEventElement_
, 'mouseup', function(event
) {
949 dragEndX
= getX(event
);
950 dragEndY
= getY(event
);
951 var regionWidth
= Math
.abs(dragEndX
- dragStartX
);
952 var regionHeight
= Math
.abs(dragEndY
- dragStartY
);
954 if (regionWidth
< 2 && regionHeight
< 2 &&
955 self
.lastx_
!= undefined
&& self
.lastx_
!= -1) {
956 // TODO(danvk): pass along more info about the points, e.g. 'x'
957 if (self
.attr_('clickCallback') != null) {
958 self
.attr_('clickCallback')(event
, self
.lastx_
, self
.selPoints_
);
960 if (self
.attr_('pointClickCallback')) {
961 // check if the click was on a particular point.
963 var closestDistance
= 0;
964 for (var i
= 0; i
< self
.selPoints_
.length
; i
++) {
965 var p
= self
.selPoints_
[i
];
966 var distance
= Math
.pow(p
.canvasx
- dragEndX
, 2) +
967 Math
.pow(p
.canvasy
- dragEndY
, 2);
968 if (closestIdx
== -1 || distance
< closestDistance
) {
969 closestDistance
= distance
;
974 // Allow any click within two pixels of the dot.
975 var radius
= self
.attr_('highlightCircleSize') + 2;
976 if (closestDistance
<= 5 * 5) {
977 self
.attr_('pointClickCallback')(event
, self
.selPoints_
[closestIdx
]);
982 if (regionWidth
>= 10 && dragDirection
== Dygraph
.HORIZONTAL
) {
983 self
.doZoomX_(Math
.min(dragStartX
, dragEndX
),
984 Math
.max(dragStartX
, dragEndX
));
985 } else if (regionHeight
>= 10 && dragDirection
== Dygraph
.VERTICAL
){
986 self
.doZoomY_(Math
.min(dragStartY
, dragEndY
),
987 Math
.max(dragStartY
, dragEndY
));
989 self
.canvas_
.getContext("2d").clearRect(0, 0,
991 self
.canvas_
.height
);
1001 draggingDate
= null;
1007 // Double-clicking zooms back out
1008 Dygraph
.addEvent(this.mouseEventElement_
, 'dblclick', function(event
) {
1009 // Disable zooming out if panning.
1010 if (event
.altKey
|| event
.shiftKey
) return;
1017 * Draw a gray zoom rectangle over the desired area of the canvas. Also clears
1018 * up any previous zoom rectangles that were drawn. This could be optimized to
1019 * avoid extra redrawing, but it's tricky to avoid interactions with the status
1022 * @param {Number} direction the direction of the zoom rectangle. Acceptable
1023 * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL.
1024 * @param {Number} startX The X position where the drag started, in canvas
1026 * @param {Number} endX The current X position of the drag, in canvas coords.
1027 * @param {Number} startY The Y position where the drag started, in canvas
1029 * @param {Number} endY The current Y position of the drag, in canvas coords.
1030 * @param {Number} prevDirection the value of direction on the previous call to
1031 * this function. Used to avoid excess redrawing
1032 * @param {Number} prevEndX The value of endX on the previous call to this
1033 * function. Used to avoid excess redrawing
1034 * @param {Number} prevEndY The value of endY on the previous call to this
1035 * function. Used to avoid excess redrawing
1038 Dygraph
.prototype.drawZoomRect_
= function(direction
, startX
, endX
, startY
, endY
,
1039 prevDirection
, prevEndX
, prevEndY
) {
1040 var ctx
= this.canvas_
.getContext("2d");
1042 // Clean up from the previous rect if necessary
1043 if (prevDirection
== Dygraph
.HORIZONTAL
) {
1044 ctx
.clearRect(Math
.min(startX
, prevEndX
), 0,
1045 Math
.abs(startX
- prevEndX
), this.height_
);
1046 } else if (prevDirection
== Dygraph
.VERTICAL
){
1047 ctx
.clearRect(0, Math
.min(startY
, prevEndY
),
1048 this.width_
, Math
.abs(startY
- prevEndY
));
1051 // Draw a light-grey rectangle to show the new viewing area
1052 if (direction
== Dygraph
.HORIZONTAL
) {
1053 if (endX
&& startX
) {
1054 ctx
.fillStyle
= "rgba(128,128,128,0.33)";
1055 ctx
.fillRect(Math
.min(startX
, endX
), 0,
1056 Math
.abs(endX
- startX
), this.height_
);
1059 if (direction
== Dygraph
.VERTICAL
) {
1060 if (endY
&& startY
) {
1061 ctx
.fillStyle
= "rgba(128,128,128,0.33)";
1062 ctx
.fillRect(0, Math
.min(startY
, endY
),
1063 this.width_
, Math
.abs(endY
- startY
));
1069 * Zoom to something containing [lowX, highX]. These are pixel coordinates in
1070 * the canvas. The exact zoom window may be slightly larger if there are no data
1071 * points near lowX or highX. Don't confuse this function with doZoomXDates,
1072 * which accepts dates that match the raw data. This function redraws the graph.
1074 * @param {Number} lowX The leftmost pixel value that should be visible.
1075 * @param {Number} highX The rightmost pixel value that should be visible.
1078 Dygraph
.prototype.doZoomX_
= function(lowX
, highX
) {
1079 // Find the earliest and latest dates contained in this canvasx range.
1080 // Convert the call to date ranges of the raw data.
1081 var r
= this.toDataCoords(lowX
, null);
1083 r
= this.toDataCoords(highX
, null);
1085 this.doZoomXDates_(minDate
, maxDate
);
1089 * Zoom to something containing [minDate, maxDate] values. Don't confuse this
1090 * method with doZoomX which accepts pixel coordinates. This function redraws
1093 * @param {Number} minDate The minimum date that should be visible.
1094 * @param {Number} maxDate The maximum date that should be visible.
1097 Dygraph
.prototype.doZoomXDates_
= function(minDate
, maxDate
) {
1098 this.dateWindow_
= [minDate
, maxDate
];
1099 this.zoomed_x_
= true;
1101 if (this.attr_("zoomCallback")) {
1102 var yRange
= this.yAxisRange();
1103 this.attr_("zoomCallback")(minDate
, maxDate
, yRange
[0], yRange
[1]);
1108 * Zoom to something containing [lowY, highY]. These are pixel coordinates in
1109 * the canvas. This function redraws the graph.
1111 * @param {Number} lowY The topmost pixel value that should be visible.
1112 * @param {Number} highY The lowest pixel value that should be visible.
1115 Dygraph
.prototype.doZoomY_
= function(lowY
, highY
) {
1116 // Find the highest and lowest values in pixel range for each axis.
1117 // Note that lowY (in pixels) corresponds to the max Value (in data coords).
1118 // This is because pixels increase as you go down on the screen, whereas data
1119 // coordinates increase as you go up the screen.
1120 var valueRanges
= [];
1121 for (var i
= 0; i
< this.axes_
.length
; i
++) {
1122 var hi
= this.toDataCoords(null, lowY
, i
);
1123 var low
= this.toDataCoords(null, highY
, i
);
1124 this.axes_
[i
].valueWindow
= [low
[1], hi
[1]];
1125 valueRanges
.push([low
[1], hi
[1]]);
1128 this.zoomed_y_
= true;
1130 if (this.attr_("zoomCallback")) {
1131 var xRange
= this.xAxisRange();
1132 var yRange
= this.yAxisRange();
1133 this.attr_("zoomCallback")(xRange
[0], xRange
[1], yRange
[0], yRange
[1]);
1138 * Reset the zoom to the original view coordinates. This is the same as
1139 * double-clicking on the graph.
1143 Dygraph
.prototype.doUnzoom_
= function() {
1145 if (this.dateWindow_
!= null) {
1147 this.dateWindow_
= null;
1150 for (var i
= 0; i
< this.axes_
.length
; i
++) {
1151 if (this.axes_
[i
].valueWindow
!= null) {
1153 delete this.axes_
[i
].valueWindow
;
1158 // Putting the drawing operation before the callback because it resets
1160 this.zoomed_x_
= false;
1161 this.zoomed_y_
= false;
1163 if (this.attr_("zoomCallback")) {
1164 var minDate
= this.rawData_
[0][0];
1165 var maxDate
= this.rawData_
[this.rawData_
.length
- 1][0];
1166 this.attr_("zoomCallback")(minDate
, maxDate
, this.yAxisRanges());
1172 * When the mouse moves in the canvas, display information about a nearby data
1173 * point and draw dots over those points in the data series. This function
1174 * takes care of cleanup of previously-drawn dots.
1175 * @param {Object} event The mousemove event from the browser.
