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Charts

Polar Chart Zooming and Scrolling API

To zoom a PolarChart into a specific range on the value axis, specify the PolarChart's visualRange option.

In this demo, this option is bound to the RangeSelector's value. When you move the sliders in the RangeSelector, you change the visualRange and zoom the PolarChart.

Once you set the zoom level, move the selected range left and right to scroll through data.

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<template> <div> <dx-polar-chart id="zoomedChart" :data-source="dataSource" title="Stochastic Process" > <dx-common-series-settings :closed="false" argument-field="argument" /> <dx-series type="scatter" name="Test results" value-field="value" > <dx-point :size="8"/> </dx-series> <dx-series type="line" name="Expected average" value-field="originalValue" > <dx-point :visible="false"/> </dx-series> <dx-argument-axis :start-angle="90" :tick-interval="30" /> <dx-value-axis :visual-range="visualRange"/> <dx-export :enabled="true"/> <dx-legend hover-mode="excludePoints" vertical-alignment="top" horizontal-alignment="center" /> </dx-polar-chart> <dx-range-selector :value.sync="visualRange" > <dx-size :height="100"/> <dx-margin :top="10" :left="60" :bottom="10" :right="50" /> <dx-scale :start-value="0" :end-value="8" :minor-tick-interval="0.1" :tick-interval="1" > <dx-minor-tick :visible="false"/> </dx-scale> <dx-behavior call-value-changed="onMoving"/> </dx-range-selector> </div> </template> <script> import DxPolarChart, { DxCommonSeriesSettings, DxSeries, DxPoint, DxArgumentAxis, DxValueAxis, DxExport, DxLegend } from 'devextreme-vue/polar-chart'; import DxRangeSelector, { DxSize, DxMargin, DxScale, DxMinorTick, DxBehavior } from 'devextreme-vue/range-selector'; import { dataSource } from './data.js'; export default { components: { DxPolarChart, DxCommonSeriesSettings, DxSeries, DxPoint, DxArgumentAxis, DxValueAxis, DxExport, DxLegend, DxRangeSelector, DxSize, DxMargin, DxScale, DxMinorTick, DxBehavior }, data() { return { dataSource, visualRange: { startValue: 0, endValue: 8 } }; } }; </script> <style> #zoomedChart { height: 440px; width: 100%; } </style>
import Vue from 'vue'; import App from './App.vue'; new Vue({ el: '#app', components: { App }, template: '<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/19.2.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/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>
function generateData(start, end, step) { const data = []; for (let i = start; i < end; i += step) { const originalValue = Math.log(i); data.push({ value: originalValue - (Math.sin(Math.random() * i) * i / end) + (1 - Math.random() * 2), originalValue: originalValue, argument: i }); } return data; } export const dataSource = generateData(0, 360, 0.75);
System.config({ transpiler: 'plugin-babel', paths: { 'npm:': 'https://unpkg.com/' }, map: { vue: 'npm:vue@2.6.3/dist/vue.esm.browser.js', 'vue-loader': 'npm:dx-systemjs-vue-browser@latest/index.js', 'devextreme': 'npm:devextreme@19.2', 'devextreme-vue': 'npm:devextreme-vue@19.2', jszip: 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.7/dist/quill.js', 'devexpress-diagram': 'npm:devexpress-diagram', 'devexpress-gantt': 'npm:devexpress-gantt', 'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js' }, meta: { '*.vue': { loader: 'vue-loader' } }, packages: { 'devextreme-vue': { main: 'index.js' }, 'devextreme': { defaultExtension: 'js' } }, babelOptions: { sourceMaps: false, stage0: true } });