import waterfall from 'vue-waterfall2'
Vue.use(waterfall)

<template>
  <div class="container-water-fall">
    <div><button  @click="loadmore">loadmore</button> <button @click="mix">mix</button> <button @click="switchCol('5')">5列</button> <button @click="switchCol('8')">8列</button> <button @click="switchCol('10')">10列</button> </div>

    <waterfall :col='col' :width="itemWidth" :gutterWidth="gutterWidth"  :data="data"  @loadmore="loadmore"  @scroll="scroll"  >
      <template >
        <div class="cell-item" v-for="(item,index) in data">
          <div class="item-body">
              <div class="item-desc">{{item.title}}</div>
              <div class="item-footer">
                  <div class="avatar" :style="{backgroundImage : `url(${item.avatar})` }"></div>
                  <div class="name">{{item.user}}</div>
                  <div class="like" :class="item.liked?'active':''" >
                      <i ></i>
                      <div class="like-total">{{item.liked}}</div>  
                  </div>
              </div>
          </div>
        </div>
      </template>
    </waterfall>
    
  </div>
</template>


/*
  notes:
  1. attribute `gutterWidth` needs to be used together with `width` to be effective, otherwise it will be adaptive width (when using `rem` to layout, calculate the width after adaptation before passing the value).
  2. Use the parent component of 'waterfall' if there is a problem with the style, remove CSS 'scoped' and try it
*/

import Vue from 'vue'
	export default{
	    data(){
	        return{
	            data:[],
	            col:5,
	        }
	    },
	    computed:{
	      itemWidth(){  
	            return (138*0.5*(document.documentElement.clientWidth/375))  #rem to layout, Calculate the value of width 
	      },
	      gutterWidth(){
	            return (9*0.5*(document.documentElement.clientWidth/375)) #rem to layout, Calculate the value of margin 
	      }
	    },
	    methods:{
            scroll(scrollData){
                console.log(scrollData)
            },
	        switchCol(col){
	            this.col = col
	            console.log(this.col)
	      },
	      loadmore(index){
	            this.data = this.data.concat(this.data)
	      }
	    }
	}