1178 Dygraph
.prototype.mouseMove_
= function(event
) {
1179 var canvasx
= Dygraph
.pageX(event
) - Dygraph
.findPosX(this.mouseEventElement_
);
1180 var points
= this.layout_
.points
;
1185 // Loop through all the points and find the date nearest to our current
1187 var minDist
= 1e+100;
1189 for (var i
= 0; i
< points
.length
; i
++) {
1190 var point
= points
[i
];
1191 if (point
== null) continue;
1192 var dist
= Math
.abs(points
[i
].canvasx
- canvasx
);
1193 if (dist
> minDist
) continue;
1197 if (idx
>= 0) lastx
= points
[idx
].xval
;
1198 // Check that you can really highlight the last day's data
1199 var last
= points
[points
.length
-1];
1200 if (last
!= null && canvasx
> last
.canvasx
)
1201 lastx
= points
[points
.length
-1].xval
;
1203 // Extract the points we've selected
1204 this.selPoints_
= [];
1205 var l
= points
.length
;
1206 if (!this.attr_("stackedGraph")) {
1207 for (var i
= 0; i
< l
; i
++) {
1208 if (points
[i
].xval
== lastx
) {
1209 this.selPoints_
.push(points
[i
]);
1213 // Need to 'unstack' points starting from the bottom
1214 var cumulative_sum
= 0;
1215 for (var i
= l
- 1; i
>= 0; i
--) {
1216 if (points
[i
].xval
== lastx
) {
1217 var p
= {}; // Clone the point since we modify it
1218 for (var k
in points
[i
]) {
1219 p
[k
] = points
[i
][k
];
1221 p
.yval
-= cumulative_sum
;
1222 cumulative_sum
+= p
.yval
;
1223 this.selPoints_
.push(p
);
1226 this.selPoints_
.reverse();
1229 if (this.attr_("highlightCallback")) {
1230 var px
= this.lastx_
;
1231 if (px
!== null && lastx
!= px
) {
1232 // only fire if the selected point has changed.
1233 this.attr_("highlightCallback")(event
, lastx
, this.selPoints_
, this.idxToRow_(idx
));
1237 // Save last x position for callbacks.
1238 this.lastx_
= lastx
;
1240 this.updateSelection_();
1244 * Transforms layout_.points index into data row number.
1245 * @param int layout_.points index
1246 * @return int row number, or -1 if none could be found.
1249 Dygraph
.prototype.idxToRow_
= function(idx
) {
1250 if (idx
< 0) return -1;
1252 for (var i
in this.layout_
.datasets
) {
1253 if (idx
< this.layout_
.datasets
[i
].length
) {
1254 return this.boundaryIds_
[0][0]+idx
;
1256 idx
-= this.layout_
.datasets
[i
].length
;
1262 * Draw dots over the selectied points in the data series. This function
1263 * takes care of cleanup of previously-drawn dots.
1266 Dygraph
.prototype.updateSelection_
= function() {
1267 // Clear the previously drawn vertical, if there is one
1268 var ctx
= this.canvas_
.getContext("2d");
1269 if (this.previousVerticalX_
>= 0) {
1270 // Determine the maximum highlight circle size.
1271 var maxCircleSize
= 0;
1272 var labels
= this.attr_('labels');
1273 for (var i
= 1; i
< labels
.length
; i
++) {
1274 var r
= this.attr_('highlightCircleSize', labels
[i
]);
1275 if (r
> maxCircleSize
) maxCircleSize
= r
;
1277 var px
= this.previousVerticalX_
;
1278 ctx
.clearRect(px
- maxCircleSize
- 1, 0,
1279 2 * maxCircleSize
+ 2, this.height_
);
1282 var isOK
= function(x
) { return x
&& !isNaN(x
); };
1284 if (this.selPoints_
.length
> 0) {
1285 var canvasx
= this.selPoints_
[0].canvasx
;
1287 // Set the status message to indicate the selected point(s)
1288 var replace
= this.attr_('xValueFormatter')(this.lastx_
, this) + ":";
1289 var fmtFunc
= this.attr_('yValueFormatter');
1290 var clen
= this.colors_
.length
;
1292 if (this.attr_('showLabelsOnHighlight')) {
1293 // Set the status message to indicate the selected point(s)
1294 for (var i
= 0; i
< this.selPoints_
.length
; i
++) {
1295 if (!this.attr_("labelsShowZeroValues") && this.selPoints_
[i
].yval
== 0) continue;
1296 if (!isOK(this.selPoints_
[i
].canvasy
)) continue;
1297 if (this.attr_("labelsSeparateLines")) {
1300 var point
= this.selPoints_
[i
];
1301 var c
= new RGBColor(this.plotter_
.colors
[point
.name
]);
1302 var yval
= fmtFunc(point
.yval
);
1303 replace
+= " <b><font color='" + c
.toHex() + "'>"
1304 + point
.name
+ "</font></b>:"
1308 this.attr_("labelsDiv").innerHTML
= replace
;
1311 // Draw colored circles over the center of each selected point
1313 for (var i
= 0; i
< this.selPoints_
.length
; i
++) {
1314 if (!isOK(this.selPoints_
[i
].canvasy
)) continue;
1316 this.attr_('highlightCircleSize', this.selPoints_
[i
].name
);
1318 ctx
.fillStyle
= this.plotter_
.colors
[this.selPoints_
[i
].name
];
1319 ctx
.arc(canvasx
, this.selPoints_
[i
].canvasy
, circleSize
,
1320 0, 2 * Math
.PI
, false);
1325 this.previousVerticalX_
= canvasx
;
1330 * Set manually set selected dots, and display information about them
1331 * @param int row number that should by highlighted
1332 * false value clears the selection
1335 Dygraph
.prototype.setSelection
= function(row
) {
1336 // Extract the points we've selected
1337 this.selPoints_
= [];
1340 if (row
!== false) {
1341 row
= row
-this.boundaryIds_
[0][0];
1344 if (row
!== false && row
>= 0) {
1345 for (var i
in this.layout_
.datasets
) {
1346 if (row
< this.layout_
.datasets
[i
].length
) {
1347 var point
= this.layout_
.points
[pos
+row
];
1349 if (this.attr_("stackedGraph")) {
1350 point
= this.layout_
.unstackPointAtIndex(pos
+row
);
1353 this.selPoints_
.push(point
);
1355 pos
+= this.layout_
.datasets
[i
].length
;
1359 if (this.selPoints_
.length
) {
1360 this.lastx_
= this.selPoints_
[0].xval
;
1361 this.updateSelection_();
1364 this.clearSelection();
1370 * The mouse has left the canvas. Clear out whatever artifacts remain
1371 * @param {Object} event the mouseout event from the browser.
1374 Dygraph
.prototype.mouseOut_
= function(event
) {
1375 if (this.attr_("unhighlightCallback")) {
1376 this.attr_("unhighlightCallback")(event
);
1379 if (this.attr_("hideOverlayOnMouseOut")) {
1380 this.clearSelection();
1385 * Remove all selection from the canvas
1388 Dygraph
.prototype.clearSelection
= function() {
1389 // Get rid of the overlay data
1390 var ctx
= this.canvas_
.getContext("2d");
1391 ctx
.clearRect(0, 0, this.width_
, this.height_
);
1392 this.attr_("labelsDiv").innerHTML
= "";
1393 this.selPoints_
= [];
1398 * Returns the number of the currently selected row
1399 * @return int row number, of -1 if nothing is selected
1402 Dygraph
.prototype.getSelection
= function() {
1403 if (!this.selPoints_
|| this.selPoints_
.length
< 1) {
1407 for (var row
=0; row
<this.layout_
.points
.length
; row
++ ) {
1408 if (this.layout_
.points
[row
].x
== this.selPoints_
[0].x
) {
1409 return row
+ this.boundaryIds_
[0][0];
1415 Dygraph
.zeropad
= function(x
) {
1416 if (x
< 10) return "0" + x
; else return "" + x
;
1420 * Return a string version of the hours, minutes and seconds portion of a date.
1421 * @param {Number} date The JavaScript date (ms since epoch)
1422 * @return {String} A time of the form "HH:MM:SS"
1425 Dygraph
.hmsString_
= function(date
) {
1426 var zeropad
= Dygraph
.zeropad
;
1427 var d
= new Date(date
);
1428 if (d
.getSeconds()) {
1429 return zeropad(d
.getHours()) + ":" +
1430 zeropad(d
.getMinutes()) + ":" +
1431 zeropad(d
.getSeconds());
1433 return zeropad(d
.getHours()) + ":" + zeropad(d
.getMinutes());
1438 * Convert a JS date to a string appropriate to display on an axis that
1439 * is displaying values at the stated granularity.
1440 * @param {Date} date The date to format
1441 * @param {Number} granularity One of the Dygraph granularity constants
1442 * @return {String} The formatted date
1445 Dygraph
.dateAxisFormatter
= function(date
, granularity
) {
1446 if (granularity
>= Dygraph
.MONTHLY
) {
1447 return date
.strftime('%b %y');
1449 var frac
= date
.getHours() * 3600 + date
.getMinutes() * 60 + date
.getSeconds() + date
.getMilliseconds();
1450 if (frac
== 0 || granularity
>= Dygraph
.DAILY
) {
1451 return new Date(date
.getTime() + 3600*1000).strftime('%d%b');
1453 return Dygraph
.hmsString_(date
.getTime());
1459 * Convert a JS date (millis since epoch) to YYYY/MM/DD
1460 * @param {Number} date The JavaScript date (ms since epoch)
1461 * @return {String} A date of the form "YYYY/MM/DD"
1464 Dygraph
.dateString_
= function(date
, self
) {
1465 var zeropad
= Dygraph
.zeropad
;
1466 var d
= new Date(date
);
1469 var year
= "" + d
.getFullYear();
1470 // Get a 0 padded month string
1471 var month
= zeropad(d
.getMonth() + 1); //months are 0-offset, sigh
1472 // Get a 0 padded day string
1473 var day
= zeropad(d
.getDate());
1476 var frac
= d
.getHours() * 3600 + d
.getMinutes() * 60 + d
.getSeconds();
1477 if (frac
) ret
= " " + Dygraph
.hmsString_(date
);
1479 return year
+ "/" + month + "/" + day
+ ret
;
1483 * Round a number to the specified number of digits past the decimal point.
