X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;ds=sidebyside;f=dygraph.js;h=9b4c3bb8bd1cba3724eca00edff2403ceacd7735;hb=bb89f4463bfe972067bd9894421a98ed0563292c;hp=87a28ad97caf2e2caac92d24b152e58b86254be1;hpb=f6885d6a260a7da7c022a2f6472e741013647074;p=dygraphs.git
diff --git a/dygraph.js b/dygraph.js
index 87a28ad..9b4c3bb 100644
--- a/dygraph.js
+++ b/dygraph.js
@@ -3,42 +3,41 @@
/**
* @fileoverview Creates an interactive, zoomable graph based on a CSV file or
- * string. DateGraph can handle multiple series with or without error bars. The
- * date/value ranges will be automatically set. DateGraph uses the
+ * string. Dygraph can handle multiple series with or without error bars. The
+ * date/value ranges will be automatically set. Dygraph uses the
* <canvas> tag, so it only works in FF1.5+.
* @author danvdk@gmail.com (Dan Vanderkam)
Usage:
The CSV file is of the form
+ Date,SeriesA,SeriesB,SeriesC
YYYYMMDD,A1,B1,C1
YYYYMMDD,A2,B2,C2
- If null is passed as the third parameter (series names), then the first line
- of the CSV file is assumed to contain names for each series.
-
If the 'errorBars' option is set in the constructor, the input should be of
the form
+ Date,SeriesA,SeriesB,...
YYYYMMDD,A1,sigmaA1,B1,sigmaB1,...
YYYYMMDD,A2,sigmaA2,B2,sigmaB2,...
If the 'fractions' option is set, the input should be of the form:
+ Date,SeriesA,SeriesB,...
YYYYMMDD,A1/B1,A2/B2,...
YYYYMMDD,A1/B1,A2/B2,...
And error bars will be calculated automatically using a binomial distribution.
- For further documentation and examples, see http://www/~danvk/dg/
+ For further documentation and examples, see http://www.danvk.org/dygraphs
*/
@@ -48,33 +47,91 @@
* returns this data. The expected format for each line is
* YYYYMMDD,val1,val2,... or, if attrs.errorBars is set,
* YYYYMMDD,val1,stddev1,val2,stddev2,...
- * @param {Array.} labels Labels for the data series
* @param {Object} attrs Various other attributes, e.g. errorBars determines
* whether the input data contains error ranges.
*/
-DateGraph = function(div, file, labels, attrs) {
- if (arguments.length > 0)
- this.__init__(div, file, labels, attrs);
+Dygraph = function(div, data, opts) {
+ if (arguments.length > 0) {
+ if (arguments.length == 4) {
+ // Old versions of dygraphs took in the series labels as a constructor
+ // parameter. This doesn't make sense anymore, but it's easy to continue
+ // to support this usage.
+ this.warn("Using deprecated four-argument dygraph constructor");
+ this.__old_init__(div, data, arguments[2], arguments[3]);
+ } else {
+ this.__init__(div, data, opts);
+ }
+ }
};
-DateGraph.NAME = "DateGraph";
-DateGraph.VERSION = "1.1";
-DateGraph.__repr__ = function() {
+Dygraph.NAME = "Dygraph";
+Dygraph.VERSION = "1.2";
+Dygraph.__repr__ = function() {
return "[" + this.NAME + " " + this.VERSION + "]";
};
-DateGraph.toString = function() {
+Dygraph.toString = function() {
return this.__repr__();
};
// Various default values
-DateGraph.DEFAULT_ROLL_PERIOD = 1;
-DateGraph.DEFAULT_WIDTH = 480;
-DateGraph.DEFAULT_HEIGHT = 320;
-DateGraph.DEFAULT_STROKE_WIDTH = 1.0;
-DateGraph.AXIS_LINE_WIDTH = 0.3;
+Dygraph.DEFAULT_ROLL_PERIOD = 1;
+Dygraph.DEFAULT_WIDTH = 480;
+Dygraph.DEFAULT_HEIGHT = 320;
+Dygraph.AXIS_LINE_WIDTH = 0.3;
+
+// Default attribute values.
