// TODO(danvk): move defaults from createStatusMessage_ here.
},
labelsSeparateLines: false,
+ labelsShowZeroValues: true,
labelsKMB: false,
+ labelsKMG2: false,
+ showLabelsOnHighlight: true,
+
+ yValueFormatter: function(x) { return Dygraph.round_(x, 2); },
strokeWidth: 1.0,
axisLabelFontSize: 14,
xAxisLabelWidth: 50,
yAxisLabelWidth: 50,
+ xAxisLabelFormatter: Dygraph.dateAxisFormatter,
rightGap: 5,
showRoller: false,
xValueParser: Dygraph.dateParser,
xTicker: Dygraph.dateTicker,
+ delimiter: ',',
+
+ logScale: false,
sigma: 2.0,
errorBars: false,
fractions: false,
wilsonInterval: true, // only relevant if fractions is true
- customBars: false
+ customBars: false,
+ fillGraph: false,
+ fillAlpha: 0.15,
+ connectSeparatedPoints: false,
+
+ stackedGraph: false,
+ hideOverlayOnMouseOut: true,
+
+ stepPlot: false
};
// Various logging levels.
Dygraph.WARNING = 3;
Dygraph.ERROR = 3;
+// Used for initializing annotation CSS rules only once.
+Dygraph.addedAnnotationCSS = false;
+
Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) {
// Labels is no longer a constructor parameter, since it's typically set
// directly from the data source. It also conains a name for the x-axis,
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 });
+ Dygraph.update(attrs, { 'labels': new_labels });
}
this.__init__(div, file, attrs);
};
* 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 {Element} div the Element to render the graph into.
* @param {String | Function} file Source data
- * @param {Array.<String>} labels Names of the data series
* @param {Object} attrs Miscellaneous other options
* @private
*/
this.previousVerticalX_ = -1;
this.fractions_ = attrs.fractions || false;
this.dateWindow_ = attrs.dateWindow || null;
+ // valueRange and valueWindow are similar, but not the same. valueRange is a
+ // locally-stored copy of the attribute. valueWindow starts off the same as
+ // valueRange but is impacted by zoom or pan effects. valueRange is kept
+ // around to restore the original value back to valueRange.
+ // TODO(konigsberg): There are no vertical pan effects yet, but valueWindow
+ // would change accordingly.
this.valueRange_ = attrs.valueRange || null;
+ this.valueWindow_ = this.valueRange_;
+
this.wilsonInterval_ = attrs.wilsonInterval || true;
- this.customBars_ = attrs.customBars || false;
+ this.is_initial_draw_ = true;
+ this.annotations_ = [];
// 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 the div isn't already sized then inherit from our attrs or
+ // give it a default size.
if (div.style.width == '') {
- div.style.width = Dygraph.DEFAULT_WIDTH + "px";
+ div.style.width = attrs.width || Dygraph.DEFAULT_WIDTH + "px";
}
if (div.style.height == '') {
- div.style.height = Dygraph.DEFAULT_HEIGHT + "px";
+ div.style.height = attrs.height || Dygraph.DEFAULT_HEIGHT + "px";
}
this.width_ = parseInt(div.style.width, 10);
this.height_ = parseInt(div.style.height, 10);
+ // The div might have been specified as percent of the current window size,
+ // convert that to an appropriate number of pixels.
+ if (div.style.width.indexOf("%") == div.style.width.length - 1) {
+ this.width_ = div.offsetWidth;
+ }
+ if (div.style.height.indexOf("%") == div.style.height.length - 1) {
+ this.height_ = div.offsetHeight;
+ }
+
+ if (this.width_ == 0) {
+ this.error("dygraph has zero width. Please specify a width in pixels.");
+ }
+ if (this.height_ == 0) {
+ this.error("dygraph has zero height. Please specify a height in pixels.");
+ }
+
+ // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_.
+ if (attrs['stackedGraph']) {
+ attrs['fillGraph'] = true;
+ // TODO(nikhilk): Add any other stackedGraph checks here.
+ }
// 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.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);
+ Dygraph.update(this.user_attrs_, attrs);
this.attrs_ = {};
- MochiKit.Base.update(this.attrs_, Dygraph.DEFAULT_ATTRS);
+ Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS);
+
+ this.boundaryIds_ = [];
// Make a note of whether labels will be pulled from the CSV file.
this.labelsFromCSV_ = (this.attr_("labels") == null);
+ Dygraph.addAnnotationRule();
+
// Create the containing DIV and other interactive elements
this.createInterface_();
- // Create the PlotKit grapher
- // 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_, this.attrs_);
- MochiKit.Base.update(this.layoutOptions_, this.user_attrs_);
-
- 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,
- 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_();
- this.createDragInterface_();
-
- // connect(window, 'onload', this, function(e) { this.start_(); });
this.start_();
};
*/
Dygraph.prototype.rollPeriod = function() {
return this.rollPeriod_;
-}
+};
+
+/**
+ * Returns the currently-visible x-range. This can be affected by zooming,
+ * panning or a call to updateOptions.
+ * Returns a two-element array: [left, right].
+ * If the Dygraph has dates on the x-axis, these will be millis since epoch.
+ */
+Dygraph.prototype.xAxisRange = function() {
+ if (this.dateWindow_) return this.dateWindow_;
+
+ // The entire chart is visible.
+ var left = this.rawData_[0][0];
+ var right = this.rawData_[this.rawData_.length - 1][0];
+ return [left, right];
+};
+
+/**
+ * Returns the currently-visible y-range. This can be affected by zooming,
+ * panning or a call to updateOptions.
+ * Returns a two-element array: [bottom, top].
+ */
+Dygraph.prototype.yAxisRange = function() {
+ return this.displayedYRange_;
+};
+
+/**
+ * Convert from data coordinates to canvas/div X/Y coordinates.
+ * Returns a two-element array: [X, Y]
+ */
+Dygraph.prototype.toDomCoords = function(x, y) {
+ var ret = [null, null];
+ var area = this.plotter_.area;
+ if (x !== null) {
+ var xRange = this.xAxisRange();
+ ret[0] = area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w;
+ }
+
+ if (y !== null) {
+ var yRange = this.yAxisRange();
+ ret[1] = area.y + (yRange[1] - y) / (yRange[1] - yRange[0]) * area.h;
+ }
+
+ return ret;
+};
+
+// TODO(danvk): use these functions throughout dygraphs.
+/**
+ * Convert from canvas/div coords to data coordinates.
+ * Returns a two-element array: [X, Y]
+ */
+Dygraph.prototype.toDataCoords = function(x, y) {
+ var ret = [null, null];
+ var area = this.plotter_.area;
+ if (x !== null) {
+ var xRange = this.xAxisRange();
+ ret[0] = xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]);
+ }
+
+ if (y !== null) {
+ var yRange = this.yAxisRange();
+ ret[1] = yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]);
+ }
+
+ return ret;
+};
+
+/**
+ * Returns the number of columns (including the independent variable).
+ */
+Dygraph.prototype.numColumns = function() {
+ return this.rawData_[0].length;
+};
+
+/**
+ * Returns the number of rows (excluding any header/label row).
+ */
+Dygraph.prototype.numRows = function() {
+ return this.rawData_.length;
+};
+
+/**
+ * Returns the value in the given row and column. If the row and column exceed
+ * the bounds on the data, returns null. Also returns null if the value is
+ * missing.
+ */
+Dygraph.prototype.getValue = function(row, col) {
+ if (row < 0 || row > this.rawData_.length) return null;
+ if (col < 0 || col > this.rawData_[row].length) return null;
+
+ return this.rawData_[row][col];
+};
+
+Dygraph.addEvent = function(el, evt, fn) {
+ var normed_fn = function(e) {
+ if (!e) var e = window.event;
+ fn(e);
+ };
+ if (window.addEventListener) { // Mozilla, Netscape, Firefox
+ el.addEventListener(evt, normed_fn, false);
+ } else { // IE
+ el.attachEvent('on' + evt, normed_fn);
+ }
+};
+
+Dygraph.clipCanvas_ = function(cnv, clip) {
+ var ctx = cnv.getContext("2d");
+ ctx.beginPath();
+ ctx.rect(clip.left, clip.top, clip.width, clip.height);
+ ctx.clip();
+};
/**
* 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.
+ * period. Also creates the Renderer/Layout elements.
* @private
*/
Dygraph.prototype.createInterface_ = function() {
// Create the all-enclosing graph div
var enclosing = this.maindiv_;
- this.graphDiv = MochiKit.DOM.DIV( { style: { 'width': this.width_ + "px",
- 'height': this.height_ + "px"
- }});
- 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_
- });
- appendChildNodes(this.graphDiv, this.canvas_);
-
+ this.graphDiv = document.createElement("div");
+ this.graphDiv.style.width = this.width_ + "px";
+ this.graphDiv.style.height = this.height_ + "px";
+ enclosing.appendChild(this.graphDiv);
+
+ var clip = {
+ top: 0,
+ left: this.attr_("yAxisLabelWidth") + 2 * this.attr_("axisTickSize")
+ };
+ clip.width = this.width_ - clip.left - this.attr_("rightGap");
+ clip.height = this.height_ - this.attr_("axisLabelFontSize")
+ - 2 * this.attr_("axisTickSize");
+ this.clippingArea_ = clip;
+
+ // Create the canvas for interactive parts of the chart.
+ this.canvas_ = Dygraph.createCanvas();
+ this.canvas_.style.position = "absolute";
+ this.canvas_.width = this.width_;
+ this.canvas_.height = this.height_;
+ this.canvas_.style.width = this.width_ + "px"; // for IE
+ this.canvas_.style.height = this.height_ + "px"; // for IE
+
+ // ... and for static parts of the chart.
this.hidden_ = this.createPlotKitCanvas_(this.canvas_);
- connect(this.hidden_, 'onmousemove', this, function(e) { this.mouseMove_(e) });
- connect(this.hidden_, 'onmouseout', this, function(e) { this.mouseOut_(e) });
-}
+
+ // The interactive parts of the graph are drawn on top of the chart.
