Drag Events

1. Events.Move — The layer is moving. 译：层正在移动。
2. Events.DragStart — Start of drag. 译：拖动开始
3. Events.Drag — While dragging. 译：当在拖
4. Events.DragEnd — End of drag. 译：拖动结束
5. Events.DragAnimationStart — Did start momentum/bounce animation. 译：开始拖动的动画
6. Events.DragAnimationEnd — Did end momentum/bounce animation. 译：拖动结束的动画
7. Events.DirectionLockStart — Did start lock direction. 译：开始锁定方向。

layerA = new Layer
layerA.draggable.enabled = true

# Returns the offset (x, y), layer.draggable and the layer 
layerA.on Events.Move, (offset, draggable, layer) ->
    print offset, draggable, layer

layerA = new Layer
layerA.draggable.enabled = true

＃Returns the event, layer.draggable and the layer 
layerA.on Events.DragStart, (event, draggable, layer) ->
    print event, draggable, layer

Drag Event Shortcuts
译：拖动事件的快捷键

＃For Events.Move 
layerA.onMove ->
    print "Moving"

＃for Events.DragStart 
layerA.onDragStart ->
    print "Start of drag"

# For Events.Drag     
layerA.onDrag ->
    print "Dragging"

# For Events.DragEnd     
layerA.onDragEnd ->
    print "End of drag"

# For Events.DragAnimationStart     
layerA.onDragAnimationStart ->
    print "Start of drag animation"

# For Events.DragAnimationEnd     
layerA.onDragAnimationEnd ->
    print "End of drag animation"

# For Events.DirectionLockStart     
layerA.onDirectionLockStart ->
    print "Start of direction lock"