ui/wm/core/transient_window_observer.h

   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
  10 namespace aura {
  11 class Window;
  12 }
  13
  14 namespace wm {
  15
  16 class 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_