+ this.graphDiv.appendChild(this.hidden_);
+ this.graphDiv.appendChild(this.canvas_);
+ this.mouseEventElement_ = this.canvas_;
+
+ // Make sure we don't overdraw.
+ Dygraph.clipCanvas_(this.hidden_, this.clippingArea_);
+ Dygraph.clipCanvas_(this.canvas_, this.clippingArea_);
+
+ var dygraph = this;
+ Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) {
+ dygraph.mouseMove_(e);
+ });
+ Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) {
+ dygraph.mouseOut_(e);
+ });
+
+ // Create the grapher
+ // TODO(danvk): why does the Layout need its own set of options?
+ this.layoutOptions_ = { 'xOriginIsZero': false };
+ Dygraph.update(this.layoutOptions_, this.attrs_);
+ Dygraph.update(this.layoutOptions_, this.user_attrs_);
+ Dygraph.update(this.layoutOptions_, {
+ 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) });
+
+ this.layout_ = new DygraphLayout(this, this.layoutOptions_);
+
+ // TODO(danvk): why does the Renderer need its own set of options?
+ this.renderOptions_ = { colorScheme: this.colors_,
+ strokeColor: null,
+ axisLineWidth: Dygraph.AXIS_LINE_WIDTH };
+ Dygraph.update(this.renderOptions_, this.attrs_);
+ Dygraph.update(this.renderOptions_, this.user_attrs_);
+ this.plotter_ = new DygraphCanvasRenderer(this,
+ this.hidden_, this.layout_,
+ this.renderOptions_);
+
+ this.createStatusMessage_();
+ this.createRollInterface_();
+ this.createDragInterface_();
+};
+
+/**
+ * Detach DOM elements in the dygraph and null out all data references.
+ * Calling this when you're done with a dygraph can dramatically reduce memory
+ * usage. See, e.g., the tests/perf.html example.
+ */
+Dygraph.prototype.destroy = function() {
+ var removeRecursive = function(node) {
+ while (node.hasChildNodes()) {
+ removeRecursive(node.firstChild);
+ node.removeChild(node.firstChild);
+ }
+ };
+ removeRecursive(this.maindiv_);
+
+ var nullOut = function(obj) {
+ for (var n in obj) {
+ if (typeof(obj[n]) === 'object') {
+ obj[n] = null;
+ }
+ }
+ };
+
+ // These may not all be necessary, but it can't hurt...
+ nullOut(this.layout_);
+ nullOut(this.plotter_);
+ nullOut(this);
+};
/**
* Creates the canvas containing the PlotKit graph. Only plotkit ever draws on
* @private
*/
Dygraph.prototype.createPlotKitCanvas_ = function(canvas) {
- var h = document.createElement("canvas");
+ var h = Dygraph.createCanvas();
h.style.position = "absolute";
+ // TODO(danvk): h should be offset from canvas. canvas needs to include
+ // some extra area to make it easier to zoom in on the far left and far
+ // right. h needs to be precisely the plot area, so that clipping occurs.
h.style.top = canvas.style.top;
h.style.left = canvas.style.left;
h.width = this.width_;
h.height = this.height_;
- MochiKit.DOM.appendChildNodes(this.graphDiv, h);
+ h.style.width = this.width_ + "px"; // for IE
+ h.style.height = this.height_ + "px"; // for IE
return h;
};
+// Taken from MochiKit.Color
+Dygraph.hsvToRGB = function (hue, saturation, value) {
+ var red;
+ var green;
+ var blue;
+ if (saturation === 0) {
+ red = value;
+ green = value;
+ blue = value;
+ } else {
+ var i = Math.floor(hue * 6);
+ var f = (hue * 6) - i;
+ var p = value * (1 - saturation);
+ var q = value * (1 - (saturation * f));
+ var t = value * (1 - (saturation * (1 - f)));
+ switch (i) {
+ case 1: red = q; green = value; blue = p; break;
+ case 2: red = p; green = value; blue = t; break;
+ case 3: red = p; green = q; blue = value; break;
+ case 4: red = t; green = p; blue = value; break;
+ case 5: red = value; green = p; blue = q; break;
+ case 6: // fall through
+ case 0: red = value; green = t; blue = p; break;
+ }
+ }
+ red = Math.floor(255 * red + 0.5);
+ green = Math.floor(255 * green + 0.5);
+ blue = Math.floor(255 * blue + 0.5);
+ return 'rgb(' + red + ',' + green + ',' + blue + ')';
+};
+
+
/**
* Generate a set of distinct colors for the data series. This is done with a
* color wheel. Saturation/Value are customizable, and the hue is
if (!colors) {
var sat = this.attr_('colorSaturation') || 1.0;
var val = this.attr_('colorValue') || 0.5;
+ var half = Math.ceil(num / 2);
for (var i = 1; i <= num; i++) {
- var hue = (1.0*i/(1+num));
- this.colors_.push( MochiKit.Color.Color.fromHSV(hue, sat, val) );
+ if (!this.visibility()[i-1]) continue;
+ // alternate colors for high contrast.
+ var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2);
+ var hue = (1.0 * idx/ (1 + num));
+ this.colors_.push(Dygraph.hsvToRGB(hue, sat, val));
}
} else {
for (var i = 0; i < num; i++) {
+ if (!this.visibility()[i]) continue;
var colorStr = colors[i % colors.length];
- this.colors_.push( MochiKit.Color.Color.fromString(colorStr) );
+ this.colors_.push(colorStr);
}
}
- // TODO(danvk): update this w/r/t/ the new options system.
+ // 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_);
+ Dygraph.update(this.plotter_.options, this.renderOptions_);
+ Dygraph.update(this.layoutOptions_, this.user_attrs_);
+ Dygraph.update(this.layoutOptions_, this.attrs_);
}
/**
+ * Return the list of colors. This is either the list of colors passed in the
+ * attributes, or the autogenerated list of rgb(r,g,b) strings.
+ * @return {Array<string>} The list of colors.
+ */
+Dygraph.prototype.getColors = function() {
+ return this.colors_;
+};
+
+// The following functions are from quirksmode.org with a modification for Safari from
+// http://blog.firetree.net/2005/07/04/javascript-find-position/
+// http://www.quirksmode.org/js/findpos.html
+Dygraph.findPosX = function(obj) {
+ var curleft = 0;
+ if(obj.offsetParent)
+ while(1)
+ {
+ curleft += obj.offsetLeft;
+ if(!obj.offsetParent)
+ break;
+ obj = obj.offsetParent;
+ }
+ else if(obj.x)
+ curleft += obj.x;
+ return curleft;
+};
+
+Dygraph.findPosY = function(obj) {
+ var curtop = 0;
+ if(obj.offsetParent)
+ while(1)
+ {
+ curtop += obj.offsetTop;
+ if(!obj.offsetParent)
+ break;
+ obj = obj.offsetParent;
+ }
+ else if(obj.y)
+ curtop += obj.y;
+ return curtop;
+};
+
+
+
+/**
* Create the div that contains information on the selected point(s)
* This goes in the top right of the canvas, unless an external div has already
* been specified.
* @private
*/
-Dygraph.prototype.createStatusMessage_ = function(){
+Dygraph.prototype.createStatusMessage_ = function() {
+ var userLabelsDiv = this.user_attrs_["labelsDiv"];
+ if (userLabelsDiv && null != userLabelsDiv
+ && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) {
+ this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv);
+ }
if (!this.attr_("labelsDiv")) {
var divWidth = this.attr_('labelsDivWidth');
- var messagestyle = { "style": {
+ var messagestyle = {
"position": "absolute",
"fontSize": "14px",
"zIndex": 10,
"left": (this.width_ - divWidth - 2) + "px",
"background": "white",
"textAlign": "left",
- "overflow": "hidden"}};
- MochiKit.Base.update(messagestyle["style"], this.attr_('labelsDivStyles'));
- var div = MochiKit.DOM.DIV(messagestyle);
- MochiKit.DOM.appendChildNodes(this.graphDiv, div);
+ "overflow": "hidden"};
+ Dygraph.update(messagestyle, this.attr_('labelsDivStyles'));
+ var div = document.createElement("div");
+ for (var name in messagestyle) {
+ if (messagestyle.hasOwnProperty(name)) {
+ div.style[name] = messagestyle[name];
+ }
+ }
+ this.graphDiv.appendChild(div);
this.attrs_.labelsDiv = div;
}
};
*/
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.plotter_.area.h - 25) + "px",
- "left": (this.plotter_.area.x + 1) + "px",
- "display": display }
+ var textAttr = { "position": "absolute",
+ "zIndex": 10,
+ "top": (this.plotter_.area.h - 25) + "px",
+ "left": (this.plotter_.area.x + 1) + "px",
+ "display": display
};
- var roller = MochiKit.DOM.INPUT(textAttr);
+ var roller = document.createElement("input");
+ roller.type = "text";
+ roller.size = "2";
+ roller.value = this.rollPeriod_;
+ for (var name in textAttr) {
+ if (textAttr.hasOwnProperty(name)) {
+ roller.style[name] = textAttr[name];
+ }
+ }
+
var pa = this.graphDiv;
- MochiKit.DOM.appendChildNodes(pa, roller);
- connect(roller, 'onchange', this,
- function() { this.adjustRoll(roller.value); });
+ pa.appendChild(roller);
+ var dygraph = this;
+ roller.onchange = function() { dygraph.adjustRoll(roller.value); };
return roller;
-}
+};
+
+// These functions are taken from MochiKit.Signal
+Dygraph.pageX = function(e) {
+ if (e.pageX) {
+ return (!e.pageX || e.pageX < 0) ? 0 : e.pageX;
+ } else {
+ var de = document;
+ var b = document.body;
+ return e.clientX +
+ (de.scrollLeft || b.scrollLeft) -
+ (de.clientLeft || 0);
+ }
+};
+
+Dygraph.pageY = function(e) {
+ if (e.pageY) {
+ return (!e.pageY || e.pageY < 0) ? 0 : e.pageY;
+ } else {
+ var de = document;
+ var b = document.body;
+ return e.clientY +
+ (de.scrollTop || b.scrollTop) -
+ (de.clientTop || 0);
+ }
+};
/**
* Set up all the mouse handlers needed to capture dragging behavior for zoom
- * events. Uses MochiKit.Signal to attach all the event handlers.
