API - Display a Tooltip
Documentation
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.
www.geohive.com
jQuery
AngularJS
Angular
ASP.NET MVC
ASP.NET Core
$(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-3.1.0.min.js"%3E%3C/script%3E'))</script>
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<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/18.1.3/css/dx.spa.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/18.1.3/css/dx.common.css" />
<link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/18.1.3/css/dx.light.css" />
<script src="https://cdn3.devexpress.com/jslib/18.1.3/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
}];