Angular directive递归实现目录树结构代码实例
程序员文章站
2022-06-03 12:32:39
整理文档，搜刮出一个angular directive递归实现目录树结构代码实例代码，稍微整理精简一下做下分享。
效果图：
重点：
1. 整棵目录树的实现，通...
整理文档，搜刮出一个angular directive递归实现目录树结构代码实例代码，稍微整理精简一下做下分享。
效果图：
重点：
1. 整棵目录树的实现，通过嵌套完成，主要在于对treeitem.html的递归使用
<script type="text/ng-template" id="treeview.html">
<ul>
<li ng-repeat="item in treedata.children" ng-include="'treeitem.html'"></li>
</ul>
</script>
<script type="text/ng-template" id="treeitem.html">
<span class="color-indictor" ng-class="{'leaf-node': isleaf(item), 'expand-node': !isleaf(item) && item.isexpand, 'unexpand-node': !isleaf(item) && !item.isexpand}" ng-click="toggleexpandstatus(item)"></span>
<span>{{item.name}}</span>
<ul ng-if="!isleaf(item)" ng-show="item.isexpand">
<li ng-repeat="item in item.children" ng-include="'treeitem.html'"></li>
</ul>
</script>
2. 点击展开/关闭目录树
通过ng-show对item.expand进行判断，点击item时切换其expand参数，完成目录树的打开与关闭
3. 源码
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.9/angular.js"></script>
<script>
angular.module("treeapp", [])
.controller("treecontroller", function($scope){
$scope.jsondata = {
name: 'menu',
children: [{
name: 'a',
children: [{
name: 'a.1',
children: [{
name: 'a.1.1',
children: []
}]
},{
name: 'a.2',
children: [{
name: 'a.2.1',
children: [{
name: 'a.2.1.1',
children: []
}]
},{
name: 'a.2.2',
children: []
}]
}]
},{
name: 'b',
children: [{
name: 'b.1',
children: []
},{
name: 'b.2',
children: []
}]
},{
name: 'c',
children: []
}]
};
}).directive('treeview', function(){
return {
restrict: 'e',
templateurl: 'treeview.html',
scope: {
treedata: '='
},
controller: function($scope){
$scope.isleaf = function(item){
return !item.children || !item.children.length;
};
$scope.toggleexpandstatus = function(item){
item.isexpand = !item.isexpand;
};
}
};
});
</script>
<style>
ul{
list-style: none;
}
.color-indictor{
display: inline-block;
width: 20px;
height: 20px;
cursor: pointer;
}
.color-indictor.leaf-node{
background: red;
}
.color-indictor.unexpand-node{
background: green;
}
.color-indictor.expand-node{
background-color: yellow;
}
</style>
<body ng-app="treeapp" ng-controller="treecontroller">
<div>
<p>introduce: click green block expand the menu tree</p>
<p>red: leaf node, can not click</p>
<p>green: unexpand node, click to expand menu</p>
<p>yellow: expanded node, click to unexpand menu</p>
</div>
<tree-view tree-data="jsondata"></tree-view>
</body>
<script type="text/ng-template" id="treeview.html">
<ul>
<li ng-repeat="item in treedata.children" ng-include="'treeitem.html'"></li>
</ul>
</script>
<script type="text/ng-template" id="treeitem.html">
<span class="color-indictor" ng-class="{'leaf-node': isleaf(item), 'expand-node': !isleaf(item) && item.isexpand, 'unexpand-node': !isleaf(item) && !item.isexpand}" ng-click="toggleexpandstatus(item)"></span>
<span>{{item.name}}</span>
<ul ng-if="!isleaf(item)" ng-show="item.isexpand">
<li ng-repeat="item in item.children" ng-include="'treeitem.html'"></li>
</ul>
</script>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。