<template>
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<div>
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<div class="mask" v-show="isShowSelect" @click="isShowSelect = !isShowSelect"></div>
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<el-popover placement="bottom-start" :width="width" trigger="manual" v-model="isShowSelect" @hide="popoverHide">
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<el-select
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slot="reference"
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ref="select"
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:size="size"
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v-model="selectedData"
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:multiple="multiple"
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:clearable="clearable"
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:collapse-tags="collapseTags"
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@click.native="isShowSelect = !isShowSelect"
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@remove-tag="removeSelectedNodes"
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@clear="removeSelectedNode"
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@change="changeSelectedNodes"
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class="tree-select"
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>
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<el-option v-for="item in options" :key="item.value" :label="item.label" :value="item.value" />
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</el-select>
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<el-tree
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class="common-tree"
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ref="tree"
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:style="`width: 100%; ${height}px`"
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:data="data"
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:props="defaultProps"
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:show-checkbox="multiple"
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:node-key="nodeKey"
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:check-strictly="checkStrictly"
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default-expand-all
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:expand-on-click-node="false"
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:check-on-click-node="multiple"
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:highlight-current="true"
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@node-click="handleNodeClick"
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@check-change="handleCheckChange"
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/>
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</el-popover>
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</div>
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</template>
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<script>
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export default {
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name: 'tree-select',
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props: {
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// 树结构数据
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data: {
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type: Array,
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default() {
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return [];
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}
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},
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defaultProps: {
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type: Object,
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default() {
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return {};
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}
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},
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// 配置是否可多选
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multiple: {
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type: Boolean,
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default() {
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return false;
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}
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},
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// 配置是否可清空选择
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clearable: {
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type: Boolean,
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default() {
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return false;
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}
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},
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// 配置多选时是否将选中值按文字的形式展示
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collapseTags: {
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type: Boolean,
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default() {
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return false;
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}
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},
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nodeKey: {
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type: String,
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default() {
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return 'id';
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}
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},
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// 显示复选框情况下，是否严格遵循父子不互相关联
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checkStrictly: {
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type: Boolean,
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default() {
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return false;
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}
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},
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// 默认选中的节点key数组
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checkedKeys: {
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type: Array,
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default() {
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return [];
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}
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},
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size: {
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type: String,
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default() {
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return 'small';
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}
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},
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width: {
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type: Number,
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default() {
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return 250;
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}
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},
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height: {
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type: Number,
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default() {
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return 300;
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}
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}
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},
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data() {
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return {
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isShowSelect: false, // 是否显示树状选择器
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options: [],
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selectedData: [], // 选中的节点
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style: 'width:' + this.width + 'px;' + 'height:' + this.height + 'px;',
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selectStyle: 'width:' + (this.width + 24) + 'px;',
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checkedIds: [],
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checkedData: []
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};
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},
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mounted() {
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this.initCheckedData();
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},
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methods: {
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// 单选时点击tree节点，设置select选项
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setSelectOption(node) {
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let tmpMap = {};
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tmpMap.value = node.key;
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tmpMap.label = node.label;
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this.options = [];
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this.options.push(tmpMap);
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this.selectedData = node.key;
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},
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// 单选，选中传进来的节点
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checkSelectedNode(checkedKeys) {
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var item = checkedKeys[0];
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this.$refs.tree.setCurrentKey(item);
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var node = this.$refs.tree.getNode(item);
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this.setSelectOption(node);
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},
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// 多选，勾选上传进来的节点
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checkSelectedNodes(checkedKeys) {
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this.$refs.tree.setCheckedKeys(checkedKeys);
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},
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// 单选，清空选中
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clearSelectedNode() {
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this.$refs.tree.setCurrentKey(null);
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},
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// 多选，清空所有勾选
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clearSelectedNodes() {
