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- <!--
- /**
- * 树形下拉选择组件,下拉框展示树形结构,提供选择某节点功能,方便其他模块调用
- * @author ljn
- * @date 2019-04-02
- * 调用示例:
- * <tree-select :height="400" // 下拉框中树形高度
- * :width="200" // 下拉框中树形宽度
- * size="small" // 输入框的尺寸: medium/small/mini
- * :data="data" // 树结构的数据
- * :defaultProps="defaultProps" // 树结构的props
- * multiple // 多选
- * disabled //禁止
- * onlyleaf //单选时仅叶子可选
- * clearable // 可清空选择
- * collapseTags // 多选时将选中值按文字的形式展示
- * checkStrictly // 多选时,严格遵循父子不互相关联
- * :nodeKey="nodeKey" // 绑定nodeKey,默认绑定'id'
- * :checkedKeys="defaultCheckedKeys" // 传递默认选中的节点key组成的数组
- * @popoverHide="popoverHide"> // 事件有两个参数:第一个是所有选中的节点ID,第二个是所有选中的节点数据
- * </tree-select>
- */
- -->
- <template>
- <div>
- <div v-show="isShowSelect" class="mask" @click="isShowSelect = !isShowSelect" />
- <el-popover
- v-model="isShowSelect"
- :disabled="disabled"
- placement="bottom-start"
- :width="width"
- trigger="manual"
- @hide="popoverHide"
- >
- <el-tree
- ref="tree"
- class="common-tree"
- :style="style"
- :data="data"
- :props="defaultProps"
- :show-checkbox="multiple"
- :node-key="nodeKey"
- :disabled="disabled"
- :check-strictly="checkStrictly"
- :default-expand-all="expandAll"
- :expand-on-click-node="false"
- :check-on-click-node="multiple"
- :highlight-current="true"
- @node-click="handleNodeClick"
- @check-change="handleCheckChange"
- />
- <el-select
- slot="reference"
- ref="select"
- v-model="selectedData"
- :style="selectStyle"
- :size="size"
- :disabled="disabled"
- :placeholder="placeholder"
- :multiple="multiple"
- :clearable="clearable"
- :collapse-tags="collapseTags"
- class="tree-select"
- @click.native="isShowSelect = !isShowSelect"
- @remove-tag="removeSelectedNodes"
- @clear="removeSelectedNode"
- @change="changeSelectedNodes"
- >
- <el-option v-for="item in options" :key="item.value" :label="item.label" :value="item.value" />
- </el-select>
- </el-popover>
- </div>
- </template>
- <script>
- export default {
- name: 'TreeSelect',
- props: {
- // 树结构数据
- data: {
- type: Array,
- default() {
- return []
- }
- },
- defaultProps: {
- type: Object,
- default() {
- return {}
- }
- },
- // 配置是否可多选
- multiple: {
- type: Boolean,
- default() {
- return false
- }
- },
- // 配置是否多选叶子
- onlyleaf: {
- type: Boolean,
- default() {
- return false
- }
- },
- // 配置是否可清空选择
- clearable: {
- type: Boolean,
- default() {
- return false
- }
- },
- disabled: {
- type: Boolean,
- default() {
- return true
- }
- },
- placeholder: {
- type: String,
- default() {
- return '请选择'
- }
- },
- // 配置多选时是否将选中值按文字的形式展示
- collapseTags: {
- type: Boolean,
- default() {
- return false
- }
- },
- // 配置多选时是否将选中值按文字的形式展示
- expandAll: {
- type: Boolean,
- default() {
- return false
- }
- },
- nodeKey: {
- type: String,
- default() {
- return 'id'
- }
- },
- // 显示复选框情况下,是否严格遵循父子不互相关联
- checkStrictly: {
- type: Boolean,
- default() {
- return false
- }
- },
- // 默认选中的节点key数组
- checkedKeys: {
- type: Array,
- default() {
- return []
- }
- },
- size: {
- type: String,
- default() {
- return 'small'
- }
- },
- width: {
- type: Number,
- default() {
- return 250
- }
- },
- height: {
- type: Number,
- default() {
- return 300
- }
- }
- },
- data() {
- return {
- isShowSelect: false, // 是否显示树状选择器
- options: [],
- selectedData: [], // 选中的节点
- style: 'width:' + this.width + 'px;' + 'height:' + this.height + 'px;',
- selectStyle: 'width:' + (this.width + 24) + 'px;',
- checkedIds: [],
- checkedData: []
- }
- },
- watch: {
- isShowSelect(val) {
- // 隐藏select自带的下拉框
- this.$refs.select.blur()
- },
- checkedKeys(val) {
- if (!val) return
- this.checkedKeys = val
- this.initCheckedData()
- }
- },
- mounted() {
