Polar Chart with Annotations
Annotations are containers for images, text blocks, and custom content that display additional information about the visualized data.
To create annotations, populate the PolarChart's annotations array. Each object in the array configures an individual annotation. To specify settings for all annotations, use the commonAnnotationSettings object. Individual settings take precedence over common settings.
You can set each annotation's type property to "text", "image", or "custom". This demo shows only "text" annotations.
You can place annotations at specific coordinates or anchor them to PolarChart elements. This demo illustrates the following annotation placement methods:
- Angle and radius properties specify the position of annotations with season names.
- Annotations with temperatures are anchored to series, and the offsetX, paddingTopBottom, and paddingLeftRight properties specify their position.
For more information on annotation settings, refer to the annotations[] help topic.
www.weather.com
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import React from 'react';
import {
PolarChart,
CommonSeriesSettings,
Series,
CommonAnnotationSettings,
Annotation,
ArgumentAxis,
Strip,
Legend
} from 'devextreme-react/polar-chart';
import { dataSource, maxDay, minNight } from './data.js';
class App extends React.Component {
constructor(props) {
super(props);
this.maxTempText = `Highest temperature: ${maxDay.day} °C`;
this.minTempText = `Lowest temperature: ${minNight.night} °C`;
}
render() {
return (
<PolarChart
id="radarChart"
dataSource={dataSource}
title="Average temperature in London"
>
<CommonSeriesSettings
type="bar"
opacity={0.75}
/>
<Series
valueField="day"
name="Day"
color="#fdff5e"
/>
<Series
valueField="night"
name="Night"
color="#0f3b59"
/>
<CommonAnnotationSettings
opacity={0.7}
arrowLength={0}
type="text"
/>
<Annotation
angle={45}
radius={180}
text="WINTER"
/>
<Annotation
angle={135}
radius={180}
text="SPRING"
/>
<Annotation
angle={225}
radius={180}
text="SUMMER"
/>
<Annotation
angle={315}
radius={180}
text="FALL"
/>
<Annotation
argument={maxDay.arg}
opacity={1}
offsetX={105}
paddingTopBottom={15}
paddingLeftRight={15}
text={this.maxTempText}
series="Day"
/>
<Annotation
argument={minNight.arg}
opacity={1}
offsetX={105}
paddingTopBottom={15}
paddingLeftRight={15}
text={this.minTempText}
series="Night"
/>
<ArgumentAxis>
<Strip
startValue="December"
endValue="February"
color="#0076d1">
</Strip>
<Strip
startValue="March"
endValue="May"
color="#3ca3b0">
</Strip>
<Strip
startValue="June"
endValue="August"
color="#3fbc1e">
</Strip>
<Strip
startValue="September"
endValue="November"
color="#f0bb00">
</Strip>
</ArgumentAxis>
<Legend
horizontalAlignment="center"
verticalAlignment="bottom"
/>
</PolarChart>
);
}
}
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/20.2.6/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.6/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>
#radarChart {
height: 600px;
}
export const dataSource = [{
arg: 'December',
day: 7,
night: 3
}, {
arg: 'January',
day: 6,
night: 2
}, {
arg: 'February',
day: 7,
night: 3
}, {
arg: 'March',
day: 10,
night: 3
}, {
arg: 'April',
day: 14,
night: 5
}, {
arg: 'May',
day: 18,
night: 8
}, {
arg: 'June',
day: 21,
night: 11
}, {
arg: 'July',
day: 22,
night: 13
}, {
arg: 'August',
day: 21,
night: 13
}, {
arg: 'September',
day: 19,
night: 11
}, {
arg: 'October',
day: 15,
night: 8
}, {
arg: 'November',
day: 10,
night: 4
}];
export const maxDay = dataSource.reduce((prev, current) =>
prev.day >= current.day ? prev : current
);
export const minNight = dataSource.reduce((prev, current) =>
prev.day <= current.day ? prev : current
);
System.config({
transpiler: 'plugin-babel',
meta: {
'devextreme/localization.js': {
"esModule": true
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@16.14.0/umd/react.development.js',
'react-dom': 'npm:react-dom@16.14.0/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@1.26.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.6',
'devextreme-react': 'npm:devextreme-react@20.2.6',
'jszip': 'npm:jszip@3.6.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.10.3/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.18/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.24/dist/dx-gantt.js',
'preact': 'npm:preact@10.5.13/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.13/hooks/dist/hooks.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'
}
},
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
});