Android PageTransformer KOTLIN to use with ViewPager

ParallaxPageTransformer.kt

//Use like: vPager.setPageTransformer(true, ParallaxPageTransformer)

class ParallaxPageTransformer : ViewPager.PageTransformer {

    override fun transformPage(view: View, position: Float) {
        val pageWidth = view.width
        when {
            position < -1 -> view.alpha = 1f
            position <= 1 -> dummyImageView.setTranslationX(-position * (pageWidth / 2)) //Half the normal speed
            else -> view.alpha = 1f
        }
    }
}

ViewPagerAnimations.kt

fun transformPage(view: View, position: Float) {
    val pageWidth = view.getWidth()

    if (position < -1) { // [-Infinity,-1)
        // This page is way off-screen to the left.
        view.setAlpha(0)

    } else if (position <= 1) { // [-1,1]


        mBlur.setTranslationX(((-(1 - position)).toDouble() * 0.5 * pageWidth.toDouble()).toFloat())
        mBlurLabel.setTranslationX(((-(1 - position)).toDouble() * 0.5 * pageWidth.toDouble()).toFloat())

        mDim.setTranslationX((-(1 - position) * pageWidth).toFloat())
        mDimLabel.setTranslationX((-(1 - position) * pageWidth).toFloat())

        mCheck.setTranslationX(((-(1 - position)).toDouble() * 1.5 * pageWidth.toDouble()).toFloat())
        mDoneButton.setTranslationX(((-(1 - position)).toDouble() * 1.7 * pageWidth.toDouble()).toFloat())
        // The 0.5, 1.5, 1.7 values you see here are what makes the view move in a different speed.
        // The bigger the number, the faster the view will translate.
        // The result float is preceded by a minus because the views travel in the opposite direction of the movement.

        mFirstColor.setTranslationX(position * (pageWidth / 4))

        mSecondColor.setTranslationX(position * (pageWidth / 1))

        mTint.setTranslationX(position * (pageWidth / 2))

        mDesaturate.setTranslationX(position * (pageWidth / 1))
        // This is another way to do it


    } else { // (1,+Infinity]
        // This page is way off-screen to the right.
        view.setAlpha(0)
    }
}