commit 291c4626867885c74aa3a544eb9f74cd974895a0
Author: Cody Russell <cody@jhu.edu>
Date:   Wed Jan 14 14:56:34 2015 -0600

    When determining if the event is destined for an NSView outside our
    view hierarchy, we can't just check if it's not a gtkview, we need to
    also ensure that none of its superviews are gtkviews.

diff --git a/gdk/quartz/gdkevents-quartz.c b/gdk/quartz/gdkevents-quartz.c
index 31c5d33..183537f 100644
--- a/gdk/quartz/gdkevents-quartz.c
+++ b/gdk/quartz/gdkevents-quartz.c
@@ -1823,7 +1823,18 @@ gdk_event_translate (GdkEvent *event,
         GdkQuartzWindow *nswindow = ((GdkWindowImplQuartz *)private->impl)->toplevel;
         GdkQuartzView *nsview = ((GdkWindowImplQuartz *)private->impl)->view;

-        if (![[nswindow firstResponder] respondsToSelector:@selector(isGtkView)])
+        NSView *tmp_view = [nswindow firstResponder];
+        gboolean gtk_child = FALSE;
+
+        while (tmp_view != NULL)
+          {
+            if (tmp_view && [tmp_view respondsToSelector:@selector(isGtkView)])
+              gtk_child = TRUE;
+
+            tmp_view = [tmp_view superview];
+          }
+
+        if (!gtk_child && ![[nswindow firstResponder] respondsToSelector:@selector(isGtkView)])
           {
             return_val = FALSE;
             break;