Separate projection mode from rest of touch HUD

ash/touch/touch_observer_hud.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_TOUCH_TOUCH_OBSERVER_HUD_H_
 #define ASH_TOUCH_TOUCH_OBSERVER_HUD_H_
 
-#include <map>
-
 #include "ash/ash_export.h"
 #include "ash/display/display_controller.h"
-#include "ash/shell.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/values.h"
 #include "ui/base/events/event_handler.h"
 #include "ui/gfx/display_observer.h"
-#include "ui/gfx/point.h"
 #include "ui/views/widget/widget_observer.h"
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/display/output_configurator.h"
 #endif  // defined(OS_CHROMEOS)
 
-namespace aura {
-class Window;
-}
-
-namespace gfx {
-class Display;
-}
-
 namespace views {
-class Label;
-class View;
 class Widget;
 }
 
 namespace ash {
 namespace internal {
 
-class TouchHudCanvas;
-class TouchLog;
-class TouchPointView;
-
 // An event filter which handles system level gesture events. Objects of this
 // class manage their own lifetime.
 class ASH_EXPORT TouchObserverHUD
     : public ui::EventHandler,
       public views::WidgetObserver,
       public gfx::DisplayObserver,
 #if defined(OS_CHROMEOS)
       public chromeos::OutputConfigurator::Observer,
 #endif  // defined(OS_CHROMEOS)
       public DisplayController::Observer {
  public:
-  enum Mode {
-    FULLSCREEN,
-    REDUCED_SCALE,
-    PROJECTION,
-    INVISIBLE,
-  };
+  // Called to clear touch points and traces from the screen. Default
+  // implementation does nothing. Sub-classes should implement appropriately.
+  virtual void Clear();
 
+  // Removes the HUD from the screen.
+  void Remove();
+
+  int64 display_id() const { return display_id_; }
+
+ protected:
   explicit TouchObserverHUD(aura::RootWindow* initial_root);
 
-  // Returns the log of touch events as a dictionary mapping id of each display
-  // to its touch log.
-  static scoped_ptr<DictionaryValue> GetAllAsDictionary();
-
-  // Changes the display mode (e.g. scale, visibility). Calling this repeatedly
-  // cycles between a fixed number of display modes.
-  void ChangeToNextMode();
-
-  // Removes all existing touch points from the screen (only if the HUD is
-  // visible).
-  void Clear();
-
-  // Returns log of touch events as a list value. Each item in the list is a
-  // trace of one touch point.
-  scoped_ptr<ListValue> GetLogAsList() const;
-
-  Mode mode() const { return mode_; }
-
- private:
-  friend class TouchHudTest;
-
   virtual ~TouchObserverHUD();
 
-  void SetMode(Mode mode);
+  virtual void SetHudForRootWindowController(
+      RootWindowController* controller) = 0;
+  virtual void UnsetHudForRootWindowController(
+      RootWindowController* controller) = 0;
 
-  void UpdateTouchPointLabel(int index);
+  views::Widget* widget() { return widget_; }
 
-  // Overriden from ui::EventHandler:
+  // Overriden from ui::EventHandler.
   virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
 
-  // Overridden from views::WidgetObserver:
+  // Overridden from views::WidgetObserver.
   virtual void OnWidgetDestroying(views::Widget* widget) OVERRIDE;
 
-  // Overridden from gfx::DisplayObserver:
+  // Overridden from gfx::DisplayObserver.
   virtual void OnDisplayBoundsChanged(const gfx::Display& display) OVERRIDE;
   virtual void OnDisplayAdded(const gfx::Display& new_display) OVERRIDE;
   virtual void OnDisplayRemoved(const gfx::Display& old_display) OVERRIDE;
 
 #if defined(OS_CHROMEOS)
-  // Overriden from chromeos::OutputConfigurator::Observer:
+  // Overriden from chromeos::OutputConfigurator::Observer.
   virtual void OnDisplayModeChanged() OVERRIDE;
 #endif  // defined(OS_CHROMEOS)
 
-  // Overriden form DisplayController::Observer:
+  // Overriden form DisplayController::Observer.
   virtual void OnDisplayConfigurationChanging() OVERRIDE;
   virtual void OnDisplayConfigurationChanged() OVERRIDE;
 
-  static const int kMaxTouchPoints = 32;
+ private:
+  friend class TouchHudTest;
 
   const int64 display_id_;
   aura::RootWindow* root_window_;
 
-  Mode mode_;
-
-  scoped_ptr<TouchLog> touch_log_;
-
   views::Widget* widget_;
-  TouchHudCanvas* canvas_;
-  std::map<int, TouchPointView*> points_;
-  views::View* label_container_;
-  views::Label* touch_labels_[kMaxTouchPoints];
 
   DISALLOW_COPY_AND_ASSIGN(TouchObserverHUD);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_TOUCH_TOUCH_OBSERVER_HUD_H_