<!--
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* @Descripttion:
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* @Author: liu.shiyi
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* @Date: 2023-03-14 10:20:54
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* @LastEditTime: 2023-05-23 15:14:47
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-->
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<template>
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<el-select
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ref="dragSelect"
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v-model="selectVal"
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v-bind="$attrs"
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class="drag-select"
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v-on="$listeners"
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>
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<slot />
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</el-select>
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</template>
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<script>
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import { EventBus } from 'data-room-ui/js/utils/eventBus'
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import Sortable from 'sortablejs'
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export default {
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name: 'DragSelect',
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props: {
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value: {
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type: [Array, String],
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required: true
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}
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},
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computed: {
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selectVal: {
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get () {
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if (Array.isArray(this.value)) {
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return [...this.value]
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} else {
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return this.value
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}
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},
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set (val) {
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if (Array.isArray(val)) {
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this.$emit('input', [...val])
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} else {
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this.$emit('input', val)
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}
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}
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}
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},
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watch: {
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// 监听数组变化，根据上次的数据的值，判断这次拖拽后数据是否变化，如果数据位置发生变化则出发emit事件
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selectVal: {
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handler (newVal, oldVal) {
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if (Array.isArray(newVal) && Array.isArray(oldVal)) {
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if ((newVal.length === oldVal.length) && (JSON.stringify(oldVal) !== JSON.stringify(newVal))) {
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// 告诉右侧的数据配置面板，选择器内的选项顺序发生变化，修改config的数据顺序
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this.$emit('valuePositionChange', newVal)
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}
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}
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}
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}
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},
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created () {
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},
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mounted () {
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this.setSort()
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},
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methods: {
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setSort () {
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const el = this.$refs.dragSelect.$el.querySelectorAll('.el-select__tags > span')[0]
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if (el) {
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this.sortable = Sortable.create(el, {
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animation: 350,
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ghostClass: 'sortable-ghost',
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setData: function (dataTransfer) {
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dataTransfer.setData('Text', '')
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},
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onEnd: (evt) => {
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const targetRow = this.value.splice(evt.oldIndex, 1)[0]
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this.value.splice(evt.newIndex, 0, targetRow)
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}
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})
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}
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}
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}
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}
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</script>
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<style lang="scss" scoped>
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.drag-select {
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::v-deep {
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.sortable-ghost {
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opacity: 0.8;
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color: #fff !important;
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background:var(--bs-el-color-primary) !important;
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}
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.el-tag {
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cursor: move;
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}
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}
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}
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</style>
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