Add touch gestures to views menu controls.

ui/views/controls/menu/menu_controller.cc

 // Copyright (c) 2012 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 "ui/views/controls/menu/menu_controller.h"
 
 #include "base/i18n/case_conversion.h"
 #include "base/i18n/rtl.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
@@ skipping 525 matching lines @@
 #endif
 
 ui::GestureStatus MenuController::OnGestureEvent(SubmenuView* source,
                                                  const GestureEvent& event) {
   if (event.type() == ui::ET_GESTURE_TAP_DOWN) {
     SetSelectionOnPointerDown(source, event);
     return ui::GESTURE_STATUS_CONSUMED;
   } else if (event.type() == ui::ET_GESTURE_LONG_PRESS && possible_drag_) {
     StartDrag(source, event.location());
     return ui::GESTURE_STATUS_CONSUMED;
+  } else if (event.type() == ui::ET_GESTURE_TAP) {

[sadrul, 2012/06/11 16:00:37]

I think if something (e.g. a button) causes the menu to show up on TAP_DOWN,
then this menu may need to ignore the first TAP gesture (like it has logic for
ignoring first mouse-release). But since that is not the case currently, this
will work OK. This is just to point out that we may need to revisit this part of
the code later.

+    if (pending_state_.item) {
+      if (pending_state_.item->HasSubmenu())
+        OpenSubmenuChangeSelectionIfCan();
+      else if (pending_state_.item->enabled())
+        Accept(pending_state_.item, 0);
+      return ui::GESTURE_STATUS_CONSUMED;
+    }
   }
   MenuPart part = GetMenuPart(source, event.location());
   if (!part.submenu)
     return ui::GESTURE_STATUS_UNKNOWN;
   return part.submenu->OnGestureEvent(event);
 }
 
 bool MenuController::GetDropFormats(
       SubmenuView* source,
       int* formats,
@@ skipping 1531 matching lines @@
              (!pending_state_.item->HasSubmenu() ||
               !pending_state_.item->GetSubmenu()->IsShowing())) {
     // On exit if the user hasn't selected an item with a submenu, move the
     // selection back to the parent menu item.
     SetSelection(pending_state_.item->GetParentMenuItem(),
                  SELECTION_OPEN_SUBMENU);
   }
 }
 
 }  // namespace views