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| <template>
<virtual-list ref="vls" class="vls-list" :size="vlsSize" :remain="vlsRemain" rtag="div" wclass="vls-list-wrap">
<div class="vls-list-li" :data-key="item[vlsKey]" :key="item[vlsKey]" v-for="(item, index) in vlsDataList">
<slot :item="item" :index="index"></slot>
</div>
</virtual-list>
</template>
<script>
import virtualList from 'vue-virtual-scroll-list';
import Sortable from '../../assets/js/sortablejs.js';
export default {
props: {
dataList: {
type: Array,
default: () => [],
required: true
},
dataKey: {
type: String,
default: 'id',
required: true
},
size: {
type: Number,
default: 30,
},
remain: {
type: Number,
default: 30,
}
},
components: {
virtualList
},
data() {
return {
vlsKey: this.dataKey,
vlsDataList: [...this.dataList],
sortableFlag: false,
sortableInstance: null,
}
},
computed: {
vlsSize() {
return this.size;
},
vlsRemain() {
return this.remain;
}
},
watch: {
dataKey() {
this.vlsKey = this.dataKey;
},
dataList() {
if (this.sortableFlag) return;
this.vlsDataList = this.dataList;
this.$refs.vls.forceRender();
}
},
mounted() {
console.log('this.$refs.vls', this.$refs.vls.$refs.vsl);
this.initSortable(this.$refs.vls.$refs.vsl.querySelector('.vls-list-wrap'));
this.initDrop();
},
beforeDestroy() {
this.destroySortable();
},
methods: {
destroySortable() {
this.sortableInstance && this.sortableInstance.destroy();
this.sortableInstance = null;
},
initSortable(elem) {
if (this.sortableInstance) return;
let elemParentNode = elem.parentNode;
let oldSortIndex = 0;
let newSortIndex = 0;
let related = null;
let willInsertAfter = null;
this.sortableInstance = new Sortable(elem, {
animation: 100,
ghostClass: 'sortable-ghost',
dragClass: 'sortable-drag',
onMove: (evt) => {
this.sortableFlag = true;
related = evt.related;
willInsertAfter = evt.willInsertAfter;
},
onEnd: (evt) => {
if (!related) return;
let dragged = evt.item;
let draggedNid = dragged.getAttribute('data-key');
let relatedNid = related.getAttribute('data-key');
oldSortIndex = this.vlsDataList.findIndex(item => item[this.vlsKey] === draggedNid);
let oldItem = this.vlsDataList.splice(oldSortIndex, 1)[0];
newSortIndex = this.vlsDataList.findIndex(item => item[this.vlsKey] === relatedNid);
if (willInsertAfter) {
newSortIndex = newSortIndex + 1;
}
this.vlsDataList.splice(newSortIndex, 0, oldItem);
console.log('onEnd event===draggedNid=relatedNid=>', draggedNid, relatedNid);
console.log('onEnd event===oldSortIndex=newSortIndex=>', oldSortIndex, newSortIndex);
if (oldSortIndex === newSortIndex) {
return;
}
let elemParentNodeScrollTop = elemParentNode.scrollTop;
const vlsDataListRes = [...this.vlsDataList];
elem.innerHTML = '';
this.vlsDataList = [];
this.$nextTick(() => {
this.sortableFlag = false;
this.$emit('update:data-list', vlsDataListRes);
elemParentNode.scrollTo(0, 0);
this.$nextTick(() => { elemParentNode.scrollTo(0, elemParentNodeScrollTop); });
});
willInsertAfter = null;
related = null;
}
});
},
initDrop() {
document.body.ondrop = function (event) {
event.preventDefault();
event.stopPropagation();
};
},
}
}
</script>
|
