From: Robert Konigsberg <konigsberg@google.com>
Date: Fri, 8 Oct 2010 14:05:46 +0000 (-0400)
Subject: updated comment.
X-Git-Tag: v1.0.0~613^2~11
X-Git-Url: https://adrianiainlam.tk/git/?a=commitdiff_plain;h=ef0b205bc164b9cb9023e4c91e95bf4cdd4ab669;p=dygraphs.git

updated comment.
---

diff --git a/dygraph.js b/dygraph.js
index f70bfa9..001d224 100644
--- a/dygraph.js
+++ b/dygraph.js
@@ -810,9 +810,10 @@ Dygraph.prototype.createDragInterface_ = function() {
       var maxDate = minDate + dateRange;
       self.dateWindow_ = [minDate, maxDate];
 
-      // if a y-axis as been defined then the y-axis scale is maintained.
-      // otherwise don't set a value window, thereby forcing automatic y-axis
-      // scaling.
+
+      // y-axis scaling is automatic unless a valueRange is defiend or
+      // if the user zooms in on the y-axis. If neither is true, valueWindow
+      // will be null.
       if (self.valueWindow_) {
         var maxValue = draggingValue + (dragEndY / self.height_) * valueRange;
         var minValue = maxValue - valueRange;