ash/shell_observer.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_SHELL_OBSERVER_H_
   6 #define ASH_SHELL_OBSERVER_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/system/user/login_status.h"
  10
  11 namespace aura {
  12 class RootWindow;
  13 }
  14
  15 namespace ash {
  16
  17 class ASH_EXPORT ShellObserver {
  18  public:
  19   // Invoked after the screen's work area insets changes.
  20   virtual void OnDisplayWorkAreaInsetsChanged() {}
  21
  22   // Invoked when the user logs in.
  23   virtual void OnLoginStateChanged(user::LoginStatus status) {}
  24
  25   // Invoked when the application is exiting.
  26   virtual void OnAppTerminating() {}
  27
  28   // Invoked when the screen is locked (after the lock window is visible) or
  29   // unlocked.
  30   virtual void OnLockStateChanged(bool locked) {}
  31
  32   // Invoked when the shelf alignment in |root_window| is changed.
  33   virtual void OnShelfAlignmentChanged(aura::RootWindow* root_window) {}
  34
  35   // Invoked when the projection touch HUD is toggled.
  36   virtual void OnTouchHudProjectionToggled(bool enabled) {}
  37
  38  protected:
  39   virtual ~ShellObserver() {}
  40 };
  41
  42 }  // namespace ash
  43
  44 #endif  // ASH_SHELL_OBSERVER_H_