1a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// Copyright 2014 The Chromium Authors. All rights reserved. 2a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 3a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// found in the LICENSE file. 4a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 5a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#ifndef UI_EVENTS_GESTURE_DETECTION_VELOCITY_TRACKER_STATE_H_ 6a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#define UI_EVENTS_GESTURE_DETECTION_VELOCITY_TRACKER_STATE_H_ 7a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 8a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "base/basictypes.h" 9a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "ui/events/gesture_detection/bitset_32.h" 10a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "ui/events/gesture_detection/gesture_detection_export.h" 11a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "ui/events/gesture_detection/velocity_tracker.h" 12a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 13a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)namespace ui { 14a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 15a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)class MotionEvent; 16a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 17a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// Port of VelocityTrackerState from Android 18a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// * platform/frameworks/base/core/jni/android_view_VelocityTracker.cpp 19a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// * Change-Id: I3517881b87b47dcc209d80dbd0ac6b5cf29a766f 20a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// * Please update the Change-Id as upstream Android changes are pulled. 21a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)class GESTURE_DETECTION_EXPORT VelocityTrackerState { 22a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) public: 23a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) VelocityTrackerState(); 24a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) explicit VelocityTrackerState(VelocityTracker::Strategy strategy); 25a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) ~VelocityTrackerState(); 26a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 27a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void Clear(); 28a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void AddMovement(const MotionEvent& event); 29a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void ComputeCurrentVelocity(int32_t units, float max_velocity); 30a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) float GetXVelocity(int32_t id) const; 31a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) float GetYVelocity(int32_t id) const; 32a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 33a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) private: 34a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) struct Velocity { 35a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) float vx, vy; 36a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) }; 37a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 38a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void GetVelocity(int32_t id, float* out_vx, float* out_vy) const; 39a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 40a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) VelocityTracker velocity_tracker_; 41a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) int32_t active_pointer_id_; 42a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) BitSet32 calculated_id_bits_; 43a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Velocity calculated_velocity_[VelocityTracker::MAX_POINTERS]; 44a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 45a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(VelocityTrackerState); 46a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)}; 47a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 48a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} // namespace ui 49a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 50a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#endif // UI_EVENTS_GESTURE_DETECTION_VELOCITY_TRACKER_STATE_H_ 51