Cocoa: Use new 10.7 mouse wheel API.

Silence "deprecated" warnings. Use the old API
on 10.6.

Change-Id: I0cfa3a083108618023b491589a85ddfc268f990b
Reviewed-by: Morten Johan Sørvig <morten.sorvig@nokia.com>

1 files changed, 14 insertions, 3 deletions

diff --git a/src/plugins/platforms/cocoa/qnsview.mm b/src/plugins/platforms/cocoa/qnsview.mm
index a0a5a2e5cf..82b4e54deb 100644
--- a/src/plugins/platforms/cocoa/qnsview.mm
+++ b/src/plugins/platforms/cocoa/qnsview.mm
@@ -337,9 +337,20 @@ static QTouchDevice *touchDevice = 0;
         // It looks like 1/4 degrees per pixel behaves most native.
         // (NB: Qt expects the unit for delta to be 8 per degree):
         const int pixelsToDegrees = 2; // 8 * 1/4
-        deltaX = [theEvent deviceDeltaX] * pixelsToDegrees;
-        deltaY = [theEvent deviceDeltaY] * pixelsToDegrees;
-        deltaZ = [theEvent deviceDeltaZ] * pixelsToDegrees;
+
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
+        if ([theEvent respondsToSelector:@selector(scrollingDeltaX)]) {
+            deltaX = [theEvent scrollingDeltaX] * pixelsToDegrees;
+            deltaY = [theEvent scrollingDeltaY] * pixelsToDegrees;
+            //  scrollingDeltaZ API is missing.
+        } else
+#endif
+        {
+            deltaX = [theEvent deviceDeltaX] * pixelsToDegrees;
+            deltaY = [theEvent deviceDeltaY] * pixelsToDegrees;
+            deltaZ = [theEvent deviceDeltaZ] * pixelsToDegrees;
+        }
+
     } else {
         // carbonEventKind == kEventMouseWheelMoved
         // Remove acceleration, and use either -120 or 120 as delta: