--- qnsview.mm	2014-04-30 12:57:10.000000000 -0700
+++ qnsview_new.mm	2014-04-30 12:56:24.000000000 -0700
@@ -479,7 +479,17 @@
 {
     if (m_window->flags() & Qt::WindowTransparentForInput)
         return NO;
-    QWindowSystemInterface::handleWindowActivated([self topLevelWindow]);
+    
+    // Don't blindly activate the top level window. Activate it if and only if
+    // the top level window (or a child widget of it) is meant to accept the
+    // keyboard focus. Context menu for instance is a prime example that can
+    // be the first responder for events but never want to be the active window.
+    
+    QWindow *topWindow = [self topLevelWindow]; // guaranteed to be non-null
+    QCocoaWindow *cocoaWindow = static_cast<QCocoaWindow *>(topWindow->handle());
+    if (cocoaWindow && cocoaWindow->m_nsWindow && [cocoaWindow->m_nsWindow canBecomeKeyWindow])
+        QWindowSystemInterface::handleWindowActivated(topWindow);
+    
     return YES;
 }