基於Vue實現可以拖拽排序的樹形表格
專案需要一個可以拖拽排序的樹形表格,github上搜了一下,併為找到,大部分都不支援拖拽,所以自己實現了一個簡單的元件,已開源 ofollow,noindex">原始碼在這裡 ,併發布到npm上,如果有類似需求可以試一下,chrome上沒有任何問題
效果圖如下:

使用方式
npm i drag-tree-table --save-dev 複製程式碼
import dragTreeTable from 'drag-tree-table' 複製程式碼
<dragTreeTable :data="treeData" :onDrag="onTreeDataChange"></dragTreeTable> 複製程式碼
// state treeData: { lists: [], columns: [] } // methods onTreeDataChange(list) { this.treeData.lists = list }, 複製程式碼
資料來源(lists)配置
引數 | 可選值 | 描述 |
---|---|---|
id | String | 唯一標誌 |
parent_id | String | 父節點ID |
order | Number | 排序,0開始,onDrag後order會重置 |
name | String | 預設顯示內容 |
open | Boolean | true展開,false收起 |
lists | Array | 子節點 |
lists 配置示例
[ { "id":40, "parent_id":0, "order":0, "name":"動物類", "uri":"/masd/ds", "open":true, "lists":[] },{ "id":5, "parent_id":0, "order":1, "name":"昆蟲類", "uri":"/masd/ds", "open":true, "lists":[ { "id":12, "parent_id":5, "open":true, "order":0, "name":"螞蟻", "uri":"/masd/ds", "lists":[] } ] }, { "id":19, "parent_id":0, "order":2, "name":"植物類", "uri":"/masd/ds", "open":true, "lists":[] } ] 複製程式碼
列(columns)配置
引數 | 可選值 | 描述 |
---|---|---|
type | 'selection', 'actions' | selection會顯示摺疊圖示,actions指操作欄 |
title | String | 表格標題 |
field | String | 單元格內容取值使用 |
width | Number | 單元格寬度 |
align | left,center,right | 單元格對齊方式,預設局左對齊 |
formatter | Function | 自定義單元格顯示內容,引數為當前行資料 |
columns 配置示例
[ { type: 'selection', title: '選單名稱', field: 'name', width: 200, align: 'center', formatter: (item) => { return '<a>'+item.name+'</a>' } }, { title: '連結', field: 'url', width: 200, align: 'center' }, { title: '操作', type: 'action', width: 350, align: 'center', actions: [ { text: '檢視角色', onclick: this.onDetail, formatter: (item) => { return '<i>檢視角色</i>' } }, { text: '編輯', onclick: this.onEdit, formatter: (item) => { return '<i>編輯</i>' } } ] }, ] 複製程式碼
實現原理
元件結構
dragTreeTable.vue是入口元件,定義整體結構 row是遞迴元件(核心元件) clolmn單元格,內容承載 space控制縮排 複製程式碼
核心點
1. 核心元件row,通過元件遞迴自己實現樹形結構,並非用JSX方式 2. 通過v-html傳入函式,返回自定義html,實現單元格內容自定義 3. 通過H5的新特性draggable,實現拖拽,拖拽的同時需要匹配對應的行,並區分上/中/下,分別對應上移/下移/中間插入,並高亮,drop時對陣列進行重新排列,生成新的陣列 複製程式碼
遞迴呼叫寫法如下
<template> <div class="tree-block" draggable="true" @dragstart="dragstart($event)" @dragend="dragend($event)"> <div class="tree-row" @click="toggle" :tree-id="model.id" :tree-p-id="model.parent_id"> <column v-for="(subItem, subIndex) in columns" v-bind:class="'align-' + subItem.align" :field="subItem.field" :width="subItem.width" :key="subIndex"> <span v-if="subItem.type === 'selection'"> <space :depth="depth"/> <span v-if = "model.lists && model.lists.length" class="zip-icon" v-bind:class="[model.open ? 'arrow-bottom' : 'arrow-right']"> </span> <span v-else class="zip-icon arrow-transparent"> </span> <span v-if="subItem.formatter" v-html="subItem.formatter(model)"></span> <span v-else v-html="model[subItem.field]"></span> </span> <span v-else-if="subItem.type === 'action'"> <a class="action-item" v-for="(acItem, acIndex) in subItem.actions" :key="acIndex" type="text" size="small" @click.stop.prevent="acItem.onclick(model)"> <i :class="acItem.icon" v-html="acItem.formatter(model)"></i> </a> </span> <span v-else-if="subItem.type === 'icon'"> {{model[subItem.field]}} </span> <span v-else> {{model[subItem.field]}} </span> </column> <div class="hover-model" style="display: none"> <div class="hover-block prev-block"> <i class="el-icon-caret-top"></i> </div> <div class="hover-block center-block"> <i class="el-icon-caret-right"></i> </div> <div class="hover-block next-block"> <i class="el-icon-caret-bottom"></i> </div> </div> </div> <row v-show="model.open" v-for="(item, index) in model.lists" :model="item" :columns="columns" :key="index" :depth="depth * 1 + 1" v-if="isFolder"> </row> </div> </template> 複製程式碼
動態匹配實現
filter(x,y) { var rows = document.querySelectorAll('.tree-row') this.targetId = undefined for(let i=0; i < rows.length; i++) { const row = rows[i] const rx = this.getElementLeft(row); const ry = this.getElementTop(row); const rw = row.clientWidth; const rh = row.clientHeight; if (x > rx && x < (rx + rw) && y > ry && y < (ry + rh)) { const diffY = y - ry const hoverBlock = row.children[row.children.length - 1] hoverBlock.style.display = 'block' const targetId = row.getAttribute('tree-id') if (targetId == window.dragId){ this.targetId = undefined return } this.targetId = targetId let whereInsert = '' var rowHeight = document.getElementsByClassName('tree-row')[0].clientHeight if (diffY/rowHeight > 3/4) { if (hoverBlock.children[2].style.opacity !== '0.5') { this.clearHoverStatus() hoverBlock.children[2].style.opacity = 0.5 } whereInsert = 'bottom' } else if (diffY/rowHeight > 1/4) { if (hoverBlock.children[1].style.opacity !== '0.5') { this.clearHoverStatus() hoverBlock.children[1].style.opacity = 0.5 } whereInsert = 'center' } else { if (hoverBlock.children[0].style.opacity !== '0.5') { this.clearHoverStatus() hoverBlock.children[0].style.opacity = 0.5 } whereInsert = 'top' } this.whereInsert = whereInsert } } } 複製程式碼