ash/touch/touch_hud_projection.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef ASH_TOUCH_TOUCH_HUD_PROJECTION_H_
   6 #define ASH_TOUCH_TOUCH_HUD_PROJECTION_H_
   7
   8 #include <map>
   9
  10 #include "ash/touch/touch_observer_hud.h"
  11
  12 namespace ash {
  13 namespace internal {
  14
  15 class TouchPointView;
  16
  17 // A heads-up display to show active touch points on the screen. As a derivative
  18 // of TouchObserverHUD, objects of this class manage their own lifetime.
  19 class TouchHudProjection : public TouchObserverHUD {
  20  public:
  21   explicit TouchHudProjection(aura::RootWindow* initial_root);
  22
  23   // Overriden from TouchObserverHUD.
  24   virtual void Clear() OVERRIDE;
  25
  26  private:
  27   virtual ~TouchHudProjection();
  28
  29   // Overriden from TouchObserverHUD.
  30   virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
  31   virtual void SetHudForRootWindowController(
  32       RootWindowController* controller) OVERRIDE;
  33   virtual void UnsetHudForRootWindowController(
  34       RootWindowController* controller) OVERRIDE;
  35
  36   std::map<int, TouchPointView*> points_;
  37
  38   DISALLOW_COPY_AND_ASSIGN(TouchHudProjection);
  39 };
  40
  41 }  // namespace internal
  42 }  // namespace ash
  43
  44 #endif  // ASH_TOUCH_TOUCH_HUD_PROJECTION_H_