<template>
 <div>
  <div class="all-div" v-if="model.name">
   <div class="itemRow" :style="{ marginLeft:model.level*20+'px' }">
    <span v-show="model.children.length" @click="expandOrCollapse">
     <img v-if="model.isOpen" src="../../assets/img/login_logo.png">
     <img v-else src="../../assets/img/login_logo2.png">
    </span>
    <div class="hover-div" @mouseover="flag=true" @mouseout="flag=false">
     <span @click="jump(model.url)">{{model.name}}</span>
     <span v-show="flag==true" @click="add" style="fontsize:40px;color:red;">+</span>
     <span v-show="flag==true" @click="remove(model)"><img src="../../assets/img/del.png"></span>
     <span v-show="flag==true" @click="edit" style="color:green;">修改</span>
     <!--<span class="asce" v-show="model.children.length" @click="orderAsce">↑</span>
    <span class="desc" v-show="model.children.length" @click="orderDesc">↓</span>-->
    </div>
 
   </div>
  </div>
  <navigation v-if="model.isOpen" v-for="row in model.children" :key="row.name" :model="row" :length="model.children.length"></navigation>
 </div>
</template>
 
<script>
 export default {
  name: 'navigation',
  // 使用`編輯樹`組件需要傳遞的數據
  props: {
   // 編輯樹對象
   model: {
    type: Object
   },
 
   length: {
    type: Number
   }
  },
 
  data () {
   return {
    flag:false
 
   }
  },
 
  methods: {
   // 添加節(jié)點
   add(){
    let val = prompt("請輸入要添加的節(jié)點的名稱：");
    if (val) {
     this.model.children.push({
      name: val,
      level: this.model.level + 1,
      isOpen: true,
      children: []
     });
    }
 
   },
 
   // 移除節(jié)點
   remove(model){
    var self = this;
    alert('確認刪除嗎?');
    if (self.$parent.model) {
     self.$parent.model.children.forEach((item, index) => {
      if (item.name == model.name) {
      self.$parent.model.children.splice(index, 1);
     }
    })
    }
   },
 
   // 編輯節(jié)點名稱
   edit(){
    var self = this;
    let rename = prompt('請輸入修改后的節(jié)點名稱：');
    // 使用正則進行重命名的差錯校驗
    if (!rename.length) {
     alert('請輸入正確的節(jié)點名稱');
     return;
    }
    self.model.name = rename;
   },
 
   /**
    * 展開/收起功能
    */
   expandOrCollapse(){
    this.model.isOpen = !this.model.isOpen;
   },
   jump(url){
    var self = this;
    self.$router.push({path:url})
   }
 
   /*// 升序排列
    orderAsce(){
    function compare(property) {
    return function (a, b) {
    var value1 = a[property];
    var value2 = b[property];
    return value1 - value2;
    }
    }
    this.model.children.sort(compare('name'));
    },
    // 降序排列
    orderDesc(){
    this.orderAsce();
    this.model.children.reverse();
    }*/
  },
 }
</script>
 
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
 .all-div{
  margin-left: 6%;
 
 }
 .itemRow {
  text-align: left;
  padding-top: 2%;
  padding-bottom: 2%;
 }
 .itemRow span,.itemRow img{
  cursor: pointer;
 }
 .itemRow span{
  font-size: 1.1vw;
 }
 .hover-div{
  display:inline-block;
 }
 
 
</style>

<template>
 <div id="all">
  <tree :model="root" :length="length"></tree>
 </div>
</template>
<style scoped>
 #all{
  width:100%;
  height: 100%;
 }
 
</style>
<script>
 import tree from './tree.vue'
 export default{
  data(){
   return{
    root:{
     name:"根節(jié)點",
     level:0,
     isOpen:true,
     children:[
      {
       name:"節(jié)點1",
       level:1,
       url:"/homePage/middle/navLeftFirst",
       isOpen:false,
       children:[
        {
         name:"節(jié)點1-1",
         level:2,
         isOpen:true,
         children:[]
        },
        {
         name:"節(jié)點1-2",
         level:2,
         isOpen:true,
         children:[]
        }
       ]
      },
      {
       name:"節(jié)點2",
       level:1,
       url:"/homePage/middle/navLeftSecond",
       isOpen:false,
       children:[
        {
         name:"節(jié)點2-1",
         level:2,
         isOpen:true,
         children:[]
        },
        {
         name:"節(jié)點2-2",
         level:2,
         isOpen:true,
         children:[]
        }
       ]
 
      }
     ]
    },
    length:2
   }
  },
  components:{
   tree
  }
 }
</script>