From 82a15e413d474886c9dd757a5993f870da862833 Mon Sep 17 00:00:00 2001
From: Petr Klus <petr@klus.co.uk>
Date: Tue, 21 Oct 2014 23:56:46 +0200
Subject: [PATCH] added captureVerticalWheel option

---
 js/jquery.fn.gantt.js | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/js/jquery.fn.gantt.js b/js/jquery.fn.gantt.js
index 708c9dc..90cab4d 100644
--- a/js/jquery.fn.gantt.js
+++ b/js/jquery.fn.gantt.js
@@ -44,7 +44,8 @@
             onItemClick: function (data) { return; },
             onAddClick: function (data) { return; },
             onRender: function() { return; },
-            scrollToToday: true
+            scrollToToday: true,
+            captureVerticalWheel: true
         };
 
         /**
@@ -1292,6 +1293,12 @@
 
             // Move chart via mousewheel
             wheelScroll: function (element, e) {
+                
+                if (!settings.captureVerticalWheel && Math.abs(e.originalEvent.deltaY) > Math.abs(e.originalEvent.deltaX)) {
+                    // short-circuit vertical scroll - we do not want to intercept that one!
+                    return
+                }                
+                
                 e.preventDefault(); // e is a jQuery Event
 
                 // attempts to normalize scroll wheel velocity