adapter/src/main/kotlin/ca/allanwang/kau/animators/DefaultAnimator.kt


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package ca.allanwang.kau.animators

import android.support.v7.widget.RecyclerView
import android.view.ViewPropertyAnimator

/**
 * Created by Allan Wang on 2017-06-27.
 */
open class DefaultAnimator : BaseItemAnimator() {

    override fun removeAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
        return holder.itemView.animate().apply {
            alpha(0f)
            duration = this@DefaultAnimator.removeDuration
            interpolator = this@DefaultAnimator.interpolator
        }
    }

    override fun removeAnimationCleanup(holder: RecyclerView.ViewHolder) {
        holder.itemView.alpha = 1f
    }

    override fun addAnimationPrepare(holder: RecyclerView.ViewHolder) {
        holder.itemView.alpha = 0f
    }

    override fun addAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
        return holder.itemView.animate().apply {
            alpha(1f)
            duration = this@DefaultAnimator.addDuration
            interpolator = this@DefaultAnimator.interpolator
        }
    }

    override fun addAnimationCleanup(holder: RecyclerView.ViewHolder) {
        holder.itemView.alpha = 1f
    }

    override fun changeOldAnimation(holder: RecyclerView.ViewHolder, changeInfo: ChangeInfo): ViewPropertyAnimator {
        return holder.itemView.animate().apply {
            alpha(0f)
            translationX(changeInfo.toX.toFloat() - changeInfo.fromX)
            translationY(changeInfo.toY.toFloat() - changeInfo.fromY)
            duration = this@DefaultAnimator.changeDuration
            interpolator = this@DefaultAnimator.interpolator
        }
    }

    override fun changeNewAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
        return holder.itemView.animate().apply {
            alpha(1f)
            translationX(0f)
            translationY(0f)
            duration = this@DefaultAnimator.changeDuration
            interpolator = this@DefaultAnimator.interpolator
        }
    }

    override fun changeAnimationCleanup(holder: RecyclerView.ViewHolder) {
        holder.itemView.alpha = 1f
    }

}