Setting size of cells in EJ2 TypeScript Dashboard layout control

8 May 202315 minutes to read

The entire layout dimensions are assigned based on the height and width of the parent element. Hence a responsive or static layout can be created by assigning a percentage or static dimension values to the parent element. The layout adapts to mobile resolutions by transforming the entire layout into a stacked orientation so that the panels will be displayed in a vertical column.

The Dashboard Layout is a grid structured component which can be split into subsections of equal size known as cells. The total number of cells in each row is defined using the columns property of the component. The width of each cell will be auto calculated based on total number of cells placed in a row and the height of a cell will be same as that of its width. However, the height of these cells can also be configured to any desired size using the cellAspectRatio property (cellwidth/cellheight ratio) which defines the cell width to height ratio.

The number of rows within the layout has no limits and can have any number of rows based on the panels count and position. Panels which acts as data containers will be placed or positioned over these cells.

Modifying cell size

In a dashboard, the data to be held by the panel in a cell may be of different size, hence different cell dimensions may be required in different scenarios. In this case, the size of these grid cells can be modified to the required size using the columns and cellAspectRatio properties.

The following sample demonstrates how to modify a cell size using columns and cellAspectRatio properties. In the below sample the width of the parent element is divided into 5 equal cells based on the columns property value resulting the width of each cell as 100px. The height of these cells will be 50px based on the cellAspectRatio value 100/50 (i.e. for every 100px of width, 50px will be the height of the cell).

index.ts
index.html
import { DashboardLayout } from '@syncfusion/ej2-layouts';

// initialize dashboardlayout component
let dashboard: DashboardLayout = new DashboardLayout({
    cellSpacing: [10, 10],
    columns: 5,
    cellAspectRatio: 100 / 50,
    panels: [{ "sizeX": 1, "sizeY": 1, "row": 0, "col": 0, content: '<div class="content">0</div>' },
    { "sizeX": 3, "sizeY": 2, "row": 0, "col": 1, content: '<div class="content">1</div>' },
    { "sizeX": 1, "sizeY": 3, "row": 0, "col": 4, content: '<div class="content">2</div>' },
    { "sizeX": 1, "sizeY": 1, "row": 1, "col": 0, content: '<div class="content">3</div>' },
    { "sizeX": 2, "sizeY": 1, "row": 2, "col": 0, content: '<div class="content">4</div>' },
    { "sizeX": 1, "sizeY": 1, "row": 2, "col": 2, content: '<div class="content">5</div>' },
    { "sizeX": 1, "sizeY": 1, "row": 2, "col": 3, content: '<div class="content">6</div>' }
    ]
});
// render initialized dashboardlayout
dashboard.appendTo('#dashboard_layout');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 DashboardLayout </title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 DashboardLayout Component" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-layouts/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id='container'>
        <!--element which is going to render the dashboardlayout-->
        <div id="dashboard_layout"></div>
    </div>
</body>
</html>

Setting cell spacing

The spacing between each panel in a row and column can be defined using the cellSpacing property. Adding spacing between the panels will make the layout effective and provides a clear data representation.

The following sample demonstrates the usage of the cellSpacing property which helps in a neat and clear representation of a data.

index.ts
index.html
import { DashboardLayout } from '@syncfusion/ej2-layouts';

// initialize dashboardlayout component
let dashboard: DashboardLayout = new DashboardLayout({
    cellSpacing: [20, 20],
    columns: 5,
    panels: [{ "sizeX": 1, "sizeY": 1, "row": 0, "col": 0, content: '<div class="content">0</div>' },
    { "sizeX": 3, "sizeY": 2, "row": 0, "col": 1, content: '<div class="content">1</div>' },
    { "sizeX": 1, "sizeY": 3, "row": 0, "col": 4, content: '<div class="content">2</div>' },
    { "sizeX": 1, "sizeY": 1, "row": 1, "col": 0, content: '<div class="content">3</div>' },
    { "sizeX": 2, "sizeY": 1, "row": 2, "col": 0, content: '<div class="content">4</div>' },
    { "sizeX": 1, "sizeY": 1, "row": 2, "col": 2, content: '<div class="content">5</div>' },
    { "sizeX": 1, "sizeY": 1, "row": 2, "col": 3, content: '<div class="content">6</div>' }
    ]
});
// render initialized dashboardlayout
dashboard.appendTo('#dashboard_layout');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 DashboardLayout </title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 DashboardLayout Component" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-layouts/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id='container'>
        <!--element which is going to render the dashboardlayout-->
        <div id="dashboard_layout"></div>
    </div>
</body>
</html>

