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Backend API
import React, { useCallback, useState } from 'react';
import TreeMap, {
Size, Title, Colorizer, TreeMapTypes,
} from 'devextreme-react/tree-map';
import { DrillInfo, citiesPopulation } from './data.ts';
import TreeMapBreadcrumbs from './TreeMapBreadcrumbs.tsx';
function drillInfoClick(node: DrillInfo['node']) {
if (node) {
node.drillDown();
}
}
function nodeClick(e: TreeMapTypes.ClickEvent) {
e.node.drillDown();
}
function App() {
const [drillInfo, setDrillInfo] = useState<DrillInfo[]>([]);
const drill = useCallback((e: TreeMapTypes.DrillEvent) => {
const newDrillInfo = [];
for (let node = e.node.getParent(); node; node = node.getParent()) {
newDrillInfo.unshift({
text: node.label() || 'All Continents',
node,
});
}
if (newDrillInfo.length) {
newDrillInfo.push({
text: e.node.label(),
});
}
setDrillInfo(newDrillInfo);
}, [setDrillInfo]);
return (
<React.Fragment>
<TreeMap
dataSource={citiesPopulation}
interactWithGroup={true}
maxDepth={2}
onClick={nodeClick}
onDrill={drill}
>
<Size height={440} />
<Colorizer palette="Soft" />
<Title
text="The Most Populated Cities by Continents"
placeholderSize={80}
/>
</TreeMap>
<TreeMapBreadcrumbs
className="drill-down-title"
onItemClick={drillInfoClick}
treeInfo={drillInfo}
/>
</React.Fragment>
);
}
export default App;
import React, { useCallback, useState } from 'react';
import TreeMap, { Size, Title, Colorizer } from 'devextreme-react/tree-map';
import { citiesPopulation } from './data.js';
import TreeMapBreadcrumbs from './TreeMapBreadcrumbs.js';
function drillInfoClick(node) {
if (node) {
node.drillDown();
}
}
function nodeClick(e) {
e.node.drillDown();
}
function App() {
const [drillInfo, setDrillInfo] = useState([]);
const drill = useCallback(
(e) => {
const newDrillInfo = [];
for (let node = e.node.getParent(); node; node = node.getParent()) {
newDrillInfo.unshift({
text: node.label() || 'All Continents',
node,
});
}
if (newDrillInfo.length) {
newDrillInfo.push({
text: e.node.label(),
});
}
setDrillInfo(newDrillInfo);
},
[setDrillInfo],
);
return (
<React.Fragment>
<TreeMap
dataSource={citiesPopulation}
interactWithGroup={true}
maxDepth={2}
onClick={nodeClick}
onDrill={drill}
>
<Size height={440} />
<Colorizer palette="Soft" />
<Title
text="The Most Populated Cities by Continents"
placeholderSize={80}
/>
</TreeMap>
<TreeMapBreadcrumbs
className="drill-down-title"
onItemClick={drillInfoClick}
treeInfo={drillInfo}
/>
</React.Fragment>
);
}
export default App;
import React, { useCallback } from 'react';
import { DrillInfo } from './data';
interface BreadcrumbProps {
key: string;
// eslint-disable-next-line no-unused-vars
onClick: (props: DrillInfo['node']) => void;
info: DrillInfo;
isLast: boolean;
}
function Breadcrumb(props: BreadcrumbProps) {
const onClick = useCallback(() => {
props.onClick(props.info.node);
}, [props]);
return (
<span>
<span
className={props.info.node ? 'link' : ''}
onClick={onClick}
>
{props.info.text}
</span>
{props.isLast ? '' : ' > '}
</span>
);
}
export default Breadcrumb;
import React from 'react';
import Breadcrumb from './Breadcrumb.tsx';
import { DrillInfo } from './data.ts';
