ash/system/session_length_limit/tray_session_length_limit.h

   1 // Copyright (c) 2012 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 ASH_SYSTEM_SESSION_LENGTH_LIMIT_TRAY_SESSION_LENGTH_LIMIT_H_
   6 #define ASH_SYSTEM_SESSION_LENGTH_LIMIT_TRAY_SESSION_LENGTH_LIMIT_H_
   7
   8 #include "ash/system/session_length_limit/session_length_limit_observer.h"
   9 #include "ash/system/tray/system_tray_item.h"
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/time.h"
  14 #include "base/timer.h"
  15
  16 namespace ash {
  17 namespace internal {
  18
  19 namespace tray {
  20 class RemainingSessionTimeNotificationView;
  21 class RemainingSessionTimeTrayView;
  22 }
  23
  24 // Adds a countdown timer to the system tray if the session length is limited.
  25 class TraySessionLengthLimit : public SystemTrayItem,
  26                                public SessionLengthLimitObserver {
  27  public:
  28   enum LimitState {
  29     LIMIT_NONE,
  30     LIMIT_SET,
  31     LIMIT_EXPIRING_SOON
  32   };
  33
  34   explicit TraySessionLengthLimit(SystemTray* system_tray);
  35   virtual ~TraySessionLengthLimit();
  36
  37   // SystemTrayItem:
  38   virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE;
  39   virtual views::View* CreateNotificationView(
  40       user::LoginStatus status) OVERRIDE;
  41   virtual void DestroyTrayView() OVERRIDE;
  42   virtual void DestroyNotificationView() OVERRIDE;
  43   virtual void UpdateAfterShelfAlignmentChange(
  44       ShelfAlignment alignment) OVERRIDE;
  45
  46   // SessionLengthLimitObserver:
  47   virtual void OnSessionStartTimeChanged() OVERRIDE;
  48   virtual void OnSessionLengthLimitChanged() OVERRIDE;
  49
  50   LimitState GetLimitState() const;
  51   base::TimeDelta GetRemainingSessionTime() const;
  52
  53  private:
  54   void ShowAndSpeakNotification();
  55   void Update();
  56
  57   tray::RemainingSessionTimeTrayView* tray_view_;
  58   tray::RemainingSessionTimeNotificationView* notification_view_;
  59
  60   LimitState limit_state_;
  61   base::TimeTicks session_start_time_;
  62   base::TimeDelta limit_;
  63   base::TimeDelta remaining_session_time_;
  64   scoped_ptr<base::RepeatingTimer<TraySessionLengthLimit> > timer_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(TraySessionLengthLimit);
  67 };
  68
  69 }  // namespace internal
  70 }  // namespace ash
  71
  72 #endif  // ASH_SYSTEM_SESSION_LENGTH_LIMIT_TRAY_SESSION_LENGTH_LIMIT_H_