PreviewViewMethods

interface PreviewViewMethods extends HybridViewMethods

Extended by

• CameraRef

Methods

convertCameraPointToViewPoint()

convertCameraPointToViewPoint(cameraPoint: Point): Point

Converts the given cameraPoint in camera sensor coordinates into a Point in view coordinates, relative to this PreviewView.

Example

const cameraPoint = { x: 0.5, y: 0.5 }
const viewPoint = previewView.convertCameraPointToViewPoint(cameraPoint)
console.log(viewPoint) // { x: 196, y: 379.5 }

convertScannedObjectCoordinatesToViewCoordinates()

convertScannedObjectCoordinatesToViewCoordinates(scannedObject: ScannedObject): ScannedObject

Returns a new ScannedObject where all coordinates in the given scannedObject are converted into view coordinates.

Parameters

scannedObject

The scanned object in its original coordinates.

convertViewPointToCameraPoint()

convertViewPointToCameraPoint(viewPoint: Point): Point

Converts the given viewPoint in view coordinates relative to this PreviewView into a Point in camera sensor coordinates.

Example

const viewPoint = { x: 196, y: 379.5 }
const cameraPoint = previewView.convertViewPointToCameraPoint(viewPoint)
console.log(cameraPoint) // { x: 0.5, y: 0.5 }

createMeteringPoint()

createMeteringPoint(
   viewX: number, 
   viewY: number, 
   size?: number): MeteringPoint

Creates a MeteringPoint that can be used for focusing AE/AF/AWB on the Camera via focusTo(...).

The coordinates (viewX, viewY) are relative to this PreviewView, and take orientation, scaling and cropping into account.

Parameters

viewX

The X coordinate within the View's coordinate system. This can be the x value of a tap event on the PreviewView.

viewY

The Y coordinate within the View's coordinate system. This can be the y value of a tap event on the PreviewView.

size

(Optional) The size of the MeteringPoint within the View's coordinate system.

takeSnapshot()

takeSnapshot(): Promise<Image>

Take a snapshot of the current PreviewView's contents, and return it as an Image.