我试图在递归树中有我的节点的唯一标题.
因此,当我给我的节点赋予标题时,它应检查该标题是否已被其他节点使用.如果采用它,它应该警告用户,它应该将该节点值重置为先前的值.
没有两个节点应该具有相同的标题.
但是这里结构是递归的,所以我不知道如何做到这一点.
注意：我想在文本框失去焦点时立即执行此操作.
var app = angular.module("myApp",[]);
app.controller("TreeController",function ($scope) {
$scope.delete = function (data) {
data.nodes = [];
};
$scope.add = function (data) {
var post = data.nodes.length + 1;
var newName = data.name + '-' + post;
data.nodes.push({ name: newName,nodes: [],selected : false,myObj: { name: newName} });
};
$scope.tree = [{ name: "Node",selected: false }];
$scope.setActive = function ($event,data) {
$event.stopPropagation();
$scope.selectedData = data;
clearDivSelection($scope.tree);
data.selected = true;
};
function clearDivSelection(items) {
items.forEach(function (item) {
item.selected = false;
if (item.nodes) {
clearDivSelection(item.nodes);
}
});
}
$scope.checkDuplicateNodeName = function () {
alert()
}
});
ul {
list-style: circle;
}
li {
margin-left: 20px;
}
.active { background-color: #ccffcc;}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<ul ng-app="myApp" ng-controller="TreeController">
<li ng-repeat="data in tree" ng-include="'tree_item_renderer.html'"></li>
<script type="text/ng-template" id="tree_item_renderer.html">
<div ng-class="{'active': data.selected}" > {{data.myObj.name}}</div>
<button ng-click="add(data)">Add node</button>
<button ng-click="delete(data)" ng-show="data.nodes.length > 0">Delete nodes</button>
<ul>
<li ng-repeat="data in data.nodes" ng-include="'tree_item_renderer.html'" ng-click="setActive($event,data)"></li>
</ul>
</script>
<div style="margin-left:100px;">
Title : <input type="text" ng-model="selectedData.myObj.name" ng-blur="checkDuplicateNodeName()" />
Location : <input type="text" ng-model="selectedData.myObj.location" />
</div>
</ul>
解决方法
我的解决方案
>在blur上存储经过验证的名称副本(意思是有3个名字,但我不知道myObj.name的点,所以我按原样保留,你可以清理)
>递归找到dupes,先停下来为true.如果有欺骗,请使用最后一个有效名称,否则更新最后一个有效名称.
个为什么
>您只想在模糊时验证名称. angular提供了通过解析器和格式化程序在每次更改时验证ng-model的方法,这将完全限制用户保持欺骗名称.有很多方法可以解决这个问题(验证器,编辑而不会持久),并且都需要不同类型的解决方案.探索并选择最适合您的方法
>使用hashMap(我的第一个想法)将需要重命名和删除的清理逻辑,这将最终使代码进一步复杂化
如果只希望在节点树中搜索dupes,则需要存储对父节点的引用,并使用getTree方法确定要搜索的根节点.
var app = angular.module("myApp",[]);
app.controller("TreeController",function($scope) {
$scope.delete = deleteNodes;
$scope.add = add;
$scope.setActive = setActive;
$scope.checkDuplicateNodeName = checkDuplicateNodeName;
$scope.trees = [{
name: "Node",selected: false
},{
name: "Node2",selected: false
}];
function deleteNodes(data) {
data.nodes = [];
}
function add(data) {
var post = data.nodes.length + 1;
var newName = data.name + '-' + post;
data.nodes.push({
name: newName,selected: false,validatedname: newName
});
}
function setActive($event,data) {
$event.stopPropagation();
if($scope.selectedData) {
$scope.selectedData.selected = false;
}
$scope.selectedData = data;
data.selected = true;
}
function checkDuplicateNodeName() {
if(!$scope.selectedData)
return;
var dupe = false;
for(var idx = 0; idx < $scope.trees.length; idx++) {
if(isDuplicateName($scope.trees[idx],$scope.selectedData)) {
dupe = true;
break;
}
}
if(dupe){
alert('The name "' + $scope.selectedData.name + '" already exists');
$scope.selectedData.name = $scope.selectedData.validatedname;
} else {
$scope.selectedData.validatedname = $scope.selectedData.name;
}
}
function getTree(node){
while(node.parent) {
node = node.parent;
}
return node;
}
function isDuplicateName(node,nodetocheck) {
var dupeName = node != nodetocheck && node.name && nodetocheck.name && node.name == nodetocheck.name;
if(dupeName) return true;
if(node.nodes){
for(var idx=0; idx< node.nodes.length; idx++) {
if(isDuplicateName(node.nodes[idx],nodetocheck)){
return true;
}
}
}
return false;
}
});
ul {
list-style: circle;
}
li {
margin-left: 20px;
}
.active {
background-color: #ccffcc;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<ul ng-app="myApp" ng-controller="TreeController">
<li ng-repeat="data in trees" ng-include="'tree_item_renderer.html'"></li>
<script type="text/ng-template" id="tree_item_renderer.html">
<div ng-class="{'active': data.selected}"> {{data.name}}</div>
<button ng-click="add(data)">Add node</button>
<button ng-click="delete(data)" ng-show="data.nodes.length > 0">Delete nodes</button>
<ul>
<li ng-repeat="data in data.nodes" ng-include="'tree_item_renderer.html'" ng-click="setActive($event,data)"></li>
</ul>
</script>
<div style="margin-left:100px;">
Title : <input type="text" ng-model="selectedData.name" ng-blur="checkDuplicateNodeName()" /> Location : <input type="text" ng-model="selectedData.myObj.location" />
</div>
</ul>