From a2da3777b8931b37c644831dc371ccbfae9fd758 Mon Sep 17 00:00:00 2001
From: Dan Vanderkam <dan@dygraphs.com>
Date: Wed, 21 Dec 2011 16:29:22 -0500
Subject: [PATCH] Fix issue 131: setVisibility() broken with multiple axes

This reworks the logic for visibility and axes. Invisible series are kept in
the seriesToAxis map, but are ignored when calculating the layout and extreme
values.

I am slightly wary because I did not understand the comment about visibility in
the deleted portion of computeYAxes_. It seemed to be describing the exact same
problem as this bug, but did not really address it.

Squashed commit of the following:

commit 5916f4782d26e0933764607dd7cc93ebde981b2a
Author: Dan Vanderkam <dan@dygraphs.com>
Date:   Wed Dec 21 16:26:56 2011 -0500

    I do not believe so

commit ae08301858225d9c9b2eb185cb45be8a3cf1387e
Author: Dan Vanderkam <dan@dygraphs.com>
Date:   Wed Dec 21 16:25:52 2011 -0500

    issue is fixed, but are there side-effects?

commit 4cfbfae182d800bd15c738e879c707b283117983
Merge: c26c4fd 107c99e
Author: Dan Vanderkam <dan@dygraphs.com>
Date:   Wed Dec 21 15:58:24 2011 -0500

    Merge branch 'master' into issue131

commit c26c4fd945d1b515d2ebe7839fb5fc7a9cfa2cec
Author: Dan Vanderkam <dan@dygraphs.com>
Date:   Wed Dec 21 15:51:03 2011 -0500

    failing auto_test
---
 auto_tests/tests/multiple_axes.js | 34 ++++++++++++++++++++++++++++++++++
 dygraph.js                        | 19 ++++++-------------
 2 files changed, 40 insertions(+), 13 deletions(-)

diff --git a/auto_tests/tests/multiple_axes.js b/auto_tests/tests/multiple_axes.js
index 12c9c42..eb74f60 100644
--- a/auto_tests/tests/multiple_axes.js
+++ b/auto_tests/tests/multiple_axes.js
@@ -133,3 +133,37 @@ MultipleAxesTestCase.prototype.testMultiAxisLayout = function() {
     // assertTrue((child.offsetTop + child.offsetHeight) <= 350);
   }
 };
+
+MultipleAxesTestCase.prototype.testTwoAxisVisibility = function() {
+  var data = [];
+  data.push([0,0,0]);
+  data.push([1,2,2000]);
+  data.push([2,4,1000]);
+
+  g = new Dygraph(
+    document.getElementById("graph"),
+    data,
+    {
+      labels: [ 'X', 'bar', 'zot' ],
+      'zot': {
+        axis: {
+          labelsKMB: true
+        }
+      }
+    }
+  );
+
+  assertTrue(document.getElementsByClassName("dygraph-axis-label-y").length > 0);
+  assertTrue(document.getElementsByClassName("dygraph-axis-label-y2").length > 0);
+
+  g.setVisibility(0, false);
+
+  assertTrue(document.getElementsByClassName("dygraph-axis-label-y").length > 0);
+  assertTrue(document.getElementsByClassName("dygraph-axis-label-y2").length > 0);
+
+  g.setVisibility(0, true);
+  g.setVisibility(1, false);
+
+  assertTrue(document.getElementsByClassName("dygraph-axis-label-y").length > 0);
+  assertTrue(document.getElementsByClassName("dygraph-axis-label-y2").length > 0);
+};
diff --git a/dygraph.js b/dygraph.js
index d9997e9..f9d5f5e 100644
--- a/dygraph.js
+++ b/dygraph.js
@@ -2147,17 +2147,6 @@ Dygraph.prototype.computeYAxes_ = function() {
     }
   }
 
-  // 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;
-
   if (valueWindows != undefined) {
     // Restore valueWindow settings.
     for (var index = 0; index < valueWindows.length; index++) {
@@ -2221,7 +2210,11 @@ Dygraph.prototype.computeYAxisRanges_ = function(extremes) {
       var minY = Infinity;  // extremes[series[0]][0];
       var maxY = -Infinity;  // extremes[series[0]][1];
       var extremeMinY, extremeMaxY;
+
       for (var j = 0; j < series.length; j++) {
+        // this skips invisible series
+        if (!extremes.hasOwnProperty(series[j])) continue;
+
         // Only use valid extremes to stop null data series' from corrupting the scale.
         extremeMinY = extremes[series[j]][0];
         if (extremeMinY != null) {
@@ -2234,9 +2227,9 @@ Dygraph.prototype.computeYAxisRanges_ = function(extremes) {
       }
       if (axis.includeZero && minY > 0) minY = 0;
 
-      // Ensure we have a valid scale, otherwise defualt to zero for safety.
+      // Ensure we have a valid scale, otherwise default to [0, 1] for safety.
       if (minY == Infinity) minY = 0;
-      if (maxY == -Infinity) maxY = 0;
+      if (maxY == -Infinity) maxY = 1;
 
       // Add some padding and round up to an integer to be human-friendly.
       var span = maxY - minY;
-- 
2.7.4