46 lines
1.6 KiB
Kotlin
46 lines
1.6 KiB
Kotlin
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package code.name.monkey.retromusic
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import android.content.Context
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import android.util.AttributeSet
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import android.view.ViewGroup
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import androidx.recyclerview.widget.LinearLayoutManager
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import androidx.recyclerview.widget.RecyclerView
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class PeekingLinearLayoutManager : LinearLayoutManager {
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@JvmOverloads
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constructor(
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context: Context?,
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@RecyclerView.Orientation orientation: Int = RecyclerView.VERTICAL,
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reverseLayout: Boolean = false
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) : super(context, orientation, reverseLayout)
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constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int, defStyleRes: Int) : super(
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context,
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attrs,
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defStyleAttr,
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defStyleRes
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)
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override fun generateDefaultLayoutParams() =
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scaledLayoutParams(super.generateDefaultLayoutParams())
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override fun generateLayoutParams(lp: ViewGroup.LayoutParams?) =
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scaledLayoutParams(super.generateLayoutParams(lp))
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override fun generateLayoutParams(c: Context?, attrs: AttributeSet?) =
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scaledLayoutParams(super.generateLayoutParams(c, attrs))
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private fun scaledLayoutParams(layoutParams: RecyclerView.LayoutParams) =
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layoutParams.apply {
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when (orientation) {
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HORIZONTAL -> width = (horizontalSpace * ratio).toInt()
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VERTICAL -> height = (verticalSpace * ratio).toInt()
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}
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}
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private val horizontalSpace get() = width - paddingStart - paddingEnd
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private val verticalSpace get() = height - paddingTop - paddingBottom
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private val ratio = 0.8f // change to 0.7f for 70%
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}
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