<template>
<div class="waterfall" :style="{height: waterHeight + 'px'}">
<div class="v-waterfall-content" id="v-waterfall">
<div
v-for="(img, index) in waterfallList"
:key="index"
class="v-waterfall-item"
:style="{
top: img.top + 'px',
left: img.left + 'px',
width: waterfallImgWidth + 'px',
height: img.height,
}"
>
<img :src="img.src" alt="" />
</div>
</div>
</div>
</template>
<script>
import axios from 'axios'
export default {
name: "v-waterfall",
data () {
return {
waterfallList: [],
imgArr: [
],
waterfallImgWidth: 0,
waterfallImgCol: 2,
waterfallImgRight: 10,
waterfallImgBottom: 10,
waterfallDeviationHeight: [],
imgList: [],
waterHeight: 0
}
},
props: ['imgLists'],
created () {
this.imgArr = this.imgLists;
for (let i = 0; i < this.imgArr.length; i++) {
this.imgList.push(this.imgArr[i]);
}
},
mounted () {
console.log(this.waterfallList, 'waterfallList');
this.calculationWidth();
},
methods: {
calculationWidth () {
let domWidth = document.getElementById("v-waterfall").offsetWidth;
if (!this.waterfallImgWidth && this.waterfallImgCol) {
this.waterfallImgWidth = (domWidth - this.waterfallImgRight * (this.waterfallImgCol - 1)) / this.waterfallImgCol;
console.log(this.waterfallImgWidth, 'this.waterfallImgWidth')
} else if (this.waterfallImgWidth && !this.waterfallImgCol) {
this.waterfallImgCol = Math.floor(domWidth / (this.waterfallImgWidth + this.waterfallImgRight))
}
this.waterfallDeviationHeight = new Array(this.waterfallImgCol);
for (let i = 0; i < this.waterfallDeviationHeight.length; i++) {
this.waterfallDeviationHeight[i] = 0;
}
this.imgPreloading()
},
imgPreloading () {
for (let i = 0; i < this.imgList.length; i++) {
let aImg = new Image();
aImg.src = this.imgList[i];
aImg.onload = aImg.onerror = (e) => {
let imgData = {};
imgData.height = this.waterfallImgWidth / aImg.width * aImg.height;
imgData.src = this.imgList[i];
this.waterfallList.push(imgData);
this.rankImg(imgData);
}
}
},
rankImg (imgData) {
let {
waterfallImgWidth,
waterfallImgRight,
waterfallImgBottom,
waterfallDeviationHeight
} = this;
let minIndex = this.filterMin();
imgData.top = waterfallDeviationHeight[minIndex];
imgData.left = minIndex * (waterfallImgRight + waterfallImgWidth);
waterfallDeviationHeight[minIndex] += imgData.height + waterfallImgBottom;
this.waterHeight = this.getHeight();
},
filterMin () {
const min = Math.min.apply(null, this.waterfallDeviationHeight);
return this.waterfallDeviationHeight.indexOf(min);
},
filterMax() {
const max = Math.max.apply(null, this.waterfallDeviationHeight);
return this.waterfallDeviationHeight.indexOf(max);
},
getHeight() {
return Math.max.apply(null, this.waterfallDeviationHeight);
}
}
}
</script>
<style scoped>
.waterfall {
width: 100%;
padding: 0 24px;
margin: 0 auto;
}
.v-waterfall-content {
width: 100%;
position: relative;
}
.v-waterfall-item {
float: left;
position: absolute;
}
.v-waterfall-item img {
width: 100%;
height: auto;
border-radius: 6px;
padding-bottom: 100px;
}
</style>