59 lines
1.7 KiB
Kotlin
59 lines
1.7 KiB
Kotlin
/*
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* Copyright (c) 2019 Hemanth Savarala.
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*
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* Licensed under the GNU General Public License v3
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*
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* This is free software: you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by
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* the Free Software Foundation either version 3 of the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*/
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package code.name.monkey.retromusic.transform
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import android.annotation.TargetApi
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import android.os.Build
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import android.view.View
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import androidx.viewpager.widget.ViewPager
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/**
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* Created by xgc1986 on 2/Apr/2016
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*/
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class ParallaxPagerTransformer(private val id: Int) : ViewPager.PageTransformer {
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private var border = 0
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private var speed = 0.2f
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@TargetApi(Build.VERSION_CODES.HONEYCOMB)
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override fun transformPage(view: View, position: Float) {
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val parallaxView = view.findViewById<View>(id)
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if (parallaxView != null) {
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if (position > -1 && position < 1) {
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val width = parallaxView.width.toFloat()
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parallaxView.translationX = -(position * width * speed)
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val sc = (view.width.toFloat() - border) / view.width
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if (position == 0f) {
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view.scaleX = 1f
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view.scaleY = 1f
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} else {
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view.scaleX = sc
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view.scaleY = sc
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}
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}
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}
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}
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fun setBorder(px: Int) {
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border = px
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}
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fun setSpeed(speed: Float) {
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this.speed = speed
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}
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}
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