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    Tree Map

    Tiling Algorithms

    Documentation

    The TreeMap component supports three layout algorithms out of the box and provides the capability to implement your own algorithm. In this demo, you can change the applied algorithm at runtime using the drop-down menu above the component.

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    const DemoApp = angular.module('DemoApp', ['dx']); DemoApp.controller('DemoController', ($scope) => { const algorithms = ['sliceAndDice', 'squarified', 'strip', 'custom']; $scope.currentAlgorithmName = algorithms[2]; $scope.currentAlgorithm = $scope.currentAlgorithmName; $scope.treeMapOptions = { bindingOptions: { layoutAlgorithm: 'currentAlgorithm', }, dataSource: populationByAge, colorizer: { type: 'discrete', colorizeGroups: true, }, title: 'Population by Age Groups', tooltip: { enabled: true, format: 'thousands', customizeTooltip(arg) { const { data } = arg.node; const parentData = arg.node.getParent().data; let result = ''; if (arg.node.isLeaf()) { result = `<span class='country'>${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, }; }, }, }; $scope.selectBoxOptions = { bindingOptions: { value: 'currentAlgorithmName', }, items: algorithms, width: 200, onValueChanged(data) { if (data.value === 'custom') { $scope.currentAlgorithm = customAlgorithm; } else { $scope.currentAlgorithm = data.value; } }, }; 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/22.1.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/22.1.3/css/dx.light.css" /> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.8.2/angular.min.js"></script> <script>window.angular || document.write(decodeURIComponent('%3Cscript src="js/angular.min.js"%3E%3C/script%3E'))</script> <script src="https://cdn3.devexpress.com/jslib/22.1.3/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" ng-app="DemoApp" ng-controller="DemoController"> <div id="treemap" dx-tree-map="treeMapOptions"></div> <div class="options"> <div class="caption">Options</div> <div class="option"> <span>Tiling Algorithm</span> <div dx-select-box="selectBoxOptions" 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, }], }];