Hierarchical Data Structure
Documentation
The TreeMap widget visualizes hierarchical data as a set of nested rectangles whose sizes are proportional to the visualized values. In this demo, the widget accepts a data source of a hierarchical structure.
www.wikipedia.org
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import React from 'react';
import { citiesPopulation } from './data.js';
import TreeMap, { Tooltip } from 'devextreme-react/tree-map';
function App() {
return (
<TreeMap
id="treemap"
dataSource={citiesPopulation}
title="The Most Populated Cities by Continents"
>
<Tooltip
enabled={true}
format="thousands"
customizeTooltip={customizeTooltip}
/>
</TreeMap>
);
}
function customizeTooltip(arg) {
const data = arg.node.data;
return {
text: arg.node.isLeaf() ?
`<span class="city">${data.name}</span> (${data.country})<br/>Population: ${arg.valueText}` :
null
};
}
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(
<App />,
document.getElementById('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" />
<link rel="stylesheet" type="text/css" href="styles.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>
#treemap {
height: 500px;
}
.city {
font-weight: 500;
}
export const citiesPopulation = [{
name: 'Africa',
items: [{
value: 21324000,
name: 'Lagos',
country: 'Nigeria'
}, {
value: 9735000,
name: 'Kinshasa',
country: 'Democratic Republic of the Congo'
}, {
value: 9278441,
name: 'Cairo',
country: 'Egypt'
}]
}, {
name: 'Asia',
items: [{
value: 24256800,
name: 'Shanghai',
country: 'China'
}, {
value: 23500000,
name: 'Karachi',
country: 'Pakistan'
}, {
value: 21516000,
name: 'Beijing',
country: 'China'
}, {
value: 16787941,
name: 'Delhi',
country: 'India'
}, {
value: 15200000,
name: 'Tianjin',
country: 'China'
}]
}, {
name: 'Australia',
items: [{
value: 4840600,
name: 'Sydney',
country: 'Austraila'
}, {
value: 4440000,
name: 'Melbourne',
country: 'Austraila'
}]
}, {
name: 'Europe',
items: [{
value: 14160467,
name: 'Istanbul',
country: 'Turkey'
}, {
value: 12197596,
name: 'Moscow',
country: 'Russia'
}, {
value: 8538689,
name: 'London',
country: 'United Kingdom'
}, {
value: 5191690,
name: 'Saint Petersburg',
country: 'Russia'
}, {
value: 4470800,
name: 'Ankara',
country: 'Turkey'
}, {
value: 3517424,
name: 'Berlin',
country: 'Germany'
}]
}, {
name: 'North America',
items: [{
value: 8874724,
name: 'Mexico City',
country: 'Mexico'
}, {
value: 8550405,
name: 'New York City',
country: 'United States'
}, {
value: 3884307,
name: 'Los Angeles',
country: 'United States'
}, {
value: 2808503,
name: 'Toronto',
country: 'Canada'
}]
}, {
name: 'South America',
items: [{
value: 11895893,
name: 'São Paulo',
country: 'Brazil'
}, {
value: 8693387,
name: 'Lima',
country: 'Peru'
}, {
value: 7776845,
name: 'Bogotá',
country: 'Colombia'
}, {
value: 6429923,
name: 'Rio de Janeiro',
country: 'Brazil'
}]
}];
System.config({
transpiler: 'plugin-babel',
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@16/umd/react.development.js',
'react-dom': 'npm:react-dom@16/umd/react-dom.development.js',
'prop-types': 'npm:prop-types/prop-types.js',
'devextreme': 'npm:devextreme@19.2',
'devextreme-react': 'npm:devextreme-react@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',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js'
},
packages: {
'devextreme': {
defaultExtension: 'js'
},
'devextreme-react': {
main: 'index.js'
}
},
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
});