ui/aura/client/focus_change_observer.h

   1 // Copyright (c) 2012 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_AURA_CLIENT_FOCUS_CHANGE_OBSERVER_H_
   6 #define UI_AURA_CLIENT_FOCUS_CHANGE_OBSERVER_H_
   7
   8 #include "ui/aura/aura_export.h"
   9
  10 namespace aura {
  11 class Window;
  12 namespace client {
  13
  14 // TODO(beng): this interface will be OBSOLETE by FocusChangeEvent.
  15 class AURA_EXPORT FocusChangeObserver {
  16  public:
  17   // Called when focus moves from |lost_focus| to |gained_focus|.
  18   virtual void OnWindowFocused(Window* gained_focus, Window* lost_focus) = 0;
  19
  20  protected:
  21   virtual ~FocusChangeObserver() {}
  22 };
  23
  24 AURA_EXPORT FocusChangeObserver* GetFocusChangeObserver(Window* window);
  25 AURA_EXPORT void SetFocusChangeObserver(
  26     Window* window,
  27     FocusChangeObserver* focus_change_observer);
  28
  29
  30 }  // namespace client
  31 }  // namespace aura
  32
  33 #endif  // UI_AURA_CLIENT_FOCUS_CHANGE_OBSERVER_H_