鸿蒙OpenHarmony Native API【Native XComponent】

Native XComponent

Overview

Description:

Describes the surface and touch event held by the ArkUI XComponent, which can be used for the EGL/OpenGLES and media data input and displayed on the ArkUI XComponent.

Since:

8

Version:

1.0

Summary

Files

File Name	Description
[native_interface_xcomponent.h]	Declares APIs for accessing a Native XComponent.

Classes

Classe Name	Description
[OH_NativeXComponent_TouchPoint]
[OH_NativeXComponent_TouchEvent]
[OH_NativeXComponent_Callback]	Registers the surface lifecycle and touch event callbacks.

Macros

Macro Name and Value	Description
OH_NATIVE_XCOMPONENT_OBJ ("NATIVE_XCOMPONENT_OBJ")

Typedefs

Typedef Name	Description
OH_NativeXComponent	typedef struct OH_NativeXComponent Provides an encapsulated OH_NativeXComponent instance.
OH_NativeXComponent_Callback	typedef struct OH_NativeXComponent_Callback Registers the surface lifecycle and touch event callbacks.

Enumerations

Enumeration Name	Description
{ OH_NATIVEXCOMPONENT_RESULT_SUCCESS = 0, OH_NATIVEXCOMPONENT_RESULT_FAILED = -1, OH_NATIVEXCOMPONENT_RESULT_BAD_PARAMETER = -2 }	Enumerates the API access states.
OH_NativeXComponent_TouchEventType { OH_NATIVEXCOMPONENT_DOWN = 0, OH_NATIVEXCOMPONENT_UP, OH_NATIVEXCOMPONENT_MOVE, OH_NATIVEXCOMPONENT_CANCEL, OH_NATIVEXCOMPONENT_UNKNOWN }

Functions

Function	Description
OH_NativeXComponent_GetXComponentId (OH_NativeXComponent *component, char *id, uint64_t *size)	int32_t Obtains the ID of the ArkUI XComponent.
OH_NativeXComponent_GetXComponentSize (OH_NativeXComponent *component, const void *window, uint64_t *width, uint64_t *height)	int32_t Obtains the size of the surface held by the ArkUI XComponent.
OH_NativeXComponent_GetXComponentOffset (OH_NativeXComponent *component, const void *window, double *x, double *y)	int32_t Obtains the offset of the surface held by the ArkUI XComponent.
OH_NativeXComponent_GetTouchEvent (OH_NativeXComponent *component, const void *window, OH_NativeXComponent_TouchEvent *touchEvent)	int32_t Obtains the touch event dispatched by the ArkUI XComponent.
OH_NativeXComponent_RegisterCallback (OH_NativeXComponent *component, OH_NativeXComponent_Callback *callback)	int32_t Registers a callback for this OH_NativeXComponent instance.

Details

Typedef

OH_NativeXComponent

typedef struct OH_NativeXComponent OH_NativeXComponent

Description:

Provides an encapsulated OH_NativeXComponent instance.

OH_NativeXComponent_Callback

typedef struct OH_NativeXComponent_Callback OH_NativeXComponent_Callback

Description:

Registers the surface lifecycle and touch event callbacks.

Enumeration Type

anonymous enum

anonymous enum

Description:

Enumerates the API access states.

Enumerator	Description
OH_NATIVEXCOMPONENT_RESULT_SUCCESS	Success result.
OH_NATIVEXCOMPONENT_RESULT_FAILED	Failed result.
OH_NATIVEXCOMPONENT_RESULT_BAD_PARAMETER	Invalid parameters.

OH_NativeXComponent_TouchEventType

enum OH_NativeXComponent_TouchEventType

Enumerator	Description
OH_NATIVEXCOMPONENT_DOWN	Trigger a touch event when a finger is pressed.
OH_NATIVEXCOMPONENT_UP	Trigger a touch event when a finger is lifted.
OH_NATIVEXCOMPONENT_MOVE	Trigger a touch event when a finger moves on the screen in pressed state.
OH_NATIVEXCOMPONENT_CANCEL	Trigger an event when a touch event is canceled.
OH_NATIVEXCOMPONENT_UNKNOWN	Invalid touch type.

Function

OH_NativeXComponent_GetTouchEvent()

int32_t OH_NativeXComponent_GetTouchEvent (OH_NativeXComponent * component, const void * window, OH_NativeXComponent_TouchEvent * touchEvent )

Description:

Obtains the touch event dispatched by the ArkUI XComponent.

Parameters:

Name	Description
component	Indicates the pointer to this OH_NativeXComponent instance.
window	Indicates the native window handler.
touchEvent	Indicates the pointer to the current touch event.

Returns:

Returns the status code of the execution.

OH_NativeXComponent_GetXComponentId()

int32_t OH_NativeXComponent_GetXComponentId (OH_NativeXComponent * component, char * id, uint64_t * size )

Description:

Obtains the ID of the ArkUI XComponent.

Parameters:

Name	Description
component	Indicates the pointer to this OH_NativeXComponent instance.
id	Indicates the char buffer to keep the ID of this OH_NativeXComponent instance. Note that a null-terminator will be appended to the char buffer, so the size of the char buffer should be at least as large as the size of the real id length plus 1. It is recommended that the size of the char buffer be [OH_XCOMPONENT_ID_LEN_MAX + 1].
size	Indicates the pointer to the length of id, which you can set and receive.

Returns:

Returns the status code of the execution.

OH_NativeXComponent_GetXComponentOffset()

int32_t OH_NativeXComponent_GetXComponentOffset (OH_NativeXComponent * component, const void * window, double * x, double * y )

Description:

Obtains the offset of the surface held by the ArkUI XComponent.

