최종 효과:
캡슐화된 하위 구성요소 이름 selectTree.vue
<template>
<el-select :value="valueTitle" :disabled="disabled" :clearable="clearable" @clear="clearHandle">
<el-option :value="valueTitle" :label="valueTitle">
<el-tree id="tree-option" ref="selectTree" :accordion="accordion" :data="options" :props="props"
:node-key="props.value" :default-expanded-keys="defaultExpandedKey" @node-click="handleNodeClick">
</el-tree>
</el-option>
</el-select>
</template>
<script>
export default {
name: 'ebs-tree-select',
props: {
/* 配置项 */
props: {
type: Object,
default: () => {
return {
value: 'id', // ID字段名
label: 'title', // 显示名称
children: 'children' // 子级字段名
}
}
},
/* 选项列表数据(树形结构的对象数组) */
options: {
type: Array,
default: () => { return [] }
},
/* 初始值 */
value: {
type: String,
default: () => { return null }
},
/* 可清空选项 */
clearable: {
type: Boolean,
default: () => { return true }
},
/* 自动收起 */
accordion: {
type: Boolean,
default: () => { return false }
},
disabled: {
type: Boolean,
default: () => { return false }
}
},
data() {
return {
valueId: this.value, // 初始值
valueTitle: '',
defaultExpandedKey: []
}
},
mounted() {
this.initHandle()
},
methods: {
// 初始化值
initHandle() {
// alert('this.valueId=' + this.valueId)
let that = this
// 这里要延迟执行,否则有BUG
setTimeout(function () {
if (that.valueId) {
that.valueTitle = that.$refs.selectTree.getNode(that.valueId).data[that.props.label] // 初始化显示
that.$refs.selectTree.setCurrentKey(that.valueId) // 设置默认选中
that.defaultExpandedKey = [that.valueId] // 设置默认展开
} else {
that.valueTitle = null // 初始化显示
that.$refs.selectTree.setCurrentKey(null) // 设置默认选中
}
}, 200)
this.$nextTick(() => {
let scrollWrap = document.querySelectorAll('.el-scrollbar .el-select-dropdown__wrap')[0]
let scrollBar = document.querySelectorAll('.el-scrollbar .el-scrollbar__bar')
scrollWrap.style.cssText = 'margin: 0px; max-height: none; overflow: hidden;'
scrollBar.forEach(ele => ele.style.width = 0)
})
},
// 切换选项
handleNodeClick(node) {
this.valueTitle = node[this.props.label]
this.valueId = node[this.props.value]
//this.$emit('getValue',this.valueId)
this.$emit('input', this.valueId)
this.defaultExpandedKey = []
},
// 清除选中
clearHandle() {
this.valueTitle = ''
this.valueId = null
this.defaultExpandedKey = []
this.clearSelected()
//this.$emit('getValue',null)
this.$emit('input', null)
},
/* 清空选中样式 */
clearSelected() {
let allNode = document.querySelectorAll('#tree-option .el-tree-node')
allNode.forEach((element) => element.classList.remove('is-current'))
}
},
watch: {
value() {
this.valueId = this.value
this.initHandle()
}
}
}
</script>
<style scoped>
.el-scrollbar .el-scrollbar__view .el-select-dropdown__item {
height: auto;
max-height: 274px;
padding: 0;
overflow: hidden;
overflow-y: auto;
}
.el-select-dropdown__item.selected {
font-weight: normal;
}
ul li>>>.el-tree .el-tree-node__content {
height: auto;
padding: 0 20px;
}
.el-tree-node__label {
font-weight: normal;
}
.el-tree>>>.is-current .el-tree-node__label {
color: #409EFF;
font-weight: 700;
}
.el-tree>>>.is-current .el-tree-node__children .el-tree-node__label {
color: #606266;
font-weight: normal;
}
</style>
상위 구성 요소 참조
<template>
<div>
<!-- 禁用v-bind:disabled="isView" -->
<selectTree :props="treeSelectProps" v-model="queryParams2.sceneName" :options="catTreeData">
</selectTree>
</div>
</template>
<script>
import selectTree from '../../../components/selectTree/selectTree';
export default {
name: "Merchant",
components: {
selectTree
},
data() {
return {
treeSelectProps: {
value: 'key', // ID字段名
label: 'sceneName', // 显示名称
children: 'children' // 子级字段名
},
catTreeData: [
{
"key": "1462626865326317569",
"sceneName": "基础管理",
"parentId": "1462626811047829505",
"value": null,
"code": "B03A01",
"children": null,
"leaf": true
},
{
"key": "1462626933466980354",
"sceneName": "在线开发",
"parentId": "1462626811047829505",
"value": null,
"code": "B03A02",
"children": [
{
"key": "1462627031668219905",
"sceneName": "表单开发",
"parentId": "1462626933466980354",
"value": null,
"code": "B03A02A01",
"children": null,
"leaf": true
},
{
"key": "1462627069307904002",
"sceneName": "报表配置",
"parentId": "1462626933466980354",
"value": null,
"code": "B03A02A02",
"children": null,
"leaf": true
}
],
"leaf": false
}
],
}
};
</script>
<style scoped>
.main-select-el-tree .el-tree-node .is-current>.el-tree-node__content {
font-weight: bold;
color: #409eff;
}
.main-select-el-tree .el-tree-node.is-current>.el-tree-node__content {
font-weight: bold;
color: #409eff;
}
</style>