1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _UI_INPUTREADER_CURSOR_SCROLL_ACCUMULATOR_H 18 #define _UI_INPUTREADER_CURSOR_SCROLL_ACCUMULATOR_H 19 20 #include <stdint.h> 21 22 namespace android { 23 24 class InputDeviceContext; 25 struct RawEvent; 26 27 /* Keeps track of cursor scrolling motions. */ 28 29 class CursorScrollAccumulator { 30 public: 31 CursorScrollAccumulator(); 32 void configure(InputDeviceContext& deviceContext); 33 void reset(InputDeviceContext& deviceContext); 34 35 void process(const RawEvent* rawEvent); 36 void finishSync(); 37 haveRelativeVWheel()38 inline bool haveRelativeVWheel() const { return mHaveRelWheel; } haveRelativeHWheel()39 inline bool haveRelativeHWheel() const { return mHaveRelHWheel; } 40 getRelativeX()41 inline int32_t getRelativeX() const { return mRelX; } getRelativeY()42 inline int32_t getRelativeY() const { return mRelY; } getRelativeVWheel()43 inline int32_t getRelativeVWheel() const { return mRelWheel; } getRelativeHWheel()44 inline int32_t getRelativeHWheel() const { return mRelHWheel; } 45 46 private: 47 bool mHaveRelWheel; 48 bool mHaveRelHWheel; 49 50 int32_t mRelX; 51 int32_t mRelY; 52 int32_t mRelWheel; 53 int32_t mRelHWheel; 54 55 void clearRelativeAxes(); 56 }; 57 58 } // namespace android 59 60 #endif // _UI_INPUTREADER_CURSOR_SCROLL_ACCUMULATOR_H