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_H_
6#define UI_APP_LIST_SPEECH_UI_MODEL_H_
7
8#include "base/basictypes.h"
9#include "base/observer_list.h"
10#include "base/strings/string16.h"
11#include "ui/app_list/app_list_export.h"
12#include "ui/app_list/speech_ui_model_observer.h"
13#include "ui/gfx/image/image_skia.h"
14
15namespace app_list {
16
17// SpeechUIModel provides the interface to update the UI for speech recognition.
18class APP_LIST_EXPORT SpeechUIModel {
19 public:
20  // Construct the model, initially in state SPEECH_RECOGNITION_OFF.
21  SpeechUIModel();
22  virtual ~SpeechUIModel();
23
24  void SetSpeechResult(const base::string16& result, bool is_final);
25  void UpdateSoundLevel(int16 level);
26  void SetSpeechRecognitionState(SpeechRecognitionState new_state);
27
28  void AddObserver(SpeechUIModelObserver* observer);
29  void RemoveObserver(SpeechUIModelObserver* observer);
30
31  const base::string16& result() const { return result_; }
32  bool is_final() const { return is_final_; }
33  int16 sound_level() const { return sound_level_; }
34  SpeechRecognitionState state() const { return state_; }
35  const gfx::ImageSkia& logo() const { return logo_; }
36  void set_logo(const gfx::ImageSkia& logo) { logo_ = logo; }
37
38 private:
39  base::string16 result_;
40  bool is_final_;
41  int16 sound_level_;
42  SpeechRecognitionState state_;
43
44  // The logo image which the speech UI will show at the top-left.
45  gfx::ImageSkia logo_;
46
47  // The sound level range to compute visible sound-level.
48  int16 minimum_sound_level_;
49  int16 maximum_sound_level_;
50
51  ObserverList<SpeechUIModelObserver> observers_;
52
53  DISALLOW_COPY_AND_ASSIGN(SpeechUIModel);
54};
55
56}  // namespace app_list
57
58#endif  // UI_APP_LIST_SPEECH_UI_MODEL_H_
59