1484 * @param {Number} num The number to round
1485 * @param {Number} places The number of decimals to which to round
1486 * @return {Number} The rounded number
1489 Dygraph
.round_
= function(num
, places
) {
1490 var shift
= Math
.pow(10, places
);
1491 return Math
.round(num
* shift
)/shift
;
1495 * Fires when there's data available to be graphed.
1496 * @param {String} data Raw CSV data to be plotted
1499 Dygraph
.prototype.loadedEvent_
= function(data
) {
1500 this.rawData_
= this.parseCSV_(data
);
1504 Dygraph
.prototype.months
= ["Jan", "Feb", "Mar", "Apr", "May", "Jun",
1505 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
1506 Dygraph
.prototype.quarters
= ["Jan", "Apr", "Jul", "Oct"];
1509 * Add ticks on the x-axis representing years, months, quarters, weeks, or days
1512 Dygraph
.prototype.addXTicks_
= function() {
1513 // Determine the correct ticks scale on the x-axis: quarterly, monthly, ...
1514 var startDate
, endDate
;
1515 if (this.dateWindow_
) {
1516 startDate
= this.dateWindow_
[0];
1517 endDate
= this.dateWindow_
[1];
1519 startDate
= this.rawData_
[0][0];
1520 endDate
= this.rawData_
[this.rawData_
.length
- 1][0];
1523 var xTicks
= this.attr_('xTicker')(startDate
, endDate
, this);
1524 this.layout_
.updateOptions({xTicks
: xTicks
});
1527 // Time granularity enumeration
1528 Dygraph
.SECONDLY
= 0;
1529 Dygraph
.TWO_SECONDLY
= 1;
1530 Dygraph
.FIVE_SECONDLY
= 2;
1531 Dygraph
.TEN_SECONDLY
= 3;
1532 Dygraph
.THIRTY_SECONDLY
= 4;
1533 Dygraph
.MINUTELY
= 5;
1534 Dygraph
.TWO_MINUTELY
= 6;
1535 Dygraph
.FIVE_MINUTELY
= 7;
1536 Dygraph
.TEN_MINUTELY
= 8;
1537 Dygraph
.THIRTY_MINUTELY
= 9;
1538 Dygraph
.HOURLY
= 10;
1539 Dygraph
.TWO_HOURLY
= 11;
1540 Dygraph
.SIX_HOURLY
= 12;
1542 Dygraph
.WEEKLY
= 14;
1543 Dygraph
.MONTHLY
= 15;
1544 Dygraph
.QUARTERLY
= 16;
1545 Dygraph
.BIANNUAL
= 17;
1546 Dygraph
.ANNUAL
= 18;
1547 Dygraph
.DECADAL
= 19;
1548 Dygraph
.NUM_GRANULARITIES
= 20;
1550 Dygraph
.SHORT_SPACINGS
= [];
1551 Dygraph
.SHORT_SPACINGS
[Dygraph
.SECONDLY
] = 1000 * 1;
1552 Dygraph
.SHORT_SPACINGS
[Dygraph
.TWO_SECONDLY
] = 1000 * 2;
1553 Dygraph
.SHORT_SPACINGS
[Dygraph
.FIVE_SECONDLY
] = 1000 * 5;
1554 Dygraph
.SHORT_SPACINGS
[Dygraph
.TEN_SECONDLY
] = 1000 * 10;
1555 Dygraph
.SHORT_SPACINGS
[Dygraph
.THIRTY_SECONDLY
] = 1000 * 30;
1556 Dygraph
.SHORT_SPACINGS
[Dygraph
.MINUTELY
] = 1000 * 60;
1557 Dygraph
.SHORT_SPACINGS
[Dygraph
.TWO_MINUTELY
] = 1000 * 60 * 2;
1558 Dygraph
.SHORT_SPACINGS
[Dygraph
.FIVE_MINUTELY
] = 1000 * 60 * 5;
1559 Dygraph
.SHORT_SPACINGS
[Dygraph
.TEN_MINUTELY
] = 1000 * 60 * 10;
1560 Dygraph
.SHORT_SPACINGS
[Dygraph
.THIRTY_MINUTELY
] = 1000 * 60 * 30;
1561 Dygraph
.SHORT_SPACINGS
[Dygraph
.HOURLY
] = 1000 * 3600;
1562 Dygraph
.SHORT_SPACINGS
[Dygraph
.TWO_HOURLY
] = 1000 * 3600 * 2;
1563 Dygraph
.SHORT_SPACINGS
[Dygraph
.SIX_HOURLY
] = 1000 * 3600 * 6;
1564 Dygraph
.SHORT_SPACINGS
[Dygraph
.DAILY
] = 1000 * 86400;
1565 Dygraph
.SHORT_SPACINGS
[Dygraph
.WEEKLY
] = 1000 * 604800;
1569 // If we used this time granularity, how many ticks would there be?
1570 // This is only an approximation, but it's generally good enough.
1572 Dygraph
.prototype.NumXTicks
= function(start_time
, end_time
, granularity
) {
1573 if (granularity
< Dygraph
.MONTHLY
) {
1574 // Generate one tick mark for every fixed interval of time.
1575 var spacing
= Dygraph
.SHORT_SPACINGS
[granularity
];
1576 return Math
.floor(0.5 + 1.0 * (end_time
- start_time
) / spacing
);
1578 var year_mod
= 1; // e.g. to only print one point every 10 years.
1579 var num_months
= 12;
1580 if (granularity
== Dygraph
.QUARTERLY
) num_months
= 3;
1581 if (granularity
== Dygraph
.BIANNUAL
) num_months
= 2;
1582 if (granularity
== Dygraph
.ANNUAL
) num_months
= 1;
1583 if (granularity
== Dygraph
.DECADAL
) { num_months
= 1; year_mod
= 10; }
1585 var msInYear
= 365.2524 * 24 * 3600 * 1000;
1586 var num_years
= 1.0 * (end_time
- start_time
) / msInYear
;
1587 return Math
.floor(0.5 + 1.0 * num_years
* num_months
/ year_mod
);
1593 // Construct an x-axis of nicely-formatted times on meaningful boundaries
1594 // (e.g. 'Jan 09' rather than 'Jan 22, 2009').
1596 // Returns an array containing {v: millis, label: label} dictionaries.
1598 Dygraph
.prototype.GetXAxis
= function(start_time
, end_time
, granularity
) {
1599 var formatter
= this.attr_("xAxisLabelFormatter");
1601 if (granularity
< Dygraph
.MONTHLY
) {
1602 // Generate one tick mark for every fixed interval of time.
1603 var spacing
= Dygraph
.SHORT_SPACINGS
[granularity
];
1604 var format
= '%d%b'; // e.g. "1Jan"
1606 // Find a time less than start_time which occurs on a "nice" time boundary
1607 // for this granularity.
1608 var g
= spacing
/ 1000;
1609 var d
= new Date(start_time
);
1610 if (g
<= 60) { // seconds
1611 var x
= d
.getSeconds(); d
.setSeconds(x
- x
% g
);
1615 if (g
<= 60) { // minutes
1616 var x
= d
.getMinutes(); d
.setMinutes(x
- x
% g
);
1621 if (g
<= 24) { // days
1622 var x
= d
.getHours(); d
.setHours(x
- x
% g
);
1627 if (g
== 7) { // one week
1628 d
.setDate(d
.getDate() - d
.getDay());
1633 start_time
= d
.getTime();
1635 for (var t
= start_time
; t
<= end_time
; t
+= spacing
) {
1636 ticks
.push({ v
:t
, label
: formatter(new Date(t
), granularity
) });
1639 // Display a tick mark on the first of a set of months of each year.
1640 // Years get a tick mark iff y % year_mod == 0. This is useful for
1641 // displaying a tick mark once every 10 years, say, on long time scales.
1643 var year_mod
= 1; // e.g. to only print one point every 10 years.
1645 if (granularity
== Dygraph
.MONTHLY
) {
1646 months
= [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ];
1647 } else if (granularity
== Dygraph
.QUARTERLY
) {
1648 months
= [ 0, 3, 6, 9 ];
1649 } else if (granularity
== Dygraph
.BIANNUAL
) {
1651 } else if (granularity
== Dygraph
.ANNUAL
) {
1653 } else if (granularity
== Dygraph
.DECADAL
) {
1658 var start_year
= new Date(start_time
).getFullYear();
1659 var end_year
= new Date(end_time
).getFullYear();
1660 var zeropad
= Dygraph
.zeropad
;
1661 for (var i
= start_year
; i
<= end_year
; i
++) {
1662 if (i
% year_mod
!= 0) continue;
1663 for (var j
= 0; j
< months
.length
; j
++) {
1664 var date_str
= i
+ "/" + zeropad(1 + months[j]) + "/01";
1665 var t
= Date
.parse(date_str
);
1666 if (t
< start_time
|| t
> end_time
) continue;
1667 ticks
.push({ v
:t
, label
: formatter(new Date(t
), granularity
) });
1677 * Add ticks to the x-axis based on a date range.
1678 * @param {Number} startDate Start of the date window (millis since epoch)
1679 * @param {Number} endDate End of the date window (millis since epoch)
1680 * @return {Array.<Object>} Array of {label, value} tuples.
1683 Dygraph
.dateTicker
= function(startDate
, endDate
, self
) {
1685 for (var i
= 0; i
< Dygraph
.NUM_GRANULARITIES
; i
++) {
1686 var num_ticks
= self
.NumXTicks(startDate
, endDate
, i
);
1687 if (self
.width_
/ num_ticks
>= self
.attr_('pixelsPerXLabel')) {
1694 return self
.GetXAxis(startDate
, endDate
, chosen
);
1696 // TODO(danvk): signal error.
