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