+Dygraph.DEFAULT_ATTRS = {
+ highlightCircleSize: 3,
+ pixelsPerXLabel: 60,
+ pixelsPerYLabel: 30,
+
+ labelsDivWidth: 250,
+ labelsDivStyles: {
+ // TODO(danvk): move defaults from createStatusMessage_ here.
+ },
+ labelsSeparateLines: false,
+ labelsKMB: false,
+
+ strokeWidth: 1.0,
+
+ axisTickSize: 3,
+ axisLabelFontSize: 14,
+ xAxisLabelWidth: 50,
+ yAxisLabelWidth: 50,
+ rightGap: 5,
+
+ showRoller: false,
+ xValueFormatter: Dygraph.dateString_,
+ xValueParser: Dygraph.dateParser,
+ xTicker: Dygraph.dateTicker,
+
+ sigma: 2.0,
+ errorBars: false,
+ fractions: false,
+ wilsonInterval: true, // only relevant if fractions is true
+ customBars: false
+};
+
+// Various logging levels.
+Dygraph.DEBUG = 1;
+Dygraph.INFO = 2;
+Dygraph.WARNING = 3;
+Dygraph.ERROR = 3;
+
+Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) {
+ // Labels is no longer a constructor parameter, since it's typically set
+ // directly from the data source. It also conains a name for the x-axis,
+ // which the previous constructor form did not.
+ if (labels != null) {
+ var new_labels = ["Date"];
+ for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]);
+ MochiKit.Base.update(attrs, { 'labels': new_labels });
+ }
+ this.__init__(div, file, attrs);
+};
/**
- * Initializes the DateGraph. This creates a new DIV and constructs the PlotKit
+ * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit
* and interaction <canvas> inside of it. See the constructor for details
* on the parameters.
* @param {String | Function} file Source data
@@ -82,63 +139,75 @@ DateGraph.AXIS_LINE_WIDTH = 0.3;
* @param {Object} attrs Miscellaneous other options
* @private
*/
-DateGraph.prototype.__init__ = function(div, file, labels, attrs) {
+Dygraph.prototype.__init__ = function(div, file, attrs) {
+ // Support two-argument constructor
+ if (attrs == null) { attrs = {}; }
+
// Copy the important bits into the object
+ // TODO(danvk): most of these should just stay in the attrs_ dictionary.
this.maindiv_ = div;
- this.labels_ = labels;
this.file_ = file;
- this.rollPeriod_ = attrs.rollPeriod || DateGraph.DEFAULT_ROLL_PERIOD;
+ this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD;
this.previousVerticalX_ = -1;
- this.width_ = parseInt(div.style.width, 10);
- this.height_ = parseInt(div.style.height, 10);
- this.errorBars_ = attrs.errorBars || false;
this.fractions_ = attrs.fractions || false;
- this.strokeWidth_ = attrs.strokeWidth || DateGraph.DEFAULT_STROKE_WIDTH;
this.dateWindow_ = attrs.dateWindow || null;
this.valueRange_ = attrs.valueRange || null;
- this.labelsSeparateLines = attrs.labelsSeparateLines || false;
- this.labelsDiv_ = attrs.labelsDiv || null;
- this.labelsKMB_ = attrs.labelsKMB || false;
- this.minTickSize_ = attrs.minTickSize || 0;
- this.xValueParser_ = attrs.xValueParser || DateGraph.prototype.dateParser;
- this.xValueFormatter_ = attrs.xValueFormatter ||
- DateGraph.prototype.dateString_;
- this.xTicker_ = attrs.xTicker || DateGraph.prototype.dateTicker;
- this.sigma_ = attrs.sigma || 2.0;
this.wilsonInterval_ = attrs.wilsonInterval || true;
this.customBars_ = attrs.customBars || false;
- this.attrs_ = attrs;
- // Make a note of whether labels will be pulled from the CSV file.
- this.labelsFromCSV_ = (this.labels_ == null);
- if (this.labels_ == null)
- this.labels_ = [];
+ // Clear the div. This ensure that, if multiple dygraphs are passed the same
+ // div, then only one will be drawn.