+ * events.
* @private
*/
Dygraph.prototype.createDragInterface_ = function() {
var self = this;
// Tracks whether the mouse is down right now
- var mouseDown = false;
+ var isZooming = false;
+ var isPanning = false;
var dragStartX = null;
var dragStartY = null;
var dragEndX = null;
var dragEndY = null;
var prevEndX = null;
+ var prevEndY = null;
+ var prevDragDirection = null;
+ var draggingDate = null;
+ var dateRange = null;
// Utility function to convert page-wide coordinates to canvas coords
var px = 0;
var py = 0;
- var getX = function(e) { return e.mouse().page.x - px };
- var getY = function(e) { return e.mouse().page.y - py };
+ var getX = function(e) { return Dygraph.pageX(e) - px };
+ var getY = function(e) { return Dygraph.pageY(e) - py };
// Draw zoom rectangles when the mouse is down and the user moves around
- connect(this.hidden_, 'onmousemove', function(event) {
- if (mouseDown) {
+ Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(event) {
+ if (isZooming) {
dragEndX = getX(event);
dragEndY = getY(event);
- self.drawZoomRect_(dragStartX, dragEndX, prevEndX);
+ var xDelta = Math.abs(dragStartX - dragEndX);
+ var yDelta = Math.abs(dragStartY - dragEndY);
+ var dragDirection = (xDelta < yDelta) ? "V" : "H";
+
+ self.drawZoomRect_(dragDirection, dragStartX, dragEndX, dragStartY, dragEndY,
+ prevDragDirection, prevEndX, prevEndY);
+
prevEndX = dragEndX;
+ prevEndY = dragEndY;
+ prevDragDirection = dragDirection;
+ } else if (isPanning) {
+ dragEndX = getX(event);
+ dragEndY = getY(event);
+
+ // Want to have it so that:
+ // 1. draggingDate appears at dragEndX
+ // 2. daterange = (dateWindow_[1] - dateWindow_[0]) is unaltered.
+
+ self.dateWindow_[0] = draggingDate - (dragEndX / self.width_) * dateRange;
+ self.dateWindow_[1] = self.dateWindow_[0] + dateRange;
+ self.drawGraph_(self.rawData_);
}
});
// Track the beginning of drag events
- connect(this.hidden_, 'onmousedown', function(event) {
- mouseDown = true;
- px = PlotKit.Base.findPosX(self.canvas_);
- py = PlotKit.Base.findPosY(self.canvas_);
+ Dygraph.addEvent(this.mouseEventElement_, 'mousedown', function(event) {
+ px = Dygraph.findPosX(self.canvas_);
+ py = Dygraph.findPosY(self.canvas_);
dragStartX = getX(event);
dragStartY = getY(event);
+
+ if (event.altKey || event.shiftKey) {
+ // TODO(konigsberg): Support vertical panning.
+ if (!self.dateWindow_) return; // have to be zoomed in to pan.
+ isPanning = true;
+ dateRange = self.dateWindow_[1] - self.dateWindow_[0];
+ draggingDate = (dragStartX / self.width_) * dateRange +
+ self.dateWindow_[0];
+ } else {
+ isZooming = true;
+ }
});
// If the user releases the mouse button during a drag, but not over the
// canvas, then it doesn't count as a zooming action.
- connect(document, 'onmouseup', this, function(event) {
- if (mouseDown) {
- mouseDown = false;
+ Dygraph.addEvent(document, 'mouseup', function(event) {
+ if (isZooming || isPanning) {
+ isZooming = false;
dragStartX = null;
dragStartY = null;
}
+
+ if (isPanning) {
+ isPanning = false;
+ draggingDate = null;
+ dateRange = null;
+ }
});
// Temporarily cancel the dragging event when the mouse leaves the graph
- connect(this.hidden_, 'onmouseout', this, function(event) {
- if (mouseDown) {
+ Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(event) {
+ if (isZooming) {
dragEndX = null;
dragEndY = null;
}
// If the mouse is released on the canvas during a drag event, then it's a
// zoom. Only do the zoom if it's over a large enough area (>= 10 pixels)
- connect(this.hidden_, 'onmouseup', this, function(event) {
- if (mouseDown) {
- mouseDown = false;
+ Dygraph.addEvent(this.mouseEventElement_, 'mouseup', function(event) {
+ if (isZooming) {
+ isZooming = false;
dragEndX = getX(event);
dragEndY = getY(event);
var regionWidth = Math.abs(dragEndX - dragStartX);
var regionHeight = Math.abs(dragEndY - dragStartY);
if (regionWidth < 2 && regionHeight < 2 &&
- self.attr_('clickCallback') != null &&
- self.lastx_ != undefined) {
- // TODO(danvk): pass along more info about the point.
- self.attr_('clickCallback')(event, new Date(self.lastx_));
+ self.lastx_ != undefined && self.lastx_ != -1) {
+ // TODO(danvk): pass along more info about the points, e.g. 'x'
+ if (self.attr_('clickCallback') != null) {
+ self.attr_('clickCallback')(event, self.lastx_, self.selPoints_);
+ }
+ if (self.attr_('pointClickCallback')) {
+ // check if the click was on a particular point.
+ var closestIdx = -1;
+ var closestDistance = 0;
+ for (var i = 0; i < self.selPoints_.length; i++) {
+ var p = self.selPoints_[i];
+ var distance = Math.pow(p.canvasx - dragEndX, 2) +
+ Math.pow(p.canvasy - dragEndY, 2);
+ if (closestIdx == -1 || distance < closestDistance) {
+ closestDistance = distance;
+ closestIdx = i;
+ }
+ }
+
+ // Allow any click within two pixels of the dot.
+ var radius = self.attr_('highlightCircleSize') + 2;
+ if (closestDistance <= 5 * 5) {
+ self.attr_('pointClickCallback')(event, self.selPoints_[closestIdx]);
+ }
+ }
}
- if (regionWidth >= 10) {
- self.doZoom_(Math.min(dragStartX, dragEndX),
+ if (regionWidth >= 10 && regionWidth > regionHeight) {
+ self.doZoomX_(Math.min(dragStartX, dragEndX),
Math.max(dragStartX, dragEndX));
+ } else if (regionHeight >= 10 && regionHeight > regionWidth){
+ self.doZoomY_(Math.min(dragStartY, dragEndY),
+ Math.max(dragStartY, dragEndY));
} else {
self.canvas_.getContext("2d").clearRect(0, 0,
self.canvas_.width,
dragStartX = null;
dragStartY = null;
}
+
+ if (isPanning) {
+ isPanning = false;
+ draggingDate = null;
+ dateRange = null;
+ }
});
// Double-clicking zooms back out
- connect(this.hidden_, 'ondblclick', this, function(event) {
- self.dateWindow_ = null;
- self.drawGraph_(self.rawData_);
- var minDate = self.rawData_[0][0];
- var maxDate = self.rawData_[self.rawData_.length - 1][0];
- if (self.attr_("zoomCallback")) {
- self.attr_("zoomCallback")(minDate, maxDate);
- }
+ Dygraph.addEvent(this.mouseEventElement_, 'dblclick', function(event) {
+ // Disable zooming out if panning.
+ if (event.altKey || event.shiftKey) return;
+
+ self.doUnzoom_();
});
};
* up any previous zoom rectangles that were drawn. This could be optimized to
* avoid extra redrawing, but it's tricky to avoid interactions with the status
* dots.
+ *
+ * @param {String} direction the direction of the zoom rectangle. "H" and "V"
+ * for Horizontal and Vertical.
* @param {Number} startX The X position where the drag started, in canvas
* coordinates.
* @param {Number} endX The current X position of the drag, in canvas coords.
+ * @param {Number} startY The Y position where the drag started, in canvas
+ * coordinates.
+ * @param {Number} endY The current Y position of the drag, in canvas coords.
+ * @param {String} prevDirection the value of direction on the previous call to
+ * this function. Used to avoid excess redrawing
* @param {Number} prevEndX The value of endX on the previous call to this
* function. Used to avoid excess redrawing
+ * @param {Number} prevEndY The value of endY on the previous call to this
+ * function. Used to avoid excess redrawing
* @private
*/
-Dygraph.prototype.drawZoomRect_ = function(startX, endX, prevEndX) {
+Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, endY,
+ prevDirection, prevEndX, prevEndY) {
var ctx = this.canvas_.getContext("2d");
// Clean up from the previous rect if necessary
- if (prevEndX) {
+ if (prevDirection == "H") {
ctx.clearRect(Math.min(startX, prevEndX), 0,
Math.abs(startX - prevEndX), this.height_);
+ } else if (prevDirection == "V"){
+ ctx.clearRect(0, Math.min(startY, prevEndY),
+ this.width_, Math.abs(startY - prevEndY));
}
// Draw a light-grey rectangle to show the new viewing area
- if (endX && startX) {
- ctx.fillStyle = "rgba(128,128,128,0.33)";
- ctx.fillRect(Math.min(startX, endX), 0,
- Math.abs(endX - startX), this.height_);
+ if (direction == "H") {
+ if (endX && startX) {
+ ctx.fillStyle = "rgba(128,128,128,0.33)";
+ ctx.fillRect(Math.min(startX, endX), 0,
+ Math.abs(endX - startX), this.height_);
+ }
+ }
+ if (direction == "V") {
+ if (endY && startY) {
+ ctx.fillStyle = "rgba(128,128,128,0.33)";
+ ctx.fillRect(0, Math.min(startY, endY),
+ this.width_, Math.abs(endY - startY));
+ }
}
};
/**
- * Zoom to something containing [lowX, highX]. These are pixel coordinates
- * in the canvas. The exact zoom window may be slightly larger if there are no
- * data points near lowX or highX. This function redraws the graph.
