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<template>
<a-tree-select
allowClear
labelInValue
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:getPopupContainer="(node) => node.parentNode"
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style="width: 100%"
:disabled="disabled"
:dropdownStyle="{ maxHeight: '400px', overflow: 'auto' }"
:placeholder="placeholder"
:loadData="asyncLoadTreeData"
:value="treeValue"
:treeData="treeData"
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:multiple="multiple"
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@change="onChange"
@search="onSearch">
</a-tree-select>
</template>
<script>
/*
* 异步树加载组件 通过传入表名 显示字段 存储字段 加载一个树控件
* <j-tree-select dict="aa_tree_test,aad,id" pid-field="pid" ></j-tree-select>
* */
import { getAction } from '@/api/manage'
export default {
name: 'JTreeSelect',
props: {
value:{
type: String,
required: false
},
placeholder:{
type: String,
default: '请选择',
required: false
},
dict:{
type: String,
default: '',
required: false
},
pidField:{
type: String,
default: 'pid',
required: false
},
pidValue:{
type: String,
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default: '',
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required: false
},
disabled:{
type:Boolean,
default:false,
required:false
},
hasChildField:{
type: String,
default: '',
required: false
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},
condition:{
type:String,
default:'',
required:false
},
// 是否支持多选
multiple: {
type: Boolean,
default: false,
},
loadTriggleChange:{
type: Boolean,
default: false,
required:false
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}
},
data () {
return {
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treeValue: null,
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treeData:[],
url:"/sys/dict/loadTreeData",
view:'/sys/dict/loadDictItem/',
tableName:"",
text:"",
code:"",
}
},
watch: {
value () {
this.loadItemByCode()
},
dict(){
this.initDictInfo()
this.loadRoot();
}
},
created(){
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this.validateProp().then(()=>{
this.initDictInfo()
this.loadRoot()
this.loadItemByCode()
})
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},
methods: {
loadItemByCode(){
if(!this.value || this.value=="0"){
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this.treeValue = null
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}else{
getAction(`${this.view}${this.dict}`,{key:this.value}).then(res=>{
if(res.success){
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let values = this.value.split(',')
this.treeValue = res.result.map((item, index) => ({
key: values[index],
value: values[index],
label: item
}))
this.onLoadTriggleChange(res.result[0]);
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}
})
}
},
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onLoadTriggleChange(text){
//只有单选才会触发
if(!this.multiple && this.loadTriggleChange){
this.$emit('change', this.value,text)
}
},
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initDictInfo(){
let arr = this.dict.split(",")
this.tableName = arr[0]
this.text = arr[1]
this.code = arr[2]
},
asyncLoadTreeData (treeNode) {
return new Promise((resolve) => {
if (treeNode.$vnode.children) {
resolve()
return
}
let pid = treeNode.$vnode.key
let param = {
pid:pid,
tableName:this.tableName,
text:this.text,
code:this.code,
pidField:this.pidField,
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hasChildField:this.hasChildField,
condition:this.condition
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}
getAction(this.url,param).then(res=>{
if(res.success){
for(let i of res.result){
i.value = i.key
if(i.leaf==false){
i.isLeaf=false
}else if(i.leaf==true){
i.isLeaf=true
}
}
this.addChildren(pid,res.result,this.treeData)
this.treeData = [...this.treeData]
}
resolve()
})
})
},
addChildren(pid,children,treeArray){
if(treeArray && treeArray.length>0){
for(let item of treeArray){
if(item.key == pid){
if(!children || children.length==0){
item.isLeaf=true
}else{
item.children = children
}
break
}else{
this.addChildren(pid,children,item.children)
}
}
}
},
loadRoot(){
let param = {
pid:this.pidValue,
tableName:this.tableName,
text:this.text,
code:this.code,
pidField:this.pidField,
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hasChildField:this.hasChildField,
condition:this.condition
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}
getAction(this.url,param).then(res=>{
if(res.success && res.result){
for(let i of res.result){
i.value = i.key
if(i.leaf==false){
i.isLeaf=false
}else if(i.leaf==true){
i.isLeaf=true
}
}
this.treeData = [...res.result]
}else{
console.log("数根节点查询结果-else",res)
}
})
},
onChange(value){
if(!value){
this.$emit('change', '');
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this.treeValue = null
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} else if (value instanceof Array) {
this.$emit('change', value.map(item => item.value).join(','))
this.treeValue = value
} else {
this.$emit('change', value.value,value.label)
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this.treeValue = value
}
},
onSearch(value){
console.log(value)
},
getCurrTreeData(){
return this.treeData
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},
validateProp(){
let mycondition = this.condition
return new Promise((resolve,reject)=>{
if(!mycondition){
resolve();
}else{
try {
let test=JSON.parse(mycondition);
if(typeof test == 'object' && test){
resolve()
}else{
this.$message.error("组件JTreeSelect-condition传值有误，需要一个json字符串!")
reject()
}
} catch(e) {
this.$message.error("组件JTreeSelect-condition传值有误，需要一个json字符串!")
reject()
}
}
})
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}
},
//2.2新增 在组件内定义 指定父组件调用时候的传值属性和事件类型 这个牛逼
model: {
prop: 'value',
event: 'change'
}
}
</script>
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