InputReporter.md

# InputReporter
## **Overview**
**Related Modules:**
[Input](Input.md)
**Description:**
Provides interfaces for reporting event data of input devices.
The interfaces include the callback for reporting the input event data and the functions for obtaining the data in polling mode.
## **Summary**
## Data Fields

Variable Name	Description
RegisterReportCallback )(uint32_t devIndex, InputReportEventCb *callback)	int32_t(*  Registers a callback for reporting subscribed data of specified input devices.
UnregisterReportCallback )(uint32_t devIndex)	int32_t(*  Unregisters the callback for reporting subscribed data of specified input devices.
GetInputEvent )(uint32_t devIndex, InputEventData *eventData)	int32_t(*  Gets the input event data.

## **Details**
## **Field Documentation**
## GetInputEvent
```
int32_t(* InputReporter::GetInputEvent) (uint32_t devIndex, [InputEventData](InputEventData.md) *eventData)
```
**Description:**
Gets the input event data.
This function enables the input service to proactively obtain the input event data in polling mode.
**Parameters:**

Name	Description
devIndex	Indicates the index of an input device. A maximum of 32 input devices are supported. The value ranges from 0 to 31, and value 0 represents the first input device.
eventData	Indicates the pointer to the input event data reported by the input driver.

**Returns:**
Returns **0** if the operation is successful; returns an error code defined in [RetStatus](Input.md#ga85d58a5185669daa4995e332b63eba7a) otherwise.
## RegisterReportCallback
```
int32_t(* InputReporter::RegisterReportCallback) (uint32_t devIndex, [InputReportEventCb](InputReportEventCb.md) *callback)
```
**Description:**
Registers a callback for reporting subscribed data of specified input devices.
After this callback is successfully registered, the driver can report the input event data to the input service through this callback.
**Parameters:**

Name	Description
devIndex	Indicates the index of an input device. A maximum of 32 input devices are supported. The value ranges from 0 to 31, and value 0 represents the first input device.
callback	Indicates the pointer to the callback to register.

**Returns:**
Returns **0** if the operation is successful; returns an error code defined in [RetStatus](Input.md#ga85d58a5185669daa4995e332b63eba7a) otherwise.
## UnregisterReportCallback
```
int32_t(* InputReporter::UnregisterReportCallback) (uint32_t devIndex)
```
**Description:**
Unregisters the callback for reporting subscribed data of specified input devices.
**Parameters:**

Name	Description
devIndex	Indicates the index of an input device. A maximum of 32 input devices are supported. The value ranges from 0 to 31, and value 0 represents the first input device.

**Returns:**
Returns **0** if the operation is successful; returns an error code defined in [RetStatus](Input.md#ga85d58a5185669daa4995e332b63eba7a) otherwise.