//html代码 <div class="dialog-tree"> <el-tree :data="templateLexiconData" :props="templateLexiconProps" node-key="Id" draggable :key="tree_key" :render-content="renderContent" :default-expanded-keys="defaultExpand" @node-click="reportTemplateTreeClick" :expand-on-click-node="false" :allow-drop="collapse" @node-drop="sort" v-loading="loading" ></el-tree> </div>
//js代码 // 结构树操作group node, renderContent(h, { node, data, store }) { return ( <span class="el-tree-span" on-mouseenter={() => this.mouseenteract(data)} on-mouseleave={() => this.mouseleaveact(data)} > <span class="el-tree-font">{data.Name}</span> {this.isact == data ? ( <span class="tree_node_op"> <i class="el-icon-upload2" style="font-size:12px" v-show="data.show" on-click={() => this.nodeUp(node, data)} > 置顶 </i> </span> ) : ( <span></span> )} </span> ); }, // 树节点鼠标移入移出 mouseenteract(da) { this.isact = da; }, mouseleaveact(da) { this.isact = ""; }, //置顶 nodeUp(node, data) { const nextLabel = node.label; const parent = node.parent; const children = parent.data.Children || parent.data; const cIndex = children.findIndex(d => d.Id === data.Id); if (parent.level === 0 && cIndex === 0) { this.$message.warning("已经排序第一的不能再置顶!"); } else if (parent.level !== 0 && cIndex === 0) { this.$message.warning("已经排序第一的不能再置顶!"); } else if ( (parent.level === 0 && cIndex !== 0) || (parent.level !== 0 && cIndex !== 0) ) { const tempChildrenNodex1 = children[0]; const tempChildrenNodex2 = children[cIndex]; this.$set(children, 0, tempChildrenNodex2); this.$set(children, cIndex, tempChildrenNodex1); if (typeof parent.label != "undefined") { this.defaultExpand[0] = parent.label; } const _newsList = []; const _data = node.level == 1 ? node.parent.data : node.parent.data.Children; _data.forEach((item, index) => { _newsList.push({ TName: item.Name, TSearchId: index + 1 }); }); const types = 2; this.getSetorderData(node, data, nextLabel, _newsList, types); //接口传值,根据自己的需求来 } this.tree_key++; }, //拖拽判断 collapse(draggingNode, dropNode, type) { if (draggingNode.level === dropNode.level) { if (draggingNode.parent.id === dropNode.parent.id) { // 向上拖拽 || 向下拖拽 return type === "prev" || type === "next"; } } else { // 不同级进行处理 return false; } }, //拖拽后 sort(node, data, type) { const nextLabel = node.label; const dataArr = data.parent.childNodes; let cIndex = 0; let id = 0; let orderArrOld = JSON.parse(JSON.stringify([...data.parent.data])); let orderArr = [...data.parent.data]; orderArr.forEach((item, index) => { item.Order = index + 1; }); orderArr = orderArr.filter((item, index) => { console.log(item.Order !== orderArrOld[index].Order); if (item.Order !== orderArrOld[index].Order) return item; }); const _node = data.parent.childNodes; const _length = _node.length - id; const _list = _node.slice(-_length); const _newsList = []; _list.forEach((item, index) => { _newsList.push({ TName: item.label, TSearchId: cIndex + index + 1 }); }); const types = 1; this.getSetorderData(node, data, nextLabel, _newsList, types); //接口传值,根据自己的需求来 }
javascript如何利用draggable实现一个拖拽效果
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