1701 * Add ticks when the x axis has numbers on it (instead of dates)
1702 * @param {Number} startDate Start of the date window (millis since epoch)
1703 * @param {Number} endDate End of the date window (millis since epoch)
1705 * @param {function} attribute accessor function.
1706 * @return {Array.<Object>} Array of {label, value} tuples.
1709 Dygraph
.numericTicks
= function(minV
, maxV
, self
, axis_props
, vals
) {
1710 var attr
= function(k
) {
1711 if (axis_props
&& axis_props
.hasOwnProperty(k
)) return axis_props
[k
];
1712 return self
.attr_(k
);
1717 for (var i
= 0; i
< vals
.length
; i
++) {
1718 ticks
.push({v
: vals
[i
]});
1722 // Try labels every 1, 2, 5, 10, 20, 50, 100, etc.
1723 // Calculate the resulting tick spacing (i.e. this.height_ / nTicks
).
1724 // The first spacing greater than pixelsPerYLabel is what we use.
1725 // TODO(danvk): version that works on a log scale.
1726 if (attr("labelsKMG2")) {
1727 var mults
= [1, 2, 4, 8];
1729 var mults
= [1, 2, 5];
1731 var scale
, low_val
, high_val
, nTicks
;
1732 // TODO(danvk): make it possible to set this for x- and y-axes independently.
1733 var pixelsPerTick
= attr('pixelsPerYLabel');
1734 for (var i
= -10; i
< 50; i
++) {
1735 if (attr("labelsKMG2")) {
1736 var base_scale
= Math
.pow(16, i
);
1738 var base_scale
= Math
.pow(10, i
);
1740 for (var j
= 0; j
< mults
.length
; j
++) {
1741 scale
= base_scale
* mults
[j
];
1742 low_val
= Math
.floor(minV
/ scale
) * scale
;
1743 high_val
= Math
.ceil(maxV
/ scale
) * scale
;
1744 nTicks
= Math
.abs(high_val
- low_val
) / scale
;
1745 var spacing
= self
.height_
/ nTicks
;
1746 // wish I could break out of both loops at once...
1747 if (spacing
> pixelsPerTick
) break;
1749 if (spacing
> pixelsPerTick
) break;
1752 // Construct the set of ticks.
1753 // Allow reverse y-axis if it's explicitly requested.
1754 if (low_val
> high_val
) scale
*= -1;
1755 for (var i
= 0; i
< nTicks
; i
++) {
1756 var tickV
= low_val
+ i
* scale
;
1757 ticks
.push( {v
: tickV
} );
1761 // Add formatted labels to the ticks.
1764 if (attr("labelsKMB")) {
1766 k_labels
= [ "K", "M", "B", "T" ];
1768 if (attr("labelsKMG2")) {
1769 if (k
) self
.warn("Setting both labelsKMB and labelsKMG2. Pick one!");
1771 k_labels
= [ "k", "M", "G", "T" ];
1773 var formatter
= attr('yAxisLabelFormatter') ? attr('yAxisLabelFormatter') : attr('yValueFormatter');
1775 for (var i
= 0; i
< ticks
.length
; i
++) {
1776 var tickV
= ticks
[i
].v
;
1777 var absTickV
= Math
.abs(tickV
);
1779 if (formatter
!= undefined
) {
1780 label
= formatter(tickV
);
1782 label
= Dygraph
.round_(tickV
, 2);
1784 if (k_labels
.length
) {
1785 // Round up to an appropriate unit.
1787 for (var j
= 3; j
>= 0; j
--, n
/= k
) {
1788 if (absTickV
>= n
) {
1789 label
= Dygraph
.round_(tickV
/ n
, 1) + k_labels
[j
];
1794 ticks
[i
].label
= label
;
1799 // Computes the range of the data series (including confidence intervals).
1800 // series is either [ [x1, y1], [x2, y2], ... ] or
1801 // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ...
1802 // Returns [low, high]
1803 Dygraph
.prototype.extremeValues_
= function(series
) {
1804 var minY
= null, maxY
= null;
1806 var bars
= this.attr_("errorBars") || this.attr_("customBars");
1808 // With custom bars, maxY is the max of the high values.
1809 for (var j
= 0; j
< series
.length
; j
++) {
1810 var y
= series
[j
][1][0];
1812 var low
= y
- series
[j
][1][1];
1813 var high
= y
+ series
[j
][1][2];
1814 if (low
> y
) low
= y
; // this can happen with custom bars,
1815 if (high
< y
) high
= y
; // e.g. in tests/custom-bars
.html
1816 if (maxY
== null || high
> maxY
) {
1819 if (minY
== null || low
< minY
) {
1824 for (var j
= 0; j
< series
.length
; j
++) {
1825 var y
= series
[j
][1];
1826 if (y
=== null || isNaN(y
)) continue;
1827 if (maxY
== null || y
> maxY
) {
1830 if (minY
== null || y
< minY
) {
1836 return [minY
, maxY
];
1840 * This function is called once when the chart's data is changed or the options
1841 * dictionary is updated. It is _not_ called when the user pans or zooms. The
1842 * idea is that values derived from the chart's data can be computed here,
1843 * rather than every time the chart is drawn. This includes things like the
1844 * number of axes, rolling averages, etc.
1846 Dygraph
.prototype.predraw_
= function() {
1847 // TODO(danvk): move more computations out of drawGraph_ and into here.
1848 this.computeYAxes_();
1850 // Create a new plotter.
1851 if (this.plotter_
) this.plotter_
.clear();
1852 this.plotter_
= new DygraphCanvasRenderer(this,
1853 this.hidden_
, this.layout_
,
1854 this.renderOptions_
);
1856 // The roller sits in the bottom left corner of the chart. We don't know where
1857 // this will be until the options are available, so it's positioned here.
1858 this.createRollInterface_();
1860 // Same thing applies for the labelsDiv. It's right edge should be flush with
1861 // the right edge of the charting area (which may not be the same as the right
1862 // edge of the div, if we have two y-axes.
1863 this.positionLabelsDiv_();
1865 // If the data or options have changed, then we'd better redraw.
1871 * Update the graph with new data. This method is called when the viewing area
1872 * has changed. If the underlying data or options have changed, predraw_ will
1873 * be called before drawGraph_ is called.
1876 Dygraph
.prototype.drawGraph_
= function() {
1877 var data
= this.rawData_
;
1879 // This is used to set the second parameter to drawCallback, below.
1880 var is_initial_draw
= this.is_initial_draw_
;
1881 this.is_initial_draw_
= false;
1883 var minY
= null, maxY
= null;
1884 this.layout_
.removeAllDatasets();
1886 this.attrs_
['pointSize'] = 0.5 * this.attr_('highlightCircleSize');
1888 // Loop over the fields (series). Go from the last to the first,
1889 // because if they're stacked that's how we accumulate the values.
1891 var cumulative_y
= []; // For stacked series.
1894 var extremes
= {}; // series name -> [low, high]
1896 // Loop over all fields and create datasets
1897 for (var i
= data
[0].length
- 1; i
>= 1; i
--) {
1898 if (!this.visibility()[i
- 1]) continue;
1900 var seriesName
= this.attr_("labels")[i
];
1901 var connectSeparatedPoints
= this.attr_('connectSeparatedPoints', i
);
1904 for (var j
= 0; j
< data
.length
; j
++) {
1905 if (data
[j
][i
] != null || !connectSeparatedPoints
) {
1906 var date
= data
[j
][0];
1907 series
.push([date
, data
[j
][i
]]);
1911 // TODO(danvk): move this into predraw_. It's insane to do it here.
1912 series
= this.rollingAverage(series
, this.rollPeriod_
);
1914 // Prune down to the desired range, if necessary (for zooming)
1915 // Because there can be lines going to points outside of the visible area,
1916 // we actually prune to visible points, plus one on either side.
1917 var bars
= this.attr_("errorBars") || this.attr_("customBars");
1918 if (this.dateWindow_
) {
1919 var low
= this.dateWindow_
[0];
1920 var high
= this.dateWindow_
[1];
1922 // TODO(danvk): do binary search instead of linear search.
1923 // TODO(danvk): pass firstIdx and lastIdx directly to the renderer.
1924 var firstIdx
= null, lastIdx
= null;
1925 for (var k
= 0; k
< series
.length
; k
++) {
1926 if (series
[k
][0] >= low
&& firstIdx
=== null) {
1929 if (series
[k
][0] <= high
) {
1933 if (firstIdx
=== null) firstIdx
= 0;
1934 if (firstIdx
> 0) firstIdx
--;
1935 if (lastIdx
=== null) lastIdx
= series
.length
- 1;
1936 if (lastIdx
< series
.length
- 1) lastIdx
++;
1937 this.boundaryIds_
[i
-1] = [firstIdx
, lastIdx
];
1938 for (var k
= firstIdx
; k
<= lastIdx
; k
++) {
1939 pruned
.push(series
[k
]);
1943 this.boundaryIds_
[i
-1] = [0, series
.length
-1];
1946 var seriesExtremes
= this.extremeValues_(series
);
1949 for (var j
=0; j
<series
.length
; j
++) {
1950 val
= [series
[j
][0], series
[j
][1][0], series
[j
][1][1], series
[j
][1][2]];
1953 } else if (this.attr_("stackedGraph")) {
1954 var l
= series
.length
;
1956 for (var j
= 0; j
< l
; j
++) {
1957 // If one data set has a NaN, let all subsequent stacked
1958 // sets inherit the NaN -- only start at 0 for the first set.
