window_state_observer.h revision 5d1f7b1de12d16ceb2c938c56701a3e8bfa558f7
1// Copyright 2013 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_WM_WINDOW_STATE_OBSERVER_H_ 6#define ASH_WM_WINDOW_STATE_OBSERVER_H_ 7 8#include "ash/ash_export.h" 9#include "ash/wm/wm_types.h" 10 11namespace ash { 12namespace wm { 13class WindowState; 14 15class ASH_EXPORT WindowStateObserver { 16 public: 17 // Following observer methods are different from kWindowShowStatekey 18 // property change as they will be invoked when the window 19 // gets left/right maximized, and auto positioned. |old_type| is the value 20 // before the change. 21 22 // Called after the window's show type is set to new type, but before 23 // the window's bounds has been updated for the new type. 24 // This is used to update the shell state such as work area so 25 // that the window can use the correct environment to update its bounds. 26 // TODO(oshima): Remove this once docked windows has its own state. 27 virtual void OnPreWindowShowTypeChange(WindowState* window_state, 28 WindowShowType old_type) {} 29 30 // Called after the window's state has been changed for the new show type. 31 // This is used to update the shell state that depends on the update 32 // window bounds, such as shelf visibility. 33 virtual void OnPostWindowShowTypeChange(WindowState* window_state, 34 WindowShowType old_type) {} 35}; 36 37} // namespace wm 38} // namespace ash 39 40#endif // ASH_WM_WINDOW_STATE_OBSERVER_H_ 41