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Pointers in JavaScript Linear Gauge control

Pointers are used to indicate values on the axis. Value of the pointer can be modified using the value property.

Source
Preview
app.ts
index.ts
index.html
import { LinearGauge } from '@syncfusion/ej2-lineargauge';
let gauge: LinearGauge = new LinearGauge({
    axes: [{
        pointers: [{
            value: 80
        }]
    }]
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <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 id='element'></div>
    </div>
</body>

</html>

Gauge supports two types of pointers namely,

  • Bar
  • Marker

You can choose any one of the pointer by using type property.

Marker Pointer

A marker pointer is a shape, that can be placed to mark the pointer value in the gauge. You can change the marker shape using markerType property in pointer options. The available marker types are,

  • Circle
  • Rectangle
  • Triangle
  • InvertedTriangle
  • Diamond

You can also use image instead of rendering shape as pointer. It can be achieved by using markerType property as Image set image path to ‘imageUrl’ in pointer.

Source
Preview
app.ts
index.ts
index.html
import { LinearGauge } from '@syncfusion/ej2-lineargauge';
let gauge: LinearGauge = new LinearGauge({
    axes: [{
        pointers: [{
            value: 80,
            type: 'Marker',
            markerType: 'Circle'
        }]
    }]
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <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 id='element'></div>
    </div>
</body>

</html>

Marker Pointer Customization

The marker can be customized by using color, height, width properties. And you can move the marker using offset and placement properties.

Source
Preview
app.ts
index.ts
index.html
import { LinearGauge } from '@syncfusion/ej2-lineargauge';
let gauge: LinearGauge = new LinearGauge({
    axes: [{
        pointers: [{
            value: 80,
            markerType: 'Circle',
            height: 15,
            width: 15,
            color: '#cd41f4'
        }]
    }]
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <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 id='element'></div>
    </div>
</body>

</html>

Bar Pointer

Bar pointer is used to track the axis value and it will render depending upon the container type. Bar pointer starts from the beginning of the gauge and ends at the pointer value.

Source
Preview
app.ts
index.ts
index.html
import { LinearGauge } from '@syncfusion/ej2-lineargauge';
let gauge: LinearGauge = new LinearGauge({
    axes: [{
        pointers: [{
            value: 60,
            type: 'Bar'
        }]
    }]
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <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 id='element'></div>
    </div>
</body>

</html>

Bar pointer customization

The bar pointer can be customized by using color, width and border properties. You can move the bar pointer using offset and placement property is not supported for bar pointer.

Source
Preview
app.ts
index.ts
index.html
import { LinearGauge } from '@syncfusion/ej2-lineargauge';
let gauge: LinearGauge = new LinearGauge({
    axes: [{
        pointers: [{
            value: 60,
            type: 'Bar',
            width: 20,
            color: '#f44141'
        }]
    }]
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <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 id='element'></div>
    </div>
</body>

</html>

Multiple Pointers

In addition to the default pointer, you can add n number of pointer to an axis.

Source
Preview
app.ts
index.ts
index.html
import { LinearGauge } from '@syncfusion/ej2-lineargauge';
let gauge: LinearGauge = new LinearGauge({
    axes: [{
        pointers: [
            {
                value: 80
            },
            {
                value: 60,
                markerType: 'Circle'
            },
            {
                value: 30,
                markerType: 'Diamond'
            }
            ]
        }]
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <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 id='element'></div>
    </div>
</body>

</html>

Pointer Animation

Pointer will animate on loading the gauge. This can be handled by using animationDuration property. You need to specify the duration of the animation in milliseconds.

Source
Preview
app.ts
index.ts
index.html
import { LinearGauge } from '@syncfusion/ej2-lineargauge';
let gauge: LinearGauge = new LinearGauge({
    axes: [{
        pointers: [{
            value: 60,
            animationDuration: 1000
        }]
    }]
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <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 id='element'></div>
    </div>
</body>

</html>
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