1959 var x
= series
[j
][0];
1960 if (cumulative_y
[x
] === undefined
) {
1961 cumulative_y
[x
] = 0;
1964 actual_y
= series
[j
][1];
1965 cumulative_y
[x
] += actual_y
;
1967 series
[j
] = [x
, cumulative_y
[x
]]
1969 if (cumulative_y
[x
] > seriesExtremes
[1]) {
1970 seriesExtremes
[1] = cumulative_y
[x
];
1972 if (cumulative_y
[x
] < seriesExtremes
[0]) {
1973 seriesExtremes
[0] = cumulative_y
[x
];
1977 extremes
[seriesName
] = seriesExtremes
;
1979 datasets
[i
] = series
;
1982 for (var i
= 1; i
< datasets
.length
; i
++) {
1983 if (!this.visibility()[i
- 1]) continue;
1984 this.layout_
.addDataset(this.attr_("labels")[i
], datasets
[i
]);
1987 // TODO(danvk): this method doesn't need to return anything.
1988 var out
= this.computeYAxisRanges_(extremes
);
1990 var seriesToAxisMap
= out
[1];
1991 this.layout_
.updateOptions( { yAxes
: axes
,
1992 seriesToAxisMap
: seriesToAxisMap
1997 // Tell PlotKit to use this new data and render itself
1998 this.layout_
.updateOptions({dateWindow
: this.dateWindow_
});
1999 this.layout_
.evaluateWithError();
2000 this.plotter_
.clear();
2001 this.plotter_
.render();
2002 this.canvas_
.getContext('2d').clearRect(0, 0, this.canvas_
.width
,
2003 this.canvas_
.height
);
2005 if (this.attr_("drawCallback") !== null) {
2006 this.attr_("drawCallback")(this, is_initial_draw
);
2011 * Determine properties of the y-axes which are independent of the data
2012 * currently being displayed. This includes things like the number of axes and
2013 * the style of the axes. It does not include the range of each axis and its
2015 * This fills in this.axes_ and this.seriesToAxisMap_.
2016 * axes_ = [ { options } ]
2017 * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... }
2018 * indices are into the axes_ array.
2020 Dygraph
.prototype.computeYAxes_
= function() {
2022 if (this.axes_
!= undefined
) {
2023 // Preserve valueWindow settings.
2025 for (var index
= 0; index
< this.axes_
.length
; index
++) {
2026 valueWindow
.push(this.axes_
[index
].valueWindow
);
2030 this.axes_
= [{}]; // always have at least one y-axis.
2031 this.seriesToAxisMap_
= {};
2033 // Get a list of series names.
2034 var labels
= this.attr_("labels");
2036 for (var i
= 1; i
< labels
.length
; i
++) series
[labels
[i
]] = (i
- 1);
2038 // all options which could be applied per-axis:
2046 'axisLabelFontSize',
2050 // Copy global axis options over to the first axis.
2051 for (var i
= 0; i
< axisOptions
.length
; i
++) {
2052 var k
= axisOptions
[i
];
2053 var v
= this.attr_(k
);
2054 if (v
) this.axes_
[0][k
] = v
;
2057 // Go through once and add all the axes.
2058 for (var seriesName
in series
) {
2059 if (!series
.hasOwnProperty(seriesName
)) continue;
2060 var axis
= this.attr_("axis", seriesName
);
2062 this.seriesToAxisMap_
[seriesName
] = 0;
2065 if (typeof(axis
) == 'object') {
2066 // Add a new axis, making a copy of its per-axis options.
2068 Dygraph
.update(opts
, this.axes_
[0]);
2069 Dygraph
.update(opts
, { valueRange
: null }); // shouldn't inherit this.
2070 Dygraph
.update(opts
, axis
);
2071 this.axes_
.push(opts
);
2072 this.seriesToAxisMap_
[seriesName
] = this.axes_
.length
- 1;
2076 // Go through one more time and assign series to an axis defined by another
2077 // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } }
2078 for (var seriesName
in series
) {
2079 if (!series
.hasOwnProperty(seriesName
)) continue;
2080 var axis
= this.attr_("axis", seriesName
);
2081 if (typeof(axis
) == 'string') {
2082 if (!this.seriesToAxisMap_
.hasOwnProperty(axis
)) {
2083 this.error("Series " + seriesName
+ " wants to share a y-axis with " +
2084 "series " + axis
+ ", which does not define its own axis.");
2087 var idx
= this.seriesToAxisMap_
[axis
];
2088 this.seriesToAxisMap_
[seriesName
] = idx
;
2092 // Now we remove series from seriesToAxisMap_ which are not visible. We do
2093 // this last so that hiding the first series doesn't destroy the axis
2094 // properties of the primary axis.
2095 var seriesToAxisFiltered
= {};
2096 var vis
= this.visibility();
2097 for (var i
= 1; i
< labels
.length
; i
++) {
2099 if (vis
[i
- 1]) seriesToAxisFiltered
[s
] = this.seriesToAxisMap_
[s
];
2101 this.seriesToAxisMap_
= seriesToAxisFiltered
;
2103 if (valueWindow
!= undefined
) {
2104 // Restore valueWindow settings.
2105 for (var index
= 0; index
< valueWindow
.length
; index
++) {
2106 this.axes_
[index
].valueWindow
= valueWindow
[index
];
2112 * Returns the number of y-axes on the chart.
2113 * @return {Number} the number of axes.
2115 Dygraph
.prototype.numAxes
= function() {
2117 for (var series
in this.seriesToAxisMap_
) {
2118 if (!this.seriesToAxisMap_
.hasOwnProperty(series
)) continue;
2119 var idx
= this.seriesToAxisMap_
[series
];
2120 if (idx
> last_axis
) last_axis
= idx
;
2122 return 1 + last_axis
;
2126 * Determine the value range and tick marks for each axis.
2127 * @param {Object} extremes A mapping from seriesName -> [low, high]
2128 * This fills in the valueRange and ticks fields in each entry of this.axes_.
2130 Dygraph
.prototype.computeYAxisRanges_
= function(extremes
) {
2131 // Build a map from axis number -> [list of series names]
2132 var seriesForAxis
= [];
2133 for (var series
in this.seriesToAxisMap_
) {
2134 if (!this.seriesToAxisMap_
.hasOwnProperty(series
)) continue;
2135 var idx
= this.seriesToAxisMap_
[series
];
2136 while (seriesForAxis
.length
<= idx
) seriesForAxis
.push([]);
2137 seriesForAxis
[idx
].push(series
);
2140 // Compute extreme values, a span and tick marks for each axis.
2141 for (var i
= 0; i
< this.axes_
.length
; i
++) {
2142 var axis
= this.axes_
[i
];
2143 if (axis
.valueWindow
) {
2144 // This is only set if the user has zoomed on the y-axis. It is never set
2145 // by a user. It takes precedence over axis.valueRange because, if you set
2146 // valueRange, you'd still expect to be able to pan.
2147 axis
.computedValueRange
= [axis
.valueWindow
[0], axis
.valueWindow
[1]];
2148 } else if (axis
.valueRange
) {
2149 // This is a user-set value range for this axis.
2150 axis
.computedValueRange
= [axis
.valueRange
[0], axis
.valueRange
[1]];
2152 // Calculate the extremes of extremes.
2153 var series
= seriesForAxis
[i
];
2154 var minY
= Infinity
; // extremes[series[0]][0];
2155 var maxY
= -Infinity
; // extremes[series[0]][1];
2156 for (var j
= 0; j
< series
.length
; j
++) {
2157 minY
= Math
.min(extremes
[series
[j
]][0], minY
);
2158 maxY
= Math
.max(extremes
[series
[j
]][1], maxY
);
2160 if (axis
.includeZero
&& minY
> 0) minY
= 0;
2162 // Add some padding and round up to an integer to be human-friendly.
2163 var span
= maxY
- minY
;
2164 // special case: if we have no sense of scale, use +/-10% of the sole value
.
2165 if (span
== 0) { span
= maxY
; }
2166 var maxAxisY
= maxY
+ 0.1 * span
;
2167 var minAxisY
= minY
- 0.1 * span
;
2169 // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense.
2170 if (!this.attr_("avoidMinZero")) {
2171 if (minAxisY
< 0 && minY
>= 0) minAxisY
= 0;
2172 if (maxAxisY
> 0 && maxY
<= 0) maxAxisY
= 0;
2175 if (this.attr_("includeZero")) {
2176 if (maxY
< 0) maxAxisY
= 0;
2177 if (minY
> 0) minAxisY
= 0;
2180 axis
.computedValueRange
= [minAxisY
, maxAxisY
];
2183 // Add ticks. By default, all axes inherit the tick positions of the
2184 // primary axis. However, if an axis is specifically marked as having
2185 // independent ticks, then that is permissible as well.
