private const val MAX_SCALE = 1.0f

private const val MIN_SCALE = 0.8f

class ZoomOutSlideTransformer : ViewPager.PageTransformer {

    override fun transformPage(page: View, pos: Float) {
        val position = when {
            pos < -1 -> -1f
            pos > 1 -> 1f
            else -> pos
        }

        val tempScale = if (position < 0) 1 + position else 1 - position

        val slope = (MAX_SCALE - MIN_SCALE) / 1
        val scaleValue = MIN_SCALE + tempScale * slope
        page.scaleX = scaleValue
        page.scaleY = scaleValue
    }
}