Package com.journeyapps.barcodescanner.camera

Class CenterCropStrategy

java.lang.Object

com.journeyapps.barcodescanner.camera.PreviewScalingStrategy

com.journeyapps.barcodescanner.camera.CenterCropStrategy

public class CenterCropStrategy
extends PreviewScalingStrategy

Scales the dimensions so that it fits entirely inside the parent.One of width or height will fit exactly. Aspect ratio is preserved.

Constructor Summary

Constructors

Constructor	Description
CenterCropStrategy()

Method Summary

Modifier and Type	Method	Description
protected float	getScore(Size size, Size desired)	Get a score for our size.
Rect	scalePreview(Size previewSize, Size viewfinderSize)	Scale the preview to cover the viewfinder, then center it.

Methods inherited from class com.journeyapps.barcodescanner.camera.PreviewScalingStrategy

getBestPreviewOrder, getBestPreviewSize

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CenterCropStrategy

public CenterCropStrategy()

Method Detail

getScore

protected float getScore(Size size,
                         Size desired)

Get a score for our size. Based on heuristics for penalizing scaling and cropping. 1.0 is perfect (exact match). 0.0 means we can't use it at all.

Overrides:

getScore in class PreviewScalingStrategy

Parameters:

size - the camera preview size (that can be scaled)

desired - the viewfinder size

Returns:

the score

scalePreview

public Rect scalePreview(Size previewSize,
                         Size viewfinderSize)

Scale the preview to cover the viewfinder, then center it. Aspect ratio is preserved.

Specified by:

scalePreview in class PreviewScalingStrategy

Parameters:

previewSize - the size of the preview (camera), in current display orientation

viewfinderSize - the size of the viewfinder (display), in current display orientation

Returns:

a rect placing the preview