2186 if (i
== 0 || axis
.independentTicks
) {
2188 Dygraph
.numericTicks(axis
.computedValueRange
[0],
2189 axis
.computedValueRange
[1],
2193 var p_axis
= this.axes_
[0];
2194 var p_ticks
= p_axis
.ticks
;
2195 var p_scale
= p_axis
.computedValueRange
[1] - p_axis
.computedValueRange
[0];
2196 var scale
= axis
.computedValueRange
[1] - axis
.computedValueRange
[0];
2197 var tick_values
= [];
2198 for (var i
= 0; i
< p_ticks
.length
; i
++) {
2199 var y_frac
= (p_ticks
[i
].v
- p_axis
.computedValueRange
[0]) / p_scale
;
2200 var y_val
= axis
.computedValueRange
[0] + y_frac
* scale
;
2201 tick_values
.push(y_val
);
2205 Dygraph
.numericTicks(axis
.computedValueRange
[0],
2206 axis
.computedValueRange
[1],
2207 this, axis
, tick_values
);
2211 return [this.axes_
, this.seriesToAxisMap_
];
2215 * Calculates the rolling average of a data set.
2216 * If originalData is [label, val], rolls the average of those.
2217 * If originalData is [label, [, it's interpreted as [value, stddev]
2218 * and the roll is returned in the same form, with appropriately reduced
2219 * stddev for each value.
2220 * Note that this is where fractional input (i.e. '5/10') is converted into
2222 * @param {Array} originalData The data in the appropriate format (see above)
2223 * @param {Number} rollPeriod The number of days over which to average the data
2225 Dygraph
.prototype.rollingAverage
= function(originalData
, rollPeriod
) {
2226 if (originalData
.length
< 2)
2227 return originalData
;
2228 var rollPeriod
= Math
.min(rollPeriod
, originalData
.length
- 1);
2229 var rollingData
= [];
2230 var sigma
= this.attr_("sigma");
2232 if (this.fractions_
) {
2234 var den
= 0; // numerator/denominator
2236 for (var i
= 0; i
< originalData
.length
; i
++) {
2237 num
+= originalData
[i
][1][0];
2238 den
+= originalData
[i
][1][1];
2239 if (i
- rollPeriod
>= 0) {
2240 num
-= originalData
[i
- rollPeriod
][1][0];
2241 den
-= originalData
[i
- rollPeriod
][1][1];
2244 var date
= originalData
[i
][0];
2245 var value
= den
? num
/ den
: 0.0;
2246 if (this.attr_("errorBars")) {
2247 if (this.wilsonInterval_
) {
2248 // For more details on this confidence interval, see:
2249 // http://en.wikipedia.org/wiki
/Binomial_confidence_interval
2251 var p
= value
< 0 ? 0 : value
, n
= den
;
2252 var pm
= sigma
* Math
.sqrt(p
*(1-p
)/n + sigma*sigma/(4*n
*n
));
2253 var denom
= 1 + sigma
* sigma
/ den
;
2254 var low
= (p
+ sigma
* sigma
/ (2 * den) - pm) / denom
;
2255 var high
= (p
+ sigma
* sigma
/ (2 * den) + pm) / denom
;
2256 rollingData
[i
] = [date
,
2257 [p
* mult
, (p
- low
) * mult
, (high
- p
) * mult
]];
2259 rollingData
[i
] = [date
, [0, 0, 0]];
2262 var stddev
= den
? sigma
* Math
.sqrt(value
* (1 - value
) / den
) : 1.0;
2263 rollingData
[i
] = [date
, [mult
* value
, mult
* stddev
, mult
* stddev
]];
2266 rollingData
[i
] = [date
, mult
* value
];
2269 } else if (this.attr_("customBars")) {
2274 for (var i
= 0; i
< originalData
.length
; i
++) {
2275 var data
= originalData
[i
][1];
2277 rollingData
[i
] = [originalData
[i
][0], [y
, y
- data
[0], data
[2] - y
]];
2279 if (y
!= null && !isNaN(y
)) {
2285 if (i
- rollPeriod
>= 0) {
2286 var prev
= originalData
[i
- rollPeriod
];
2287 if (prev
[1][1] != null && !isNaN(prev
[1][1])) {
2294 rollingData
[i
] = [originalData
[i
][0], [ 1.0 * mid
/ count
,
2295 1.0 * (mid
- low
) / count
,
2296 1.0 * (high
- mid
) / count
]];
2299 // Calculate the rolling average for the first rollPeriod - 1 points where
2300 // there is not enough data to roll over the full number of days
2301 var num_init_points
= Math
.min(rollPeriod
- 1, originalData
.length
- 2);
2302 if (!this.attr_("errorBars")){
2303 if (rollPeriod
== 1) {
2304 return originalData
;
2307 for (var i
= 0; i
< originalData
.length
; i
++) {
2310 for (var j
= Math
.max(0, i
- rollPeriod
+ 1); j
< i
+ 1; j
++) {
2311 var y
= originalData
[j
][1];
2312 if (y
== null || isNaN(y
)) continue;
2314 sum
+= originalData
[j
][1];
2317 rollingData
[i
] = [originalData
[i
][0], sum
/ num_ok
];
2319 rollingData
[i
] = [originalData
[i
][0], null];
2324 for (var i
= 0; i
< originalData
.length
; i
++) {
2328 for (var j
= Math
.max(0, i
- rollPeriod
+ 1); j
< i
+ 1; j
++) {
2329 var y
= originalData
[j
][1][0];
2330 if (y
== null || isNaN(y
)) continue;
2332 sum
+= originalData
[j
][1][0];
2333 variance
+= Math
.pow(originalData
[j
][1][1], 2);
2336 var stddev
= Math
.sqrt(variance
) / num_ok
;
2337 rollingData
[i
] = [originalData
[i
][0],
2338 [sum
/ num_ok
, sigma
* stddev
, sigma
* stddev
]];
2340 rollingData
[i
] = [originalData
[i
][0], [null, null, null]];
2350 * Parses a date, returning the number of milliseconds since epoch. This can be
2351 * passed in as an xValueParser in the Dygraph constructor.
2352 * TODO(danvk): enumerate formats that this understands.
2353 * @param {String} A date in YYYYMMDD format.
2354 * @return {Number} Milliseconds since epoch.
2357 Dygraph
.dateParser
= function(dateStr
, self
) {
2360 if (dateStr
.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12'
2361 dateStrSlashed
= dateStr
.replace("-", "/", "g");
2362 while (dateStrSlashed
.search("-") != -1) {
2363 dateStrSlashed
= dateStrSlashed
.replace("-", "/");
2365 d
= Date
.parse(dateStrSlashed
);
2366 } else if (dateStr
.length
== 8) { // e.g. '20090712'
2367 // TODO(danvk): remove support for this format. It's confusing.
2368 dateStrSlashed
= dateStr
.substr(0,4) + "/" + dateStr
.substr(4,2)
2369 + "/" + dateStr
.substr(6,2);
2370 d
= Date
.parse(dateStrSlashed
);
2372 // Any format that Date.parse will accept, e.g. "2009/07/12" or
2373 // "2009/07/12 12:34:56"
2374 d
= Date
.parse(dateStr
);
2377 if (!d
|| isNaN(d
)) {
2378 self
.error("Couldn't parse " + dateStr
+ " as a date");
2384 * Detects the type of the str (date or numeric) and sets the various
2385 * formatting attributes in this.attrs_ based on this type.
2386 * @param {String} str An x value.
2389 Dygraph
.prototype.detectTypeFromString_
= function(str
) {
2391 if (str
.indexOf('-') >= 0 ||
2392 str
.indexOf('/') >= 0 ||
2393 isNaN(parseFloat(str
))) {
2395 } else if (str
.length
== 8 && str
> '19700101' && str
< '20371231') {
2396 // TODO(danvk): remove support for this format.
2401 this.attrs_
.xValueFormatter
= Dygraph
.dateString_
;
2402 this.attrs_
.xValueParser
= Dygraph
.dateParser
;
2403 this.attrs_
.xTicker
= Dygraph
.dateTicker
;
2404 this.attrs_
.xAxisLabelFormatter
= Dygraph
.dateAxisFormatter
;
2406 this.attrs_
.xValueFormatter
= function(x
) { return x
; };
2407 this.attrs_
.xValueParser
= function(x
) { return parseFloat(x
); };
2408 this.attrs_
.xTicker
= Dygraph
.numericTicks
;
2409 this.attrs_
.xAxisLabelFormatter
= this.attrs_
.xValueFormatter
;
2414 * Parses a string in a special csv format. We expect a csv file where each
2415 * line is a date point, and the first field in each line is the date string.
2416 * We also expect that all remaining fields represent series.
2417 * if the errorBars attribute is set, then interpret the fields as:
2418 * date, series1, stddev1, series2, stddev2, ...
2419 * @param {Array.<Object>} data See above.
2422 * @return Array.<Object> An array with one entry for each row. These entries
2423 * are an array of cells in that row. The first entry is the parsed x-value for
2424 * the row. The second, third, etc. are the y-values. These can take on one of
2425 * three forms, depending on the CSV and constructor parameters:
2427 * 2. [ value, stddev ]
2428 * 3. [ low value, center value, high value ]
2430 Dygraph
.prototype.parseCSV_
= function(data
) {
2432 var lines
= data
.split("\n");
2434 // Use the default delimiter or fall back to a tab if that makes sense.
2435 var delim
= this.attr_('delimiter');
2436 if (lines
[0].indexOf(delim
) == -1 && lines
[0].indexOf('\t') >= 0) {
2441 if (this.labelsFromCSV_
) {
2443 this.attrs_
.labels
= lines
[0].split(delim
);
2446 // Parse the x as a float or return null if it's not a number.
