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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.
*
* Base for delayed animators
* item delay factor by default can be 0.125f
*/
abstract class BaseDelayAnimator(val itemDelayFactor: Float) : DefaultAnimator() {
override abstract fun addAnimationPrepare(holder: RecyclerView.ViewHolder)
override fun addAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
return holder.itemView.animate().apply {
startDelay = Math.max(0L, (holder.adapterPosition * addDuration * itemDelayFactor).toLong())
duration = this@BaseDelayAnimator.addDuration
interpolator = this@BaseDelayAnimator.interpolator
}
}
override abstract fun addAnimationCleanup(holder: RecyclerView.ViewHolder)
override fun getAddDelay(remove: Long, move: Long, change: Long): Long = 0
override fun getRemoveDelay(remove: Long, move: Long, change: Long): Long = 0
/**
* Partial removal animation
* As of now, all it does it change the alpha
* To have it slide, add onto it in a sub class
*/
override fun removeAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
return holder.itemView.animate().apply {
duration = this@BaseDelayAnimator.removeDuration
startDelay = Math.max(0L, (holder.adapterPosition * removeDuration * itemDelayFactor).toLong())
interpolator = this@BaseDelayAnimator.interpolator
}
}
override abstract fun removeAnimationCleanup(holder: RecyclerView.ViewHolder)
}
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