interface TreeMapBreadcrumbsProps {
className: string;
// eslint-disable-next-line no-unused-vars
onItemClick: (node: DrillInfo['node']) => void;
treeInfo: DrillInfo[];
}
function TreeMapBreadcrumbs({ className, treeInfo, onItemClick }: TreeMapBreadcrumbsProps) {
const lastIndex = treeInfo.length - 1;
return (
<div className={className}>
{
treeInfo.map((info, index: number) => (
<Breadcrumb
key={info.text}
onClick={onItemClick}
info={info}
isLast={index === lastIndex} />
))
}
</div>
);
}
export default TreeMapBreadcrumbs;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
import { TreeMapTypes } from 'devextreme-react/tree-map';
export type DrillInfo = { text?: string, node?: TreeMapTypes.DrillEvent['node'] };
export const citiesPopulation = [{
name: 'Africa',
items: [{
name: 'Nigeria',
items: [{
name: 'Lagos',
value: 21324000,
}, {
name: 'Kano',
value: 3626068,
}, {
name: 'Ibadan',
value: 3200000,
}, {
name: 'Abuja',
value: 3000000,
}, {
name: 'Kaduna',
value: 1652844,
}, {
name: 'Port Harcourt',
value: 1320214,
}, {
name: 'Aba',
value: 1300000,
}, {
name: 'Ogbomosho',
value: 1200000,
}, {
name: 'Maiduguri',
value: 1197497,
}],
}, {
name: 'Egypt',
items: [{
name: 'Cairo',
value: 9278441,
}, {
name: 'Alexandria',
value: 4546231,
}, {
name: 'Giza',
value: 4239988,
}, {
name: 'Shubra El-Kheima',
value: 3072951,
}, {
name: 'Port Said',
value: 1607353,
}, {
name: 'Suez',
value: 1347352,
}],
}, {
name: 'Congo',
items: [{
name: 'Kinshasa',
value: 9735000,
}, {
name: 'Lubumbashi',
value: 1786397,
}, {
name: 'Mbuji-Mayi',
value: 1680991,
}, {
name: 'Kananga',
value: 1061181,
}, {
name: 'Bukavu',
value: 1012053,
}, {
name: 'Kisangani',
value: 935977,
}],
}, {
name: 'Morocco',
items: [{
name: 'Casablanca',
value: 3359818,
}, {
name: 'Fès',
value: 1112072,
}, {
name: 'Tangier',
value: 947952,
}, {
name: 'Marrakech',
value: 928850,
}, {
name: 'Salé',
value: 920403,
}],
}],
}, {
name: 'Asia',
items: [{
name: 'China',
items: [{
name: 'Shanghai',
value: 24256800,
}, {
name: 'Beijing',
value: 21516000,
}, {
name: 'Chongqing',
value: 18384100,
}, {
name: 'Chengdu',
value: 17677122,
}, {
name: 'Tianjin',
value: 15200000,
}, {
name: 'Guangzhou',
value: 13080500,
}, {
name: 'Shenzhen',
value: 10630000,
}],
}, {
name: 'Pakistan',
items: [{
name: 'Karachi',
value: 23500000,
}, {
name: 'Faisalabad',
value: 6418745,
}, {
name: 'Lahore',
value: 6318745,
}, {
name: 'Rawalpindi',
value: 3363911,
}, {
name: 'Hyderabad',
value: 3429471,
}, {
name: 'Multan',
value: 2050000,
}],
}, {
name: 'India',
items: [{
name: 'Delhi',
value: 16787941,
}, {
name: 'Mumbai',
value: 12478447,
}, {
name: 'Bengaluru',
value: 8425970,
}, {
name: 'Hyderabad',
value: 7749334,
}, {
name: 'Chennai',
value: 7088000,
}, {
name: 'Ahmedabad',
value: 5577940,
}],
}, {
name: 'Japan',
items: [{
name: 'Tokyo',
value: 9262046,
}, {
name: 'Yokohama',
value: 3697894,
}, {
name: 'Osaka',
value: 2668586,
}, {
name: 'Nagoya',
value: 2283289,
}, {
name: 'Sapporo',
value: 1918096,
}],
}],
}, {
name: 'Europe',
items: [{
name: 'Turkey',
items: [{
name: 'Istanbul',
value: 14160467,
}, {
name: 'Ankara',
value: 4470800,
}, {
name: 'İzmir',
value: 3276815,
