做设计有必要买素材网站会员吗网络营销题库案例题

Vue.js的组件库Ant Design Vue Select 选择器没有全选功能，如下图所示：

在项目中，我们自己实现了全选和清空功能，如下所示：

代码如下所示：

<!--
=========================================================
* 参数配置 - 风力发电 - 曲线图
* 猴王软件学院 - 大强
* 2025-3-23
=========================================================
-->
<template><div><div class="flex-container"><div class="flex-item"><a-selectid="a-select-scene":options="options_scene"mode="combobox"style="width: 200px; height:50px;"@change="proChange_scene"showArrow="true"placeholder="请选择场景"v-model="selected_scene"></a-select></div><div class="flex-item"><a-selectid="a-select-node":options="options_node"mode="multiple"style="width: 200px; height:50px;"@change="proChange_node"showArrow="true"v-model:value="selected_node"><template #dropdownRender="{ menuNode: menu }"><div><a-button @click="allSelectedFun" type="primary" style="margin-right: 10px;">全选</a-button><a-button @click="clearFun">清空</a-button><a-divider style="margin: 5px 0;" /><v-nodes :vnodes="menu" /></div></template></a-select><div class="my-ant-select-selection-placeholder">请选择节点</div></div><div class="flex-item"><a-selectid="a-select-power":options="options_power"mode="combobox"style="width: 200px; height:50px;"@change="proChange_power"showArrow="true"placeholder="请选择功率"v-model="selected_power"></a-select></div><div class="flex-item"><a-button type="primary" preIcon="ant-design:search-outlined" @click="searchChart">查看</a-button></div></div><div ref="chartRef" :style="{ height, width }"></div></div>
</template>
<script lang="ts">
import {defineComponent, PropType, ref, Ref, reactive, watchEffect, unref, onMounted} from 'vue';
import {useECharts} from '/@/hooks/web/useECharts';
import {cloneDeep} from 'lodash-es';
import {Select} from "ant-design-vue";
import {initDictOptions} from "@/utils/dict";export default defineComponent({name: 'LineMulti',components: {Select,VNodes: (_, { attrs }) => {return attrs.vnodes;},},props: {chartData: {type: Array,default: () => [],required: true,},option: {type: Object,default: () => ({}),},type: {type: String as PropType<string>,default: 'line',},width: {type: String as PropType<string>,default: '100%',},height: {type: String as PropType<string>,default: 'calc(100vh - 78px)',},},emits: ['click'],setup(props, {emit}) {const chartRef = ref<HTMLDivElement | null>(null);const {setOptions, getInstance} = useECharts(chartRef as Ref<HTMLDivElement>);const option = reactive({tooltip: {trigger: 'axis',axisPointer: {type: 'shadow',label: {show: true,backgroundColor: '#333',},},},legend: {top: 30,},grid: {top: 60,},xAxis: {name: '时间（小时）',type: 'category',data: [],},yAxis: {name: '功率（万千瓦）',type: 'value',},series: [],});// 功率let options_power = ref<any>([]);let selected_power = ref('');// 场景let options_scene = ref<any>([]);let selected_scene = ref('');// 节点let options_node = ref<any>([]);// let selected_node = ref('');let selected_node = ref([]);/*** 功率改变函数* @param val*/function proChange_power(val) {selected_power.value = val;}/*** 场景改变函数* @param val*/function proChange_scene(val) {selected_scene.value = val;}/*** 节点改变函数* @param val*/function proChange_node(val) {selected_node.value = val;}// 全选函数function allSelectedFun() {options_node.value.forEach((item) => {let index = selected_node.value.indexOf(item.value);if (index == -1) {selected_node.value.push(item.value);}});};// 清空函数function clearFun() {selected_node.value.splice(0, selected_node.value.length);};/*** 查看图表*/function searchChart() {if (selected_scene.value == '') {alert("请选择场景！")return}if (selected_node.value == '') {alert("请选择节点！")return}if (selected_power.value == '') {alert("请选择功率！")return}if (props.option) {Object.assign(option, cloneDeep(props.option));}//节点let nodeArr = Array.from(new Set(props.chartData.map((item) => item.nodeName)));//轴数据let xAxisData = Array.from(new Set(props.chartData.map((item) => item.index)));let seriesData = [];nodeArr.forEach((node) => {selected_node.value.forEach((value) => {if (node === value) {let obj: any = {name: node, type: props.type};// update-begin-author:liusq date:2023-7-12 for: [issues/613] LineMulti 在数据不对齐时，横坐标计算错误let data = [];xAxisData.forEach((x) => {let dataArr = props.chartData.filter((item) =>x == item.index &&  // 索引selected_power.value == item.power &&  // 功率selected_scene.value == item.scene &&  // 场景node == item.nodeName // 节点);if (dataArr && dataArr.length > 0) {data.push(dataArr[0].value);} else {data.push(null);}});// update-end-author:liusq date:2023-7-12 for: [issues/613] LineMulti 在数据不对齐时，横坐标计算错误//data数据obj['data'] = data;seriesData.push(obj);}});});option.series = seriesData;option.xAxis.data = xAxisData;// option.legend.show = false;option.legend.selector = [{// 全选type: 'all',// 可以是任意你喜欢的标题title: '全选'},{// 反选type: 'inverse',// 可以是任意你喜欢的标题title: '反选'}];option.legend.selectedMode = false;option.legend.orient = 'vertical';option.legend.right = '0px';// option.legend.top = '-50px';console.log('option', option);setOptions(option);getInstance()?.off('click', onClick);getInstance()?.on('click', onClick);}function onClick(params) {emit('click', params);}/*** 初始化字典选项*/async function initDictConfig() {options_power.value = await initDictOptions('power');options_scene.value = await initDictOptions('scene');options_node.value = await initDictOptions('node');}onMounted(() => {//初始化字典选项initDictConfig();});return {options_power, options_scene, options_node,selected_power, selected_scene, selected_node,proChange_power, proChange_scene, proChange_node, chartRef, searchChart,allSelectedFun, clearFun};},
});
</script><style>
.flex-container {display: -webkit-flex;display: flex;
}.flex-item {width: 210px;
}.ant-select-multiple .ant-select-selection-overflow-item {flex: none;align-self: center;max-width: 100%;display: none;
}.my-ant-select-selection-placeholder {overflow: hidden;white-space: nowrap;text-overflow: ellipsis;flex: 1;color: rgba(0, 0, 0, 0.65);pointer-events: none;margin-top: -45px;margin-left: 20px;position: relative;
}
</style>