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jQWidgets jqxKnob pointerGrabAction Property

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  • Last Updated : 28 Nov, 2021

jQWidgets is a JavaScript framework for making web-based applications for PC and mobile devices. It is a very powerful, optimized, platform-independent, and widely supported framework. The jqxKnob is used for representing a jQuery plugin having a round shape and displaying a draggable indicator within a range of the specified values. This API can also be used in a table or matrix for showing the relative value of a field in a range of values in the specified data region.

The pointerGrabAction property is used for setting or getting the pointerGrabAction property for the specified jqxKnob. Its possible values are “normal”, “progressBar”, and “pointer”.

Syntax:

  • For setting the pointerGrabAction property:
    $('#jqxKnob').jqxKnob({pointerGrabAction: "pointer" });
  • For getting the pointerGrabAction property:
    var allowValueChangeOnClick = 
        $('#jqxKnob').jqxKnob('pointerGrabAction');

Linked Files: Download https://www.jqwidgets.com/download/  from the given link. In the HTML file, locate the script files in the downloaded folder.

<link rel=”stylesheet” href=”jqwidgets/styles/jqx.base.css” type=”text/css” />
<script type=”text/javascript” src=”scripts/jquery.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxcore.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxbuttons.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdraw.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxknob.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxnumberinput.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqx-all.js”></script>

Example: The below example illustrates the jQWidgets jqxKnob pointerGrabAction property. In the below example, the value for the pointerGrabAction property has been set to “pointer”.

HTML




<!DOCTYPE html>
<html lang="en">
  
<head>
    <link rel="stylesheet" 
          href="jqwidgets/styles/jqx.base.css" 
          type="text/css"/>
    <script type="text/javascript" 
            src="scripts/jquery.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxcore.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxbuttons.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxdraw.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxknob.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxnumberinput.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqx-all.js">
    </script>
</head>
<body>
    <center>
        <h1 style="color:green;">
            GeeksforGeeks
        </h1>
        <h3>
            jQWidgets jqxKnob pointerGrabAction Property
        </h3>
        <div id='jqx_Knob'>
        </div>
        <input type="button" style="margin: 65px;" 
               id="button_for_pointerGrabAction"
               value="Value of the pointerGrabAction property"/>
        <div id="log"></div>
        <script type="text/javascript">
            $(document).ready(function () {
                $('#jqx_Knob').jqxKnob({
                    value: 5,
                    min: 0,
                    max: 50,
                    startAngle: 0,
                    endAngle: 360,
                    pointerGrabAction: "pointer",
                    snapToStep: true,
                    marks: {
                        colorRemaining: { color: 'red' },
                        colorProgress: { color: 'green' },
                        offset: '70%',
                        thickness: 5,
                        size: '4%'
                    },
                    labels: {
                        offset: '85%',
                        step: 5
                    },
                    progressBar: {
                        style: {
                            fill: 'yellow',
                            stroke: 'black'
                        },
                        size: '8%',
                        offset: '61%',
                        background: { fill: 'black' }
                    },
                    pointer: {
                        type: 'arrow',
                        style: { fill: 'green' },
                        size: '68%',
                        offset: '29%',
                        thickness: 15
                    }
                });
                $("#button_for_pointerGrabAction").jqxButton({
                    width: 350,
                    theme: 'energyblue'
                });
                $('#button_for_pointerGrabAction').jqxButton().
                    click(function () {
                        var value_of_pointerGrabAction =
                            $('#jqx_Knob').jqxKnob(
                                'pointerGrabAction');
                        $("#log").html(
                            value_of_pointerGrabAction);
                    })
            });
        </script>
    </center>
</body>
  
</html>

Output:

Reference: https://www.jqwidgets.com/jquery-widgets-documentation/documentation/jqxknob/jquery-knob-api.htm?search=


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