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. OnDisplayWorkAreaInsetsChanged()20 virtual void OnDisplayWorkAreaInsetsChanged() {} 21 22 // Invoked when the user logs in. OnLoginStateChanged(user::LoginStatus status)23 virtual void OnLoginStateChanged(user::LoginStatus status) {} 24 25 // Invoked when the application is exiting. OnAppTerminating()26 virtual void OnAppTerminating() {} 27 28 // Invoked when the screen is locked (after the lock window is visible) or 29 // unlocked. OnLockStateChanged(bool locked)30 virtual void OnLockStateChanged(bool locked) {} 31 32 // Invoked when the shelf alignment in |root_window| is changed. OnShelfAlignmentChanged(aura::Window * root_window)33 virtual void OnShelfAlignmentChanged(aura::Window* root_window) {} 34 35 // Invoked when the projection touch HUD is toggled. OnTouchHudProjectionToggled(bool enabled)36 virtual void OnTouchHudProjectionToggled(bool enabled) {} 37 38 // Invoked when entering or exiting fullscreen mode in |root_window|. OnFullscreenStateChanged(bool is_fullscreen,aura::Window * root_window)39 virtual void OnFullscreenStateChanged(bool is_fullscreen, 40 aura::Window* root_window) {} 41 42 protected: ~ShellObserver()43 virtual ~ShellObserver() {} 44 }; 45 46 } // namespace ash 47 48 #endif // ASH_SHELL_OBSERVER_H_ 49