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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"
#include "ash/wm/wm_types.h"
namespace ash {
namespace wm {
class WindowState;
class ASH_EXPORT WindowStateObserver {
public:
// 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.
// TODO(oshima): Remove this once docked windows has its own state.
virtual void OnPreWindowStateTypeChange(WindowState* window_state,
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,
WindowStateType old_type) {}
};
} // namespace wm
} // namespace ash
#endif // ASH_WM_WINDOW_STATE_OBSERVER_H_
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