}, {
name: 'Bursa',
value: 1957247,
}, {
name: 'Adana',
value: 1717473,
}],
}, {
name: 'Russia',
items: [{
name: 'Moscow',
value: 12197596,
}, {
name: 'Saint Petersburg',
value: 5191690,
}, {
name: 'Novosibirsk',
value: 1473754,
}, {
name: 'Yekaterinburg',
value: 1428042,
}],
}, {
name: 'United Kingdom',
items: [{
name: 'London',
value: 8538689,
}, {
name: 'Birmingham',
value: 1101360,
}, {
name: 'Glasgow',
value: 599650,
}, {
name: 'Liverpool',
value: 473073,
}],
}, {
name: 'Germany',
items: [{
name: 'Berlin',
value: 3517424,
}, {
name: 'Hamburg',
value: 1686100,
}, {
name: 'Munich',
value: 1185400,
}, {
name: 'Cologne',
value: 1046680,
}, {
name: 'Frankfurt',
value: 717624,
}],
}, {
name: 'France',
items: [{
name: 'Paris',
value: 2240621,
}, {
name: 'Marseille',
value: 852516,
}, {
name: 'Lyon',
value: 500715,
}, {
name: 'Toulouse',
value: 461190,
}],
}],
}, {
name: 'North America',
items: [{
name: 'Mexico',
items: [{
name: 'Mexico City',
value: 8874724,
}, {
name: 'Ecatepec de Morelos',
value: 1742023,
}, {
name: 'Puebla',
value: 1508707,
}, {
name: 'Guadalajara',
value: 1506359,
}, {
name: 'Juárez',
value: 1409987,
}, {
name: 'Tijuana',
value: 1399282,
}, {
name: 'León',
value: 1281434,
}],
}, {
name: 'United States',
items: [{
name: 'New York City',
value: 8550405,
}, {
name: 'Los Angeles',
value: 3884307,
}, {
name: 'Chicago',
value: 2722389,
}, {
name: 'Houston',
value: 2296224,
}, {
name: 'Philadelphia',
value: 1567442,
}, {
name: 'Phoenix',
value: 1563025,
}, {
name: 'San Antonio',
value: 1469845,
}, {
name: 'San Diego',
value: 1394928,
}],
}, {
name: 'Canada',
items: [{
name: 'Toronto',
value: 2808503,
}, {
name: 'Montreal',
value: 1731245,
}, {
name: 'Calgary',
value: 1096833,
}, {
name: 'Ottawa',
value: 956710,
}, {
name: 'Edmonton',
value: 895000,
}, {
name: 'Mississauga',
value: 713443,
}],
}, {
name: 'Cuba',
items: [{
name: 'Havana',
value: 2135498,
}, {
name: 'Santiago de Cuba',
value: 425851,
}, {
name: 'Camagüey',
value: 305845,
}],
}],
}, {
name: 'South America',
items: [{
name: 'Brazil',
items: [{
name: 'São Paulo',
value: 11895893,
}, {
name: 'Rio de Janeiro',
value: 6429923,
}, {
name: 'Salvador',
value: 2902927,
}, {
name: 'Brasília',
value: 2914830,
}, {
name: 'Fortaleza',
value: 2591188,
}, {
name: 'Belo Horizonte',
value: 2513451,
}, {
name: 'Manaus',
value: 2094391,
}],
}, {
name: 'Peru',
items: [{
name: 'Lima',
value: 8693387,
}, {
name: 'Callao',
value: 1010315,
}, {
name: 'Arequipa',
value: 869351,
}, {
name: 'Trujillo',
value: 788236,
}, {
name: 'Chiclayo',
value: 600440,
}],
}, {
name: 'Colombia',
items: [{
name: 'Bogotá',
value: 7776845,
}, {
name: 'Medellín',
value: 2441123,
}, {
name: 'Cali',
value: 2400653,
}, {
name: 'Barranquilla',
value: 1214253,
}, {
name: 'Cartagena',
value: 959594,
}],
}, {
name: 'Chile',
items: [{
name: 'Santiago',
value: 5507282,
}, {
name: 'Puente Alto',
value: 610118,
}, {
name: 'Maipú',
value: 468390,
}],
}, {
name: 'Venezuela',
items: [{
name: 'Caracas',
value: 3289886,
}, {
name: 'Maracaibo',
value: 1653211,
}, {
name: 'Barquisimeto',
value: 1116182,
}, {
name: 'Valencia',
value: 901900,
}, {
name: 'Ciudad Guayana',