+ * Zoom to something containing [lowX, highX]. These are pixel coordinates in
+ * the canvas. The exact zoom window may be slightly larger if there are no data
+ * points near lowX or highX. Don't confuse this function with doZoomXDates,
+ * which accepts dates that match the raw data. This function redraws the graph.
+ *
* @param {Number} lowX The leftmost pixel value that should be visible.
* @param {Number} highX The rightmost pixel value that should be visible.
* @private
*/
-Dygraph.prototype.doZoom_ = function(lowX, highX) {
+Dygraph.prototype.doZoomX_ = function(lowX, highX) {
// Find the earliest and latest dates contained in this canvasx range.
- var points = this.layout_.points;
- var minDate = null;
- var maxDate = null;
- // Find the nearest [minDate, maxDate] that contains [lowX, highX]
- for (var i = 0; i < points.length; i++) {
- var cx = points[i].canvasx;
- var x = points[i].xval;
- if (cx < lowX && (minDate == null || x > minDate)) minDate = x;
- if (cx > highX && (maxDate == null || x < maxDate)) maxDate = x;
- }
- // Use the extremes if either is missing
- if (minDate == null) minDate = points[0].xval;
- if (maxDate == null) maxDate = points[points.length-1].xval;
+ // Convert the call to date ranges of the raw data.
+ var r = this.toDataCoords(lowX, null);
+ var minDate = r[0];
+ r = this.toDataCoords(highX, null);
+ var maxDate = r[0];
+ this.doZoomXDates_(minDate, maxDate);
+};
+/**
+ * Zoom to something containing [minDate, maxDate] values. Don't confuse this
+ * method with doZoomX which accepts pixel coordinates. This function redraws
+ * the graph.
+ *
+ * @param {Number} minDate The minimum date that should be visible.
+ * @param {Number} maxDate The maximum date that should be visible.
+ * @private
+ */
+Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) {
this.dateWindow_ = [minDate, maxDate];
this.drawGraph_(this.rawData_);
if (this.attr_("zoomCallback")) {
- this.attr_("zoomCallback")(minDate, maxDate);
+ var yRange = this.yAxisRange();
+ this.attr_("zoomCallback")(minDate, maxDate, yRange[0], yRange[1]);
+ }
+};
+
+/**
+ * Zoom to something containing [lowY, highY]. These are pixel coordinates in
+ * the canvas. The exact zoom window may be slightly larger if there are no
+ * data points near lowY or highY. Don't confuse this function with
+ * doZoomYValues, which accepts parameters that match the raw data. This
+ * function redraws the graph.
+ *
+ * @param {Number} lowY The topmost pixel value that should be visible.
+ * @param {Number} highY The lowest pixel value that should be visible.
+ * @private
+ */
+Dygraph.prototype.doZoomY_ = function(lowY, highY) {
+ // Find the highest and lowest values in pixel range.
+ var r = this.toDataCoords(null, lowY);
+ var maxValue = r[1];
+ r = this.toDataCoords(null, highY);
+ var minValue = r[1];
+
+ this.doZoomYValues_(minValue, maxValue);
+};
+
+/**
+ * Zoom to something containing [minValue, maxValue] values. Don't confuse this
+ * method with doZoomY which accepts pixel coordinates. This function redraws
+ * the graph.
+ *
+ * @param {Number} minValue The minimum Value that should be visible.
+ * @param {Number} maxValue The maximum value that should be visible.
+ * @private
+ */
+Dygraph.prototype.doZoomYValues_ = function(minValue, maxValue) {
+ this.valueWindow_ = [minValue, maxValue];
+ this.drawGraph_(this.rawData_);
+ if (this.attr_("zoomCallback")) {
+ var xRange = this.xAxisRange();
+ this.attr_("zoomCallback")(xRange[0], xRange[1], minValue, maxValue);
+ }
+};
+
+/**
+ * Reset the zoom to the original view coordinates. This is the same as
+ * double-clicking on the graph.
+ *
+ * @private
+ */
+Dygraph.prototype.doUnzoom_ = function() {
+ var dirty = null;
+ if (this.dateWindow_ != null) {
+ dirty = 1;
+ this.dateWindow_ = null;
+ }
+ if (this.valueWindow_ != null) {
+ dirty = 1;
+ this.valueWindow_ = this.valueRange_;
+ }
+
+ if (dirty) {
+ // Putting the drawing operation before the callback because it resets
+ // yAxisRange.
+ this.drawGraph_(this.rawData_);
+ if (this.attr_("zoomCallback")) {
+ var minDate = this.rawData_[0][0];
+ var maxDate = this.rawData_[this.rawData_.length - 1][0];
+ var minValue = this.yAxisRange()[0];
+ var maxValue = this.yAxisRange()[1];
+ this.attr_("zoomCallback")(minDate, maxDate, minValue, maxValue);
+ }
}
};
* @private
*/
Dygraph.prototype.mouseMove_ = function(event) {
- var canvasx = event.mouse().page.x - PlotKit.Base.findPosX(this.hidden_);
+ var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_);
var points = this.layout_.points;
var lastx = -1;
var idx = -1;
for (var i = 0; i < points.length; i++) {
var dist = Math.abs(points[i].canvasx - canvasx);
- if (dist > minDist) break;
+ if (dist > minDist) continue;
minDist = dist;
idx = i;
}
lastx = points[points.length-1].xval;
// Extract the points we've selected
- var selPoints = [];
- for (var i = 0; i < points.length; i++) {
- if (points[i].xval == lastx) {
- selPoints.push(points[i]);
+ this.selPoints_ = [];
+ var l = points.length;
+ if (!this.attr_("stackedGraph")) {
+ for (var i = 0; i < l; i++) {
+ if (points[i].xval == lastx) {
+ this.selPoints_.push(points[i]);
+ }
+ }
+ } else {
+ // Need to 'unstack' points starting from the bottom
+ var cumulative_sum = 0;
+ for (var i = l - 1; i >= 0; i--) {
+ if (points[i].xval == lastx) {
+ var p = {}; // Clone the point since we modify it
+ for (var k in points[i]) {
+ p[k] = points[i][k];
+ }
+ p.yval -= cumulative_sum;
+ cumulative_sum += p.yval;
+ this.selPoints_.push(p);
+ }
}
+ this.selPoints_.reverse();
}
+ if (this.attr_("highlightCallback")) {
+ var px = this.lastx_;
+ if (px !== null && lastx != px) {
+ // only fire if the selected point has changed.
+ this.attr_("highlightCallback")(event, lastx, this.selPoints_);
+ }
+ }
+
+ // Save last x position for callbacks.
+ this.lastx_ = lastx;
+
+ this.updateSelection_();
+};
+
+/**
+ * Draw dots over the selectied points in the data series. This function
+ * takes care of cleanup of previously-drawn dots.
+ * @private
+ */
+Dygraph.prototype.updateSelection_ = function() {
// Clear the previously drawn vertical, if there is one
var circleSize = this.attr_('highlightCircleSize');
var ctx = this.canvas_.getContext("2d");
ctx.clearRect(px - circleSize - 1, 0, 2 * circleSize + 2, this.height_);
}
- if (selPoints.length > 0) {
- var canvasx = selPoints[0].canvasx;
+ var isOK = function(x) { return x && !isNaN(x); };
+
+ if (this.selPoints_.length > 0) {
+ var canvasx = this.selPoints_[0].canvasx;
// Set the status message to indicate the selected point(s)
- var replace = this.attr_('xValueFormatter')(lastx, this) + ":";
+ var replace = this.attr_('xValueFormatter')(this.lastx_, this) + ":";
+ var fmtFunc = this.attr_('yValueFormatter');
var clen = this.colors_.length;
- for (var i = 0; i < selPoints.length; i++) {
- if (this.attr_("labelsSeparateLines")) {
- replace += "<br/>";
+
+ if (this.attr_('showLabelsOnHighlight')) {
+ // Set the status message to indicate the selected point(s)
+ for (var i = 0; i < this.selPoints_.length; i++) {
+ if (!this.attr_("labelsShowZeroValues") && this.selPoints_[i].yval == 0) continue;
+ if (!isOK(this.selPoints_[i].canvasy)) continue;
+ if (this.attr_("labelsSeparateLines")) {
+ replace += "<br/>";
+ }
+ var point = this.selPoints_[i];
+ var c = new RGBColor(this.colors_[i%clen]);
+ var yval = fmtFunc(point.yval);
+ replace += " <b><font color='" + c.toHex() + "'>"
+ + point.name + "</font></b>:"
+ + yval;
}
- var point = selPoints[i];
- replace += " <b><font color='" + this.colors_[i%clen].toHexString() + "'>"
- + point.name + "</font></b>:"
- + this.round_(point.yval, 2);
- }
- this.attr_("labelsDiv").innerHTML = replace;
- // Save last x position for callbacks.
