Refactor cros library code into central location and have the UI elements obs...

chrome/browser/chromeos/clock_menu_button.h

+// Copyright (c) 2009 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_CLOCK_MENU_BUTTON_H_
+#define CHROME_BROWSER_CHROMEOS_CLOCK_MENU_BUTTON_H_
+
+#include "base/timer.h"
+#include "views/controls/button/menu_button.h"
+#include "views/controls/menu/menu_2.h"
+#include "views/controls/menu/view_menu_delegate.h"
+
+// The clock menu button in the status area.
+// This button shows the current time.
+class ClockMenuButton : public views::MenuButton,
+                        public views::ViewMenuDelegate,
+                        public views::Menu2Model {
+ public:
+  ClockMenuButton();
+  virtual ~ClockMenuButton() {}
+
+  // views::Menu2Model implementation.
+  virtual bool HasIcons() const  { return false; }
+  virtual int GetItemCount() const;
+  virtual views::Menu2Model::ItemType GetTypeAt(int index) const;
+  virtual int GetCommandIdAt(int index) const { return index; }
+  virtual string16 GetLabelAt(int index) const;
+  virtual bool IsLabelDynamicAt(int index) const { return true; }
+  virtual bool GetAcceleratorAt(int index,
+      views::Accelerator* accelerator) const { return false; }
+  virtual bool IsItemCheckedAt(int index) const { return false; }
+  virtual int GetGroupIdAt(int index) const { return 0; }
+  virtual bool GetIconAt(int index, SkBitmap* icon) const { return false; }
+  virtual bool IsEnabledAt(int index) const { return false; }
+  virtual Menu2Model* GetSubmenuModelAt(int index) const { return NULL; }
+  virtual void HighlightChangedTo(int index) {}
+  virtual void ActivatedAt(int index) {}
+  virtual void MenuWillShow() {}
+
+ private:
+  // views::ViewMenuDelegate implementation.
+  virtual void RunMenu(views::View* source, const gfx::Point& pt,
+                       gfx::NativeView hwnd);
+
+  // Schedules the timer to fire at the next minute interval.
+  void SetNextTimer();
+
+  // Updates the time on the menu button and sets the next timer.
+  void UpdateText();
+
+  base::OneShotTimer<ClockMenuButton> timer_;
+
+  // The clock menu.
+  views::Menu2 clock_menu_;
+
+  DISALLOW_COPY_AND_ASSIGN(ClockMenuButton);
+};
+
+#endif  // CHROME_BROWSER_CHROMEOS_CLOCK_MENU_BUTTON_H_