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- // 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_
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