fix color-visibility test

[dygraphs.git] / dygraph.js

diff --git a/dygraph.js b/dygraph.js
index a73a8e4..8fbe9fa 100644 (file)
--- a/dygraph.js
+++ b/dygraph.js
@@ -318,7 +318,7 @@ Dygraph.prototype.xAxisRange = function() {
  * Returns a two-element array: [bottom, top].
  */
 Dygraph.prototype.yAxisRange = function(idx) {
-  if (typeof(idx) == "undefined") idx == 0;
+  if (typeof(idx) == "undefined") idx = 0;
   if (idx < 0 || idx >= this.axes_.length) return null;
   return [ this.axes_[idx].computedValueRange[0],
            this.axes_[idx].computedValueRange[1] ];
@@ -696,35 +696,35 @@ Dygraph.prototype.positionLabelsDiv_ = function() {
 
 /**
  * Create the text box to adjust the averaging period
- * @return {Object} The newly-created text box
  * @private
  */
 Dygraph.prototype.createRollInterface_ = function() {
-  // Destroy any existing roller.
-  if (this.roller_) this.graphDiv.removeChild(this.roller_);
+  // Create a roller if one doesn't exist already.
+  if (!this.roller_) {
+    this.roller_ = document.createElement("input");
+    this.roller_.type = "text";
+    this.roller_.style.display = "none";
+    this.graphDiv.appendChild(this.roller_);
+  }
+
+  var display = this.attr_('showRoller') ? 'block' : 'none';
 
-  var display = this.attr_('showRoller') ? "block" : "none";
   var textAttr = { "position": "absolute",
                    "zIndex": 10,
                    "top": (this.plotter_.area.h - 25) + "px",
                    "left": (this.plotter_.area.x + 1) + "px",
                    "display": display
                   };
-  var roller = document.createElement("input");
-  roller.type = "text";
-  roller.size = "2";
-  roller.value = this.rollPeriod_;
+  this.roller_.size = "2";
+  this.roller_.value = this.rollPeriod_;
   for (var name in textAttr) {
     if (textAttr.hasOwnProperty(name)) {
-      roller.style[name] = textAttr[name];
+      this.roller_.style[name] = textAttr[name];
     }
   }
 
-  var pa = this.graphDiv;
-  pa.appendChild(roller);
   var dygraph = this;
-  roller.onchange = function() { dygraph.adjustRoll(roller.value); };
-  return roller;
+  this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); };
 };
 
 // These functions are taken from MochiKit.Signal
@@ -897,8 +897,8 @@ Dygraph.prototype.createDragInterface_ = function() {
       draggingDate = null;
       dateRange = null;
       for (var i = 0; i < self.axes_.length; i++) {
-        delete this.axes_[i].draggingValue;
-        delete this.axes_[i].dragValueRange;
+        delete self.axes_[i].draggingValue;
+        delete self.axes_[i].dragValueRange;
       }
     }
   });
@@ -1799,7 +1799,7 @@ Dygraph.prototype.predraw_ = function() {
 
   // The roller sits in the bottom left corner of the chart. We don't know where
   // this will be until the options are available, so it's positioned here.
-  this.roller_ = this.createRollInterface_();
+  this.createRollInterface_();
 
   // Same thing applies for the labelsDiv. It's right edge should be flush with
   // the right edge of the charting area (which may not be the same as the right
@@ -1888,11 +1888,6 @@ Dygraph.prototype.drawGraph_ = function() {
     }
 
     var seriesExtremes = this.extremeValues_(series);
-    extremes[seriesName] = seriesExtremes;
-    var thisMinY = seriesExtremes[0];
-    var thisMaxY = seriesExtremes[1];
-    if (minY === null || (thisMinY != null && thisMinY < minY)) minY = thisMinY;
-    if (maxY === null || (thisMaxY != null && thisMaxY > maxY)) maxY = thisMaxY;
 
     if (bars) {
       for (var j=0; j<series.length; j++) {
@@ -1906,18 +1901,24 @@ Dygraph.prototype.drawGraph_ = function() {
         // If one data set has a NaN, let all subsequent stacked
         // sets inherit the NaN -- only start at 0 for the first set.
         var x = series[j][0];
-        if (cumulative_y[x] === undefined)
+        if (cumulative_y[x] === undefined) {
           cumulative_y[x] = 0;
+        }
 
         actual_y = series[j][1];
         cumulative_y[x] += actual_y;
 
         series[j] = [x, cumulative_y[x]]
 
-        if (!maxY || cumulative_y[x] > maxY)
-          maxY = cumulative_y[x];
+        if (cumulative_y[x] > seriesExtremes[1]) {
+          seriesExtremes[1] = cumulative_y[x];
+        }
+        if (cumulative_y[x] < seriesExtremes[0]) {
+          seriesExtremes[0] = cumulative_y[x];
+        }
       }
     }
+    extremes[seriesName] = seriesExtremes;
 
     datasets[i] = series;
   }
@@ -1966,7 +1967,7 @@ Dygraph.prototype.computeYAxes_ = function() {
 
   // Get a list of series names.
   var labels = this.attr_("labels");
-  var series = [];
+  var series = {};
   for (var i = 1; i < labels.length; i++) series[labels[i]] = (i - 1);
 
   // all options which could be applied per-axis:
@@ -2022,6 +2023,17 @@ Dygraph.prototype.computeYAxes_ = function() {
       this.seriesToAxisMap_[seriesName] = idx;
     }
   }
+
+  // Now we remove series from seriesToAxisMap_ which are not visible. We do
+  // this last so that hiding the first series doesn't destroy the axis
+  // properties of the primary axis.
+  var seriesToAxisFiltered = {};
+  var vis = this.visibility();
+  for (var i = 1; i < labels.length; i++) {
+    var s = labels[i];
+    if (vis[i - 1]) seriesToAxisFiltered[s] = this.seriesToAxisMap_[s];
+  }
+  this.seriesToAxisMap_ = seriesToAxisFiltered;
 };
 
 /**
@@ -2065,7 +2077,7 @@ Dygraph.prototype.computeYAxisRanges_ = function(extremes) {
       // This is a user-set value range for this axis.
       axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]];
     } else {
-      // Calcuate the extremes of extremes.
+      // Calculate the extremes of extremes.
       var series = seriesForAxis[i];
       var minY = Infinity;  // extremes[series[0]][0];
       var maxY = -Infinity;  // extremes[series[0]][1];