+ div.innerHTML = "";
+
+ // If the div isn't already sized then give it a default size.
+ if (div.style.width == '') {
+ div.style.width = Dygraph.DEFAULT_WIDTH + "px";
+ }
+ if (div.style.height == '') {
+ div.style.height = Dygraph.DEFAULT_HEIGHT + "px";
+ }
+ this.width_ = parseInt(div.style.width, 10);
+ this.height_ = parseInt(div.style.height, 10);
- // Prototype of the callback is "void clickCallback(event, date)"
- this.clickCallback_ = attrs.clickCallback || null;
+ // Dygraphs has many options, some of which interact with one another.
+ // To keep track of everything, we maintain two sets of options:
+ //
+ // this.user_attrs_ only options explicitly set by the user.
+ // this.attrs_ defaults, options derived from user_attrs_, data.
+ //
+ // Options are then accessed this.attr_('attr'), which first looks at
+ // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent
+ // defaults without overriding behavior that the user specifically asks for.
+ this.user_attrs_ = {};
+ MochiKit.Base.update(this.user_attrs_, attrs);
+
+ this.attrs_ = {};
+ MochiKit.Base.update(this.attrs_, Dygraph.DEFAULT_ATTRS);
- // Prototype of zoom callback is "void dragCallback(minDate, maxDate)"
- this.zoomCallback_ = attrs.zoomCallback || null;
+ // Make a note of whether labels will be pulled from the CSV file.
+ this.labelsFromCSV_ = (this.attr_("labels") == null);
// Create the containing DIV and other interactive elements
this.createInterface_();
// Create the PlotKit grapher
- this.layoutOptions_ = { 'errorBars': (this.errorBars_ || this.customBars_),
+ // TODO(danvk): why does the Layout need its own set of options?
+ this.layoutOptions_ = { 'errorBars': (this.attr_("errorBars") ||
+ this.customBars_),
'xOriginIsZero': false };
- MochiKit.Base.update(this.layoutOptions_, attrs);
- this.setColors_(attrs);
+ MochiKit.Base.update(this.layoutOptions_, this.attrs_);
+ MochiKit.Base.update(this.layoutOptions_, this.user_attrs_);
- this.layout_ = new DateGraphLayout(this.layoutOptions_);
+ this.layout_ = new DygraphLayout(this.layoutOptions_);
+ // TODO(danvk): why does the Renderer need its own set of options?
this.renderOptions_ = { colorScheme: this.colors_,
strokeColor: null,
- strokeWidth: this.strokeWidth_,
- axisLabelFontSize: 14,
- axisLineWidth: DateGraph.AXIS_LINE_WIDTH };
- MochiKit.Base.update(this.renderOptions_, attrs);
- this.plotter_ = new DateGraphCanvasRenderer(this.hidden_, this.layout_,
- this.renderOptions_);
+ axisLineWidth: Dygraph.AXIS_LINE_WIDTH };
+ MochiKit.Base.update(this.renderOptions_, this.attrs_);
+ MochiKit.Base.update(this.renderOptions_, this.user_attrs_);
+ this.plotter_ = new DygraphCanvasRenderer(this.hidden_, this.layout_,
+ this.renderOptions_);
this.createStatusMessage_();
this.createRollInterface_();
@@ -148,21 +217,60 @@ DateGraph.prototype.__init__ = function(div, file, labels, attrs) {
this.start_();
};
+Dygraph.prototype.attr_ = function(name) {
+ if (typeof(this.user_attrs_[name]) != 'undefined') {
+ return this.user_attrs_[name];
+ } else if (typeof(this.attrs_[name]) != 'undefined') {
+ return this.attrs_[name];
+ } else {
+ return null;
+ }
+};
+
+// TODO(danvk): any way I can get the line numbers to be this.warn call?
