- 封装文件目录组件
- 操作目录
- 多个属性v-model替代方案
- 增加钩子函数
最终呈现的效果如图:
父组件folder-tree.vue:
<template>
<div class="folder-wrapper">
<!-- 原来直接调用iview的tree组件，现在自己写个floder-tree然后在里面调用tree组件，形成自己的封装组件 -->
<!-- <Tree :data="folderTree" :render="renderFunc"></Tree> -->
<!-- folder-tree组件是在components调用tree，然后再加入render函数等完成自己的封装组件 -->
<folder-tree
:folder-list.sync="folderList"
:file-list.sync="fileList"
:folder-drop="folderDrop"
:file-drop="fileDrop"
:beforeDelete="beforeDelete"
/>
</div>
</template>
<script>
import { getFolderList, getFileList } from '@/api/data'
import FolderTree from '_c/folder-tree'
export default {
components: {
FolderTree
},
data () {
return {
folderList: [],
fileList: [],
folderDrop: [
{
name: 'rename',
title: '重命名'
},
{
name: 'delete',
title: '删除文件夹'
}
],
fileDrop: [
{
name: 'rename',
title: '重命名'
},
{
name: 'delete',
title: '删除文件'
}
]
}
},
methods: {
// 模拟调用的接口
beforeDelete () {
return new Promise((resolve, reject) => {
setTimeout(() => {
// 模拟出错
let error = new Error('error')
// 如果没有出错
if (!error) {
resolve()
} else reject(error)
}, 2000)
})
}
},
mounted () {
Promise.all([getFolderList(), getFileList()]).then(res => {
this.folderList = res[0]
this.fileList = res[1]
})
}
}
</script>
<style lang="less">
.folder-wrapper{
width: 300px;
}
</style>子组件folder-tree.vue：
<template>
<Tree :data="folderTree" :render="renderFunc"></Tree>
</template>
<script>
import { putFileInFolder, transferFolderToTree, expandSpecifiedFolder } from '@/lib/util'
import clonedeep from 'clonedeep'
export default {
name: 'FolderTree',
data () {
return {
folderTree: [],
currentRenamingId: '',
currentRenamingContent: '',
/**
* @description: Render 函数可以自定义节点显示内容和交互，比如添加图标，按钮等
* @param {type} 第一个参数必须要传h,Render 函数的第二个参数，包含三个字段：
root <Array>：树的根节点
node <Object>：当前节点
data <Object>：当前节点的数据
* @return: 返回一个JSX
*/
renderFunc: (h, { root, node, data }) => {
// 判断是文件夹还是文件
const dropList = data.type === 'folder' ? this.folderDrop : this.fileDrop
const dropdownRender = dropList.map(item => {
return (<dropdownItem name={item.name}>{ item.title }</dropdownItem>)
})
// 是否正在重命名操作，并且重新渲染组件的时候能判断出哪一个元素正在改名字!!!
const isRenaming = this.currentRenamingId === `${data.type || 'file'}_${data.id}`
return (
<div class="tree-item">
// 判断是文件夹还是文件，加上icon
{ data.type === 'folder' ? <icon type="ios-folder" color="#2d8cf0" style="margin-right: 10px;"/> : ''}
// 是否进行重命名操作的渲染变化
{
isRenaming
? <span>
<i-input value={data.title} on-input={this.handleInput} class="tree-rename-input"></i-input>
<i-button size="small" type="text" on-click={this.saveRename.bind(this, data)}><icon type="md-checkmark" /></i-button>
<i-button size="small" type="text"><icon type="md-close" /></i-button>
</span>
: <span>{ data.title }</span>
}
// 是否展示右侧的下拉菜单
{
dropList && !isRenaming ? <dropdown placement="right-start" on-on-click={this.handleDropdownClick.bind(this, data)}>
<i-button size="small" type="text" class="tree-item-button">
<icon type="md-more" size={12}/>
</i-button>
<dropdownMenu slot="list">
{ dropdownRender }
</dropdownMenu>
</dropdown> : ''
}
</div>
)
}
}
},
props: {
folderList: {
type: Array,
default: () => []
},
fileList: {
type: Array,
default: () => []
},
folderDrop: Array,
fileDrop: Array,
beforeDelete: Function
},
watch: {
folderList () {
this.transData()
},
fileList () {
this.transData()
}
},
methods: {
transData () {
this.folderTree = transferFolderToTree(putFileInFolder(this.folderList, this.fileList))
},
isFolder (type) {
return type === 'folder'
},
handleDelete (data) {
const folderId = data.folder_id
// 是否是文件夹
const isFolder = this.isFolder(data.type)
let updateListName = isFolder ? 'folderList' : 'fileList'
let list = isFolder ? clonedeep(this.folderList) : clonedeep(this.fileList)
// 返回不删除的list，该删的文件或文件夹已经不在list里了
list = list.filter(item => item.id !== data.id)
// 更新父组件传入的folderList或者fileList函数!!!!!