2447 var parseFloatOrNull
= function(x
) {
2448 var val
= parseFloat(x
);
2449 return isNaN(val
) ? null : val
;
2453 var defaultParserSet
= false; // attempt to auto-detect x value type
2454 var expectedCols
= this.attr_("labels").length
;
2455 var outOfOrder
= false;
2456 for (var i
= start
; i
< lines
.length
; i
++) {
2457 var line
= lines
[i
];
2458 if (line
.length
== 0) continue; // skip blank lines
2459 if (line
[0] == '#') continue; // skip comment lines
2460 var inFields
= line
.split(delim
);
2461 if (inFields
.length
< 2) continue;
2464 if (!defaultParserSet
) {
2465 this.detectTypeFromString_(inFields
[0]);
2466 xParser
= this.attr_("xValueParser");
2467 defaultParserSet
= true;
2469 fields
[0] = xParser(inFields
[0], this);
2471 // If fractions are expected, parse the numbers as "A/B
"
2472 if (this.fractions_) {
2473 for (var j = 1; j < inFields.length; j++) {
2474 // TODO(danvk): figure out an appropriate way to flag parse errors.
2475 var vals = inFields[j].split("/");
2476 fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])];
2478 } else if (this.attr_("errorBars
")) {
2479 // If there are error bars, values are (value, stddev) pairs
2480 for (var j = 1; j < inFields.length; j += 2)
2481 fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]),
2482 parseFloatOrNull(inFields[j + 1])];
2483 } else if (this.attr_("customBars
")) {
2484 // Bars are a low;center;high tuple
2485 for (var j = 1; j < inFields.length; j++) {
2486 var vals = inFields[j].split(";");
2487 fields[j] = [ parseFloatOrNull(vals[0]),
2488 parseFloatOrNull(vals[1]),
2489 parseFloatOrNull(vals[2]) ];
2492 // Values are just numbers
2493 for (var j = 1; j < inFields.length; j++) {
2494 fields[j] = parseFloatOrNull(inFields[j]);
2497 if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) {
2502 if (fields.length != expectedCols) {
2503 this.error("Number of columns
in line
" + i + " (" + fields.length +
2504 ") does not agree
with number of
labels (" + expectedCols +
2510 this.warn("CSV is out of order
; order it correctly to speed loading
.");
2511 ret.sort(function(a,b) { return a[0] - b[0] });
2518 * The user has provided their data as a pre-packaged JS array. If the x values
2519 * are numeric, this is the same as dygraphs' internal format. If the x values
2520 * are dates, we need to convert them from Date objects to ms since epoch.
2521 * @param {Array.<Object>} data
2522 * @return {Array.<Object>} data with numeric x values.
2524 Dygraph.prototype.parseArray_ = function(data) {
2525 // Peek at the first x value to see if it's numeric.
2526 if (data.length == 0) {
2527 this.error("Can
't plot empty data set");
2530 if (data[0].length == 0) {
2531 this.error("Data set cannot contain an empty row");
2535 if (this.attr_("labels") == null) {
2536 this.warn("Using default labels. Set labels explicitly via 'labels
' " +
2537 "in the options parameter");
2538 this.attrs_.labels = [ "X" ];
2539 for (var i = 1; i < data[0].length; i++) {
2540 this.attrs_.labels.push("Y" + i);
2544 if (Dygraph.isDateLike(data[0][0])) {
2545 // Some intelligent defaults for a date x-axis.
2546 this.attrs_.xValueFormatter = Dygraph.dateString_;
2547 this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter;
2548 this.attrs_.xTicker = Dygraph.dateTicker;
2550 // Assume they're all dates
.
2551 var parsedData
= Dygraph
.clone(data
);
2552 for (var i
= 0; i
< data
.length
; i
++) {
2553 if (parsedData
[i
].length
== 0) {
2554 this.error("Row " + (1 + i
) + " of data is empty");
2557 if (parsedData
[i
][0] == null
2558 || typeof(parsedData
[i
][0].getTime
) != 'function'
2559 || isNaN(parsedData
[i
][0].getTime())) {
2560 this.error("x value in row " + (1 + i
) + " is not a Date");
2563 parsedData
[i
][0] = parsedData
[i
][0].getTime();
2567 // Some intelligent defaults for a numeric x-axis.
2568 this.attrs_
.xValueFormatter
= function(x
) { return x
; };
2569 this.attrs_
.xTicker
= Dygraph
.numericTicks
;
2575 * Parses a DataTable object from gviz.
2576 * The data is expected to have a first column that is either a date or a
2577 * number. All subsequent columns must be numbers. If there is a clear mismatch
2578 * between this.xValueParser_ and the type of the first column, it will be
2579 * fixed. Fills out rawData_.
2580 * @param {Array.<Object>} data See above.
2583 Dygraph
.prototype.parseDataTable_
= function(data
) {
2584 var cols
= data
.getNumberOfColumns();
2585 var rows
= data
.getNumberOfRows();
2587 var indepType
= data
.getColumnType(0);
2588 if (indepType
== 'date' || indepType
== 'datetime') {
2589 this.attrs_
.xValueFormatter
= Dygraph
.dateString_
;
2590 this.attrs_
.xValueParser
= Dygraph
.dateParser
;
2591 this.attrs_
.xTicker
= Dygraph
.dateTicker
;
2592 this.attrs_
.xAxisLabelFormatter
= Dygraph
.dateAxisFormatter
;
2593 } else if (indepType
== 'number') {
2594 this.attrs_
.xValueFormatter
= function(x
) { return x
; };
2595 this.attrs_
.xValueParser
= function(x
) { return parseFloat(x
); };
2596 this.attrs_
.xTicker
= Dygraph
.numericTicks
;
2597 this.attrs_
.xAxisLabelFormatter
= this.attrs_
.xValueFormatter
;
2599 this.error("only 'date', 'datetime' and 'number' types are supported for " +
2600 "column 1 of DataTable input (Got '" + indepType
+ "')");
2604 // Array of the column indices which contain data (and not annotations).
2606 var annotationCols
= {}; // data index -> [annotation cols]
2607 var hasAnnotations
= false;
2608 for (var i
= 1; i
< cols
; i
++) {
2609 var type
= data
.getColumnType(i
);
2610 if (type
== 'number') {
2612 } else if (type
== 'string' && this.attr_('displayAnnotations')) {
2613 // This is OK -- it's an annotation column.
2614 var dataIdx
= colIdx
[colIdx
.length
- 1];
2615 if (!annotationCols
.hasOwnProperty(dataIdx
)) {
2616 annotationCols
[dataIdx
] = [i
];
2618 annotationCols
[dataIdx
].push(i
);
2620 hasAnnotations
= true;
2622 this.error("Only 'number' is supported as a dependent type with Gviz." +
2623 " 'string' is only supported if displayAnnotations is true");
2627 // Read column labels
2628 // TODO(danvk): add support back for errorBars
2629 var labels
= [data
.getColumnLabel(0)];
2630 for (var i
= 0; i
< colIdx
.length
; i
++) {
2631 labels
.push(data
.getColumnLabel(colIdx
[i
]));
2632 if (this.attr_("errorBars")) i
+= 1;
2634 this.attrs_
.labels
= labels
;
2635 cols
= labels
.length
;
2638 var outOfOrder
= false;
2639 var annotations
= [];
2640 for (var i
= 0; i
< rows
; i
++) {
2642 if (typeof(data
.getValue(i
, 0)) === 'undefined' ||
2643 data
.getValue(i
, 0) === null) {
2644 this.warn("Ignoring row " + i
+
2645 " of DataTable because of undefined or null first column.");
2649 if (indepType
== 'date' || indepType
== 'datetime') {
2650 row
.push(data
.getValue(i
, 0).getTime());
2652 row
.push(data
.getValue(i
, 0));
2654 if (!this.attr_("errorBars")) {
2655 for (var j
= 0; j
< colIdx
.length
; j
++) {
2656 var col
= colIdx
[j
];
2657 row
.push(data
.getValue(i
, col
));
2658 if (hasAnnotations
&&
2659 annotationCols
.hasOwnProperty(col
) &&
2660 data
.getValue(i
, annotationCols
[col
][0]) != null) {
2662 ann
.series
= data
.getColumnLabel(col
);
2664 ann
.shortText
= String
.fromCharCode(65 /* A */ + annotations
.length
)
2666 for (var k
= 0; k
< annotationCols
[col
].length
; k
++) {
2667 if (k
) ann
.text
+= "\n";
2668 ann
.text
+= data
.getValue(i
, annotationCols
[col
][k
]);
2670 annotations
.push(ann
);
2674 for (var j
= 0; j
< cols
- 1; j
++) {
2675 row
.push([ data
.getValue(i
, 1 + 2 * j
), data
.getValue(i
, 2 + 2 * j
) ]);
2678 if (ret
.length
> 0 && row
[0] < ret
[ret
.length
- 1][0]) {
2685 this.warn("DataTable is out of order; order it correctly to speed loading.");
2686 ret
.sort(function(a
,b
) { return a
[0] - b
[0] });
2688 this.rawData_
= ret
;
2690 if (annotations
.length
> 0) {
2691 this.setAnnotations(annotations
, true);
2695 // These functions are all based on MochiKit.