- this.lastx_ = lastx;
+ this.attr_("labelsDiv").innerHTML = replace;
+ }
// Draw colored circles over the center of each selected point
- ctx.save()
- for (var i = 0; i < selPoints.length; i++) {
+ ctx.save();
+ for (var i = 0; i < this.selPoints_.length; i++) {
+ if (!isOK(this.selPoints_[i].canvasy)) continue;
ctx.beginPath();
- ctx.fillStyle = this.colors_[i%clen].toRGBString();
- ctx.arc(canvasx, selPoints[i%clen].canvasy, circleSize, 0, 360, false);
+ ctx.fillStyle = this.plotter_.colors[this.selPoints_[i].name];
+ ctx.arc(canvasx, this.selPoints_[i].canvasy, circleSize,
+ 0, 2 * Math.PI, false);
ctx.fill();
}
ctx.restore();
};
/**
+ * Set manually set selected dots, and display information about them
+ * @param int row number that should by highlighted
+ * false value clears the selection
+ * @public
+ */
+Dygraph.prototype.setSelection = function(row) {
+ // Extract the points we've selected
+ this.selPoints_ = [];
+ var pos = 0;
+
+ if (row !== false) {
+ row = row-this.boundaryIds_[0][0];
+ }
+
+ if (row !== false && row >= 0) {
+ for (var i in this.layout_.datasets) {
+ if (row < this.layout_.datasets[i].length) {
+ this.selPoints_.push(this.layout_.points[pos+row]);
+ }
+ pos += this.layout_.datasets[i].length;
+ }
+ }
+
+ if (this.selPoints_.length) {
+ this.lastx_ = this.selPoints_[0].xval;
+ this.updateSelection_();
+ } else {
+ this.lastx_ = -1;
+ this.clearSelection();
+ }
+
+};
+
+/**
* The mouse has left the canvas. Clear out whatever artifacts remain
* @param {Object} event the mouseout event from the browser.
* @private
*/
Dygraph.prototype.mouseOut_ = function(event) {
+ if (this.attr_("unhighlightCallback")) {
+ this.attr_("unhighlightCallback")(event);
+ }
+
+ if (this.attr_("hideOverlayOnMouseOut")) {
+ this.clearSelection();
+ }
+};
+
+/**
+ * Remove all selection from the canvas
+ * @public
+ */
+Dygraph.prototype.clearSelection = function() {
// Get rid of the overlay data
var ctx = this.canvas_.getContext("2d");
ctx.clearRect(0, 0, this.width_, this.height_);
this.attr_("labelsDiv").innerHTML = "";
-};
+ this.selPoints_ = [];
+ this.lastx_ = -1;
+}
+
+/**
+ * Returns the number of the currently selected row
+ * @return int row number, of -1 if nothing is selected
+ * @public
+ */
+Dygraph.prototype.getSelection = function() {
+ if (!this.selPoints_ || this.selPoints_.length < 1) {
+ return -1;
+ }
+
+ for (var row=0; row<this.layout_.points.length; row++ ) {
+ if (this.layout_.points[row].x == this.selPoints_[0].x) {
+ return row + this.boundaryIds_[0][0];
+ }
+ }
+ return -1;
+}
Dygraph.zeropad = function(x) {
if (x < 10) return "0" + x; else return "" + x;
* @return {String} A time of the form "HH:MM:SS"
* @private
*/
-Dygraph.prototype.hmsString_ = function(date) {
+Dygraph.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()) {
+ } else {
return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes());
+ }
+}
+
+/**
+ * Convert a JS date to a string appropriate to display on an axis that
+ * is displaying values at the stated granularity.
+ * @param {Date} date The date to format
+ * @param {Number} granularity One of the Dygraph granularity constants
+ * @return {String} The formatted date
+ * @private
+ */
+Dygraph.dateAxisFormatter = function(date, granularity) {
+ if (granularity >= Dygraph.MONTHLY) {
+ return date.strftime('%b %y');
} else {
- return zeropad(d.getHours());
+ var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds();
+ if (frac == 0 || granularity >= Dygraph.DAILY) {
+ return new Date(date.getTime() + 3600*1000).strftime('%d%b');
+ } else {
+ return Dygraph.hmsString_(date.getTime());
+ }
}
}
* @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?
*/
Dygraph.dateString_ = function(date, self) {
var zeropad = Dygraph.zeropad;
var ret = "";
var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds();
- if (frac) ret = " " + self.hmsString_(date);
+ if (frac) ret = " " + Dygraph.hmsString_(date);
return year + "/" + month + "/" + day + ret;
};
* @return {Number} The rounded number
* @private
*/
-Dygraph.prototype.round_ = function(num, places) {
+Dygraph.round_ = function(num, places) {
var shift = Math.pow(10, places);
return Math.round(num * shift)/shift;
};
// 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.TWO_SECONDLY = 1;
+Dygraph.FIVE_SECONDLY = 2;
+Dygraph.TEN_SECONDLY = 3;
+Dygraph.THIRTY_SECONDLY = 4;
+Dygraph.MINUTELY = 5;
+Dygraph.TWO_MINUTELY = 6;
+Dygraph.FIVE_MINUTELY = 7;
+Dygraph.TEN_MINUTELY = 8;
+Dygraph.THIRTY_MINUTELY = 9;
+Dygraph.HOURLY = 10;
+Dygraph.TWO_HOURLY = 11;
+Dygraph.SIX_HOURLY = 12;
+Dygraph.DAILY = 13;
+Dygraph.WEEKLY = 14;
+Dygraph.MONTHLY = 15;
+Dygraph.QUARTERLY = 16;
+Dygraph.BIANNUAL = 17;
+Dygraph.ANNUAL = 18;
+Dygraph.DECADAL = 19;
+Dygraph.NUM_GRANULARITIES = 20;
Dygraph.SHORT_SPACINGS = [];
Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1;
+Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2;
+Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5;
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.TWO_MINUTELY] = 1000 * 60 * 2;
+Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5;
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.TWO_HOURLY] = 1000 * 3600 * 2;
+Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6;
Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400;
Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800;
// Returns an array containing {v: millis, label: label} dictionaries.
//
Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) {
+ var formatter = this.attr_("xAxisLabelFormatter");
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) });
+ var format = '%d%b'; // e.g. "1Jan"
+
+ // Find a time less than start_time which occurs on a "nice" time boundary
+ // for this granularity.
+ var g = spacing / 1000;
+ var d = new Date(start_time);
+ if (g <= 60) { // seconds
+ var x = d.getSeconds(); d.setSeconds(x - x % g);
+ } else {
+ d.setSeconds(0);
+ g /= 60;
+ if (g <= 60) { // minutes
+ var x = d.getMinutes(); d.setMinutes(x - x % g);
} else {
- ticks.push({ v:t, label: this.hmsString_(t) });
+ d.setMinutes(0);
+ g /= 60;
+
+ if (g <= 24) { // days
+ var x = d.getHours(); d.setHours(x - x % g);
+ } else {
+ d.setHours(0);
+ g /= 24;
+
+ if (g == 7) { // one week
+ d.setDate(d.getDate() - d.getDay());
+ }
+ }
}
}
+ start_time = d.getTime();
+
+ for (var t = start_time; t <= end_time; t += spacing) {
+ ticks.push({ v:t, label: formatter(new Date(t), granularity) });
+ }
} 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
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') });
+ ticks.push({ v:t, label: formatter(new Date(t), granularity) });
}
}
}
// Try labels every 1, 2, 5, 10, 20, 50, 100, etc.
// Calculate the resulting tick spacing (i.e. this.height_ / nTicks).
// The first spacing greater than pixelsPerYLabel is what we use.
- var mults = [1, 2, 5];
+ // TODO(danvk): version that works on a log scale.
+ if (self.attr_("labelsKMG2")) {
+ var mults = [1, 2, 4, 8];
+ } else {
+ var mults = [1, 2, 5];
+ }
var scale, low_val, high_val, nTicks;
// TODO(danvk): make it possible to set this for x- and y-axes independently.
var pixelsPerTick = self.attr_('pixelsPerYLabel');
for (var i = -10; i < 50; i++) {
- var base_scale = Math.pow(10, i);
+ if (self.attr_("labelsKMG2")) {
+ var base_scale = Math.pow(16, i);
+ } else {
+ var base_scale = Math.pow(10, i);
+ }
for (var j = 0; j < mults.length; j++) {
scale = base_scale * mults[j];
low_val = Math.floor(minV / scale) * scale;
high_val = Math.ceil(maxV / scale) * scale;
- nTicks = (high_val - low_val) / scale;
+ nTicks = Math.abs(high_val - low_val) / scale;
var spacing = self.height_ / nTicks;
// wish I could break out of both loops at once...
if (spacing > pixelsPerTick) break;
// Construct labels for the ticks
var ticks = [];
+ var k;
+ var k_labels = [];
+ if (self.attr_("labelsKMB")) {
+ k = 1000;
+ k_labels = [ "K", "M", "B", "T" ];
+ }
+ if (self.attr_("labelsKMG2")) {
+ if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!");
+ k = 1024;
+ k_labels = [ "k", "M", "G", "T" ];
+ }
+
+ // Allow reverse y-axis if it's explicitly requested.
+ if (low_val > high_val) scale *= -1;
+
for (var i = 0; i < nTicks; i++) {
var tickV = low_val + i * scale;
- var label = self.round_(tickV, 2);
- if (self.attr_("labelsKMB")) {
- var k = 1000;
- if (tickV >= k*k*k) {
- label = self.round_(tickV/(k*k*k), 1) + "B";
- } else if (tickV >= k*k) {
- label = self.round_(tickV/(k*k), 1) + "M";
- } else if (tickV >= k) {
- label = self.round_(tickV/k, 1) + "K";
+ var absTickV = Math.abs(tickV);
+ var label = Dygraph.round_(tickV, 2);
+ if (k_labels.length) {
+ // Round up to an appropriate unit.
+ var n = k*k*k*k;
+ for (var j = 3; j >= 0; j--, n /= k) {
+ if (absTickV >= n) {
+ label = Dygraph.round_(tickV / n, 1) + k_labels[j];
+ break;
+ }
}
}
ticks.push( {label: label, v: tickV} );
yTicks: ticks } );
};
+// Computes the range of the data series (including confidence intervals).
+// series is either [ [x1, y1], [x2, y2], ... ] or
+// [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ...
