API - Display a Tooltip

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This demo illustrates how to show and hide the point’s tooltip with the API. To test this feature, select a continent from the drop-down menu under the PieChart or click a point directly in the PieChart.

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$(function(){ var chart = $("#chart").dxPieChart({ type: "doughnut", palette: "Soft Pastel", dataSource: dataSource, title: "The Population of Continents and Regions", tooltip: { enabled: false, format: "millions", customizeTooltip: function (arg) { return { text: arg.argumentText + "<br/>" + arg.valueText }; } }, size: { height:350 }, onPointClick: function(e) { var point = e.target; point.showTooltip(); region.option("value", point.argument); }, legend: { visible: false }, series: [{ argumentField: "region" }] }).dxPieChart("instance"); var region = $("#selectbox").dxSelectBox({ width: 250, dataSource: dataSource, displayExpr: "region", valueExpr: "region", placeholder: "Choose region", onValueChanged: function(data) { chart.getAllSeries()[0].getPointsByArg(data.value)[0].showTooltip(); } }).dxSelectBox("instance"); });

<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <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=1.0" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <script src="https://cdnjs.cloudflare.com/ajax/libs/cldrjs/0.4.4/cldr.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/cldrjs/0.4.4/cldr/event.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/cldrjs/0.4.4/cldr/supplemental.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/cldrjs/0.4.4/cldr/unresolved.min.js"></script> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/globalize/1.1.1/globalize.min.js"></script> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/globalize/1.1.1/globalize/message.min.js"></script> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/globalize/1.1.1/globalize/number.min.js"></script> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/globalize/1.1.1/globalize/currency.min.js"></script> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/globalize/1.1.1/globalize/date.min.js"></script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.1.3/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/19.1.3/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/19.1.3/js/dx.all.js"></script> <script src="data.js"></script> <link rel="stylesheet" type ="text/css" href ="styles.css" /> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="chart"></div> <div class="controls-pane"> <div id="selectbox"></div> </div> </div> </body> </html>

.controls-pane { margin-top: 20px; text-align: center; } .dx-selectbox { display: inline-block; }

var dataSource = [{ 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 }];