- this.initCheckedData()
- },
- methods: {
- // 单选时点击tree节点,设置select选项
- setSelectOption(node) {
- const tmpMap = {}
- tmpMap.value = node.key
- tmpMap.label = node.label
- this.options = []
- this.options.push(tmpMap)
- this.selectedData = node.key
- },
- // 单选,选中传进来的节点
- checkSelectedNode(checkedKeys) {
- var item = checkedKeys[0]
- this.$refs.tree.setCurrentKey(item)
- var node = this.$refs.tree.getNode(item)
- this.setSelectOption(node)
- },
- // 多选,勾选上传进来的节点
- checkSelectedNodes(checkedKeys) {
- this.$refs.tree.setCheckedKeys(checkedKeys)
- },
- // 单选,清空选中
- clearSelectedNode() {
- this.selectedData = ''
- this.$refs.tree.setCurrentKey(null)
- },
- // 多选,清空所有勾选
- clearSelectedNodes() {
- var checkedKeys = this.$refs.tree.getCheckedKeys() // 所有被选中的节点的 key 所组成的数组数据
- for (let i = 0; i < checkedKeys.length; i++) {
- this.$refs.tree.setChecked(checkedKeys[i], false)
- }
- },
- initCheckedData() {
- if (this.multiple) {
- // 多选
- if (this.checkedKeys.length > 0) {
- this.checkSelectedNodes(this.checkedKeys)
- } else {
- this.clearSelectedNodes()
- }
- } else {
- // 单选
- if (this.checkedKeys.length > 0) {
- this.checkSelectedNode(this.checkedKeys)
- } else {
- this.clearSelectedNode()
- }
- }
- },
- popoverHide() {
- if (this.multiple) {
- this.checkedIds = this.$refs.tree.getCheckedKeys() // 所有被选中的节点的 key 所组成的数组数据
- this.checkedData = this.$refs.tree.getCheckedNodes() // 所有被选中的节点所组成的数组数据
- } else {
- this.checkedIds = this.$refs.tree.getCurrentKey()
- this.checkedData = this.$refs.tree.getCurrentNode()
- }
- this.$emit('popoverHide', this.checkedIds, this.checkedData)
- },
- // 单选,节点被点击时的回调,返回被点击的节点数据
- handleNodeClick(data, node) {
- if (!this.onlyleaf || (this.onlyleaf && (data.haschildren === 0 || data.children == undefined))) {
- if (!this.multiple) {
- this.setSelectOption(node)
- this.isShowSelect = !this.isShowSelect
- this.$emit('change', this.selectedData)
- }
- }
- },
- // 多选,节点勾选状态发生变化时的回调
- handleCheckChange() {
- var checkedKeys = this.$refs.tree.getCheckedKeys() // 所有被选中的节点的 key 所组成的数组数据
- this.options = checkedKeys.map((item) => {
- var node = this.$refs.tree.getNode(item) // 所有被选中的节点对应的node
- const tmpMap = {}
- tmpMap.value = node.key
- tmpMap.label = node.label
- return tmpMap
- })
- this.selectedData = this.options.map((item) => {
- return item.value
- })
- this.$emit('change', this.selectedData)
- },
- // 多选,删除任一select选项的回调
- removeSelectedNodes(val) {
- this.$refs.tree.setChecked(val, false)
- var node = this.$refs.tree.getNode(val)
- if (!this.checkStrictly && node.childNodes.length > 0) {
- this.treeToList(node).map(item => {
- if (item.childNodes.length <= 0) {
- this.$refs.tree.setChecked(item, false)
- }
- })
- this.handleCheckChange()
- }
- this.$emit('change', this.selectedData)
- },
- treeToList(tree) {
- var queen = []
- var out = []
- queen = queen.concat(tree)
- while (queen.length) {
- var first = queen.shift()
- if (first.childNodes) {
- queen = queen.concat(first.childNodes)
- }
- out.push(first)
- }
- return out
- },
- // 单选,清空select输入框的回调
- removeSelectedNode() {
- this.clearSelectedNode()
- this.$emit('change', this.selectedData)
- this.popoverHide()
- },
- // 选中的select选项改变的回调
- changeSelectedNodes(selectedData) {
- // 多选,清空select输入框时,清除树勾选
- if (this.multiple && selectedData.length <= 0) {
- this.clearSelectedNodes()
- }
- this.$emit('change', this.selectedData)
- }
- }
- }
- </script>
- <style scoped>
- .mask{
- width: 100%;
- height: 100%;
- position: fixed;
- top: 0;
- left: 0;
- opacity: 0;
- z-index: 11;
- }
- .common-tree{
- overflow: auto;
- }
- /* .tree-select{
- z-index: 111;
- } */
- </style>
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