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 value property is used for setting or getting the value for the specified jqxKnob.
Syntax:
- For setting the value property.
$('#jqxKnob').jqxKnob({value: 5 }); - For getting the value property.
var allowValueChangeOnClick = $('#jqxKnob').jqxKnob('value');
Linked Files: Download jQWidgets 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 value property. In the below example, the value for the value property has been set to 5.
<!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 value Property </h3>
<div id='jqx_Knob'>
</div>
<input type="button" style="margin:65px;"
id="button_for_value"
value="Value of the value 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,
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_value").jqxButton({
width: 350,
theme: 'energyblue'
});
$('#button_for_value')
.jqxButton().click(function () {
var value_of_value =
$('#jqx_Knob').jqxKnob('value');
$("#log").html(value_of_value);
})
});
</script>
</center>
</body>
</html>
Output:
