用于捕获节点被拖拽的事件回调函数
-如果设置了 setting.callback.beforeDrag 方法，且返回 false，将无法触发 onDrag 事件回调函数。
+如果设置了 setting.callback.beforeDrag 方法，且返回 false，将无法触发 onDragMove 和 onDrag 事件回调函数。
默认值：null
用于捕获节点被拖拽过程中移动的事件回调函数
+主要用于捕获 zTree 节点拖拽到的 DOM，从而操作对应的 DOM。
+默认值：null
+标准的 js event 对象
+被拖拽的节点 treeNodes 所在 zTree 的 treeId，便于用户操控
+要被拖拽的节点 JSON 数据集合
+function zTreeOnDragMove(event, treeId, treeNodes) {
+ console.log(event.target);
+};
+var setting = {
+ callback: {
+ onDragMove: zTreeOnDragMove
+ }
+};
+......Used to capture the drag event when drag node.
-If you set 'setting.callback.beforeDrag',and return false, zTree will stop drag, and will not trigger the 'onDrag' callback.
+If you set 'setting.callback.beforeDrag',and return false, zTree will stop drag, and will not trigger the 'onDragMove' & 'onDrag' callback.
Default: null
Used to capture the drag-move event when drag & drop node.
+Mainly used to capture the DOM which the nodes was drag in.
+Default: null
+event Object
+zTree unique identifier: treeId, the tree is what the treeNodes are belong to, easy for users to control.
+A collection of the nodes which will be dragged
+function zTreeOnDragMove(event, treeId, treeNodes) {
+ console.log(event.target);
+};
+var setting = {
+ callback: {
+ onDragMove: zTreeOnDragMove
+ }
+};
+......