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| <template>
<el-select
ref='selTreeRef'
class="tree-select"
popper-class="tree-opt-box"
v-model='selectId'
:props='defProps'
:multiple="multiple"
:collapseTags="collapseTags"
:clearable="clearable"
:placeholder='placeholder'
@clear='handleClear'
@remove-tag="handleRemoveTag">
<!-- 设置一个空option 不然selectData为空下拉不显示 -->
<el-option hidden value="" label="" key="s1"></el-option>
<el-option hidden v-for="(item, index) in selectData" :value="item[cId]" :label="item[cLabel]" :key="'s2'+index"></el-option>
<el-tree
ref="treeRef"
:data='data'
:show-checkbox="multiple"
:node-key="cId"
:props='defProps'
:expand-on-click-node='false'
:check-on-click-node='true'
@node-click='handleNodeClick'
@check="handCheck"
>
</el-tree>
</el-select>
</template>
<script>
import {cloneDeep, castArray} from 'lodash'
export default {
name: 'TreeSelect',
props: {
defProps: {
type: Object,
default:() => {
return {
children: 'children',
label: 'label',
id: 'id'
}
}
},
value: [String, Number, Object, Array],
multiple: Boolean, // 默认 false
clearable: Boolean, // 默认 false
collapseTags: Boolean, // 默认 false
data: { // tree数据
type: Array,
default: () => {
return []
}
},
placeholder: {
type: String,
default: '请选择'
}
},
data () {
return {
selectId: '',
selectData: [],
cId: this.defProps['id'],
cLabel: this.defProps['label'],
}
},
mounted () {
this.$nextTick(_ => {
if(!this.value) return
this.setDefaultValue(this.value)
})
},
watch: {
value: function (v) {
this.setDefaultValue(v)
}
},
methods: {
/**
* @Description: 返显值
* @param {*} v
* @return {*}
*/
setDefaultValue (v) {
if (this.multiple) {
v = castArray(v)
this.$refs.treeRef.setCheckedKeys(v)
this.handCheckSetValue()
} else {
this.$refs.treeRef.setCurrentKey(v)
this.$nextTick(_ => {
this.handleNodeSetValue()
})
}
},
/**
* @Description: 单选点击事件
* @param {*} data
* @return {*}
*/
handleNodeClick (data) {
if (this.multiple) return
// 隐藏下拉框
this.$refs.selTreeRef.blur()
this.$emit('input', this.handleNodeSetValue())
},
/**
* @Description: 单选设置值
* @param {*}
* @return {*}
*/
handleNodeSetValue () {
let cNode = this.$refs.treeRef.getCurrentNode()
this.selectData = cNode ? [cNode] : []
let val = cNode ? cNode[this.cId] : null
this.selectId = val
return val
},
/**
* @Description: 多选勾选
* @param {*} curNode
* @param {*} checkedNodes
* @return {*}
*/
handCheck (curNode, checkedNodes) {
if (!this.multiple) return
this.$emit('input', this.handCheckSetValue())
},
/**
* @Description: 多选设置值
* @param {*}
* @return {*}
*/
handCheckSetValue () {
this.selectData = cloneDeep(this.$refs.treeRef.getCheckedNodes(true, false))
let val = this.selectData.map(item => item[this.cId])
val = castArray(val)
this.selectId = val
return val
},
/**
* @Description: 清空
* @param {*}
* @return {*}
*/
handleClear () {
this.$emit('input', this.multiple ? [] : null)
},
/**
* @Description: 多选模式移除tag
* @param {*} v
* @return {*}
*/
handleRemoveTag (v) {
this.$emit('input', this.selectId)
}
}
}
</script>
<style lang="scss" scoped>
.tree-select {
/deep/.el-input--medium .el-input__inner {
height: 30px;
line-height: 30px;
border-radius: 6px;
border: 1px solid #eaeaea;
color: #464646;
padding-left: 5px;
&:focus {
border-color: #5587f0;
}
}
/deep/.el-icon-arrow-up:before {
content: '\e78f';
}
/deep/.el-input--medium .el-input__icon {
line-height: 30px;
}
}
.tree-opt-box {
.el-tree {
border-radius: 6px;
color: #464646;
/deep/.el-tree-node__content {
height: 30px;
padding-right: 12px;
}
}
// 隐藏option
.el-select-dropdown__item.selected{
display: none !important;
}
}
</style>
<style lang="scss">
.tree-opt-box {
overflow: hidden !important;
}
</style>
|