this.$emit(`update:${updateListName}`, list)
// 更新tree组件视图，使删除的文件或文件夹父级是展开的
this.$nextTick(() => {
expandSpecifiedFolder(this.folderTree, folderId)
})
},
handleDropdownClick (data, name) {
// 如果点击下拉框的改名字按钮
if (name === 'rename') {
// 现在正在改名字的文件或者文件夹
this.currentRenamingId = `${data.type || 'file'}_${data.id}`
// 如果点击的是删除按钮
} else if (name === 'delete') {
this.$Modal.confirm({
title: '提示',
content: `您确定要删除${this.isFolder(data.type) ? '文件夹' : '文件'}《${data.title}》吗？`,
onOk: () => {
// 模拟调用的接口: 如果传进来了就判断成功与失败否则就直接删除
this.beforeDelete ? this.beforeDelete().then(() => {
this.handleDelete(data)
}).catch(() => {
this.$Message.error('删除失败')
}) : this.handleDelete(data)
}
})
}
},
handleInput (value) {
this.currentRenamingContent = value
},
/**
* @description: 更新传入的list数组
* @param {array, num} list 需要更新的数组，id 需要更新的元素id
* @return: 更新完的list数组
*/
updateList (list, id) {
let i = -1
let len = list.length
// 循环list数组
while (++i < len) {
let folderItem = list[i]
// 如果传入的id和list里的元素id相同，说明更改了这个元素
if (folderItem.id === id) {
// 满足条件的元素name值为改变的值，然后放到更新一下list
folderItem.name = this.currentRenamingContent
list.splice(i, 1, folderItem)
break
}
}
return list
},
saveRename (data) {
const id = data.id
const type = data.type
if (type === 'folder') {
const list = this.updateList(clonedeep(this.folderList), id)
// 更新父组件传入的值
this.$emit('update:folderList', list)
} else {
const list = this.updateList(this.fileList, id)
this.$emit('update:fileList', list)
}
this.currentRenamingId = ''
}
},
mounted () {
this.transData()
}
}
</script>
<style lang="less">
.tree-item{
display: inline-block;
width: ~"calc(100% - 50px)";
height: 30px;
line-height: 30px;
& > .ivu-dropdown{
float: right;
}
ul.ivu-dropdown-menu{
padding-left: 0;
}
li.ivu-dropdown-item{
margin: 0;
padding: 7px 16px;
}
.tree-rename-input{
width: ~"calc(100% - 80px)";
}
}
</style>util.js中的expandSpecifiedFolder函数:
export const expandSpecifiedFolder = (folderTree, id) => {
return folderTree.map(item => {
if (item.type === 'folder') {
if (item.id === id) {
item.expand = true
} else {
// 如果文件夹有children的话
if (item.children && item.children.length) {
// 递归调用
item.children = expandSpecifiedFolder(item.children, id)
// 如果item的子集children里有一个child的expand为true，那么item的expand就为true
if (item.children.some(child => {
return child.expand === true
})) {
item.expand = true
} else {
item.expand = false
}
}
}
}
return item
})
}