2696 Dygraph
.update
= function (self
, o
) {
2697 if (typeof(o
) != 'undefined' && o
!== null) {
2699 if (o
.hasOwnProperty(k
)) {
2707 Dygraph
.isArrayLike
= function (o
) {
2708 var typ
= typeof(o
);
2710 (typ
!= 'object' && !(typ
== 'function' &&
2711 typeof(o
.item
) == 'function')) ||
2713 typeof(o
.length
) != 'number' ||
2721 Dygraph
.isDateLike
= function (o
) {
2722 if (typeof(o
) != "object" || o
=== null ||
2723 typeof(o
.getTime
) != 'function') {
2729 Dygraph
.clone
= function(o
) {
2730 // TODO(danvk): figure out how MochiKit's version works
2732 for (var i
= 0; i
< o
.length
; i
++) {
2733 if (Dygraph
.isArrayLike(o
[i
])) {
2734 r
.push(Dygraph
.clone(o
[i
]));
2744 * Get the CSV data. If it's in a function, call that function. If it's in a
2745 * file, do an XMLHttpRequest to get it.
2748 Dygraph
.prototype.start_
= function() {
2749 if (typeof this.file_
== 'function') {
2750 // CSV string. Pretend we got it via XHR.
2751 this.loadedEvent_(this.file_());
2752 } else if (Dygraph
.isArrayLike(this.file_
)) {
2753 this.rawData_
= this.parseArray_(this.file_
);
2755 } else if (typeof this.file_
== 'object' &&
2756 typeof this.file_
.getColumnRange
== 'function') {
2757 // must be a DataTable from gviz.
2758 this.parseDataTable_(this.file_
);
2760 } else if (typeof this.file_
== 'string') {
2761 // Heuristic: a newline means it's CSV data. Otherwise it's an URL.
2762 if (this.file_
.indexOf('\n') >= 0) {
2763 this.loadedEvent_(this.file_
);
2765 var req
= new XMLHttpRequest();
2767 req
.onreadystatechange
= function () {
2768 if (req
.readyState
== 4) {
2769 if (req
.status
== 200) {
2770 caller
.loadedEvent_(req
.responseText
);
2775 req
.open("GET", this.file_
, true);
2779 this.error("Unknown data format: " + (typeof this.file_
));
2784 * Changes various properties of the graph. These can include:
2786 * <li>file: changes the source data for the graph</li>
2787 * <li>errorBars: changes whether the data contains stddev</li>
2789 * @param {Object} attrs The new properties and values
2791 Dygraph
.prototype.updateOptions
= function(attrs
) {
2792 // TODO(danvk): this is a mess. Rethink this function.
2793 if ('rollPeriod' in attrs
) {
2794 this.rollPeriod_
= attrs
.rollPeriod
;
2796 if ('dateWindow' in attrs
) {
2797 this.dateWindow_
= attrs
.dateWindow
;
2800 // TODO(danvk): validate per-series options.
2805 // highlightCircleSize
2807 Dygraph
.update(this.user_attrs_
, attrs
);
2808 Dygraph
.update(this.renderOptions_
, attrs
);
2810 this.labelsFromCSV_
= (this.attr_("labels") == null);
2812 // TODO(danvk): this doesn't match the constructor logic
2813 this.layout_
.updateOptions({ 'errorBars': this.attr_("errorBars") });
2814 if (attrs
['file']) {
2815 this.file_
= attrs
['file'];
2823 * Resizes the dygraph. If no parameters are specified, resizes to fill the
2824 * containing div (which has presumably changed size since the dygraph was
2825 * instantiated. If the width/height are specified, the div will be resized.
2827 * This is far more efficient than destroying and re-instantiating a
2828 * Dygraph, since it doesn't have to reparse the underlying data.
2830 * @param {Number} width Width (in pixels)
2831 * @param {Number} height Height (in pixels)
2833 Dygraph
.prototype.resize
= function(width
, height
) {
2834 if (this.resize_lock
) {
2837 this.resize_lock
= true;
2839 if ((width
=== null) != (height
=== null)) {
2840 this.warn("Dygraph.resize() should be called with zero parameters or " +
2841 "two non-NULL parameters. Pretending it was zero.");
2842 width
= height
= null;
2845 // TODO(danvk): there should be a clear() method.
2846 this.maindiv_
.innerHTML
= "";
2847 this.attrs_
.labelsDiv
= null;
2850 this.maindiv_
.style
.width
= width
+ "px";
2851 this.maindiv_
.style
.height
= height
+ "px";
2852 this.width_
= width
;
2853 this.height_
= height
;
2855 this.width_
= this.maindiv_
.offsetWidth
;
2856 this.height_
= this.maindiv_
.offsetHeight
;
2859 this.createInterface_();
2862 this.resize_lock
= false;
2866 * Adjusts the number of days in the rolling average. Updates the graph to
2867 * reflect the new averaging period.
2868 * @param {Number} length Number of days over which to average the data.
2870 Dygraph
.prototype.adjustRoll
= function(length
) {
2871 this.rollPeriod_
= length
;
2876 * Returns a boolean array of visibility statuses.
2878 Dygraph
.prototype.visibility
= function() {
2879 // Do lazy-initialization, so that this happens after we know the number of
2881 if (!this.attr_("visibility")) {
2882 this.attrs_
["visibility"] = [];
2884 while (this.attr_("visibility").length
< this.rawData_
[0].length
- 1) {
2885 this.attr_("visibility").push(true);
2887 return this.attr_("visibility");
2891 * Changes the visiblity of a series.
2893 Dygraph
.prototype.setVisibility
= function(num
, value
) {
2894 var x
= this.visibility();
2895 if (num
< 0 || num
>= x
.length
) {
2896 this.warn("invalid series number in setVisibility: " + num
);
2904 * Update the list of annotations and redraw the chart.
2906 Dygraph
.prototype.setAnnotations
= function(ann
, suppressDraw
) {
2907 // Only add the annotation CSS rule once we know it will be used.
2908 Dygraph
.addAnnotationRule();
2909 this.annotations_
= ann
;
2910 this.layout_
.setAnnotations(this.annotations_
);
2911 if (!suppressDraw
) {
2917 * Return the list of annotations.
2919 Dygraph
.prototype.annotations
= function() {
2920 return this.annotations_
;
2924 * Get the index of a series (column) given its name. The first column is the
2925 * x-axis, so the data series start with index 1.
2927 Dygraph
.prototype.indexFromSetName
= function(name
) {
2928 var labels
= this.attr_("labels");
2929 for (var i
= 0; i
< labels
.length
; i
++) {
2930 if (labels
[i
] == name
) return i
;
2935 Dygraph
.addAnnotationRule
= function() {
2936 if (Dygraph
.addedAnnotationCSS
) return;
2938 var rule
= "border: 1px solid black; " +
2939 "background-color: white; " +
2940 "text-align: center;";
2942 var styleSheetElement
= document
.createElement("style");
2943 styleSheetElement
.type
= "text/css";
2944 document
.getElementsByTagName("head")[0].appendChild(styleSheetElement
);
2946 // Find the first style sheet that we can access.
2947 // We may not add a rule to a style sheet from another domain for security
2948 // reasons. This sometimes comes up when using gviz, since the Google gviz JS
2949 // adds its own style sheets from google.com.
2950 for (var i
= 0; i
< document
.styleSheets
.length
; i
++) {
2951 if (document
.styleSheets
[i
].disabled
) continue;
2952 var mysheet
= document
.styleSheets
[i
];
2954 if (mysheet
.insertRule
) { // Firefox
2955 var idx
= mysheet
.cssRules
? mysheet
.cssRules
.length
: 0;
2956 mysheet
.insertRule(".dygraphDefaultAnnotation { " + rule
+ " }", idx
);
2957 } else if (mysheet
.addRule
) { // IE
2958 mysheet
.addRule(".dygraphDefaultAnnotation", rule
);
2960 Dygraph
.addedAnnotationCSS
= true;
2963 // Was likely a security exception.
2967 this.warn("Unable to add default annotation CSS rule; display may be off.");
2971 * Create a new canvas element. This is more complex than a simple
2972 * document.createElement("canvas") because of IE and excanvas.
2974 Dygraph
.createCanvas
= function() {
2975 var canvas
= document
.createElement("canvas");
2977 isIE
= (/MSIE/.test(navigator
.userAgent
) && !window
.opera
);
2978 if (isIE
&& (typeof(G_vmlCanvasManager
) != 'undefined')) {
2979 canvas
= G_vmlCanvasManager
.initElement(canvas
);
2987 * A wrapper around Dygraph that implements the gviz API.
2988 * @param {Object} container The DOM object the visualization should live in.
2990 Dygraph
.GVizChart
= function(container
) {
2991 this.container
= container
;
2994 Dygraph
.GVizChart
.prototype.draw
= function(data
, options
) {
2995 // Clear out any existing dygraph.
2996 // TODO(danvk): would it make more sense to simply redraw using the current
2997 // date_graph object?
2998 this.container
.innerHTML
= '';
2999 if (typeof(this.date_graph
) != 'undefined') {
3000 this.date_graph
.destroy();
3003 this.date_graph
= new Dygraph(this.container
, data
, options
);
3007 * Google charts compatible setSelection
3008 * Only row selection is supported, all points in the row will be highlighted
3009 * @param {Array} array of the selected cells
3012 Dygraph
.GVizChart
.prototype.setSelection
= function(selection_array
) {
3014 if (selection_array
.length
) {
3015 row
= selection_array
[0].row
;
3017 this.date_graph
.setSelection(row
);
3021 * Google charts compatible getSelection implementation
3022 * @return {Array} array of the selected cells
3025 Dygraph
.GVizChart
.prototype.getSelection
= function() {
3028 var row
= this.date_graph
.getSelection();
3030 if (row
< 0) return selection
;
3033 for (var i
in this.date_graph
.layout_
.datasets
) {
3034 selection
.push({row
: row
, column
: col
});
3041 // Older pages may still use this name.
3042 DateGraph
= Dygraph
;