ui/app_list/speech_ui_model_observer.h

   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 UI_APP_LIST_SPEECH_UI_MODEL_OBSERVER_H_
   6 #define UI_APP_LIST_SPEECH_UI_MODEL_OBSERVER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/strings/string16.h"
  10 #include "ui/app_list/app_list_export.h"
  11
  12 namespace app_list {
  13
  14 enum SpeechRecognitionState {
  15   SPEECH_RECOGNITION_OFF = 0,
  16   SPEECH_RECOGNITION_READY,
  17   SPEECH_RECOGNITION_HOTWORD_LISTENING,
  18   SPEECH_RECOGNITION_RECOGNIZING,
  19   SPEECH_RECOGNITION_IN_SPEECH,
  20   SPEECH_RECOGNITION_STOPPING,
  21   SPEECH_RECOGNITION_NETWORK_ERROR,
  22 };
  23
  24 class APP_LIST_EXPORT SpeechUIModelObserver {
  25  public:
  26   // Invoked when sound level for the speech recognition has changed. |level|
  27   // represents the current sound-level in the range of [0, 255].
  28   virtual void OnSpeechSoundLevelChanged(uint8 level) {}
  29
  30   // Invoked when a speech result arrives. |is_final| is true only when the
  31   // speech result is final.
  32   virtual void OnSpeechResult(const base::string16& result, bool is_final) {}
  33
  34   // Invoked when the state of speech recognition is changed.
  35   virtual void OnSpeechRecognitionStateChanged(
  36       SpeechRecognitionState new_state) {}
  37
  38  protected:
  39   virtual ~SpeechUIModelObserver() {}
  40 };
  41
  42 }  // namespace app_list
  43
  44 #endif  // UI_APP_LIST_SPEECH_UI_MODEL_OBSERVER_H_