athena/wm/public/window_manager_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 ATHENA_SCREEN_PUBLIC_WINDOW_MANAGER_OBSERVER_H_
   6 #define ATHENA_SCREEN_PUBLIC_WINDOW_MANAGER_OBSERVER_H_
   7
   8 #include "athena/athena_export.h"
   9
  10 namespace athena {
  11
  12 class ATHENA_EXPORT WindowManagerObserver {
  13  public:
  14   virtual ~WindowManagerObserver() {}
  15
  16   // Called immediately before the overview mode is displayed.
  17   virtual void OnOverviewModeEnter() = 0;
  18
  19   // Called immediately after going out of the overview mode.
  20   virtual void OnOverviewModeExit() = 0;
  21
  22   // Called after the activity order has changed.
  23   virtual void OnActivityOrderHasChanged() = 0;
  24 };
  25
  26 }  // namespace athena
  27
  28 #endif  // ATHENA_SCREEN_PUBLIC_WINDOW_MANAGER_OBSERVER_H_