Implement the final UI for the CAPS LOCK indicator (part 3 of 3)

chrome/browser/chromeos/status/caps_lock_menu_button.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_STATUS_CAPS_LOCK_MENU_BUTTON_H_
 #define CHROME_BROWSER_CHROMEOS_STATUS_CAPS_LOCK_MENU_BUTTON_H_
 #pragma once
 
 #include <string>
 
+#include "base/timer.h"
 #include "chrome/browser/chromeos/status/status_area_button.h"
 #include "chrome/browser/chromeos/system_key_event_listener.h"
 #include "chrome/browser/prefs/pref_member.h"
 #include "content/public/browser/notification_observer.h"
 #include "views/controls/menu/menu_delegate.h"
 #include "views/controls/menu/view_menu_delegate.h"
 
+class Bubble;
+
 namespace views {
 class MenuRunner;
 }
 
 namespace chromeos {
 
 class StatusAreaHost;
 
 // A class for the button in the status area which alerts the user when caps
 // lock is active.
@@ skipping 20 matching lines @@
   virtual void OnCapsLockChange(bool enabled);
 
   // content::NotificationObserver implementation
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details);
 
   // Updates the accessible name.
   void UpdateAccessibleName();
 
-  // Gets the text for the drop-down menu.
+  // Gets the text for the drop-down menu and bubble.
   string16 GetText() const;
 
-  // Updates the UI from the current state.
+  // Updates the button from the current state.
   void UpdateUIFromCurrentCapsLock(bool enabled);
 
  private:
   class StatusView;
 
+  // Returns true if the Search key is assigned to Caps Lock.
+  bool HasCapsLock() const;
+
+  bool IsMenuShown() const;
+  void HideMenu();
+
+  bool IsBubbleShown() const;
+  void MaybeShowBubble();
+  void CreateAndShowBubble();
+  void HideBubble();
+
   PrefService* prefs_;
   IntegerPrefMember remap_search_key_to_;
 
   // The currently showing status view. NULL if menu is not being displayed.
   StatusView* status_;
-
   // If non-null the menu is showing.
   scoped_ptr<views::MenuRunner> menu_runner_;
 
+  // The currently showing bubble. NULL if bubble is not being displayed.
+  Bubble* bubble_;
+  // If true, |bubble_| is shown when both shift keys are pressed.
+  bool should_show_bubble_;
+  // # of times |bubble_| is shown.
+  size_t bubble_count_;
+  // TODO(yusukes): Save should_show_bubble_ and bubble_count_ in Preferences.
+
+  // The timer for hiding the bubble.
+  base::OneShotTimer<CapsLockMenuButton> bubble_timer_;
+
   DISALLOW_COPY_AND_ASSIGN(CapsLockMenuButton);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_STATUS_CAPS_LOCK_MENU_BUTTON_H_