| // 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_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_ |
| #define ASH_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_ |
| |
| #include "base/timer/timer.h" |
| #include "ui/aura/window_observer.h" |
| #include "ui/gfx/animation/linear_animation.h" |
| #include "ui/gfx/point.h" |
| |
| namespace ui { |
| class GestureEvent; |
| } |
| |
| namespace ash { |
| |
| namespace test { |
| class SystemGestureEventFilterTest; |
| } |
| |
| // LongPressAffordanceHandler displays an animated affordance that is shown |
| // on a TAP_DOWN gesture. The animation sequence consists of two parts: |
| // The first part is a grow animation that starts at semi-long-press and |
| // completes on a long-press gesture. The affordance animates to full size |
| // during grow animation. |
| // The second part is a shrink animation that start after grow and shrinks the |
| // affordance out of view. |
| class LongPressAffordanceHandler : public gfx::LinearAnimation, |
| public aura::WindowObserver { |
| public: |
| LongPressAffordanceHandler(); |
| virtual ~LongPressAffordanceHandler(); |
| |
| // Displays or removes long press affordance according to the |event|. |
| void ProcessEvent(aura::Window* target, ui::GestureEvent* event); |
| |
| private: |
| friend class ash::test::SystemGestureEventFilterTest; |
| |
| class LongPressAffordanceView; |
| |
| enum LongPressAnimationType { |
| NONE, |
| GROW_ANIMATION, |
| SHRINK_ANIMATION, |
| }; |
| |
| void StartAnimation(); |
| void StopAffordance(); |
| void SetTapDownTarget(aura::Window* target); |
| |
| // Overridden from gfx::LinearAnimation. |
| virtual void AnimateToState(double state) OVERRIDE; |
| virtual void AnimationStopped() OVERRIDE; |
| |
| // Overridden from aura::WindowObserver. |
| virtual void OnWindowDestroying(aura::Window* window) OVERRIDE; |
| |
| scoped_ptr<LongPressAffordanceView> view_; |
| gfx::Point tap_down_location_; |
| base::OneShotTimer<LongPressAffordanceHandler> timer_; |
| aura::Window* tap_down_target_; |
| LongPressAnimationType current_animation_type_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LongPressAffordanceHandler); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_WM_GESTURES_LONG_PRESS_AFFORDANCE_HANDLER_H_ |