1// Copyright 2014 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 UI_WM_CORE_TRANSIENT_WINDOW_OBSERVER_H_
6#define UI_WM_CORE_TRANSIENT_WINDOW_OBSERVER_H_
7
8#include "ui/wm/wm_export.h"
9
10namespace aura {
11class Window;
12}
13
14namespace wm {
15
16class WM_EXPORT TransientWindowObserver {
17 public:
18  // Called when a transient child is added to |window|.
19  virtual void OnTransientChildAdded(aura::Window* window,
20                                     aura::Window* transient) = 0;
21
22  // Called when a transient child is removed from |window|.
23  virtual void OnTransientChildRemoved(aura::Window* window,
24                                       aura::Window* transient) = 0;
25
26 protected:
27  virtual ~TransientWindowObserver() {}
28};
29
30}  // namespace wm
31
32#endif  // UI_WM_CORE_TRANSIENT_WINDOW_OBSERVER_H_
33