layer.draggable.isAnimating

Whether the layer is currently being animated by a momentum or bounce animation. (Read-only)
译：该层是否是当前动画的动量或反弹动画。（只读）

layerA = new Layer
layerA.draggable.enabled = true

# Check if the layer is animating 
layerA.on Events.DragMove, ->
    print layerA.draggable.isAnimating