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xizhang/ads2019-pinch-to-zoom.kt

Created February 21, 2020 19:50
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ads2019-pinch-to-zoom.kt
val scaleDetector = ScaleGestureDetector(context, listener)
override fun onTouchEvent(event: MotionEvent) : Boolean {
// Let the ScaleGestureDetector inspect all events
scaleDetector.onTouchEvent(event)
return true
}
val listener = object : ScaleGestureDetector.SimpleOnScaleGestureListener() {
override fun onScale(detector: ScaleGestureDetector): Boolean {
val scale = cameraControl.getZoomRatio.getValue() * detector.getScaleFactor()
}
}
@shanklesh
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Where to add this snipet ?

@xizhang
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xizhang commented Dec 12, 2020 •
edited

You can take a look at the source code of PreviewView and see how it handles the scale gesture.

@shanklesh
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shanklesh commented Dec 12, 2020 via email

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