feat:默认选中

src/components/TreeMultipleSelect/index.vue

@@ -0,0 +1,159 @@
+<template>
+	<div class="el-tree-select">
+		<el-tree-select
+			v-model="state.selectIdList"
+			id="tree-option"
+			ref="selectTree"
+			:accordion="true"
+			:data="state.options"
+			:props="state.objMap"
+			:node-key="state.objMap.value"
+			:expand-on-click-node="true"
+			:default-expanded-keys="defaultExpandedKey"
+			:filter-node-method="filterNode"
+			@node-click="handleNodeClick"
+			@check="handleCheck"
+			@visible-change="(e) => e && getOptions()"
+			clearable
+			highlight-current
+			default-expand-all
+			show-checkbox
+			collapse-tags
+			multiple
+		/>
+	</div>
+</template>
+
+<script setup name="TreeMultipleSelect">
+import { deptTree } from "/@/api/admin/dept"
+const { proxy } = getCurrentInstance()
+
+const selectIdList = defineModel()
+
+const state = reactive({
+	objMap: {
+		value: "id",
+		label: "name",
+		children: "children",
+	},
+	selectIdList: selectIdList,
+	loading: false,
+	options: [],
+	checkedTreeNodes: [],
+})
+
+watch(
+	selectIdList,
+	(newVal, oldValue) => {
+		if (newVal == oldValue) return
+		state.selectIdList = newVal
+		getOptions()
+	},
+	{ immediate: true },
+)
+
+const emit = defineEmits(["update:value"])
+
+const valueTitle = ref("")
+const defaultExpandedKey = ref([])
+
+/**
+ * 初始化下拉菜单选择器的默认值，并设置默认选中和默认展开。
+ */
+function initHandle() {
+	nextTick(() => {
+		const selectedValue = selectIdList.value
+		if (selectedValue !== null && typeof selectedValue !== "undefined") {
+			const node = proxy.$refs.selectTree.getNode(selectedValue)
+			if (node) {
+				valueTitle.value = node.data[state.objMap.label]
+				proxy.$refs.selectTree.setCurrentKey(selectedValue) // 设置默认选中
+				defaultExpandedKey.value = [selectedValue] // 设置默认展开
+			}
+		} else {
+			clearHandle()
+		}
+	})
+}
+
+/**
+ * 点击某一节点时触发的事件，更新当前的选中值和展开状态。
+ * @param {Object} node - 被点击的节点对象
+ */
+function handleNodeClick(node) {
+	valueTitle.value = node[state.objMap.label]
+	selectIdList.value = node[state.objMap.value]
+	defaultExpandedKey.value = []
+	proxy.$refs.treeSelect.blur()
+	selectFilterData("")
+}
+
+/**
+ * 勾选树节点时
+ */
+const handleCheck = (data, checkStatus) => {
+	const { checkedNodes } = checkStatus
+	state.checkedTreeNodes = checkedNodes
+	if (state.checkedTreeNodes.length > 0) {
+		state.switch = false
+	}
+	let deptIds = []
+	if (state.checkedTreeNodes && state.checkedTreeNodes.length) {
+		deptIds = state.checkedTreeNodes.map((v) => v[state.objMap.value])
+	}
+	state.selectIdList = deptIds
+}
+
+/**
+ * 搜索过滤函数，根据输入的值来过滤显示的节点。
+ * @param {String} val - 输入框内的搜索关键字
+ */
+function selectFilterData(val) {
+	proxy.$refs.selectTree.filter(val)
+}
+
+/**
+ * 根据输入的值来判断节点是否需要显示。
+ * @param {String} value - 输入框内的搜索关键字
+ * @param {Object} data - 当前处理的节点数据
+ * @returns {Boolean} - 是否需要显示此节点
+ */
+function filterNode(value, data) {
+	if (!value) return true
+	return data[state.objMap["label"]].indexOf(value) !== -1
+}
+/**
+ * 清空当前的选中状态，并重置展开状态。
+ */
+function clearHandle() {
+	valueTitle.value = ""
+	valueId.value = ""
+	defaultExpandedKey.value = []
+	clearSelected()
+}
+/**
+ * 删除所有选中状态的节点。
+ */
+function clearSelected() {
+	const allNode = document.querySelectorAll("#tree-option .el-tree-node")
+	allNode.forEach((element) => element.classList.remove("is-current"))
+}
+
+/**
+ * 获取数据
+ */
+async function getOptions() {
+	try {
+		state.loading = true
+		const _pa = {}
+		const { data } = await deptTree(_pa)
+		state.options = data
+	} finally {
+		setTimeout(() => (state.loading = false), 500)
+	}
+}
+</script>
+
+<style lang="scss" scoped>
+@import "/@/assets/styles/variables.module.scss";
+</style>