ash/wm/gestures/long_press_affordance_handler.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_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_
   6 #define ASH_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_
   7
   8 #include "base/timer/timer.h"
   9 #include "ui/gfx/animation/animation_delegate.h"
  10 #include "ui/gfx/animation/linear_animation.h"
  11 #include "ui/gfx/point.h"
  12
  13 namespace aura {
  14 class Window;
  15 }
  16
  17 namespace ui {
  18 class LocatedEvent;
  19 }
  20
  21 namespace ash {
  22
  23 namespace test {
  24 class SystemGestureEventFilterTest;
  25 }
  26
  27 namespace internal {
  28
  29 // LongPressAffordanceHandler displays an animated affordance that is shown
  30 // on a TAP_DOWN gesture. The animation sequence consists of two parts:
  31 // The first part is a grow animation that starts at semi-long-press and
  32 // completes on a long-press gesture. The affordance animates to full size
  33 // during grow animation.
  34 // The second part is a shrink animation that start after grow and shrinks the
  35 // affordance out of view.
  36 class LongPressAffordanceHandler : public gfx::AnimationDelegate,
  37                                    public gfx::LinearAnimation {
  38  public:
  39   LongPressAffordanceHandler();
  40   virtual ~LongPressAffordanceHandler();
  41
  42   // Display or removes long press affordance according to the |event|.
  43   void ProcessEvent(aura::Window* target,
  44                     ui::LocatedEvent* event,
  45                     int touch_id);
  46
  47  private:
  48   friend class ash::test::SystemGestureEventFilterTest;
  49
  50   enum LongPressAnimationType {
  51     NONE,
  52     GROW_ANIMATION,
  53     SHRINK_ANIMATION,
  54   };
  55
  56   void StartAnimation();
  57   void StopAnimation();
  58
  59   // Overridden from gfx::LinearAnimation.
  60   virtual void AnimateToState(double state) OVERRIDE;
  61   virtual bool ShouldSendCanceledFromStop() OVERRIDE;
  62
  63   // Overridden from gfx::AnimationDelegate.
  64   virtual void AnimationEnded(const gfx::Animation* animation) OVERRIDE;
  65
  66   class LongPressAffordanceView;
  67   scoped_ptr<LongPressAffordanceView> view_;
  68   gfx::Point tap_down_location_;
  69   int tap_down_touch_id_;
  70   base::OneShotTimer<LongPressAffordanceHandler> timer_;
  71   int64 tap_down_display_id_;
  72   LongPressAnimationType current_animation_type_;
  73
  74   DISALLOW_COPY_AND_ASSIGN(LongPressAffordanceHandler);
  75 };
  76
  77 }  // namespace internal
  78 }  // namespace ash
  79
  80 #endif  // ASH_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_