Pie with Resolved Label Overlapping
Documentation
In the PieChart, series may include a large number of points, which may result in point label overlapping. This demo illustrates the resolveLabelOverlapping property that allows you to specify how the component must behave when point labels overlap.
www.wikipedia.org
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import React from 'react';
import SelectBox from 'devextreme-react/select-box';
import PieChart, {
Series,
Label,
Margin,
Export,
Legend,
Animation,
} from 'devextreme-react/pie-chart';
import { dataSource, resolutionModeLabel } from './data.js';
const resolveModes = ['shift', 'hide', 'none'];
class App extends React.Component {
constructor(props) {
super(props);
this.state = {
resolveMode: resolveModes[0],
};
this.setResolveMode = this.setResolveMode.bind(this);
}
render() {
return (
<React.Fragment>
<PieChart
id="pie"
dataSource={dataSource}
palette="Bright"
title="Olympic Medals in 2008"
resolveLabelOverlapping={this.state.resolveMode}
>
<Series
argumentField="country"
valueField="medals"
>
<Label visible={true} customizeText={formatText} />
</Series>
<Margin bottom={20} />
<Export enabled={true} />
<Legend visible={false} />
<Animation enabled={false} />
</PieChart>
<div className="options">
<div className="caption">Options</div>
<div className="option">
<span>Label Overlapping Resolution Mode </span>
<SelectBox
dataSource={resolveModes}
inputAttr={resolutionModeLabel}
value={this.state.resolveMode}
onValueChanged={this.setResolveMode}
/>
</div>
</div>
</React.Fragment>
);
}
setResolveMode(data) {
this.setState({
resolveMode: data.value,
});
}
}
function formatText(arg) {
return `${arg.argumentText} (${arg.percentText})`;
}
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/23.1.5/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="https://unpkg.com/core-js@2.6.12/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>
.options {
padding: 20px;
background-color: rgba(191, 191, 191, 0.15);
margin-top: 20px;
}
.option {
margin-top: 10px;
display: flex;
align-items: center;
}
.caption {
font-size: 18px;
font-weight: 500;
}
.option > span {
margin-right: 10px;
}
.option > .dx-widget {
display: inline-block;
vertical-align: middle;
}
export const dataSource = [{
country: 'USA',
medals: 112,
}, {
country: 'China',
medals: 100,
}, {
country: 'Russia',
medals: 60,
}, {
country: 'Britain',
medals: 49,
}, {
country: 'Australia',
medals: 46,
}, {
country: 'France',
medals: 43,
}, {
country: 'Germany',
medals: 41,
}, {
country: 'South Korea',
medals: 32,
}, {
country: 'Cuba',
medals: 29,
}, {
country: 'Italy',
medals: 27,
}, {
country: 'Japan',
medals: 25,
}, {
country: 'Ukraine',
medals: 22,
}, {
country: 'Canada',
medals: 20,
}, {
country: 'Spain',
medals: 19,
}];
export const resolutionModeLabel = { 'aria-label': 'Resolution Mode' };
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@15.8.1/prop-types.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@23.1.5/cjs',
'devextreme-react': 'npm:devextreme-react@23.1.5',
'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.6.2/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.1/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.48/dist/dx-gantt.js',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.11',
'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras/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',
// Prettier
'prettier/standalone': 'npm:prettier@2.8.4/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.4/parser-html.js',
},
packages: {
'devextreme': {
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',
'npm:@devextreme/runtime@3.0.11/inferno/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true,
},
};
System.config(window.config);