+Dygraph.prototype.log = function(severity, message) {
+ if (typeof(console) != 'undefined') {
+ switch (severity) {
+ case Dygraph.DEBUG:
+ console.debug('dygraphs: ' + message);
+ break;
+ case Dygraph.INFO:
+ console.info('dygraphs: ' + message);
+ break;
+ case Dygraph.WARNING:
+ console.warn('dygraphs: ' + message);
+ break;
+ case Dygraph.ERROR:
+ console.error('dygraphs: ' + message);
+ break;
+ }
+ }
+}
+Dygraph.prototype.info = function(message) {
+ this.log(Dygraph.INFO, message);
+}
+Dygraph.prototype.warn = function(message) {
+ this.log(Dygraph.WARNING, message);
+}
+Dygraph.prototype.error = function(message) {
+ this.log(Dygraph.ERROR, message);
+}
+
/**
* Returns the current rolling period, as set by the user or an option.
* @return {Number} The number of days in the rolling window
*/
-DateGraph.prototype.rollPeriod = function() {
+Dygraph.prototype.rollPeriod = function() {
return this.rollPeriod_;
}
/**
- * Generates interface elements for the DateGraph: a containing div, a div to
+ * Generates interface elements for the Dygraph: a containing div, a div to
* display the current point, and a textbox to adjust the rolling average
* period.
* @private
*/
-DateGraph.prototype.createInterface_ = function() {
+Dygraph.prototype.createInterface_ = function() {
// Create the all-enclosing graph div
var enclosing = this.maindiv_;
@@ -172,10 +280,20 @@ DateGraph.prototype.createInterface_ = function() {
appendChildNodes(enclosing, this.graphDiv);
// Create the canvas to store
+ // We need to subtract out some space for the x- and y-axis labels.
+ // For the x-axis:
+ // - remove from height: (axisTickSize + height of tick label)
+ // height of tick label == axisLabelFontSize?
+ // - remove from width: axisLabelWidth / 2 (maybe on both ends)
+ // For the y-axis:
+ // - remove axisLabelFontSize from the top
+ // - remove axisTickSize from the left
+
var canvas = MochiKit.DOM.CANVAS;
this.canvas_ = canvas( { style: { 'position': 'absolute' },
width: this.width_,
- height: this.height_});
+ height: this.height_
+ });
appendChildNodes(this.graphDiv, this.canvas_);
this.hidden_ = this.createPlotKitCanvas_(this.canvas_);
@@ -185,12 +303,12 @@ DateGraph.prototype.createInterface_ = function() {
/**
* Creates the canvas containing the PlotKit graph. Only plotkit ever draws on
- * this particular canvas. All DateGraph work is done on this.canvas_.
- * @param {Object} canvas The DateGraph canvas to over which to overlay the plot
+ * this particular canvas. All Dygraph work is done on this.canvas_.
+ * @param {Object} canvas The Dygraph canvas over which to overlay the plot
* @return {Object} The newly-created canvas
* @private
*/
-DateGraph.prototype.createPlotKitCanvas_ = function(canvas) {
+Dygraph.prototype.createPlotKitCanvas_ = function(canvas) {
var h = document.createElement("canvas");
h.style.position = "absolute";
h.style.top = canvas.style.top;
@@ -206,25 +324,33 @@ DateGraph.prototype.createPlotKitCanvas_ = function(canvas) {
* color wheel. Saturation/Value are customizable, and the hue is
* equally-spaced around the color wheel. If a custom set of colors is
* specified, that is used instead.
- * @param {Object} attrs Various attributes, e.g. saturation and value
* @private
*/
-DateGraph.prototype.setColors_ = function(attrs) {
- var num = this.labels_.length;
+Dygraph.prototype.setColors_ = function() {
+ // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do
+ // away with this.renderOptions_.
+ var num = this.attr_("labels").length - 1;
this.colors_ = [];
- if (!attrs.colors) {
- var sat = attrs.colorSaturation || 1.0;
- var val = attrs.colorValue || 0.5;
+ var colors = this.attr_('colors');
+ if (!colors) {
+ var sat = this.attr_('colorSaturation') || 1.0;
+ var val = this.attr_('colorValue') || 0.5;
for (var i = 1; i <= num; i++) {
var hue = (1.0*i/(1+num));
this.colors_.push( MochiKit.Color.Color.fromHSV(hue, sat, val) );
}
} else {
for (var i = 0; i < num; i++) {
- var colorStr = attrs.colors[i % attrs.colors.length];
+ var colorStr = colors[i % colors.length];
this.colors_.push( MochiKit.Color.Color.fromString(colorStr) );
}
}
+
+ // TODO(danvk): update this w/r/t/ the new options system.
