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 val() method is used for setting or getting a value for the specified jqxKnob.
Syntax:
-
For getting the value:
var value = $('#jqxKnob').val();
-
For setting the value:
$('#jqxKnob').val(50);
Parameters: This method accepts a single parameter that is illustrated below:
- value: This is the specified new value that is going to be set.
Return Values: This method returns the new 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 jqxKnob val() method in jQWidgets.
<!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 val() Method
</ h3 >
< div id = 'jqx_Knob' >
</ div >
< input type = "button" style = "margin: 65px;" id = "button_for_val"
value = "Set value 20 to the above jqxKnob" />
< div id = "log" ></ div >
< script type = "text/javascript" >
$(document).ready(function () {
$('#jqx_Knob').jqxKnob({
value: 5,
min: 0,
max: 50,
width: 300,
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_val").jqxButton({
width: 350,
theme: 'energyblue'
});
$('#button_for_val').jqxButton().
click(function () {
$('#jqx_Knob').jqxKnob('val', 20);
})
});
</ script >
</ center >
</ body >
</ html >
|
Output:
Reference: https://www.jqwidgets.com/jquery-widgets-documentation/documentation/jqxknob/jquery-knob-api.htm