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+<div class="apiDetail">
+<div>
+	<h2><span>Function(event, treeId, treeNodes)</span><span class="path">setting.callback.</span>onDrag</h2>
+	<h3>概述<span class="h3_info">[ 依赖 <span class="highlight_green">jquery.ztree.exedit</span> 扩展 js ]</span></h3>
+	<div class="desc">
+		<p></p>
+		<div class="longdesc">
+			<p>用于捕获节点被拖拽的事件回调函数</p>
+			<p class="highlight_red">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。</p>
+			<p>默认值：null</p>
+		</div>
+	</div>
+	<h3>Function 参数说明</h3>
+	<div class="desc">
+	<h4><b>event</b><span>js event 对象</span></h4>
+	<p>标准的 js event 对象</p>
+	<h4 class="topLine"><b>treeId</b><span>String</span></h4>
+	<p>被拖拽的节点 treeNodes 所在 zTree 的 <b class="highlight_red">treeId</b>，便于用户操控</p>
+	<h4 class="topLine"><b>treeNodes</b><span>Array(JSON)</span></h4>
+	<p>要被拖拽的节点 JSON 数据集合</p>
+	</div>
+	<h3>setting & function 举例</h3>
+	<h4>1. 每次开始进行拖拽节点后， 弹出被拖拽节点的个数信息</h4>
+	<pre xmlns=""><code>function zTreeOnDrag(event, treeId, treeNodes) {
+    alert(treeNodes.length);
+};
+var setting = {
+	callback: {
+		onDrag: zTreeOnDrag
+	}
+};
+......</code></pre>
+</div>
+</div>
+\ No newline at end of file