Palette
Documentation
This demo shows how to color specific map areas using a palette. In the VectorMap component, 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 property. 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.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
Thank you for the feedback!
If you have technical questions, please create a support ticket in the DevExpress Support Center.
Backend API
<template>
<DxVectorMap
id="vector-map"
:bounds="bounds"
>
<DxLayer
:data-source="mapsWorld"
:color-groups="colorGroups"
:customize="customizeLayer"
palette="Violet"
name="areas"
color-grouping-field="population"
/>
<DxTooltip
:enabled="true"
:customize-tooltip="customizeTooltip"
/>
<DxLegend
:customize-text="customizeText"
>
<DxSource
layer="areas"
grouping="color"
/>
</DxLegend>
</DxVectorMap>
</template>
<script setup lang="ts">
import * as mapsData from 'devextreme-dist/js/vectormap-data/world.js';
import {
DxVectorMap,
DxLayer,
DxLegend,
DxSource,
DxTooltip,
} from 'devextreme-vue/vector-map';
import { populations } from './data.ts';
const mapsWorld = mapsData.world;
const bounds = [-180, 85, 180, -60];
const colorGroups = [0, 0.5, 0.8, 1, 2, 3, 100];
const customizeTooltip = (arg) => ((arg.attribute('population'))
? { text: `${arg.attribute('name')}: ${arg.attribute('population')}% of world population` } : null);
const customizeText = ({ index, start, end }) => {
if (index === 0) {
return '< 0.5%';
}
return (index === 5) ? '> 3%' : `${start}% to ${end}%`;
};
function customizeLayer(elements) {
elements.forEach((element) => {
element.attribute('population', populations[element.attribute('name')]);
});
}
</script>
<style>
#vector-map {
height: 440px;
}
</style>
window.exports = window.exports || {};
window.config = {
transpiler: 'plugin-babel',
meta: {
'*.vue': {
loader: 'vue-loader',
},
'*.ts': {
loader: 'demo-ts-loader',
},
'*.svg': {
loader: 'svg-loader',
},
'devextreme/time_zone_utils.js': {
'esModule': true,
},
'devextreme/localization.js': {
'esModule': true,
},
'devextreme/viz/palette.js': {
'esModule': true,
},
'devextreme-dist/js/vectormap-data/*': {
'esModule': true,
},
},
paths: {
'root:': '../../../../../',
'npm:': 'https://unpkg.com/',
},
map: {
'vue': 'npm:vue@3.3.4/dist/vue.esm-browser.js',
'vue-loader': 'npm:dx-systemjs-vue-browser@1.1.1/index.js',
'demo-ts-loader': 'root:utils/demo-ts-loader.js',
'svg-loader': 'root:utils/svg-loader.js',
'devextreme-dist/js/vectormap-data': 'npm:devextreme-dist@23.2.5/js/vectormap-data',
'mitt': 'npm:mitt/dist/mitt.umd.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@23.2.5/cjs',
'devextreme-vue': 'npm:devextreme-vue@23.2.5/cjs',
'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.6.4/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.5/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.51/dist/dx-gantt.js',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.12',
'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.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',
// Prettier
'prettier/standalone': 'npm:prettier@2.8.4/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.4/parser-html.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',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
'npm:@devextreme/runtime@3.0.12/inferno/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
},
};
System.config(window.config);
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,
};
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/23.2.5/css/dx.light.css" />
<script src="https://unpkg.com/typescript@4.2.4/lib/typescript.js"></script>
<script type="module">
import * as vueCompilerSFC from "https://unpkg.com/@vue/compiler-sfc@3.3.4/dist/compiler-sfc.esm-browser.js";
window.vueCompilerSFC = vueCompilerSFC;
</script>
<script src="https://unpkg.com/core-js@2.6.12/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.ts");
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>