+// Returns [low, high]
+Dygraph.prototype.extremeValues_ = function(series) {
+ var minY = null, maxY = null;
+
+ var bars = this.attr_("errorBars") || this.attr_("customBars");
+ if (bars) {
+ // With custom bars, maxY is the max of the high values.
+ for (var j = 0; j < series.length; j++) {
+ var y = series[j][1][0];
+ if (!y) continue;
+ var low = y - series[j][1][1];
+ var high = y + series[j][1][2];
+ if (low > y) low = y; // this can happen with custom bars,
+ if (high < y) high = y; // e.g. in tests/custom-bars.html
+ if (maxY == null || high > maxY) {
+ maxY = high;
+ }
+ if (minY == null || low < minY) {
+ minY = low;
+ }
+ }
+ } else {
+ for (var j = 0; j < series.length; j++) {
+ var y = series[j][1];
+ if (y === null || isNaN(y)) continue;
+ if (maxY == null || y > maxY) {
+ maxY = y;
+ }
+ if (minY == null || y < minY) {
+ minY = y;
+ }
+ }
+ }
+
+ return [minY, maxY];
+};
+
/**
* Update the graph with new data. Data is in the format
* [ [date1, val1, val2, ...], [date2, val1, val2, ...] if errorBars=false
* @private
*/
Dygraph.prototype.drawGraph_ = function(data) {
+ // This is used to set the second parameter to drawCallback, below.
+ var is_initial_draw = this.is_initial_draw_;
+ this.is_initial_draw_ = false;
+
var minY = null, maxY = null;
this.layout_.removeAllDatasets();
this.setColors_();
+ this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize');
+
+ var connectSeparatedPoints = this.attr_('connectSeparatedPoints');
+
+ // Loop over the fields (series). Go from the last to the first,
+ // because if they're stacked that's how we accumulate the values.
+
+ var cumulative_y = []; // For stacked series.
+ var datasets = [];
+
+ // Loop over all fields and create datasets
+ for (var i = data[0].length - 1; i >= 1; i--) {
+ if (!this.visibility()[i - 1]) continue;
- // Loop over all fields in the dataset
- for (var i = 1; i < data[0].length; i++) {
var series = [];
for (var j = 0; j < data.length; j++) {
- var date = data[j][0];
- series[j] = [date, data[j][i]];
+ if (data[j][i] != null || !connectSeparatedPoints) {
+ var date = data[j][0];
+ series.push([date, data[j][i]]);
+ }
}
series = this.rollingAverage(series, this.rollPeriod_);
// Prune down to the desired range, if necessary (for zooming)
- var bars = this.attr_("errorBars") || this.customBars_;
+ // Because there can be lines going to points outside of the visible area,
+ // we actually prune to visible points, plus one on either side.
+ var bars = this.attr_("errorBars") || this.attr_("customBars");
if (this.dateWindow_) {
var low = this.dateWindow_[0];
var high= this.dateWindow_[1];
var pruned = [];
+ // TODO(danvk): do binary search instead of linear search.
+ // TODO(danvk): pass firstIdx and lastIdx directly to the renderer.
+ var firstIdx = null, lastIdx = null;
for (var k = 0; k < series.length; k++) {
- if (series[k][0] >= low && series[k][0] <= high) {
- pruned.push(series[k]);
- var y = bars ? series[k][1][0] : series[k][1];
- if (maxY == null || y > maxY) maxY = y;
- if (minY == null || y < minY) minY = y;
+ if (series[k][0] >= low && firstIdx === null) {
+ firstIdx = k;
}
+ if (series[k][0] <= high) {
+ lastIdx = k;
+ }
+ }
+ if (firstIdx === null) firstIdx = 0;
+ if (firstIdx > 0) firstIdx--;
+ if (lastIdx === null) lastIdx = series.length - 1;
+ if (lastIdx < series.length - 1) lastIdx++;
+ this.boundaryIds_[i-1] = [firstIdx, lastIdx];
+ for (var k = firstIdx; k <= lastIdx; k++) {
+ pruned.push(series[k]);
}
series = pruned;
} else {
- if (!this.customBars_) {
- for (var j = 0; j < series.length; j++) {
- var y = bars ? series[j][1][0] : series[j][1];
- if (maxY == null || y > maxY) {
- maxY = bars ? y + series[j][1][1] : y;
- }
- if (minY == null || y < minY) {
- minY = bars ? y + series[j][1][1] : y;
- }
- }
- } else {
- // With custom bars, maxY is the max of the high values.
- for (var j = 0; j < series.length; j++) {
- var y = series[j][1][0];
- var high = series[j][1][2];
- if (high > y) y = high;
- if (maxY == null || y > maxY) {
- maxY = y;
- }
- if (minY == null || y < minY) {
- minY = y;
- }
- }
- }
+ this.boundaryIds_[i-1] = [0, series.length-1];
}
+ var extremes = this.extremeValues_(series);
+ var thisMinY = extremes[0];
+ var thisMaxY = extremes[1];
+ if (minY === null || thisMinY < minY) minY = thisMinY;
+ if (maxY === null || thisMaxY > maxY) maxY = thisMaxY;
+
if (bars) {
- var vals = [];
- for (var j=0; j<series.length; j++)
- vals[j] = [series[j][0],
- series[j][1][0], series[j][1][1], series[j][1][2]];
- this.layout_.addDataset(this.attr_("labels")[i], vals);
- } else {
- this.layout_.addDataset(this.attr_("labels")[i], series);
+ for (var j=0; j<series.length; j++) {
+ val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]];
+ series[j] = val;
+ }
+ } else if (this.attr_("stackedGraph")) {
+ var l = series.length;
+ var actual_y;
+ for (var j = 0; j < l; j++) {
+ // If one data set has a NaN, let all subsequent stacked
+ // sets inherit the NaN -- only start at 0 for the first set.
+ var x = series[j][0];
+ if (cumulative_y[x] === undefined)
+ cumulative_y[x] = 0;
+
+ actual_y = series[j][1];
+ cumulative_y[x] += actual_y;
+
+ series[j] = [x, cumulative_y[x]]
+
+ if (!maxY || cumulative_y[x] > maxY)
+ maxY = cumulative_y[x];
+ }
}
+
+ datasets[i] = series;
+ }
+
+ for (var i = 1; i < datasets.length; i++) {
+ if (!this.visibility()[i - 1]) continue;
+ this.layout_.addDataset(this.attr_("labels")[i], datasets[i]);
}
// Use some heuristics to come up with a good maxY value, unless it's been
- // set explicitly by the user.
- if (this.valueRange_ != null) {
- this.addYTicks_(this.valueRange_[0], this.valueRange_[1]);
+ // set explicitly by the developer or end-user (via drag)
+ if (this.valueWindow_ != null) {
+ this.addYTicks_(this.valueWindow_[0], this.valueWindow_[1]);
+ this.displayedYRange_ = this.valueWindow_;
} else {
+ // This affects the calculation of span, below.
+ if (this.attr_("includeZero") && minY > 0) {
+ minY = 0;
+ }
+
// Add some padding and round up to an integer to be human-friendly.
var span = maxY - minY;
+ // special case: if we have no sense of scale, use +/-10% of the sole value.
+ if (span == 0) { span = maxY; }
var maxAxisY = maxY + 0.1 * span;
var minAxisY = minY - 0.1 * span;
}
this.addYTicks_(minAxisY, maxAxisY);
+ this.displayedYRange_ = [minAxisY, maxAxisY];
}
this.addXTicks_();
// Tell PlotKit to use this new data and render itself
+ this.layout_.updateOptions({dateWindow: this.dateWindow_});
this.layout_.evaluateWithError();
this.plotter_.clear();
this.plotter_.render();
- this.canvas_.getContext('2d').clearRect(0, 0,
- this.canvas_.width, this.canvas_.height);
+ this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width,
+ this.canvas_.height);
+
+ if (this.attr_("drawCallback") !== null) {
+ this.attr_("drawCallback")(this, is_initial_draw);
+ }
};
/**
rollingData[i] = [date, mult * value];
}
}
- } else if (this.customBars_) {
+ } else if (this.attr_("customBars")) {
var low = 0;
var mid = 0;
var high = 0;
var y = data[1];
rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]];
- low += data[0];
- mid += y;
- high += data[2];
- count += 1;
+ if (y != null && !isNaN(y)) {
+ low += data[0];
+ mid += y;
+ high += data[2];
+ count += 1;
+ }
if (i - rollPeriod >= 0) {
var prev = originalData[i - rollPeriod];
- low -= prev[1][0];
- mid -= prev[1][1];
- high -= prev[1][2];
- count -= 1;
+ if (prev[1][1] != null && !isNaN(prev[1][1])) {
+ low -= prev[1][0];
+ mid -= prev[1][1];
+ high -= prev[1][2];
+ count -= 1;
+ }
}
rollingData[i] = [originalData[i][0], [ 1.0 * mid / count,
1.0 * (mid - low) / count,
// there is not enough data to roll over the full number of days
var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2);
if (!this.attr_("errorBars")){
- for (var i = 0; i < num_init_points; i++) {
- var sum = 0;
- for (var j = 0; j < i + 1; j++)
- sum += originalData[j][1];
- rollingData[i] = [originalData[i][0], sum / (i + 1)];
+ if (rollPeriod == 1) {
+ return originalData;
}
- // Calculate the rolling average for the remaining points
- for (var i = Math.min(rollPeriod - 1, originalData.length - 2);
- i < originalData.length;
- i++) {
+
+ for (var i = 0; i < originalData.length; i++) {
var sum = 0;
- for (var j = i - rollPeriod + 1; j < i + 1; j++)
+ var num_ok = 0;
+ for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) {
+ var y = originalData[j][1];
+ if (y == null || isNaN(y)) continue;
+ num_ok++;
sum += originalData[j][1];
- rollingData[i] = [originalData[i][0], sum / rollPeriod];
+ }
+ if (num_ok) {
+ rollingData[i] = [originalData[i][0], sum / num_ok];
+ } else {
+ rollingData[i] = [originalData[i][0], null];
+ }
}
+
} else {
- for (var i = 0; i < num_init_points; i++) {
+ for (var i = 0; i < originalData.length; i++) {
var sum = 0;
var variance = 0;
- for (var j = 0; j < i + 1; j++) {
+ var num_ok = 0;
+ for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) {
+ var y = originalData[j][1][0];
+ if (y == null || isNaN(y)) continue;
+ num_ok++;
sum += originalData[j][1][0];
variance += Math.pow(originalData[j][1][1], 2);
}
- var stddev = Math.sqrt(variance)/(i+1);
- rollingData[i] = [originalData[i][0],
- [sum/(i+1), sigma * stddev, sigma * stddev]];
- }
- // Calculate the rolling average for the remaining points
- for (var i = Math.min(rollPeriod - 1, originalData.length - 2);
- i < originalData.length;
- i++) {
- var sum = 0;
- var variance = 0;
- for (var j = i - rollPeriod + 1; j < i + 1; j++) {
- sum += originalData[j][1][0];
- variance += Math.pow(originalData[j][1][1], 2);
+ if (num_ok) {
+ var stddev = Math.sqrt(variance) / num_ok;
+ rollingData[i] = [originalData[i][0],
+ [sum / num_ok, sigma * stddev, sigma * stddev]];
+ } else {
+ rollingData[i] = [originalData[i][0], [null, null, null]];
}
- var stddev = Math.sqrt(variance) / rollPeriod;
- rollingData[i] = [originalData[i][0],
- [sum / rollPeriod, sigma * stddev, sigma * stddev]];
}
}
}
Dygraph.dateParser = function(dateStr, self) {
var dateStrSlashed;
var d;
- if (dateStr.length == 10 && dateStr.search("-") != -1) { // e.g. '2009-07-12'
+ if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12'
dateStrSlashed = dateStr.replace("-", "/", "g");
while (dateStrSlashed.search("-") != -1) {
dateStrSlashed = dateStrSlashed.replace("-", "/");
this.attrs_.xValueFormatter = Dygraph.dateString_;
this.attrs_.xValueParser = Dygraph.dateParser;
this.attrs_.xTicker = Dygraph.dateTicker;
+ this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter;
} else {
this.attrs_.xValueFormatter = function(x) { return x; };
this.attrs_.xValueParser = function(x) { return parseFloat(x); };
this.attrs_.xTicker = Dygraph.numericTicks;
+ this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter;
}
};
Dygraph.prototype.parseCSV_ = function(data) {
var ret = [];
var lines = data.split("\n");
+
+ // Use the default delimiter or fall back to a tab if that makes sense.
