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]. OnSpeechSoundLevelChanged(uint8 level)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. OnSpeechResult(const base::string16 & result,bool is_final)32 virtual void OnSpeechResult(const base::string16& result, bool is_final) {} 33 34 // Invoked when the state of speech recognition is changed. OnSpeechRecognitionStateChanged(SpeechRecognitionState new_state)35 virtual void OnSpeechRecognitionStateChanged( 36 SpeechRecognitionState new_state) {} 37 38 protected: ~SpeechUIModelObserver()39 virtual ~SpeechUIModelObserver() {} 40 }; 41 42 } // namespace app_list 43 44 #endif // UI_APP_LIST_SPEECH_UI_MODEL_OBSERVER_H_ 45