From 0f300a256ce207689a652ec0df7a0bf7c00d4ff6 Mon Sep 17 00:00:00 2001
From: bjarni <bjarni@openttd.org>
Date: Tue, 4 Jul 2006 19:02:49 +0000
Subject: [PATCH] (svn r5460) -Feature: [OSX] macs with touchpads that support
 two finger scrolling can now use this "scrollwheel" to scroll up/down (ln-)

---
 video/cocoa_v.m | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/video/cocoa_v.m b/video/cocoa_v.m
index b4b026c010..4de6af703c 100644
--- a/video/cocoa_v.m
+++ b/video/cocoa_v.m
@@ -649,11 +649,11 @@ static bool QZ_PollEvent(void)
 			break;
 
 		case NSScrollWheel:
-			if ([ event deltaX ] > 0.0 || [ event deltaY ] > 0.0) { /* Scroll up */
+			if ([ event deltaY ] > 0.0) { /* Scroll up */
 				_cursor.wheel--;
-			} else { /* Scroll down */
+			} else if ([ event deltaY ] < 0.0) { /* Scroll down */
 				_cursor.wheel++;
-			}
+			} /* else: deltaY was 0.0 and we don't want to do anything */
 			break;
 
 		default: