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< div class = "apiDetail" >
< div >
< h2 > < span > Function(treeId, treeNodes)< / span > < span class = "path" > setting.callback.< / span > beforeDrag< / 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 >
< p > 默认值： < / p >
< / div >
< / div >
< h3 > Function 参数说明< / h3 >
< div class = "desc" >
< h4 > < 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 >
< 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 >
< 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 >
< h4 class = "topLine" > < b > 返回值< / b > < span > Boolean< / span > < / h4 >
< p > 返回值是 true / false< / p >
< p class = "highlight_red" > 如果返回 false， < / p >
< / div >
< h3 > setting & function 举例< / h3 >
< h4 > 1. 禁止全部拖拽操作< / h4 >
< pre xmlns = "" > < code > function zTreeBeforeDrag(treeId, treeNodes) {
return false;
};
var setting = {
edit: {
enable: true
},
callback: {
beforeDrag: zTreeBeforeDrag
}
};
......< / code > < / pre >
< / div >
< / div >
