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 <input/Input.h> 20 21 #include <limits.h> 22 23 namespace android { 24 25 struct StylusState { 26 /* Time the stylus event was received. */ 27 nsecs_t when{}; 28 /* 29 * Pressure as reported by the stylus if supported, normalized to the range [0, 1.0]. 30 * The presence of a pressure value indicates that the stylus is able to tell whether it is 31 * touching the display. 32 */ 33 std::optional<float> pressure{}; 34 /* The state of the stylus buttons as a bitfield (e.g. AMOTION_EVENT_BUTTON_SECONDARY). */ 35 uint32_t buttons{}; 36 /* Which tool type the stylus is currently using (e.g. ToolType::ERASER). */ 37 ToolType toolType{ToolType::UNKNOWN}; 38 clearStylusState39 void clear() { *this = StylusState{}; } 40 }; 41 42 } // namespace android 43