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VerticalScrollViewHelper.kt
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VerticalScrollViewHelper.kt
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package com.hieupt.android.standalonescrollbar.viewhelper
import com.hieupt.android.standalonescrollbar.ScrollableView
import com.hieupt.android.standalonescrollbar.VerticalScrollableView
import com.hieupt.android.standalonescrollbar.view.ScrollView2
/**
* Created by HieuPT on 12/8/2020.
*/
internal class VerticalScrollViewHelper(
private val scrollView: ScrollView2
) : VerticalScrollableView {
override val viewWidth: Int
get() = scrollView.width
override val viewHeight: Int
get() = scrollView.height
override val scrollRange: Int
get() = scrollView.calculateVerticalScrollRange() + scrollView.paddingTop + scrollView.paddingBottom
override val scrollOffset: Int
get() = scrollView.calculateVerticalScrollOffset()
override fun addOnScrollChangedListener(onScrollChanged: (caller: ScrollableView) -> Unit) {
scrollView.addOnScrollListener { _, _, _, _ ->
onScrollChanged(this)
}
}
override fun addOnDraw(onDraw: (caller: ScrollableView) -> Unit) {
scrollView.addOnDrawListener {
onDraw(this)
}
}
override fun scrollTo(offset: Int) {
scrollView.scrollTo(scrollView.scrollX, offset)
}
}