工作中遇到一个需求，需要做一个类似飞书仪表盘的可拖拽、可自定义位置大小的数据展示页。
仪表盘
调研
这种拖拽的库既然市面上有，那么第一个想到的应该就是找成熟的第三方库（我自己也试着实现了下，但发现其中细节处理很多，想要自己撸需要多花时间、多自测，很划不来）。
一开始的思路是调研 DND 组件：
- vue-smooth-dnd: https://kutlugsahin.github.io/vue-smooth-dnd/#/cards
- vue3-dnd: https://haochenguang.gitee.io/vue3-dnd/example/dustbin/copy-or-move.html
结果发现都不尽如人意，上面两者都是做拖拽排序为主的。和飞书的仪表盘功能大相径庭。
在自己动手撸了一半后，突发奇想想看看飞书用的什么库。与是开始看它的 HTML 代码。发现了这种 CSS 类。
code
呜呼，谜底揭晓。一看到这种 class 名就感觉应该是第三方库，网上一查果然如此。那么既然有 React 版本，大概率就会存在 Vue 版本。
开发
于是乎，事情就简单了。找到一个最近似于业务的例子，再参照其官方文档里面的各种说明，很轻松的就能实现一个类似飞书仪表盘的页面了。
<template>
<grid-layout :layout.sync="layout"
:col-num="12"
:row-height="30"
:is-draggable="draggable"
:is-resizable="resizable"
:vertical-compact="true"
:use-css-transforms="true"
>
<grid-item v-for="item in layout"
:static="item.static"
:x="item.x"
:y="item.y"
:w="item.w"
:h="item.h"
:i="item.i"
>
<span class="text">{{itemTitle(item)}}</span>
</grid-item>
</grid-layout>
</template>
<script>
import { GridLayout, GridItem } from "vue-grid-layout"
export default {
components: {
GridLayout,
GridItem
},
data() {
return {
layout: [
{"x":0,"y":0,"w":2,"h":2,"i":"0", static: false},
{"x":2,"y":0,"w":2,"h":4,"i":"1", static: true},
{"x":4,"y":0,"w":2,"h":5,"i":"2", static: false},
{"x":6,"y":0,"w":2,"h":3,"i":"3", static: false},
{"x":8,"y":0,"w":2,"h":3,"i":"4", static: false},
{"x":10,"y":0,"w":2,"h":3,"i":"5", static: false},
{"x":0,"y":5,"w":2,"h":5,"i":"6", static: false},
{"x":2,"y":5,"w":2,"h":5,"i":"7", static: false},
{"x":4,"y":5,"w":2,"h":5,"i":"8", static: false},
{"x":6,"y":3,"w":2,"h":4,"i":"9", static: true},
{"x":8,"y":4,"w":2,"h":4,"i":"10", static: false},
{"x":10,"y":4,"w":2,"h":4,"i":"11", static: false},
{"x":0,"y":10,"w":2,"h":5,"i":"12", static: false},
{"x":2,"y":10,"w":2,"h":5,"i":"13", static: false},
{"x":4,"y":8,"w":2,"h":4,"i":"14", static: false},
{"x":6,"y":8,"w":2,"h":4,"i":"15", static: false},
{"x":8,"y":10,"w":2,"h":5,"i":"16", static: false},
{"x":10,"y":4,"w":2,"h":2,"i":"17", static: false},
{"x":0,"y":9,"w":2,"h":3,"i":"18", static: false},
{"x":2,"y":6,"w":2,"h":2,"i":"19", static: false}
],
draggable: true,
resizable: true,
index: 0
}
},
methods: {
itemTitle(item) {
let result = item.i;
if (item.static) {
result += " - Static";
}
return result;
}
}
}
</script>
<style scoped>
.vue-grid-layout {
background: #eee;
}
.vue-grid-item:not(.vue-grid-placeholder) {
background: #ccc;
border: 1px solid black;
}
.vue-grid-item .resizing {
opacity: 0.9;
}
.vue-grid-item .static {
background: #cce;
}
.vue-grid-item .text {
font-size: 24px;
text-align: center;
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
margin: auto;
height: 100%;
width: 100%;
}
.vue-grid-item .no-drag {
height: 100%;
width: 100%;
}
.vue-grid-item .minMax {
font-size: 12px;
}
.vue-grid-item .add {
cursor: pointer;
}
.vue-draggable-handle {
position: absolute;
width: 20px;
height: 20px;
top: 0;
left: 0;
background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10'><circle cx='5' cy='5' r='5' fill='#999999'/></svg>") no-repeat;
background-position: bottom right;
padding: 0 8px 8px 0;
background-repeat: no-repeat;
background-origin: content-box;
box-sizing: border-box;
cursor: pointer;
}
</style>
遇到的问题
在加入了 vue-grid-layout 的库之后，npm i 时间一下子增加了 8 分钟
或许是公司网络问题，但这个安装时间着实忍不了，于是就将编译好的文件直接放到了本地来用。
import { GridLayout, GridItem } from '@/libs/vue-grid-layout.common'
最后
所以，遇到明显有人做过的需求，写别忙着自己撸。基本上必定有现成方案。如果无从下手通过看类似网页的 HTML 来了解他们用到的库和样式，是种很不错的学习方式。