+ var delim = this.attr_('delimiter');
+ if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) {
+ delim = '\t';
+ }
+
var start = 0;
if (this.labelsFromCSV_) {
start = 1;
- this.attrs_.labels = lines[0].split(",");
+ this.attrs_.labels = lines[0].split(delim);
}
+ // Parse the x as a float or return null if it's not a number.
+ var parseFloatOrNull = function(x) {
+ var val = parseFloat(x);
+ return isNaN(val) ? null : val;
+ };
+
var xParser;
var defaultParserSet = false; // attempt to auto-detect x value type
var expectedCols = this.attr_("labels").length;
+ var outOfOrder = false;
for (var i = start; i < lines.length; i++) {
var line = lines[i];
if (line.length == 0) continue; // skip blank lines
- var inFields = line.split(',');
+ if (line[0] == '#') continue; // skip comment lines
+ var inFields = line.split(delim);
if (inFields.length < 2) continue;
var fields = [];
for (var j = 1; j < inFields.length; j++) {
// TODO(danvk): figure out an appropriate way to flag parse errors.
var vals = inFields[j].split("/");
- fields[j] = [parseFloat(vals[0]), parseFloat(vals[1])];
+ fields[j] = [parseFloatOrNull(vals[0]), parseFloatOrNull(vals[1])];
}
} else if (this.attr_("errorBars")) {
// If there are error bars, values are (value, stddev) pairs
for (var j = 1; j < inFields.length; j += 2)
- fields[(j + 1) / 2] = [parseFloat(inFields[j]),
- parseFloat(inFields[j + 1])];
- } else if (this.customBars_) {
+ fields[(j + 1) / 2] = [parseFloatOrNull(inFields[j]),
+ parseFloatOrNull(inFields[j + 1])];
+ } else if (this.attr_("customBars")) {
// Bars are a low;center;high tuple
for (var j = 1; j < inFields.length; j++) {
var vals = inFields[j].split(";");
- fields[j] = [ parseFloat(vals[0]),
- parseFloat(vals[1]),
- parseFloat(vals[2]) ];
+ fields[j] = [ parseFloatOrNull(vals[0]),
+ parseFloatOrNull(vals[1]),
+ parseFloatOrNull(vals[2]) ];
}
} else {
// Values are just numbers
for (var j = 1; j < inFields.length; j++) {
- fields[j] = parseFloat(inFields[j]);
+ fields[j] = parseFloatOrNull(inFields[j]);
}
}
+ if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) {
+ outOfOrder = true;
+ }
ret.push(fields);
if (fields.length != expectedCols) {
") " + line);
}
}
+
+ if (outOfOrder) {
+ this.warn("CSV is out of order; order it correctly to speed loading.");
+ ret.sort(function(a,b) { return a[0] - b[0] });
+ }
+
return ret;
};
}
}
- if (MochiKit.Base.isDateLike(data[0][0])) {
+ if (Dygraph.isDateLike(data[0][0])) {
// Some intelligent defaults for a date x-axis.
this.attrs_.xValueFormatter = Dygraph.dateString_;
+ this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter;
this.attrs_.xTicker = Dygraph.dateTicker;
// Assume they're all dates.
- var parsedData = MochiKit.Base.clone(data);
+ var parsedData = Dygraph.clone(data);
for (var i = 0; i < data.length; i++) {
if (parsedData[i].length == 0) {
- this.error("Row " << (1 + i) << " of data is empty");
+ this.error("Row " + (1 + i) + " of data is empty");
return null;
}
if (parsedData[i][0] == null
- || typeof(parsedData[i][0].getTime) != 'function') {
- this.error("x value in row " << (1 + i) << " is not a Date");
+ || typeof(parsedData[i][0].getTime) != 'function'
+ || isNaN(parsedData[i][0].getTime())) {
+ this.error("x value in row " + (1 + i) + " is not a Date");
return null;
}
parsedData[i][0] = parsedData[i][0].getTime();
* The data is expected to have a first column that is either a date or a
* number. All subsequent columns must be numbers. If there is a clear mismatch
* between this.xValueParser_ and the type of the first column, it will be
- * fixed. Returned value is in the same format as return value of parseCSV_.
+ * fixed. Fills out rawData_.
* @param {Array.<Object>} data See above.
* @private
*/
var cols = data.getNumberOfColumns();
var rows = data.getNumberOfRows();
- // Read column labels
- var labels = [];
- for (var i = 0; i < cols; i++) {
- labels.push(data.getColumnLabel(i));
- }
- this.attrs_.labels = labels;
-
var indepType = data.getColumnType(0);
- if (indepType == 'date') {
+ if (indepType == 'date' || indepType == 'datetime') {
this.attrs_.xValueFormatter = Dygraph.dateString_;
this.attrs_.xValueParser = Dygraph.dateParser;
this.attrs_.xTicker = Dygraph.dateTicker;
+ this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter;
} else if (indepType == 'number') {
this.attrs_.xValueFormatter = function(x) { return x; };
this.attrs_.xValueParser = function(x) { return parseFloat(x); };
this.attrs_.xTicker = Dygraph.numericTicks;
+ this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter;
} else {
- this.error("only 'date' and 'number' types are supported for column 1 " +
- "of DataTable input (Got '" + indepType + "')");
+ this.error("only 'date', 'datetime' and 'number' types are supported for " +
+ "column 1 of DataTable input (Got '" + indepType + "')");
return null;
}
+ // Array of the column indices which contain data (and not annotations).
+ var colIdx = [];
+ var annotationCols = {}; // data index -> [annotation cols]
+ var hasAnnotations = false;
+ for (var i = 1; i < cols; i++) {
+ var type = data.getColumnType(i);
+ if (type == 'number') {
+ colIdx.push(i);
+ } else if (type == 'string' && this.attr_('displayAnnotations')) {
+ // This is OK -- it's an annotation column.
