Add persisted preference for projection touch HUD

ash/root_window_controller.h

 // Copyright (c) 2012 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_ROOT_WINDOW_CONTROLLER_H_
 #define ASH_ROOT_WINDOW_CONTROLLER_H_
 
 #include <map>
 
 #include "ash/ash_export.h"
 #include "ash/shelf/shelf_types.h"
+#include "ash/shell_observer.h"
 #include "ash/system/user/login_status.h"
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/base/ui_base_types.h"
 
 class SkBitmap;
 
 namespace aura {
 class EventFilter;
 class RootWindow;
@@ skipping 39 matching lines @@
 class SystemModalContainerLayoutManager;
 class TouchHudDebug;
 class TouchHudProjection;
 class WorkspaceController;
 
 // This class maintains the per root window state for ash. This class
 // owns the root window and other dependent objects that should be
 // deleted upon the deletion of the root window.  The RootWindowController
 // for particular root window is stored as a property and can be obtained
 // using |GetRootWindowController(aura::RootWindow*)| function.
-class ASH_EXPORT RootWindowController {
+class ASH_EXPORT RootWindowController : public ShellObserver {
  public:
   explicit RootWindowController(aura::RootWindow* root_window);
-  ~RootWindowController();
+  virtual ~RootWindowController();
 
   // Returns a RootWindowController that has a launcher for given
   // |window|. This returns the RootWindowController for the |window|'s
   // root window when multiple launcher mode is enabled, or the primary
   // RootWindowController otherwise.
   static RootWindowController* ForLauncher(aura::Window* window);
 
   // Returns a RootWindowController of the window's root window.
   static RootWindowController* ForWindow(const aura::Window* window);
 
@@ skipping 30 matching lines @@
   // will not own the HUDs; their lifetimes are managed by themselves. Whenever
   // the widget showing a HUD is being destroyed (e.g. because of detaching a
   // display), the HUD deletes itself.
   void set_touch_hud_debug(TouchHudDebug* hud) {
     touch_hud_debug_ = hud;
   }
   void set_touch_hud_projection(TouchHudProjection* hud) {
     touch_hud_projection_ = hud;
   }
 
-  // Enables projection touch HUD.
-  void EnableTouchHudProjection();
-
-  // Disables projection touch HUD.
-  void DisableTouchHudProjection();
-
   DesktopBackgroundWidgetController* wallpaper_controller() {
     return wallpaper_controller_.get();
   }
   void SetWallpaperController(DesktopBackgroundWidgetController* controller);
   AnimatingDesktopController* animating_wallpaper_controller() {
     return animating_wallpaper_controller_.get();
   }
   void SetAnimatingWallpaperController(AnimatingDesktopController* controller);
 
   // Access the shelf layout manager associated with this root
@@ skipping 25 matching lines @@
   // Initializes the RootWindowController. |first_run_after_boot| is
   // set to true only for primary root window after boot.
   void Init(bool first_run_after_boot);
 
   // Show launcher view if it was created hidden (before session has started).
   void ShowLauncher();
 
   // Called when the launcher associated with this root window is created.
   void OnLauncherCreated();
 
-  // Called when the user logs in.
-  void OnLoginStateChanged(user::LoginStatus status);
-
   // Called when the login status changes after login (such as lock/unlock).
   // TODO(oshima): Investigate if we can merge this and |OnLoginStateChanged|.
   void UpdateAfterLoginStatusChange(user::LoginStatus status);
 
   // Called when the brightness/grayscale animation from white to the login
   // desktop background image has started.  Starts |boot_splash_screen_|'s
   // hiding animation (if the screen is non-NULL).
   void HandleInitialDesktopBackgroundAnimationStarted();
 
   // Called when the wallpaper ainmation is finished. Updates |background_|
@@ skipping 32 matching lines @@
   // |is_first_run_after_boot| determines the background's initial color.
   void CreateSystemBackground(bool is_first_run_after_boot);
 
   // Creates each of the special window containers that holds windows of various
   // types in the shell UI.
   void CreateContainersInRootWindow(aura::RootWindow* root_window);
 
   // Initializes the virtual keyboard.
   void InitKeyboard();
 
+  // Enables projection touch HUD.
+  void EnableTouchHudProjection();
+
+  // Disables projection touch HUD.
+  void DisableTouchHudProjection();
+
+  // Overridden from ShellObserver.
+  virtual void OnLoginStateChanged(user::LoginStatus status) OVERRIDE;
+  virtual void OnTouchHudProjectionToggled(bool enabled) OVERRIDE;
+
   scoped_ptr<aura::RootWindow> root_window_;
   RootWindowLayoutManager* root_window_layout_;
 
   scoped_ptr<StackingController> stacking_controller_;
 
   scoped_ptr<keyboard::KeyboardController> keyboard_controller_;
 
   // The shelf for managing the launcher and the status widget.
   scoped_ptr<ShelfWidget> shelf_;
 
@@ skipping 26 matching lines @@
   scoped_ptr<DesktopBackgroundWidgetController> wallpaper_controller_;
   scoped_ptr<AnimatingDesktopController> animating_wallpaper_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindowController);
 };
 
 }  // namespace internal
 }  // ash
 
 #endif  //  ASH_ROOT_WINDOW_CONTROLLER_H_