$(() => {
const algorithms = ['sliceAndDice', 'squarified', 'strip', 'custom'];
let currentAlgorithm = algorithms[2];
const treeMap = $('#treemap').dxTreeMap({
dataSource: populationByAge,
layoutAlgorithm: currentAlgorithm,
colorizer: {
type: 'discrete',
colorizeGroups: true,
},
title: 'Population by Age Groups',
tooltip: {
enabled: true,
format: 'thousands',
customizeTooltip(arg) {
const { data } = arg.node;
const parentData = arg.node.getParent().data;
let result = '';
if (arg.node.isLeaf()) {
result = `<span class='country'>${parentData.name}</span><br />${
data.name}<br />${arg.valueText} (${
((100 * data.value) / parentData.total).toFixed(1)}%)`;
} else {
result = `<span class='country'>${data.name}</span>`;
}
return {
text: result,
};
},
},
}).dxTreeMap('instance');
$('#algorithm').dxSelectBox({
items: algorithms,
width: 200,
value: currentAlgorithm,
onValueChanged(data) {
if (data.value === 'custom') {
currentAlgorithm = customAlgorithm;
} else {
currentAlgorithm = data.value;
}
treeMap.option('layoutAlgorithm', currentAlgorithm);
},
});
function customAlgorithm(arg) {
let side = 0;
const totalRect = arg.rect.slice();
let totalSum = arg.sum;
arg.items.forEach((item) => {
const size = Math.round(((totalRect[side + 2]
- totalRect[side]) * item.value) / totalSum);
const rect = totalRect.slice();
totalSum -= item.value;
totalRect[side] += size;
rect[side + 2] = totalRect[side];
item.rect = rect;
side = 1 - side;
});
}
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<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" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script>
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/22.2.6/css/dx.light.css" />
<script src="https://cdn3.devexpress.com/jslib/22.2.6/js/dx.all.js"></script>
<script src="data.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="index.js"></script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="treemap"></div>
<div class="options">
<div class="caption">Options</div>
<div class="option">
<span>Tiling Algorithm</span>
<div id="algorithm" class="selectbox"></div>
</div>
</div>
</div>
</body>
</html>
#treemap {
height: 460px;
}
.country {
font-weight: 500;
}
.options {
padding: 20px;
background-color: rgba(191, 191, 191, 0.15);
margin-top: 20px;
}
.option {
margin-top: 10px;
}
.caption {
font-size: 18px;
font-weight: 500;
}
.option > span {
margin-right: 10px;
}
.option > .dx-widget {
display: inline-block;
vertical-align: middle;
}
const populationByAge = [{
name: 'Brazil',
total: 200050486,
items: [{
name: 'Age 0-14',
value: 48058462,
}, {
name: 'Age 15-44',
value: 96036995,
}, {
name: 'Age 45-64',
value: 40715296,
}, {
name: 'Age 65+',
value: 15239733,
}],
}, {
name: 'Japan',
total: 126345237,
items: [{
name: 'Age 0-14',
value: 16593766,
}, {
name: 'Age 15-44',
value: 45455276,
}, {
name: 'Age 45-64',
value: 32845790,
}, {
name: 'Age 65+',
value: 31450405,
}],
}, {
name: 'United States',
total: 318497627,
items: [{
name: 'Age 0-14',
value: 63968935,
}, {
name: 'Age 15-44',
value: 127217843,
}, {
name: 'Age 45-64',
value: 83145484,
}, {
name: 'Age 65+',
value: 44165365,
}],
}];
