Drill Down
Documentation
The TreeMap widget provides an API for implementing the drill-down functionality. Click a group in the widget to drill down it. A set of clickable labels, which allow you to navigate back, will appear.
www.wikipedia.org
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<template>
<div>
<DxTreeMap
:data-source="citiesPopulation"
:interact-with-group="true"
:max-depth="2"
@click="nodeClick"
@drill="drill"
>
<DxSize :height="440"/>
<DxColorizer palette="Soft"/>
<DxTitle
:placeholder-size="80"
text="The Most Populated Cities by Continents"
/>
</DxTreeMap>
<div id="drill-down-title">
<span
v-for="(info, index) in drillInfo"
:key="index"
>
<span
:class="{'link': !!info.node}"
@click="drillInfoClick(info.node)"
>{{ info.text }}</span>
<span v-if="index !== drillInfo.length - 1"> > </span>
</span>
</div>
</div>
</template>
<script>
import DxTreeMap, { DxSize, DxTitle, DxColorizer } from 'devextreme-vue/tree-map';
import { citiesPopulation } from './data.js';
export default {
components: {
DxTreeMap,
DxSize,
DxTitle,
DxColorizer
},
data() {
return {
drillInfo: [],
citiesPopulation
};
},
methods: {
nodeClick(e) {
e.node.drillDown();
},
drill(e) {
this.drillInfo = [];
for(let node = e.node.getParent(); node; node = node.getParent()) {
this.drillInfo.unshift({
text: node.label() || 'All Continents',
node: node
});
}
if(this.drillInfo.length) {
this.drillInfo.push({
text: e.node.label()
});
}
},
drillInfoClick(node) {
if(node) {
node.drillDown();
}
}
}
};
</script>
<style>
#drill-down-title {
position: absolute;
top: 50px;
height: 36px;
width: 100%;
text-align: center;
}
.link {
color: #337ab7;
text-decoration: underline;
cursor: pointer;
}
</style>
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/20.2.3/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.3/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">
</div>
</div>
</body>
</html>
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
}]
}]
}];
System.config({
transpiler: 'plugin-babel',
meta: {
'*.vue': {
loader: 'vue-loader'
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
'vue': 'npm:vue@3.0.0/dist/vue.esm-browser.js',
'vue-loader': 'npm:dx-systemjs-vue-browser@1.0.15/index.js',
'mitt': 'npm:mitt/dist/mitt.umd.js',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.3',
'devextreme-vue': 'npm:devextreme-vue@20.2.3',
'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.9.5/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.0/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.0/dist/dx-gantt.js',
'preact': 'npm:preact@10.5.5/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.5/hooks/dist/hooks.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'
},
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'
}
},
babelOptions: {
sourceMaps: false,
stage0: true
}
});