[Kstars-devel] Patch for RMB problems on OSX

[Sean Houghton]

I've attached a patch that fixes a problem on OSX caused by the right-click
gesture on macbooks. The gesture is two fingers on the trackpad and a
click. The problem is that the two fingers triggered a mousewheel event
with zero delta. The code was interpreting this as a zoom out. This made it
impossible to slew the scope to a particular location w/out a mouse. The
fix is to only consider negative deltas as zoom a out.


-- 
-Sean
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From ef0a904058c00a43e16b74fb90a4469fbcd3116c Mon Sep 17 00:00:00 2001
From: Sean Houghton <sean.houghton at gmail.com>
Date: Sat, 5 Sep 2015 00:21:14 -0700
Subject: [PATCH] Fix zoom out on two-finger gesture on OS X. Ignore zero-delta
 mouse wheel events.

---
 kstars/skymapevents.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kstars/skymapevents.cpp b/kstars/skymapevents.cpp
index 00a24a4..7b7c2e1 100644
--- a/kstars/skymapevents.cpp
+++ b/kstars/skymapevents.cpp
@@ -500,7 +500,7 @@ void SkyMap::mouseMoveEvent( QMouseEvent *e ) {
 void SkyMap::wheelEvent( QWheelEvent *e ) {
     if ( e->delta() > 0 )
         zoomInOrMagStep ( e->modifiers() );
-    else
+    else if ( e->delta() < 0 )
         zoomOutOrMagStep( e->modifiers() );
 }
 
-- 
2.2.1