<template>
 <div>
  <div v-on:dragover="tts" v-on:drop="ttrs" style="width: 800px;height: 200px;border: 1px solid black;font-size: 40px;line-height: 200px">
   {{dt}}
  </div>
  <div v-for="(item,index) in fileList" :key="index" style="width: 800px;height: 200px;border: 1px solid black;font-size: 40px;position: relative;top:10px">
   <p style="font-size: 20px;float: left;position: relative;left: 20pxword-wrap:break-word;word-break:normal;">{{item.name}}</p>
   <h5 style="float:right;position: absolute;top: 80px;right: 20px">{{item.type}}</h5>
   <h6 style="position: absolute;top: 80px;float: left;left: 20px">{{item.size | sizeType}}</h6>
   <button style="float: right" @click="del(index)">删除</button>
  </div>
 </div>
</template>

<script>
 export default {
  name: "trs",
  data(){
   return{
    dt:"",
    fileList:[]
   }
  },
  filters:{
   sizeType(val){
    let kbs = val/1024;
    let mbs = 0;
    let gbs = 0;
    if(kbs>=1024){
     mbs = kbs/1024;
    }
    if(mbs>=1024){
     gbs=mbs/1024
     return gbs.toFixed(2)+"GB";
    }else if (mbs>=1){
     return mbs.toFixed(2)+"MB"
    }else {
     return kbs.toFixed(2)+"KB"
    }
   }
  },
  mounted() {
   let vm = this;
   window.addEventListener("dragdrop", this.testfunc, false);


   document.addEventListener("dragover",function () {
    console.log(111)
    vm.dt = "拖动到此处上传文件"
    console.log(vm.dt)
   })
  },
  methods:{
   testfunc(event) {
    alert("dragdrop!");
    event.stopPropagation();
    event.preventDefault();
   },
   del(index){
    this.fileList.splice(index,1)
    if(this.fileList.length==0){
     this.dt = ""
    }
   },
   tts(e){
    console.log(e)
    this.dt = "拖动到此处上传文件"
   },
   ttrs(e){
    console.log(e)
    console.log(e.dataTransfer.files)
    let datas = e.dataTransfer.files;
    datas.forEach(item=>{
     this.fileList.push(item)
    })
    e.stopPropagation();
    e.preventDefault();
    this.dt = "上传完成，可继续上传"

   }
  }
 }
</script>

<style scoped>

</style>

<template>
 <div>
 <div
  v-on:dragover="tts"
  v-on:drop="ttrs"
  style="width: 800px;height: 200px;border: 1px solid black;font-size: 40px;line-height: 200px"
 >
  {{ dt }}
 </div>
 <div
  v-for="(item, index) in fileList"
  :key="index"
  style="width: 800px;height: 200px;border: 1px solid black;font-size: 40px;position: relative;top:10px"
 >
  <p
  style="font-size: 20px;float: left;position: relative;left: 20pxword-wrap:break-word;word-break:normal;"
  >
  {{ item.name }}
  </p>
  <h5 style="float:right;position: absolute;top: 80px;right: 20px">
  {{ item.type }}
  </h5>
  <h6 style="position: absolute;top: 80px;float: left;left: 20px">
  {{ item.size | sizeType }}
  </h6>
  <button style="float: right" @click="del(index)">删除</button>
 </div>
 <div style="position:relative;top: 100px">
  <img v-if="isImage" :src="/UploadFiles/2021-04-02/srcs">