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 #pragma once
18 
19 #include <stdint.h>
20 
21 namespace android {
22 
23 class InputDeviceContext;
24 struct RawEvent;
25 
26 /* Keeps track of the state of single-touch protocol. */
27 class SingleTouchMotionAccumulator {
28 public:
29     SingleTouchMotionAccumulator();
30 
31     void process(const RawEvent& rawEvent);
32     void reset(InputDeviceContext& deviceContext);
33 
getAbsoluteX()34     inline int32_t getAbsoluteX() const { return mAbsX; }
getAbsoluteY()35     inline int32_t getAbsoluteY() const { return mAbsY; }
getAbsolutePressure()36     inline int32_t getAbsolutePressure() const { return mAbsPressure; }
getAbsoluteToolWidth()37     inline int32_t getAbsoluteToolWidth() const { return mAbsToolWidth; }
getAbsoluteDistance()38     inline int32_t getAbsoluteDistance() const { return mAbsDistance; }
getAbsoluteTiltX()39     inline int32_t getAbsoluteTiltX() const { return mAbsTiltX; }
getAbsoluteTiltY()40     inline int32_t getAbsoluteTiltY() const { return mAbsTiltY; }
41 
42 private:
43     int32_t mAbsX;
44     int32_t mAbsY;
45     int32_t mAbsPressure;
46     int32_t mAbsToolWidth;
47     int32_t mAbsDistance;
48     int32_t mAbsTiltX;
49     int32_t mAbsTiltY;
50 
51     void clearAbsoluteAxes();
52 };
53 
54 } // namespace android
55