value: 877547,
}],
}],
}];
window.exports = window.exports || {};
window.config = {
transpiler: 'ts',
typescriptOptions: {
module: 'system',
emitDecoratorMetadata: true,
experimentalDecorators: true,
jsx: 'react',
},
meta: {
'react': {
'esModule': true,
},
'typescript': {
'exports': 'ts',
},
'devextreme/time_zone_utils.js': {
'esModule': true,
},
'devextreme/localization.js': {
'esModule': true,
},
'devextreme/viz/palette.js': {
'esModule': true,
},
'openai': {
'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
'bundles:': '../../../../bundles/',
'externals:': '../../../../bundles/externals/',
},
defaultExtension: 'js',
map: {
'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js',
'react': 'npm:react@17.0.2/umd/react.development.js',
'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js',
'prop-types': 'npm:prop-types/prop-types.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@3.4.4/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign',
'devextreme': 'npm:devextreme@link:../../packages/devextreme/artifacts/npm/devextreme/cjs',
'devextreme-react': 'npm:devextreme-react@link:../../packages/devextreme-react/npm/cjs',
'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.5/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.54/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/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',
'devextreme-cldr-data': 'npm:devextreme-cldr-data@1.0.3',
// SystemJS plugins
'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@2.8.8/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js',
},
packages: {
'devextreme': {
defaultExtension: 'js',
},
'devextreme-react': {
main: 'index.js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/localization/messages': {
format: 'json',
defaultExtension: 'json',
},
'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,
react: true,
},
};
System.config(window.config);
import React, { useCallback } from 'react';
function Breadcrumb(props) {
const onClick = useCallback(() => {
props.onClick(props.info.node);
}, [props]);
return (
<span>
<span
className={props.info.node ? 'link' : ''}
onClick={onClick}
>
{props.info.text}
</span>
{props.isLast ? '' : ' > '}
</span>
);
}
export default Breadcrumb;
import React from 'react';
import Breadcrumb from './Breadcrumb.js';
function TreeMapBreadcrumbs({ className, treeInfo, onItemClick }) {
const lastIndex = treeInfo.length - 1;
return (
<div className={className}>
{treeInfo.map((info, index) => (
<Breadcrumb
key={info.text}
onClick={onItemClick}
info={info}
isLast={index === lastIndex}
/>
))}
</div>
);
}
export default TreeMapBreadcrumbs;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(<App />, document.getElementById('app'));
export const citiesPopulation = [
{
name: 'Africa',
items: [
{
name: 'Nigeria',
items: [
{
name: 'Lagos',
value: 21324000,
},
{
name: 'Kano',
value: 3626068,
},
{
name: 'Ibadan',
value: 3200000,
},
{
name: 'Abuja',
value: 3000000,
},
{
name: 'Kaduna',
value: 1652844,
},
{
name: 'Port Harcourt',
value: 1320214,
},
{
name: 'Aba',
value: 1300000,
},
{
name: 'Ogbomosho',
value: 1200000,
},
{
name: 'Maiduguri',
value: 1197497,
},
],
},
{
