From 27dfde0ad0644831a2ff9bf13e130ba85eb25994 Mon Sep 17 00:00:00 2001
From: Luis Fernando Molina <Luis-Fernando-Molina@users.noreply.github.com>
Date: Tue, 10 Mar 2020 17:58:14 +0100
Subject: [PATCH] mac users bug fixed

---
 Canvas.js                 | 2 ++
 ChartingSpace/Viewport.js | 6 ++----
 Globals.js                | 3 +++
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/Canvas.js b/Canvas.js
index 94450dd9b..0de5abe37 100644
--- a/Canvas.js
+++ b/Canvas.js
@@ -834,6 +834,8 @@ function newCanvas () {
 
   function onMouseWheel (event) {
     try {
+      if (IS_MAC) { event.delta = event.delta / MAC_AMOUNT_FACTOR }
+
       thisObject.mouse.event = event
       thisObject.mouse.position.x = event.pageX
       thisObject.mouse.position.y = event.pageY - CURRENT_TOP_MARGIN
diff --git a/ChartingSpace/Viewport.js b/ChartingSpace/Viewport.js
index 7ec366e40..4a432ac99 100644
--- a/ChartingSpace/Viewport.js
+++ b/ChartingSpace/Viewport.js
@@ -197,16 +197,14 @@ function newViewport () {
   }
 
   function onMouseWheel (event) {
-    const MAC_AMOUNT_FACTOR = 5
-
     if (thisObject.visible === false) { return }
     if ((event.ctrlKey === true || event.metaKey === true)) { return }
     let morePower = 1
     let amount = event.delta
     if (event.buttons === 4) { morePower = 2 } // Mouse wheel pressed.
        /* We adjust the sensitivity for Mac Users */
-    let isMac = navigator.platform.toUpperCase().indexOf('MAC') >= 0
-    if (isMac) { amount = amount / MAC_AMOUNT_FACTOR }
+
+    if (IS_MAC) { amount = amount / MAC_AMOUNT_FACTOR }
 
     if (thisObject.zoomTargetLevel > 10) {
       amount = amount * 2
diff --git a/Globals.js b/Globals.js
index dfddf6b50..b6d1bb722 100644
--- a/Globals.js
+++ b/Globals.js
@@ -41,6 +41,9 @@ UI_FONT = {
     SECONDARY: "Source Code Pro"
 };
 
+const MAC_AMOUNT_FACTOR = 5
+const IS_MAC = navigator.platform.toUpperCase().indexOf('MAC') >= 0
+
 const DOUBLE_CLICK_ZOOM_OUT_LEVEL = 0
 const DOUBLE_CLICK_ZOOM_IN_LEVEL = 7