1 /*
2  * Copyright (c) 2020-2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef GRAPHIC_LITE_INPUT_DEVICE_H
17 #define GRAPHIC_LITE_INPUT_DEVICE_H
18 
19 #include "gfx_utils/input_event_info.h"
20 #include "gfx_utils/heap_base.h"
21 
22 namespace OHOS {
23 /**
24  * @brief Input device base class.
25  */
26 class InputDevice : public HeapBase {
27 public:
InputDevice()28     InputDevice() : rawDataState_(STATE_RELEASE) {}
~InputDevice()29     virtual ~InputDevice() {}
30 
31     /**
32      * @brief Process event from input device driver.
33      */
34     void ProcessEvent();
35 
36     /**
37      * @brief Read data from hardware.User should override this to set data
38      *
39      * @param [out] input device data.
40      *
41      * @returns no more data to read if true.
42      */
43     virtual bool Read(DeviceData& data) = 0;
44 
45     constexpr static uint8_t STATE_RELEASE = 0;
46     constexpr static uint8_t STATE_PRESS = 1;
47 
OnViewLifeEvent()48     virtual void OnViewLifeEvent() {}
49 
50 protected:
51     uint16_t rawDataState_;
52 
53     /**
54      * @brief Dispatch event to ui component.
55      * @param [in] data data received from hardware
56      */
57     virtual void DispatchEvent(const DeviceData& data) = 0;
58 };
59 } // namespace OHOS
60 #endif // GRAPHIC_LITE_INPUT_DEVICE_H
61