name: 'Egypt',
items: [
{
name: 'Cairo',
value: 9278441,
},
{
name: 'Alexandria',
value: 4546231,
},
{
name: 'Giza',
value: 4239988,
},
{
name: 'Shubra El-Kheima',
value: 3072951,
},
{
name: 'Port Said',
value: 1607353,
},
{
name: 'Suez',
value: 1347352,
},
],
},
{
name: 'Congo',
items: [
{
name: 'Kinshasa',
value: 9735000,
},
{
name: 'Lubumbashi',
value: 1786397,
},
{
name: 'Mbuji-Mayi',
value: 1680991,
},
{
name: 'Kananga',
value: 1061181,
},
{
name: 'Bukavu',
value: 1012053,
},
{
name: 'Kisangani',
value: 935977,
},
],
},
{
name: 'Morocco',
items: [
{
name: 'Casablanca',
value: 3359818,
},
{
name: 'Fès',
value: 1112072,
},
{
name: 'Tangier',
value: 947952,
},
{
name: 'Marrakech',
value: 928850,
},
{
name: 'Salé',
value: 920403,
},
],
},
],
},
{
name: 'Asia',
items: [
{
name: 'China',
items: [
{
name: 'Shanghai',
value: 24256800,
},
{
name: 'Beijing',
value: 21516000,
},
{
name: 'Chongqing',
value: 18384100,
},
{
name: 'Chengdu',
value: 17677122,
},
{
name: 'Tianjin',
value: 15200000,
},
{
name: 'Guangzhou',
value: 13080500,
},
{
name: 'Shenzhen',
value: 10630000,
},
],
},
{
name: 'Pakistan',
items: [
{
name: 'Karachi',
value: 23500000,
},
{
name: 'Faisalabad',
value: 6418745,
},
{
name: 'Lahore',
value: 6318745,
},
{
name: 'Rawalpindi',
value: 3363911,
},
{
name: 'Hyderabad',
value: 3429471,
},
{
name: 'Multan',
value: 2050000,
},
],
},
{
name: 'India',
items: [
{
name: 'Delhi',
value: 16787941,
},
{
name: 'Mumbai',
value: 12478447,
},
{
name: 'Bengaluru',
value: 8425970,
},
{
name: 'Hyderabad',
value: 7749334,
},
{
name: 'Chennai',
value: 7088000,
},
{
name: 'Ahmedabad',
value: 5577940,
},
],
},
{
name: 'Japan',
items: [
{
name: 'Tokyo',
value: 9262046,
},
{
name: 'Yokohama',
value: 3697894,
},
{
name: 'Osaka',
value: 2668586,
},
{
name: 'Nagoya',
value: 2283289,
},
{
name: 'Sapporo',
value: 1918096,
},
],
},
],
},
{
name: 'Europe',
items: [
{
name: 'Turkey',
items: [
{
name: 'Istanbul',
value: 14160467,
},
{
name: 'Ankara',
value: 4470800,
},
{
name: 'İzmir',
value: 3276815,
},
{
name: 'Bursa',
value: 1957247,
},
{
name: 'Adana',
value: 1717473,
},
],
},
{
name: 'Russia',
items: [
{
name: 'Moscow',
value: 12197596,
},
{
name: 'Saint Petersburg',
value: 5191690,
},
{
name: 'Novosibirsk',
value: 1473754,
},
{
name: 'Yekaterinburg',
value: 1428042,
},
],
},
{
name: 'United Kingdom',
items: [
{
name: 'London',
value: 8538689,
},
{
name: 'Birmingham',
value: 1101360,
},
{
name: 'Glasgow',
value: 599650,
},
{
name: 'Liverpool',
value: 473073,
},
],
},
{
name: 'Germany',
items: [
{
name: 'Berlin',
value: 3517424,
},
{
name: 'Hamburg',
value: 1686100,
},
{
name: 'Munich',
value: 1185400,
},
{
name: 'Cologne',
value: 1046680,
},
{
name: 'Frankfurt',
value: 717624,
},
],
},
{
name: 'France',
items: [
{
name: 'Paris',
value: 2240621,
},
{
name: 'Marseille',
value: 852516,
},
{
name: 'Lyon',
value: 500715,
},
{
name: 'Toulouse',
value: 461190,
},
],
},
],
},
{
name: 'North America',
items: [
{
name: 'Mexico',
items: [
{
name: 'Mexico City',
value: 8874724,
},
{
name: 'Ecatepec de Morelos',
value: 1742023,
},
{
name: 'Puebla',
value: 1508707,
},
{
name: 'Guadalajara',
value: 1506359,
},
{
name: 'Juárez',
