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基于vue手写tree插件

作者:互联网

Tree树形控件在前端开发中必不可少,对于数据的展示现在网站大都采取树形展示。因为大数据全部展示出来对于用户来说是不友好的。今天我们自己手写一个Tree插件。

iview提供的控件


<template>
    <Tree :data="data2" show-checkbox></Tree>
</template>

<script>
    export default {
        data () {
            return {
                data2: [
                    {
                        title: 'parent 1',
                        expand: true,
                        children: [
                            {
                                title: 'parent 1-1',
                                expand: true,
                                children: [
                                    {
                                        title: 'leaf 1-1-1'
                                    },
                                    {
                                        title: 'leaf 1-1-2'
                                    }
                                ]
                            },
                            {
                                title: 'parent 1-2',
                                expand: true,
                                children: [
                                    {
                                        title: 'leaf 1-2-1'
                                    },
                                    {
                                        title: 'leaf 1-2-1'
                                    }
                                ]
                            }
                        ]
                    }
                ]
            }
        }
    }
</script>

iview树形图

树形介绍

事件

children

手写控件

同样的我们先来看看他的用法其实和iview一样。用我们封装好的模板就行了。下面是做一个部门树。部门下面挂着人员这个功能。


<zxhtree
        v-if="userChange"
        class="item"
        treekey="deptId"
        treename="deptName"
        treechildren="children"
        :model="deptData"
        :ids="sysUserRole.deptIds"
        :names="sysUserRole.deptNames"
        @keyname="selectedUserObj"
>
</zxhtree>

js就是去填补上述的数据,比如deptData、sysUserRole这些。至于这些属性代表什么意思我们先不着急看。先上个效果图。

树形

那么我们的zxhtree控件是在哪里注册的呢,这里被我们抽离在component.js里。Vue.component('zxhtree', {});
继续在zxhtree里看除绑定的节点是template: '#tree-template'
tree-template的模板是在component.html中写好的


<script type="text/x-template" id="tree-template">
    <div>
        <tree-item
                class="item"
                :treekey="treekey"
                v-for="(model, index) in model"
                :treename="treename"
                :treechildren="treechildren"
                :model="model"
                :ids="ids"
                :names="names"
                @keyname="selectedObj"
                @data="synchdata"
        >
        </tree-item>
    </div>
</script>

而在tree-template用到的tree-item控件才是真正的tree控件。这里是为了将树形包裹起来,所以才包裹了一层模板。
tree-item对应的模板代码是


<script type="text/x-template" id="item-template">
    <ul class="ztree">
        <li class="level0" @blur="blur" @focus="focus" tabindex="0" hidefocus="true" treenode="">
            <input type="checkbox" :disabled="model.disabled" :ref="model[treename]" :checked="checkStatus" @click="selectedObj"/>
            <span title="" @click="toggle" :class="openStatus" treenode_switch=""></span>
            <a :class="selectClass" treenode_a="" onclick="" target="_blank" style="" :title="model[treename]">
                <span title="" treenode_ico="" class="button ico_open" style=""></span>
                <span @dblclick="toggle" class="node_name">{{model[treename]}}</span>
            </a>
            <tree-item
                class="item"
                v-show="open"
                v-for="(model, index) in model[treechildren]"
                :key="index"
                :model="model"
                :treekey="treekey"
                :treename="treename"
                :vistreekey="vistreekey"
                :vistreename="vistreename"
                :treechildren="treechildren"
                ref="child"
                @keyname="keyname"
            >
            </tree-item>
        </li>
    </ul>
</script>

可以很明显的看到这里我们使用了递归进行展示树形结构。因为树形结构你无法确定层级。所以在里面又使用了针对子节点的展示tree-item.

属性含义示例
treekey 内部树形展示 deptId
vistreekey 树形展示key deptId
ids 默认显示的数据
names 默认显示的数据
treename 内部真是展示数据 deptName
vistreename 树形展示数据 deptName
treechildren 当前树的子节点数据
model 当前树的数据
(M)keyname 用于接受返回的数据

手写控件扩展

控件接受数据处理逻辑


//接收到数据在外面套一层
if(this.model[this.treekey]==undefined){
    this.treekey=this.vistreekey;
}
if(this.model[this.treename]==undefined){
    this.treename=this.vistreename;
}
if (this.model.disabled == true) {
    this.model.disabled = 'disabled';
}
console.log('组件注册了吗');
if ((','+this.ids+',').indexOf(','+this.model[this.treekey]+',') == -1) {
    this.checkStatus = false;
    this.model.checkStatus=this.checkStatus;
} else {
    this.checkStatus=true;
    this.model.checkStatus=this.checkStatus;
    this.treekeys[this.model[this.treekey]]= this.checkStatus;
    this.treenames[this.model[this.treename]]= this.checkStatus;
    this.opt.key=this.treekeys;
    this.opt['name']=this.treenames;
}
if(this.ids!=''){
    var idarr = this.ids;
    for(var index in idarr){
        this.treekeys[idarr[index]]=true;
    }
    if (this.names.indexOf(",") == -1&&this.names!='') {
        this.treenames[this.names]=true;
    }else{
        var namearr = this.names.split(",");
        for(var index in namearr){
            this.treenames[namearr[index]]=true;
        }
    }
}

渲染默认数据


var newOpt ={'key':{},'name':{}};
    newOpt.key = Object.assign(this.opt.key, opt.key);
    newOpt.name = Object.assign(this.opt.name, opt.name);
    var flag=false;
    for(var index in this.model[this.treechildren]){
        if(newOpt.key[this.model[this.treechildren][index][this.treekey]]!=true){
            flag=true;
        }
    }
    if(!flag){
        newOpt.key[this.model[this.treekey]]=true;
        newOpt.name[this.model[this.treename]]=true;
        this.checkStatus=true;
        this.model.checkStatus=true;
    }
    for(var key in newOpt){
        this.filterRealCheck(newOpt[key]);
    }
    this.opt=newOpt;
    this.$emit('keyname', newOpt);

选择节点数据处理


if(selected instanceof MouseEvent){
    this.checkStatus=!this.checkStatus;
}else{
    this.checkStatus=selected;
}

this.model.checkStatus=this.checkStatus;
if (this.model.expected != true) {
    this.treekeys[this.model[this.treekey]]= this.checkStatus;
    this.treenames[this.model[this.treename]]= this.checkStatus;
    this.opt.key=this.treekeys;
    this.opt['name']=this.treenames;
}
for(var index in this.$refs.child){
    this.$refs.child[index].selectedObj(this.checkStatus);
}

this.$emit('keyname', this.opt);

手写控件总结

因为笔者是侧重后端,所以前端知识不是很好,这个组件写的也是很乱。这个组件是之前临时写的。里面没有进行系统的梳理,上述的逻辑也是很乱。读者需要的可以选择下列加入战队(#addMe)联系我
需要源码的可关注下面公众号发点击进群后咨询。

转载至烟花散尽13141 https://www.cnblogs.com/zhangxinhua/p/11375929.html

 

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标签:控件,插件,vue,newOpt,tree,checkStatus,key,model,true
来源: https://www.cnblogs.com/zjhcap/p/11544737.html