jQWidgets jqxListBox dragStart Property
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 jqxListBox is used to illustrate a jQuery ListBox widget which comprises a list of electable elements.
The dragStart property is a callback function that is invoked whenever a drag action begins. It is of type Function and its by default value is null.
Syntax:
To set the dragStart property:
$("#jqxListBox").jqxListBox({dragStart: function (item)
{
// disable dragging of 'item2' from listbox.
if (item.label == 'item2')
return false;
// to enable dragging of item2 from listbox.
return true;
}
});
To get the dragStart property:
var dragStart = $('#jqxListBox').jqxListBox('dragStart'); Linked Files: Download jQWidgets from the 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-1.11.1.min.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqx-all.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/jqxscrollbar.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxlistbox.js”></script>
Example: The below example illustrates the jqxListBox dragStart property in jQWidgets.
HTML
<html> <head> <link rel="stylesheet" href="jqwidgets/styles/jqx.base.css" type="text/css" /> <script type="text/javascript" src="scripts/jquery-1.11.1.min.js"> </script> <script type="text/javascript" src="jqwidgets/jqx-all.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/jqxscrollbar.js"> </script> <script type="text/javascript" src="jqwidgets/jqxlistbox.js"> </script> </head> <body> <center> <h1 style="color: green;"> GeeksforGeeks </h1> <h3> jQWidgets jqxListBox dragStart Property </h3> <div id="jqxLB"></div> <br /> <div id="log"></div> </center> <script type="text/javascript"> $(document).ready(function () { var data = ["CS", "CSS", "C++", "Java", "Scala"]; $("#jqxLB").jqxListBox({ source: data, allowDrop: true, allowDrag: true, width: "210px", height: "100px", dragStart: function (i) { $("#log").text( "Dragging item: " + i.label ); }, }); }); </script> </body></html> |
Output:
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