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
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import React from 'react';
import PieChart, { Series, Tooltip, Size, Legend } from 'devextreme-react/pie-chart';
import { SelectBox } from 'devextreme-react/select-box';
import { populationData } from './data.js';
class App extends React.Component {
constructor(props) {
super(props);
this.state = {
selectedRegion: null
};
this.pieChartRef = React.createRef();
this.onPointClick = this.onPointClick.bind(this);
this.onRegionChanged = this.onRegionChanged.bind(this);
}
render() {
return (
<React.Fragment>
<PieChart
ref={this.pieChartRef}
dataSource={populationData}
onPointClick={this.onPointClick}
type="doughnut"
palette="Soft Pastel"
title="The Population of Continents and Regions"
>
<Series argumentField="region" />
<Size height={350} />
<Tooltip
enabled={false}
format="millions"
customizeTooltip={customizeTooltip}
/>
<Legend visible={false} />
</PieChart>
<div className="controls-pane">
<SelectBox
width={250}
dataSource={populationData}
displayExpr="region"
valueExpr="region"
placeholder="Choose region"
value={this.state.selectedRegion}
onValueChanged={this.onRegionChanged}
/>
</div>
</React.Fragment>
);
}
get pieChart() {
return this.pieChartRef.current.instance;
}
onPointClick({ target: point }) {
this.showTooltip(point);
}
onRegionChanged({ value }) {
const point = this.pieChart.getAllSeries()[0].getPointsByArg(value)[0];
this.showTooltip(point);
}
showTooltip(point) {
point.showTooltip();
this.setState({
selectedRegion: point.argument
});
}
}
function customizeTooltip(pointInfo) {
return {
text: `${pointInfo.argumentText}<br/>${pointInfo.valueText}`
};
}
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(
<App />,
document.getElementById('app')
);
<!DOCTYPE html>
<html>
<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" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.3/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.3/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import('./index.js');
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
.controls-pane {
margin-top: 20px;
text-align: center;
}
.dx-selectbox {
display: inline-block;
}
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
}];
window.config = {
transpiler: 'plugin-babel',
meta: {
'devextreme/localization.js': {
"esModule": true
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@17.0.2/umd/react.development.js',
'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js',
'prop-types': 'npm:prop-types@15.7.2/prop-types.js',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.27.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@21.1.3/cjs',
'devextreme-react': 'npm:devextreme-react@21.1.3',
'jszip': 'npm:jszip@3.6.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.0.0/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.1.15/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@2.1.31/dist/dx-gantt.js',
'@devextreme/vdom': 'npm:@devextreme/vdom@1.2.1',
'inferno': 'npm:inferno@7.4.8/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat@7.4.8/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.8/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom@1.0.7/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.8/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.8/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class@7.4.8/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras@7.4.8/dist/inferno-extras.min.js',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js'
},
packages: {
'devextreme': {
defaultExtension: 'js'
},
'@devextreme/vdom': {
defaultExtension: 'js'
},
'devextreme-react': {
main: 'index.js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
packageConfigPaths: [
"npm:@devextreme/*/package.json",
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
};
System.config(window.config);