JAreaLinkage.vue
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<template>
<div class="j-area-linkage">
<div v-if="reloading">
<span> Reloading... </span>
</div>
<area-cascader
v-else-if="_type === enums.type[0]"
:value="innerValue"
:data="pcaa"
:level="1"
:style="{width}"
v-bind="$attrs"
v-on="_listeners"
@change="handleChange"
/>
<area-select
v-else-if="_type === enums.type[1]"
:value="innerValue"
:data="pcaa"
:level="2"
v-bind="$attrs"
v-on="_listeners"
@change="handleChange"
/>
<div v-else>
<span style="color:red;"> Bad type value: {{ _type }}</span>
</div>
</div>
</template>
<script>
import Area from '@/components/_util/Area'
export default {
name: 'JAreaLinkage',
props: {
value: {
type: String,
required: false
},
// 组件的类型，可选值：
// select 下拉样式
// cascader 级联样式（默认）
type: {
type: String,
default: 'cascader'
},
width: {
type: String,
default: '100%'
}
},
data() {
return {
pcaa: this.$Jpcaa,
innerValue: [],
usedListeners: ['change'],
enums: {
type: ['cascader', 'select']
},
reloading: false,
areaData: ''
}
},
computed: {
_listeners() {
let listeners = {...this.$listeners}
// 去掉已使用的事件，防止冲突
this.usedListeners.forEach(key => {
delete listeners[key]
})
return listeners
},
_type() {
if (this.enums.type.includes(this.type)) {
return this.type
} else {
console.error(`JAreaLinkage的type属性只能接收指定的值（${this.enums.type.join('|')}）`)
return this.enums.type[0]
}
},
},
watch: {
value: {
immediate: true,
handler() {
this.loadDataByValue(this.value)
}
},
},
created() {
this.initAreaData();
},
methods: {
/** 重新加载组件 */
reload() {
this.reloading = true
this.$nextTick(() => this.reloading = false)
},
/** 通过 value 反推 options */
loadDataByValue(value) {
if (!value || value.length === 0) {
this.innerValue = []
} else {
this.initAreaData()
let arr = this.areaData.getRealCode(value)
this.innerValue = arr
}
this.reload()
},
/** 通过地区code获取子级 */
loadDataByCode(value) {
let options = []
let data = this.pcaa[value]
if (data) {
for (let key in data) {
if (data.hasOwnProperty(key)) {
options.push({value: key, label: data[key],})
}
}
return options
} else {
return []
}
},
/** 判断是否有子节点 */
hasChildren(options) {
options.forEach(option => {
let data = this.loadDataByCode(option.value)
option.isLeaf = data.length === 0
})
},
handleChange(values) {
let value = values[values.length - 1]
this.$emit('change', value)
},
initAreaData() {
if (!this.areaData) {
this.areaData = new Area(this.$Jpcaa);
}
},
},
model: {prop: 'value', event: 'change'},
}
</script>
<style lang="less" scoped>
.j-area-linkage {
height: 40px;
/deep/ .area-cascader-wrap .area-select {
width: 100%;
}
/deep/ .area-select .area-selected-trigger {
line-height: 1.15;
}
}
</style>