minor tweaks to jeremy's change

[dygraphs.git] / dygraph.js

diff --git a/dygraph.js b/dygraph.js
index f5e19ab..656d7a8 100644 (file)
--- a/dygraph.js
+++ b/dygraph.js
@@ -221,7 +221,7 @@ Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) {
 
 /**
  * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit
- * and context <canvas> inside of it. See the constructor for details
+ * and context <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
@@ -254,7 +254,7 @@ Dygraph.prototype.__init__ = function(div, file, attrs) {
   this.wilsonInterval_ = attrs.wilsonInterval || true;
   this.is_initial_draw_ = true;
   this.annotations_ = [];
-  
+
   // Number of digits to use when labeling the x (if numeric) and y axis
   // ticks.
   this.numXDigits_ = 2;
@@ -331,6 +331,12 @@ Dygraph.prototype.__init__ = function(div, file, attrs) {
   this.start_();
 };
 
+Dygraph.prototype.toString = function() {
+  var maindiv = this.maindiv_;
+  var id = (maindiv && maindiv.id) ? maindiv.id : maindiv
+  return "[Dygraph " + id + "]";
+}
+
 Dygraph.prototype.attr_ = function(name, seriesName) {
   if (seriesName &&
       typeof(this.user_attrs_[seriesName]) != 'undefined' &&
@@ -1470,7 +1476,7 @@ Dygraph.prototype.mouseMove_ = function(event) {
   var points = this.layout_.points;
 
   // This prevents JS errors when mousing over the canvas before data loads.
-  if (points === 'undefined') return;
+  if (points === undefined) return;
 
   var lastx = -1;
   var lasty = -1;
@@ -1802,8 +1808,10 @@ Dygraph.prototype.addXTicks_ = function() {
   var ret = formatter(range[0], range[1], this);
   var xTicks = [];
 
+  // Note: numericTicks() returns a {ticks: [...], numDigits: yy} dictionary,
+  // whereas dateTicker and user-defined tickers typically just return a ticks
+  // array.
   if (ret.ticks !== undefined) {
-    // numericTicks() returns multiple values.
     xTicks = ret.ticks;
     this.numXDigits_ = ret.numDigits;
   } else {