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 Window;
  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::Window* root_window) {}
  34
  35   // Invoked when the projection touch HUD is toggled.
  36   virtual void OnTouchHudProjectionToggled(bool enabled) {}
  37
  38   // Invoked when entering or exiting fullscreen mode in |root_window|.
  39   virtual void OnFullscreenStateChanged(bool is_fullscreen,
  40                                         aura::Window* root_window) {}
  41
  42   // Called when the overview mode is about to be started (before the windows
  43   // get re-arranged).
  44   virtual void OnOverviewModeStarting() {}
  45
  46   // Called before the overview mode is ending (before the windows get arranged
  47   // to their final position).
  48   virtual void OnOverviewModeEnding() {}
  49
  50   // Called when the always maximize mode has started. Windows might still
  51   // animate though.
  52   virtual void OnMaximizeModeStarted() {}
  53
  54   // Called when the always maximize mode has ended. Windows may still be
  55   // animating but have been restored.
  56   virtual void OnMaximizeModeEnded() {}
  57
  58  protected:
  59   virtual ~ShellObserver() {}
  60 };
  61
  62 }  // namespace ash
  63
  64 #endif  // ASH_SHELL_OBSERVER_H_