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 11namespace aura { 12class Window; 13} 14 15namespace ash { 16 17class 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 after a non-primary root window is created. 33 virtual void OnRootWindowAdded(aura::Window* root_window) {} 34 35 // Invoked after the shelf has been created for |root_window|. 36 virtual void OnShelfCreatedForRootWindow(aura::Window* root_window) {} 37 38 // Invoked when the shelf alignment in |root_window| is changed. 39 virtual void OnShelfAlignmentChanged(aura::Window* root_window) {} 40 41 // Invoked when the projection touch HUD is toggled. 42 virtual void OnTouchHudProjectionToggled(bool enabled) {} 43 44 // Invoked when entering or exiting fullscreen mode in |root_window|. 45 virtual void OnFullscreenStateChanged(bool is_fullscreen, 46 aura::Window* root_window) {} 47 48 // Called when the overview mode is about to be started (before the windows 49 // get re-arranged). 50 virtual void OnOverviewModeStarting() {} 51 52 // Called before the overview mode is ending (before the windows get arranged 53 // to their final position). 54 virtual void OnOverviewModeEnding() {} 55 56 // Called when the always maximize mode has started. Windows might still 57 // animate though. 58 virtual void OnMaximizeModeStarted() {} 59 60 // Called when the always maximize mode has ended. Windows may still be 61 // animating but have been restored. 62 virtual void OnMaximizeModeEnded() {} 63 64 protected: 65 virtual ~ShellObserver() {} 66}; 67 68} // namespace ash 69 70#endif // ASH_SHELL_OBSERVER_H_ 71