Change no-series-defined behavior so that it computes the

extreme range.  This still allows zooming in and respecting
user-defined ranges even when no series are present.

diff --git a/dygraph.js b/dygraph.js
index fe677f2..19eccb2 100644 (file)
--- a/dygraph.js
+++ b/dygraph.js
@@ -2770,25 +2770,14 @@ Dygraph.prototype.computeYAxisRanges_ = function(extremes) {
     seriesForAxis[idx].push(series);
   }
 
-  // If no series are defined or visible then fill in some reasonable defaults.
-  if (seriesForAxis.length == 0) {
-    var axis = this.axes_[0];
-    axis.computedValueRange = [0, 1];
-    var ret =
-      Dygraph.numericTicks(axis.computedValueRange[0],
-                           axis.computedValueRange[1],
-                           this,
-                           axis);
-    axis.ticks = ret.ticks;
-    this.numYDigits_ = ret.numDigits;
-    return;
-  }
-
   // Compute extreme values, a span and tick marks for each axis.
   for (var i = 0; i < this.axes_.length; i++) {
     var axis = this.axes_[i];
  
-    {
+    if (!seriesForAxis[i]) {
+      // If no series are defined or visible then use a reasonable default
+      axis.extremeRange = [0, 1];
+    } else {
       // Calculate the extremes of extremes.
       var series = seriesForAxis[i];
       var minY = Infinity;  // extremes[series[0]][0];