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Polar and Radar Charts

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 widget'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 option 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:

For more information on annotation settings, refer to the annotations[] help topic.

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<template> <DxPolarChart id="radarChart" :data-source="dataSource" title="Average temperature in London" > <DxCommonSeriesSettings :opacity="0.75" type="bar" /> <DxSeries value-field="day" name="Day" color="#fdff5e" /> <DxSeries value-field="night" name="Night" color="#0f3b59" /> <DxCommonAnnotationSettings :opacity="0.7" :arrow-length="0" type="text" /> <DxAnnotation :angle="45" :radius="180" text="WINTER" /> <DxAnnotation :angle="135" :radius="180" text="SPRING" /> <DxAnnotation :angle="225" :radius="180" text="SUMMER" /> <DxAnnotation :angle="315" :radius="180" text="FALL" /> <DxAnnotation :argument="maxDay.arg" :opacity="1" :offset-x="105" :padding-top-bottom="15" :padding-left-right="15" :text="maxTempText" series="Day" /> <DxAnnotation :argument="minNight.arg" :opacity="1" :offset-x="105" :padding-top-bottom="15" :padding-left-right="15" :text="minTempText" series="Night" /> <DxArgumentAxis> <DxStrip start-value="December" end-value="February" color="#0076d1" /> <DxStrip start-value="March" end-value="May" color="#3ca3b0" /> <DxStrip start-value="June" end-value="August" color="#3fbc1e" /> <DxStrip start-value="September" end-value="November" color="#f0bb00" /> </DxArgumentAxis> <DxLegend horizontal-alignment="center" vertical-alignment="bottom" /> </DxPolarChart> </template> <script> import { DxPolarChart, DxCommonSeriesSettings, DxSeries, DxCommonAnnotationSettings, DxAnnotation, DxArgumentAxis, DxStrip, DxLegend } from 'devextreme-vue/polar-chart'; import { dataSource, maxDay, minNight } from './data.js'; export default { components: { DxPolarChart, DxCommonSeriesSettings, DxSeries, DxCommonAnnotationSettings, DxAnnotation, DxArgumentAxis, DxStrip, DxLegend }, data() { return { dataSource, maxDay, minNight, maxTempText: `Highest temperature: ${maxDay.day} °C`, minTempText: `Lowest temperature: ${minNight.night} °C` }; } }; </script> <style> #radarChart { height: 600px; } </style>
import { createApp } from 'vue'; import App from './App.vue'; createApp(App).mount('#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/20.2.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/css/dx.light.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>
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: { '*.vue': { loader: 'vue-loader' }, }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'vue': 'npm:vue@3.0.0/dist/vue.esm-browser.js', 'vue-loader': 'npm:dx-systemjs-vue-browser@1.0.15/index.js', 'mitt': 'npm:mitt/dist/mitt.umd.js', 'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@20.2.4', 'devextreme-vue': 'npm:devextreme-vue@20.2.4', 'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@0.9.7/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.0.5/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@2.0.8/dist/dx-gantt.js', 'preact': 'npm:preact@10.5.7/dist/preact.js', 'preact/hooks': 'npm:preact@10.5.7/hooks/dist/hooks.js', '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-vue': { main: 'index.js' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme/events/utils': { main: 'index' }, 'devextreme/events': { main: 'index' }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js' } }, babelOptions: { sourceMaps: false, stage0: true } });