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Selection and Highlight in JavaScript TreeMap control

26 Nov 2021 / 4 minutes to read

Selection

Selection is used to select a particular group or item to differentiate from other items. Each item or each group can be selected and deselected while interacting with the items. The corresponding Treemap items are also selected while tapping a specific legend item, and vice versa.

The fill property is used to change the selected item color. The color and the width properties are used to customize the selected item border, and the selection is enabled by using the enable property to true in the selectionSettings.

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index.ts
index.html
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import { TreeMap } from '@syncfusion/ej2-treemap';
let treemap: TreeMap = new TreeMap({
        dataSource: [
    { dataType: "Import", type: "Animal products",   product: "2010", sales: 20839332874 },
    { dataType: "Import", type: "Animal products",   product: "2011", sales: 23098635589 },
    { dataType: "Import", type: "Chemical products", product: "2010", sales: 141637951510 },
    { dataType: "Import", type: "Chemical products", product: "2011", sales: 161550338209 },
    { dataType: "Import", type: "Base metals",       product: "2010", sales: 86079439944 },
    { dataType: "Import", type: "Base metals",       product: "2011", sales: 103821671535 },
    { dataType: "Import", type: "Textile articles",       product: "2010", sales: 97126140830 },
    { dataType: "Import", type: "Textile articles",       product: "2011", sales: 104980750811 },
    { dataType: "Export", type: "Animal products",   product: "2010", sales:  15845503378 },
    { dataType: "Export", type: "Animal products",   product: "2011", sales:  20650111620 },
    { dataType: "Export", type: "Chemical products", product: "2010", sales: 136100054087 },
    { dataType: "Export", type: "Chemical products", product: "2011", sales: 146341672411 },
    { dataType: "Export", type: "Base metals",       product: "2010", sales: 59060592813 },
    { dataType: "Export", type: "Base metals",       product: "2011", sales: 71785882641 },
    { dataType: "Export", type: "Textile articles",       product: "2010", sales: 20982380561 },
    { dataType: "Export", type: "Textile articles",       product: "2011", sales: 26016143783 }
],
        weightValuePath: 'sales',
        levels: [
            { groupPath: 'dataType', fill: '#c5e2f7', headerStyle: { size: '16px' }, headerAlignment: 'Center', groupGap: 5 },
            { groupPath: 'product', fill: '#a4d1f2', headerAlignment: 'Center' , groupGap: 2 }
        ],
        leafItemSettings: {
            labelPath: 'type',
            fill: '#8ebfe2',
            labelPosition: 'Center'
        },
        selectionSettings: {
            enable: true,
            fill: '#58a0d3',
            border: { width: 0.3, color: 'black' },
            opacity: '1'
        },
}, '#container');
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<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 for Treemap </title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for treemap UI Control" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
    </div>
</body>

</html>

Highlight

Highlight is used to highlight an item or group from other items or groups. Each item or each group can be highlighted by hovering the mouse over the items. The corresponding Treemap items are also be highlighted while hovering over a specific legend item, and vice versa.

The fill property is used to change the highlighted item color. The color and the width properties are used to customize the highlighted item border, and the highlight is enabled by setting the enable property to true in the highlightSettings.

Source
Preview
index.ts
index.html
Copied to clipboard
import { TreeMap } from '@syncfusion/ej2-treemap';
let treemap: TreeMap = new TreeMap({
        dataSource: [
    { dataType: "Import", type: "Animal products",   product: "2010", sales: 20839332874 },
    { dataType: "Import", type: "Animal products",   product: "2011", sales: 23098635589 },
    { dataType: "Import", type: "Chemical products", product: "2010", sales: 141637951510 },
    { dataType: "Import", type: "Chemical products", product: "2011", sales: 161550338209 },
    { dataType: "Import", type: "Base metals",       product: "2010", sales: 86079439944 },
    { dataType: "Import", type: "Base metals",       product: "2011", sales: 103821671535 },
    { dataType: "Import", type: "Textile articles",       product: "2010", sales: 97126140830 },
    { dataType: "Import", type: "Textile articles",       product: "2011", sales: 104980750811 },
    { dataType: "Export", type: "Animal products",   product: "2010", sales:  15845503378 },
    { dataType: "Export", type: "Animal products",   product: "2011", sales:  20650111620 },
    { dataType: "Export", type: "Chemical products", product: "2010", sales: 136100054087 },
    { dataType: "Export", type: "Chemical products", product: "2011", sales: 146341672411 },
    { dataType: "Export", type: "Base metals",       product: "2010", sales: 59060592813 },
    { dataType: "Export", type: "Base metals",       product: "2011", sales: 71785882641 },
    { dataType: "Export", type: "Textile articles",       product: "2010", sales: 20982380561 },
    { dataType: "Export", type: "Textile articles",       product: "2011", sales: 26016143783 }
],
        weightValuePath: 'sales',
        levels: [
            { groupPath: 'dataType', fill: '#c5e2f7', headerStyle: { size: '16px' }, headerAlignment: 'Center', groupGap: 5 },
            { groupPath: 'product', fill: '#a4d1f2', headerAlignment: 'Center' , groupGap: 2 }
        ],
        leafItemSettings: {
            labelPath: 'type',
            fill: '#8ebfe2',
            labelPosition: 'Center'
        },
         highlightSettings: {
            enable: true,
            fill: '#71b0dd',
            border: { width: 0.3, color: 'black' },
            opacity: '1'
        }
}, '#container');
Copied to clipboard
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 for Treemap </title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for treemap UI Control" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
    </div>
</body>

</html>