Extract the granularity-picking code of the date ticker into a new function.

diff --git a/dygraph-tickers.js b/dygraph-tickers.js
index a17519e..ae0e40f 100644 (file)
--- a/dygraph-tickers.js
+++ b/dygraph-tickers.js
@@ -193,15 +193,7 @@ Dygraph.numericTicks = function(a, b, pixels, opts, dygraph, vals) {
 
 
 Dygraph.dateTicker = function(a, b, pixels, opts, dygraph, vals) {
-  var pixels_per_tick = opts('pixelsPerLabel');
-  var chosen = -1;
-  for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) {
-    var num_ticks = Dygraph.numDateTicks(a, b, i);
-    if (pixels / num_ticks >= pixels_per_tick) {
-      chosen = i;
-      break;
-    }
-  }
+  var chosen = Dygraph.pickTickGranularity(a, b, pixels, opts);
 
   if (chosen >= 0) {
     return Dygraph.getDateAxis(a, b, chosen, opts, dygraph);
@@ -271,6 +263,17 @@ Dygraph.PREFERRED_LOG_TICK_VALUES = function() {
   return vals;
 }();
 
+Dygraph.pickTickGranularity = function(a, b, pixels, opts) {
+  var pixels_per_tick = opts('pixelsPerLabel');
+  for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) {
+    var num_ticks = Dygraph.numDateTicks(a, b, i);
+    if (pixels / num_ticks >= pixels_per_tick) {
+      return i;
+    }
+  }
+  return -1;
+};
+
 Dygraph.numDateTicks = function(start_time, end_time, granularity) {
   if (granularity < Dygraph.MONTHLY) {
     // Generate one tick mark for every fixed interval of time.