1 files changed, 45 insertions, 0 deletions
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/animators/BaseDelayAnimator.kt b/adapter/src/main/kotlin/ca/allanwang/kau/animators/BaseDelayAnimator.kt
new file mode 100644
index 0000000..c649376
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/animators/BaseDelayAnimator.kt
@@ -0,0 +1,45 @@
+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)
+}
+\ No newline at end of file