value: 1409987,
},
{
name: 'Tijuana',
value: 1399282,
},
{
name: 'León',
value: 1281434,
},
],
},
{
name: 'United States',
items: [
{
name: 'New York City',
value: 8550405,
},
{
name: 'Los Angeles',
value: 3884307,
},
{
name: 'Chicago',
value: 2722389,
},
{
name: 'Houston',
value: 2296224,
},
{
name: 'Philadelphia',
value: 1567442,
},
{
name: 'Phoenix',
value: 1563025,
},
{
name: 'San Antonio',
value: 1469845,
},
{
name: 'San Diego',
value: 1394928,
},
],
},
{
name: 'Canada',
items: [
{
name: 'Toronto',
value: 2808503,
},
{
name: 'Montreal',
value: 1731245,
},
{
name: 'Calgary',
value: 1096833,
},
{
name: 'Ottawa',
value: 956710,
},
{
name: 'Edmonton',
value: 895000,
},
{
name: 'Mississauga',
value: 713443,
},
],
},
{
name: 'Cuba',
items: [
{
name: 'Havana',
value: 2135498,
},
{
name: 'Santiago de Cuba',
value: 425851,
},
{
name: 'Camagüey',
value: 305845,
},
],
},
],
},
{
name: 'South America',
items: [
{
name: 'Brazil',
items: [
{
name: 'São Paulo',
value: 11895893,
},
{
name: 'Rio de Janeiro',
value: 6429923,
},
{
name: 'Salvador',
value: 2902927,
},
{
name: 'Brasília',
value: 2914830,
},
{
name: 'Fortaleza',
value: 2591188,
},
{
name: 'Belo Horizonte',
value: 2513451,
},
{
name: 'Manaus',
value: 2094391,
},
],
},
{
name: 'Peru',
items: [
{
name: 'Lima',
value: 8693387,
},
{
name: 'Callao',
value: 1010315,
},
{
name: 'Arequipa',
value: 869351,
},
{
name: 'Trujillo',
value: 788236,
},
{
name: 'Chiclayo',
value: 600440,
},
],
},
{
name: 'Colombia',
items: [
{
name: 'Bogotá',
value: 7776845,
},
{
name: 'Medellín',
value: 2441123,
},
{
name: 'Cali',
value: 2400653,
},
{
name: 'Barranquilla',
value: 1214253,
},
{
name: 'Cartagena',
value: 959594,
},
],
},
{
name: 'Chile',
items: [
{
name: 'Santiago',
value: 5507282,
},
{
name: 'Puente Alto',
value: 610118,
},
{
name: 'Maipú',
value: 468390,
},
],
},
{
name: 'Venezuela',
items: [
{
name: 'Caracas',
value: 3289886,
},
{
name: 'Maracaibo',
value: 1653211,
},
{
name: 'Barquisimeto',
value: 1116182,
},
{
name: 'Valencia',
value: 901900,
},
{
name: 'Ciudad Guayana',
value: 877547,
},
],
},
],
},
];
<!DOCTYPE html>
<html lang="en">
<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=5.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.2.3/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<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.tsx");
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
.drill-down-title {
position: absolute;
top: 50px;
height: 36px;
width: 100%;
text-align: center;
}
.link {
color: #337ab7;
text-decoration: underline;
cursor: pointer;
}
In this demo, you can click/tap a group of TreeMap tiles to drill down. Once you go down a level, navigation links appear at the top of the TreeMap. Use them to drill back up. To implement this technique, follow the steps below:
-
Set the interactWithGroup property to
trueto force the control to hot-track entire groups instead of individual items. -
Call the node.drillDown method in the TreeMap onClick handler.
-
To enable drill-up functionality, generate links in the onDrill handler. Call the node.drillDown method on link clicks. Inspect the code below for implementation details.