// Create the PlotKit grapher
// TODO(danvk): why does the Layout need its own set of options?
- this.layoutOptions_ = { 'errorBars': (this.attr_("errorBars") ||
- this.attr_("customBars")),
- 'xOriginIsZero': false };
+ 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_);
enclosing.appendChild(this.graphDiv);
// Create the canvas for interactive parts of the chart.
- this.canvas_ = document.createElement("canvas");
+ // this.canvas_ = document.createElement("canvas");
+ 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
this.graphDiv.appendChild(this.canvas_);
// ... and for static parts of the chart.
* @private
*/
Dygraph.prototype.createPlotKitCanvas_ = function(canvas) {
- var h = document.createElement("canvas");
+ // var h = document.createElement("canvas");
+ var h = Dygraph.createCanvas();
h.style.position = "absolute";
h.style.top = canvas.style.top;
h.style.left = canvas.style.left;
h.width = this.width_;
h.height = this.height_;
+ h.style.width = this.width_ + "px"; // for IE
+ h.style.height = this.height_ + "px"; // for IE
this.graphDiv.appendChild(h);
return h;
};
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_));
+ // TODO(danvk): pass along more info about the points.
+ self.attr_('clickCallback')(event, self.lastx_, self.selPoints_);
}
if (regionWidth >= 10) {
// Double-clicking zooms back out
Dygraph.addEvent(this.hidden_, 'dblclick', function(event) {
+ if (self.dateWindow_ == null) return;
self.dateWindow_ = null;
self.drawGraph_(self.rawData_);
var minDate = self.rawData_[0][0];
lastx = points[points.length-1].xval;
// Extract the points we've selected
- var selPoints = [];
+ this.selPoints_ = [];
for (var i = 0; i < points.length; i++) {
if (points[i].xval == lastx) {
- selPoints.push(points[i]);
+ this.selPoints_.push(points[i]);
}
}
+ if (this.attr_("highlightCallback")) {
+ this.attr_("highlightCallback")(event, lastx, this.selPoints_);
+ }
+
// Clear the previously drawn vertical, if there is one
var circleSize = this.attr_('highlightCircleSize');
var ctx = this.canvas_.getContext("2d");
var isOK = function(x) { return x && !isNaN(x); };
- if (selPoints.length > 0) {
- var canvasx = selPoints[0].canvasx;
+ 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 clen = this.colors_.length;
- for (var i = 0; i < selPoints.length; i++) {
- if (!isOK(selPoints[i].canvasy)) continue;
+ for (var i = 0; i < this.selPoints_.length; i++) {
+ if (!isOK(this.selPoints_[i].canvasy)) continue;
if (this.attr_("labelsSeparateLines")) {
replace += "<br/>";
}
- var point = selPoints[i];
+ var point = this.selPoints_[i];
var c = new RGBColor(this.colors_[i%clen]);
replace += " <b><font color='" + c.toHex() + "'>"
+ point.name + "</font></b>:"
// Draw colored circles over the center of each selected point
ctx.save()
- for (var i = 0; i < selPoints.length; i++) {
- if (!isOK(selPoints[i%clen].canvasy)) continue;
+ for (var i = 0; i < this.selPoints_.length; i++) {
+ if (!isOK(this.selPoints_[i%clen].canvasy)) continue;
ctx.beginPath();
ctx.fillStyle = this.colors_[i%clen];
- ctx.arc(canvasx, selPoints[i%clen].canvasy, circleSize, 0, 360, false);
+ ctx.arc(canvasx, this.selPoints_[i%clen].canvasy, circleSize,
+ 0, 2 * Math.PI, false);
ctx.fill();
}
ctx.restore();
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 && !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] && !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,
this.drawGraph_(this.rawData_);
};
+/**
+ * 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.