Support touch scroll gestures in menus.

views/controls/menu/menu_host_root_view.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "views/controls/menu/menu_host_root_view.h"
 
 #include "views/controls/menu/menu_controller.h"
 #include "views/controls/menu/submenu_view.h"
 
 namespace views {
@@ skipping 44 matching lines @@
       GetMenuController()->OnMouseWheel(submenu_, event);
 #else
   // Windows uses focus_util_win::RerouteMouseWheel to forward events to
   // the right menu.
   // RootView::OnMouseWheel forwards to the focused view. We don't have a
   // focused view, so we need to override this then forward to the menu.
   return submenu_->OnMouseWheel(event);
 #endif
 }
 
+ui::GestureStatus MenuHostRootView::OnGestureEvent(const GestureEvent& event) {
+#if defined(OS_LINUX)
+  // ChromeOS uses MenuController to forward events like other
+  // mouse events.
+  if (!GetMenuController())
+    return ui::GESTURE_STATUS_UNKNOWN;
+  return GetMenuController()->OnGestureEvent(submenu_, event);
+#else
+  // TODO(vollick): gestures in Windows.

[rjkroege, 2012/01/19 16:15:08]

you need to hook up with cpu about this I think

+  return RootView::OnGestureEvent(event);
+#endif
+}
+
 MenuController* MenuHostRootView::GetMenuController() {
   return submenu_ ? submenu_->GetMenuItem()->GetMenuController() : NULL;
 }
 
 }  // namespace views