Graphical representation of layout

These cells combinedly will form a grid-structured layout which will be hidden initially. This grid structured layout can be made visible by enabling the showGridLines property which clearly pictures the cells split-up within the layout. These gridlines will be helpful in panels sizing and placement within the layout during initial designing of a dashboard.

In the following sample, the grid lines indicate the cells split-up of the layout and the data containers placed over these cells are known as panels.

index.ts
index.html
import { DashboardLayout } from '@syncfusion/ej2-layouts';

// initialize dashboardlayout component
let dashboard: DashboardLayout = new DashboardLayout({
    cellSpacing: [10, 10],
    columns: 5,
    showGridLines: true,
    panels: [
        { "sizeX": 3, "sizeY": 2, "row": 0, "col": 1, content: '<div class="content">1</div>' },
        { "sizeX": 1, "sizeY": 3, "row": 0, "col": 4, content: '<div class="content">2</div>' },
        { "sizeX": 1, "sizeY": 1, "row": 2, "col": 2, content: '<div class="content">3</div>' },
        { "sizeX": 1, "sizeY": 1, "row": 2, "col": 3, content: '<div class="content">4</div>' }
    ]
});
// render initialized dashboardlayout
dashboard.appendTo('#dashboard_layout');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 DashboardLayout </title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 DashboardLayout Component" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-layouts/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id='container'>
        <!--element which is going to render the dashboardlayout-->
        <div id="dashboard_layout"></div>
    </div>
</body>
</html>

Rendering component in right-to-left direction

It is possible to render the Dashboard Layout in right-to-left direction by setting the enableRtl API to true.

The following sample demonstrates Dashboard Layout in right-to-left direction.

index.ts
index.html
import { DashboardLayout } from '@syncfusion/ej2-layouts';

// initialize dashboardlayout component
let dashboard: DashboardLayout  = new DashboardLayout({
    cellSpacing: [10, 10],
    enableRtl: true,
    columns: 5,
    panels: [{'sizeX': 1, 'sizeY': 1, 'row': 0, 'col': 0, header: '<div>Panel 0</div>', content:'<div class="content"></div>'},
    {'sizeX': 3, 'sizeY': 2, 'row': 0, 'col': 1, header: '<div>Panel 1</div>', content:'<div class="content"></div>'},
    {'sizeX': 1, 'sizeY': 3, 'row': 0, 'col': 4, header: '<div>Panel 2</div>', content:'<div class="content"></div>'},
    {'sizeX': 1, 'sizeY': 1, 'row': 1, 'col': 0, header: '<div>Panel 3</div>', content:'<div class="content"></div>'},
    {'sizeX': 2, 'sizeY': 1, 'row': 2, 'col': 0, header: '<div>Panel 4</div>', content:'<div class="content"></div>'},
    {'sizeX': 1, 'sizeY': 1, 'row': 2, 'col': 2, header: '<div>Panel 5</div>', content:'<div class="content"></div>'},
    {'sizeX': 1, 'sizeY': 1, 'row': 2, 'col': 3, header: '<div>Panel 6</div>', content:'<div class="content"></div>'}]
    });
// render initialized dashboardlayout
dashboard.appendTo('#dashboard_layout');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 DashboardLayout </title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 DashboardLayout Component" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-layouts/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
    <div id='container'>
        <div id="dashboard_layout"></div>      
    </div>
</body>
</html>

You can refer to our JavaScript Dashboard Layout feature tour page for its groundbreaking feature representations. You can also explore our JavaScript Dashboard Layout example to knows how to present and manipulate data.