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Pie Charts

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 option that allows you to specify how the widget must behave when point labels overlap.

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<template> <div> <dx-pie-chart :data-source="dataSource" :resolve-label-overlapping="resolveMode" palette="Bright" title="Olympic Medals in 2008" > <dx-series argument-field="country" value-field="medals" > <dx-label :visible="true" :customize-text="formatText" /> </dx-series> <dx-margin :bottom="20"/> <dx-export :enabled="true"/> <dx-legend :visible="false"/> <dx-animation :enabled="false"/> </dx-pie-chart> <div class="options"> <div class="caption">Options</div> <div class="option"> <span>Label Overlapping Resolution Mode</span> <dx-select-box :data-source="resolveModes" v-model="resolveMode" /> </div> </div> </div> </template> <script> import DxPieChart, { DxSeries, DxLabel, DxMargin, DxExport, DxLegend, DxAnimation } from 'devextreme-vue/pie-chart'; import DxSelectBox from 'devextreme-vue/select-box'; import { dataSource } from './data.js'; export default { components: { DxPieChart, DxSeries, DxLabel, DxMargin, DxExport, DxLegend, DxAnimation, DxSelectBox }, data() { return { dataSource, resolveModes: ['shift', 'hide', 'none'], resolveMode: 'shift' }; }, methods: { formatText(pointInfo) { return `${pointInfo.argumentText} (${pointInfo.percentText})`; } } }; </script> <style> .options { padding: 20px; background-color: rgba(191, 191, 191, 0.15); margin-top: 20px; } .option { margin-top: 10px; } .caption { font-size: 18px; font-weight: 500; } .option > span { margin-right: 10px; } .option > .dx-widget { display: inline-block; vertical-align: middle; } </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>
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 }];
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 } });