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index.vue
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<template>
<div @click.stop="open" :class="['picker-select-input', {'disabled': readonly}]">
{{displayValue}}
<div class="picker-select-space" v-if="!displayValue && !readonly">
<span>请选择</span><!--
--><img class="picker-anchor-icon" src="../../assets/arrow-go-right.svg" alt="">
</div>
</div>
</template>
<script type="text/babel">
import Vue from 'vue';
import SelectComponent from './select.vue';
import { pageScroll } from './util.js';
export default {
name: 'w-select',
data() {
return {
select: null,
diffValue: this.value,
tmpNum: 0,
displayValue: ''
}
},
props: {
columns: {
type: Array,
},
items: {
type: Object,
},
readonly: {
type: Boolean,
default: false
},
value: {
type: Object,
default: () => {}
}
},
watch: {
columns(val, oldVal) {
},
items(val, oldVal){
}
},
methods: {
open() {
if (this.readonly) return;
this.select.open();
},
close() {
this.select.close();
},
removeElement() {
if (this.select && this.select.$el) document.body.removeChild(this.select.$el);
},
setDisplayText() {
// 处理选中后展示的文案
let result = [];
let valueR = {}
this.columns.length && this.columns.forEach((key,i) => {
let arr = this.items[key];
arr && arr.forEach(item => {
if(item.value == this.diffValue[key]){
result.push(item.name);
valueR[key] = item.value;
}
})
if (!this.diffValue[key] && arr[0]) {
result.push(arr[0].name);
valueR[key] = arr[0].value;
}
this.$emit('input', valueR);
})
this.displayValue = result.join(' ')
},
render() {
this.removeElement();
// 把picker组件放入body中
const Select = Vue.extend(SelectComponent);
const props = this._props;
props.parentEL = this.$el;
this.select = new Select({
el: document.createElement('div'),
data: props
});
document.body.appendChild(this.select.$el);
// confirm监听, emit input
this.select.$on('confirm', (value) => {
if (this.tmpNum > 0 || this.initEmit) {
this.diffValue = value
this.setDisplayText();
// this.$emit('input', value);
}
this.tmpNum++;
});
// change监听 emit change
this.select.$on('change', (value) => {
this.$emit('change', value);
});
},
updateColumn(column, scrollValue) {
// 更新列表, emit change
let allData = this.items[column];
let scrollIndex = 0
if(allData && allData.length > 0){
allData.forEach((item, i) => {
if (item.value === scrollValue) {
scrollIndex = i
}
})
this.$nextTick(() => {
this.select.scrolloToPosition(column, scrollIndex, allData, (value)=>{
this.$emit('change', {
column,
value
});
this.diffValue[column] = value
Object.values(this.value)[0] && this.setDisplayText()
})
})
}
}
},
mounted() {
this.render();
Object.values(this.value)[0] && this.setDisplayText();
},
beforeDestroy() {
pageScroll.unlock();
this.removeElement();
}
}
</script>
<style lang="less">
@import './select.less';
</style>