ext 树状结构中父子节点的管理选择

//添加监听 设置树的节点选择的级联关系
var listenerCheck = function(node, checked) {
    childHasChecked(node,checked);
    var parentNode = node.parentNode;
    if(parentNode != null) {
    parentCheck(parentNode,checked);
}
};
//级联选中父节点
var parentCheck = function(node ,checked){
    var childNodes = node.childNodes;
    for (var i = 0; i < childNodes.length; i++) {
        if (childNodes[i].get('checked')) {
            node.set('checked',checked);
            continue;
        }else{
            node.set('checked',false);
            break;
    }
};
var parentNode = node.parentNode;
    if (parentNode != null ) {
        parentCheck(parentNode,checked);
    }
}
//级联选择子节点
var childHasChecked = function (node, checked) {
    node.cascadeBy(function (child) {
        child.set("checked",checked)
    });
}