+ this.renderOptions_.colorScheme = this.colors_;
+ MochiKit.Base.update(this.plotter_.options, this.renderOptions_);
+ MochiKit.Base.update(this.layoutOptions_, this.user_attrs_);
+ MochiKit.Base.update(this.layoutOptions_, this.attrs_);
}
/**
@@ -233,21 +359,23 @@ DateGraph.prototype.setColors_ = function(attrs) {
* been specified.
* @private
*/
-DateGraph.prototype.createStatusMessage_ = function(){
- if (!this.labelsDiv_) {
- var divWidth = 250;
+Dygraph.prototype.createStatusMessage_ = function(){
+ if (!this.attr_("labelsDiv")) {
+ var divWidth = this.attr_('labelsDivWidth');
var messagestyle = { "style": {
"position": "absolute",
"fontSize": "14px",
"zIndex": 10,
"width": divWidth + "px",
"top": "0px",
- "left": this.width_ - divWidth + "px",
+ "left": (this.width_ - divWidth - 2) + "px",
"background": "white",
"textAlign": "left",
"overflow": "hidden"}};
- this.labelsDiv_ = MochiKit.DOM.DIV(messagestyle);
- MochiKit.DOM.appendChildNodes(this.graphDiv, this.labelsDiv_);
+ MochiKit.Base.update(messagestyle["style"], this.attr_('labelsDivStyles'));
+ var div = MochiKit.DOM.DIV(messagestyle);
+ MochiKit.DOM.appendChildNodes(this.graphDiv, div);
+ this.attrs_.labelsDiv = div;
}
};
@@ -256,19 +384,15 @@ DateGraph.prototype.createStatusMessage_ = function(){
* @return {Object} The newly-created text box
* @private
*/
-DateGraph.prototype.createRollInterface_ = function() {
- var padding = this.plotter_.options.padding;
- if (typeof this.attrs_.showRoller == 'undefined') {
- this.attrs_.showRoller = false;
- }
- var display = this.attrs_.showRoller ? "block" : "none";
+Dygraph.prototype.createRollInterface_ = function() {
+ var display = this.attr_('showRoller') ? "block" : "none";
var textAttr = { "type": "text",
"size": "2",
"value": this.rollPeriod_,
"style": { "position": "absolute",
"zIndex": 10,
- "top": (this.height_ - 25 - padding.bottom) + "px",
- "left": (padding.left+1) + "px",
+ "top": (this.plotter_.area.h - 25) + "px",
+ "left": (this.plotter_.area.x + 1) + "px",
"display": display }
};
var roller = MochiKit.DOM.INPUT(textAttr);
@@ -284,7 +408,7 @@ DateGraph.prototype.createRollInterface_ = function() {
* events. Uses MochiKit.Signal to attach all the event handlers.
* @private
*/
-DateGraph.prototype.createDragInterface_ = function() {
+Dygraph.prototype.createDragInterface_ = function() {
var self = this;
// Tracks whether the mouse is down right now
@@ -350,9 +474,10 @@ DateGraph.prototype.createDragInterface_ = function() {
var regionHeight = Math.abs(dragEndY - dragStartY);
if (regionWidth < 2 && regionHeight < 2 &&
- self.clickCallback_ != null &&
+ self.attr_('clickCallback') != null &&
self.lastx_ != undefined) {
- self.clickCallback_(event, new Date(self.lastx_));
+ // TODO(danvk): pass along more info about the point.
