Customize Points and Labels
Documentation
This demo shows how you can customize individual points and labels in the Chart.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
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We appreciate your feedback.
import React from 'react';
import {
Chart,
Series,
Legend,
ValueAxis,
VisualRange,
Label,
ConstantLine,
Export,
} from 'devextreme-react/chart';
import { temperaturesData } from './data.js';
class App extends React.Component {
constructor(props) {
super(props);
this.state = {
highAverage: 77,
lowAverage: 58,
};
this.customizeLabel = this.customizeLabel.bind(this);
this.customizePoint = this.customizePoint.bind(this);
}
render() {
return (
<Chart
id="chart"
title="Daily Temperature in May"
dataSource={temperaturesData}
customizePoint={this.customizePoint}
customizeLabel={this.customizeLabel}
>
<Series
argumentField="day"
valueField="value"
type="bar"
color="#e7d19a"
/>
<ValueAxis maxValueMargin={0.01}>
<VisualRange startValue={40} />
<Label customizeText={this.customizeText} />
<ConstantLine
width={2}
value={this.state.lowAverage}
color="#8c8cff"
dashStyle="dash"
>
<Label text="Low Average" />
</ConstantLine>
<ConstantLine
width={2}
value={this.state.highAverage}
color="#ff7c7c"
dashStyle="dash"
>
<Label text="High Average" />
</ConstantLine>
</ValueAxis>
<Legend visible={false} />
<Export enabled={true} />
</Chart>
);
}
customizePoint(arg) {
if (arg.value > this.state.highAverage) {
return { color: '#ff7c7c', hoverStyle: { color: '#ff7c7c' } };
}
if (arg.value < this.state.lowAverage) {
return { color: '#8c8cff', hoverStyle: { color: '#8c8cff' } };
}
return null;
}
customizeLabel(arg) {
if (arg.value > this.state.highAverage) {
return {
visible: true,
backgroundColor: '#ff7c7c',
customizeText(e) {
return `${e.valueText}°F`;
},
};
}
return null;
}
customizeText(arg) {
return `${arg.valueText}°F`;
}
}
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/21.2.7/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.7/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>
#chart {
height: 440px;
}
export const temperaturesData = [{
day: '1',
value: 57,
}, {
day: '2',
value: 58,
}, {
day: '3',
value: 57,
}, {
day: '4',
value: 59,
}, {
day: '5',
value: 63,
}, {
day: '6',
value: 63,
}, {
day: '7',
value: 63,
}, {
day: '8',
value: 64,
}, {
day: '9',
value: 64,
}, {
day: '10',
value: 64,
}, {
day: '11',
value: 69,
}, {
day: '12',
value: 72,
}, {
day: '13',
value: 75,
}, {
day: '14',
value: 78,
}, {
day: '15',
value: 76,
}, {
day: '16',
value: 70,
}, {
day: '17',
value: 65,
}, {
day: '18',
value: 65,
}, {
day: '19',
value: 68,
}, {
day: '20',
value: 70,
}, {
day: '21',
value: 73,
}, {
day: '22',
value: 73,
}, {
day: '23',
value: 75,
}, {
day: '24',
value: 78,
}, {
day: '25',
value: 76,
}, {
day: '26',
value: 76,
}, {
day: '27',
value: 80,
}, {
day: '28',
value: 76,
}, {
day: '29',
value: 75,
}, {
day: '30',
value: 75,
}, {
day: '31',
value: 74,
}];
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@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.28.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@21.2.7/cjs',
'devextreme-react': 'npm:devextreme-react@21.2.7',
'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.5.14/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.1.47/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.0.13/dist/dx-gantt.js',
'@devextreme/runtime': 'npm:@devextreme/runtime@2.3.14',
'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat@7.4.11/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@7.4.11/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class@7.4.11/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras@7.4.11/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-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@2.3.14/inferno/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true,
},
};
System.config(window.config);