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本篇内容主要讲解“vue中怎么使用elementui实现树组件tree右键增删改功能”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“vue中怎么使用elementui实现树组件tree右键增删改功能”吧!
1、右击节点可进行增删改
2、可对节点数据进行模糊查询
3、右击第一级节点可以进行同级节点增加
4、双击节点或点击修改节点 都可以对节点获取焦点并进行修改，回车修改成功
5、可对节点进行拖拽，实现节点移动功能
<template>
<div class="lalala tree-container">
<el-input placeholder="输入关键字进行过滤" v-model="filterText" class="search">
</el-input>
<el-tree :data="treeData" node-key="id" default-expand-all @node-click="handleLeftclick" @node-drag-start="handleDragStart" @node-drag-enter="handleDragEnter" @node-drag-leave="handleDragLeave" @node-drag-over="handleDragOver" @node-drag-end="handleDragEnd" @node-drop="handleDrop" @node-contextmenu="rightClick" :filter-node-method="filterNode" draggable :allow-drop="allowDrop" :allow-drag="allowDrag" ref="tree">
<span class="slot-t-node" slot-scope="{ node, data }" @dblclick="editNode(data)">
<span v-show="!data.isEdit">
<span :class="[data.id>= 99 ? 'slot-t-node--label' : '']">{{node.label}}</span>
</span>
<span v-show="data.isEdit">
<el-input class="slot-t-input" size="mini" autofocus v-model="data.label" :ref="'slotTreeInput'+data.id" @blur.stop="NodeBlur(node,data)" @keydown.native.enter="NodeBlur(node,data)"></el-input>
</span>
</span>
</el-tree>
<el-card class="box-card" ref="card" v-show="menuVisible">
<div @click="addSameLevelNode()" v-show="firstLevel">
<i class="el-icon-circle-plus-outline"></i> 同级增加
</div>
<div class="add" @click="addChildNode()">
<i class="el-icon-circle-plus-outline"></i> 子级增加
</div>
<div class="delete" @click="deleteNode()">
<i class="el-icon-remove-outline"></i> 删除节点
</div>
<div class="edit" @click="editNode()">
<i class="el-icon-edit"></i> 修改节点
</div>
</el-card>
</div>
</template>
<script>
export default {
name: 'tree',
data() {
return {
eleId: '',
isShow: false,
currentData: '',
currentNode: '',
menuVisible: false,
firstLevel: false,
filterText: '',
maxexpandId: 4,
treeData: [{
id: 1,
label: '一级 1',
isEdit: false,
children: [{
id: 4,
label: '二级 1-1',
isEdit: false,
children: [{
id: 9,
label: '三级 1-1-1',
isEdit: false
}, {
id: 10,
label: '三级 1-1-2',
isEdit: false
}]
}]
}, {
id: 2,
label: '一级 2',
isEdit: false,
children: [{
id: 5,
label: '二级 2-1',
isEdit: false
}, {
id: 6,
label: '二级 2-2',
isEdit: false
}]
}, {
id: 3,
label: '一级 3',
isEdit: false,
children: [{
id: 7,
label: '二级 3-1',
isEdit: false
}, {
id: 8,
label: '二级 3-2',
isEdit: false,
children: [{
id: 11,
label: '三级 3-2-1',
isEdit: false
}, {
id: 12,
label: '三级 3-2-2',
isEdit: false
}, {
id: 13,
label: '三级 3-2-3',
isEdit: false
}]
}]
}],
defaultProps: {
children: 'children',
label: 'label'
}
}
},
methods: {
NodeBlur(Node, data) {
console.log(Node, data)
if (data.label.length === 0) {
this.$message.error('菜单名不可为空！')
return false
} else {
if (data.isEdit) {
this.$set(data, 'isEdit', false)
console.log(data.isEdit)
}
this.$nextTick(() => {
this.$refs['slotTreeInput' + data.id].$refs.input.focus()
})
}
},
// 查询
filterNode(value, data) {
if (!value) return true
return data.label.indexOf(value) !== -1
},
allowDrop(draggingNode, dropNode, type) {
if (dropNode.data.label === '二级 3-1') {
return type !== 'inner'
} else {
return true
}
},
allowDrag(draggingNode) {
return draggingNode.data.label.indexOf('三级 3-2-2') === -1
},
// 鼠标右击事件
rightClick(event, object, Node, element) {
console.log(event, object)
this.currentData = object
this.currentNode = Node
if (Node.level === 1) {
this.firstLevel = true
} else {
this.firstLevel = false
}
this.menuVisible = true
// let menu = document.querySelector('#card')
// /* 菜单定位基于鼠标点击位置 */
// menu.style.left = event.clientX + 'px'
// menu.style.top = event.clientY + 'px'
document.addEventListener('click', this.foo)
this.$refs.card.$el.style.left = event.clientX + 10 + 'px'
this.$refs.card.$el.style.top = event.clientY - 60 + 'px'
},
// 鼠标左击事件
handleLeftclick(data, node) {
this.foo()
},
// 取消鼠标监听事件 菜单栏
foo() {
this.menuVisible = false
// 要及时关掉监听，不关掉的是一个坑，不信你试试，虽然前台显示的时候没有啥毛病，加一个alert你就知道了
document.removeEventListener('click', this.foo)
},
// 增加同级节点事件
addSameLevelNode() {
let id = Math.ceil(Math.random() * 100)
var data = { id: id, label: '新增节点' }
this.$refs.tree.append(data, this.currentNode.parent)
},
// 增加子级节点事件
addChildNode() {
console.log(this.currentData)
console.log(this.currentNode)
if (this.currentNode.level >= 3) {
this.$message.error('最多只支持三级！')
return false
}
let id = Math.ceil(Math.random() * 100)
var data = { id: id, label: '新增节点' }