+ self.attr_('clickCallback')(event, new Date(self.lastx_));
}
if (regionWidth >= 10) {
@@ -375,8 +500,8 @@ DateGraph.prototype.createDragInterface_ = function() {
self.drawGraph_(self.rawData_);
var minDate = self.rawData_[0][0];
var maxDate = self.rawData_[self.rawData_.length - 1][0];
- if (self.zoomCallback_) {
- self.zoomCallback_(minDate, maxDate);
+ if (self.attr_("zoomCallback")) {
+ self.attr_("zoomCallback")(minDate, maxDate);
}
});
};
@@ -393,7 +518,7 @@ DateGraph.prototype.createDragInterface_ = function() {
* function. Used to avoid excess redrawing
* @private
*/
-DateGraph.prototype.drawZoomRect_ = function(startX, endX, prevEndX) {
+Dygraph.prototype.drawZoomRect_ = function(startX, endX, prevEndX) {
var ctx = this.canvas_.getContext("2d");
// Clean up from the previous rect if necessary
@@ -418,7 +543,7 @@ DateGraph.prototype.drawZoomRect_ = function(startX, endX, prevEndX) {
* @param {Number} highX The rightmost pixel value that should be visible.
* @private
*/
-DateGraph.prototype.doZoom_ = function(lowX, highX) {
+Dygraph.prototype.doZoom_ = function(lowX, highX) {
// Find the earliest and latest dates contained in this canvasx range.
var points = this.layout_.points;
var minDate = null;
@@ -436,8 +561,8 @@ DateGraph.prototype.doZoom_ = function(lowX, highX) {
this.dateWindow_ = [minDate, maxDate];
this.drawGraph_(this.rawData_);
- if (this.zoomCallback_) {
- this.zoomCallback_(minDate, maxDate);
+ if (this.attr_("zoomCallback")) {
+ this.attr_("zoomCallback")(minDate, maxDate);
}
};
@@ -448,7 +573,7 @@ DateGraph.prototype.doZoom_ = function(lowX, highX) {
* @param {Object} event The mousemove event from the browser.
* @private
*/
-DateGraph.prototype.mouseMove_ = function(event) {
+Dygraph.prototype.mouseMove_ = function(event) {
var canvasx = event.mouse().page.x - PlotKit.Base.findPosX(this.hidden_);
var points = this.layout_.points;
@@ -479,7 +604,7 @@ DateGraph.prototype.mouseMove_ = function(event) {
}
// Clear the previously drawn vertical, if there is one
- var circleSize = 3;
+ var circleSize = this.attr_('highlightCircleSize');
var ctx = this.canvas_.getContext("2d");
if (this.previousVerticalX_ >= 0) {
var px = this.previousVerticalX_;
@@ -490,10 +615,10 @@ DateGraph.prototype.mouseMove_ = function(event) {
var canvasx = selPoints[0].canvasx;
// Set the status message to indicate the selected point(s)
- var replace = this.xValueFormatter_(lastx) + ":";
+ var replace = this.attr_('xValueFormatter')(lastx, this) + ":";
var clen = this.colors_.length;
for (var i = 0; i < selPoints.length; i++) {
- if (this.labelsSeparateLines) {
+ if (this.attr_("labelsSeparateLines")) {
replace += " ";
}
var point = selPoints[i];
@@ -501,7 +626,7 @@ DateGraph.prototype.mouseMove_ = function(event) {
+ point.name + ":"
+ this.round_(point.yval, 2);
}
- this.labelsDiv_.innerHTML = replace;
+ this.attr_("labelsDiv").innerHTML = replace;
// Save last x position for callbacks.
this.lastx_ = lastx;
@@ -525,32 +650,60 @@ DateGraph.prototype.mouseMove_ = function(event) {
* @param {Object} event the mouseout event from the browser.
* @private
*/
-DateGraph.prototype.mouseOut_ = function(event) {
+Dygraph.prototype.mouseOut_ = function(event) {
// Get rid of the overlay data
var ctx = this.canvas_.getContext("2d");
ctx.clearRect(0, 0, this.width_, this.height_);
- this.labelsDiv_.innerHTML = "";
+ this.attr_("labelsDiv").innerHTML = "";
};
+Dygraph.zeropad = function(x) {
+ if (x < 10) return "0" + x; else return "" + x;
+}
+
+/**
+ * Return a string version of the hours, minutes and seconds portion of a date.
