Vue Charts - Tooltip API

You can use tooltip API members to manage tooltip visibility in code. This demo creates a DevExtreme PieChart and disables its default tooltip. When you click a pie segment or select an item in the "Choose Region" box, a showTooltip() method call displays the corresponding tooltip.

www.wikipedia.org

Backend API

<template> <div> <DxPieChart ref="pieChart" :data-source="populationData" type="doughnut" palette="Soft Pastel" title="The Population of Continents and Regions" @point-click="onPointClick" > <DxSeries argument-field="region"/> <DxSize :height="350"/> <DxTooltip :enabled="false" :customize-tooltip="customizeTooltip" format="millions" /> <DxLegend :visible="false"/> </DxPieChart> <div class="controls-pane"> <DxSelectBox :width="250" :data-source="populationData" :input-attr="{ 'aria-label': 'Region' }" :value="selectedRegion" display-expr="region" value-expr="region" placeholder="Choose region" @value-changed="onRegionChanged" /> </div> </div> </template> <script setup lang="ts"> import { ref } from 'vue'; import DxPieChart, { DxSeries, DxTooltip, DxSize, DxLegend, type DxPieChartTypes, } from 'devextreme-vue/pie-chart'; import DxSelectBox, { type DxSelectBoxTypes } from 'devextreme-vue/select-box'; import { populationData } from './data.ts'; const selectedRegion = ref<string>(); const pieChart = ref(); const customizeTooltip = ({ argumentText, valueText }: DxPieChartTypes.PointInfo) => ({ text: `${argumentText}<br/>${valueText}`, }); function onPointClick({ target: point }: DxPieChartTypes.PointClickEvent) { point.showTooltip(); selectedRegion.value = (point as Record<string, any>).argument; } function onRegionChanged({ value }: DxSelectBoxTypes.ValueChangedEvent) { pieChart.value.instance .getAllSeries()[0] .getPointsByArg(value)[0] .showTooltip(); } </script> <style> .controls-pane { margin-top: 20px; text-align: center; } .dx-selectbox { display: inline-block; } </style>

export const populationData = [{ region: 'Asia', val: 4119626293, }, { region: 'Africa', val: 1012956064, }, { region: 'Northern America', val: 344124520, }, { region: 'Latin America and the Caribbean', val: 590946440, }, { region: 'Europe', val: 727082222, }, { region: 'Oceania', val: 35104756, }];

import { createApp } from 'vue'; import App from './App.vue'; createApp(App).mount('#app');

<!DOCTYPE html> <html lang="en"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/26.1.5/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="./bundle.css" /> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"> </div> </div> <script src="bundles/vendor/vue.vendor.js"></script> <script src="./bundle.js"></script> </body> </html>