openo-portal/portal-common/src/main/webapp/common/thirdparty/zTree/api/cn/setting.callback.beforeDrag.html

   1 <div class="apiDetail">\r
   2 <div>\r
   3         <h2><span>Function(treeId, treeNodes)</span><span class="path">setting.callback.</span>beforeDrag</h2>\r
   4         <h3>概述<span class="h3_info">[ 依赖 <span class="highlight_green">jquery.ztree.exedit</span> 扩展 js ]</span></h3>\r
   5         <div class="desc">\r
   6                 <p></p>\r
   7                 <div class="longdesc">\r
   8                         <p>用于捕获节点被拖拽之前的事件回调函数，并且根据返回值确定是否允许开启拖拽操作</p>\r
   9                         <p>默认值：null</p>\r
  10                 </div>\r
  11         </div>\r
  12         <h3>Function 参数说明</h3>\r
  13         <div class="desc">\r
  14         <h4><b>treeId</b><span>String</span></h4>\r
  15         <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>\r
  16         <h4 class="topLine"><b>treeNodes</b><span>Array(JSON)</span></h4>\r
  17         <p>要被拖拽的节点 JSON 数据集合</p>\r
  18         <p class="highlight_red">v3.x 允许多个同级节点同时被拖拽，因此将此参数修改为 Array(JSON)</p>\r
  19         <p class="highlight_red">如果拖拽时多个被选择的节点不是同级关系，则只能拖拽鼠标当前所在位置的节点</p>\r
  20         <h4 class="topLine"><b>返回值</b><span>Boolean</span></h4>\r
  21         <p>返回值是 true / false</p>\r
  22         <p class="highlight_red">如果返回 false，zTree 将终止拖拽，也无法触发 onDrag / beforeDrop / onDrop 事件回调函数</p>\r
  23         </div>\r
  24         <h3>setting & function 举例</h3>\r
  25         <h4>1. 禁止全部拖拽操作</h4>\r
  26         <pre xmlns=""><code>function zTreeBeforeDrag(treeId, treeNodes) {\r
  27     return false;\r
  28 };\r
  29 var setting = {\r
  30         edit: {\r
  31                 enable: true\r
  32         },\r
  33         callback: {\r
  34                 beforeDrag: zTreeBeforeDrag\r
  35         }\r
  36 };\r
  37 ......</code></pre>\r
  38 </div>\r
  39 </div>