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var checkedKeys = this.$refs.tree.getCheckedKeys(); // 所有被选中的节点的 key 所组成的数组数据
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for (let i = 0; i < checkedKeys.length; i++) {
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this.$refs.tree.setChecked(checkedKeys[i], false);
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}
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},
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initCheckedData() {
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if (this.multiple) {
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// 多选
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if (this.checkedKeys.length > 0) {
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this.selectedData = this.checkedKeys;
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this.checkSelectedNodes(this.checkedKeys);
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} else {
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this.selectedData = '';
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this.clearSelectedNodes();
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}
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} else {
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// 单选
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if (this.checkedKeys.length > 0) {
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this.selectedData = this.checkedKeys[0];
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this.checkSelectedNode(this.checkedKeys);
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} else {
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this.selectedData = '';
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this.clearSelectedNode();
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}
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}
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},
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a2b(ls) {
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return ls.map(obj => {
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let result = { id: '', text: '' };
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if (obj.children && obj.children.length > 0) {
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result.id = obj.value;
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result.text = obj.label;
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result.arr = a2b(obj.children);
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return result;
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} else {
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result.id = obj.value;
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result.text = obj.label;
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return result;
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}
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});
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},
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popoverHide() {
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if (this.multiple) {
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this.checkedIds = this.$refs.tree.getCheckedKeys(); // 所有被选中的节点的 key 所组成的数组数据
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this.checkedData = this.$refs.tree.getCheckedNodes(); // 所有被选中的节点所组成的数组数据
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} else {
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this.checkedIds = this.$refs.tree.getCurrentKey();
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this.checkedData = this.$refs.tree.getCurrentNode();
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}
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this.$emit('checked-change', this.checkedIds, this.checkedData);
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},
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// 单选，节点被点击时的回调,返回被点击的节点数据
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handleNodeClick(data, node) {
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if (!this.multiple) {
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this.setSelectOption(node);
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this.isShowSelect = !this.isShowSelect;
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this.$emit('change', this.selectedData);
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}
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},
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// 多选，节点勾选状态发生变化时的回调
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handleCheckChange() {
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var checkedKeys = this.$refs.tree.getCheckedKeys(); // 所有被选中的节点的 key 所组成的数组数据
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this.options = checkedKeys.map((item) => {
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var node = this.$refs.tree.getNode(item); // 所有被选中的节点对应的node
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let tmpMap = {};
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tmpMap.value = node.key;
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tmpMap.label = node.label;
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return tmpMap;
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});
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this.selectedData = this.options.map((item) => {
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return item.value;
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});
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this.$emit('change', this.selectedData);
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},
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// 多选,删除任一select选项的回调
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removeSelectedNodes(val) {
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this.$refs.tree.setChecked(val, false);
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var node = this.$refs.tree.getNode(val);
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if (!this.checkStrictly && node.childNodes.length > 0) {
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this.treeToList(node).map(item => {
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if (item.childNodes.length <= 0) {
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this.$refs.tree.setChecked(item, false);
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}
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});
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this.handleCheckChange();
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}
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this.$emit('change', this.selectedData);
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},
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treeToList(tree) {
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var queen = [];
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var out = [];
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queen = queen.concat(tree);
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while (queen.length) {
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var first = queen.shift();
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if (first.childNodes) {
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queen = queen.concat(first.childNodes);
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}
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out.push(first);
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}
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return out;
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},
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// 单选,清空select输入框的回调
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removeSelectedNode() {
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this.clearSelectedNode();
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this.$emit('change', this.selectedData);
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},
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// 选中的select选项改变的回调
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changeSelectedNodes(selectedData) {
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// 多选,清空select输入框时，清除树勾选
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if (this.multiple && selectedData.length <= 0) {
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this.clearSelectedNodes();
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}
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this.$emit('change', this.selectedData);
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}
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},
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watch: {
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isShowSelect(val) {
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// 隐藏select自带的下拉框
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this.$refs.select.blur();
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},
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checkedKeys(val) {
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if (!val) return;
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this.checkedKeys = val;
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this.initCheckedData();
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}
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}
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};
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</script>
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<style scoped>
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.mask {
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width: 100%;
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height: 100%;
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position: fixed;
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top: 0;
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left: 0;
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opacity: 0;
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z-index: 11;
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}
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.common-tree {
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overflow: auto;
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}
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.tree-select {
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z-index: 111;
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}
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</style>
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