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Vector Map

Palette

Documentation

This demo shows how to color specific map areas using a palette. In the VectorMap widget, a palette defines a range of colors that are used to paint areas. This range is divided into segments using the value assigned to the colorGroups option. Each segment contributes a color into an array of colors.

The map in this demo represents the top 40 countries by population. Map areas are colored according to the percentage of population.

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<template> <dx-vector-map id="vector-map" :bounds="bounds" > <dx-layer :data-source="mapsWorld" :color-groups="colorGroups" :customize="customizeLayer" palette="Violet" name="areas" color-grouping-field="population" /> <dx-legend :customize-text="customizeText" > <dx-source layer="areas" grouping="color" /> </dx-legend> </dx-vector-map> </template> <script> import * as mapsData from 'devextreme/dist/js/vectormap-data/world.js'; import { DxVectorMap, DxLayer, DxLegend, DxSource } from 'devextreme-vue/vector-map'; import { populations } from './data.js'; export default { components: { DxVectorMap, DxLayer, DxLegend, DxSource }, data() { return { mapsWorld: mapsData.world, bounds: [-180, 85, 180, -60], colorGroups: [0, 0.5, 0.8, 1, 2, 3, 100] }; }, methods: { customizeLayer(elements) { elements.forEach((element) => { element.attribute('population', populations[element.attribute('name')]); }); }, customizeText(arg) { let text; if(arg.index === 0) { text = '< 0.5%'; } else if(arg.index === 5) { text = '> 3%'; } else { text = `${arg.start }% to ${ arg.end }%`; } return text; } } }; </script> <style> #vector-map { height: 440px; } </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/19.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.3/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"> <span v-if="false">Loading...</span> </div> </div> </body> </html>
export const populations = { 'China': 19, 'India': 17.4, 'United States': 4.44, 'Indonesia': 3.45, 'Brazil': 2.83, 'Pakistan': 2.62, 'Nigeria': 2.42, 'Bangladesh': 2.18, 'Russia': 2.04, 'Japan': 1.77, 'Mexico': 1.67, 'Philippines': 1.39, 'Vietnam': 1.25, 'Ethiopia': 1.23, 'Egypt': 1.21, 'Germany': 1.13, 'Iran': 1.08, 'Turkey': 1.07, 'Congo (Kinshasa)': 0.94, 'France': 0.92, 'Thailand': 0.9, 'United Kingdom': 0.89, 'Italy': 0.85, 'Burma': 0.84, 'South Africa': 0.74, 'S. Korea': 0.7, 'Colombia': 0.66, 'Spain': 0.65, 'Tanzania': 0.63, 'Kenya': 0.62, 'Ukraine': 0.6, 'Argentina': 0.59, 'Algeria': 0.54, 'Poland': 0.54, 'Sudan': 0.52, 'Canada': 0.49, 'Uganda': 0.49, 'Iraq': 0.47, 'Morocco': 0.46, 'Uzbekistan': 0.43 };
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/dist/js/vectormap-data': 'npm:devextreme@19.2/dist/js/vectormap-data', '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' }, 'devextreme/dist/js/vectormap-data/*': { esModule: true } }, packages: { 'devextreme-vue': { main: 'index.js' }, 'devextreme': { defaultExtension: 'js' } }, babelOptions: { sourceMaps: false, stage0: true } });