+ var dataIdx = colIdx[colIdx.length - 1];
+ if (!annotationCols.hasOwnProperty(dataIdx)) {
+ annotationCols[dataIdx] = [i];
+ } else {
+ annotationCols[dataIdx].push(i);
+ }
+ hasAnnotations = true;
+ } else {
+ this.error("Only 'number' is supported as a dependent type with Gviz." +
+ " 'string' is only supported if displayAnnotations is true");
+ }
+ }
+
+ // Read column labels
+ // TODO(danvk): add support back for errorBars
+ var labels = [data.getColumnLabel(0)];
+ for (var i = 0; i < colIdx.length; i++) {
+ labels.push(data.getColumnLabel(colIdx[i]));
+ }
+ this.attrs_.labels = labels;
+ cols = labels.length;
+
var ret = [];
+ var outOfOrder = false;
+ var annotations = [];
for (var i = 0; i < rows; i++) {
var row = [];
- if (!data.getValue(i, 0)) continue;
- if (indepType == 'date') {
+ if (typeof(data.getValue(i, 0)) === 'undefined' ||
+ data.getValue(i, 0) === null) {
+ this.warning("Ignoring row " + i +
+ " of DataTable because of undefined or null first column.");
+ continue;
+ }
+
+ if (indepType == 'date' || indepType == 'datetime') {
row.push(data.getValue(i, 0).getTime());
} else {
row.push(data.getValue(i, 0));
}
- var any_data = false;
- for (var j = 1; j < cols; j++) {
- row.push(data.getValue(i, j));
- if (data.getValue(i, j)) any_data = true;
+ if (!this.attr_("errorBars")) {
+ for (var j = 0; j < colIdx.length; j++) {
+ var col = colIdx[j];
+ row.push(data.getValue(i, col));
+ if (hasAnnotations &&
+ annotationCols.hasOwnProperty(col) &&
+ data.getValue(i, annotationCols[col][0]) != null) {
+ var ann = {};
+ ann.series = data.getColumnLabel(col);
+ ann.xval = row[0];
+ ann.shortText = String.fromCharCode(65 /* A */ + annotations.length)
+ ann.text = '';
+ for (var k = 0; k < annotationCols[col].length; k++) {
+ if (k) ann.text += "\n";
+ ann.text += data.getValue(i, annotationCols[col][k]);
+ }
+ annotations.push(ann);
+ }
+ }
+ } else {
+ for (var j = 0; j < cols - 1; j++) {
+ row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]);
+ }
}
- if (any_data) ret.push(row);
+ if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) {
+ outOfOrder = true;
+ }
+ ret.push(row);
+ }
+
+ if (outOfOrder) {
+ this.warn("DataTable is out of order; order it correctly to speed loading.");
+ ret.sort(function(a,b) { return a[0] - b[0] });
+ }
+ this.rawData_ = ret;
+
+ if (annotations.length > 0) {
+ this.setAnnotations(annotations, true);
}
- return ret;
}
+// These functions are all based on MochiKit.
+Dygraph.update = function (self, o) {
+ if (typeof(o) != 'undefined' && o !== null) {
+ for (var k in o) {
+ if (o.hasOwnProperty(k)) {
+ self[k] = o[k];
+ }
+ }
+ }
+ return self;
+};
+
+Dygraph.isArrayLike = function (o) {
+ var typ = typeof(o);
+ if (
+ (typ != 'object' && !(typ == 'function' &&
+ typeof(o.item) == 'function')) ||
+ o === null ||
+ typeof(o.length) != 'number' ||
+ o.nodeType === 3
+ ) {
+ return false;
+ }
+ return true;
+};
+
+Dygraph.isDateLike = function (o) {
+ if (typeof(o) != "object" || o === null ||
+ typeof(o.getTime) != 'function') {
+ return false;
+ }
+ return true;
+};
+
+Dygraph.clone = function(o) {
+ // TODO(danvk): figure out how MochiKit's version works
+ var r = [];
+ for (var i = 0; i < o.length; i++) {
+ if (Dygraph.isArrayLike(o[i])) {
+ r.push(Dygraph.clone(o[i]));
+ } else {
+ r.push(o[i]);
+ }
+ }
+ return r;
+};
+
+
/**
* Get the CSV data. If it's in a function, call that function. If it's in a
* file, do an XMLHttpRequest to get it.
if (typeof this.file_ == 'function') {
// CSV string. Pretend we got it via XHR.
this.loadedEvent_(this.file_());
- } else if (MochiKit.Base.isArrayLike(this.file_)) {
+ } else if (Dygraph.isArrayLike(this.file_)) {
this.rawData_ = this.parseArray_(this.file_);
this.drawGraph_(this.rawData_);
} else if (typeof this.file_ == 'object' &&
typeof this.file_.getColumnRange == 'function') {
// must be a DataTable from gviz.
- this.rawData_ = this.parseDataTable_(this.file_);
+ this.parseDataTable_(this.file_);
this.drawGraph_(this.rawData_);
} else if (typeof this.file_ == 'string') {
// Heuristic: a newline means it's CSV data. Otherwise it's an URL.
*/
Dygraph.prototype.updateOptions = function(attrs) {
// TODO(danvk): this is a mess. Rethink this function.
- if (attrs.customBars) {
- this.customBars_ = attrs.customBars;
- }
if (attrs.rollPeriod) {
this.rollPeriod_ = attrs.rollPeriod;
}
if (attrs.valueRange) {
this.valueRange_ = attrs.valueRange;
}
- MochiKit.Base.update(this.user_attrs_, attrs);
+ Dygraph.update(this.user_attrs_, attrs);
+ Dygraph.update(this.renderOptions_, attrs);
this.labelsFromCSV_ = (this.attr_("labels") == null);
// TODO(danvk): this doesn't match the constructor logic
this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") });
- if (attrs['file'] && attrs['file'] != this.file_) {
+ if (attrs['file']) {
this.file_ = attrs['file'];
this.start_();
} else {
};
/**
+ * Resizes the dygraph. If no parameters are specified, resizes to fill the
+ * containing div (which has presumably changed size since the dygraph was
+ * instantiated. If the width/height are specified, the div will be resized.
+ *
+ * This is far more efficient than destroying and re-instantiating a
+ * Dygraph, since it doesn't have to reparse the underlying data.
+ *
+ * @param {Number} width Width (in pixels)
+ * @param {Number} height Height (in pixels)
+ */
+Dygraph.prototype.resize = function(width, height) {
+ if (this.resize_lock) {
+ return;
+ }
+ this.resize_lock = true;
+
+ if ((width === null) != (height === null)) {
+ this.warn("Dygraph.resize() should be called with zero parameters or " +
+ "two non-NULL parameters. Pretending it was zero.");
+ width = height = null;
+ }
+
+ // TODO(danvk): there should be a clear() method.
+ this.maindiv_.innerHTML = "";
+ this.attrs_.labelsDiv = null;
+
+ if (width) {
+ this.maindiv_.style.width = width + "px";
+ this.maindiv_.style.height = height + "px";
+ this.width_ = width;
+ this.height_ = height;
+ } else {
+ this.width_ = this.maindiv_.offsetWidth;
+ this.height_ = this.maindiv_.offsetHeight;
+ }
+
+ this.createInterface_();
+ this.drawGraph_(this.rawData_);
+
+ this.resize_lock = false;
+};
+
+/**
* Adjusts the number of days in the rolling average. Updates the graph to
* reflect the new averaging period.
* @param {Number} length Number of days over which to average the data.
this.drawGraph_(this.rawData_);
};
+/**
+ * Returns a boolean array of visibility statuses.
+ */
+Dygraph.prototype.visibility = function() {
+ // Do lazy-initialization, so that this happens after we know the number of
+ // data series.
+ if (!this.attr_("visibility")) {
+ this.attrs_["visibility"] = [];
+ }
+ while (this.attr_("visibility").length < this.rawData_[0].length - 1) {
+ this.attr_("visibility").push(true);
+ }
+ return this.attr_("visibility");
+};
+
+/**
+ * Changes the visiblity of a series.
+ */
+Dygraph.prototype.setVisibility = function(num, value) {
+ var x = this.visibility();
+ if (num < 0 && num >= x.length) {
+ this.warn("invalid series number in setVisibility: " + num);
+ } else {
+ x[num] = value;
+ this.drawGraph_(this.rawData_);
+ }
+};
+
+/**
+ * Update the list of annotations and redraw the chart.
+ */
+Dygraph.prototype.setAnnotations = function(ann, suppressDraw) {
+ this.annotations_ = ann;
+ this.layout_.setAnnotations(this.annotations_);
+ if (!suppressDraw) {
+ this.drawGraph_(this.rawData_);
+ }
+};
+
+/**
+ * Return the list of annotations.
+ */
+Dygraph.prototype.annotations = function() {
+ return this.annotations_;
+};
+
+Dygraph.addAnnotationRule = function() {
+ if (Dygraph.addedAnnotationCSS) return;
+
+ var mysheet;
+ if (document.styleSheets.length > 0) {
+ mysheet = document.styleSheets[0];
+ } else {
+ var styleSheetElement = document.createElement("style");
+ styleSheetElement.type = "text/css";
+ document.getElementsByTagName("head")[0].appendChild(styleSheetElement);
+ for(i = 0; i < document.styleSheets.length; i++) {
+ if (document.styleSheets[i].disabled) continue;
+ mysheet = document.styleSheets[i];
+ }
+ }
+
+ var rule = "border: 1px solid black; " +
+ "background-color: white; " +
+ "text-align: center;";
+ if (mysheet.insertRule) { // Firefox
+ mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", 0);
+ } else if (mysheet.addRule) { // IE
+ mysheet.addRule(".dygraphDefaultAnnotation", rule);
+ }
+
+ Dygraph.addedAnnotationCSS = true;
+}
+
+/**
+ * Create a new canvas element. This is more complex than a simple
+ * document.createElement("canvas") because of IE and excanvas.
+ */
+Dygraph.createCanvas = function() {
+ var canvas = document.createElement("canvas");
+
+ isIE = (/MSIE/.test(navigator.userAgent) && !window.opera);
+ if (isIE) {
+ canvas = G_vmlCanvasManager.initElement(canvas);
+ }
+
+ return canvas;
+};
+
/**
* A wrapper around Dygraph that implements the gviz API.
this.date_graph = new Dygraph(this.container, data, options);
}
+/**
+ * Google charts compatible setSelection
+ * Only row selection is supported, all points in the row will be highlighted
+ * @param {Array} array of the selected cells
+ * @public
+ */
+Dygraph.GVizChart.prototype.setSelection = function(selection_array) {
+ var row = false;
+ if (selection_array.length) {
+ row = selection_array[0].row;
+ }
+ this.date_graph.setSelection(row);
+}
+
+/**
+ * Google charts compatible getSelection implementation
+ * @return {Array} array of the selected cells
+ * @public
+ */
+Dygraph.GVizChart.prototype.getSelection = function() {
+ var selection = [];
+
+ var row = this.date_graph.getSelection();
+
+ if (row < 0) return selection;
+
+ col = 1;
+ for (var i in this.date_graph.layout_.datasets) {
+ selection.push({row: row, column: col});
+ col++;
+ }
+
+ return selection;
+}
+
// Older pages may still use this name.
DateGraph = Dygraph;