this.$refs.tree.append(data, this.currentNode)
},
// 删除节点
deleteNode() {
this.$refs.tree.remove(this.currentNode)
},
// 编辑节点
editNode(data) {
console.log(data)
this.currentData = data ? data : this.currentData
if (!this.currentData.isEdit) {
this.$set(this.currentData, 'isEdit', true)
}
// 获取焦点
this.$nextTick(() => {
this.$refs['slotTreeInput' + this.currentData.id].focus()
})
},
handleDragStart(node, ev) {
console.log('drag start', node)
},
handleDragEnter(draggingNode, dropNode, ev) {
console.log('tree drag enter: ', dropNode.label)
},
handleDragLeave(draggingNode, dropNode, ev) {
console.log('tree drag leave: ', dropNode.label)
},
handleDragOver(draggingNode, dropNode, ev) {
console.log('tree drag over: ', dropNode.label)
},
handleDragEnd(draggingNode, dropNode, dropType, ev) {
console.log('tree drag end: ', dropNode && dropNode.label, dropType)
},
handleDrop(draggingNode, dropNode, dropType, ev) {
console.log('tree drop: ', dropNode.label, dropType)
},
},
watch: {
filterText(val) {
this.$refs.tree.filter(val)
}
},
mounted() {
}
}
</script>
<style scoped lang="less">
/* 点击节点时的选中颜色 */
.tree-container /deep/.el-tree-node.is-current > .el-tree-node__content {
color: blue !important;
}
.tree-container /deep/ .el-tree-node__expand-icon.expanded {
-webkit-transform: rotate(90deg);
transform: rotate(90deg);
}
.tree-container /deep/ .el-icon-caret-right:before {
content: "\e791";
font-size: 18px;
}
.tree-container /deep/ .el-tree-node__expand-icon {
margin-left: 15px;
padding: 0px;
}
.tree-container /deep/ .el-tree-node__expand-icon.is-leaf {
margin-left: 0px;
}
.tree-container /deep/ .el-tree-node {
position: relative;
padding-left: 16px;
// text-indent: 16px;
}
.tree-container /deep/ .el-tree-node__children {
padding-left: 16px;
}
.tree-container /deep/ .el-tree > .el-tree-node:before {
border-left: none;
}
.tree-container /deep/ .el-tree > .el-tree-node:after {
border-top: none;
}
.tree-container /deep/ .el-tree > .el-tree-node:before {
border-left: none;
}
.tree-container /deep/ .el-tree > .el-tree-node:after {
border-top: none;
}
.tree-container /deep/ .el-tree-node:before {
content: "";
left: 10px;
position: absolute;
right: auto;
border-width: 1px;
}
.tree-container /deep/ .el-tree-node:after {
content: "";
left: 10px;
position: absolute;
right: auto;
border-width: 1px;
}
.tree-container /deep/ .el-tree-node:before {
border-left: 1px dashed #ccc;
bottom: 0px;
height: 100%;
top: -19px;
width: 1px;
}
.tree-container /deep/ .el-tree-node:after {
border-top: 1px dashed #ccc;
height: 25px;
top: 20px;
width: 20px;
}
.el-tree-node :last-child:before {
height: 40px;
}
.tree-container {
margin: 10px;
}
.tree-container /deep/ .el-tree .el-tree-node {
position: relative;
}
.tree-container /deep/ .el-tree-node .el-tree-node__content {
height: 34px;
padding-left: 0px !important;
border: none;
}
.tree-container /deep/ .el-tree-node .el-tree-node__content::before {
border-left: 1px dashed #ccc;
height: 100%;
top: 0;
width: 1px;
margin-left: 1px;
margin-top: 0px;
z-index: 8;
}
.tree-container
/deep/
.el-tree-node
.el-tree-node__children
.el-tree-node__content::before {
border-left: 0px dashed #ccc;
height: 100%;
top: 0;
width: 1px;
margin-left: 1px;
margin-top: 0px;
z-index: 8;
}
.tree-container /deep/ .el-tree-node .el-tree-node__content::after {
border-top: 1px dashed #ccc;
height: 1px;
top: 18px;
width: 13px;
margin-left: 1px;
z-index: 8;
}
.tree-container
/deep/
.el-tree-node
.el-tree-node__children
.el-tree-node__content::after {
border-top: 0px dashed #ccc;
}
.tree-container .el-tree-node .el-tree-node__content::before,
.tree-container .el-tree-node .el-tree-node__content::after {
content: "";
position: absolute;
right: auto;
}
/deep/.el-table__placeholder {
padding-left: 8px;
}
/deep/.el-card__body {
padding: 10px !important;
> div {
padding-bottom: 10px;
border-bottom: 1px solid #ccc;
&:hover {
color: blue;
}
}
}
/*.lalala {*/
/*position: relative;*/
/*}*/
.text {
font-size: 14px;
}
.el-tree {
width: 20%;
margin-top: 10px;
}
.search {
width: 20%;
}
.item {
padding: 18px 0;
}
.add {
cursor: pointer;
margin-top: 10px;
}
.delete {
margin: 10px 0;
cursor: pointer;
}
.edit {
margin-bottom: 10px;
cursor: pointer;
}
.search {
cursor: pointer;
}
.box-card {
width: 150px;
position: absolute;
z-index: 1000;
}
</style>到此，相信大家对“vue中怎么使用elementui实现树组件tree右键增删改功能”有了更深的了解，不妨来实际操作一番吧！这里是亿速云网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
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