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 class TouchPointView;
  14
  15 // A heads-up display to show active touch points on the screen. As a derivative
  16 // of TouchObserverHUD, objects of this class manage their own lifetime.
  17 class TouchHudProjection : public TouchObserverHUD {
  18  public:
  19   explicit TouchHudProjection(aura::Window* initial_root);
  20
  21   // Overriden from TouchObserverHUD.
  22   void Clear() override;
  23
  24  private:
  25   friend class TouchHudProjectionTest;
  26
  27   ~TouchHudProjection() override;
  28
  29   // Overriden from TouchObserverHUD.
  30   void OnTouchEvent(ui::TouchEvent* event) override;
  31   void SetHudForRootWindowController(RootWindowController* controller) override;
  32   void UnsetHudForRootWindowController(
  33       RootWindowController* controller) override;
  34
  35   std::map<int, TouchPointView*> points_;
  36
  37   DISALLOW_COPY_AND_ASSIGN(TouchHudProjection);
  38 };
  39
  40 }  // namespace ash
  41
  42 #endif  // ASH_TOUCH_TOUCH_HUD_PROJECTION_H_