Parameters:

Name	Description
component	Indicates the pointer to this OH_NativeXComponent instance.
window	Indicates the native window handler.
x	Indicates the pointer to the x coordinate of the current surface.
y	Indicates the pointer to the y coordinate of the current surface.

Returns:

Returns the status code of the execution.

OH_NativeXComponent_GetXComponentSize()

int32_t OH_NativeXComponent_GetXComponentSize (OH_NativeXComponent * component, const void * window, uint64_t * width, uint64_t * height )

Description:

Obtains the size of the surface held by the ArkUI XComponent.

Parameters:

Name	Description
component	Indicates the pointer to this OH_NativeXComponent instance.
window	Indicates the native window handler.
width	Indicates the pointer to the width of the current surface.
height	Indicates the pointer to the height of the current surface.

Returns:

Returns the status code of the execution.

OH_NativeXComponent_RegisterCallback()

int32_t OH_NativeXComponent_RegisterCallback (OH_NativeXComponent * component, OH_NativeXComponent_Callback * callback )

Description:

Registers a callback for this OH_NativeXComponent instance.

Parameters:

Name	Description
component	Indicates the pointer to this OH_NativeXComponent instance.
callback	Indicates the pointer to a surface lifecycle and touch event callback.

Returns:

Returns the status code of the execution.

Variable

deviceId

int64_t OH_NativeXComponent_TouchEvent::deviceId = 0

Description:

ID of the device where the current touch event is generated.

DispatchTouchEvent

void(* OH_NativeXComponent_Callback::DispatchTouchEvent) (OH_NativeXComponent *component, void *window)

Description:

Called when a touch event is triggered.

force [1/2]

float OH_NativeXComponent_TouchPoint::force = 0.0

Description:

Pressure of the current touch event.

force [2/2]

float OH_NativeXComponent_TouchEvent::force = 0.0

Description:

Pressure of the current touch event.

id [1/2]

int32_t OH_NativeXComponent_TouchPoint::id = 0

Description:

Unique identifier of a finger.

id [2/2]

int32_t OH_NativeXComponent_TouchEvent::id = 0

Description:

Unique identifier of a finger.

isPressed

bool OH_NativeXComponent_TouchPoint::isPressed = false

Description:

Whether the current point is pressed.

numPoints

uint32_t OH_NativeXComponent_TouchEvent::numPoints = 0

Description:

Number of current touch points.

OnSurfaceChanged

void(* OH_NativeXComponent_Callback::OnSurfaceChanged) (OH_NativeXComponent *component, void *window)

Description:

Called when the surface is changed. This API is defined but not implemented in OpenHarmony 3.1 Release. It will be available for use in OpenHarmony 3.1 MR.

OnSurfaceCreated

void(* OH_NativeXComponent_Callback::OnSurfaceCreated) (OH_NativeXComponent *component, void *window)

Description:

Called when the surface is created.

OnSurfaceDestroyed

void(* OH_NativeXComponent_Callback::OnSurfaceDestroyed) (OH_NativeXComponent *component, void *window)

Description:

Called when the surface is destroyed.

screenX [1/2]

float OH_NativeXComponent_TouchPoint::screenX = 0.0

Description:

X coordinate of the touch point relative to the left edge of the screen.

screenX [2/2]

float OH_NativeXComponent_TouchEvent::screenX = 0.0

Description:

X coordinate of the touch point relative to the left edge of the screen.

screenY [1/2]

float OH_NativeXComponent_TouchPoint::screenY = 0.0

Description:

Y coordinate of the touch point relative to the upper edge of the screen.

screenY [2/2]

float OH_NativeXComponent_TouchEvent::screenY = 0.0

Description:

Y coordinate of the touch point relative to the upper edge of the screen.

size [1/2]

double OH_NativeXComponent_TouchPoint::size = 0.0

Description:

Contact area between the finger pad and the screen.

size [2/2]

double OH_NativeXComponent_TouchEvent::size = 0.0

Description:

Contact area between the finger pad and the screen.

timeStamp [1/2]

long long OH_NativeXComponent_TouchPoint::timeStamp = 0

Description:

Timestamp of the current touch event.

timeStamp [2/2]

long long OH_NativeXComponent_TouchEvent::timeStamp = 0

Description:

Timestamp of the current touch event.

touchPoints

OH_NativeXComponent_TouchPoint OH_NativeXComponent_TouchEvent::touchPoints[OH_MAX_TOUCH_POINTS_NUMBER]

Description:

Array of the current touch points.

type [1/2]

OH_NativeXComponent_TouchEventType OH_NativeXComponent_TouchPoint::type = OH_NativeXComponent_TouchEventType::OH_NATIVEXCOMPONENT_UNKNOWN

Description:

Touch type of the touch event.

type [2/2]

OH_NativeXComponent_TouchEventType OH_NativeXComponent_TouchEvent::type = OH_NativeXComponent_TouchEventType::OH_NATIVEXCOMPONENT_UNKNOWN

Description:

Touch type of the touch event.

x [1/2]

float OH_NativeXComponent_TouchPoint::x = 0.0

Description:

X coordinate of the touch point relative to the left edge of the element to touch.

x [2/2]

float OH_NativeXComponent_TouchEvent::x = 0.0

Description:

X coordinate of the touch point relative to the left edge of the element to touch.

y [1/2]

float OH_NativeXComponent_TouchPoint::y = 0.0

Description:

Y coordinate of the touch point relative to the upper edge of the element to touch.

y [2/2]

float OH_NativeXComponent_TouchEvent::y = 0.0

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Description:

Y coordinate of the touch point relative to the upper edge of the element to touch.