From cf4f5e9573fb7b8d7785bd584b3c6bd8351ad6c5 Mon Sep 17 00:00:00 2001
From: Tom Herold <tom.herold@scalableminds.com>
Date: Thu, 13 Mar 2014 18:10:28 +0800
Subject: [PATCH] added 'multiselected' option

---
 c3.js                              |  9 ++++++++-
 c3.min.js                          |  4 ++--
 htdocs/samples/selection_line.html | 26 ++++++++++++++++++++++++++
 3 files changed, 36 insertions(+), 3 deletions(-)
 create mode 100644 htdocs/samples/selection_line.html

diff --git a/c3.js b/c3.js
index 0c9fbab..6182ab0 100644
--- a/c3.js
+++ b/c3.js
@@ -65,7 +65,9 @@
             __data_colors = getConfig(['data', 'colors'], {}),
             __data_selection_enabled = getConfig(['data', 'selection', 'enabled'], false),
             __data_selection_grouped = getConfig(['data', 'selection', 'grouped'], false),
-            __data_selection_isselectable = getConfig(['data', 'selection', 'isselectable'], function () { return true; });
+            __data_selection_isselectable = getConfig(['data', 'selection', 'isselectable'], function () { return true; }),
+            __data_selection_multiselected = getConfig(['data', 'selection', 'multiselected'], true);
+
 
         // subchart
         var __subchart_show = getConfig(['subchart', 'show'], false),
@@ -2177,6 +2179,11 @@
             }
             if (__data_selection_grouped || isWithin) {
                 if (__data_selection_enabled && __data_selection_isselectable(d)) {
+                    if (!__data_selection_multiselected) {
+                        main.selectAll(target.nodeName).each(function (d, i) {
+                            toggle(false, this, d, i);
+                        });
+                    }
                     _this.classed(SELECTED, !isSelected);
                     toggle(!isSelected, _this, d, i);
                 }
diff --git a/c3.min.js b/c3.min.js
index 93a3d75..21dc12e 100644
--- a/c3.min.js
+++ b/c3.min.js
@@ -1,2 +1,2 @@
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diff --git a/htdocs/samples/selection_line.html b/htdocs/samples/selection_line.html
new file mode 100644
index 0000000..0229d0f
--- /dev/null
+++ b/htdocs/samples/selection_line.html
@@ -0,0 +1,26 @@
+<html>
+  <head>
+    <link rel="stylesheet" type="text/css" href="/css/c3.css">
+  </head>
+  <body>
+    <div id="chart"></div>
+
+    <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
+    <script src="/js/c3.js"></script>
+    <script>
+      var chart = c3.generate({
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+        data: {
+          columns: [
+            ['sample', 30, 200, 100, 400, 150, 250]
+          ],
+          selection: {
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+            grouped: true,
+            multiselected: false
+          }
+        }
+      });
+    </script>
+  </body>
+</html>