Side Slide Gestures for Accessibility

ash/ash_touch_exploration_manager_chromeos.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ASH_TOUCH_EXPLORATION_MANAGER_CHROMEOS_H_
+#define ASH_TOUCH_EXPLORATION_MANAGER_CHROMEOS_H_
+
+#include "ash/ash_export.h"
+#include "ash/system/tray_accessibility.h"
+#include "ui/chromeos/touch_exploration_controller.h"
+
+namespace chromeos {
+class CrasAudioHandler;
+}
+
+namespace ash {
+class RootWindowController;
+
+// Responsible for initializing TouchExplorationController when spoken
+// feedback is on for ChromeOS only. This class implements
+// TouchExplorationControllerDelegate which allows touch gestures to manipulate
+// the system.
+class ASH_EXPORT AshTouchExplorationManager
+    : public ash::AccessibilityObserver,
+      public ui::TouchExplorationControllerDelegate {
+ public:
+  explicit AshTouchExplorationManager(
+      RootWindowController* root_window_controller);
+  virtual ~AshTouchExplorationManager();
+
+  // AccessibilityObserver overrides:
+  virtual void OnAccessibilityModeChanged(
+      AccessibilityNotificationVisibility notify) OVERRIDE;
+
+  // TouchExplorationControllerDelegate overrides:
+  virtual void PlayVolumeAdjustSound() OVERRIDE;
+  virtual void SetOutputLevel(int volume) OVERRIDE;
+
+ private:
+  void UpdateTouchExplorationState();
+  bool VolumeAdjustSoundEnabled();
+
+  scoped_ptr<ui::TouchExplorationController> touch_exploration_controller_;
+  RootWindowController* root_window_controller_;
+  chromeos::CrasAudioHandler* audio_handler_;
+
+  DISALLOW_COPY_AND_ASSIGN(AshTouchExplorationManager);
+};
+
+}  // namespace ash
+
+#endif  // ASH_TOUCH_EXPLORATION_MANAGER_CHROMEOS_H_