Implementation of the Touch Exploration Mode - Part I (ui)

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/aura/window.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/ui_base_types.h"
 
+#if defined(OS_CHROMEOS)
+#include "ash/system/tray_accessibility.h"
+#include "ash/test/root_window_controller_test_api_chromeos.h"
+#endif
+
 class SkBitmap;
 
 namespace aura {
 class EventFilter;
 class Window;
 }
 
 namespace gfx {
 class Point;
 }
 
 namespace keyboard {
 class KeyboardController;
 }
 
 namespace ui {
 class EventHandler;
+
+#if defined(OS_CHROMEOS)
+class TouchExplorationController;
+#endif
 }
 
 namespace views {
 class Widget;
 }
 
 namespace wm {
 class InputMethodEventFilter;
 class RootWindowEventFilter;
 class ScopedCaptureClient;
@@ skipping 23 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 :
+#if defined(OS_CHROMEOS)
+                                        public AccessibilityObserver,
+#endif
+                                        public ShellObserver {
  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 141 matching lines @@
   // Activate virtual keyboard on current root window controller.
   void ActivateKeyboard(keyboard::KeyboardController* keyboard_controller);
 
   // Deactivate virtual keyboard on current root window controller.
   void DeactivateKeyboard(keyboard::KeyboardController* keyboard_controller);
 
   // Tests if a window is associated with the virtual keyboard.
   bool IsVirtualKeyboardWindow(aura::Window* window);
 
  private:
+#if defined(OS_CHROMEOS)
+  friend class ash::test::RootWindowControllerTestApi;
+#endif
+
   explicit RootWindowController(AshWindowTreeHost* host);
   enum RootWindowType {
     PRIMARY,
     SECONDARY,
     VIRTUAL_KEYBOARD
   };
 
   // Initializes the RootWindowController.  |is_primary| is true if
   // the controller is for primary display.  |first_run_after_boot| is
   // set to true only for primary root window after boot.
   void Init(RootWindowType root_window_type, bool first_run_after_boot);
 
   void InitLayoutManagers();
 
   // Initializes |system_background_| and possibly also |boot_splash_screen_|.
   // |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::Window* root_window);
 
+#if defined(OS_CHROMEOS)
+  void UpdateTouchExplorationState();
+#endif
+
   // 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;
 
+#if defined(OS_CHROMEOS)
+  // Overridden from AccessibilityObserver.
+  virtual void OnAccessibilityModeChanged(
+      AccessibilityNotificationVisibility notify) OVERRIDE;
+#endif
+
   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.
   // (crbug.com/266987)
   // Its container is |LockScreenBackgroundContainer| and
   // this must be deleted before the container is deleted.
   scoped_ptr<aura::Window> mouse_event_target_;
 
   // Manages layout of docked windows. Owned by DockedContainer.
   DockedWindowLayoutManager* docked_layout_manager_;
 
   // Manages layout of panels. Owned by PanelContainer.
   PanelLayoutManager* panel_layout_manager_;
 
   scoped_ptr<SystemBackgroundController> system_background_;
+
 #if defined(OS_CHROMEOS)
   scoped_ptr<BootSplashScreen> boot_splash_screen_;
+  scoped_ptr<ui::TouchExplorationController> touch_exploration_controller_;
 #endif
 
   scoped_ptr<ScreenDimmer> screen_dimmer_;
   scoped_ptr<WorkspaceController> workspace_controller_;
   scoped_ptr<AlwaysOnTopController> always_on_top_controller_;
 
   // Heads-up displays for touch events. These HUDs are not owned by the root
   // window controller and manage their own lifetimes.
   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_;
 
   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_