+ * @param {Number} date The JavaScript date (ms since epoch)
+ * @return {String} A time of the form "HH:MM:SS"
+ * @private
+ */
+Dygraph.prototype.hmsString_ = function(date) {
+ var zeropad = Dygraph.zeropad;
+ var d = new Date(date);
+ if (d.getSeconds()) {
+ return zeropad(d.getHours()) + ":" +
+ zeropad(d.getMinutes()) + ":" +
+ zeropad(d.getSeconds());
+ } else if (d.getMinutes()) {
+ return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes());
+ } else {
+ return zeropad(d.getHours());
+ }
+}
+
/**
* Convert a JS date (millis since epoch) to YYYY/MM/DD
* @param {Number} date The JavaScript date (ms since epoch)
* @return {String} A date of the form "YYYY/MM/DD"
* @private
+ * TODO(danvk): why is this part of the prototype?
*/
-DateGraph.prototype.dateString_ = function(date) {
+Dygraph.dateString_ = function(date, self) {
+ var zeropad = Dygraph.zeropad;
var d = new Date(date);
// Get the year:
var year = "" + d.getFullYear();
// Get a 0 padded month string
- var month = "" + (d.getMonth() + 1); //months are 0-offset, sigh
- if (month.length < 2) month = "0" + month;
+ var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh
// Get a 0 padded day string
- var day = "" + d.getDate();
- if (day.length < 2) day = "0" + day;
+ var day = zeropad(d.getDate());
+
+ var ret = "";
+ var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds();
+ if (frac) ret = " " + self.hmsString_(date);
- return year + "/" + month + "/" + day;
+ return year + "/" + month + "/" + day + ret;
};
/**
@@ -560,7 +713,7 @@ DateGraph.prototype.dateString_ = function(date) {
* @return {Number} The rounded number
* @private
*/
-DateGraph.prototype.round_ = function(num, places) {
+Dygraph.prototype.round_ = function(num, places) {
var shift = Math.pow(10, places);
return Math.round(num * shift)/shift;
};
@@ -570,20 +723,20 @@ DateGraph.prototype.round_ = function(num, places) {
* @param {String} data Raw CSV data to be plotted
* @private
*/
-DateGraph.prototype.loadedEvent_ = function(data) {
+Dygraph.prototype.loadedEvent_ = function(data) {
this.rawData_ = this.parseCSV_(data);
this.drawGraph_(this.rawData_);
};
-DateGraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun",
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
-DateGraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"];
+Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun",
+ "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
+Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"];
/**
* Add ticks on the x-axis representing years, months, quarters, weeks, or days
* @private
*/
-DateGraph.prototype.addXTicks_ = function() {
+Dygraph.prototype.addXTicks_ = function() {
// Determine the correct ticks scale on the x-axis: quarterly, monthly, ...
var startDate, endDate;
if (this.dateWindow_) {
@@ -594,9 +747,128 @@ DateGraph.prototype.addXTicks_ = function() {
endDate = this.rawData_[this.rawData_.length - 1][0];
}
- var xTicks = this.xTicker_(startDate, endDate);
+ var xTicks = this.attr_('xTicker')(startDate, endDate, this);
this.layout_.updateOptions({xTicks: xTicks});
-}
+};
+
+// Time granularity enumeration
+Dygraph.SECONDLY = 0;
+Dygraph.TEN_SECONDLY = 1;
+Dygraph.THIRTY_SECONDLY = 2;
+Dygraph.MINUTELY = 3;
+Dygraph.TEN_MINUTELY = 4;
+Dygraph.THIRTY_MINUTELY = 5;
+Dygraph.HOURLY = 6;
+Dygraph.SIX_HOURLY = 7;
+Dygraph.DAILY = 8;
+Dygraph.WEEKLY = 9;
+Dygraph.MONTHLY = 10;
+Dygraph.QUARTERLY = 11;
+Dygraph.BIANNUAL = 12;
+Dygraph.ANNUAL = 13;
+Dygraph.DECADAL = 14;
+Dygraph.NUM_GRANULARITIES = 15;
+
+Dygraph.SHORT_SPACINGS = [];
+Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1;
+Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10;
+Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30;
+Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60;
+Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10;
+Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30;
+Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600;
+Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600 * 6;
+Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400;
+Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800;
+
+// NumXTicks()
+//
+// If we used this time granularity, how many ticks would there be?
