<template>
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<el-dialog v-model="visible" title="选择产品" width="900px" destroy-on-close :close-on-click-modal="false">
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<el-form :inline="true" :model="query" class="mb-2">
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<el-form-item label="产品分类">
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<el-input v-model="query.productCategory" placeholder="输入产品分类" clearable @keyup.enter="onSearch" />
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</el-form-item>
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<el-form-item label="基本单位">
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<el-input v-model="query.unit" placeholder="输入基本单位" clearable @keyup.enter="onSearch" />
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</el-form-item>
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<el-form-item>
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<el-button type="primary" @click="onSearch">搜索</el-button>
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<el-button @click="columnsDialogVisible = true">列表字段</el-button>
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</el-form-item>
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</el-form>
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<!-- 列表 -->
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<el-table ref="tableRef" v-loading="loading" :data="tableData" height="420" highlight-current-row row-key="id"
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@selection-change="handleSelectionChange" @select="handleSelect">
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<el-table-column type="selection" width="55" />
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<el-table-column type="index" label="序号" width="60" />
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<template v-for="column in visibleColumns" :key="column.prop">
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<el-table-column :prop="column.prop" :label="column.label" :min-width="column.minWidth" show-overflow-tooltip align="center" />
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</template>
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</el-table>
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<div class="mt-3" style="margin-top: 10px;display: flex; justify-content: flex-end;">
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<el-pagination background layout="total, sizes, prev, pager, next, jumper" :total="total"
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v-model:page-size="page.pageSize" v-model:current-page="page.pageNum" :page-sizes="[10, 20, 50, 100]"
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@size-change="onPageChange" @current-change="onPageChange" />
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</div>
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<template #footer>
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<el-button type="primary" :disabled="multipleSelection.length === 0" @click="onConfirm">
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确定
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</el-button>
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<el-button @click="close()">取消</el-button>
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</template>
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</el-dialog>
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<el-dialog v-model="columnsDialogVisible" title="自定义显示列项" width="600px">
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<el-checkbox-group v-model="selectedColumns">
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<el-checkbox v-for="column in allColumns" :key="column.prop" :label="column.prop" :disabled="column.disabled">
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{{ column.label }}
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</el-checkbox>
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</el-checkbox-group>
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<template #footer>
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<el-button @click="resetColumns">恢复默认</el-button>
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<el-button type="primary" @click="saveColumns">保存</el-button>
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</template>
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</el-dialog>
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</template>
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<script setup>
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import { computed, onMounted, reactive, ref, watch, nextTick } from "vue";
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import { ElMessage } from "element-plus";
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const props = defineProps({
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modelValue: Boolean,
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single: Boolean, // 是否只能选择一个，默认false（可选择多个）
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products: {
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type: Array,
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default: () => []
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},
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selectedIds: {
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type: Array,
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default: () => []
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}
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});
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const emit = defineEmits(['update:modelValue', 'confirm']);
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const visible = computed({
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get: () => props.modelValue,
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set: (v) => emit("update:modelValue", v),
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});
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const query = reactive({
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productName: "",
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model: "",
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});
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const page = reactive({
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pageNum: 1,
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pageSize: 10,
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});
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const loading = ref(false);
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const tableData = ref([]);
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const total = ref(0);
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const multipleSelection = ref([]);
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const tableRef = ref();
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const columnsDialogVisible = ref(false);
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const allColumns = ref([
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{ prop: 'productCategory', label: '产品分类', selected: true, disabled: false },
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{ prop: 'unit', label: '基本单位', selected: true, disabled: false },
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]);
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const selectedColumns = ref(allColumns.value.filter(c => c.selected).map(c => c.prop));
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const visibleColumns = computed(() => {
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return allColumns.value.filter(c => selectedColumns.value.includes(c.prop));
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});
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const resetColumns = () => {
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selectedColumns.value = allColumns.value.filter(c => c.selected).map(c => c.prop);
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};
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const saveColumns = () => {
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if (selectedColumns.value.length < 1) {
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ElMessage.warning("列表项显示不得少于1项");
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return;
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}
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columnsDialogVisible.value = false;
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};
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function close() {
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visible.value = false;
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}
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const handleSelectionChange = (val) => {
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if (props.single && val.length > 1) {
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// 如果限制为单个选择，只保留最后一个选中的
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const lastSelected = val[val.length - 1];
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multipleSelection.value = [lastSelected];
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// 清空表格选中状态，然后重新选中最后一个
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nextTick(() => {
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if (tableRef.value) {
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tableRef.value.clearSelection();
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tableRef.value.toggleRowSelection(lastSelected, true);
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}
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});
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} else {
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multipleSelection.value = val;
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}
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}
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// 处理单个选择
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const handleSelect = (selection, row) => {
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if (props.single) {
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// 如果限制为单个，清空其他选择，只保留当前行
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if (selection.includes(row)) {
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// 选中当前行时，清空其他选中
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multipleSelection.value = [row];
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nextTick(() => {
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if (tableRef.value) {
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tableData.value.forEach((item) => {
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if (item.id !== row.id) {
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tableRef.value.toggleRowSelection(item, false);
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}
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});
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}
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});
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}
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}
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}
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function onSearch() {
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page.pageNum = 1;
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loadData();
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}
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function onReset() {
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query.productName = "";
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query.model = "";
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page.pageNum = 1;
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loadData();
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}
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function onPageChange() {
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loadData();
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}
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function onConfirm() {
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if (multipleSelection.value.length === 0) {
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ElMessage.warning("请选择一条产品");
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return;
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}
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if (props.single && multipleSelection.value.length > 1) {
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ElMessage.warning("只能选择一个产品");
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return;
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}
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emit("confirm", props.single ? [multipleSelection.value[0]] : multipleSelection.value);
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close();
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}
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async function loadData() {
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loading.value = true;
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try {
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multipleSelection.value = []; // 翻页/搜索后清空选择更符合预期
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let filtered = props.products || [];
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// 本地搜索过滤
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if (query.productName) {
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filtered = filtered.filter(item => item.productName && item.productName.includes(query.productName));
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}
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if (query.model) {
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filtered = filtered.filter(item => item.model && item.model.includes(query.model));
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}
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total.value = filtered.length;
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// 前端分页
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const start = (page.pageNum - 1) * page.pageSize;
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const end = start + page.pageSize;
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tableData.value = filtered.slice(start, end);
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// 自动回显选中状态
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nextTick(() => {
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if (tableRef.value) {
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tableData.value.forEach(row => {
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if (props.selectedIds && props.selectedIds.includes(row.id)) {
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tableRef.value.toggleRowSelection(row, true);
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}
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});
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}
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});
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} finally {
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loading.value = false;
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}
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}
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// 监听弹窗打开，重置选择
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watch(() => props.modelValue, (visible) => {
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if (visible) {
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// 每次打开时重新初始化选中状态（multipleSelection 会通过 loadData 中的回显逻辑自动更新，但初始需置空避免重复）
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multipleSelection.value = [];
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page.pageNum = 1;
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loadData();
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}
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});
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// 监听数据源变化
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watch(() => props.products, () => {
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loadData();
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}, { deep: true });
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onMounted(() => {
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loadData()
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})
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</script>
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