// Copyright 2013 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef ASH_WM_WINDOW_STATE_OBSERVER_H_ #define ASH_WM_WINDOW_STATE_OBSERVER_H_ #include "ash/ash_export.h" namespace chromeos { enum class WindowStateType; } namespace ash { class WindowState; class ASH_EXPORT WindowStateObserver { public: virtual ~WindowStateObserver() {} // Following observer methods are different from kWindowShowStatekey // property change as they will be invoked when the window // gets left/right maximized, and auto positioned. |old_type| is the value // before the change. // Called after the window's state type is set to new type, but before // the window's bounds has been updated for the new type. // This is used to update the shell state such as work area so // that the window can use the correct environment to update its bounds. virtual void OnPreWindowStateTypeChange(WindowState* window_state, chromeos::WindowStateType old_type) {} // Called after the window's state has been updated. // This is used to update the shell state that depends on the updated // window bounds, such as shelf visibility. virtual void OnPostWindowStateTypeChange(WindowState* window_state, chromeos::WindowStateType old_type) { } }; } // namespace ash #endif // ASH_WM_WINDOW_STATE_OBSERVER_H_