+// This is only an approximation, but it's generally good enough.
+//
+Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) {
+ if (granularity < Dygraph.MONTHLY) {
+ // Generate one tick mark for every fixed interval of time.
+ var spacing = Dygraph.SHORT_SPACINGS[granularity];
+ return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing);
+ } else {
+ var year_mod = 1; // e.g. to only print one point every 10 years.
+ var num_months = 12;
+ if (granularity == Dygraph.QUARTERLY) num_months = 3;
+ if (granularity == Dygraph.BIANNUAL) num_months = 2;
+ if (granularity == Dygraph.ANNUAL) num_months = 1;
+ if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; }
+
+ var msInYear = 365.2524 * 24 * 3600 * 1000;
+ var num_years = 1.0 * (end_time - start_time) / msInYear;
+ return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod);
+ }
+};
+
+// GetXAxis()
+//
+// Construct an x-axis of nicely-formatted times on meaningful boundaries
+// (e.g. 'Jan 09' rather than 'Jan 22, 2009').
+//
+// Returns an array containing {v: millis, label: label} dictionaries.
+//
+Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) {
+ var ticks = [];
+ if (granularity < Dygraph.MONTHLY) {
+ // Generate one tick mark for every fixed interval of time.
+ var spacing = Dygraph.SHORT_SPACINGS[granularity];
+ var format = '%d%b'; // e.g. "1 Jan"
+ // TODO(danvk): be smarter about making sure this really hits a "nice" time.
+ if (granularity < Dygraph.HOURLY) {
+ start_time = spacing * Math.floor(0.5 + start_time / spacing);
+ }
+ for (var t = start_time; t <= end_time; t += spacing) {
+ var d = new Date(t);
+ var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds();
+ if (frac == 0 || granularity >= Dygraph.DAILY) {
+ // the extra hour covers DST problems.
+ ticks.push({ v:t, label: new Date(t + 3600*1000).strftime(format) });
+ } else {
+ ticks.push({ v:t, label: this.hmsString_(t) });
+ }
+ }
+ } else {
+ // Display a tick mark on the first of a set of months of each year.
+ // Years get a tick mark iff y % year_mod == 0. This is useful for
+ // displaying a tick mark once every 10 years, say, on long time scales.
+ var months;
+ var year_mod = 1; // e.g. to only print one point every 10 years.
+
+ if (granularity == Dygraph.MONTHLY) {
+ months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ];
+ } else if (granularity == Dygraph.QUARTERLY) {
+ months = [ 0, 3, 6, 9 ];
+ } else if (granularity == Dygraph.BIANNUAL) {
+ months = [ 0, 6 ];
+ } else if (granularity == Dygraph.ANNUAL) {
+ months = [ 0 ];
+ } else if (granularity == Dygraph.DECADAL) {
+ months = [ 0 ];
+ year_mod = 10;
+ }
+
+ var start_year = new Date(start_time).getFullYear();
+ var end_year = new Date(end_time).getFullYear();
+ var zeropad = Dygraph.zeropad;
+ for (var i = start_year; i <= end_year; i++) {
+ if (i % year_mod != 0) continue;
+ for (var j = 0; j < months.length; j++) {
+ var date_str = i + "/" + zeropad(1 + months[j]) + "/01";
+ var t = Date.parse(date_str);
+ if (t < start_time || t > end_time) continue;
+ ticks.push({ v:t, label: new Date(t).strftime('%b %y') });
+ }
+ }
+ }
+
+ return ticks;
+};
+
/**
* Add ticks to the x-axis based on a date range.
@@ -605,60 +877,21 @@ DateGraph.prototype.addXTicks_ = function() {
* @return {Array.