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      1 // Copyright 2013 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 WIN8_METRO_DRIVER_IME_IME_POPUP_OBSERVER_H_
      6 #define WIN8_METRO_DRIVER_IME_IME_POPUP_OBSERVER_H_
      7 
      8 namespace metro_driver {
      9 
     10 // An observer interface implemented by objects that want to be informed when
     11 // an IME shows or hides its popup window.
     12 class ImePopupObserver {
     13  public:
     14   enum EventType {
     15     kPopupShown,
     16     kPopupHidden,
     17     kPopupUpdated,
     18   };
     19   virtual ~ImePopupObserver() {}
     20 
     21   // Called whenever an IME's popup window is changed.
     22   virtual void OnImePopupChanged(EventType type) = 0;
     23 };
     24 
     25 }  // namespace metro_driver
     26 
     27 #endif  // WIN8_METRO_DRIVER_IME_IME_POPUP_OBSERVER_H_
     28