clock_menu_button.h revision dc0f95d653279beabeb9817299e2902918ba123e 
1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CHROME_BROWSER_CHROMEOS_STATUS_CLOCK_MENU_BUTTON_H_
6#define CHROME_BROWSER_CHROMEOS_STATUS_CLOCK_MENU_BUTTON_H_
7#pragma once
8
9#include "base/scoped_ptr.h"
10#include "base/timer.h"
11#include "chrome/browser/chromeos/cros/power_library.h"
12#include "chrome/browser/chromeos/cros/system_library.h"
13#include "chrome/browser/chromeos/status/status_area_button.h"
14#include "unicode/calendar.h"
15#include "views/controls/button/menu_button.h"
16#include "views/controls/menu/menu_2.h"
17#include "views/controls/menu/view_menu_delegate.h"
18
19namespace chromeos {
20
21class StatusAreaHost;
22
23// The clock menu button in the status area.
24// This button shows the current time.
25class ClockMenuButton : public StatusAreaButton,
26                        public views::ViewMenuDelegate,
27                        public ui::MenuModel,
28                        public PowerLibrary::Observer,
29                        public SystemLibrary::Observer {
30 public:
31  explicit ClockMenuButton(StatusAreaHost* host);
32  virtual ~ClockMenuButton();
33
34  // ui::MenuModel implementation.
35  virtual bool HasIcons() const  { return false; }
36  virtual int GetItemCount() const;
37  virtual ui::MenuModel::ItemType GetTypeAt(int index) const;
38  virtual int GetCommandIdAt(int index) const { return index; }
39  virtual string16 GetLabelAt(int index) const;
40  virtual bool IsItemDynamicAt(int index) const { return true; }
41  virtual bool GetAcceleratorAt(int index,
42      ui::Accelerator* accelerator) const { return false; }
43  virtual bool IsItemCheckedAt(int index) const { return false; }
44  virtual int GetGroupIdAt(int index) const { return 0; }
45  virtual bool GetIconAt(int index, SkBitmap* icon) const { return false; }
46  virtual ui::ButtonMenuItemModel* GetButtonMenuItemAt(int index) const {
47    return NULL;
48  }
49  virtual bool IsEnabledAt(int index) const;
50  virtual ui::MenuModel* GetSubmenuModelAt(int index) const { return NULL; }
51  virtual void HighlightChangedTo(int index) {}
52  virtual void ActivatedAt(int index);
53  virtual void MenuWillShow() {}
54
55  // Overridden from ResumeLibrary::Observer:
56  virtual void PowerChanged(PowerLibrary* obj) {}
57  virtual void SystemResumed();
58
59  // Overridden from SystemLibrary::Observer:
60  virtual void TimezoneChanged(const icu::TimeZone& timezone);
61
62  // Updates the time on the menu button. Can be called by host if timezone
63  // changes.
64  void UpdateText();
65
66 protected:
67  virtual int horizontal_padding() { return 3; }
68
69 private:
70  // views::ViewMenuDelegate implementation.
71  virtual void RunMenu(views::View* source, const gfx::Point& pt);
72
73  // Updates text and schedules the timer to fire at the next minute interval.
74  void UpdateTextAndSetNextTimer();
75
76  base::OneShotTimer<ClockMenuButton> timer_;
77
78  // The clock menu.
79  // NOTE: we use a scoped_ptr here as menu calls into 'this' from the
80  // constructor.
81  scoped_ptr<views::Menu2> clock_menu_;
82
83  StatusAreaHost* host_;
84
85  DISALLOW_COPY_AND_ASSIGN(ClockMenuButton);
86};
87
88}  // namespace chromeos
89
90#endif  // CHROME_BROWSER_CHROMEOS_STATUS_CLOCK_MENU_BUTTON_H_
91