ash/touch/touch_uma.h

   1 // Copyright (c) 2012 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_OBSERVER_UMA_H_
   6 #define ASH_TOUCH_TOUCH_OBSERVER_UMA_H_
   7
   8 #include <map>
   9
  10 #include "ash/shell.h"
  11 #include "ui/gfx/point.h"
  12 #include "ui/views/widget/widget.h"
  13
  14 namespace aura {
  15 class Window;
  16 }
  17
  18 namespace ash {
  19 namespace internal {
  20
  21 // Records some touch/gesture event specific details (e.g. what gestures are
  22 // targetted to which components etc.)
  23 class TouchUMA {
  24  public:
  25   TouchUMA();
  26   ~TouchUMA();
  27
  28   void RecordGestureEvent(aura::Window* target,
  29                           const ui::GestureEvent& event);
  30   void RecordTouchEvent(aura::Window* target,
  31                         const ui::TouchEvent& event);
  32
  33  private:
  34   void UpdateBurstData(const ui::TouchEvent& event);
  35
  36   // These are used to measure the number of touch-start events we receive in a
  37   // quick succession, regardless of the target window.
  38   bool touch_in_progress_;
  39   int burst_length_;
  40   base::TimeDelta last_touch_down_time_;
  41
  42   DISALLOW_COPY_AND_ASSIGN(TouchUMA);
  43 };
  44
  45 }  // namespace internal
  46 }  // namespace ash
  47
  48 #endif  // ASH_TOUCH_TOUCH_OBSERVER_UMA_H_