46 lines
1.2 KiB
Kotlin
46 lines
1.2 KiB
Kotlin
|
package code.name.monkey.retromusic.transform
|
||
|
|
||
|
import android.annotation.TargetApi
|
||
|
import android.os.Build
|
||
|
import android.util.Log
|
||
|
import android.view.View
|
||
|
import androidx.viewpager.widget.ViewPager
|
||
|
|
||
|
/**
|
||
|
* Created by xgc1986 on 2/Apr/2016
|
||
|
*/
|
||
|
|
||
|
class ParallaxPagerTransformer(private val id: Int) : ViewPager.PageTransformer {
|
||
|
private var border = 0
|
||
|
private var speed = 0.2f
|
||
|
|
||
|
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
|
||
|
override fun transformPage(view: View, position: Float) {
|
||
|
|
||
|
val parallaxView = view.findViewById<View>(id)
|
||
|
|
||
|
if (parallaxView != null) {
|
||
|
if (position > -1 && position < 1) {
|
||
|
val width = parallaxView.width.toFloat()
|
||
|
parallaxView.translationX = -(position * width * speed)
|
||
|
val sc = (view.width.toFloat() - border) / view.width
|
||
|
if (position == 0f) {
|
||
|
view.scaleX = 1f
|
||
|
view.scaleY = 1f
|
||
|
} else {
|
||
|
view.scaleX = sc
|
||
|
view.scaleY = sc
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
fun setBorder(px: Int) {
|
||
|
border = px
|
||
|
}
|
||
|
|
||
|
fun setSpeed(speed: Float) {
|
||
|
this.speed = speed
|
||
|
}
|
||
|
}
|