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 11 namespace ash { 12 namespace wm { 13 class WindowState; 14 15 class 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 state 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 OnPreWindowStateTypeChange(WindowState* window_state, 28 WindowStateType old_type) {} 29 30 // Called after the window's state has been updated. 31 // This is used to update the shell state that depends on the updated 32 // window bounds, such as shelf visibility. 33 virtual void OnPostWindowStateTypeChange(WindowState* window_state, 34 WindowStateType old_type) {} 35 }; 36 37 } // namespace wm 38 } // namespace ash 39 40 #endif // ASH_WM_WINDOW_STATE_OBSERVER_H_ 41
