wip: Second crack at implementing the touch exploration mode.

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/accessibility_delegate.h"

[Daniel Erat, 2014/04/18 00:44:08]

do you need this include?

 #include "ash/ash_export.h"
 #include "ash/shelf/shelf_types.h"
 #include "ash/shell_observer.h"
+#include "ash/system/tray_accessibility.h"
 #include "ash/system/user/login_status.h"
+#include "ash/touch/touch_exploration_controller.h"

[Daniel Erat, 2014/04/18 00:44:08]

forward-declare TouchExplorationController and move this include to the .cc file
if possible

 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/ui_base_types.h"
 
 class SkBitmap;
 
 namespace aura {
 class EventFilter;
@@ skipping 46 matching lines @@
 class BootSplashScreen;
 #endif
 
 // 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. This object is
 // indirectly owned and deleted by |DisplayController|.
 // The RootWindowController for particular root window is stored in
 // its property (RootWindowSettings) and can be obtained using
 // |GetRootWindowController(aura::WindowEventDispatcher*)| function.
-class ASH_EXPORT RootWindowController : public ShellObserver {
+class ASH_EXPORT RootWindowController : public ShellObserver,
+                                        public AccessibilityObserver {
  public:
 
   // Creates and Initialize the RootWindowController for primary display.
   static void CreateForPrimaryDisplay(AshWindowTreeHost* host);
 
   // Creates and Initialize the RootWindowController for secondary displays.
   static void CreateForSecondaryDisplay(AshWindowTreeHost* host);
 
   // Creates and Initialize the RootWindowController for virtual
   // keyboard displays.
@@ skipping 173 matching lines @@
   // 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;
 
+  void UpdateTouchExplorationState();

[Daniel Erat, 2014/04/18 00:44:08]

nit: add a comment and move this above the ShellObserver overrides

+
+  // Overridden from AccessibilityObserver.
+  virtual void OnAccessibilityModeChanged(
+      AccessibilityNotificationVisibility notify) OVERRIDE;
+
   scoped_ptr<AshWindowTreeHost> ash_host_;
   RootWindowLayoutManager* root_window_layout_;
 
   scoped_ptr<StackingController> stacking_controller_;
 
   // The shelf for managing the shelf and the status widget.
   scoped_ptr<ShelfWidget> shelf_;
 
   // An invisible/empty window used as a event target for
   // |MouseCursorEventFilter| before a user logs in.
@@ skipping 22 matching lines @@
   TouchHudDebug* touch_hud_debug_;
   TouchHudProjection* touch_hud_projection_;
 
   // Handles double clicks on the panel window header.
   scoped_ptr<ui::EventHandler> panel_container_handler_;
 
   scoped_ptr<DesktopBackgroundWidgetController> wallpaper_controller_;
   scoped_ptr<AnimatingDesktopController> animating_wallpaper_controller_;
   scoped_ptr< ::wm::ScopedCaptureClient> capture_client_;
 
+  scoped_ptr<TouchExplorationController> touch_exploration_controller_;
+
   DISALLOW_COPY_AND_ASSIGN(RootWindowController);
 };
 
 
 // Gets the RootWindowController for |root_window|.
 ASH_EXPORT RootWindowController* GetRootWindowController(
     const aura::Window* root_window);
 
 }  // ash
 
 #endif  //  ASH_ROOT_WINDOW_CONTROLLER_H_