一个手写的Vue放大镜,复制即可使用
一个手写的vue放大镜
组件使用less,请确保已安装loader
本组件为放大镜组件,传参列表为:
-
width: 必传,设置放大镜的宽高(正方形),放大区域等同,放大倍数为2倍
-
picList:必传,传入图片列表
使用示例:
script:
import mirror from 'xx/mirror'
export default {
components:{
mirror
},
data(){
return {
width:300,
picList:[
xxxxxx,
xxxxxx
],
}
}
}html:
详细代码:
HTML:
<div ref="truth" :style="{width:'100%',height:'100%'}" @mousemove="move" @mouseenter="showMagnify" @mouseleave="hideMagnify">
<li v-for = "(item,index) in picList" :class="{now:index==picIndex}" :data-index="index" :key ="item" @mouseenter="changeIndex">
JS:
export default {
props:['width','picList'],//宽度是用来给放大镜的
data(){
return {
picIndex:0,
isShowVirtual:false,
showMask:false,
maskPosition:{},
percent:{},
}
},
methods:{
computedOffset(obj,prop){ //计算元素到body的绝对位置
if(obj==document.body || obj.offsetParent == document.body){
return parseInt(obj[prop])
}
return parseInt(obj[prop])+this.computedOffset(obj.offsetParent,prop)
},
changeIndex(e){
this.picIndex = e.target.dataset.index
},
showMagnify(e){
this.showMask=true;
this.isShowVirtual = true;
},
hideMagnify(){
this.isShowVirtual=false;
this.showMask=false
},
computePosition(e){
let x = e.pageX,y = e.pageY;
let mask = this.$refs.mask;
let truth = this.$refs.truth;
let virtual = this.$refs.virtual;
let bigPic = this.$refs.bigPic;
x = x-this.computedOffset(truth,'offsetLeft') -mask.offsetWidth/2;
y = y-this.computedOffset(truth,'offsetTop')- mask.offsetHeight/2;
if(x<=0) {
x=0
}else if(x>truth.offsetWidth - mask.offsetWidth){
x = truth.offsetWidth/2
}
if(y<=0){
y=0;
}
else if(y>truth.offsetHeight - mask.offsetHeight){
y = truth.offsetHeight/2
}
this.maskPosition = {
x,y
}
//计算比例
this.percent={
x:-x/(truth.offsetWidth-mask.offsetWidth)(bigPic.offsetWidth - virtual.offsetWidth)+'px',
y:-y/(truth.offsetHeight-mask.offsetHeight)(bigPic.offsetHeight - virtual.offsetHeight)+'px'
}
},
move(e){
this.computePosition(e)
}
}
}
CSS:
可直接复制文件内容至项目使用,文件地址:https://blog-static.cnblogs.com/files/hhyf/mirror.vue.js
效果


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