From a905046ceb86fbdc75c919c5a17132febe9d43f5 Mon Sep 17 00:00:00 2001
From: "Dakota St. Laurent" <dstlaurent@gobonfire.com>
Date: Thu, 24 Dec 2015 12:36:29 -0500
Subject: [PATCH 1/2] added total row to tooltip

---
 src/config.js  |  3 +++
 src/tooltip.js | 15 ++++++++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/config.js b/src/config.js
index ae9aa9f..44cbe4a 100644
--- a/src/config.js
+++ b/src/config.js
@@ -208,6 +208,9 @@ c3_chart_internal_fn.getDefaultConfig = function () {
         tooltip_init_position: {top: '0px', left: '50px'},
         tooltip_onshow: function () {},
         tooltip_onhide: function () {},
+        tooltip_total_show: false,
+        tooltip_total_name: undefined,
+        tooltip_total_format_value: undefined,
         // title
         title_text: undefined,
         title_padding: {
diff --git a/src/tooltip.js b/src/tooltip.js
index ce76601..720c33b 100644
--- a/src/tooltip.js
+++ b/src/tooltip.js
@@ -29,7 +29,9 @@ c3_chart_internal_fn.getTooltipContent = function (d, defaultTitleFormat, defaul
         titleFormat = config.tooltip_format_title || defaultTitleFormat,
         nameFormat = config.tooltip_format_name || function (name) { return name; },
         valueFormat = config.tooltip_format_value || defaultValueFormat,
-        text, i, title, value, name, bgcolor,
+        totalName = config.tooltip_total_name || "Total",
+        totalValueFormat = config.tooltip_total_format_value || valueFormat,
+        text, i, title, value, name, bgcolor, totalValue,
         orderAsc = $$.isOrderAsc();
 
     if (config.data_groups.length === 0) {
@@ -70,6 +72,17 @@ c3_chart_internal_fn.getTooltipContent = function (d, defaultTitleFormat, defaul
             text += "</tr>";
         }
     }
+    // adding a "Total" row to the tooltip - if a formatter is not given then the total
+    // value will be formatted the same way as the other values
+    if (config.tooltip_total_show) {
+        totalValue = 0;
+        for (i=0; i < d.length; i++) {
+            totalValue += d[i].value;
+        }
+        totalValue = totalValueFormat(totalValue);
+        text += "<tr><td class='name'><strong>" + totalName + "</strong></td>";
+        text += "<td class='value'>" + totalValue + "</td></tr>";
+    }
     return text + "</table>";
 };
 c3_chart_internal_fn.tooltipPosition = function (dataToShow, tWidth, tHeight, element) {

From 14603daa221b975889381006edf31be3a1d6a87a Mon Sep 17 00:00:00 2001
From: "Dakota St. Laurent" <dstlaurent@gobonfire.com>
Date: Fri, 8 Jan 2016 12:39:06 -0500
Subject: [PATCH 2/2] src/tooltip total row cleanup

---
 src/tooltip.js | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/tooltip.js b/src/tooltip.js
index 720c33b..696394f 100644
--- a/src/tooltip.js
+++ b/src/tooltip.js
@@ -76,12 +76,15 @@ c3_chart_internal_fn.getTooltipContent = function (d, defaultTitleFormat, defaul
     // value will be formatted the same way as the other values
     if (config.tooltip_total_show) {
         totalValue = 0;
-        for (i=0; i < d.length; i++) {
+        for (i = 0; i < d.length; i++) {
+            if (! (d[i] && (d[i].value || d[i].value === 0))) { continue; }
             totalValue += d[i].value;
         }
         totalValue = totalValueFormat(totalValue);
-        text += "<tr><td class='name'><strong>" + totalName + "</strong></td>";
-        text += "<td class='value'>" + totalValue + "</td></tr>";
+        text += "<tr>";
+        text += "<td class='name'><strong>" + totalName + "</strong></td>";
+        text += "<td class='value'>" + totalValue + "</td>";
+        text += "</tr>";
     }
     return text + "</table>";
 };