ash/ash_touch_exploration_manager_chromeos.h

   1 // Copyright 2014 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 ASH_TOUCH_EXPLORATION_MANAGER_CHROMEOS_H_
   6 #define ASH_TOUCH_EXPLORATION_MANAGER_CHROMEOS_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/system/tray_accessibility.h"
  10 #include "ui/chromeos/touch_exploration_controller.h"
  11
  12 namespace chromeos {
  13 class CrasAudioHandler;
  14 }
  15
  16 namespace ash {
  17 class RootWindowController;
  18
  19 // Responsible for initializing TouchExplorationController when spoken
  20 // feedback is on for ChromeOS only. This class implements
  21 // TouchExplorationControllerDelegate which allows touch gestures to manipulate
  22 // the system.
  23 class ASH_EXPORT AshTouchExplorationManager
  24     : public ash::AccessibilityObserver,
  25       public ui::TouchExplorationControllerDelegate {
  26  public:
  27   explicit AshTouchExplorationManager(
  28       RootWindowController* root_window_controller);
  29   virtual ~AshTouchExplorationManager();
  30
  31   // AccessibilityObserver overrides:
  32   virtual void OnAccessibilityModeChanged(
  33       AccessibilityNotificationVisibility notify) OVERRIDE;
  34
  35   // TouchExplorationControllerDelegate overrides:
  36   virtual void SetOutputLevel(int volume) OVERRIDE;
  37   virtual void SilenceSpokenFeedback() OVERRIDE;
  38   virtual void PlayVolumeAdjustEarcon() OVERRIDE;
  39   virtual void PlayPassthroughEarcon() OVERRIDE;
  40   virtual void PlayExitScreenEarcon() OVERRIDE;
  41   virtual void PlayEnterScreenEarcon() OVERRIDE;
  42
  43  private:
  44   void UpdateTouchExplorationState();
  45   bool VolumeAdjustSoundEnabled();
  46
  47   scoped_ptr<ui::TouchExplorationController> touch_exploration_controller_;
  48   RootWindowController* root_window_controller_;
  49   chromeos::CrasAudioHandler* audio_handler_;
  50
  51   DISALLOW_COPY_AND_ASSIGN(AshTouchExplorationManager);
  52 };
  53
  54 }  // namespace ash
  55
  56 #endif  // ASH_TOUCH_EXPLORATION_MANAGER_CHROMEOS_H_