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1 // Copyright 2016 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_ACTIVATION_OBSERVER_H_ | |
6 #define ASH_COMMON_WM_ACTIVATION_OBSERVER_H_ | |
7 | |
8 #include "ash/ash_export.h" | |
9 | |
10 namespace ash { | |
11 | |
12 class WmWindow; | |
13 | |
14 // Used to track changes in activation. | |
15 class ASH_EXPORT WmActivationObserver { | |
16 public: | |
17 virtual void OnWindowActivated(WmWindow* gained_active, | |
18 WmWindow* lost_active) {} | |
19 | |
20 // Called when during window activation the currently active window is | |
21 // selected for activation. This can happen when a window requested for | |
22 // activation cannot be activated because a system modal window is active. | |
23 virtual void OnAttemptToReactivateWindow(WmWindow* request_active, | |
24 WmWindow* actual_active) {} | |
25 | |
26 protected: | |
27 virtual ~WmActivationObserver() {} | |
28 }; | |
29 | |
30 } // namespace ash | |
31 | |
32 #endif // ASH_COMMON_WM_ACTIVATION_OBSERVER_H_ | |
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