var data = [{
"id": 1,
"checked":true,
"text": "系统菜单",
"children": [{
"id": 11,
"text": "用户管理",
"checked":true,
"children": [{
"id": 19,
"text": "增加用户"
}, {
"id": 3,
"text": "修改用户"
}, {
"id": 5,
"text": "删除用户",
"checked":true
}]
}, {
"id": 12,
"text": "角色管理",
"children": [{
"id": 13,
"text": "增加角色",
"checked":true
}, {
"id": 3,
"text": "修改角色"
}, {
"id": 5,
"text": "删除角色"
}]
}]
}, {
"id": 2,
"text": "其他",
"state": "closed"
}];
$(function () {
$("#tt").tree({
data: data,
checkbox: true,
cascadeCheck: false,
onCheck: function (node, checked) {
if (checked) {
var parentNode = $("#tt").tree('getParent', node.target);
if (parentNode != null) {
$("#tt").tree('check', parentNode.target);
}
} else {
var childNode = $("#tt").tree('getChildren', node.target);
if (childNode.length > 0) {
for (var i = 0; i < childNode.length; i++) {
$("#tt").tree('uncheck', childNode[i].target);
}
}
}
}
});
});
function getChecked()
{
var arr = [];
var checkeds = $('#tt').tree('getChecked', 'checked');
for (var i = 0; i < checkeds.length; i++) {
arr.push(checkeds[i].id);
}
alert(arr.join(','));
}
<ul id="tt"></ul>
<input type="button" value="获取选中" onclick="getChecked()" />
但是有时候我们从后台返回list,
然后将list转换成一个Tree. easyui根据这个数据生成一个树.
那么如何将list转换成一棵树的基本代码就要查看上面一片博客了(http://www.cnblogs.com/guoyansi19900907/p/4701746.html)
现在给出从数据库获取数据,根据指定数据来控制树的选中和未选中状态.
下面这段代码是将list的数据转换成tree,并且加入checked=true或false来控制选中,未选中.
/**
* checkbox 树
* @param rows
* @param param
* @returns {Array}
*/
function convertCheckbox(rows,param){
/*for(var gys=0;gys<rows.length;gys++){
console.log(rows[gys]["if_fuquan"]);
}*/
function getTreeCheck(n){
if(n==1){
return true;
}else{
return false;
}
} function exists(rows, parentId){
for(var i=0; i<rows.length; i++){
if (rows[i][param.id] == parentId) return true;
}
return false;
} var nodes = [];
// 获取*的node
for(var i=0; i<rows.length; i++){
var row = rows[i];
if (!exists(rows, row[param.parentId])){ //gys 给顶层添加链接
var topNode={id:row[param.id],text:row[param.name],checked:getTreeCheck(row[param.checked])};
nodes.push(topNode); // nodes.push({
//id:row.id,
//text:row.name
//});
}
} var toDo = [];
for(var i=0; i<nodes.length; i++){
toDo.push(nodes[i]);
}
while(toDo.length){//循环toDo当toDo长度为零时停止
var node = toDo.shift();//删除第一个元素,然后返回第一个元素,改变数组长度
// 获取子节点
for(var i=0; i<rows.length; i++){
var row = rows[i];
if (row[param.parentId] == node.id){
var child = {id:row[param.id],text:row[param.name]};
// gys 添加链接 //if(row[param.checked]){
//alert(row[param.checked]);
child.checked=getTreeCheck(row[param.checked]);
//}
if (node.children){
node.children.push(child);
} else {
node.children = [child];
}
toDo.push(child);
}
}
}
return nodes;
}
var objTree= $("#fuquanTree");
objTree.tree({
url:"data.json",
method: 'get',
checkbox:true,
cascadeCheck: false,
loadFilter:function(data){//这里的privilege_id,privilege_name,if_fuquan,parent_privilege_id对应的都是数据库的字段.
return convertCheckbox(data,{id:"privilege_id",name:"privilege_name",checked:"if_fuquan",parentId:"parent_privilege_id"});
},
onCheck: function (node, checked) {
if (checked) {
var parentNode =objTree.tree('getParent', node.target);
if (parentNode != null) {//选中子集时,父级没选中就选中父级
objTree.tree('check', parentNode.target);
}
} else {//取消选中,如果有子集就取消选中子集
var childNode = objTree.tree('getChildren', node.target);
if (childNode.length > 0) {
for (var i = 0; i < childNode.length; i++) {
objTree.tree('uncheck', childNode[i].target);
}
}
}
}
});